SS01

Co-chairs: Teixeira de Mello F. (Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional Este, Universidad de la República, Uruguai), Meerhoff, M. (Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional Este, Universidad de la República-Uruguay), Daniela Rosero Lopez (Universidad San Francisco de Quito, Ecuador)

Title: STATE AND TRENDS OF LATINO-AMERICA FRESHWATERS

Abstract: Latin America is rich in freshwater resources including the Amazon Basin, the Paraná-La Plata river system, the glaciers in the Andes. However, it also has large arid and semi-arid areas with recurring droughts such as desert in Mexico and Chile.  Due to climate change, water scarcity is expected to increase in several areas, including in the Andes, where the melting glaciers will have a great effect on the water supply. In addition, the increasing human impact with high populated cities, deforestation, contamination etc. impose a risk for freshwater resources. This session will bring together researchers working in different Latinoamerican freshwater regions to examine how aquatic environments act as integrators and indicators of environmental change in the past and present.  In this sense we propose to integrate physical, chemical and biological aspects of these ecosystems, as well as paleolimnological studies of their long term variability.

SS02

Co-chairs: Melack, J (University of California Santa Barbara, Estados Unidos), Amaral, J H F (Universidad del Rosario, Bogota, Colômbia), Forsberg, B R (INPA, Manaus, Manaus, AM, Brasil)

Title: Tropical floodplain lakes: ecological and hydrological processes

Abstract: Floodplain lakes and associated vegetated habitats are an integral part of hydrologically and ecologically complex tropical river systems and their conservation and management are of critical importance to the local inhabitants. Tropical floodplains are characterized by seasonal floods that exchange nutrients and organisms among habitats, sustain substantial primary production, support important fisheries and are large methane sources to the atmosphere. Field measurements, remote sensing and modelling are increasing understanding of tropical floodplain lakes, especially within the major river systems of South America. Similar lakes have been examined in tropical Australia, Africa and Asia. Aquatic biodiversity, biogeochemistry and ecological function of these aquatic ecosystems is of considerable scientific and societal importance and interest. Results from studies of specific lakes and regional analyses that examine ecological and hydrological processes, temporal and spatial variability, responses to climatic changes and impacts associated with deforestation, mining and hydroelectric dams are welcome. Discussion of establishing coordinated programs that underpin sound management is also relevant

SS06

Co-chairs: MACIEL, D (INPE, São José dos Campos, SP, Brasil), OGASHAWARA, I (Leibniz Institute of Freshwater Ecology and Inland Fisheries, Alemanha), RUIZ-VERDU, A (Universitat de Valencia – IPL, Espanha)

Title: From local to global water quality assessment with remote sensing

Abstract: Global, large-scale, continuous, and frequent water quality measurements have been key challenges in limnology science. Acquiring comprehensive datasets highly representative in space and time requires large field missions, which is a limitation mainly in spatially vast countries. However, remote sensing has recently played a key role in advancing water quality mapping by allowing the retrieval of optical and physical water properties from local to global scale. Several key factors have contributed to this transformative shift: i) Space science and technology advances increased the availability of Earth Observation data; ii) Enhanced Sensor Capabilities; iii) Global Collaborations (open-source datasets and science); iv) Computational Power (robust Machine Learning and physical-based models); v) Cloud Computing Platforms. For instance, phytoplankton pigments retrieval through hyperspectral sensors, near-real-time monitoring of water quality (~3 days or less), and high spatiotemporal resolutions introduced by the commercial sector, aligned with global data-sharing approaches are some of the greatest achievements that empowered the advancement of aquatic remote sensing in the recent years. This session aims to showcase the latest applications of remote sensing in limnological studies, spanning from local to global scales. We invite contributions focused on algorithm developments, calibration and validation, monitoring and detecting phytoplankton properties such as CyanoHabs, carbon fractions (e.g., dissolved organic matter), and other topics related to limnological remote sensing. Research on sensor validation for water applications, virtual constellations, atmospheric correction, and time-series analysis emphasizing water quality and remote sensing are also highly encouraged.

