Influence of microclimate and species interactions on the composition of plant and invertebrate communities in alpine northern Norway


Rae, D.A., Armbruster, W.S., Edwards, M.E. and Svengård-Barre, M. (2006) Influence of microclimate and species interactions on the composition of plant and invertebrate communities in alpine northern Norway. Acta Oecologica, 29, (3), 266-282. (doi:10.1016/j.actao.2005.11.007).

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Description/Abstract

We assessed the effects of both biotic processes and abiotic factors on the community
composition of vascular plant species and invertebrates at a site in northern Norway.
Plant species were assigned to functional (woody versus herbaceous) and biogeographic
(boreal versus alpine) groups. Invertebrate species were classified as either herbivore or
predator. When species interactions and effects of the abiotic environment were partitioned,
boreal species appeared to influence the distribution of alpine species and woody
species the distribution of herbaceous species. Analysis of partial correlations indicated
that facilitation was the dominant mode of interaction between the two pairs of plant
groups. Among abiotic factors, the thermal environment probably influenced all components
of the plant and invertebrate communities, except for predatory invertebrates, and
wind appeared important in determining the composition of woody and alpine components
of the plant community but not the herbaceous component. The composition of
the boreal component of the plant community apparently influenced the composition of
all invertebrate communities, except for predatory invertebrates. The composition of the
woody component of the plant community influenced the composition of both herbivore
and predator communities. The alpine plant-community composition influenced predatory
invertebrate community composition. Woody plant community composition influenced
the composition of both herbivore and predator communities. Our analytic approach,
based on two kinds of structural equation models (d-separation and path
analysis), provides a useful method for identifying the biotic as well as abiotic factors that
influence community structure.

Item Type: Article
ISSNs: 1146-609X (print)
Related URLs:
Keywords: arctic, boreal, competition, d-separation, invertebrate communities, microtopography, Norway, microclimate, path analysis, plant communities Plant functional types Radiation Tundra Invertebrate guilds
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > GE Environmental Sciences
G Geography. Anthropology. Recreation > GB Physical geography
Divisions: University Structure - Pre August 2011 > School of Geography > Environmental Processes and Change
ePrint ID: 55277
Date Deposited: 01 Aug 2008
Last Modified: 27 Mar 2014 18:38
URI: http://eprints.soton.ac.uk/id/eprint/55277

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