scholarly journals Příspěvek k poznání vodních měkkýšů Vsetínské Bečvy a okolí (Česká republika) [Contribution to the knowledge of aquatic molluscs of the Vsetínská Bečva River and its surroundings (Czech Republic)]

2007 ◽  
Vol 6 ◽  
pp. 38-47
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Dreissena Polymorpha ◽  
Native Species ◽  
Potamopyrgus Antipodarum ◽  
Aquatic Habitats ◽  
Gravel Pit ◽  
Large Populations ◽  
Physella Acuta

This paper brings a review of a malacological survey of the Vsetínská Bečva River, its tributaries, canals and other different aquatic habitats in surroundings (Eastern Moravia, Czech Republic). Vsetínská Bečva is a 58 km long river which rises in 870 m a.s.l. and joins Rožnovská Bečva River in Valašské Meziříčí at 288 m asl. Research was focused on endangered bivalve Unio crassus. Aquatic molluscs at 63 sites were studied in 2007. Altogether 19 species of aquatic molluscs (12 gastropods, 7 bivalves) were found. Three non-native species Potamopyrgus antipodarum, Physella acuta, and Gyraulus parvus, which are rare in Moravia, were found. Occurrence of vulnerable but in this region relatively common prosobranch Bythinella austriaca was confirmed in springs and rivulets. Research based on bivalves provided more interesting results. Existence of two large populations of Unio crassus were documented in two canals (mill races) in Hovězí and Vsetín. Populations of Unio crassus were estimated at 1500–2500 individuals in Hovězí and 1000–4000 individuals in Vsetín. Occurrence of young individuals of Unio crassus were confirmed in both cases. Rare bivalves Pisidium amnicum and P. moitessierianum were found at one site in Canal in Vsetín and also non-native Dreissena polymorpha was found at one site – the gravel pit near Nový Hrozenkov.

scholarly journals Vodní měkkýši Malé Bečvy (Česká republika) [Aquatic molluscs of the Malá Bečva River (Czech Republic)]

2007 ◽  
Vol 6 ◽  
pp. 29-34 ◽  
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Endangered Species ◽  
Native Species ◽  
Potamopyrgus Antipodarum ◽  
Anodonta Cygnea ◽  
High Nutrient ◽  
Large Populations ◽  
Unio Tumidus ◽  
Sinanodonta Woodiana

This paper brings a review of a malacological survey of Malá Bečva River (Central Moravia, Czech Republic). Malá Bečva is a canal 18 km long and approximately 7 m wide, which runs from the Bečva River near Troubky and flows into the Mostěnka stream (influent to the Bečva River) in altitude 190 m. Aquatic molluscs sites were studied in 2007 at 9 sites. Altogether 23 species of aquatic molluscs (9 gastropods, 14 bivalves) were found. Except non-native species Potamopyrgus antipodarum, which is rare in Moravia, only the occurrence of common and widespread gastropods was documented, while research based on bivalves provided more interesting results. Large populations of three endangered species Unio crassus, Pisidium amnicum, and P. moitessierianum were documented. Population of Unio crassus was estimated at 5000-20000 individuals. This species and also Pisidium amnicum occurred only in the upper part of the Malá Bečva River from Troubky to Chropyně. Aquatic malacofauna of this part showed similarity with Strhanec Canal, which is canal of the Bečva River situated less than 10 km upstream of the Malá Bečva River. Bivalves Unio tumidus, Sinanodonta woodiana, Sphaerium rivicola, S. corneum and also Anodonta cygnea and Pseudanodonta complanata occur only downstream of Chropyně. This change of the malacofauna is probably caused by high nutrient tributary flows into the Malá Bečva River near Chropyně.

scholarly journals Příspěvek k poznání vodních měkkýšů evropsky významné lokality Bystřice se zaměřením na populaci velevruba tupého (Unio crassus) [A contribution to the knowledge of aquatic molluscs of the Bystřice SCI focused on the population of Unio crassus]

2011 ◽  
Vol 10 ◽  
pp. 10-17
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Population Density ◽  
Native Species ◽  
Potamopyrgus Antipodarum ◽  
Widespread Species ◽  
Physella Acuta

