Do native white-clawed crayfish impact macroinvertebrate assemblages in Mediterranean limestone headwaters? | Knowledge and Management of Aquatic Ecosystems

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Table 2

Total effects for the variables monitored in the mesocosm-based field study in relation to sampling time, crayfish density and their interactions.

Variable	Sampling time		Crayfish density		ST × CD

	p	ɳ ²	p	ɳ ²	p	ɳ ²
Total richness	NS		NS		**	0.439
EPT richness	**	0.313	NS		**	0.438
Total abundance	NS		NS		*	0.383
Total biomass	NS		NS		*	0.404
Dominance	NS		NS		NS
Margalef's diversity index	*	0.267	NS		NS

Significant results are highlighted with *(p < 0.05) or **(p < 0.01), and corresponding magnitude of effect (η ²) expressed. NS = Non-significant results.

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