Percorrer por autor "Grossart, Hans-Peter"
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- Can space-for-time-substitution surveys represent zooplankton biodiversity patterns and their relationship to environmental drivers?Publication . Stockwell, Jason; Ivanick, Lia; Chiapella, Ariana; Vichi, Cecilia; Grossart, Hans-Peter; Zagarese, Horacio; Diovisalvi, Nadia; Odriozola, Mariana; Gideon, Gal; Geraldes, Ana Maria; Christoffersen, Kirsten Seestern; Sarvala, Jouko; Blank, Kätlin; Beklioğlu, Meryem; Kainz, Martin; Bruel, Rosalie; Ger, Kemal Ali; Matsuzaki, Shin-Ichiro; Khan, Samiullah; Nejstgaard, Jens; Znachor, Petr; Seda, Jaromír; Obertegger, Ulrike; Salmaso, Nico; García-Girón, Jorge; Leoni, Barbara; Jeppesen, Erik; Tavşanoğlu, Ülkü Nihan; Rusanovskaya, Olga O.; Tartarotti, Barbara; Dur, Gaël; Kuczyńska-Kippen, Natalia; Dondajewska-Pielka, Renata; Eyto, Elvira de; Thackeray, Stephen; Garcia de Souza, Javier R.; Rusak, James A.; Moe, Jannicke; Figary, Stephanie; May, Linda; Gunn, Iain; Doubek, Jonathan; Symons, Celia C.; Burnet, Sarah; Lepori, Fabio; Alcocer, Javier; Fernández, Rocío; Oseguera, Luis A.; Verburg, Piet; Fontanarrosa, María SoledadSpace-for-Time-Substitution surveys (SFTS) are commonly used to describe zooplankton community dynamics and to determine lake ecosystem health. SFTS surveys typically combine single point observations from many lakes to evaluate the response of zooplankton community structure and dynamics (e.g., species abundance and biomass, diversity, demographics and modeled rate processes) to spatial gradients in hypothesized environmental drivers (e.g., temperature, nutrients, predation), in lieu of tracking such responses over long time scales. However, the reliability and reproducibility of SFTS zooplankton surveys have not yet been comprehensively tested against empirically-based community dynamics from longterm monitoring efforts distributed worldwide. We use a recently compiled global data set of more than 100 lake zooplankton time series to test whether SFTS surveys can accurately capture zooplankton diversity, and the hypothesized relationship with temperature, using simulated SFTS surveys of the time series data. Specifically, we asked: (1) to what degree can SFTS surveys capture observed biodiversity dynamics; (2) how does timing and duration of sampling affect detected biodiversity patterns; (3) does biodiversity ubiquitously increase with temperature across lakes, or vary by climate zone or lake type; and (4) do results from SFTS surveys produce comparable biodiversity-temperature relationship(s) to empirical data within and among lakes? Testing biodiversity-ecosystem function (BEF) relationships, and the drivers of such relationships, requires a solid data basis. Our work provides a global perspective on the design and usefulness of (long-term) zooplankton monitoring programs and how much confidence we can place in the zooplankton biodiversity patterns observed from SFTS surveys.
- Data descriptor: a European multi lake urvey dataset of environmental variables, phytoplankton pigments and cyanotoxinsPublication . Mantzouki, Evanthia; Campbell, James; Loon, Emiel van; Visser, Petra; Konstantinou, Iosif; Antoniou, Maria G.; Giuliani, Grégory; Machado-Vieira, Danielle; Oliveira, Alinne Gurjão; Maronić, Dubravka Špoljarić; Stević, Filip; Real, Monserrat; Latour, Delphine; Çınar, Şakir; Romans, Elvira; Noguero-Ribes, Jordi; Duque, David Parreño; Fernández-Morán, Elísabeth; Úbeda, Bárbara; Gálvez, José Ángel; Soria, Juan Miguel; Fonvielle, Jeremy; Marcé, Rafael; Catalán, Núria; Pérez-Martínez, Carmen; Carey, Cayelan C.; Žutinić, Petar; Çapkın, Kadir; Ramos‐Rodríguez, Eloísa; Cillero-Castro, Carmen; Moreno-Ostos, Enrique; Blanco, José María; Rosińska, Joanna; Torokne, Andrea; Rodríguez, Valeriano; Montes-Pérez, Jorge Juan; Palomino, Roberto L.; Rodríguez-Pérez, Estela; Paerl, Hans W.; Carballeira, Rafael; Vitonytė, Irma; Hansson, Lars-Anders; Urrutia-Cordero, Pablo; Raposeiro, Pedro M.; Özen, Arda; Cesur, Mehmet; Bravo, Andrea G.; Plenković-Moraj, Anđelka; Buck, Moritz; Colom-Montero, William; Mustonen, Kristiina; Pierson, Don; Aleksovski, Boris; Bulut, Cafer; Grossart, Hans-Peter; Yang, Yang; Verspagen, Jolanda