Indirect effects of pesticides, operating through the food chain, have been proposed as a possible causal factor in the decline of farmland birds. To demonstrate such a link, evidence is needed of (1) an effect of food abundance on breeding performance or survival; (2) an effect of breeding performance or survival on population change; and (3) pesticide effects on food resources, sufficient to reduce breeding performance or survival, and hence to affect the rate of population change.
Indirect effects of pesticides, operating through the food chain, have been proposed as a possible causal factor in the decline of farmland birds. To demonstrate such a link, evidence is needed of (1) an effect of food abundance on breeding performance or survival; (2) an effect of breeding performance or survival on population change; and (3) pesticide effects on food resources, sufficient to reduce breeding performance or survival, and hence to affect the rate of population change.
Authors: ND Boatman et al (2004), Ibis 146, 131-143
http://www.bio-nica.info/Biblioteca/Boatman2004EffectOfPesticides.pdf
Farmland birds:
http://www.northtyneside.gov.uk/pls/portal/NTC_PSCM.PSCM_Web.download?p_ID=29094
Geef een reactie