Structural Changes in Macroinvertebrate Communities Associated with Reduction in the Management of Coastal Saltpans

Table 5

Significant Pearson correlation coefficients 𝑟 (Pearson 𝑟,𝑃<.05) between abiotic variables, and total abundance, diversity indices, relative abundance, and percentage of organic matter in macroinvertebrate communities.

	Max_depth	Mean_depth	Salt	OM in sediments (%)
Total abundance	𝑟=0.42,𝑃<.05	𝑟=0.42,𝑃<.05	n.s.	𝑟=−0.48,𝑃<.05
Species richness	n.s.	n.s.	𝑟=0.42,𝑃<.05	𝑟=0.50,𝑃<.01
Margalef index	n.s.	n.s.	n.s.	𝑟=0.60,𝑃<.01
Shannon-Wienner	𝑟=−0.41,𝑃<.05	𝑟=−0.57,𝑃<.01	n.s.	𝑟=0.70,𝑃<.001
Pielou’s eveness	𝑟=−0.46,𝑃<.05	𝑟=−0.59,𝑃<.01	n.s.	𝑟=0.62,𝑃<.01
Simpson’s index	n.s.	𝑟=−0.53,𝑃<.01	n.s.	𝑟=0.63,𝑃<.01
Relative abundance (COR-N)	n.s.	𝑟=0.42,𝑃<.05	n.s.	n.s.
OM in macroinvertebrates (%)	n.s.	n.s.	n.s.	𝑟=0.52,𝑃<.05

Legend: Max_depth - maximum water depth (cm); Mean_depth: mean water depth (cm); Salt: salt concentration in water (%); OM: percentage of organic matter (%); COR-N: Corixidae nymph; n.s.: non significant.