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Temporal and Spatial Patterns of Epibenthic Macroinvertebrates (EMI) from the San Pedro Shelf, California: Ten‐Year Study
Author(s) -
Maurer Don,
Diener Douglas,
Robertson George,
Mengel Mike,
Gerlinger Tom
Publication year - 1998
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/iroh.19980830407
Subject(s) - outfall , species evenness , environmental science , dominance (genetics) , oceanography , invertebrate , biomass (ecology) , community structure , species richness , ecology , geography , fishery , hydrology (agriculture) , biology , geology , biochemistry , environmental engineering , gene , geotechnical engineering
Temporal and spatial changes of epibenthic macroinvertebrates (EMI) were described from a ten‐year (1985–1995) trawl study on the San Pedro Shelf, California. Community measures including number of species, individuals, biomass, dominance (DI), evenness (J'), and diversity (H' and SR) per trawl were computed for eight trawl stations representing four isobaths. Two reference stations and a test station (located at an ocean outfall) were featured in statistical analyses examining whether the outfall had any effect on EMI. During the ten‐year period 127,389 individuals provided 106 EMI taxa. Water depth was the most important factor affecting EMI composition. Although some statistically significant differences in EMI community measures among trawl stations were found. differences between the outfall and both reference stations were either insignificant or inconsistent, providing no obvious ecological impacts attributable to the outfall.