Spatial context strongly affects community composition of both passively and actively dispersing pool invertebrates in a highly heterogeneous landscape

0511901 - BC 2020 RIV US eng J - Článek v odborném periodiku
Juračka, P. J. - Dobiáš, J. - Boukal, David S. - Šorf, M. - Beran, L. - Černý, M. - Petrusek, A.
Spatial context strongly affects community composition of both passively and actively dispersing pool invertebrates in a highly heterogeneous landscape.
Freshwater Biology. Roč. 64, č. 12 (2019), s. 2093-2106. ISSN 0046-5070. E-ISSN 1365-2427
Grant CEP: GA ČR(CZ) GA14-29857S; GA MŠMT(CZ) LM2015075; GA MŠMT(CZ) EF16_013/0001782
Grant ostatní: GA ČR(CZ) GA17-15480S
Program: GA
Institucionální podpora: RVO:60077344
Klíčová slova: dispersal limitation * freshwater pools * metacommunity ecology
Obor OECD: Ecology
Impakt faktor: 3.835, rok: 2019
Způsob publikování: Omezený přístup
https://onlinelibrary.wiley.com/doi/full/10.1111/fwb.13398

Spatial distribution of suitable habitats and dispersal abilities of the constituent taxa jointly affect the structure of metacommunities in standing freshwaters, but their relative contributions to local community structure are not fully understood. To fill this gap, we studied spatial patterns in the species richness and composition of three passively dispersing and three actively flying freshwater invertebrate groups (rotifers, microcrustaceans and molluscs vs. hemipterans, aquatic beetles and odonates) within a metacommunity system consisting of 42 fishless pools in a landscape consisting of deep valleys and steep ridges in the Kokořínsko Protected Landscape Area, Czech Republic. We hypothesized that dispersal mode modifies the extent to which these invertebrate groups are affected by dispersal barriers in such a landscape.
Following the classical island biogeography pattern, habitat size was the key characteristic influencing species richness for each of the six groups. The number of nearby aquatic habitats was also an important determinant of species richness for molluscs, crustaceans and aquatic beetles. Valley distances between localities, defined as the shortest distance that avoids crossing steep ridges, performed much better in explaining variation in species composition than Euclidean distances for all six studied groups. Spatial variables explained substantially more variation in species composition than local pool characteristics or temporal variation in all taxa except hemipterans, whose species composition was almost equally affected by local and spatial factors.
Our study showed that the landscape-level spatial structure can affect the dispersal and metacommunity assembly of both actively and passively dispersing invertebrates more than the pool characteristics or temporal scale. This unexpected outcome is likely driven by the same spatial constraints on the dispersal routes of actively flying insects and animal vectors of passive dispersers.


Trvalý link: http://hdl.handle.net/11104/0302378