29 شهریور 1400
اسماعيل عباسي

اسماعیل عباسی

مرتبه علمی: استادیار
نشانی: پژوهشکده خلیج فارس - گروه محیط زیست
تحصیلات: دکترای تخصصی / اقلیم شناسی
تلفن: 07731222230
دانشکده: پژوهشکده خلیج فارس

مشخصات پژوهش

عنوان Variability of organic carbon matter and nitrogen deposits in a carbonate platform of mangroves
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
Climate change, δ13C, δ15N, mangrove forest sediment, organic carbon
مجله Journal of Wildlife and Biodiversity
شناسه DOI
پژوهشگران هانا اعتمادی (نفر اول) ، نرجس اوکاتی (نفر دوم) ، اسماعیل عباسی (نفر سوم)

چکیده

Mangroves are usually characterized by their high potential for long-term sequestration of organic carbon. Sediment accretion by these valuable habitats increased their capability of organic carbon sequestration. In this study, we aimed to examine the organic carbon sequestration of mangrove expansion (Avicennia germinans) in southern Iran. Different variables have been investigated in the sampled sediments, including δ13C, δ 15N, TOC, TN, and C/N ratio. Our findings indicated the significant variation of measured variables in several top intervals, reflecting the existence of autochthonous and allochthonous organic substances. Our data showed that the minority of δ13C values are lower than -23% in the S3 site, suggesting that mangrove litter is a critical input OC (δ13C, -28 to -30%). On the other hand, the significantly higher value of δ 13C (-14 to -23%) indicates that phytoplankton and possibly local microphytobenthos are the primary sources of organic materials inputs. Moreover, site S4 presents the highest mean value of C/N, TN, and δ15N, which can be justified because of its proximity to the estuary and supply of organic matters imported from algal sources. The substantial role of mangrove forests depositing organic carbon should be investigated in the global carbon cycle.