A tropical bay as a reference area defined by multiple lines of evidences.

Autor: Pedreira RMA; Centro Interdisciplinar de Energia e Ambiente (CIENAM), Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, 40170-290 Salvador, BA, Brazil., Barros F; Laboratório de Ecologia Bentônica (LEB), Instituto de Biologia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, 40170-115 Salvador, BA, Brazil., Farias CO; Laboratório de Geoquímica Orgânica Marinha (LAGOM), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro, 20550-900 Rio de Janeiro, RJ, Brazil., Wagener AL; LABMAM, Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, 22453-900 Rio de Janeiro, Brazil., Hatje V; Centro Interdisciplinar de Energia e Ambiente (CIENAM), Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, 40170-290 Salvador, BA, Brazil. Electronic address: vanessa@cnpq.pq.br.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2017 Oct 15; Vol. 123 (1-2), pp. 291-303. Date of Electronic Publication: 2017 Aug 25.
DOI: 10.1016/j.marpolbul.2017.08.041
Abstrakt: References areas are sites that have undergone little or no anthropogenic impact and therefore represent the natural state of an environment. The objective of this study was to test if the Camamu Bay (CB), Bahia, can be used as a reference area for tropical coastal environments. Trace and major elements, polycyclic aromatic hydrocarbons (PAH), and the structure of the benthic macrofauna were determined. To compare the studied sites and identify the possible occurrence of anomalous concentrations, trace elements were normalized by Al and linear regressions were also performed. For all trace elements (except Cu), regressions showed a significant correlation (p<0.05) and few outliers (<3% of cases), showing that the concentrations found represent natural values for this bay. In the case of Cu, the highest concentrations were found near small municipalities, which may be associated with domestic sewage. About 60% of the organic compounds occurred at levels below the limit of quantification (<0.26ngg -1 ). The sum of PAHs was low for all stations, ranging from 1.17 to 313ngg -1 . The benthic assemblages also indicated that the CB is a healthy, well-preserved ecosystem that deserves conservation efforts. The integrated use of geochemical and biotic data supported the use of CB as a reference area. Capsule: Organic and inorganic contaminants together with macrobenthic assemblages indicated that Camamu Bay is a pristine, tropical reference area.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: