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المؤلفM.E.M., Walton
المؤلفAl-Maslamani, I.
المؤلفChatting, M.
المؤلفSmyth, D.
المؤلفCastillo, A.
المؤلفSkov, M.W.
المؤلفLe Vay, L.
تاريخ الإتاحة2020-11-08T10:38:04Z
تاريخ النشر2020-10-03
اسم المنشورScience of The Total Environment
المعرّفhttp://dx.doi.org/10.1016/j.scitotenv.2020.142677
الاقتباسM.E.M. Walton, I. Al-Maslamani, M. Chatting, et al., Faunal mediated carbon export from mangroves in an arid area, Science of the Total Environment, https://doi.org/10.1016/j.scitotenv.2020.142677
الرقم المعياري الدولي للكتاب00489697
معرّف المصادر الموحدhttps://www.sciencedirect.com/science/article/pii/S0048969720362069
معرّف المصادر الموحدhttp://hdl.handle.net/10576/16945
الملخصThe outwelling paradigm argues that mangrove and saltmarsh wetlands export much excess production to downstream marine systems. However, outwelling is difficult to quantify and currently 40–50% of fixed carbon is unaccounted for. Some carbon is thought outwelled through mobile fauna, including fish, which visit and feed on mangrove produce during tidal inundation or early life stages before moving offshore, yet this pathway for carbon outwelling has never been quantified. We studied faunal carbon outwelling in three arid mangroves, where sharp isotopic gradients across the boundary between mangroves and down-stream systems permitted spatial differentiation of source of carbon in animal tissue. Stable isotope analysis (C, N, S) revealed 22–56% of the tissue of tidally migrating fauna was mangrove derived. Estimated consumption rates showed that 1.4% (38 kg C ha−1 yr−1) of annual mangrove litter production was directly consumed by migratory fauna, with <1% potentially exported. We predict that the amount of faunally-outwelled carbon is likely to be highly correlated with biomass of migratory fauna. While this may vary globally, the measured migratory fauna biomass in these arid mangroves was within the range of observations for mangroves across diverse biogeographic ranges and environmental settings. Hence, this study provides a generalized prediction of the relatively weak contribution of faunal migration to carbon outwelling from mangroves and the current proposition, that the unaccounted-for 40–50% of mangrove C is exported as dissolved inorganic carbon, remains plausible.
راعي المشروعQatar National Research Foundation, National Priorities Research Programme research grant: NPRP 7 - 1302 - 1 - 242
اللغةen
الناشرElsevier
الموضوعTrophic relay
Mangrove
Carbon budget
Outwelling hypothesis
Mangrove litter
Carbon flux
Fish
Food webs
العنوانFaunal mediated carbon export from mangroves in an arid area
النوعArticle
Open Access user License http://creativecommons.org/licenses/by/4.0/
dc.accessType Open Access


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