Hedgerows in an agri-natural landscape

Potential habitat value for native bees

Laura E. Hannon, Thomas D Sisk

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

Recent declines in North American honeybee populations have highlighted the importance of native bee conservation, and the need for research on the ecological requirements of native bees in farmland. In this study, we investigated the value of hedgerows as foraging habitat for native bees in mosaics of small-scale agriculture and natural vegetation in two riparian landscapes in southeast Arizona, USA. In the summers of 2002 and 2003, we surveyed bees and flowers in four habitats: hedgerows, agricultural fields, woodlots, and native woodland. We asked: (1) How do hedgerows compare to other available habitats in bee abundance and species richness? (2) How does bee species composition in hedgerows compare to species composition in agricultural fields and woodland? (3) How do flower resources in hedgerows compare to those in fields and woodland? We found that hedgerows were attractive foraging habitat for native bees, especially in early summer, when hedgerows tended to have higher species richness than other agricultural or natural habitats. Cumulative species richness was highest in agricultural fields, although cumulative species richness did not significantly differ among fields, hedgerows, and woodland. While bee faunas overlapped among habitats, bee assemblages in hedgerows were more similar to those in woodland than to those in fields. The hedgerow herbaceous flora was roughly intermediate to that of fields and woodland; hedgerows also supported high densities of woodland-characteristic shrubs. These flowering shrubs were important in attracting bees that were otherwise uncommon in the landscape, including some species that are potentially valuable pollinators of agricultural crops.

Original languageEnglish (US)
Pages (from-to)2140-2154
Number of pages15
JournalBiological Conservation
Volume142
Issue number10
DOIs
StatePublished - Oct 2009

Fingerprint

hedgerow
bee
Apoidea
woodlands
woodland
habitat
habitats
species diversity
species richness
flower
shrub
foraging
flowers
small-scale farming
summer
honeybee
pollinators
pollinator
honey bees
agricultural land

Keywords

  • Agricultural ecology
  • Apoidea
  • Hedgerows
  • Native bees

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Nature and Landscape Conservation

Cite this

Hedgerows in an agri-natural landscape : Potential habitat value for native bees. / Hannon, Laura E.; Sisk, Thomas D.

In: Biological Conservation, Vol. 142, No. 10, 10.2009, p. 2140-2154.

Research output: Contribution to journalArticle

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