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Prioritizing global marine mammal habitats using density maps in place of range maps

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Ecography2013.pdf (3.818Mb)
Date
04/03/2014
Author
Williams, Robert
Grand, Joanna
Hooker, Sascha Kate
Buckland, Stephen Terrence
Reeves, Randall R.
Rojas-Bracho, Lorenzo
Sandilands, Doug
Kaschner, Kristin
Funder
European Commission
Grant ID
253407
Keywords
Marine systems
Range maps
Density maps
Marine mammal habitats
Species richness
Conservation
QL Zoology
QA Mathematics
BDY
R2C
SDG 14 - Life Below Water
SDG 15 - Life on Land
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Abstract
Despite lessons from terrestrial systems, conservation efforts in marine systems continue to focus on identifying priority sites for protection based on high species richness inferred from range maps. Range maps oversimplify spatial variability in animal distributions by assuming uniform distribution within range and de facto giving equal weight to critical and marginal habitats. We used Marxan ver. 2.43 to compare species richness-based systematic reserve network solutions using information about marine mammal range and relative abundance. At a global scale, reserve network solutions were strongly sensitive to model inputs and assumptions. Solutions based on different input data overlapped by a third at most, with agreement as low as 10% in some cases. At a regional scale, species richness was inversely related to density, such that species richness hotspots excluded highest-density areas for all species. Based on these findings, we caution that species-richness estimates derived from range maps and used as input in conservation planning exercises may inadvertently lead to protection of largely marginal habitat.
Citation
Williams , R , Grand , J , Hooker , S K , Buckland , S T , Reeves , R R , Rojas-Bracho , L , Sandilands , D & Kaschner , K 2014 , ' Prioritizing global marine mammal habitats using density maps in place of range maps ' , Ecography , vol. 37 , no. 3 , pp. 212-220 . https://doi.org/10.1111/j.1600-0587.2013.00479.x
Publication
Ecography
Status
Peer reviewed
DOI
https://doi.org/10.1111/j.1600-0587.2013.00479.x
ISSN
0906-7590
Type
Journal article
Rights
Copyright © 2013 The Authors. Ecography published by Nordic Society Oikos. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
RW collected the BC data with Raincoast Conservation Foundation, and was supported by a Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme (proposal no. 253407 (call reference: FP7‐PEOPLE‐2009‐IIF)) during the analysis stage.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/4068

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