This paper brings results of a malacological survey of the Bystřice River on the territory of the Site of Community Importance (SCI) Bystřice (Eastern Bohemia, Czech Republic). The research was focused on the population of endangered bivalve Unio crassus which is the main object of conservation of this SCI. Twenty one species of aquatic molluscs (11 gastropods, 10 bivalves) were found in 2010. Most of the molluscs belong to common and widespread species. Altogether 26 species have been found during research in the Bystřice River since 2000. Expansion of non-native species Potamopyrgus antipodarum and Physella acuta is the most visible change in comparison with the previous research. The research in 2010 confirmed existence of the occurrence of Unio crassus all over the SCI and also upstream of this site. The population density documented in 2010 was higher than that found during the previous research. In the upper part of the SCI, the density of U. crassus population was at least 1 ind./1 m of the river stream while in the lower part it did not exceed 1 ind. per 10 m of the river. The reason was the canalisation of the river and the absence of suitable sediments. The occurrence of the bivalve was not recorded downstream of the SCI.

scholarly journals Hitchhiking Exotic Clam: Dreissena polymorpha (Pallas, 1771) Transported via the Ornamental Plant Trade

Diversity ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 410
Author(s):  
Jiří Patoka ◽  
Barbora Patoková
Keyword(s):  
Czech Republic ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Native Species ◽  
Ornamental Plant ◽  
Decision Makers ◽  
The Czech Republic ◽  
Tropical Regions ◽  
Invasive Mussel ◽  
Ornamental Species

Ornamental aquaculture is one of the main sources of non-native species worldwide. Unintentionally transported “hitchhiking” organisms have been previously recorded; although most of these species are transported from tropical regions, here we report on the first accidental transport of the zebra mussel (Dreissena polymorpha) in a shipment of ornamental Aegagropila linnaei (Chlorophyta) from Russia to the Czech Republic. This invasive mussel is listed on the national blacklist of alien species in the Czech Republic and can be easily released in outdoor garden ponds together with A. linnaei. Since the Czech Republic is known to be a gateway for aquatic ornamental species from a European perspective, re-export to other European countries is also possible. Thus, the spread of D. polymorpha via this pathway cannot be excluded. This finding should be of importance to conservationists, traders, decision-makers and other stakeholders.

scholarly journals Vodní měkkýši Labe mezi Pardubicemi a Hřenskem [Aquatic molluscs of the Elbe River between Pardubice and Hřensko (Czech Republic)]

2005 ◽  
Vol 3 ◽  
pp. 78-88
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Dreissena Polymorpha ◽  
Native Species ◽  
Corbicula Fluminea ◽  
Elbe River ◽  
Bithynia Tentaculata ◽  
Sphaerium Corneum ◽  
Theodoxus Fluviatilis ◽  
The Elbe River ◽  
Radix Auricularia

Aquatic molluscs of the Elbe River between Němčice (near Pardubice, Eastern Bohemia, Czech Republic) and Hřensko (Northern Bohemia, Czech Republic) at 27 localities were investigated from 1994 to 2004. Altogether 40 species (24 gastropods, 16 bivalves) from 77 species known on the territory of the Czech Republic were found at sites under study. A gradual invasion of 6 non-native species (Potamopyrgus antipodarum, Physella acuta, Menetus dilatatus, Ferrissia clessiniana, Corbicula fluminea) and an extinction of another species (Theodoxus fluviatilis, Planorbis carinatus, Unio crassus, Pisidium amnicum) were documented in comparison with historical records. Rare mussel Pseudanodonta complanata and rare pea mussel Pisidium moitessierianum were found at several localities under study and these finds document survival of these bivalves in the Elbe River. Molluscan communities of particular localities were most often usually compounded from species Viviparus viviparus (downstream of loc. 9), Bithynia tentaculata, Radix auricularia, Radix ampla, Unio pictorum, Anodonta anatina, Corbicula fluminea (downstream of loc. 8), Sphaerium rivicola (downstream of loc. 7), Sphaerium corneum s. lat., Pisidium supinum, Dreissena polymorpha.

scholarly journals Biodiversity of macrozoobenthos some running waters of southern Moravia

2010 ◽  
Vol 58 (2) ◽  
pp. 303-310
Author(s):  
Ivo Sukop
Keyword(s):  
Water Quality ◽  
Czech Republic ◽  
New Zealand ◽  
Dreissena Polymorpha ◽  
Climate Changes ◽  
Potamopyrgus Antipodarum ◽  
Running Waters ◽  
Southern Moravia

