Assessment of benthic changes during 20 years of monitoring the Mexican Salina Cruz Bay

In this work a non-parametric multivariate analysis was used to assess the impact of metals and organic compounds in the macro infaunal component of the mollusks benthic community using surface sediment data from several monitoring programs collected over 20 years in Salina Cruz Bay, Mexico. The dat...

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Bibliographic Details
Published in:Environmental monitoring and assessment 2009-02, Vol.149 (1-4), p.113-132
Main Authors: González-Macías, C, Schifter, I, Lluch-Cota, D. B, Méndez-Rodríguez, L, Hernández-Vázquez, S
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Animals
Applied ecology
Atmospheric Protection/Air Quality Control/Air Pollution
Bay of Salina Cruz Mexico
Biodiversity
Biological and medical sciences
Biomarkers
Coasts
Contamination
Earth and Environmental Science
Ecology
Ecosystem
Ecotoxicology
Ecotoxicology, biological effects of pollution
Environment
Environmental Management
Environmental monitoring
Environmental Monitoring - methods
Fundamental and applied biological sciences. Psychology
General aspects
Geologic Sediments - chemistry
Heavy metals
Hydrocarbons
Invertebrates
Lead - analysis
Metals
Mexico
Mollusca
Mollusk communities
Mollusks
Monitoring/Environmental Analysis
Multivariate analysis
Organic compounds
Organisms
Physicochemical properties
Pollution
Seawater
Sediments
Studies
Surface sediments
Trends
Water Pollutants, Chemical - analysis
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Summary:In this work a non-parametric multivariate analysis was used to assess the impact of metals and organic compounds in the macro infaunal component of the mollusks benthic community using surface sediment data from several monitoring programs collected over 20 years in Salina Cruz Bay, Mexico. The data for benthic mollusks community characteristics (richness, abundance and diversity) were linked to multivariate environmental patterns, using the Alternating Conditional Expectations method to correlate the biological measurements of the mollusk community with the physicochemical properties of water and sediments. Mollusks community variation is related to environmental characteristics as well as lead content. Surface deposit feeders are increasing their relative density, while subsurface deposit feeders are decreasing with respect to time, these last are expected to be more related with sediment and more affected then by its quality. However gastropods with predatory carnivore as well as chemosymbiotic deposit feeder bivalves have maintained their relative densities along time.
ISSN:0167-6369
1573-2959
DOI:10.1007/s10661-008-0187-8