Skip to main content
padlock icon - secure page this page is secure

Implications of species loss in freshwater fish assemblages

Buy Article:

$52.00 + tax (Refund Policy)

Freshwater systems are vulnerable to pollution and species loss often ensues. Are there additional implications for assemblage structure? Here we use Berger-Parker d, Simpson's 1/D and Simpson's E to measure the ecological diversity of pristine and perturbed freshwater fish assemblages in Trinidad, West Indies, and Oklahoma, USA. Although the impacted sites typically had fewer species than expected, they could not be distinguished from unperturbed ones of equivalent richness. Changes in the evenness of these assemblages are thus driven by changes in richness. One practical outcome is that diversity indices may not provide independent verification of the detrimental consequences of pollution. The similarity in structure of naturally and anthropogenically impoverished assemblages provides no grounds for complacency, however, since it ignores the evolutionary history of the species concerned. On the basis of our results we suggest that species provenance may be important in tests of ecological function. Moreover, these investigations should replicate natural patterns of evenness as well as richness.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Publication date: December 1, 2001

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more