Analysis of the impacts of a water channel diversion wall on waterbirds inhabiting the western end of Lake Rotoiti, Bay of Plenty, New Zealand | Notornis and Birds New Zealand

Southern Bird

Shaw, W¹  Smith, D¹  Bycroft, C¹  McClellan, R¹  Gillies, R¹ 

关键词: Bird counts;    Lake Rotoiti;    little black shags;    Phalacrocorax melanoleucos;    water diversion;    waterfowl;   

DOI  :  

学科分类：农业科学（综合）

来源: Ornithological Society of New Zealand Inc.

【 摘 要 】

CyanobacterialbloomsinLakeRotoitihavebeenlinkedtonutrientflowsfromLakeRotoruaviatheOhauChannel.Tomitigatethis,adiversionwallwasconstructedin2008thatwasdesignedtoredirectwaterenteringLakeRotoitifromLakeRotoruaintotheKaitunaRiver.Oneconcernwaswhetherthepresenceofthediversionwallmighthaveadverseimpactsontheabundanceofbirdsusingthelake.Monthlybirdcountswereundertakenat8sitesinLakeRotoiti,over8years,andwhichspannedtheperiodbefore,duringandafterconstructionofthewall.GeneralisedlinearmixedeffectmodelsandAICwereusedtoinvestigateanyeffectsofthewallon6birdspecies.Therewasnoapparentimpactofthewallon5ofthespecies.Thesixthspecies,littleblackshag(Phalacrocoraxmelanoleucos),wasmoreabundantinsitessurroundingthewallpost-construction,andappearedtobeusingthewallforroostingandtohuntforsmelt.

【 授权许可】

Unknown