The present work gives the results of the research of macrozoobenthos some running waters drai­na­ge areas of the Dyje River (southern Moravia – Czech Republic). Altogether, 762 taxa of macrozoobenthos were determined from the running waters of southern Moravia. Porifera (3), Hydrozoa (3), Turbellaria (8), Nematoda (14), Nematomorpha (1), Oligochaeta (60), Hirudinea (18), Bryozoa (5), Mollusca (44), Isopoda (2), Amphipoda (4), Decapoda (2), Hydracarina (17), Ephemeroptera (65), Plecoptera (55), Odonata (26), Heteroptera (3), Plannipennia (2), Trichoptera (128), Coleoptera (59), Diptera (243). Some taxa of macrozoobenthos are extinct unfortunately in running waters of Southern Moravia at present time. Another ones appear newly, for example snail Potamopyrgus antipodarum from New Zealand or Dreissena polymorpha from Pontic region. The data presented in this paper may serve as a basis for future monitoring of water quality and zoobenthos composition in connection with presumption of climate changes.

scholarly journals Vodní malakofauna dolního toku Lužnice se zaměřením na stav populace velevruba tupého (Unio crassus) [Aquatic molluscan fauna of the lower part of the Lužnice River (South Bohemia, Czech Republic) with focus on the population of Unio crassus]

2012 ◽  
Vol 11 ◽  
pp. 13-21
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Native Species ◽  
The Other ◽  
The Czech Republic ◽  
Other Hand ◽  
Molluscan Fauna ◽  
Physella Acuta ◽  
South Bohemia ◽  
Sinanodonta Woodiana

This paper presents results of a malacological survey of the Lužnice River in ca 70 km long stretch between the inflow of its main tributary the Nežárka River in Veselí nad Lužnicí and its confluence with the Vltava River in Southern Bohemia (Czech Republic). Thirty-one species of aquatic molluscs (19 gastropods, 12 bivalves) representing 40% of freshwater molluscan fauna of the Czech Republic were found at 15 sites. Differences of molluscan assemblages upstream and downstream of Tábor town were probably caused by different characters of the watercourse. The occurrence of rare bivalve Pseudanodonta complanata was confirmed. On the other hand, two non-native species Physella acuta and Sinanodonta woodiana were recorded. The research was preferentially focused on the population of the endangered bivalve Unio crassus. Its occurrence was confirmed at 8 from 15 sites under study but altogether only 31 individuals were found. Less than four specimens were found at particular sites but one.

scholarly journals Vodní měkkýši Labe mezi Pardubicemi a Hřenskem [Aquatic molluscs of the Elbe River between Pardubice and Hřensko (Czech Republic)]

2005 ◽  
Vol 3 ◽  
pp. 78-88
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Dreissena Polymorpha ◽  
Native Species ◽  
Corbicula Fluminea ◽  
Elbe River ◽  
Bithynia Tentaculata ◽  
Sphaerium Corneum ◽  
Theodoxus Fluviatilis ◽  
The Elbe River ◽  
Radix Auricularia

Aquatic molluscs of the Elbe River between Němčice (near Pardubice, Eastern Bohemia, Czech Republic) and Hřensko (Northern Bohemia, Czech Republic) at 27 localities were investigated from 1994 to 2004. Altogether 40 species (24 gastropods, 16 bivalves) from 77 species known on the territory of the Czech Republic were found at sites under study. A gradual invasion of 6 non-native species (Potamopyrgus antipodarum, Physella acuta, Menetus dilatatus, Ferrissia clessiniana, Corbicula fluminea) and an extinction of another species (Theodoxus fluviatilis, Planorbis carinatus, Unio crassus, Pisidium amnicum) were documented in comparison with historical records. Rare mussel Pseudanodonta complanata and rare pea mussel Pisidium moitessierianum were found at several localities under study and these finds document survival of these bivalves in the Elbe River. Molluscan communities of particular localities were most often usually compounded from species Viviparus viviparus (downstream of loc. 9), Bithynia tentaculata, Radix auricularia, Radix ampla, Unio pictorum, Anodonta anatina, Corbicula fluminea (downstream of loc. 8), Sphaerium rivicola (downstream of loc. 7), Sphaerium corneum s. lat., Pisidium supinum, Dreissena polymorpha.

