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Title: Data from: Characterizing driver-response relationships in marine pelagic ecosystems for improved ocean management      
keywords:
thresholds
tipping points
pressure
stressor
food web
management
generalized additive models
non-linearities
Global marine ecosystems
type:
Article
description:
Scientists and resources managers often use methods and tools that assume ecosystem components respond linearly to environmental drivers and human stressor. However, a growing body of literature demonstrates that many relationships are non-linear, where small changes in a driver prompt a disproportionately large ecological response. Here we aim to provide a comprehensive assessment of the relationships between drivers and ecosystem components to identify where and when non-linearities are likely to occur. We focus our analyses on one of the best-studied marine systems, pelagic ecosystems, which allowed us to apply robust statistical techniques on a large pool of previously published studies. In this synthesis, we (1) conduct a wide literature review on single driver-response relationships in pelagic systems, (2) use statistical models to identify the degree of non-linearity in these relationships, and (3) assess whether general patterns exist in the strengths and shapes of non-linear relationships across drivers. Overall we found that non-linearities are common in pelagic ecosystems, comprising at least 52% of all driver-response relationships. This is likely an underestimate, as papers with higher quality data and analytical approaches reported non-linear relationships at a higher frequency - on average 11% more. Consequently, in the absence of evidence for a linear relationship, it is safer to assume a relationship is non-linear. Strong non-linearities can lead to greater ecological and socio-economic consequences if they are unknown (and/or unanticipated), but if known they may provide clear thresholds to inform management targets. In pelagic systems, strongly non-linear relationships are often driven by climate and trophodynamic variables, but are also associated with local stressors such as overfishing and pollution that can be more easily controlled by managers. Even when marine resource managers cannot influence ecosystem change, they can use information about threshold responses to guide how other stressors are managed and to adapt to new ocean conditions. As methods to detect and reduce uncertainty around threshold values improve, managers will be able to better understand and account for ubiquitous non-linear relationships.
ID:
oai:datadryad.org:10255/dryad.100359
accesstypes:
download
landingPage: http://hdl.handle.net/10255/dryad.100359
authentication:
none
authorization:
none
ID:
doi:10.5061/dryad.k5n98
Hunsicker ME, Kappel CV, Selkoe KA, Halpern BS, Scarborough C, Mease L, Amrhein A (2015) Characterizing driver-response relationships in marine pelagic ecosystems for improved ocean management. Ecological Applications 26(3): 651-663.
http://hdl.handle.net/10255/dryad.100359
14-2200R1
setID:
hdl_10255_3
recNum:
26
setName:
Main
dateReleased:
05-04-2016
issueDate:
20150820
accessionDate:
10-15-2015
dateCreated:
10-15-2015
abbreviation:
Dryad
ID:
SCR:005910
name:
Dryad Digital Repository
homepage: http://www.datadryad.org
ID:
SCR:005910
name:
Dryad Data Repository

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