Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
This study evaluated the burrowing activity of U. cordatus and its effects on Fe, Cu and Zn fractionation, bioavailability and bioaccumulation in a semiarid mangrove area (Cear� state, NE-Brazil). Were analyzed the Eh; pH; grain size and pore water composition; total S and organic C, and the speciation of Fe, Cu and Zn solid-phases in two areas: a densely populated crab and a control site. The burrowing activity and seasonal variation affect the biogeochemical conditions of mangrove soils increasing metals bioavailability and bioaccumulation. The crab burrows favors the entrance of oxygen into the soil, oxidizing the pyrite and forming poorly-crystalline Fe minerals, increasing the risks of biocontamination. Furthermore, the metals content in the hepatopancreas are a good proxy for the evaluation of bioavailable metal forms and, thus, further studies must be conducted in order to evaluate the potential use of U. cordatus as a bioindicator for trace metals contamination. � 2016
Departamento de Ci�ncias do Solo, Universidade Federal do Cear�, UFC, Fortaleza, Cear�, Brazil; Departamento de Ci�ncia do Solo, Escola Superior de Agricultura Luiz de Queiroz (ESALQ/USP), Piracicaba, S�o Paulo, Brazil; Departamento de Biologia, Universidade Federal do Cear�, UFC, Fortaleza, Cear�, Brazil; Departamento de Edafolox�a e Qu�mica Agr�cola, Faculta de Biolox�a, Universidade de Santiago de Compostela, Santiago de Compostela, Spain; Departamento de Tecnolog�a de Ciencia de los Alimentos y Biotecnolog�a, Universidad Polit�cnica Nacional, Quito, Ecuador
Recommended Citation:
Ara�jo J�nior J.M.D.C.,Ferreira T.O.,Suarez-Abelenda M.,et al. The role of bioturbation by Ucides cordatus crab in the fractionation and bioavailability of trace metals in tropical semiarid mangroves[J]. Marine Pollution Bulletin,2016-01-01,111(2018-01-02)