M.H.; Domis, Lisette N. de Senerpont; Seelen, Laura; Bilgin, Fuat; Teurlincx, Sven; Szymański, Daniel; Karan, Tünay; Demir, Nilsun; Haande, Sigrid; Avagianos, Christos; Beklioğlu, Meryem; Bláha, Luděk; Filiz, Nur; Levi, Eti E.; Iskin, Uğur; Bezirci, Gizem; Tavşanoğlu, Ülkü Nihan; Çelik, Kemal; Kruk, Marek; Fránková, Markéta; Kaloudis, Triantafyllos; Skjelbred, Birger; Özhan, Koray; Karakaya, Nusret; Koçer, Mehmet Ali Turan; Yilmaz, Mete; Geriš, Rodan; Maraşlıoğlu, Faruk; Vasconcelos, Vítor; Uysal, Rahmi; Köker, Latife; Triantis, Theodoros; Budzyńska, Agnieszka; Grabowska, Magdalena; Akçaalan, Reyhan; Albay, Meriç; Alp, Mehmet Tahir; Özkan, Korhan; Sevindik, Tuğba Ongun; Tunca, Hatice; Önem, Burçin; Richardson, Jessica; Zervou, Sevasti-Kiriaki; Morais, João; Christoffersen, Kirsten Seestern; Karpowicz, Maciej; Goldyn, Ryszard; Edwards, Christine; Bergkemper, Victoria; O'Leary, Sarah; Beirne, Eilish; Cromie, Hannah; Ibelings, Bastiaan W.; Hiskia, Anastasia; Warming, Trine Perlt; Feldmann, Tõnu; Laas, Alo; Chmura, Damian; Vale, Micaela; Kozak, Anna; Panksep, Kristel; Tuvikene, Lea; Kangro, Kersti; Häggqvist, Kerstin; Kobos, Justyna; Salmi, Pauliina; Arvola, Lauri; Fastner, Jutta; Straile, Dietmar; Nawrocka, Lidia; Rothhaupt, Karl-Otto; Camacho, Antonio; Gkelis, Spyros; Panou, Manthos; McCarthy, Valerie; Szeląg-Wasielewska, Elżbieta; Perello, Victor C.; Gonçalves, Vítor Manuel da Costa; Obertegger, Ulrike; Boscaini, Adriano; Flaim, Giovanna; Salmaso, Nico; Yağcı, Abdulkadir; Jakubowska-Krepska, Natalia; Cerasino, Leonardo; Koreivienė, Judita; Karosienė, Jūratė; Kasperovičienė, Jūratė; Domek, Piotr; Savadova‐Ratkus, Ksenija; Verstijnen, Yvon; Mazur-Marzec, Hanna; Alcaraz-Párraga, Pablo; Udovič, Marija Gligora; Wilk-Woźniak, Elżbieta; Krstić, Svetislav; Krztoń, Wojciech; Walusiak, Edward; Gagala‐Borowska, Ilona; Mankiewicz-Boczek, Joana; Toporowska, Magdalena; Pawlik-Skowronska, Barbara; Tsiarta, Nikoletta; Drastichova, Iveta; Picazo, Antonio; Niedźwiecki, Michał; Pęczuła, Wojciech; Napiórkowska-Krzebietke, Agnieszka; Dunalska, Julita; Nemova, Hana; Sieńska, Justyna; Fakioglu, Özden; Kwasizur, Kinga; Messyasz, Beata; Lürling, Miquel; Rochera, Carlos; Pełechata, Aleksandra; Pełechaty, Mariusz; Kokocinski, Mikolaj; Madrecka‐Witkowska, Beata; Kostrzewska-Szlakowska, Iwona; Frąk, Magdalena; Bańkowska-Sobczak, Agnieszka; Wasilewicz, Michał; Soylu, Elif Neyran; Chomova, Lucia; Santamans, Anna C.; Maliaka, Valentini; Ochocka, Agnieszka; Pasztaleniec, Agnieszka; Jasser, Iwona; Geraldes, Ana Maria; Leira, Manel; Hernández, Armand; Pfeiffer, Tanja Žuna; Remec-Rekar, Spela; Elersek, Tina; Ferriol, Carmen; Yağcı, Meral Apaydın; Faassen, Elisabeth J.; Delgado-Martín, Jordi; García, David; Cereijo, Jose Luís; Gomà, Joan; Trapote, Mari Carmen; Vegas-Vilarrúbia, Teresa; Obrador, Biel; García-Murcia, Ana; Romo, Susana; Vucelić, Itana BokanUnder ongoing climate change and increasing anthropogenic activity, which continuously challenge ecosystem resilience, an in-depth understanding of ecological processes is urgently needed. Lakes, as providers of numerous ecosystem services, face multiple stressors that threaten their functioning. Harmful cyanobacterial blooms are a persistent problem resulting from nutrient pollution and climate-change induced stressors, like poor transparency, increased water temperature and enhanced stratification. Consistency in data collection and analysis methods is necessary to achieve fully comparable datasets and for statistical validity, avoiding issues linked to disparate data sources. The European Multi Lake Survey (EMLS) in summer 2015 was an initiative among scientists from 27 countries to collect and analyse lake physical, chemical and biological variables in a fully standardized manner. This database includes in-situ lake variables along with nutrient, pigment and cyanotoxin data of 369 lakes in Europe, which were centrally analysed in dedicated laboratories. Publishing the EMLS methods and dataset might inspire similar initiatives to study across large geographic areas that will contribute to better understanding lake responses in a changing environment.
