Environmental assessment in a shallow subtidal rocky habitat: approach coupling chemical and ecological tools

Saez et al 2011

Environmental policy and legislation pursuing the protection of marine ecosystems have commonly considered pollutant content in abiotic matrices. Nevertheless, this approach does not describe the eventual effects on living organisms. The aim of this study was to couple two monitoring tools for environmental diagnostics: the chemical tool, metal concentrations in hard-bottom sediments; and the ecological

Environmental policy and legislation pursuing the protection of marine ecosystems have commonly considered pollutant content in abiotic matrices. Nevertheless, this approach does not describe the eventual effects on living organisms. The aim of this study was to couple two monitoring tools for environmental diagnostics: the chemical tool, metal concentrations in hard-bottom sediments; and the ecological tool, observations of invertebrate communities inhabiting Lessonia trabeculata holdfasts. The study was conducted during austral summer, in central Chile, in a subtidal ecosystem threatened by a sewage outfall, and was compared with a nearby control zone. Environmental assessment was conducted at three different sites with distances ranging from the outfall to 60m (there was similar site disposal in control zone). Metal levels in sediments were highest in the site closest to the outfall, decreasing with distance, and were also low in control sites. Changes found in community taxonomic diversity were consistent with the presence of the outfall, especially at 30m away. The subtidal ecosystem was polluted. It is important to incorporate these multi- and interdisciplinary approaches to environmental research and legislation in order to obtain information that represents effects at different timescales, improves field logistics and truthfully characterises environmental conditions.

Descargar y citar documento completo
Descargar DocumentoClaudio A. Sáez, Alejandro Pérez-Matus, M. Gabriela Lobos, Doris Oliva, Julio A. Vásquez & Manuel Bravo (2011): Environmental assessment in a shallow subtidal rocky habitat: approach coupling chemical and ecological tools, Chemistry and Ecology, DOI:10.1080/02757540.2011.619529
Related projects
Temperate rocky subtidal reef community reveals human impacts across the entire food web

Alejandro Pérez-Matus Andres Ospina-Alvarez Patricio A. Camus, Sergio A. Carrasco Miriam Fernandez Stefan Gelcich Natalio Godoy F.

Continue reading

Specimen collection: An essential tool

COLLECTING BIOLOGICAL specimens for scientific studies came under scrutiny when B. A. Minteer et al. [“Avoiding (re)extinction,” Perspectives, 18

Continue reading

Nest building and description of parental care behavior in a temperate reef fish, Chromis creams (Pisces: Pomacentridae)

Background: Subtle ecological and behavioral mechanisms that enhance reproduction such as nest building by animals may provide useful information

Continue reading


Global regime shift dynamics of catastrophic sea urchin overgrazing

A pronounced, widespread and persistent regime shift among marine ecosystems is observable on temperate rocky reefs as a result of sea urchin

Continue reading

Length-weight relationships for 25 kelp forest-associated fishes of northern and central Chile

Descargar y citar documento completo Length-weight relationships for 25 kelp forest-associated fishes of northern and central Chile

Continue reading

The early life history of two sympatric New Zealand octopuses: eggs and paralarvae of Octopus huttoni and Pinnoctopus cordiformis

Desc

Continue reading