期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 408, 期 10, 页码 2226-2232出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2010.01.060
关键词
Babitonga Bay; Estuarine; Mangrove; Organic compounds; Stable isotopes
资金
- Region of Veneto
- UNIVILLE
The biogeochemical processes affecting the transport and cycling of terrestrial organic carbon in coastal and transition areas are still not fully understood One means of distinguishing between the sources of organic materials contributing to particulate organic matter (POM) in Babitonga Bay waters and sediments is by the direct measurement of delta C-13 of dissolved inorganic carbon (DIC) and delta C-13 and delta N-15 in the organic constituents. An isotopic survey was taken from samples collected in the Bay in late spring of 2004. The results indicate that the delta C-13 and delta N-15 compositions of OM varied from -21.7 parts per thousand to -26 2 parts per thousand. and from + 9 2 parts per thousand. to -0 1 parts per thousand, respectively. delta C-13 from DIC ranges from +0.04 parts per thousand to -12.7 parts per thousand The difference in the isotope compositions enables the determination of three distinct end-members terrestrial, marine and urban Moreover, the evaluation of source contribution to the particulate organic matter (POM) in the Bay, enables assessment of the anthropogenic impact. Comparing the depleted values of delta C-13(DIC) and delta C-13(POC) it is possible to further understand the carbon dynamic within Babitonga Bay (C) 2010 Elsevier BV All rights reserved
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