- Global patterns and predictors of microplastic occurrence and abundance in lentic systemsPublication . Nava, Veronica; Frezzotti, Maria Luce; Aherne, Julian; Alfonso, María B.; Geraldes, Ana Maria; Attermeyer, Katrin; Bah, Abdou R.; Bao, Roberto; Bartrons, Mireia; Berger, Stella; Biernaczyk, Marcin; Breider, Florian; Brookes, Justin; Cañedo-Argüelles, Miguel; Canle, Moisés; Capelli, Camilla; Carballeira, Rafael; Cereijo, Jose Luís; Christensen, Søren T.; Christoffersen, Kirsten Seestern; Clayer, Francois; Eyto, Elvira de; Domis, Lisette N. de Senerpont; Delgado, Martín Jordi; Doubek, Jonathan; Eaton, Ashley; Seyda, Erdogan; Erina, Oxana; Ersoy, Zeynep; Feuchtmayr, Heidrun; Fugère, Vincent F.; Galafassi, Silvia; Gonçalves, Vítor Manuel da Costa; Grossart, Hans-Peter; Hamilton, David; Hanson, Paul C.; Harris, Ted; Kankılıç, Gökben Başaran; Kessler, Rebecca; Jacquet, Stéphan; Kangur, Külli; Kiel, Christine; Knoll, Lesley; Kokorīte, Ilga; Lavoie, Isabelle; Leiva-Presa, Àngels; Lepori, Fabio; Lusher, Amy; Macintyre, Sally; Matias, Miguel; Matsuzaki, Shin-Ichiro; McCarthy, Valerie; McElarney, Yvonne; McNally, David; Belay, Berte Mekonen; Messyasz, Beata; Mlambo, Musa; Nandini, Sarma; Nodine, Emily; Özen, Arda; Ozkundakci, Deniz; Vazquez Perez, Ricardo; Pociecha, Agnieszka; Raposeiro, Pedro M.; Rõõm, Eva-Ingrid; Salmaso, Nico; Singaraju, S.S. Sarma; Saulnier-Talbot, Émilie; Scordo, Facundo; Sibomana, Claver; Stepanowska, Katarzyna; Tavşanoğlu, Ülkü Nihan; Tolotti, Monica; Udoh, Abel; Urrutia-Cordero, Pablo; Valois, Amanda; Vandergoes, Marcus; Verburg, Piet; Volta, Pietro; Wain, Danielle; Wesolek, Brian; Weyhenmeyer, Gesa; Wightman, Ryan; Wood, Susie; Naicheng, Wu; Zawiska, Izabela; Zawisza, Edyta; Zink, Lauren; Leoni, BarbaraThe majority of microplastic research has focused on seawater, with fewer than 4% of microplasticsrelated studies occurring on freshwaters. The limited available information suggests that the abundance of microplastics in freshwaters is often as high or even higher than marine environments. However, comprehensive investigations on occurrence and fate of microplastics in freshwaters are scarce and highly fragmented, partly because detection and identification of microplastic particles is rather complex. In addition, up to now, harmonized and standardized protocols for the sampling and analysis of microplastics in freshwaters do not exist, and studies with different research aims and hypotheses often report unstandardized results, making comparison among studies difficult. In the present study, we performed the first global standardized sampling and analysis effort to investigate the occurrence and distribution of microplastics in surface water of lakes and reservoirs with different anthropogenic impacts. Participants aim to collect water samples of freshwater systems with different features (e.g., area, depth, thermal behavior, watershed), following a common protocol. This 18 establishes the collection of samples by horizontal trawling of a plankton net and, after treatment with hydrogen peroxide, the polymer identification through micro-Raman spectroscopy. This GLEON project will allow obtaining comparable data about microplastic contamination in different freshwater systems around the globe. With this global dataset, our goals are to determine whether a relationship exists between the abundance of microplastics and the waterbody/watershed attributes and understand which factors are likely to influence the occurrence of microplastics in surface water of lentic systems.
- Global-scale compilation of freshwater zooplankton: tiny sentinels of environmental changesPublication . Figary, Stephanie; Meyer, Michael; Pilla, Rachel; Warren Currie; Aborigho, Adebukola Abiodun; Alcocer, Javier; Alfonso, María B.; Anneville, Orlane; Geraldes, Ana Maria; Balkić, Anita Galir; Ban, Syuhei; Banerjee, Arnab; Berger, Stella; Bernát, Gábor; Beyer, Jessica; Bhattacharya, Ruchi; Blank, Kätlin; Bruel, Rosalie; Burnet, Sarah; Butts, Tyler; Carey, Cayelan C.; Caroni, Rossana; Chakrabarty, Moitreyee; Chen, Huihuang; Christoffersen, Kirsten Seestern; Cortés, Alicia; Crispim, Maria Cristina; Eyto, Elvira de; Cardoso, L.; Deemer, Bridget; DeGasperi, Curtis; DeMattei, Braden; Descy, Jean-Pierre; Dimante-Deimantovica, Inta; Diovisalvi, Nadia; Dondajewska-Pielka, Renata; Doubek, Jonathan; Dražina, Tvrtko; Dulic, Zorka; Dur, Gaël; Edwards, Christine; Ejsmont-Karabin, Jolanta; Ersoy, Zeynep; Fernández, Rocío; Feuchtmayr, Heidrun; Fontanarrosa, María