Zusammenfassung
Understanding the negative and positive effects of agricultural land
use for the conservation of biodiversity, and its relation to ecosystem
services, needs a landscape perspective. Agriculture can contribute
to the conservation of high-diversity systems, which may provide
important ecosystem services such as pollination and biological control
via complementarity and sampling effects. Land-use management is
often focused on few species and local processes, but in dynamic,
agricultural landscapes, only a diversity of insurance species may
guarantee resilience (the capacity to reorganize after disturbance).
Interacting species experience their surrounding landscape at different
spatial scales, which influences trophic interactions. Structurally
complex landscapes enhance local diversity in agroecosystems, which
may compensate for local high-intensity management. Organisms with
high-dispersal abilities appear to drive these biodiversity patterns
and ecosystem services, because of their recolonization ability and
larger resources experienced. Agri-environment schemes (incentives
for farmers to benefit the environment) need to broaden their perspective
and to take the different responses to schemes in simple (high impact)
and complex (low impact) agricultural landscapes into account. In
simple landscapes, local allocation of habitat is more important
than in complex landscapes, which are in total at risk. However,
little knowledge of the relative importance of local and landscape
management for biodiversity and its relation to ecosystem services
make reliable recommendations difficult.
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