Management of field margins to maximize multiple ecological services
Article first published online: 3 NOV 2006
Journal of Applied Ecology
Volume 44, Issue 1, pages 13–21, February 2007
How to Cite
OLSON, D. M. and WÄCKERS, F. L. (2007), Management of field margins to maximize multiple ecological services. Journal of Applied Ecology, 44: 13–21. doi: 10.1111/j.1365-2664.2006.01241.x
- Issue published online: 3 NOV 2006
- Article first published online: 3 NOV 2006
- Received 22 November 2005; final copy received 22 July 2006 Editor: Davy McCracken
- ecological services;
- insect conservation;
- northern bobwhite;
- plant succession;
- vegetative buffers
- 1Vegetative buffers in agricultural landscapes can provide a range of important ecological services, including conservation of native flora and fauna, enhancement of biological pest control and reduction of agrochemical drift. Typically, studies addressing the impact of such vegetative elements focus on one particular benefit. We investigated whether the benefits of field margins that had been established for conservation of northern bobwhite quail Colinus virginianus populations extended to the enhancement of biological pest control in adjacent conservation tillage cotton fields.
- 2Densities of a selection of insect species and the predation and parasitism rates of insect pest species were measured in first- and second-year field margins established for bobwhite quail as well as in an adjacent cotton crop.
- 3Second-year field margins yielded higher densities of all species sampled, with the exception of staphylinids and cotton aphids. Despite this, thrips and their predator, Orius insidiosus, were the only species that were also more abundant in the adjacent cotton field. Tachinids and Trichogramma and Lygus species, appeared to prefer the field margin vegetation over the cotton.
- 4Overall, the impact of second-year margins on the cotton crop did not significantly differ from first-year margins with regard to pest occurrence or biological control.
- 5Analysis of the sugar content in Meteorus autographae, a generalist parasitoid of Lepidoptera larvae, suggested that this species is severely food-limited in the field margins established for bobwhite quail.
- 6Synthesis and applications. This study shows that field margins designed to specifically benefit bobwhite quail may be unsuitable for providing other ecological services. By making small adjustments in the vegetative composition of these field margins, such as adding early season nectar-producing plants, it may be feasible to combine biodiversity and pest-control benefits and thereby optimize the overall ecological services to be gained.