Soledad; Tóth, László G; Gaiser, Evelyn; Gideon, Gal; Garcia de Souza, Javier R.; Ger, Kemal Ali; Scott, Girdner; Gołdyn, Ryszard; Grossart, Hans-Peter; Hambright, K. David; Hansson, Lars-Anders; Hendricks, Susan; Jacquet, Stéphan; Kainz, Martin; Karpowicz, Maciej; Khan, Sami; Kowalczewska-Madura, Katarzyna; Kuczyńska-Kippen, Natalia; Lepori, Fabio; Lin, Shuqi; Manca, Marina; Matsuzaki, Shin-Ichiro; McElarney, Yvonne; Menezes, Rosemberg; Michaloudi, Evangelia; Moe, Jannicke; Molina, Florencia Rojas; Mueller-Navarra, Doerthe; Muñoz-Colmenares, Manuel; Nejstgaard, Jens; Obertegger, Ulrike; Ortiz, David; Oseguera, Luis A.; Paterson, Michael; Piccolo, María Cintia; Pinheiro-Silva, Lorena; Piscia, Roberta; Pomati, Francesco;; Reid, Brian; Rose, Kevin; Rosińska, Joanna; Rudstam, Lars; Rusak, James A.; Rusanovskaya, Olga O.; Salmaso, Nico; Sarvala, Jouko; Schladow, S. Geoffrey; Schmidt, Anna; Scofield, Anne; Scordo, Facundo; Seda, Jaromír; Senft, Katie; Shimaraeva, S.V; Silow, Eugene; Špoljar, Maria; Straile, Dietmar; Stockwel, Jason; Swain, Hilary; Symons, Celia C.; Tanentzap, Andrew; Tartarotti, Barbara; Thackeray, Stephen; Timofeyev, Maxim; Verburg, Piet; Wade, John; Wander , Heather L; Watkins, James; White, David; Wollrab, Sabine; Yang, Jing; Zagarese, Horacio; Zagars, Matiss; Znachor, PetrZooplankton communities are the primary conduit of energy from phytoplankton to planktivorous fish in freshwater ecosystems and play key roles in the functioning of these systems. Therefore, they are often proposed as ecological indicators. However, most zooplankton research focuses on a single waterbody or region, and insights from such studies may not be transferable to other waterbodies. To address this knowledge gap, the Zooplankton as Indicators Group (ZIG) of the Global Lake Ecological Observatory Network (GLEON) assembled a zooplankton dataset that also includes physical and chemical lake characteristics. The dataset has a broad spatial and temporal coverage with data from over 290 waterbodies. Each waterbody includes 1 to 60 years of data, with >70% sampled at least monthly during the growing season (>31,000 sampling events represented). We are exploring the environmental drivers of zooplankton community composition and assessing zooplankton as ecological indicators using this new dataset. Further, we are investigating whether relationships between zooplankton metrics and environmental drivers differ among lake characteristics (e.g., deep vs shallow) or regions, including systems such as the Laurentian Great Lakes, mountain lakes, and tropical lakes. Understanding the linkages between zooplankton communities and environmental drivers is essential to forecasting the future state of freshwaters in a changing world and we expect the dataset to have extensive and versatile applications in examining zooplankton dynamics and ecosystem responses to environmental shifts.
- Impacts of climate-induced drought on lake and reservoir biodiversity and ecosystem services: a reviewPublication . Sun, Xinyu; Armstrong, Margaret; Moradi, Amirmohammad; Bhattacharya, Ruchi; Geraldes, Ana Maria; Munthali, Elias; Grossart, Hans-Peter; Matsuzaki, Shin-Ichiro; Kangur, Külli; Dunalska, Julita; Stockwell, Jason; Borre, LisaIntensifying extreme droughts are altering lentic ecosystems and disrupting services provisioning. Unfortunately, drought research often lacks a holistic and intersectoral consideration of drought impacts, which can limit relevance of the insights for adaptive management. This literature review evaluated the current state of lake and reservoir extreme drought research in relation to biodiversity and three ecosystem services. The study findings demonstrated that few articles linked or discussed drought implications with one or more ecosystem services, instead focusing primarily on biodiversity. Drought effects on biodiversity varied among species and taxonomic groups. In the limited literature that included ecosystem service provisioning, droughts had a general negative effect. Drinking water supply can decrease and become more costly. Decreasing water flow and volume can reduce hydropower generation. Degraded water quality can also impact recreation. Future intersectoral collaborations and research on intensifying droughts should support adaptive management efforts in mitigating drought impacts.
