Now showing items 1-20 of 385

  • Parameterization of surface water temperature and long-term trends in Europe’s fourth largest lake shows recent and rapid warming in winter 

    Öglü, Burak; Möls, Tõnu; Kaart, Tanel; Cremona, Fabien; Kangur, Külli (Elsevier, 2020)
    Changes in the ice phenology, seasonal temperature and extreme events are consistent evidence of climate change effect on lakes. In this study, we analyzed multiannual variability, determined long-term trends and detected ...
  • Is fish biomass controlled by abiotic or biotic factors? Results of long- term monitoring in a large eutrophic lake 

    Öglü, Burak; Bhele, Upendra; Järvalt, Ain; Tuvikene, Lea; Timm, Henn; Seller, Siim; Haberman, Juta; Agasild, Helen; Nõges, Peeter; Silm, Maidu; Bernotas, Priit; Nõges, Tiina; Cremona, Fabien (Elsevier, 2020)
    Relationships between biomass and ecological factors including trophic interactions were examined to understand the dynamics of six fish species in Lake Võrtsjärv, a large shallow eutrophic lake located in Estonia (north-eastern ...
  • How warming and other stressors affect zooplankton abundance, biomass and community composition in shallow eutrophic lakes 

    Cremona, Fabien; Agasild, Helen; Haberman, Juta; Zingel, Priit; Nõges, Peeter; Nõges, Tiina; Laas, Alo (Springer Nature, 2020)
    We aimed to investigate the influence of environmental factors and predict zooplankton biomass and abundance in shallow eutrophic lakes. We employed time series of zoo- plankton and environmental parameters that were ...
  • Mullavesi 

    Reintam, Endla (koostaja); Astover, Alar (koostaja) (Eesti Maaülikool, 2022)
    Mullavesi on mullas erinevates vormides esinev vesi. Maailma kogu mageveevarust moodustab see vaid 0,05%, ent on asendamatu tähtsusega maismaal elu toimimiseks.
  • How long-term water level changes influence the spatial distribution of fish and other functional groups in a large shallow lake 

    Bhele, Upendra; Öğlü, Burak; Tuvikene, Arvo; Bernotas, Priit; Silm, Maidu; Järvalt, Ain; Agasild, Helen; Zingel, Priit; Seller, Siim; Timm, Henn; Nõges, Peeter; Nõges, Tiina; Cremona, Fabien (Elsevier, 2020)
    We numerically explored the effects of long-term water level changes on biotic biomass and spatial distribution of fish in a large shallow lake. We calibrated Ecospace model (Ecopath with Ecosim modelling suite) with data ...
  • Large-scale geographical and environmental drivers of shallow lake diatom metacommunities across Europe 

    Rodríguez-Alcalá, Omar; Blanco, Saúl; García-Girón, Jorge; Jeppesen, Erik; Irvine, Ken; Nõges, Peeter; Nõges, Tiina; Gross, Elisabeth M.; Bécares, Eloy (Elsevier, 2020)
    Disentangling the relative role of species sorting and dispersal limitation in biological communities has become one of the main issues for community ecologists and biogeographers. In this study, we analysed a data set ...
  • Major effects of alkalinity on the relationship between metabolism and dissolved inorganic carbon dynamics in lakes 

    Khan, Hares; Laas, Alo; Marcé, Rafael; Obrador, Biel (Springer, 2020)
    Several findings suggest that CO 2 emissions in lakes are not always directly linked to changes in metabolism but can be associated with interactions with the dissolved inorganic carbon equilibrium. Alkalinity has been ...
  • Hidden treasures: Human-made aquatic ecosystems harbour unexplored opportunities 

    Koschorreck, Matthias; Downing, Andrea S.; Hejzlar, Josef; Marcé, Rafael; Laas, Alo; Arndt, Witold G.; Keller, Philipp S.; Smolders, Alfons J. P.; van Dijk, Gijs; Kosten, Sarian (Springer, 2020)
    Artificial water bodies like ditches, fish ponds, weirs, reservoirs, fish ladders, and irrigation channels are usually constructed and managed to optimize their intended purposes. However, human-made aquatic systems also ...
  • Paired O₂–CO₂ measurements provide emergent insights into aquatic ecosystem function 

    Vachon, Dominic; Sadro, Steven; Bogard, Matthew J.; Lapierre, Jean-Francois; Baulch, Helen M.; Rusak, James A.; Denfeld, Blaize A.; Laas, Alo; Klaus, Marcus; Karlsson, Jan; Weyhenmeyer, Gesa A.; del Giorgio, Paul A. (Wiley, 2020)
    Metabolic stoichiometry predicts that dissolved oxygen (O2 ) and carbon dioxide (CO2 ) in aquatic ecosystems should covary inversely; however, field observations often diverge from theoretical expectations. Here, we propose ...
  • ‘‘Large lakes – Small world”: Common issues and challenges presented during the joint ELLS-IAGLR 2018 Conference 

