Restoring pollinator communities and pollination services in hedgerows in intensively managed agricultural landscapes
The Ecology of Hedgerows and Field Margins (pp.163 - 185)
Native wild pollinators are as important as managed honeybees for the production of pollinator-dependent crops. However, the demand for pollination services in intensively managed agricultural lands often outstrips the supply. Re-diversifying agricultural lands through hedgerow plantings could help to promote native pollinators and deliver pollination services into adjacent fields. This review assesses whether hedgerows support native pollinator populations and export pollination services to crops or concentrate existing pollinators in the landscape, thereby competing with crops. Existing evidence based on a suite of indicators (resource, temporal, spatial, and functional) largely supports the exporter hypothesis, but many research gaps exist. Substantial evidence exists showing that hedgerows provide floral resources across the season and that pollinator communities track this resource, but few studies of nesting resources exist. Studies from one region show that pollinator population dynamics are enhanced by hedgerows across years, leading to enhanced alpha, beta, and functional diversity. The few studies on pollination services are positive or neutral.
Author(s): Kremen, K, Albrecht, M, Ponisio, L
Journal: The Ecology of Hedgerows and Field Margins (pp.163 - 185)