SS07

Co-chairs: SILVA, T (UFMG, Belo Horizonte, MG, Brasil), Vinçon-Leite, B J (LEESU/Ecole des Ponts ParisTech, França), Carvalho, L A S d (UFRJ, Rio de Janeiro, RJ, Brasil)

Title: Coupling remote sensing, modelling and in situ monitoring to support lentic ecosystems management: targeting lakes and reservoirs from Global South countries

Abstract: Lakes and reservoirs are subjected to a variety of anthropogenic pressures (urbanization, land use change, non-point pollution, insufficient sanitation …) within their catchment. Under climate change, impacts are expected to increase and therefore, intensify water quality degradation. In the Global South countries, crucial ecosystem services, such as water supply, hydroelectric energy, fisheries, and irrigation are provided mainly throughout reservoirs. Lakes/reservoirs water quality management and conservation require reliable and affordable data on their hydrodynamics and ecological characteristics. Generally, data long-term timeseries are scarce which leads to a limited monitoring frequency and spatial distribution. Sensors onboard recently launched satellite platforms have been providing imagery with spatiotemporal resolution suitable to inland waters monitoring. Satellite imagery has been proved to be effective for water quality assessment on a synoptic scale, but only for the surface layer. Still, the overpassing frequency is not suitable to track short term changes, and cloud cover can cause data gaps. On the other hand, modelling can complement satellite imagery and field monitoring by providing continuous data of the whole water body. Combining remote sensing observations, modelling approaches and in situ timeseries presents a new perspective for lentic system understanding and water quality management. This session is dedicated primarily to research carried out in Global South countries addressing in situ monitoring, remote sensing applications and/or modelling for supporting management strategies of lakes and reservoirs.

SS08

Co-chairs: MOTTA-MARQUES, D. (Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil), HAMILTON, D. (Griffith University, Austrália), FRAGOSO, R. (Universidade Federal de Alagoas, Maceio, AL, Brasil)

Title: Mathematical Modeling in Limnology: Present and Future

Abstract: Mathematical models are increasingly important tools to understand and quantify structure, function, services, and adaptive management plans for aquatic ecosystems subject to rapid environmental change. In this session, we invite authors that promote the use of models to understand single or integrated processes, ecosystem spatial and temporal dynamics, coupling between terrestrial and aquatic ecosystems, dynamics of reservoirs in series, connecting rivers, floodplain lakes, and ephemeral waterbodies, development of models, remote sensing for the calibration of models, ecosystem status and ecosystem services, modeling for adaptive management, among other topics.

SS09

Co-chairs: Sagrario, M D L A G (IIMYC-CONICET, Argentina), Wood, S ( Cawthron Institute, Nova Zelândia)

Title: Deciphering Human- and Climate-Driven Impacts on Lakes using Paleolimnological Studies

Abstract: This thematic session aims to explore the valuable insights that paleolimnological research provides in understanding the complex interplay between human activities, climate variability, and the ecological health of lakes. The long-term datasets and perspectives provided by paleolimnology can yield valuable insights into reference conditions, natural variability, help delineate drivers of decline, and aid in setting realistic restoration goals. The integration of paleolimnological data with Indigenous Knowledge and social histories is increasingly being used globally to guide effective revitalization plans. We encourage submissions that explore the intersection of paleolimnology, climate science, Indigenous Knowledge, and environmental management. We welcome presentations covering a diverse range of topics related to paleolimnology, including but not limited to: i) Innovative paleolimnological methodologies and techniques, such as sedimentary DNA, for reconstructing historical lake conditions and biological communities; ii) Case studies using multiproxy datasets to reconstruct historical changes in lake ecosystems over decades to millennia; iii) Paleolimnological research providing insights into deciphering long-term climate trends versus short-term variability; iv) Case studies that integrate paleolimnological data with Indigenous Knowledge and social histories; v) Successful integration of paleolimnological findings in lake management strategies and policy frameworks.

SS10

Co-chairs: IZAGUIRRE, I  (IEGEBA (CONICET-UBA), Argentina), SANCHEZ, M L  (IEGEBA (CONICET-UBA), Argentina), Chaparro, G  (IEGEBA (CONICET-UBA), Argentina)

Title: Landscape limnology

Abstract: This session focuses on the influence of factors acting at the landscape scale on water bodies and their communities. The components of the terrestrial, aquatic and anthropic environments are included, as well as their interactions. Aspects related to the management of water bodies are also considered. Studies may include extensive databases, use of remote sensing tools, GIS, and modeling.

SS11

Co-chairs: TANIWAKI, R (Universidade Federal do ABC, Santo André, SP, Brasil), MORETTI, M S (Universidade Vila Velha, Vila Velha, ES, Brasil), SAITO, V S (Universidade Federal de São Carlos, São Carlos, SP, Brasil)

