XX Congress of the Iberian Association of Limnology (AIL-2020) III Iberoamerican Congress of Limnology (CIL-2020) ONLINE CONGRESS 26-29 October Murcia (Spain) XX Congress of the Iberian Association of Limnology (AIL-2020) III Iberoamerican Congress of Limnology (CIL-2020) Between 26nd and 29th of October 2020 and honouring the theme of the congress, “Limnology in a changing Limnology world”, we will celebrate in a virtual form from Murcia (Southeast of Spain) the XX Congress of the Iberian Association of Limnology (AIL-2020). We highlight that in a the congress is the result of a fruitful coordination between the Iberian Association of Limnology (AIL) and the Iberoamerican Associations of Limnology. changing Thus, this congress is will be also the III Iberoamerican Congress of Limnology (CIL-2020). This event will provide a valuable opportunity, although in a virtual way, for the exchange of knowledge and experiences world among Iberian and Ibero-American limnologists. One of the main aims of this meeting is to discuss the new scientific knowledge that will be useful to improve the management and conservation of inland aquatic ecosystems (from lakes to deltas and estuaries, through rivers and wetlands). This information will be discussed under a global change scenario and considering new models of man-nature cooperation. Under the slogan “Limnology in a changing world”, the congress aims to discuss key issues to manage these ecosystems that despite being of high importance for humans, are subjected to increasing human pressures and impacts. The Iberian Southeast is one of the most arid regions in Europe. Inland aquatic ecosystems in this area acquire a great importance for their uniqueness at European scale. Arid environments offer a wide variety of aquatic ecosystems, hosting an extraordinary biodiversity. The functioning of such ecosystems is determined by extreme biophysic conditions, especially at the terrestrial-aquatic interface. Despite its conservation value, the aquatic ecosystems of this region are highly threatened by the high degree of anthropic alteration and global change. We invite you to participate in this unique event to share experiences, to coordinate works and advance in the knowledge of aquatic ecology, thus contributing to a more sustainable inland aquatic ecosystem management. In this sense, we feel that the involvement of water managers and interested technicians and consultants is essential as a bridge The Congress logo is an original idea between scientific knowledge and society. For this from Antonio José García Cano. reason, our invitation is extended to this collective. 2 PARTNERS Partners & Sponsors SPONSORS 3 President Organizing Mª Rosario Vidal-Abarca Gutiérrez secretary committee Rosa Gómez Cerezo treasurer Mª del Mar Sánchez-Montoya Vocals Mª Luisa Suárez Alonso Josefa Velasco García Andrés Millán Sánchez David Sánchez-Fernández Mercedes Guerrero Brotons Néstor Nicolás Ruiz María Botella Cruz Juana María Mirón Gatón Antonio J. García-Meseguer Zeus Freixinos Campillo 4 Alberto Rodrigues Capitulo asociación argentina de limnología Andrea Encalada asociación ecuatoriana de limnología Andrés Millán Sánchez uniVersidad de murcia Arturo Elosegui uniVersidad del País Vasco Biel Obrador uniVersitat de Barcelona Claudia Pascoal uniVersidade do minho Cristina Canhoto uniVersidade de coimBra Daniel von Schiller uniVersitat de Barcelona David Sánchez-Fernández uniVersidad de murcia Eugenia Martí Scientific ceaB-csic, Blanes Francisco Xavier Quintana Pou uniVersitat de girona committee Isabel Muñoz uniVersitat de Barcelona Jorge Ciros asociación mexicana de limnología Jorge Nimptsch sociedad chilena de limnología Jose Attayde asociación Brasileña de limnología Josefa Velasco García uniVersidad de murcia Margarita Menéndez López uniVersitat de Barcelona Maria Joao Feio uniVersidade de coimBra María Luisa Suárez Alonso uniVersidad de murcia Nelson Aranguren Riaño uniVersidad Pedagógica y tecnológica de colomBia Núria Bonada uniVersitat de Barcelona Núria Catalán united states geological surVey. reston, ca, us Paloma Alcorlo Pagés uniVersidad autónoma de madrid Pepe Barquín uniVersidad de cantaBria Rui Cortés uniVersidade de trás-os-montes e alto douro Toni Camacho uniVersidad de Valencia Verónica Ferreira uniVersidade de coimBra 5 Nancy B. Grimm Arizona State University, Tempe, Arizona, USA The need for positive thinking in times of crisis: co-producing sustainable future scenarios and nature- based solutions for cities We are in a time of accelerating global crises, and nowhere is this more evident than in cities. Because they concentrate people and infrastructure and are often Invited found along coasts and rivers or in arid areas, cities are particularly vulnerable to the impacts of