    Anneville, Orlane; Höök, Tomas O.; Nõges, Peeter; Prats, Jordi; Salmaso, Nico; Vinçon-Leite, Brigitte; Rao, Yerubandi R. (Elsevier, 2020)
    As freshwater ecosystems, lakes are essential resources on Earth and offer a wide variety of services to nature and society. Large lakes are iconic waterbodies due to their size and the wealth of ecosystem services they ...
  • Projekt „Bioressursside kõrgema väärindamise huvi tõstmine ja ressursside uuring“ : Kagu-Eesti bioressursside uuringu aruanne 

    Värnik, Rando (koostaja); Kriipsalu, Mait (koostaja); Kaasik, Allan (koostaja); Orupõld, Kaja (koostaja); Lillemets, Jüri (koostaja); Aro, Kersti (koostaja) (Eesti Maaülikool, 2022)
    Taastuvatest energiaallikatest toodetud energia kasutamise edendamise direktiivi ((EL) 2018/2001, 11. detsember 2018) kohaselt on biomass põllumajandusest (nii taimsed kui ka loomsed materjalid), metsamajandusest ja sellega ...
  • Global patterns and drivers of ecosystem functioning in rivers and riparian zones 

    Tiegs, Scott D.; Costello, David M.; Isken, Mark W.; Woodward, Guy; McIntyre, Peter B.; Gessner, Mark O.; Chauvet, Eric; Griffiths, Natalie A.; Flecker, Alex S.; Acuña, Vicenç; Albariño, Ricardo; Allen, Daniel C.; Alonso, Cecilia; Andino, Patricio; Arango, Clay; Aroviita, Jukka; Barbosa, Marcus V. M.; Barmuta, Leon A.; Baxter, Colden V.; Bell, Thomas D. C.; Bellinger, Brent; Boyero, Luz; Brown, Lee E.; Bruder, Andreas; Bruesewitz, Denise A.; Burdon, Francis J.; Callisto, Marcos; Canhoto, Cristina; Capps, Krista A.; Castillo, María M.; Clapcott, Joanne; Colas, Fanny; Colón-Gaud, Checo; Cornut, Julien; Crespo-Pérez, Verónica; Cross, Wyatt F.; Culp, Joseph M.; Danger, Michael; Dangles, Olivier; de Eyto, Elvira; Derry, Alison M.; Villanueva, Veronica Díaz; Douglas, Michael M.; Elosegi, Arturo; Encalada, Andrea C.; Entrekin, Sally; Espinosa, Rodrigo; Ethaiya, Diana; Ferreira, Verónica; Ferriol, Carmen; Flanagan, Kyla M.; Fleituch, Tadeusz; Follstad Shah, Jennifer J.; Frainer Barbosa, André; Friberg, Nikolai; Frost, Paul C.; Garcia, Erica A.; García Lago, Liliana; García Soto, Pavel Ernesto; Ghate, Sudeep; Giling, Darren P.; Gilmer, Alan; Gonçalves, José Francisco; Gonzales, Rosario Karina; Graça, Manuel A. S.; Grace, Mike; Grossart, Hans-Peter; Guérold, François; Gulis, Vlad; Hepp, Luiz U.; Higgins, Scott; Hishi, Takuo; Huddart, Joseph; Hudson, John; Imberger, Samantha; Iñiguez-Armijos, Carlos; Iwata, Tomoya; Janetski, David J.; Jennings, Eleanor; Kirkwood, Andrea E.; Koning, Aaron A.; Kosten, Sarian; Kuehn, Kevin A.; Laudon, Hjalmar; Leavitt, Peter R.; Lemes da Silva, Aurea L.; Leroux, Shawn J.; LeRoy, Carri J.; Lisi, Peter J.; MacKenzie, Richard; Marcarelli, Amy M.; Masese, Frank O.; McKie, Brendan G.; Oliveira Medeiros, Adriana; Meissner, Kristian; Miliša, Marko; Mishra, Shailendra; Miyake, Yo; Moerke, Ashley; Mombrikotb, Shorok; Mooney, Rob; Moulton, Tim; Muotka, Timo; Negishi, Junjiro N.; Neres-Lima, Vinicius; Nieminen, Mika L.; Nimptsch, Jorge; Ondruch, Jakub; Paavola, Riku; Pardo, Isabel; Patrick, Christopher J.; Peeters, Edwin T. H. M.; Pozo, Jesus; Pringle, Catherine; Prussian, Aaron; Quenta, Estefania; Quesada, Antonio; Reid, Brian; Richardson, John S.; Rigosi, Anna; Rincón, José; Rîşnoveanu, Geta; Robinson, Christopher T.; Rodríguez-Gallego, Lorena; Royer, Todd V.; Rusak, James A.; Santamans, Anna C.; Selmeczy, Géza B.; Simiyu, Gelas; Skuja, Agnija; Smykla, Jerzy; Sridhar, Kandikere R.; Sponseller, Ryan; Stoler, Aaron; Swan, Christopher M.; Szlag, David; Teixeira-de Mello, Franco; Tonkin, Jonathan D.; Uusheimo, Sari; Veach, Allison M.; Vilbaste, Sirje; Vought, Lena B. M.; Wang, Chiao-Ping; Webster, Jackson R.; Wilson, Paul B.; Woelfl, Stefan; Xenopoulos, Marguerite A.; Yates, Adam G.; Yoshimura, Chihiro; Yule, Catherine M.; Zhang, Yixin X.; Zwart, Jacob A. (American Association for the Advancement of Science, 2019)
    River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized ...
  • Climate-induced changes in carbon flows across the plant-consumer interface in a small subarctic lake 

