Title

Water Quality and Macroinvertebrate Response to Acidification Following Intensified Summer Droughts in a Western Australian Wetland

Document Type

Journal Article

Publisher

CSIRO

Faculty

Computing, Health and Science

School

Natural Sciences

RAS ID

600

Comments

This article was originally published as: Sommer, B., & Horwitz, P. (2001). Water quality and macroinvertebrate response to acidification following intensified summer droughts in a Western Australian wetland. Marine and Freshwater Research, 52(7), 1015-21. Original article available here

Abstract

A decline in pH from ˜6 –8 to ˜4 –5 over a period of 4 years was detected during routine monitoring of surface waters at Lake Jandabup.This was accompanied by lower water levels,shorter periods of inundation and measurable changes in other attributes of the water:sulfate,iron and ammonium concentrations increased markedly,and filterable reactive phosphorus and colour (gilvin)decreased.Macroinvertebrate family richness did not change notably over this period,but there were shifts in community structure:ostracods,isopods and oligochaete worms became less abundant;amphipods,mayflies and gastropods disappeared,while ceratopogonids (Diptera)and macrothricid cladocerans increased in abundance.Historical evidence suggests that at least one other acidification event has occurred in the recent past.Mechanisms associated with the acidification,and the wetland ’s capacity to recover from such events,are discussed.

DOI

10.1071/MF00021

 

Link to publisher version (DOI)

10.1071/MF00021