Trophic niche width increases with bill-size variation in a generalist passerine: a test of niche variation hypothesis.

  title={Trophic niche width increases with bill-size variation in a generalist passerine: a test of niche variation hypothesis.},
  author={Yu-Cheng Hsu and Pei-Jen L Shaner and C S Chang and Linhua Ke and Shuh-Ji Kao},
  journal={The Journal of animal ecology},
  volume={83 2},
The niche variation hypothesis (NVH) predicts that populations with wider niches are phenotypically more variable than populations with narrower niches, which is frequently used to explain diversifying processes such as ecological release. However, not all empirical evidence supports the NVH. Furthermore, a relationship between population phenotypic variation and niche width can be caused by sexual selection or environmental gradients, which should be carefully considered along with competition… CONTINUE READING
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