- Plastic debris in freshwater systems worldwidePublication . Nava, Veronica; Aherne, Julian; Alfonso, María B.; Geraldes, Ana Maria; Attermeyer, Katrin; Bao, Roberto; Bartrons, Mireia; Berger, Stella; Biernaczyk, Marcin; Bissen, Raphael; Brookes, Justin; Brown, David; Candian, Giulia; Cañedo-Argüelles, Miguel; Canle, Moisés; Capelli, Camilla; Cereijo, Jose Luís; Carballeira, Rafael; Chawchai, Sakonvan; Chen, Guangjie; Christensen, Søren T.; Christoffersen, Kirsten Seestern; Eyto, Elvira de; Delgado, Jorge; Doubek, Jonathan; Dusaucy, Julia; Erina, Oxana; Ersoy, Zeynep; Feuchtmayr, Heidrun; Lepori, Fabio; Frezzotti, Maria Luce; Galafassi, Silvia; Gateuille, David; Gonçalves, Vítor Manuel da Costa; Grossart, Hans-Peter; Hamilton, David; Kangur, Külli; Kankılıç, Gökben Başaran; Kessler, Rebecca; Kiel, Christine; Krynak, Edward M.; Leiva-Presa, Àngels; Matias, Miguel; Matsuzaki, Shin-Ichiro; McElarney, Yvonne; Mitchell, Mark; Messyasz, Beata; Mlambo, Musa; Motitsoe, Samuel N.; Owens, Caroline; Özkundakci, Deniz; Pinnow, Solvig; Pociecha, Agnieszka; Raposeiro, Pedro M.; Rõõm, Eva-Ingrid; Rotta, Federica; Salmaso, Nico; Scordo, Facundo; Sibomana, Claver; Siewert, Daniel; Stepanowska, Katarzyna; Sudeep, Chandra; Tavşanoğlu, Ülkü Nihan; Tereshina, Maria; Thompson, James; Tolotti, Monica; Valois, Amanda; Verburg, Piet; Wesolek, Brian; Weyhenmeyer, Gesa; Wu, Naicheng; Zawisza, Edyta; Zink, Lauren; Leoni, BarbaraPlastic debris is widespread in freshwater ecosystems, but a rigorous assessment of its global distribution has been hindered by a lack of comprehensive and comparable data. We performed the first standardized global survey of lakes to assess the quantity and type of plastics (>250μm). We included 38 lakes located in 23 different countries distributed across five continents, spanning different environmental gradients and varying levels of anthropogenic stress. All samples were collected by horizontal trawling of a plankton net and subsequently treated with hydrogen peroxide. We identified 9425 plastic particles, which were classified based on shape, color, and size. Polymer identification was carried out using Raman micro-spectroscopy. Our results showed that the concentration of plastics spanned four orders of magnitude (10-3-101 particles/m3). Fibers (49%) and fragments (41%) were the most frequently detected particles, suggesting a secondary origin of plastic contamination. The most commonly identified polymers were polyester (30%), polypropylene (20%), and polyethylene (16%), which are widely used in short life-cycle products and account for the majority of global plastic production. Further, we found that urban-related attributes of lakes/watersheds influenced the occurrence and type of plastics in lentic systems and larger and deeper lakes with higher retention times are accumulating plastic debris at higher concentrations.
- Plastic debris in lakes and reservoirsPublication . Nava, Veronica; Chandra, Sudeep; Aherne, Julian; Alfonso, María B.; Geraldes, Ana Maria; Attermeyer, Katrin; Bao, Roberto; Berger, Stella; Biernaczyk, Marcin; Bissen, Raphael; Brookes, Justin; Brown, David; Cañedo-Argüelles, Miguel; Canle, Moisés; Capelli, Camilla; Carballeira, Rafael; Cereijo, Jose Luís; Chawchai, Sakonvan; Christensen, Søren T.; Christoffersen, Kirsten Seestern; Eyto, Elvira de; Delgado, Jorge; Dornan, Tyler N.; Doubek, Jonathan; Dusaucy, Julia; Erina, Oxana; Ersoy, Zeynep; Feuchtmayr, Heidrun; Frezzotti, Maria Luce; Galafassi, Silvia; Gateuille, David; Gonçalves, Vítor; Grossart, Hans-Peter; Hamilton, David; Harris, Ted; Kangur, Kuelli; Kankılıç, Gökben Başaran; Kessler, Rebecca; Kiel, Christine; Krynak, Edward M.; Leiva-Presa, Àngels; Lepori, Fabio; Matias, Miguel G.; Matsuzaki, Shin-Ichiro; McElarney, Yvonne; Messyasz, Beata; Mitchell, Mark; Mlambo, Musa; Motitsoe, Samuel N.; Nandini, Sarma; Orlandi, Valentina; Owens, Caroline; Ozkundakci, Deniz; Pinnow, Solvig; Pociecha, Agnieszka; Raposeiro, Pedro M.; Room, Eva-Ingrid; Rotta, Federica; Salmaso, Nico; Sarma, Singaraju S.S.; Sartirana, Davide; Scordo, Facundo; Sibomana, Claver; Siewert, Daniel; Stepanowska, Katarzyna; Tavşanoğlu, Ülkü Nihan; Tereshina, Maria; Thompson, James; Tolotti, Monica; Valois, Amanda; Verburg, Piet; Welsh, Brittany; Wesolek, Brian; Weyhenmeyer, Gesa; Wu, Naicheng; Zawisza, Edyta; Zink, Lauren; Leoni, BarbaraPlastic debris is thought to be widespread in freshwater ecosystems globally(1). However, a lack of comprehensive and comparable data makes rigorous assessment of its distribution challenging(2,3). Here we present a standardized cross-national survey that assesses the abundance and type of plastic debris (>250 mu m) in freshwater ecosystems. We sample surface waters of 38 lakes and reservoirs, distributed across gradients of geographical position and limnological attributes, with the aim to identify factors associated with an increased observation of plastics. We find plastic debris in all studied lakes and reservoirs, suggesting that these ecosystems play a key role in the plastic-pollution cycle. Our results indicate that two types of lakes are particularly vulnerable to plastic contamination: lakes and reservoirs in densely populated and urbanized areas and large lakes and reservoirs with elevated deposition areas, long water-retention times and high levels of anthropogenic influence. Plastic concentrations vary widely among lakes; in the most polluted, concentrations reach or even exceed those reported in the subtropical oceanic gyres, marine areas collecting large amounts of debris(4). Our findings highlight the importance of including lakes and reservoirs when addressing plastic pollution, in the context of pollution management and for the continued provision of lake ecosystem services.
