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Streamside buffers are edge-affected habitat for ground-dwelling forest beetle assemblages


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Baker, SC and Barmuta, LA and Grove, SJ and Richardson, AMM (2009) Streamside buffers are edge-affected habitat for ground-dwelling forest beetle assemblages. Biodiversity and Conservation, 18. pp. 3467-3482.

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Reservation of forest in riparian buffers is common practice in commercial
forestry areas worldwide, potentially providing valuable habitat for biodiversity dependent
on mature forest. However, the habitat value of narrow reserve corridors can be compromised
by edge effects. We investigated the habitat value of streamside buffers in wet
eucalypt forest for ground-dwelling beetles in Tasmania, Australia. Beetles were collected
with pitfall traps in five replicates of four habitats: unlogged corridors of mature forest in
streamside reserves (buffers) with clearfelling-derived logging regeneration either side;
continuous mature upslope forest; continuous mature riparian forest; and \20-year-old
upslope clearfelling-derived logging regeneration. Streamside reserve widths on each side
of the stream were on average 40 ± 6 m (±95% CI) from reserve edge to stream. Beetle
assemblages in logging regeneration differed substantially from those in the unlogged
habitats, including the streamside reserves. Streamside reserve assemblages nevertheless
differed from those of the continuous unlogged areas. Assemblage composition in
streamside reserves was most similar to that in continuous mature riparian forest, although
beetle diversity was higher in the reserves. Our results suggest that although streamside
reserves provide habitat for the majority of commonly collected beetle species occurring in
continuous mature forest, wider reserve corridors in the wet eucalypt forests of Tasmania
may be required to provide habitat that is not edge-affected.

Item Type: Article
Journal or Publication Title: Biodiversity and Conservation
Page Range: pp. 3467-3482
Identification Number - DOI: 10.1007/s10531-009-9655-x
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Date Deposited: 14 Jul 2011 05:20
Last Modified: 18 Nov 2014 04:20
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