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@article{1357181,
author = {Michalko, Radek and Košulič, Ondřej and Hula, Vladimír and Surovcová, Kamila},
article_number = {1},
doi = {http://dx.doi.org/10.1636/M15-46.1},
keywords = {Coexistence; resource partitioning; spatial niche; body size; Lycosidae},
language = {eng},
issn = {0161-8202},
journal = {Journal of Arachnology},
title = {Niche differentiation of two sibling wolf spider species, Pardosa lugubris and Pardosa alacris, along a canopy openness gradient},
url = {http://www.bioone.org/doi/abs/10.1636/M15-46.1},
volume = {44},
year = {2016}
}
TY - JOUR
ID - 1357181
AU - Michalko, Radek - Košulič, Ondřej - Hula, Vladimír - Surovcová, Kamila
PY - 2016
TI - Niche differentiation of two sibling wolf spider species, Pardosa lugubris and Pardosa alacris, along a canopy openness gradient
JF - Journal of Arachnology
VL - 44
IS - 1
SP - 46-51
EP - 46-51
SN - 01618202
KW - Coexistence
KW - resource partitioning
KW - spatial niche
KW - body size
KW - Lycosidae
UR - http://www.bioone.org/doi/abs/10.1636/M15-46.1
L2 - http://www.bioone.org/doi/abs/10.1636/M15-46.1
N2 - Phylogenetic niche conservatism can cause strong interspecific competition among closely related species leading to competitive exclusion from local communities or meta-communities. However, the coexistence of close relatives is often reported. One of the most frequent mechanisms mediating such coexistence is resource partitioning. Here, we investigated the niche differentiation of two sibling spider species, Pardosa alacris C.L. Koch, 1833 and P. lugubris Walckenaer, 1802, along a canopy openness gradient. We further investigated differences in body size as an additional axis for niche partitioning. We explored niche partitioning along the canopy openness gradient at eight locations. In each afforested location, 60-m-long transects were established consisting of five pitfall traps placed at regular 15-m intervals along the gradient. We measured the body size of individuals of both species collected at the gradient's extremes. We found that the two Pardosa species occurred syntopically but had clearly differentiated spatial niches along the canopy openness gradient. Pardosa lugubris displayed a preference for closed canopies in dense forest habitats and its abundance gradually decreased as the canopy opened while the opposite was the case for P. alacris. The two species also differed in body size. Each species was larger at its preferred gradient extreme than was the other species. The coexistence of the two Pardosa species was mediated mainly by spatial niche partitioning. Body size differences may represent another axis for niche partitioning.
ER -
MICHALKO, Radek, Ondřej KOŠULIČ, Vladimír HULA and Kamila SUROVCOVÁ. Niche differentiation of two sibling wolf spider species, Pardosa lugubris and Pardosa alacris, along a canopy openness gradient. \textit{Journal of Arachnology}. 2016, vol.~44, No~1, p.~46-51. ISSN~0161-8202. Available from: https://dx.doi.org/10.1636/M15-46.1.
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