extreme, weather- related events. Population aggregation provides many benefits to society, including enhanced collective creativity Speakers and economies of scale, but among the detriments is rampant spread of disease, as illustrated by the current coronavirus pandemic. Facing this reality, building resilience for our cities requires diverse strategies that integrate social (S), ecological (E), and technological/built (T) components in a systems (S) approach. It also requires outside-the-box thinking and an emphasis on positive futures. I will present a conceptual framework for SETS integration and an approach for co- creating positive future visions (scenarios) developed and applied in nine North and Latin American cities. Examples from the scenario development process will highlight diverse strategies that address unique challenges across the cities. Closer examination of strategies for flooding will show common approaches across diverse cities. And finally, emergent themes, goals, and strategies will be examined in the context of the pandemic, asking how social, ecological, and technological systems respond and fare under this very different type of threat. 6 Mariana Meerhoff Raquel Mendonça Departamento de Ecología y Gestión Ambiental. Federal University of Juiz de Fora. Universidad de la Republica. Uruguay. Brasil. Climate warming decreases ecosystem Carbon footprint of reservoirs – resilience against eutrophication; lessons learned from tropical systems what about the other way round? Climate change affects a myriad of processes that Reservoirs play key social and economic roles as source affect water quality and ecosystem functioning, from the of water and hydropower. There are currently about watershed to the organism scale. Climate change interacts 38,000 dams around the world and many new ones are with other anthropogenic stressors, in often in a synergistic planned especially in the tropics, affecting landscape- way, leading to a decrease in ecosystem resistance and scale greenhouse gas emissions and the carbon cycle. resilience to external perturbations. In particular, there Particularly methane emission is of major concern, is a growing consensus on the idea that warming, in since the transformation of previously fixed atmospheric particular, enhances both eutrophication and its symptoms, carbon dioxide to methane implies a 34-fold amplification promoting cyanobacterial blooms among others. in global warming potential. However, reservoirs also trap large amounts of fluvial sediments containing It has been hypothesized that eutrophication organic carbon in a burial-prone environment, thereby can also enhance climate warming, although the enhancing basin-scale organic carbon sequestration. partial evidence is incipient and often contradictory In my talk, I will discuss some of the latest advances due to the different processes involved. towards quantifying the carbon footprint of reservoirs, showing the research that my group has developed over In this presentation, I will review the main processes the past years. We have demonstrated, for example, that are affected by climate change that lead to a that reservoirs sequester terrestrial organic carbon with weakening of ecosystem resistance and resilience higher efficiency than other depositional environments. against nutrient enrichment, and the growing evidence We also confirmed that methane emission through on the interaction between eutrophication and its bubbles, an emission pathway largely overlooked, symptoms on the carbon cycle and the climate system. can account for most of a reservoir greenhouse gas emission. It is clear that the ultimate carbon footprint of a reservoir is strongly dependent on the characteristics of its project and on the properties of its catchment. Based on this, I will also discuss ideas of how strategic dam planning can reduce greenhouse gas emission. 7 Luisa Orsini Cayetano Gutiérrez Cánovas Departament de Biologia Evolutiva, School of Biosciences,University Ecologia i Cièncias Ambientales. of Birmingham. UK. Universitat de Barcelona. España. Back to the future with the Multiple stressor impacts on freshwater evolutionary time machine ecosystems: biodiversity responses and functional consequences Human-driven environmental change has been associated Freshwaters ecosystems are exposed to multiple drivers with loss of biodiversity and ecosystem services. Yet, we of change and stress, which threaten their biodiversity struggle to mitigate this loss and to regulate pollution. This and their vital contribution to people’s welfare and global is because the links between abiotic environmental change biogeochemical cycles. As a consequence, to improve and biodiversity are dynamic and complex. Because of and adapt biomonitoring, management