Percorrer por autor "Zajac, Katarzyna"
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- Conservation status of freshwater mussels in Europe: state of the art and future challengesPublication . Lopes-Lima, Manuel; Sousa, Ronaldo; Geist, Juergen; Aldridge, David C.; Araujo, Rafael; Bergengren, Jakob; Bespalaya, Yulia V.; Bódis, Erika; Burlakova, Lyubov E.; Van Damme, Dirk; Douda, Karel; Froufe, Elsa; Georgiev, Dilian; Gumpinger, Clemens; Karatayev, Alexander Y.; Kebapçi, Ümit; Killeen, Ian; Lajtner, Jasna; Larsen, Bjørn M.; Lauceri, Rosaria; Legakis, Anastasios; Lois, Sabela; Lundberg, Stefan; Moorkens, Evelyn A.; Motte, Gregory; Nagel, Karl Otto; Ondina, Paz; Outeiro, Adolfo; Paunovic, Momir; Prié, Vincent; Proschwitz, Ted von; Riccardi, Nicoletta; Rudzīte, Mudīte; Rudzītis, Māris; Scheder, Christian; Seddon, Mary; Şereflişan, Hülya; Simić, Vladica; Sokolova, Svetlana; Stoeckl, Katharina; Taskinen, Jouni; Teixeira, Amílcar; Thielen, Frankie; Trichkova, Teodora; Varandas, Simone; Vicentini, Heinrich; Zajac, Katarzyna; Zając, Tadeusz; Zogaris, StamatisFreshwater mussels of the Order Unionida provide important ecosystem functions and services, yet many of their populations are in decline. We comprehensively review the status of the 16 currently recognized species in Europe, collating for the first time their life-history traits, distribution, conservation status, habitat preferences, and main threats in order to suggest future management actions. In northern, central, and eastern Europe, a relatively homogeneous species composition is found in most basins. In southern Europe, despite the lower species richness, spatially restricted species make these basins a high conservation priority. Information on freshwater mussels in Europe is unevenly distributed with considerable differences in data quality and quantity among countries and species. To make conservation more effective in the future, we suggest greater international cooperation using standardized protocols and methods to monitor and manage European freshwater mussel diversity. Such an approach will not only help conserve this vulnerable group but also, through the protection of these important organisms, will offer wider benefits to freshwater ecosystems.
- Fishing for hosts: larval spurting by the endangered thick-shelled river mussel, Unio crassusPublication . Aldridge, David C.; Brian, Joshua I.; Cmiel, Adam; Lipinska, Anna; Lopes-Lima, Manuel; Sousa, Ronaldo; Teixeira, Amílcar; Zajac, Katarzyna; Zając, TadeuszUnderstanding the life-history characteristics of endangered species is crucial to their conservation, management, and predicting their responses to environmental change (Stark et al., 2004). Host specificity is central to the evolutionary diversification and conservation of the Unionida (Barnhart et al., 2008; Modesto et al., 2018). In the North American mussels of the Ambleminae subfamily, specificity toward a restricted host fish range that shares the same microhabitat as the mussel has resulted in remarkable morphologies and behaviors that dramatically increase the likelihood of attachment and successful transmission of larvae (glochidia).
- Remarkable reprodutive spurting behaviour of endangered thick shelled river mussel, Unio crassusPublication . Aldridge, David C.; Cmiel, Adam; Lipinska, Anna; Lopes-Lima, Manuel; Sousa, Ronaldo; Teixeira, Amílcar; Zajac, Katarzyna; Zając, TadeuszFreshwater mussels (Unionida) dominate the biomass and are important keystone organisms in many rivers, yet they are declining precipitously worldwide. Their dispersal is facilitated by possession of parasitic larvae (glochidia) which typically encyst and metamorphose on the gills and fins of host fishes. Long eo-evolutionary histories in some North American mussels has resulted in specificity towards single host fish species that share the same microhabitat as the mussel and has led to the development of lures and behaviours that dramatically increase the likelihood of attachment and successful transmission. Elsewhere in the world, mussels are typically more generalist in host use and thought to release glochidia freely into the water column without using specific lures and attractants. Here we show that the endangered European thick shelled river mussel, Unio crassus, displays a remarkable spurting behaviour where females migrate to river margins and project jets of water up to 1m back into the channel. Spurted material carries glochidia and attracts larval host fishes thus increasing the likelihood of successful transmission. Mature glochidia remain viable for up to 48 hours and carry long larval threads, which can wrap around fixed and floating debris thus keeping the glochidia within the water column. This unique spurting behaviour may explain the disappearance of U. crassus from regulated rivers, where margins have been lost through impoundment, or where increased sporadic discharges displace gravid females from shallow water. The reproductive behaviour of many endangered freshwater mussels is largely unknown but may be central to explaining the dramatic decline in these important ecosystem engineers.
- A roadmap for the conservation of freshwater mussels in EuropePublication . Sousa, Ronaldo; Zając, Tadeusz; Halabowski, Dariusz; Aksenova, Olga V.; Bespalaya, Yulia V.; Carvalho, Francisco; Castro, Paulo S.; Douda, Karel; Silva, Janine P.; Ferreira-Rodríguez, Noé; Geist, Juergen; Gumpinger, Clemens; Labecka, Anna M.; Lajtner, Jasna; Lewin, Iga; Lopes-Lima, Manuel; Meira, Alexandra; Nakamura, Keiko; Nogueira, Joana Garrido; Ondina, Paz; Ożgo, Małgorzata; Reis, Joaquim; Riccardi, Nicoletta; Shumka, Spase; Son, Mikhail O.; Teixeira, Amílcar; Thielen, Frankie; Urbańska, Maria; Varandas, Simone; Wengström, Niklas; Zajac, Katarzyna; Zieritz, Alexandra; Aldridge, David C.Europe has a long history of human pressure on freshwater ecosystems. As pressure continues to grow and new threats emerge, there is an urgent need for conservation of freshwater biodiversity and its ecosystem services. However, whilst some taxonomic groups, mainly vertebrates, have received a disproportionate amount of attention and funds, other groups remain largely off the public and scientific radar. Freshwater mussels (Bivalvia, Unionida) are an alarming example of this conservation bias and here we point out six conceptual areas that need immediate and long-term attention: knowledge, threats, socioeconomics, conservation, governance and education. The proposed roadmap aims to advance research, policy and education by identifying the most pressing priorities for the short- and long-term conservation of freshwater mussels across Europe.