- Stratification strength and light climate explain variation in chlorophyll a at the continental scale in a European multilake survey in a heatwave summerPublication . Donis, Daphne; Mantzouki, Evanthia; McGinnis, Daniel F.; Vachon, Dominic; Gallego, Irene; Grossart, Hans-Peter; Senerpont Domis, Lisette N.; Teurlincx, Sven; Seelen, Laura; Lürling, Miquel; Verstijnen, Yvon; Fernández-Morán, Elísabeth; Camacho, Antonio; Úbeda, Bárbara; Çapkın, Kadir; Tuvikene, Lea; Salmi, Pauliina; Önem, Burçin; Paerl, Hans W.; Carey, Cayelan C.; Plenković-Moraj, Anđelka; Obertegger, Ulrike; Domek, Piotr; Jakubowska-Krepska, Natalia; Ibelings, Bastiaan W.; Laas, Alo; Pełechaty, Mariusz; Machado-Vieira, Danielle; Kangro, Kersti; Panksep, Kristel; Koreivienė, Judita; Wilk‐Woźniak, Elżbieta; Walusiak, Edward; Vasconcelos, Vítor; Morais, João; Bláha, Luděk; Rothhaupt, Karl-Otto; Krstić, Svetislav; Geriš, Rodan; Gkelis, Spyros; Avagianos, Christos; Panou, Manthos; Goldyn, Ryszard; Boscaini, Adriano; Rosińska, Joanna; Niedźwiecki, Michał; Szeląg-Wasielewska, Elżbieta; Karosienė, Jūratė; Haande, Sigrid; Colom‐Montero, William; Kasperovičienė, Jūratė; Karpowicz, Maciej; Skjelbred, Birger; Chmura, Damian; Ochocka, Agnieszka; Pasztaleniec, Agnieszka; Krztoń, Wojciech; Geraldes, Ana Maria; Pełechata, Aleksandra; Leira, Manel; Triantis, Theodoros; Toporowska, Magdalena; Trapote, Mari Carmen; Zervou, Sevasti‐Kiriaki; Napiórkowska-Krzebietke, Agnieszka; García‐Murcia, Ana; Pawlik-Skowronska, Barbara; Dunalska, Julita; Oliveira, Alinne Gurjão; Christoffersen, Kirsten Seestern; Kozak, Anna; Hiskia, Anastasia; Aleksovski, Boris; Nawrocka, Lidia; Kobos, Justyna; Kwasizur, Kinga; Catalán, Núria; Pérez‐Martínez, Carmen; Mazur-Marzec, Hanna; Kokocinski, Mikolaj; Moreno-Ostos, Enrique; Messyasz, Beata; Madrecka‐Witkowska, Beata; Fránková, Markéta; Häggqvist, Kerstin; Jasser, Iwona; Alcaraz-Párraga, Pablo; Chomova, Lucia; Buck, Moritz; Sieńska, Justyna; Szymański, Daniel; Vale, Micaela; Picazo, Antonio; Rochera, Carlos; Kruk, Marek; Nemova, Hana; Romo, Susana; Raposeiro, Pedro M.; Remec-Rekar, Spela; Drastichova, Iveta; Savadova‐Ratkus, Ksenija; Flaim, Giovanna; Vitonytė, Irma; Budzyńska, Agnieszka; Yang, Yang; Gomà, Joan; Kostrzewska-Szlakowska, Iwona; Frąk, Magdalena; Bańkowska-Sobczak, Agnieszka; Elersek, Tina; Tavşanoğlu, Ülkü Nihan; Çelik, Kemal; Wasilewicz, Michał; Mustonen, Kristiina; Yilmaz, Mete; Gonçalves, Vítor Manuel da Costa; Richardson, Jessica; Pierson, Don; Edwards, Christine; Hernández, Armand; Uysal, Rahmi; Latife, Köker; Hansson, Lars-Anders; Vegas‐Vilarrúbia, Teresa; Özkan, Korhan; Urrutia-Cordero, Pablo; Real, Monserrat; Obrador, Biel; Romans, Elvira; Levi, Eti E.; Bezirci, Gizem; Antoniou, Maria G.; Tsiarta, Nikoletta; Cromie, Hannah; Ramos‐Rodríguez, Eloísa; Stević, Filip; Delgado-Martín, Jordi; Blanco, José María; Cillero-Castro, Carmen; Rodríguez, Valeriano; Yağcı, Abdulkadir; Carballeira, Rafael; Bilgin, Fuat; Koçer, Mehmet Ali Turan; Bulut, Cafer; Noguero-Ribes, Jordi; Santamans, Anna C.; Feldmann, Tõnu; Duque, David Parreño; Soria, Juan Miguel; Ferriol, Carmen; Özen, Arda; Maliaka, Valentini; Fonvielle, Jeremy; Iskin, Uğur; Verspagen, Jolanda; Alp, Mehmet Tahir; Herk, Maria; Montes-Pérez, Jorge Juan; Ozhan, Koray; Arvola, Lauri; Palomino, Roberto L.; Maraşlıoğlu, Faruk; Kaloudis, Triantafyllos; Karakaya, Nusret; Fakioglu, Özden; Bravo, Andrea G.; Cereijo, Jose Luís; Cesur, Mehmet; Rodríguez‐Pérez, Estela; Maronić, Dubravka Špoljarić; Karan, Tünay; Demir, Nilsun; Akçaalan, Reyhan; Salmaso, Nico; Cerasino, Leonardo; Beklioğlu, Meryem; Sevindik, Tuğba Ongun; Grabowska, Magdalena; Albay, Meriç; Tunca, Hatice; García, David; Gálvez, José Ángel; Visser, Petra M.; Filiz, Nur; Žutinić, Petar; Warming, Trine Perlt; Soylu, Elif Neyran; Yağcı, Meral Apaydın; McCarthy, Valerie; Gagala‐Borowska, Ilona; Mankiewicz-Boczek, Joana; Çınar, Şakir; Pfeiffer, Tanja Žuna; Pęczuła, Wojciech; Perello, Victor C.; Udovič, Marija Gligora; Vucelić, Itana BokanTo determine the drivers of phytoplankton biomass, we collected standardized morphometric, physical, and biological data in 230 lakes across the Mediterranean, Continental, and Boreal climatic zones of the European continent. Multilinear regression models tested on this snapshot of mostly eutrophic lakes (median total phosphorus [TP] = 0.06 and total nitrogen [TN] = 0.7 mg L-1), and its subsets (2 depth types and 3 climatic zones), show that light climate and stratification strength were the most significant explanatory variables for chlorophyll a (Chl a) variance. TN was a significant predictor for phytoplankton biomass for shallow and continental lakes, while TP never appeared as an explanatory variable, suggesting that under high TP, light, which partially controls stratification strength, becomes limiting for phytoplankton development. Mediterranean lakes were the warmest yet most weakly stratified and had significantly less Chl a than Boreal lakes, where the temperature anomaly from the long-term average, during a summer heatwave was the highest (+4 C) and showed a significant, exponential relationship with stratification strength. This European survey represents a summer snapshot of phytoplankton biomass and its drivers, and lends support that light and stratification metrics, which are both affected by climate change, are better predictors for phytoplankton biomass in nutrient-rich lakes than nutrient concentrations and surface temperature.
