A review of potential conservation and fisheries benefits of breaching four dams in the Lower Snake River(Washington,USA)  

作　　者：Adam J.Storch Howard A.Schaller Charles E.Petrosky Robert L.Vadas Jr. Benjamin J.Clemens Gary Sprague Norman Mercado-Silva Brett Roper Michael J.Parsley Edward Bowles Robert M.Hughes Jay A.Hesse 

机构地区：[1]Oregon Department of Fish and Wildlife,Ocean Salmon and Columbia River Program,17330 Southeast Evelyn Street,Clackamas,OR 97015,USA [2]U.S.Fish and Wildlife Service,911 Northeast 11th Avenue,Portland,OR 97232,USA [3]Idaho Department of Fish and Game,600 South Walnut Street,Boise,ID 83707,USA [4]Unaffiliated,Olympia,WA,USA [5]Oregon Department of Fish and Wildlife,Corvallis Research Lab,28655 Hwy 34,Corvallis,OR 97333,USA [6]National Marine Fisheries Service,650 Capitol Mall,Sacramento,CA 95814,USA [7]Centro de Investigacion en Biodiversidad y Conservacion,Universidad Autonoma del Estado de Morelos,Av.Universidad 1001,Col.Chamilpa,C.P.62209,Cuernavaca,Morelos,Mexico [8]National Stream and Aquatic Ecology Center,U.S.Forest Service,860 North 1200 East,Logan,UT 84321,USA [9]Independent Fisheries Consultant,191 Sooter Road,Underwood,WA 98651,USA [10]Oregon Department of Fish and Wildlife,4034 Fairview Industrial Drive Southeast,Salem,OR 97302,USA [11]Amnis Opes Institute,2895 Southeast Glenn Street,Corvallis,OR 97333,USA [12]Department of Fisheries,Wildlife,&Conservation Sciences,104 Nash Hall,Corvallis,OR 97331,USA [13]Nez Perce Tribe Department of Fisheries Resources Management,120 Beaver Grade,Lapwai,ID 83540,USA

出　　处：《Water Biology and Security》2022年第2期10-22,共13页水生生物与安全（英文）

摘　　要：Abundances of important and imperiled fishes of the Snake River Basin continue to decline.We assessed the rationale for breaching the four lower Snake River Basin dams to prevent complete loss of these fishes,and to maximize their likelihood of recovery.We summarize the science surrounding Sockeye Salmon(Oncorhynchus nerka),Chinook Salmon(O.tshawytscha),steelhead(O.mykiss),Bull Trout(Salvelinus confluentus),White Sturgeon(Acipenser transmontanus),and Pacific Lamprey(Entosphenus tridentatus).From this,we drew ten conclusions:(1)development of the Columbia River System(including the Snake River Basin)has converted mainstem rivers into reservoirs,altering fish behavior and survival;(2)most populations currently record their lowest abundance;(3)the Columbia River System dams reduce productivity of diadromous fishes in the highest-quality spawning grounds that could buffer against future climate dynamics;(4)past actions have done little to reduce impacts or precipitate recovery;(5)the Columbia River System constrains survival and productivity of salmon,steelhead and Bull Trout;(6)Snake River Basin salmon and steelhead remain at high extinction risk;(7)eliminating migration impediments and improving mainstem habitats are essential for maintaining genetic diversity and improving Bull Trout persistence;(8)the lower Snake River Basin dams preclude passage of adult White Sturgeon,constraining gene flow and recruitment;(9)the lower Snake River Basin dams impede dramatically passage of adult and juvenile Pacific Lamprey,and(10)Snake River Basin Pacific Lamprey is at high risk of extirpation.Breaching the four lower Snake River Basin dams is an action likely to prevent extirpation and extinction of these fishes.Lessons from the Columbia River System can inform conservation in other impounded rivers.

关 键 词：Bull trout IMPOUNDMENT Pacific lamprey SALMON STEELHEAD White sturgeon 

分 类 号：Q178.1[生物学—水生生物学]