Temporal changes of habitat selection during a flood contribute population persistence of aquatic organisms-論文・刊行物検索

作成年度	2015 年度
論文名	Temporal changes of habitat selection during a flood contribute population persistence of aquatic organisms
論文名（和訳）
論文副題
発表会	Gravel Bed Rivers 8
誌名	Gravel Bed Rivers 8：
巻・号・回
発表年月日	2015/09/14 ～ 2015/09/18

所属研究室／機関名	著者名（英名）
国立研究開発法人土木研究所自然共生研究センター	Masanao Sueyoshi
	Futoshi Nakamura
国立研究開発法人土木研究所自然共生研究センター	Yuichi Kayaba

抄録
Hydraulicdisturbances(i.e.,floods)arekeydeterminantsfortheformationofinstreamhabitatsandaquaticorganismcommunities.Aquaticorganismsactivelyandpassivelyescapefromextremeflowscharacterizedbyfastcurrentsandstrongshearstress,therebycontributingtheirpopulationpersistence.However,itisunclearwhethertheymovetothehabitatsthatarethesameorsimilarenvironmentsatbaseflow,ormovetothehabitatsdifferentfrombaseflowenvironment.Inthisstudy,weobservedhabitatcharacteristics(flowcurrents,waterdepthandsubstratecoarseness)ofaquaticinsectspeciesbefore,duringandafterafloodandclarifiedwhetherthehabitatselectiondiffersamongflowconditions.Asaresult,habitatchangesaccordingtoflowconditionswerespecies-dependent,andsomespeciesselecteddifferenthabitatcharacteristics(e.g.,flowcurrents)dependingonflowconditions,whichsuggestedthattheymaytemporarilyuseunsuitablehabitatsduringaflooddisturbance.Thus,weshouldcarefullyquantifyhabitatavailabilityforthetargetspeciesinchangingflowconditions.

抄録

Hydraulicdisturbances(i.e.,floods)arekeydeterminantsfortheformationofinstreamhabitatsandaquaticorganismcommunities.Aquaticorganismsactivelyandpassivelyescapefromextremeflowscharacterizedbyfastcurrentsandstrongshearstress,therebycontributingtheirpopulationpersistence.However,itisunclearwhethertheymovetothehabitatsthatarethesameorsimilarenvironmentsatbaseflow,ormovetothehabitatsdifferentfrombaseflowenvironment.Inthisstudy,weobservedhabitatcharacteristics(flowcurrents,waterdepthandsubstratecoarseness)ofaquaticinsectspeciesbefore,duringandafterafloodandclarifiedwhetherthehabitatselectiondiffersamongflowconditions.Asaresult,habitatchangesaccordingtoflowconditionswerespecies-dependent,andsomespeciesselecteddifferenthabitatcharacteristics(e.g.,flowcurrents)dependingonflowconditions,whichsuggestedthattheymaytemporarilyuseunsuitablehabitatsduringaflooddisturbance.Thus,weshouldcarefullyquantifyhabitatavailabilityforthetargetspeciesinchangingflowconditions.

論文・刊行物検索

詳細情報

発表　Temporal changes of habitat selection during a flood contribute population persistence of aquatic organisms

論文・刊行物検索

詳細情報

発表 Temporal changes of habitat selection during a flood contribute population persistence of aquatic organisms

発表　Temporal changes of habitat selection during a flood contribute population persistence of aquatic organisms