Title
Designing Climate-Resilient Marine Protected Area Networks by Combining Remotely Sensed Coral Reef Habitat with Coastal Multi-Use Maps
Author(s)
Maina, J.M.;Jones, K.;Hicks, C.;McClanahan, T.R;Watson, J.E.M.;Tuda, A.;Andréfouët, S.
Published
2015
Publisher
Remote Sensing
Abstract
Decision making for the conservation and management of coral reef biodiversity requires
an understanding of spatial variability and distribution of reef habitat types. Despite the existence of
very high-resolution remote sensing technology for nearly two decades, comprehensive assessment
of coral reef habitats at national to regional spatial scales and at very high spatial resolution
is still scarce. Here, we develop benthic habitat maps at a sub-national scale by analyzing large
multispectral QuickBird imagery dataset covering ~686 km2 of the main shallow coral fringing reef
along the southern border with Tanzania (4.68˝S, 39.18˝E) to the reef end at Malindi, Kenya (3.2˝S,
40.1˝E). Mapping was conducted with a user approach constrained by ground-truth data, with
detailed transect lines from the shore to the fore reef. First, maps were used to evaluate the present
management system’s effectiveness at representing habitat diversity. Then, we developed three
spatial prioritization scenarios based on differing objectives: (i) minimize lost fishing opportunity;
(ii) redistribute fisheries away from currently overfished reefs; and (iii) minimize resource use
conflicts. We further constrained the priority area in each prioritization selection scenario based
on optionally protecting the least or the most climate exposed locations using a model of exposure
to climate stress. We discovered that spatial priorities were very different based on the different
objectives and on whether the aim was to protect the least or most climate-exposed habitats.
Our analyses provide a spatially explicit foundation for large-scale conservation and management
strategies that can account for ecosystem service benefits.
Keywords
Africa;climate adaptation strategies;coral and seagrass habitat;Indian Ocean;multi-stakeholder use;Marxan;scenario analysis
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