Comparison of marine spatial planning methods in Madagascar demonstrates value of alternative approaches.

PloS One
Thomas F AllnuttClaire Kremen

Abstract

The Government of Madagascar plans to increase marine protected area coverage by over one million hectares. To assist this process, we compare four methods for marine spatial planning of Madagascar's west coast. Input data for each method was drawn from the same variables: fishing pressure, exposure to climate change, and biodiversity (habitats, species distributions, biological richness, and biodiversity value). The first method compares visual color classifications of primary variables, the second uses binary combinations of these variables to produce a categorical classification of management actions, the third is a target-based optimization using Marxan, and the fourth is conservation ranking with Zonation. We present results from each method, and compare the latter three approaches for spatial coverage, biodiversity representation, fishing cost and persistence probability. All results included large areas in the north, central, and southern parts of western Madagascar. Achieving 30% representation targets with Marxan required twice the fish catch loss than the categorical method. The categorical classification and Zonation do not consider targets for conservation features. However, when we reduced Marxan targets to 16.3%, ...Continue Reading

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Citations

Nov 5, 2015·PloS One·Rafael A MagrisRobert L Pressey
Feb 25, 2014·Marine Pollution Bulletin·Serge Andréfouët, Mélanie A Hamel
Jul 4, 2018·Conservation Biology : the Journal of the Society for Conservation Biology·Isabel AfánFrancisco Ramírez
Dec 7, 2019·Science Advances·Derek P TittensorBoris Worm
Mar 30, 2020·Global Change Biology·Kristen L WilsonHeike K Lotze
Feb 20, 2021·Marine Pollution Bulletin·Laure Vaitiare AndréSerge Andréfouët

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Software Mentioned

Marxan
Marine InVEST
Marxan with Zones
MaxEnt
ENVI
Zonation

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