A global synthesis reveals biodiversity-mediated benefits for crop production
Dainese et al., 2019
Dainese et al., 2019
Human land use threatens global biodiversity and compromises multiple
ecosystem functions critical to food production. Whether crop
yield–related ecosystem services can be maintained by a few dominant
species or rely on high richness remains unclear. Using a global
database from 89 studies (with 1475 locations), we partition the
relative importance of species richness, abundance, and dominance for
pollination; biological pest control; and final yields in the context of
ongoing land-use change. Pollinator and enemy richness directly
supported ecosystem services in addition to and independent of abundance
and dominance. Up to 50% of the negative effects of landscape
simplification on ecosystem services was due to richness losses of
service-providing organisms, with negative consequences for crop yields.
Maintaining the biodiversity of ecosystem service providers is
therefore vital to sustain the flow of key agroecosystem benefits to
society.
Distribution of analyzed studies and effects of richness on ecosystem services provisioning.(A)
Map showing the size (number of crop fields sampled) and location of
the 89 studies (further details of studies are given in table S1). (B) Global effect of pollinator richness on pollination (n = 821 fields of 52 studies). (C) Global effect of natural enemy richness on pest control (n
= 654 fields of 37 studies). The thick line in each plot represents the
median of the posterior distribution of the model. Light gray lines
represent 1000 random draws from the posterior. The lines are included
to depict uncertainty of the modeled relationship.
.
No hay comentarios:
Publicar un comentario