Many golf courses are converting out-of-play areas to meadow-like habitat to reduce mowing, irrigation, and chemical inputs. Such naturalized roughs, which often constitute 50 % or more of a course’s total acreage, support biodiversity by providing habitat for pollinators and other wildlife. This study explored the hypothesis that they also serve as reservoirs of invertebrate natural enemies whose services extend to suppress pests in adjacent mowed turf. We used vacuum sampling, pitfall traps, and ant baits to compare arthropod populations in grassland or meadow-type naturalized roughs and traditional mowed roughs at two courses, and tested for spillover of biological control using sentinel eggs or larvae of a grass-feeding caterpillar exposed near or farther from naturalized areas into mowed turf. Although some natural enemies (e.g., spiders) were more abundant in naturalized roughs, we saw no direct spillover of predation which was quite high regardless of habitat type. Most likely that is because ground-nesting ants (Lasius, Solenopsis, and Pheidole spp.), which are dominant predators in this system, were equally or more abundant in the mowed turfgrass. Herbivorous insects, too, were more abundant in naturalized roughs, so prey availability may discourage solitary ground-dwelling predators from leaving those refuges to forage in mowed areas. There was no parasitism of sentinel eggs or larvae in our trials. Despite absence of direct spillover of predation, we argue that naturalized roughs might be more purposely designed and managed to promote parasitoids, insectivorous birds, and other enemies that provide diffuse biological control services elsewhere on the course.
|Number of pages||16|
|State||Published - Jun 1 2016|
Bibliographical noteFunding Information:
We thank the staffs at Idlehour and Kearney Hill Golf Courses, Lexington, KY, for their cooperation, Adam Kesheimer, Jonathan Larson, Samantha Marksbury, and Carl Redmond for assistance with the field work, and E.R. Hoebeke for help identifying the staphylinids. E. Dobbs was supported by the Multiyear and the Daniel R. Reedy Quality Achievement Fellowships from the University of Kentucky. This research was supported in part by a grant from the United States Golf Association. This is paper no. 15-08-115 of the Kentucky Agricultural Experiment Station.
© 2016, Springer Science+Business Media New York.
- Conservation biological control
- Ecosystem services
- Habitat fragmentation
- Habitat manipulation
ASJC Scopus subject areas
- Urban Studies