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species-specific differences in coastal vulnerability model

Hello InVEST users and happy New Year.

There are differences between different species of mangroves (e.g. red
mangroves, grey mangrove, black mangrove, etc.) in terms of height and root
structure and there are some arguments that for example grey mangroves
(Avicennia marina) cannot provide the same level of protection (particularly
against storm surge) as red mangrove (Rhizophora mangle) can.

I wonder whether these differences have been considered in the coastal
vulnerability model?

I am asking this because I am thinking of using the model in an area
where the only mangroves species is grey mangrove (Avicennia marina) and I
wonder whether species-specific differences (in terms of height and root
structure) have been considered in the model to provide the outputs that are
close to the actual capacity of Avicennia marina for storm surge protection.

I would greatly appreciate your advice
and comments


  • Hi there,

    The Coastal Vulnerability model relies on the user to rank the protective benefits of habitats.  Since it is a relative index, you could capture species specific differences by ranking one species with a higher rank than another (higher rank = less protection in this case).  For example if my system had red mangrove, grey mangrove and seagrass you could assign red mangrove a rank of 1, grey mangrove a rank of 2 or 3, and seagrass a rank of 5.  Does that make sense?
  • Thanks so much Jess for your quick response.
    Yes, that makes sense. 
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