J 2016

Niche differentiation of two sibling wolf spider species, Pardosa lugubris and Pardosa alacris, along a canopy openness gradient

MICHALKO, Radek, Ondřej KOŠULIČ, Vladimír HULA and Kamila SUROVCOVÁ

Basic information

Original name

Niche differentiation of two sibling wolf spider species, Pardosa lugubris and Pardosa alacris, along a canopy openness gradient

Authors

MICHALKO, Radek (203 Czech Republic, guarantor, belonging to the institution), Ondřej KOŠULIČ (203 Czech Republic), Vladimír HULA (203 Czech Republic) and Kamila SUROVCOVÁ (203 Czech Republic)

Edition

Journal of Arachnology, 2016, 0161-8202

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10600 1.6 Biological sciences

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 0.988

RIV identification code

RIV/00216224:14310/16:00091243

Organization unit

Faculty of Science

DOI

UT WoS

000375167800005

Keywords in English

Coexistence; resource partitioning; spatial niche; body size; Lycosidae

Tags

Změněno: 26/4/2017 22:23, Ing. Andrea Mikešková

Abstract

V originále

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.