The effects of catchment land use on water quality and macroinvertebrate assemblages in Otara Creek, New Zealand

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dc.contributor.authorShilla, Dativa
dc.contributor.authorShilla, Daniel
dc.date.accessioned2016-07-21T18:30:26Z
dc.date.available2016-07-21T18:30:26Z
dc.date.issued2011-09
dc.descriptionFull text can be accessed at http://www.tandfonline.com/doi/pdf/10.1080/02757540.2011.575374en_US
dc.description.abstractThe effect of catchment land use on water quality and macroinvertebrate communities was examined by using data gathered during a 2004 reconnaissance of nine sites in the Otara Creek, New Zealand. Data collected included macroinvertebrate, water chemistry and sediments characteristics. Macroinvertebrate data were used in metric and index calculations. A total of 61 macroinvertebrate taxa, with 3032 total individuals, were identified from the macroinvertebrates samples collected from nine sites in Otara Creek. The greatest number of macroinvertebrate taxa was recorded within bush sites (mean>25), while the urban sites had the least number of taxa (mean=10). Pasture sites were intermediate with the mean>17. Taxa number differed significantly across land use. Mean macroinvertebrates abundance varied across the sites and land uses. The highest macroinvertebrates mean abundance was recorded in urban and pasture sites, while bush sites had significantly lower mean abundance. Physico-chemical parameters decreased from bush toward urban streams. Biotic indices were sensitive to changes in macroinvertebrates community structure across land uses with mean scores decreasing from bush to urban and pasture streams. Ordination of biological data showed a clear separation of bush from urban and pastures streams. Analysis of similarities revealed significant differences in macroinvertebrates between both stream groups and land-use groups. The observed macroinvertebrate assemblage pattern was best correlated with a single variable, conductivity, temperature, turbidity, nitrate and dissolved oxygen. The combination of these environmental variables best explained the changes in the macroinvertebrate assemblages between sites. This study demonstrates that catchment land use may significantly affect the water quality and macroinvertebrate communities in an ecosystem.en_US
dc.identifier.citationShilla, D.J. and Shilla, D.A., 2011. The effects of catchment land use on water quality and macroinvertebrate assemblages in Otara Creek, New Zealand. Chemistry and Ecology, 27(5), pp.445-460.en_US
dc.identifier.doi10.1080/02757540.2011.575374
dc.identifier.urihttp://hdl.handle.net/20.500.11810/3382
dc.language.isoenen_US
dc.subjectCatchmenten_US
dc.subjectLand use changeen_US
dc.subjectWater qualityen_US
dc.subjectMacroinvertebratesen_US
dc.subjectOtara Creeken_US
dc.titleThe effects of catchment land use on water quality and macroinvertebrate assemblages in Otara Creek, New Zealanden_US
dc.typeJournal Articleen_US
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