Title: Land-Use Changes on Neotropical Streams: Impacts and Scientific Advances

Abstract: Stream ecosystems in the neotropics have been significantly impacted by various anthropogenic activities, particularly related to land-use change, such as deforestation, agricultural intensification, urbanization, and mining. These activities have had profound effects on the delicate balance of these ecosystems, which can comprise over sixty percent of the entire drainage network. To mitigate the damage and recover these vital ecosystems, it is crucial to gain a comprehensive understanding of their dynamics and explore potential solutions. The primary objective of this thematic session is to foster collaboration among researchers studying the effects of land-use on stream ecosystems in the Neotropics. By bringing together experts from different biomes, we aim to achieve four main goals: (i) Establish a research community dedicated to sharing information and insights from ongoing studies in various regions; (ii) Develop a standardized proposal to evaluate stream ecosystem dynamics across different biomes, creating a cohesive framework for future research; (iii) Produce a comprehensive scientific paper that reviews the principal effects of land-use on various aspects of stream ecosystems in the neotropics, including biodiversity, water quality, biogeochemistry, and ecological processes and (iv) Facilitate discussions surrounding the latest advances and innovative techniques for assessing and restoring stream ecosystems in the neotropics. By accomplishing these goals, we can pave the way for more effective conservation and restoration efforts, safeguarding the biodiversity and ecological integrity of neotropical stream ecosystems. Through collaboration and knowledge exchange, we can foster sustainable practices that protect these vital habitats for future generations.

SS12

Co-chairs: Barbosa, P (UQAM, Canadá), Peifer, M (UQAM, Canadá), Barros, N (UFJF, Juiz de Fora, MG, Brasil) Knaap, J V D (Radboud University, Holanda), Paranaiba, J R (Radboud University, Holanda), Struik, Q (Radboud University, Holanda)

Title: Greenhouse gases emission and carbon sequestration in aquatic ecosystems: Unraveling drivers, magnitude and uncertainties

Abstract: Inland waters, such as ditches, aquaculture facilities, reservoirs, and lakes are important contributors of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) to the atmosphere. At the same time, they also store substantial amounts of organic carbon in their sediments. Greenhouse gas (GHG) emissions from these systems primarily stem from the decomposition of organic material from soils and vegetation, and emissions as well as carbon burial tend to occur heterogeneously in space and time. However, these space-time variations are often not captured due to infrequent point-based measurements, missing both hot and cold spots and/or moments. Hence, understanding the spatiotemporal variations of emissions and carbon sequestration is paramount for generating robust estimates and reducing existing uncertainties. Improving insights into the magnitude and drivers of emissions and burial as well as insights into optimal measurement strategies are crucial for informed environmental management and implementation of mitigation strategies, given that these environments hold significance in the global carbon and nitrogen cycles. Hence, we welcome speakers who are working on GHG emissions and carbon sequestration that consider either or both spatial and temporal aspects, spanning from local- to global-scale studies. By bringing together experts in this field, we aim to stimulate discussions and advance our comprehension of the role that aquatic environments play in our changing planet.

SS13

Co-chairs: Chorus, I (IGB, Alemanha), Tammeorg, O (Faculty of Biological and Environmental Sciences, University of Helsinki, Finlândia), Paerl, H (University of North Carolina-Chapel Hill, Estados Unidos)

Title: Cyanobacteria; Nutrients; Control: from Science to Management

Abstract: Controlling cyanobacterial blooms is a primary target for lake water quality management. While success has been achieved for some lakes in which concentrations of P have sufficiently declined, in many waterbodies concentrations of N have remained high or are even increasing. Also, the experience accumulating with measures focusing on P shows that particularly for shallow lakes, achieving sufficiently low TP concentrations to control cyanobacterial blooms can be challenging, and cases of eutrophication control via achieving N-limitation are rare. For planning effective restoration measures, management needs science to provide an understanding of (i) nutrient concentration targets to control blooms, including for N, (ii) criteria for focusing additional nutrient reduction measures on P or on N where those addressing both nutrients are insufficient, (iii) conditions under which only or chiefly reducing P loading can lead to excess dissolved N fertilising blooms downstream, (iv) conditions, including hydrophysical, under which blooms are likely/unlikely based on traits of taxa that determine dominance of cyanobacteria and (v) time spans to expect both for restoration responses of in-lake nutrient concentrations to reduced external loads as well as for responses of phytoplankton to reduced in-lake nutrient concentrations (including conditions causing resilience). In this session, we welcome contributions to these topics, i. e. contributions that help clarify nutrient management for mitigating eutrophication and blooms, that address inconsistent messages and controversy (particularly regarding the role of N), that identify knowledge gaps and areas of uncertainty as well as further scientific research needs, or that propose new methods and approaches.

SS14

Co-chairs: LURLING, M (Wageningen University, Holanda), Spears, B (UK Center for Ecology & Hydrology, Grã-Bretanha (Reino Unido)), Manzi, M (UERJ, Rio de Janeiro, RJ, Brasil)

Title: Lake restoration – controlling eutrophication

Abstract: The SIL working group on Lake Restoration invites all colleagues working on restoration of eutrophic lakes, ponds and reservoirs to participate in this thematic session. Contributions may cover all aspects of lake restoration ranging from testing measures to mitigate eutrophication and/or harmful algal blooms in controlled conditions to whole lake interventions and stakeholder interactions. We welcome examples of restoration sustainable innovations supporting multiple benefit classes including (not exclusively) nutrient recovery, harmful algal bloom control, renewable energy generation, reducing greenhouse gas emissions etc. 

