Spatial Analysis

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Spatial Analysis

Interactions between plants (small scale )

Effect on animal grazing pattern (
cause or effect?)

Effect of soil & topography (
large and small scales)

effect on pests & disease

b=block size, evidence of spatial pattern, indepandant from p or g

p=patch size

g=gap size

p+g=2b

in reality, patches usually are not circular, and have poorly defined boundaries

b is most easily determined

p and g will vary with method used

p+g¹2b

for multi-species data

a) species can have the same b, but different p & g, and can be positively or negatively correlated

b) species might have different b

Principle component analysis can be used to show the species contributing to the dominant spatial pattern

Principle component analysis of 5 species

For a combined analysis of all species, a spatial pattern emerged (PC1).

The spatial pattern was dominated by alfalfa, but included a negative correlation with litter and other spp.

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Interactions between plants (small scale ) Effect on animal grazing pattern ( cause or effect?) Effect of soil & topography ( large and small scales) effect on pests & disease

		b=block size, evidence of spatial pattern, indepandant from p or g p=patch size g=gap size p+g=2b
in reality, patches usually are not circular, and have poorly defined boundaries b is most easily determined p and g will vary with method used p+g¹2b



for multi-species data a) species can have the same b, but different p & g, and can be positively or negatively correlated b) species might have different b Principle component analysis can be used to show the species contributing to the dominant spatial pattern
		Principle component analysis of 5 species For a combined analysis of all species, a spatial pattern emerged (PC1). The spatial pattern was dominated by alfalfa, but included a negative correlation with litter and other spp.