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Assessing benthic health under multiple human pressures in B ohai B ay ( C hina), using density and biomass in calculating AMBI and M ‐ AMBI
Author(s) -
Cai Wenqian,
Borja Ángel,
Liu Lusan,
Meng Wei,
Muxika Iñigo,
Rodríguez José Germán
Publication year - 2014
Publication title -
marine ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 58
eISSN - 1439-0485
pISSN - 0173-9565
DOI - 10.1111/maec.12067
Subject(s) - benthic zone , biomass (ecology) , environmental science , ecosystem , estuary , land reclamation , ecology , environmental chemistry , chemistry , biology
Abstract In recent decades, China has undergone an impressive development, which has produced increasing human pressures including coastal degradation. Bohai B ay, located in the west of the B ohai S ea (north of C hina), has been affected by various human pressures, including waste water discharges, land reclamation and oil exploitation. To monitor the effects of these pressures on this ecosystem, benthic macroinvertebrates and environmental variables (dissolved oxygen, nutrients, metals, etc.) were sampled in 2009 and 2011. To assess the ecological status of the benthic communities, the AZTI M arine B iotic I ndex ( AMBI ) and multivariate‐ AMBI ( M ‐ AMBI ) were used, including both density and biomass in the calculation. This is the first research in which M ‐ AMBI based on biomass ( M ‐b AMBI ) is applied. Both methods showed that the nearshore areas, especially close to the H aihe and J iyun estuaries, were affected by human pressures, with a clear gradient of decreasing impacts offshore. The ecological status as assessed using density and biomass was quite similar. Significant relationships were also found between both methods and environmental variables. The use of AMBI and M ‐ AMBI , based upon density and biomass, in assessing the ecological status of water bodies in C hina seems to be promising.