Changes in littoral benthic macroinvertebrate communities in relation to water chemistry in 17 Precambrian Shield lakes.
|Title||Changes in littoral benthic macroinvertebrate communities in relation to water chemistry in 17 Precambrian Shield lakes.|
|Publication Type||Journal Article|
|Year of Publication||2008|
|Authors||Lento J, Dillon PJ, Somers KM, REID RA|
|Journal||Canadian Journal of Fisheries & Aquatic Sciences|
|Pagination||906 - 918|
|Keywords||Ability, acidification, CHANGE, Chemical reactions, Community organization, Hydrogen-ion concentration, Lakes, Multivariate analysis, water chemistry|
Few studies of biological recovery from acidification have dealt with community responses to changes inwater chemistry, despite the importance of environmental tolerance and biological interactions that may only be visibleby examining the community as a whole. In this study, we examined the ability of pH and several water chemistrycovariables to explain temporal changes in the littoral benthic macroinvertebrate communities of lakes recovering fromacidification. Data from 17 lakes sampled from 1988 to 2002 were summarized using correspondence analysis andcompared using Procrustes analysis. Canonical correspondence analysis was used to examine the relationship betweenchemical variables and community structure. Benthic community composition changed over the sampling period, withsignificant year-to-year changes from 1993 to 1998. Community composition and water chemistry were highly correlatedthroughout the study period, although the strongest correlations were found from 1993 to 1997, coinciding withthe period of greatest change in the benthic community. These results suggest that benthic macroinvertebrate communitiesin these lakes have changed in response to changes in water chemistry that are consistent with recovery from acidification.