Relative importance of resource quantity, isolation and habitat quality for landscape distribution of a monophagous butterfly

@article{Krauss2005RelativeIO,
  title={Relative importance of resource quantity, isolation and habitat quality for landscape distribution of a monophagous butterfly},
  author={Jochen Krauss and Ingolf Steffan‐Dewenter and Christine B. M{\"u}ller and Teja Tscharntke},
  journal={Ecography},
  year={2005},
  volume={28},
  pages={465-474}
}
Fragmentation of food resources is a major cause of species extinction. We tested the effects of habitat area, isolation and quality for the occurrence and population density of the endangered butterfly Polyommatus coridon. Polyommatus coridon larvae are monophagous on the plant Hippocrepis comosa, and both species are specialised on calcareous grassland, which is an endangered and highly fragmented habitat type in Germany. In 2001 we surveyed all known calcareous grasslands (n=298… 
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