Undersampling bias: the null hypothesis for singleton species in tropical arthropod surveys.

  title={Undersampling bias: the null hypothesis for singleton species in tropical arthropod surveys.},
  author={Jonathan A. Coddington and Ingi Agnarsson and Jeremy A. Miller and Matja{\vz} Kuntner and Gustavo Hormiga},
  journal={The Journal of animal ecology},
  volume={78 3},
1. Frequency of singletons - species represented by single individuals - is anomalously high in most large tropical arthropod surveys (average, 32%). 2. We sampled 5965 adult spiders of 352 species (29% singletons) from 1 ha of lowland tropical moist forest in Guyana. 3. Four common hypotheses (small body size, male-biased sex ratio, cryptic habits, clumped distributions) failed to explain singleton frequency. Singletons are larger than other species, not gender-biased, share no particular… 

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