SS15

Co-chairs: Zadereev, E.  (Krasnoyarsk Research Center, Institute of Biophysics, Russia, Federação Russa), Costa, D  (Federal University of Rio Grande do Norte, Natal, RN, Brasil), Beklioglu, M  (Middle East Technical University, EKOSAM and Limnology Laboratory, Biological Sciences Dept. Üniversiteler Mahallesi, Turquia), Cunillera-Montcusí, D  ( Institute of Aquatic Ecology, Centre for Ecological Research, Budapest, Hungary), Hungria); Fernandes, R T V  (Federal University of Semi-Arid, Mossoró, RN, Brasil), Martins, M V A  (State University of Rio de Janeiro, Rio de Janeiro, RJ, Brasil)

Title: Ecosystem structure and function along the saline continuum: from freshwaters to hypersaline inland waters

Abstract: For years, studies on freshwater and saline ecosystems were partially disconnected. In our day’s salinization has emerged as a major driver in aquatic systems that can unify both approximations to salinized inland waters. While freshwater scientists are often concerned with small fluctuations of salinity that may affect the ecosystem structure and function, explorers of hypersaline waters test the limits of life tolerance to extreme concentrations of salt. However, these two systems should be considered as states along the same salinity continuum having different ecological and evolutionary contexts. Salinity as a major driver strongly affects species diversity, food web structure, ecosystem functions and aquatic ecosystems contribution to people. Nowadays, salinization is accepted as a global problematic, but despite its severity, not much attention has been paid to saline compared to freshwater ecosystems and thus our understanding is still limited. Major ecological and socio-economic threats are linked to and caused by salinization. That is why in this session we will focus not only on the causes of freshwater salinization, but also on the effects of drivers of salinization such as climate change, land use, and anthropogenic activities, and the response of biota and ecosystems to these effects and to salinity as a main driver of change. Also, we will discuss the dynamics and ecological processes in hypersaline aquatic ecosystems, as well as the potential alternatives for their management. Work is also expected on the analysis of physical-chemical parameters of the brine and sediments. All contributions that focus on impacts of salinity and tries to advance in its understanding with independence of the system (e.g. lotic, lentic, temporary), approach (e.g. diversity, functional, biogeochemical) and scale (e.g. local, regional, global) will be considered.

SS16

Co-chairs: CASTRO, D (UFMG, Belo Horizonte, MG, Brasil), Callisto, M (UFMG, Belo Horizonte, MG, Brasil), Paprocki, H (PUC-MG, Belo Horizonte, MG, Brasil), Silva, F (Tema Ambiental / Puc Minas, Belo Horizonte, MG, Brasil).

Title: Challenges of Aquatic Biodiversity and Conservation Strategies in Mined Environments: Exploring Impacts and Pathways to Recovery

Abstract: Mining activities have induced profound impacts on aquatic ecosystems, including the input of heavy metals, sediment loading, deforestation, and road construction. These activities have significantly altered aquatic biodiversity in Neotropical waterbodies, disrupting community structure, food chains, and ecosystem services. This session aims to evaluate mining impacts on aquatic biodiversity and propose effective pathways for rehabilitation, with a focus on responsible resource management. By discussing the interplay between mining and aquatic ecosystems, researchers and practitioners can explore management practices, monitoring strategies, and scientific information to achieve sustainable mining while mitigating adverse effects on water quality and ecosystem services. The session will also highlight innovative conservation and rehabilitation methodologies currently in progress. Additionally, the role of limnology, especially in the aftermath of mining tailings dam collapses, is crucial for the recovery and monitoring of affected aquatic ecosystems. Limnologists have contributed significantly to monitoring and recovery initiatives, utilizing an extensive environmental database to restore biogeochemical processes, hydrobiological community structures, fluvial dynamics, and hydrogeology within these ecosystems. It is imperative to deliberate upon and present these outcomes and strategies at the Limnology Congress, as limnology forms the bedrock for the reparation of aquatic ecosystems in the wake of mining-induced disturbances. This integrated approach fosters a more harmonious coexistence between mining endeavors and aquatic biodiversity.

