Colonisation of the newly-created artificial lake medard and its surroundings by aquatic molluscs

Luboš Beran, e-mail: lubos.beran@nature.cz

Nature Conservation Agency of the Czech Republic, Regional Office Kokořínsko – Máchův kraj Protected Landscape Area Administration, Česká 149, CZ-27601 Mělnik, Czech Republic
Abstract

Lake Medard (494 ha) is a newly created artificial lake in north-western Bohemia (Czech Republic), formed in a former coal mining quarry. The colonisation of this lake by aquatic molluscs was studied by the sampling of molluscan assemblages in 2013, 2014 and 2018. Both the number of species present and population sizes increased slowly over the period of study. Most species found in this lake also occurred in the Ohře River which was used to fill the lake through an open canal. The assemblages of this lake were compared with those found in other artificial lakes created in the same way, and used to suggest the ongoing processes of succession in the assemblages. The molluscan assemblages of nearby small pools and reservoirs were poor in species; the data are used to discuss possible colonisation pathways for aquatic molluscs.

Key words
artificial lake; Medard; aquatic molluscs; colonisation
References

Beran L. 2010. Vodní měkkýši bývalého lomu Chabařovice v severních Čechách. Malacologica Bohemoslovaca 9: 26–32. Online serial at <http://mollusca.sav.sk> 16-November-2010.
Beran L. 2013. Vodní měkkýši nově vytvořeného jezera Most v severních Čechách. Malacologica Bohemoslovaca 12: 89–92. Online serial at <http://mollusca.sav.sk> 1-Dec-2013.
Beran L. 2015. Aquatic molluscs fauna of the Ohře River – an important site of Unio crassus Philipsson, 1788 (Bivalvia: Unionidae) in northwestern Bohemia. Folia Malacologica 23: 243–261. https://doi.org/10.12657/folmal.023.021
Beran L., Juřičková L., Horsák M. 2017. Mollusca (měkkýši). In: Hejda R., Farkač J., Chobot K. (eds). Červený seznam ohrožených druhů České republiky. Bezobratlí. Příroda 36. Agentura ochrany přírody a krajiny ČR, Praha, pp. 71–76.
Horsák M., Čejka T., Juřičková L., Beran L., Horáčková J., Hlaváč J. Č.,  Dvořák L., Hájek O., Divíšek J., Maňas M., Ložek V. 2018. Check-list and distribution maps of the molluscs of the Czech and Slovak Republics. – Online at <http://mollusca.sav.sk/malacology/checklist.htm>. Checklist updated at 15-December-2018, maps updated at 15-December-2018.
Kappes H., Haase P. 2012. Slow, but steady: dispersal of freshwater mollusca. Aquatic Sciences 74: 1–14. https://doi.org/10.1007/s00027-011-0187-6
Leeuwen C. H. A. van, Velde G. van der 2012. Prerequisites for flying snails: external transport potential of aquatic snails by waterbirds. Freshwater Science 31: 963–972. https://doi.org/10.1899/12-023.1
Lorencová E., Beran L., Horsáková V., Horsák M. 2015. Invasion of freshwater molluscs in the Czech Republic: time course and environmental predictors. Malacologia 59: 105–120. https://doi.org/10.4002/040.059.0107

Folia Malacologica (2019) 27: 91-100
First published on-line: 2019-06-12 00:00:00
https://doi.org/10.12657/folmal.027.010
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