    Belle, Simon; Nilsson, Jenny L.; Tõnno, Ilmar; Freiberg, Rene; Vrede, Tobias; Goedkoop, Willem (Nature, 2019)
    Reconstructions of past food web dynamics are necessary for better understanding long-term impacts of climate change on subarctic lakes. We studied elemental and stable isotopic composition of sedimentary organic matter, ...
  • Northern Hemisphere Atmospheric Stilling Accelerates Lake Thermal Responses to a Warming World 

    Woolway, R. Iestyn; Merchant, Christopher J.; Van Den Hoek, Jamon; Azorin‐Molina, Cesar; Nõges, Peeter; Laas, Alo; Mackay, Eleanor B.; Jones, Ian D. (American Geophysical Union, 2019)
    Climate change, in particular the increase in air temperature, has been shown to influence lake thermal dynamics, with climatic warming resulting in higher surface temperatures, stronger stratification, and altered mixing ...
  • Widespread diminishing anthropogenic effects on calcium in freshwaters 

    Weyhenmeyer, Gesa A.; Hartmann, Jens; Hessen, Dag O.; Kopáček, Jiří; Hejzlar, Josef; Jacquet, Stéphan; Hamilton, Stephen K.; Verburg, Piet; Leach, Taylor H.; Schmid, Martin; Flaim, Giovanna; Nõges, Tiina; Nõges, Peeter; Wentzky, Valerie C.; Rogora, Michela; Rusak, James A.; Kosten, Sarian; Paterson, Andrew M.; Teubner, Katrin; Higgins, Scott N. H; Lawrence, Gregory; Kangur, Külli; Kokorite, Ilga; Cerasino, Leonardo; Funk, Clara; Harvey, Rebecca; Moatar, Florentina; Wit, Heleen A.; Zechmeister, Thomas (Nature, 2019)
    Calcium (Ca) is an essential element for almost all living organisms. Here, we examined global variation and controls of freshwater Ca concentrations, using 440 599 water samples from 43 184 inland water sites in 57 ...
  • Holocene shifts in the primary producer community of large, shallow European Lake Peipsi, inferred from sediment pigment analysis 

    Tõnno, Ilmar; Nauts, Kristiina; Belle, Simon; Nõmm, Monika; Freiberg, Rene; Kõiv, Toomas; Alliksaar, Tiiu (Springer, 2019)
    We used HPLC to identify and quantify pigments in a Holocene sediment record from large, shallow Lake Peipsi, Estonia. The aim of our study was to track the influence of long-term climate change (i.e. temperature ...
  • Do abundance and percentage of dipteran larvae and Oligochaeta indicate low water quality in streams and lake littoral? 

    Timm, Henn; Haldna, Marina (Sciendo, 2019)
    The presence of chironomids and/or oligochaetes is generally considered to be an indication of poor status of freshwater. Non-chironomid dipterans show unclear trends. The abundance and percentage of these groups are ...
  • Boosting the monitoring of phytoplankton in optically complex coastal waters by combining pigment-based chemotaxonomy and in situ radiometry 

    Tamm, Marju; Ligi, Martin; Panksep, Kristel; Teeveer, Karolin; Freiberg, Rene; Laas, Peeter; Paavel, Birgot; Kutser, Tiit; Reinart, Anu; Tõnno, Ilmar; Nõges, Tiina (Elsevier, 2019)
    Research about the occurrence and extent of the cyanobacterial blooms in the Baltic Sea is critical due to their increased magnitude and frequency. Monitoring of the blooms is complicated due to their spatially and ...
  • The influence of macrophytes on the feeding of fish larvae in a shallow brackish sea 

    Zingel, Priit; Karus, Katrit; Agasild, Helen; Nõges, Tiina (Elsevier, 2019)
    We studied the impact of the macrophyte stands on the feeding of fish larvae, paying special attention to feeding on ciliates. Generally, the importance of ciliates as larval food has been overlooked or underestimated. ...
  • Importance of ciliates as food for fish larvae in a shallow sea bay and a large shallow lake 

    Zingel, Priit; Agasild, Helen; Karus, Katrit; Buholce, Linda; Nõges, Tiina (Elsevier, 2019)
    We estimated the consumption of planktonic ciliates by fish larvae in the Väinameri Sea (a shallow semi-enclosed bay of the Baltic Sea) and Lake Võrtsjärv (a shallow and eutrophic lake). Our primary hypothesis was that ...