SS17

Co-chairs: BARBOSA, F (Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil), Pujoni, D G F (Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil), Moura, K A (Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil)

Title: Contributions from the Brazil-LTER /PELD and REC-Rio Doce projects to the restoration of the Rio Doce basin, Southeast Brazil: A Legacy

Abstract: The mining sector has been under severe criticism by worldwide society after the recent disasters, among which the Fundão Dam collapse stands at the top, considering the 19 casualties and the associated impacts along the Doce river basin.  Supported by governmental projects we could establish a network of measurements and samplings to evaluate the impacts of this disaster on water quality and selected communities of the aquatic biota (project Rec-Rio Doce), namely Archaea/Bacteria, Phyto- and Zooplankton, fishes, together with the organic matter cycling in selected ecosystems. The other project- the Brazil-LTER/PELD has been running since January 2000 focusing on the lake system of the middle Rio Doce basin and provided information on the aquatic and terrestrial communities and ecosystems functioning long before the disaster. The Rec-Rio Doce was a 4-year project (2019-2022) was developed in selected points along two sub-basins: Santo Antonio (non-affected by the disaster) and Piranga rives (partially affected), impacted both by numerous sources of pollution. These projects provided important information on water quality and aquatic communities allowing us to know on their structure and functioning and on the changes resulted from the impacts of the tailings. These results are an important source of information on the conditions of the ecosystems and constitute a knowledge legacy that can provide guidance for the restoration efforts along the watershed.  The objective of this session is to present the main results on the functioning of these ecosystems (rivers and lakes), pointing out the impacts after the Fundão Dam collapse.

SS18

Co-chairs: Cunillera-Montcusí, D (Institute of Aquatic Ecology, Centre for Ecological Research, Budapest, Hungary, Hungria), Horvath, Z (Institute of Aquatic Ecology, Centre for Ecological Research, Budapest, Hungary, Hungria), Arim, M (Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional del Este (CURE), Universidad de la República, Tacuarembó s/n, Maldonado, Uruguay, Uruguai)

Title: Aquatic metacommunities: diversity patterns, assembly processes, spatial scales, and network connectivity

Abstract: Metacommunity ecology provides an overarching theory where the main local and regional drivers of community assembly can be jointly assessed. In the freshwater realm, metacommunities have specific connectivity features, either by being discrete (ponds and lakes) or connected via waterways (streams and rivers). In this session, we invite talks that address how local and regional diversity are affected by spatial, environmental, functional, or stochastic drivers, set and define the limits of metacommunities, include eco-evolutionary dynamics, or account with biotic interactions in a metacommunity framework. Aquatic conservation themed works utilizing metacommunity theory are also welcome, just as laboratory, mesocosms, field or simulation experiments. We especially encourage studies that try break the boundaries between systems (e.g., lotic vs lentic, freshwater vs saline, riverine vs estuarine, aquatic vs land, theory vs conservation) using a metacommunity perspective. Even though metacommunity theory is well sedimented in aquatic ecology, there is still a wide spectrum of new insights that the coupling between limnology and metacommunities can provide at both the theoretical and the applied levels.

SS19

Co-chairs: BRUCET, S (University of Vic & ICREA, Espanha), Trochine, C (University of Vic & INIBIOMA CONICET-Universidad Nacional del Comahue, Argentina), Meerhoff, M (Universidad de la República, Uruguai)

Title: The relevance of ponds ecosystems for the biodiversity and society in the context of global changes.

Abstract: Ponds (small standing waters varying in size from 1 m2 to about 2-5 ha in area that may be permanent or seasonal, man-made or naturally created) are the most numerous type of freshwater body on Earth and collectively occupy the greatest area. Ponds can be also biodiversity hotspots, and support many rare, endemic and threatened species and are key elements of blue landscape connectivity. Ponds also provide multiple benefits to humans including provision of water for cattle, crops and human consumption, flood mitigation, pollution amelioration, pollination and possibilities for recreation and tourism. We are also starting to understand the potential of ponds to capture carbon and the important role they could play in mitigation and adaptation to climate change. When poorly managed, however, ponds may act as sources of carbon, cyanobacteria blooms, and invasive species. Despite their ecological importance, because of their size, ponds have been less studied than large water bodies such as lakes or rivers and are also overlooked by policymakers. However, ponds are exposed to the same threats facing larger water bodies but are more vulnerable to global changes. In addition, there is insufficient knowledge on how to manage and restore ponds to maximize the resilience of ecosystems and society to climate and land use change. In this session, we welcome theoretical and empirical studies, from around the globe, on all aspects of pond biodiversity, conservation, restoration, provision of ecosystem services, as well as on the societal, economic and policy aspects related to ponds.

