1. Spillover of beneficial organisms from natural habitats to croplands
can improve agro-ecosystem services, but wildlife can also negatively
influence agricultural production. When managing agricultural landscapes
to conserve biodiversity, we need to understand if the availability of
natural habitats increases ecosystem dis-services such as vertebrate seed
predation to avoid risking higher costs than benefits. 2. We studied
whether vertebrates and their impact in crop seed predation are related to
the percentage of natural (Chaparral) and semi-natural habitat (planted
forest with native and exotic trees) in an agricultural landscape of
Israel. We selected 20 almond and 20 sunflower study sites within a
landscape with varying percentages of natural (0–61%) and semi-natural
(0–70%) habitats within a 1000-m radius of their surroundings. We observed
birds, trapped rodents (in almond), counted seeds and noted feeding marks
to obtain seed predation rates, at each site. Within the almond crops, we
physically excluded birds, rodents and both to determine their relative
and combined influence on seed predation. 3. Neither vertebrate abundance
nor species richness was influenced by the percentage of natural habitat.
However, bird species richness increased with increasing percentage of
semi-natural habitat. 4. Seed predation across both crops was not
influenced by natural or semi-natural habitat but increased significantly
with increasing abundance and species richness of birds. This was also
reflected by the exclusions of birds, vertebrates and both to the almond
crop, leading to lowest seed predation when both groups were excluded. 5.
Synthesis and applications. Natural or semi-natural habitat did not
influence the agro-ecosystem dis-service of seed predation by birds and
rodents. Policymakers should consider promoting agri-environment schemes
that include the conservation of natural habitats and the management of
semi-natural habitats adjacent to cropland to enhance agro-ecosystem
services meditated by beneficial organisms like natural pest enemies and
pollinators without fearing increased vertebrate seed predation. In order
to provide more detailed management recommendations tackling the reduction
of vertebrate dis-services their feeding behaviour, metabolic needs,
behaviour patterns and local abundances should be taken into account.
Schaeckermann_et_al_RScript_JAPPLStatistics script to be used in R Software for the analyses of the data used for the publication "Natural habitat does not mediate vertebrate seed predation as an ecosystem dis-service to agriculture"Schaeckermann_RScript_JAPPL.docSchaeckermann_et_al_data_JAPPLData used for the publication "Natural habitat does not mediate vertebrate seed predation as an ecosystem dis-service to agriculture". Data for the different analyses appears on the first three tables, the fourth table offers explanations.Schaeckermann_data_JAPPL.xls
| Datum zugänglich gemacht | 21.01.2016 |
|---|
| Verlag | DRYAD |
|---|
| Geografischer Geltungsbereich | Israel |
|---|