Final published version, 1.24 MB, PDF document
Available under license: Unspecified
Final published version
Licence: Unspecified
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Climate change decouples marine and freshwater habitats of a threatened migratory fish
AU - Lin, Hsien-Yung
AU - Bush, Alex
AU - Linke, Simon
AU - Possingham, Hugh P.
AU - Brown, Christopher J.
PY - 2017/7
Y1 - 2017/7
N2 - AimTo assess how climate change may decouple the ecosystems used by a migratory fish, and how decoupling influences priorities for stream restoration.LocationAustralia.MethodsWe modelled changes in habitat suitability under climate change in both riverine and marine habitats for a threatened diadromous species, the Australian Grayling Prototroctes maraena, using niche models. The loss of riverine habitats for Grayling was compared with or without considering the impact of climate change on adjacent marine habitats. We also asked whether considering marine climate change changed the locations where removing dams had the greatest benefit for Grayling conservation.ResultsClimate change is expected to cause local extinction in both marine and river habitats regardless of whether dams are retained or removed at the trailing edge of the Grayling's range (north‐eastern). Decoupling of habitats was most apparent in the eastern and south‐eastern portion of the Grayling's range, where ocean warming may cause a decline in the suitability of marine habitats for larvae, while many freshwater habitats retained suitable habitat for adults. Removing dams to restore connectivity between ocean and freshwater habitats was predicted to have the greatest benefit for Grayling in southern portions of their range. Under climate change, the priorities for barrier removal gradually shift towards dams at higher elevation because of increasing suitability of freshwater habitats at higher elevations.Main conclusionsOur study highlights the importance of assessing climate range shifts in multiple ecosystems for migratory species and can help inform priorities for stream restoration under a changing climate.
AB - AimTo assess how climate change may decouple the ecosystems used by a migratory fish, and how decoupling influences priorities for stream restoration.LocationAustralia.MethodsWe modelled changes in habitat suitability under climate change in both riverine and marine habitats for a threatened diadromous species, the Australian Grayling Prototroctes maraena, using niche models. The loss of riverine habitats for Grayling was compared with or without considering the impact of climate change on adjacent marine habitats. We also asked whether considering marine climate change changed the locations where removing dams had the greatest benefit for Grayling conservation.ResultsClimate change is expected to cause local extinction in both marine and river habitats regardless of whether dams are retained or removed at the trailing edge of the Grayling's range (north‐eastern). Decoupling of habitats was most apparent in the eastern and south‐eastern portion of the Grayling's range, where ocean warming may cause a decline in the suitability of marine habitats for larvae, while many freshwater habitats retained suitable habitat for adults. Removing dams to restore connectivity between ocean and freshwater habitats was predicted to have the greatest benefit for Grayling in southern portions of their range. Under climate change, the priorities for barrier removal gradually shift towards dams at higher elevation because of increasing suitability of freshwater habitats at higher elevations.Main conclusionsOur study highlights the importance of assessing climate range shifts in multiple ecosystems for migratory species and can help inform priorities for stream restoration under a changing climate.
KW - climate change
KW - freshwater ecosystem
KW - global warming
KW - marine ecosystem
KW - migration
KW - threatened species
U2 - 10.1111/ddi.12570
DO - 10.1111/ddi.12570
M3 - Journal article
VL - 23
SP - 751
EP - 760
JO - Diversity and Distributions
JF - Diversity and Distributions
SN - 1366-9516
IS - 7
ER -