SS20

Co-chairs: Higuti, J (Universidade Estadual de Maringá, Maringá, PR, Brasil), Velho, L F M (Universidade Estadual de Maringá, Maringá, PR, Brasil), Martens, K (Royal Belgian Institute of Natural Sciences, Bélgica)

Title: The phytothelmata as aquatic ecosystems

Abstract: Freshwater habitats house a disproportional high part of the global biodiversity, considering the relatively small proportion of the earth’s surface they occupy. This is also known as the “paradox of freshwater”. The larger and more permanent water bodies have thus far received the bulk of research attention, leaving small and temporary aquatic habitats, although common, largely ignored in terms of biodiversity surveys and overviews of freshwater ecosystems. Cases-in-point are small water bodies held by plant structures, generally known as phytothelmata, which include tree holes, bromeliad tanks, pitcher plants, water filled coconut casks, and florescences of Heliconia. Many larval insects and several other invertebrates such as crustaceans occur, even as endemics, but also vertebrates (mostly Amphibia) are observed in phytothelms. Considering the temporal hydrodynamics of phytothelm habitats (only seasonal availability of water and short lifespan of the plants), a dynamic exchange between habitat patches is required to sustain viable populations. This explains the presence and dominance of actively dispersing insects and renders the occurrence and persistence of passive dispersers such as crustaceans in these systems intriguing. In addition, the small size of this ecosystem makes it an excellent model for of highly replicated experiments. Phytothelmata have been targeted in a variety of studies, including those on the effects of major global changes (e.g. climate change and habitat fragmentation) on biodiversity and ecosystem functioning. During the proposed symposium, several speakers will introduce the ecological concepts of phytothelmata and will illustrate the rich ecological and evolutionary adaptations of the inhabitants of such ecosystems.

SS21

Co-chairs: Walsh, E (University of Texas at El Paso, Estados Unidos), Gomes Barbosa, L ( Federal University of Paraíba, João Pessoa, PA, Brasil), Olmo, C (Girona University, Espanha)

Title: Ecology and conservation of temporary aquatic ecosystems

Abstract: Global climate change is expected to intensify drying in temporary freshwater ecosystems around the world, altering their biodiversity and functioning. Drying can cause biodiversity to decline, reducing the resilience of ecosystems facing climate change and other intensifying human pressures. Temporary lakes, wetlands, rock pools, man-made reservoirs, ponds, rivers and streams provide many ecosystem services, and understanding their biodiversity and functioning is thus critical to inform effective conservation and management strategies. Accordingly, this session will showcase the latest, most exciting limnological research exploring drying freshwaters. Our objective is to explore drying freshwaters from biological, biogeochemical, ecological, hydrological, physical and wider interdisciplinary perspectives, as well as recognizing these ecosystems as socioeconomic systems. A diverse range of drying freshwaters occur across all continents, and we seek to represent international advances made by scientists studying systems from hot, arid lands through to cold, wet countries. As their extent increases in our changing world, our multidisciplinary session will show how collaboration between global scientists and managers is transforming our understanding of temporary freshwater ecosystems and thus our capacity to manage them effectively.

SS22

Co-chairs: BARBOSA, L (Federal University of Paraiba, Areia, PB, Brasil), Ajayan, A P (Chinese Academy Sciences, Índia), Bruder, A (University of Applied Sciences and Arts of Southern Switzerland, Suíça), SANDRA POIKANE (EC Joint Research Centre, Italy), John Simaika (IHE Delft Institute for Water Education , Netherlands), Andreas Bruder (SUPSI, Switzerland)

Title: Challenges and opportunities for implementation of the global freshwater biomonitoring agenda

Abstract: Biodiversity monitoring in inland waters across the globe is improving in many aspects. These incudes: coverage of biomes, ecosystem types, and different taxonomic groups; frequency of observations; longevity of programs; and overall geographic coverage.  Yet major challenges remain both in terms of the effectiveness of individual programs and in terms of how these programs collectively contribute to achieving global biodiversity goals for inland waters at the level of ecosystems, species, and genes.  For individual programs there is a nascent demand for understanding how various socio-ecological and governance factors affect the implementation of a new policy, project, program, or intervention in real-life settings. In freshwater biomonitoring, it is not different. Developing an effective monitoring program is about learning how to select program parameters, scale up promising programs, evaluate impact, and how sustain these programs over the long term. However, ensuring that individual programs contribute to achieving global biodiversity goals requires linking these programs to conceptual frameworks and global infrastructures and initiatives developed to support global goals. In this special session, we intend to share experiences about the challenges and opportunities to biomonitoring programs across the globe, at all scales. We also see this as a great opportunity to explore how disparate programs across the world can support globally agreed biodiversity indicators for the Global Biodiversity Framework and thus contribute to achieving global biodiversity targets. We invite the participants of SIL 2024 to share their experiences with us in this special session with the potential to bridge the evidence-into-action gap.

