Pollinating Insects-- Biology, Management and Systematics Research Site Logo
ARS Home About Us Helptop nav spacerContact Us En Espanoltop nav spacer
Printable VersionPrintable Version     E-mail this pageE-mail this page
Agricultural Research Service United States Department of Agriculture
Search
  Advanced Search
 
Programs and Projects
Subjects of Investigation
Big Data and Computing
Status of Pollinators
Research Strategy
Research Objectives
Alfalfa Leafcutting Bee
Blue Orchard Bee
Bumble Bees (Bombus)
Bumble Bee Rearing Guide
Ozone to Decontaminate Honey Bee Supers
Small Fruit Pollination
Squash Pollination
 

Research Project: POLLINATION AND THE DEVELOPMENT OF ALTERNATIVE CROP POLLINATORS

Location: Pollinating Insects-- Biology, Management and Systematics Research

Title: Effect of human disturbance on bee communities in a forested ecosystem

Authors
item Winfree, Rachel - UNIV CA AT BERKLEY,CA
item Griswold, Terry
item Kremen, Claire - UNIV CA AT BERKLEY, CA

Submitted to: Conservation Biology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: November 13, 2006
Publication Date: January 1, 2007
Citation: Winfree, R., Griswold, T.L., Kremen, C. 2007. Effect of human disturbance on bee communities in a forested ecosystem. Conservation Biology. 21(1): p.213-223.

Interpretive Summary: One of the important questions in conservation is the impact of human caused fragmentation of ecosystems on their biota. How well do species persist in human dominated ecosystems? We investigated how an important functional group, bee pollinators are affected by human land use at landscape and local scales in a naturally forested area in southern New Jersey. We looked at bee populations in 40 sites that differed in surrounding landscape cover or local habitat type. Bee abundance and species richness within forest habitat decreased, not increased, with increasing forest cover in the surrounding landscape. Similarly, bee abundance was greater in agricultural fields and suburban and urban developments than in extensive forests, and the same trend was found for species richness. Even pollinators that might be expected to show greater sensitivity to habitat loss, such as floral specialists and bees of small or large body size, did not show strong positive associations with forest habitat. Nevertheless, 18 of the 130 bee species studied were positively associated with extensive forest. One of these species is a narrow endemic that was last seen in 1939. Our results suggest that at least in this system, moderate anthropogenic land use may be compatible with the conservation of many, but not all, bee species.

Technical Abstract: It is important for conservation biologists to understand how well species persist in human dominated ecosystems because protected areas constitute a small fraction of the Earth’s surface and because anthropogenic habitats may offer more opportunities for conservation than has been previously thought. We investigated how an important functional group, pollinators (bees; Hymenoptera: Apiformes), are affected by human land use at the landscape and local scales in southern New Jersey (U.S.A.). We established 40 sites that differed in surrounding landscape cover or local habitat type and collected 2551 bees of 130 species. The natural habitat in this ecosystem is a forested, ericaceous heath. Bee abundance and species richness within forest habitat decreased, not increased, with increasing forest cover in the surrounding landscape. Similarly, bee abundance was greater in agricultural fields and suburban and urban developments than in extensive forests, and the same trend was found for species richness. Particular species groups that might be expected to show greater sensitivity to habitat loss, such as floral specialists and bees of small or large body size, did not show strong positive associations with forest habitat. Nevertheless, 18 of the 130 bee species studied were positively associated with extensive forest. One of these species is a narrow endemic that was last seen in 1939. Our results suggest that at least in this system, moderate anthropogenic land use may be compatible with the conservation of many, but not all, bee species.

   

 
Project Team
James, Rosalind
Pitts Singer, Theresa
Strange, James - Jamie
Cane, James - Jim
Griswold, Terry
 
Publications
   Publications
 
Related National Programs
  Crop Production (305)
 
 
Last Modified: 05/22/2013
ARS Home | USDA.gov | Site Map | Policies and Links 
FOIA | Accessibility Statement | Privacy Policy | Nondiscrimination Statement | Information Quality | USA.gov | White House