Translator Disclaimer
1 October 2011 Ground Beetle (Coleoptera: Carabidae) Phenology, Diversity, and Response to Weed Cover in a Turfgrass Ecosystem
Carmen K. Blubaugh, Victoria A. Caceres, Ian Kaplan, Jonathan Larson, Clifford S. Sadof, Douglas S. Richmond
Author Affiliations +
Abstract

Despite being fragmented and highly disturbed habitats, urban turfgrass ecosystems harbor a surprising diversity of arthropods. The suitability of turf as arthropod habitat, however, likely depends on the extent and types of pesticides and fertilizers used. For example, moderate levels of weed cover in low-input lawns may provide alternative food resources. We conducted a 2-yr field study to: 1) characterize the ground beetle (Carabidae) species assemblage in turfgrass, and 2) assess the direct and indirect effects of lawn management on carabid communities. Weed cover and beetle activity were compared among four lawn management programs: 1) consumer/garden center, 2) integrated pest management (IPM), 3) natural organic, and 4) no-input control. Nearly 5,000 carabid beetles across 17 species were collected with the predator Cyclotrachelus sodalis LeConte numerically dominating the trap catch (87% and 45% of individuals in 2005 and 2006, respectively). Populations of C. sodalis underwent a distinct peak in activity during the third week of June, whereas omnivorous and granivorous species tended to occur at far lower levels and were less variable over the season. We found no evidence for direct effects of lawn management on carabid species diversity; however, we detected an indirect effect mediated by variation in weed cover. Seed-feeding species were positively correlated with turf weeds early in 2006, whereas strictly predaceous species were not. Thus, turf management programs that lead to changes in plant species composition (i.e., herbicide regimes) may indirectly shape epigeal arthropod communities more strongly than the direct effects of insecticide use.

© 2011 Entomological Society of America
Carmen K. Blubaugh, Victoria A. Caceres, Ian Kaplan, Jonathan Larson, Clifford S. Sadof, and Douglas S. Richmond "Ground Beetle (Coleoptera: Carabidae) Phenology, Diversity, and Response to Weed Cover in a Turfgrass Ecosystem," Environmental Entomology 40(5), 1093-1101, (1 October 2011). https://doi.org/10.1603/EN11132
Received: 27 May 2011; Accepted: 29 July 2011; Published: 1 October 2011
JOURNAL ARTICLE
9 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

Share
SHARE
KEYWORDS
biological control
Carabidae
Cyclotrachelus sodalis
IPM
omnivory
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top