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2.4.2 MANGROVE ECOREGIONAL EXERCISES COMPARATIVE ANALYSIS

WWF (Olson et al. 1996)

The conservation status of mangrove units were assessed through the following criteria: loss of habitat; large blocks of intact habitat; water quality and hydrographic integrity; rate of habitat conversion; degree of protection; degree of fragmentation; and the degree of alteration of the catchment basin (Dinerstein et al., 1995).

Although the workshop identified individual mangrove sites that had outstanding ecological or biological features, no attempt was made to rank mangrove units on the basis of their biological distinctiveness. Because of the important ecological role of mangroves, the workshop team stressed that that the conservation of all mangrove ecosystems should be a priority. (Dinerstein et al., 1995)

WWF GLOBAL 200 (Olson and Dinerstein, 1997)

The Global 200 mangrove ecoregions are composite ecoregions based on the WWF (Olson et al.) mangrove ecosystem units. These have been mapped including all units within México in different forms in Olson and Dinerstein, 1997 and in WWF, 2000.

Analysis

Very limited comparatives can be made with mangrove exercises due to the lack of other similar works. The Global 200 includes all Mexican mangrove regions within two globally important marine ecoregions (WWF, 2000).

WWF (Olson et al. 1996)

No ecological distinctiveness determined, only appropriate conservation activities.

WWF The Global 200, 1997

All inclusive

Type of Approach

Methodology

Data

Experts workshop

Qualitative joint expert on the spot assessments, lacks data-driven rigor.

MANGROVE

Experts consultation

Qualitative expert assessments, lacks data-driven rigor.

MANGROVE

Ecoregional Cartographic Base

Biogeographic Hierarchy (n) number of units for Mexico

Level at which the prioritization was carried out.

WWF (Olson et al. 1996)

Units characterized by distinctive landforms and processes.

No ecological distinctiveness Mangrove Complexes (5) determined, only

Mangrove Units (11)

appropriate conservation activities.

WWF The Global 200, 1997

2 aggregate mangrove WWF (Olson et al. 1996) ecoregions covering all Mexican units

All inclusive

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