- Temperature effects explain continental scale distribution of cyanobacterial toxinsPublication . Mantzouki, Evanthia; Lürling, Miquel; Fastner, Jutta; Domis, Lisette N. de Senerpont; Wilk-Woźniak, Elżbieta; Koreivienė, Judita; Seelen, Laura; Teurlincx, Sven; Verstijnen, Yvon; Krztoń, Wojciech; Walusiak, Edward; Szeląg-Wasielewska, Elżbieta; Beklioğlu, Meryem; Rothhaupt, Karl-Otto; Panou, Manthos; Straile, Dietmar; Domek, Piotr; Jakubowska-Krepska, Natalia; Kwasizur, Kinga; Messyasz, Beata; Noguero-Ribes, Jordi; Triantis, Theodoros; Stević, Filip; Pełechata, Aleksandra; Pełechaty, Mariusz; Filiz, Nur; Soylu, Elif Neyran; Levi, Eti E.; Drastichova, Iveta; Duque, David Parreño; Fernández-Morán, Elísabeth; Karakaya, Nusret; Salmi, Pauliina; Avagianos, Christos; Pfeiffer, Tanja Žuna; Kaloudis, Triantafyllos; Vucelić, Itana Bokan; Iskin, Uğur; Bezirci, Gizem; Tavşanoğlu, Ülkü Nihan; Obrador, Biel; Pierson, Don; Özhan, Koray; Budzyńska, Agnieszka; Yang, Yang; Trapote, Mari Carmen; Çelik, Kemal; Yilmaz, Mete; Marcé, Rafael; Mazur-Marzec, Hanna; Tuvikene, Lea; Catalán, Núria; Rochera, Carlos; Gagala‐Borowska, Ilona; Vegas-Vilarrúbia, Teresa; Christoffersen, Kirsten Seestern; Raposeiro, Pedro M.; Gonçalves, Vítor Manuel da Costa; Antoniou, Maria G.; Moreno-Ostos, Enrique; Boscaini, Adriano; Tsiarta, Nikoletta; Plenković-Moraj, Anđelka; Flaim, Giovanna; Kobos, Justyna; Cillero-Castro, Carmen; Niedźwiecki, Michał; Mankiewicz-Boczek, Joana; Yağcı, Meral Apaydın; Çınar, Şakir; Romo, Susana; Geraldes, Ana Maria; Çapkın, Kadir; Vitonytė, Irma; Vasconcelos, Vítor; Hernández, Armand; Zervou, Sevasti-Kiriaki; Leira, Manel; Camacho, Antonio; Salmaso, Nico; Cerasino, Leonardo; Richardson, Jessica; Wasilewicz, Michał; Urrutia-Cordero, Pablo; Visser, Petra M.; Warming, Trine Perlt; Bláha, Luděk; Hiskia, Anastasia; Ferriol, Carmen; Chomova, Lucia; Santamans, Anna C.; Jasser, Iwona; Morais, João; Vale, Micaela; Köker, Latife; Goldyn, Ryszard; Akçaalan, Reyhan; Albay, Meriç; Haande, Sigrid; Pęczuła, Wojciech; Geriš, Rodan; Edwards, Christine; Bańkowska-Sobczak, Agnieszka; Nawrocka, Lidia; Frąk, Magdalena; Karosienė, Jūratė; Fránková, Markéta; Koçer, Mehmet Ali Turan; Alp, Mehmet Tahir; Skjelbred, Birger; Žutinić, Petar; Remec-Rekar, Spela; Elersek, Tina; Sevindik, Tuğba Ongun; Picazo, Antonio; Tunca, Hatice; Kokocinski, Mikolaj; Kasperovičienė, Jūratė; Madrecka‐Witkowska, Beata; Nemova, Hana; Machado-Vieira, Danielle; Udovič, Marija Gligora; Oliveira, Alinne Gurjão; Häggqvist, Kerstin; Önem, Burçin; Aleksovski, Boris; Krstić, Svetislav; Fakioglu, Özden; Grabowska, Magdalena; Savadova‐Ratkus, Ksenija; Karpowicz, Maciej; Gkelis, Spyros; Delgado-Martín, Jordi; García, David; Cereijo, Jose Luís; Mustonen, Kristiina; Pérez-Martínez, Carmen; Gomà, Joan; Bilgin, Fuat; Ramos‐Rodríguez, Eloísa; Bravo, Andrea G.; Chmura, Damian; Úbeda, Bárbara; Gálvez, José Ángel; Panksep, Kristel; Blanco, José María; Özen, Arda; Maraşlıoğlu, Faruk; Rodríguez, Valeriano; Colom-Montero, William; McCarthy, Valerie; Arvola, Lauri; Alcaraz-Párraga, Pablo; Toporowska, Magdalena; Obertegger, Ulrike; Soria, Juan Miguel; Pawlik-Skowronska, Barbara; Fonvielle, Jeremy; Dunalska, Julita; Laas, Alo; Feldmann, Tõnu; Yağcı, Abdulkadir; Montes-Pérez, Jorge Juan; Palomino, Roberto L.; Rodríguez-Pérez, Estela; Pasztaleniec, Agnieszka; Özkan, Korhan; Carballeira, Rafael; Buck, Moritz; Maliaka, Valentini; Uysal, Rahmi; García-Murcia, Ana; Bulut, Cafer; Verspagen, Jolanda M.H.; Sieńska, Justyna; Szymański, Daniel; Kruk, Marek; Hansson, Lars-Anders; Kozak, Anna; Kostrzewska-Szlakowska, Iwona; Perello, Victor C.; Rosińska, Joanna; Real, Monserrat; Ochocka, Agnieszka; Demir, Nilsun; Napiórkowska-Krzebietke, Agnieszka; Maronić, Dubravka