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Hedgerow rejuvenation management affects invertebrate communities through changes to habitat structure

Amy, Sam R.; Heard, Matthew S.; Hartley, Sue E.; George, Charles T.; Pywell, Richard F.; Staley, Joanna T.. 2015 Hedgerow rejuvenation management affects invertebrate communities through changes to habitat structure. Basic and Applied Ecology, 16 (5). 443-451. https://doi.org/10.1016/j.baae.2015.04.002

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Abstract/Summary

Hedgerows are an important semi-natural habitat for invertebrates and other wildlife within agricultural landscapes. Hedgerow quality can be greatly affected either by over- or under-management. Neglect of hedgerows is an increasingly important issue as traditional management techniques such as hedgelaying become economically unviable. In the UK, funding for hedge management is available under agri-environment schemes but relatively little is known about how this impacts on wider biodiversity. We used a randomised block experiment to investigate how habitat structural change, arising from a range of techniques to rejuvenate hedgerows (including more economic/mechanised alternatives to traditional hedgelaying), affected invertebrate abundance and diversity. We combined digital image analysis with estimates of foliage biomass and quality to show which aspects of hedge structure were most affected by the rejuvenation treatments. All investigated aspects of habitat structure varied considerably with management type, though the abundance of herbivores and predators was affected primarily by foliage density. Detritivore abundance was most strongly correlated with variation in hedge gap size. The results suggest that habitat structure is an important organising force in invertebrate community interactions and that management technique may affect trophic groups differently. Specifically we find that alternative methods of hedgerow rejuvenation could support abundances of invertebrates comparable or even higher than traditional hedgelaying, with positive implications for the restoration of a larger area of hedgerow habitat on a limited budget.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1016/j.baae.2015.04.002
CEH Sections/Science Areas: Pywell
Reynard
ISSN: 1439-1791
Additional Keywords: conservation hedging, functional groups, hedge-laying, higher level stewardship, wildlife hedging
NORA Subject Terms: Ecology and Environment
Agriculture and Soil Science
Date made live: 25 Jun 2015 12:51 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/511143

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