Food web structure and biocontrol in a four-trophic level system across a landscape complexity gradient.

@article{Gagic2011FoodWS,
  title={Food web structure and biocontrol in a four-trophic level system across a landscape complexity gradient.},
  author={Vesna Gagic and Teja Tscharntke and Carsten F. Dormann and Bernd Gruber and Anne Wilstermann and Carsten Thies},
  journal={Proceedings. Biological sciences},
  year={2011},
  volume={278 1720},
  pages={
          2946-53
        }
}
Decline in landscape complexity owing to agricultural intensification may affect biodiversity, food web complexity and associated ecological processes such as biological control, but such relationships are poorly understood. Here, we analysed food webs of cereal aphids, their primary parasitoids and hyperparasitoids in 18 agricultural landscapes differing in structural complexity (42-93% arable land). Despite little variation in the richness of each trophic group, we found considerable changes… CONTINUE READING
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