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@article{1139127,
author = {Hettenbergerová, Eva and Horsák, Michal and Chandran, Rashmi and Hájek, Michal and Zelený, David and Dvořáková, Jana},
article_number = {1/2},
doi = {http://dx.doi.org/10.4002/040.056.0227},
keywords = {calcareous fens; grasslands; molluscs; soil moisture; species optima; species richness; vegetation},
language = {eng},
issn = {0076-2997},
journal = {Malacologia},
title = {Patterns of land snail assemblages along a fine-scale moisture gradient},
volume = {56},
year = {2013}
}
TY - JOUR
ID - 1139127
AU - Hettenbergerová, Eva - Horsák, Michal - Chandran, Rashmi - Hájek, Michal - Zelený, David - Dvořáková, Jana
PY - 2013
TI - Patterns of land snail assemblages along a fine-scale moisture gradient
JF - Malacologia
VL - 56
IS - 1/2
SP - 31-42
EP - 31-42
PB - Institute of Malacology
SN - 00762997
KW - calcareous fens
KW - grasslands
KW - molluscs
KW - soil moisture
KW - species optima
KW - species richness
KW - vegetation
N2 - We studied changes of terrestrial snail assemblages over a gradient of soil moisture using 60 sampling plots in the White Carpathian Mountains of the south-eastern Czech Republic. We used within-site design to control for confounding effects of site characteristics other than humidity, and we directly measured soil moisture along nine transects at distinct locations. Each transect had from 4 to 16 plots, and it was laid down from wet calcium-rich spring fen habitats to dry meadows in the fen surroundings. We observed a sharp moisture gradient along each transect, with the measured soil moisture varying from 97% in fen plots to 19% in semi-dry grassland plots. Altogether 29 land snail species and 4,213 live individuals were collected. Species richness of land snails varied from 2 to 11 species per plot. However, we did not observe any significant linear or unimodal response of species richness or total abundances to measured soil moisture. In contrast, sharp compositional changes along studied transects were found, suggesting differences in species preference to soil moisture conditions at fine, within-site scale. Among 21 species with the frequency higher than five, 10 (after a Bonferroni correction) showed a significant response to soil moisture. Three species expressed significant affinity to drier plots, five species were more abundant in moister plots and only two species preferred middle values. In several previous studies, both linear and hump-shaped relation between soil moisture and number of land snail species were documented. This raised questions about general response of land snails to soil moisture and the importance of possible bias caused either by using only estimated values of site moisture or sampling in distinct sites differing also in other environmental factors that might potentially overtopped importance of soil moisture for land snail distribution.
ER -
HETTENBERGEROVÁ, Eva, Michal HORSÁK, Rashmi CHANDRAN, Michal HÁJEK, David ZELENÝ a Jana DVOŘÁKOVÁ. Patterns of land snail assemblages along a fine-scale moisture gradient. \textit{Malacologia}. Institute of Malacology, 2013, roč.~56, 1/2, s.~31-42. ISSN~0076-2997. Dostupné z: https://dx.doi.org/10.4002/040.056.0227.
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