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1. Plastic debris in lakes and reservoirs

Author

Nava, Veronica, Chandra, Sudeep, Aherne, Julian, Alfonso, María B., Antão-Geraldes, Ana M., Attermeyer, Katrin, Bao, Roberto, Bartrons, Mireia, Berger, Stella A., Biernaczyk, Marcin, Bissen, Raphael, Brookes, Justin D., Brown, David, Cañedo-Argüelles, Miguel, Canle, Moisés, Capelli, Camilla, Carballeira, Rafael, Cereijo, José Luis, Chawchai, Sakonvan, Christensen, Søren T., Christoffersen, Kirsten S., de Eyto, Elvira, Delgado, Jorge, Dornan, Tyler N., Doubek, Jonathan P., Dusaucy, Julia, Erina, Oxana, Ersoy, Zeynep, Feuchtmayr, Heidrun, Frezzotti, Maria Luce, Galafassi, Silvia, Gateuille, David, Gonçalves, Vitor, Grossart, Hans-Peter, Hamilton, David P., Harris, Ted D., Kangur, Külli, Kankılıç, Gökben Başaran, Kessler, Rebecca, Kiel, Christine, Krynak, Edward M., Leiva-Presa, Àngels, Lepori, Fabio, Matias, Miguel G., Matsuzaki, Shin-ichiro S., McElarney, Yvonne, Messyasz, Beata, Mitchell, Mark, Mlambo, Musa C., Motitsoe, Samuel N., Nandini, Sarma, Orlandi, Valentina, Owens, Caroline, Özkundakci, Deniz, Pinnow, Solvig, Pociecha, Agnieszka, Raposeiro, Pedro Miguel, Rõõm, Eva-Ingrid, Rotta, Federica, Salmaso, Nico, Sarma, S. 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 A., Wu, Naicheng, Zawisza, Edyta, Zink, Lauren, and Leoni, Barbara

Published
2023
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2. Plastic debris in freshwater systems worldwide

Author

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, 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, and Leoni, Barbara

Subjects
Research Subject Categories::TECHNOLOGY, Plastic debris
Abstract

Plastic 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. info:eu-repo/semantics/publishedVersion

Published
2022

4. Global patterns and predictors of microplastic occurrence and abundance in lentic systems

Author

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, 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, Barbara, Nava, V, Frezzotti, M, Aherne, J, Alfonso, M, Antão-Geraldes, A, Attermeyer, K, Bah, A, Bao, R, Bartrons, M, Berger, S, Biernaczyk, M, Breider, F, Brookes, J, Cañedo-Argüelles, M, Canle, M, Capelli, C, Carballeira, R, Cereijo, J, Christensen, S, Christoffersen, K, Clayer, F, De Eyto, E, De Senerpont Domis, L, Delgado, M, Doubek, J, Eaton, A, Erdogan, S, Erina, O, Ersoy, Z, Feuchtmayr, H, Fugère, V, Galafassi, S, Gonçalves, V, Grossart, H, Hamilton, D, Hanson, P, Harris, T, Kankılıç, G, Kessler, R, Jacquet, S, Kangur, K, Kiel, C, Knoll, L, Kokorīte, I, Lavoie, I, Leiva-Presa, A, Lepori, F, Lusher, A, Macintyre, S, Matias, M, Matsuzaki, S, Mccarthy, V, Mcelarney, Y, Mcnally, D, Belay, B, Messyasz, B, Mlambo, M, Nandini, S, Nodine, E, Özen, A, Ozkundakci, D, Perez, R, Pociecha, A, Raposeiro, P, Rõõm, E, Salmaso, N, Sarma, S, Saulnier-Talbot, E, Scordo, F, Sibomana, C, Stepanowska, K, Tavşanoğlu, U, Tolotti, M, Udoh, A, Urrutia Cordera, P, Valois, A, Vandergoes, M, Verburg, P, Volta, P, Wain, D, Wesolek, B, Weyhenmeyer, G, Wightman, R, Wood, S, Wu, N, Zawiska, I, Zawisza, E, Zink, L, and Leoni, B

Subjects
reservoir, watershed feature, lake, micro-Raman spectroscopy, Plastics, microplastic
Abstract

The 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. info:eu-repo/semantics/publishedVersion

Published
2020

11. REPRODUCTION OF COD, GADUS MORHUA (ACTINOPTERYGII: GADIFORMES: GADIDAE), FROM THE GDAŃSK DEEP (BALTIC SEA) UNDER CONTROLLED CONDITIONS.

Author

BIERNACZYK, Marcin, NEJA, Zbigniew, OPANOWSKI, Artur, STEPANOWSKA, Katarzyna, FORMICKI, Krzysztof, and WAWRZYNIAK, Wawrzyniec

Subjects
DEMERSAL zone, HYPOXEMIA, ARTIFICIAL spawning of fishes, FISH breeding, FISH feeds
Abstract

Background. The stocks of cod, Gadus morhua Linnaeus, 1758, have been declining within recent decades and the Baltic Sea is one of the most affected areas. The latter body of water with its low salinity, pollution, and vast areas of demersal hypoxia is particularly vulnerable. Areas of natural spawning are scarce and the reproductive output of cod has been irregular and more and more limited. One of the proposed solutions for this problem might be an artificial reproduction. One of such areas has been the Gdańsk Deep, but the number of potential brood fish is relatively low, which makes the eggs and sperm poorly accessible. The aim of the presently reported study was to conduct spawning and egg incubation under controlled conditions to obtain viable hatchlings and to monitor the embryonic development of cod originating from the area of the Gdańsk Deep. Materials and methods. The parental fish specimens were obtained during commercial trawl catches. The eggs were fertilized artificially at the field laboratory using filtered brackish sea water with salinity of 15%, and then were incubated at a constant temperature of 8 ± 0.5°C. Eggs and larvae development, and larvae beginning exogenous feeding were observed under a stereo microscope, and photographed regularly to determine the sizes of the eggs and larvae and to document the results of the experiment. Results. The mean percentage of fertilization of eggs was 70%. Hatching began 236 h after fertilization, and the newly hatched larvae comprised 30% of the initial stocking density. The mean length of the larvae was 3.95 mm. The cod larvae began exogenous feeding before the yolk sac was fully absorbed. Conclusion. Artificial reproduction with gametes obtained from cod spawning in the Gdańsk Deep is possible, and the fertilization rates obtained were similar to those achieved with cod from the Bornholm and Gotland basins. Therefore, our results also show that cod spawning in the Gdańsk Deep can be suggested as a model species for further research. [ABSTRACT FROM AUTHOR]

Published
2016
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