The effects of run-of-river hydroelectric power schemes on invertebrate community composition in temperate streams and riversReport as inadecuate




The effects of run-of-river hydroelectric power schemes on invertebrate community composition in temperate streams and rivers - Download this document for free, or read online. Document in PDF available to download.

Run-of-river ROR hydroelectric power HEP schemes are often presumed to be less ecologically damaging than large-scale storage HEP schemes. However, there is currently limited scientific evidence on their ecological impact. The aim of this article is to investigate the effects of ROR HEP schemes on communities of invertebrates in temperate streams and rivers, using a multi-site Before-After, Control-Impact BACI study design. The study makes use of routine environmental surveillance data collected as part of long-term national and international monitoring programmes at 22 systematically-selected ROR HEP schemes and 22 systematically-selected paired control sites. Five widely-used family-level invertebrate metrics richness, evenness, LIFE, E-PSI, WHPT were analysed using a linear mixed effects model. The analyses showed that there was a statistically significant effect p<0.05 of ROR HEP construction and operation on the evenness of the invertebrate community. However, no statistically significant effects were detected on the four other metrics of community composition. The implications of these findings are discussed in this article and recommendations are made for best-practice study design for future invertebrate community impact studies.



Author: Gary S. Bilotta , Niall G. Burnside , Matthew D. Turley , Jeremy C. Gray , Harriet G. Orr

Source: http://plos.srce.hr/



DOWNLOAD PDF




Related documents