Journal Title
Title of Journal: Environmental Management
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Abbravation: Environmental Management
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Authors: Andreas Luek Joseph B Rasmussen
Publish Date: 2017/01/13
Volume: 59, Issue: 4, Pages: 652-664
Abstract
Aquatic invertebrates form the base of the consumer food web in lakes In coalmining endpit lakes invertebrates are exposed to an environment with potentially challenging physical and chemical features We hypothesized that the physical and chemical features of endpit lakes reduce critical littoral habitat and thus reduce invertebrate diversity thereby limiting the potential for these lakes to be naturalized We used a multivariate approach using principle component analysis and redundancy analysis to study relationships between invertebrate community structure habitat features and water quality in five endpit lakes and five natural lakes in the Rocky Mountain foothills of westcentral Alberta Canada Results show a significantly different invertebrate community structure was present in endpit lakes as compared with reference lakes in the same region which could be accounted for by water hardness conductivity slope of the littoral zone and phosphorus concentrations Habitat diversity in endpit lakes was also limited cover provided by macrophytes was scarce and basin slopes were significantly steeper in pit lakes Although water chemistry is currently the strongest influencing factor on the invertebrate community physical challenges of habitat homogeneity and steep slopes in the littoral zones were identified as major drivers of invertebrate community structure The addition of floating wetlands to the littoral zone of existing pit lakes can add habitat complexity without the need for largescale alterations to basing morphology while impermeable capping of wasterock and the inclusion of littoral habitat in the planning process of new pit lakes can improve the success of integrating new pit lakes into the landscapeWe would like to thank Eric Stock for support in the field and lab We would like to extend our gratitude to the Grande Cache Coal Company for their continued support for site access and technical support in the field as well as Alberta Parks for allowing us to sample within park boundaries
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