Nonstationary environmental and community relationships in the North Pacific Ocean
Common approaches for summarizing multivariate environmental or community data assume that relationships among variables are stationary over time, and this assumption is often not tested. Here we test the hypothesis that relationships among environmental and community time series are nonstationary i...
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Online Access: | http://hdl.handle.net/10508/14684 http://hdl.handle.net/10261/318594 https://esajournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ecy.2760 https://doi.org/10.1002/ecy.2760 |
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ftcsic:oai:digital.csic.es:10261/318594 2024-02-11T09:55:01+01:00 Nonstationary environmental and community relationships in the North Pacific Ocean Litzow, Michael Ciannelli, Lorenzo Puerta, Patricia Rykaczewski, Ryan Wettstein, Justin Opiekun, Michael 2019 http://hdl.handle.net/10508/14684 http://hdl.handle.net/10261/318594 https://esajournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ecy.2760 https://doi.org/10.1002/ecy.2760 en eng Wiley Centro Oceanográfico de Baleares https://esajournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ecy.2760 http://hdl.handle.net/10508/14684 http://hdl.handle.net/10261/318594 doi:10.1002/ecy.2760 25334 open Medio Marino y Protección Ambiental Aleutian Low Centro Oceanográfico de Baleares climate community variability dimensional reduction Gulf of Alaska nonstationary relationships North Pacific Gyre Oscillation Pacific Decadal Oscillation research article 2019 ftcsic https://doi.org/10.1002/ecy.2760 2024-01-16T11:45:09Z Common approaches for summarizing multivariate environmental or community data assume that relationships among variables are stationary over time, and this assumption is often not tested. Here we test the hypothesis that relationships among environmental and community time series are nonstationary in the Gulf of Alaska ecosystem (North Pacific Ocean) over multidecadal time scales. Dynamic factor analysis (DFA) is applied to environmental and community data from before and after 1988/1989, corresponding to the timing of an abrupt decline in temporal variance of the Aleutian Low atmospheric pattern, a leading driver of Gulf of Alaska climate. Results show that covariance among local atmosphere and ocean environmental variables weakened simultaneous to the decline in Aleutian Low variance. At the same time, community-wide responses of 14 fish and crustacean populations to physical forcing weakened, as indicated by nonstationary environment–biology regression coefficients. In line with theoretical predictions, this loss of a shared response to environmental variability was accompanied by weakening community covariance. Individual populations also showed nonstationary relationships with shared trends of community variability. We conclude that assumptions of fixed environmental and community relationships are likely to produce mistaken inference in this ecosystem. Similar concerns may apply in other ecosystems subject to changing climate patterns Article in Journal/Newspaper aleutian low Alaska Digital.CSIC (Spanish National Research Council) Gulf of Alaska Pacific Ecology 100 8 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Medio Marino y Protección Ambiental Aleutian Low Centro Oceanográfico de Baleares climate community variability dimensional reduction Gulf of Alaska nonstationary relationships North Pacific Gyre Oscillation Pacific Decadal Oscillation |
spellingShingle |
Medio Marino y Protección Ambiental Aleutian Low Centro Oceanográfico de Baleares climate community variability dimensional reduction Gulf of Alaska nonstationary relationships North Pacific Gyre Oscillation Pacific Decadal Oscillation Litzow, Michael Ciannelli, Lorenzo Puerta, Patricia Rykaczewski, Ryan Wettstein, Justin Opiekun, Michael Nonstationary environmental and community relationships in the North Pacific Ocean |
topic_facet |
Medio Marino y Protección Ambiental Aleutian Low Centro Oceanográfico de Baleares climate community variability dimensional reduction Gulf of Alaska nonstationary relationships North Pacific Gyre Oscillation Pacific Decadal Oscillation |
description |
Common approaches for summarizing multivariate environmental or community data assume that relationships among variables are stationary over time, and this assumption is often not tested. Here we test the hypothesis that relationships among environmental and community time series are nonstationary in the Gulf of Alaska ecosystem (North Pacific Ocean) over multidecadal time scales. Dynamic factor analysis (DFA) is applied to environmental and community data from before and after 1988/1989, corresponding to the timing of an abrupt decline in temporal variance of the Aleutian Low atmospheric pattern, a leading driver of Gulf of Alaska climate. Results show that covariance among local atmosphere and ocean environmental variables weakened simultaneous to the decline in Aleutian Low variance. At the same time, community-wide responses of 14 fish and crustacean populations to physical forcing weakened, as indicated by nonstationary environment–biology regression coefficients. In line with theoretical predictions, this loss of a shared response to environmental variability was accompanied by weakening community covariance. Individual populations also showed nonstationary relationships with shared trends of community variability. We conclude that assumptions of fixed environmental and community relationships are likely to produce mistaken inference in this ecosystem. Similar concerns may apply in other ecosystems subject to changing climate patterns |
format |
Article in Journal/Newspaper |
author |
Litzow, Michael Ciannelli, Lorenzo Puerta, Patricia Rykaczewski, Ryan Wettstein, Justin Opiekun, Michael |
author_facet |
Litzow, Michael Ciannelli, Lorenzo Puerta, Patricia Rykaczewski, Ryan Wettstein, Justin Opiekun, Michael |
author_sort |
Litzow, Michael |
title |
Nonstationary environmental and community relationships in the North Pacific Ocean |
title_short |
Nonstationary environmental and community relationships in the North Pacific Ocean |
title_full |
Nonstationary environmental and community relationships in the North Pacific Ocean |
title_fullStr |
Nonstationary environmental and community relationships in the North Pacific Ocean |
title_full_unstemmed |
Nonstationary environmental and community relationships in the North Pacific Ocean |
title_sort |
nonstationary environmental and community relationships in the north pacific ocean |
publisher |
Wiley |
publishDate |
2019 |
url |
http://hdl.handle.net/10508/14684 http://hdl.handle.net/10261/318594 https://esajournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ecy.2760 https://doi.org/10.1002/ecy.2760 |
geographic |
Gulf of Alaska Pacific |
geographic_facet |
Gulf of Alaska Pacific |
genre |
aleutian low Alaska |
genre_facet |
aleutian low Alaska |
op_relation |
Centro Oceanográfico de Baleares https://esajournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ecy.2760 http://hdl.handle.net/10508/14684 http://hdl.handle.net/10261/318594 doi:10.1002/ecy.2760 25334 |
op_rights |
open |
op_doi |
https://doi.org/10.1002/ecy.2760 |
container_title |
Ecology |
container_volume |
100 |
container_issue |
8 |
_version_ |
1790593480385363968 |