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@article{951893,
author = {Horsák, Michal and Hájek, Michal and Hájková, Petra and Cameron, Robert and Černohorská, Nicole and Apostolova, Iva},
article_number = {8},
keywords = {Molluscs; Spring fens; Bulgaria; Distribution; pattern; Environmental predictors; Geographical isolation},
language = {eng},
issn = {0028-1042},
journal = {Naturwissenschaften},
title = {Mollusc communities in Bulgarian fens: predictive power of the environment, vegetation, and spatial structure in an isolated habitat},
volume = {98},
year = {2011}
}
TY - JOUR
ID - 951893
AU - Horsák, Michal - Hájek, Michal - Hájková, Petra - Cameron, Robert - Černohorská, Nicole - Apostolova, Iva
PY - 2011
TI - Mollusc communities in Bulgarian fens: predictive power of the environment, vegetation, and spatial structure in an isolated habitat
JF - Naturwissenschaften
VL - 98
IS - 8
SP - 671-681
EP - 671-681
SN - 00281042
KW - Molluscs
KW - Spring fens
KW - Bulgaria
KW - Distribution
KW - pattern
KW - Environmental predictors
KW - Geographical isolation
N2 - Mollusc communities of previously unexplored Bulgarian fens were studied in order to determine and generalise the patterns of species richness and composition along the mineral richness gradient. The aim was also to compare predictive values of the environment, vegetation and spatial structure. Altogether, 44 mollusc species were recorded at 40 treeless fen sites. Species richness varied from 0 to 18 species per site, and it was positively associated with the mineral gradient and negatively with altitude. However, the best predictor was obtained using plant species composition. All explanatory variables had higher effect on land snails than on the entire mollusc assemblage (including aquatic species). Species richness and abundance were significantly and positively correlated with the species composition turnover; the communities were highly nested, with poor sites having subsets of the fauna found in the richest. The main direction of mollusc species turnover was highly associated with that observed for vegetation, and the main gradient of plant species composition was able to explain nearly 20% of total variation in mollusc data. We found that spatial structure explained by far the highest proportion of independent variation, which reflected the high level of geographical isolation of Bulgarian fens and regional differences independent of any environmental variation. Our results demonstrate (1) the general role of mineral richness gradient for structuring mollusc communities in fens, (2) the pivotal indicator role of plant species composition in predicting species composition of mollusc communities, despite being trophically independent and (3) the effect of isolation and origins of the habitat on species composition: most species have wide geographical distributions within the habitat type, and geographical patterns within Bulgaria may have a stochastic element.
ER -
HORSÁK, Michal, Michal HÁJEK, Petra HÁJKOVÁ, Robert CAMERON, Nicole ČERNOHORSKÁ a Iva APOSTOLOVA. Mollusc communities in Bulgarian fens: predictive power of the environment, vegetation, and spatial structure in an isolated habitat. \textit{Naturwissenschaften}. 2011, roč.~98, č.~8, s.~671-681. ISSN~0028-1042.
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