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Mapping vegetation

Maps on marine benthic vegetation distribution and abundance is a key component for sustainable management and planning of coastal areas! The question is how to get them.

In principle there are two fundamentally different approaches, direct or predictive mapping. In order to produce comprehensive maps of vegetation from direct measurements, it is necessary that the distribution can be measured using some kind of remote sensing technique or that the area is sufficiently small that it allows a complete ground-based survey.

Predictive mapping is a good alternative
Predictive mapping is the only alternative if the level of detail, environmental conditions or costs limits the collection of data to small-scale sampling of a tiny fraction of the area of interest.

Depending on the purpose of maps, on the available information or on the methods to be used for sampling, the first step in predictive mapping is to choose between predicting the distribution (presence vs. absence) or abundance (cover or biomass) of the type of vegetation of interest.

Direct mapping?

The focus of PREHAB web resource is predictive mapping. Some information about direct mapping on macrovegetation is found here.


PREHAB recommendations

Within PREHAB we have evaluated predictive mapping of macrovegetation under a wide range of environmental conditions in five or four? different areas of the Baltic.

Read our recommendations here about:
1. General predictive power
2. Differences among (in predicting different) organisms
3. Differences among types of habitats (in predicting habitats)
4. Regional differences
5. Sample size
6. Best method

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