Invasion of Lake Erie Offshore Sediments by Dreissena, and Its Ecological Implications

1993 ◽  
Vol 50 (11) ◽  
pp. 2298-2304 ◽  
Author(s):  
R. Dermott ◽  
M. Munawar
Keyword(s):  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Lake Erie ◽  
Quagga Mussel ◽  
Central Basin ◽  
Eastern Basin ◽  
Fine Sediments ◽  
Ecological Implications ◽  
Large Populations ◽  
Hard Substrates

Large populations of the exotic rounded (noncarinate) shelled mussel of the genus Dreissena were found to exist on soft sediments collected throughout the central and eastern basins of Lake Erie during July and August 1992. Two different phenotypes were present on fine sediments (<150 μm) in the eastern basin. An elongated white morph was common on the profundal sediments beyond 40 m depth, while the "quagga" mussel was common on sand and sandy silt at depths between 10 and 30 m. Together with the carinated zebra mussel Dreissena polymorpha, which is very abundant on hard substrates in the sublittoral region, at least 80% of Lake Erie's bottom sediments have been invaded by Dreissena. Only that region of the central basin (near Cleveland) which undergoes periodic summer anoxia was not inhabited by this genus.

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
New York ◽  
Dreissena Polymorpha ◽  
Native Species ◽  
Environmental Changes ◽  
Fish Assemblages ◽  
Hudson River ◽  
Osmerus Mordax ◽  
Shoreline Development ◽  
Rainbow Smelt ◽  
River Fish

<em>Abstract.</em>—The main channel of the Hudson River is a tidal estuary from its mouth in New York Harbor to Troy, New York, 247 km upstream. It drains about 35,000 km<sup>2</sup> and is an important navigational, commercial, and recreational system. Since the arrival of European settlers over 400 years ago, it has undergone numerous environmental changes. These changes have included channel maintenance by dredging, wholesale dumping of industrial and domestic wastes, scattered in-basin urbanization and shoreline development, deforestation of the watershed and an increase in agriculture, and water removal for commercial, industrial, and agricultural needs. In addition, the biota of the river has supported commercial and recreational harvesting, exotic species have become established, and habitats have become fragmented, replaced, changed in extent, or isolated. The tidal portion of the Hudson River is among the most-studied water bodies on Earth. We use data from surveys conducted in 1936, the 1970s, the 1980s, and the 1990s to examine changes in fish assemblages and from other sources dating back to 1842. The surveys are synoptic but use a variety of gears and techniques and were conducted by different researchers with different study goals. The scale of our assessment is necessarily coarse. Over 200 species of fish are reported from the drainage, including freshwater and diadromous species, estuarine forms, certain life history stages of primarily marine species, and marine strays. The tidal Hudson River fish assemblages have responded to the environmental changes of the last century in several ways. Several important native species appear to be in decline (e.g., rainbow smelt <em>Osmerus mordax </em>and Atlantic tomcod <em>Microgadus tomcod</em>), others, once in decline, have rebounded (e.g., striped bass <em>Morone saxatilis</em>), and populations of some species seem stable (e.g., spottail shiner <em>Notropis hudsonius</em>). No native species is extirpated from the system, and only one, shortnose sturgeon <em>Acipenser brevirostrum</em>, is listed as endangered. The recent establishment of the exotic zebra mussel <em>Dreissena polymorpha </em>may be shifting the fish assemblage away from openwater fishes (e.g., <em>Alosa</em>) and toward species associated with vegetation (e.g., centrarchids). In general, the Hudson River has seen an increase in the number and importance of alien species and a change in dominant species.

scholarly journals Grasshoppers, crickets (Orthoptera) and earwigs (Dermaptera) of Tovačov gravel pit (central Moravia, Czech Republic): New locality for several thermophilous species in anthropogenic secondary habitat

2015 ◽  
Vol 64 (3) ◽  
pp. 199-205
Author(s):  
Filip Trnka ◽  
Stanislav Rada
Keyword(s):  
Czech Republic ◽  
Endangered Species ◽  
Spatial Expansion ◽  
The Czech Republic ◽  
Industrial Areas ◽  
Mole Cricket ◽  
Gravel Pit ◽  
Tree Cricket ◽  
Secondary Habitats ◽  
Post Industrial

Abstract Study of Orthoptera and earwigs was conducted in Tovačov gravel pit in 2014. We have recorded 18 species of Orthoptera and 3 species of earwigs. The most significant recorded species are Cepero’s ground-hopper (Tetrix ceperoi), pygmy mole cricket (Xya variegata), Italian tree cricket (Oecanthus pellucens) and riparian earwig (Labidura riparia). Tovačov gravel pit poses the northernmost locality of T. ceperoi and X. variegata in the Czech Republic and the northernmost known locality in Moravia for O. pellucens. For the L. riparia, we present a founding from Tovačov together with another finding from Olomouc vicinity, which is currently the northernmost locality within Moravia. Our findings display recent spatial expansion of some thermophilous species. Moreover, we emphasize importance of (post)-industrial areas as secondary habitats for specialised endangered species.

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