SS24

Co-chairs: CARDOSO, S (Federal University of Juiz de Fora – UFJF, Juiz de Fora, MG, Brasil), Costa, N B (Group for Interuniversity Research in Limnology (GRIL), Institut national de la recherche scientifique – Eau Terre Environnement (INRS-ETE), Canadá), Graco-Roza, C (Lammi Biological Station, University of Helsinki, Finlândia)

Title: Plankton diversity in face of anthropogenic changes

Abstract: Over the past centuries, human-induced changes to the biosphere have resulted in the degradation of inland waters in multiple ways. Habitat destruction, ecosystem fragmentation, nonpoint source pollution, artificial eutrophication, climate change, and the introduction of invasive species, have all posed significant threats to aquatic biodiversity and the ecological services it provides. To address these challenges, it is imperative to investigate how anthropogenic pressures impact aquatic organisms, especially the planktonic community, which are at the basis of aquatic food webs. Assessing the degree of anthropogenic pressures on plankton diversity and composition may provide valuable insights to inform and guide conservation efforts and priorities in inland waters. This thematic session aims to deepen our understanding on how distribution patterns and plankton taxonomic, functional, and molecular diversity respond to the direct and indirect effects of a variety of human activities within watersheds. We expect the thematic session will raise discussions of current primary threats to planktonic diversity and the ecosystem services they provide, and the information gathered can be integrated into ecological models to predict biodiversity loss in freshwater ecosystems.

SS25

Co-chairs: SOLAR, R (UFMG, Belo Horizonte, MG, Brasil), Callisto, M (UFMG, Belo Horizonte, MG, Brasil), Hughes, R (Oregon State University, Estados Unidos)

Title: South American Spatially Extensive Biological Assessments: Gaps & Opportunities

Abstract: The ecological conditions of aquatic ecosystems in South America are changing rapidly in response to a growing population, hydropower development, land use change, and climate heating. Currently there are, or have been, at least 5 spatially extensive assessments in South America (Eastern Brazilian Amazonia, Brazilian Cerrado, Bolivia, Rio das Velhas, & Rio Doce) that we know of. Similar spatially extensive bioassessments are occurring on all continents but Antarctica, and we invite those scientists and managers so that we all can learn from their successes and failures from their experiences. This session seeks to examine commonalities amongst those research programs (and others), determine major research gaps amongst them, and determine feasible opportunities for closing those gaps. Our goal is to arrive at standard, cost-effective methods for a standard assessment of the ecological condition of South American aquatic ecosystems in hopes of spotting and mitigating their deterioration.

SS27

Co-chairs: Wood, S (Cawthron, Nova Zelândia), Thomson-Laing, G (Cawthron, Nova Zelândia), Schallenberg, L (Cawthron, Nova Zelândia)

Title: Advancing and implementing environmental DNA and RNA methods for assessing, monitoring and managing freshwater ecosystems

Abstract: The application of environmental DNA/RNA (eDNA/eRNA) methods for biodiversity monitoring has expanded greatly in the past decade. Technological advances have driven the development of rapid and cost-effective approaches to describe biological communities across all freshwater systems. The detection of eDNA/eRNA in water, sediment, biofilms, and other sample types can reveal critical information about the status of freshwater communities, both past and present. A recent wave of studies have demonstrated the utility of eDNA/eRNA methods and their potential for detecting anthropogenic impacts on biodiversity in iour rapidly changing freshwater ecosystems. However, the immediate implementation of these tools is currently limited by the lack of best practice methods that would enable adoption across research, governments, private sectors, and community groups. This thematic session will highlight the application of eDNA/rRNA technologies in freshwater environments, exciting innovations in molecular methods and recent uses of fit-for-purpose eDNA/eRNA-based tools for monitoring and managing freshwater ecosystems. We welcome presentations that focus on the application of eDNA/eRNA in freshwater systems, methodological developments, practical solutions for sampling, sample processing, and analytical workflows, as well as fit-for-purpose eDNA/eRNA-based monitoring tools, including field-deployable technologies that support point-of-need research or citizen science applications.

SS29

Co-chairs: Sarma, N (UNAM, Mexico), Sarma, S S S (UNAM, Mexico), ANDRE PADIAL (UNIVERSIDADE FEDERAL DO PARANÁ, Curitiba, PR, Brasil), JULIAN OLDEN (WASHINGTON UNIVERSITY, United States), Frank Rahel (University of Wyoming, United States)

Title: Non-native taxa in freshwater ecosystems

Abstract: Non-native taxa have been sighted in freshwater ecosystems for many different places all over the world. For most cases, the non-native species get eliminated in course of time or cause no visible impact on local communities.  However, in recent years, non-native species have become invasive. The presence of invasive species is thus one of the major threats that freshwater systems face. Invasive taxa are being recorded in freshwater ecosystems across the world, presenting a risk to native communities. This phenomenon can be attributed to several factors including increased globalization, trade, climate change, and the deterioration in water quality. The impact of these non-native organisms requires a detailed knowledge of the species richness at the study site, which, in turn, demands an investment in taxonomy training of students. A continuous effort in field monitoring and experimental studies are essential in order to evaluate the impact of these organisms. Several studies indicate that it is difficult to eradicate an invasive species once it is established in the ecosystem. The main objective of this thematic session is to learn more about the presence of non-native taxa in freshwater ecosystems around the world and share experiences regarding their control strategies.