Špoljarić; Kangro, Kersti; Grossart, Hans-Peter; Paerl, Hans W.; Karan, Tünay; Carey, Cayelan C.; Ibelings, Bastiaan W.; Romans, Elvira; Cesur, MehmetInsight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g., anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to their potency. Most studies examine the relationship between individual toxin variants and environmental factors, such as nutrients, temperature and light. In summer 2015, we collected samples across Europe to investigate the effect of nutrient and temperature gradients on the variability of toxin production at a continental scale. Direct and indirect effects of temperature were the main drivers of the spatial distribution in the toxins produced by the cyanobacterial community, the toxin concentrations and toxin quota. Generalized linear models showed that a Toxin Diversity Index (TDI) increased with latitude, while it decreased with water stability. Increases in TDI were explained through a significant increase in toxin variants such as MC-YR, anatoxin and cylindrospermopsin, accompanied by a decreasing presence of MC-LR. While global warming continues, the direct and indirect effects of increased lake temperatures will drive changes in the distribution of cyanobacterial toxins in Europe, potentially promoting selection of a few highly toxic species or strains.
- The effects of hypoxia on zooplankton population estimates and migration in lakesPublication . Goldfarb, Sadye K.; Doubek, Jonathan; Geraldes, Ana Maria; Bartrons, Mireia; Berger, Stella; Brentrup, Jannifer; Brucet, Sandra; Burnet, Sarah; Caputo Galarce, Luciano; Carey, Cayelan C.; Christoffersen, Kirsten Seestern; Eyto, Elvira de; Dur, Gaël; Erdoğan, Şeyda; Erina, Oxana; Grossart, Hans-Peter; Kainz, Martin; Kankılıç, Gökben Başaran; Khan, Sami; Leoni, Barbara; Lepori, Fabio; McCarthy, Valerie; Nava, Veronica; Nejstgaard, Jens; Obertegger, Ulrike; Ogorelec, Ziga; Ozen, Arda; Pascual, Maria; Paterson, Michael; Patelli, Martina; Qiu, Qianlinglin; Richardson, David; Sepulveda-Jauregui, Armando; Silva, Lorena; Straile, Dietmar; Tartarotti, Barbara; Tavşanoğlu, Ülkü Nihan; Tereshina, Maria; Umaña-Villalobos, Gerardo; Walles, Tim; Wander, Heather; Wurtsbaugh, Wayne; Stockwell, JasonMany zooplankton species typically exhibit diel vertical migration (DVM), where zooplankton migrate from the hypolimnion to the epilimnion of lakes at night. Zooplankton exhibit this behavior to avoid visual predators and UV radiation by remaining in the bottom waters during the day and ascending to the surface waters to feed on phytoplankton at night. However, hypoxic conditions in the hypolimnion of lakes mayinterfere with DVM and force zooplankton to increase diel horizontal migration (DHM) to find predation refuge in littoral zones. Climate change and eutrophication are expected to increase the prevalence and severity of hypoxic conditions worldwide and thereby possibly alter zooplankton migration patterns. We hypothesize that hypoxia will force zooplankton to shift their migration patterns from predominantly DVM to DHM to avoid oxygen-depleted bottom waters. To test our hypothesis, we are conducting a standardized global sampling program to test whether pelagic, full water column estimates of zooplankton are greater at night versus the day under hypolimnetic hypoxic versus oxic conditions. Participants are aiming to sample at least one lake with an oxic hypolimnion and one lake with a hypoxic hypolimnion during the thermally-stratified period at midday and midnight. With our global dataset (currently expecting about 60 lakes in 22 countries), our goal is to improve our understanding of how global change may alter zooplankton migration behavior and patterns in lakes.