Affordable Access

Publisher Website

Response of stream invertebrates to short-term salinization: A mesocosm approach

Authors
Journal
Environmental Pollution
0269-7491
Publisher
Elsevier
Volume
166
Identifiers
DOI: 10.1016/j.envpol.2012.03.027
Keywords
  • Aquatic Invertebrates
  • Secondary Salinization
  • Mesocosm
  • Principal Response Curve (Prc)
  • Mediterranean Streams
  • Mining Pollution
Disciplines
  • Biology
  • Design
  • Ecology

Abstract

Abstract Salinization is a major and growing threat to freshwater ecosystems, yet its effects on aquatic invertebrates have been poorly described at a community-level. Here we use a controlled experimental setting to evaluate short-term stream community responses to salinization, under conditions designed to replicate the duration (72 h) and intensity (up to 5 mS cm−1) of salinity pulses common to Mediterranean rivers subjected to mining pollution during runoff events. There was a significant overall effect, but differences between individual treatments and the control were only significant for the highest salinity treatment. The community response to salinization was characterized by a decline in total invertebrate density, taxon richness and diversity, an increase in invertebrate drift and loss of the most sensitive taxa. The findings indicate that short-term salinity increases have a significant impact on the stream invertebrate community, but concentrations of 5 mS cm−1 are needed to produce a significant ecological response.

There are no comments yet on this publication. Be the first to share your thoughts.