SS31

Co-chairs: BOTREL, M (McGill University, Canadá), Velthuis, M (Radbout University, Holanda), Hilt, S (IGB Berlin, Alemanha)

Title: Scientific and societal challenges of macrophyte decline and recovery in inland waters

Abstract: Macrophytes are key elements of inland waters and support a variety of ecosystem functions and services including habitat provision, nutrient removal and carbon processing. Excessive nutrient loading and potentially other stressors such as warming, browning, pesticide input or invasive herbivores have resulted in macrophytes decline in many lakes and lowland rivers worldwide. In recent decades, a number of general concepts have been developed, such as regime shifts between alternative equilibria, the occurrence of crashing states or boom-bust cycles of invasive species. Yet we are still far from understanding the complex patterns and causes of spatial and temporal changes in macrophyte communities. Mechanistic explanations, especially of synergies between several stressors, are still a challenge and our knowledge on the role of e.g. parasites is scarce despite their known involvement in seagrass declines in marine environments. Macrophyte recovery is often delayed in response to reduced nutrient loading and several restoration techniques including planting have been tested to facilitate this process. In contrast, macrophyte mass developments can occur and are often considered a nuisance when interfering with human activities. Management measures, however, usually don’t balance people’s perception of macrophyte abundance with the potential consequences of macrophyte removal for water bodies. In this session, we aim at discussing major challenges in freshwater macrophyte research and welcome contributions with a focus on causes, patterns, measures and societal perception of freshwater macrophyte decline and recovery at all spatial and temporal scales. We also welcome work on the role of macrophytes on ecosystem functioning and service provisioning.

Twitter handle: @morganbotrel @Mandy_Velthuis

SS32

Co-chairs: SCOARIZE, M M R (Universidade Estadual de Maringá e Instituto BiodiverCidade, Maringá, PR, Brasil), PRADO, C M (Pastoral da Ecologia e Meio Ambiente, Maringá, PR, Brasil), BENEDITO, E (Universidade Estadual de Maringá, Maringá, PR, Brasil), MARCOS CALLISTO (Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil), Robert Mason Hughes (Oregon State University, United States), Juliana Silva França (Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil)

Title: Environmental education and outreach

Abstract: Environmental education (EE) is vital to tackle climate change issues, such as flood events and warming water. Traditional and innovative EE and outreach approaches are both important to raise public awareness. The huge challenge imposed by extreme whether events, aquatic ecosystem degradation, and mass freshwater species extinction followed by a decrease in ecosystem services jeopardise aquatic environmental health. Thus, there is a need to develop EE and outreach initiatives. The pivotal role of regional communities in conservation has been vastly corroborated, however, their participation in research has been growing through citizen science. Moreover, research and conservation rely on public support for passing legislation both at the local and national levels. Therefore, projects that foster community participation strengthen the relationship between scientists and regional communities, bridging the gap between society sectors. Thus, increasing the likelihood of environmental conservation success. The goals of this thematic session is to: present current projects of EE and outreach with aquatic ecosystems and dialogue about the perspectives for the near future; present citizen science related to aquatic environments; discuss new possibilities for approaching EE in the digital media; integrate the socio-cultural aspects of water to research; welcome presentations on experiments, reviews, sampling studies and all the diverse ways of producing science.

SS33

Co-chairs: Mazzeo, N (Instituto SARAS, Uruguai), Attayde, J (Universidad Federal do Rio Grande do Norte, Brazil), Pahl-Wostl, C (Universität Osnabrück, Germany)

Title: Resilience Capacity (Adaptation and Transformation) of Water Management and Governance Systems

Abstract: Thematic session about the analysis and construction of resilience capacity (adaptation + transformation) of water management and governance systems. Water management and governance present considerable challenges at multiple spatial scales (global to local) due to various global changes, greater complexity of associated governance systems (multi-actor and multi-level networks), considerable modifications in human valuation systems, and the relationship man-nature. This section will include contributions about the analysis and construction of assets (social, political, and ecosystem dimensions); organizational design of the networks of public-private actors involved; learning mechanisms; flexibility; power dynamics, and agency in the network of actors. The co-management, co-production, and citizen science cases constitute examples to consider.

Twitter handle: Water management and governance