Landscape themes - Habitat amount, amount of landcover, patch sizes and mosaics

4 important questions on Landscape themes - Habitat amount, amount of landcover, patch sizes and mosaics

What is meant by a "patch"?

Either a patch of habitat for a certain species or a patch of vegetation of a particular type.

Why are larger patches considered critical for succesfull nature conservation?

Because there are relationships between patchsize and
1. size and extinction proneness of individual species populations
2. species richness
3. other factors (vegetation diversity, immigration rates etc.

Are larger patches the only ones that are interesting for conservation?

No, small and medium size patches can have high ecological value as well.
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In what way is patch size relative?

A patch that would be considered small for a certain mammal can be consideren big for a beetle species.

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