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Tannins and nitrogen dynamics in mangrove leaves at different age and decay stages (Jiulong River Estuary, China)

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Tannins and nitrogen dynamics in mangrove leaves at different age and decay stages (Jiulong River Estuary, China).htm (400bytes)
Date
2007
Author
Lin, Yi Ming
林益明
Liu, Jin Wen
Xiang, Ping
Lin, Peng
林鹏
Ding, Zhen Hua
丁振华
da Silveira Lobo Sternberg, Leonel( Univ Miami, Dept Biol, Coral Gables, FL 33124 USA)
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  • 生命科学-已发表论文 [5901]
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Abstract
Changes in the total phenolics, condensed tannins (CT), protein-precipitable phenolics content and protein precipitation capacity were determined on mangrove leaves representing a range of maturation and senescence in the Jiulong River Estuary, Fujian, China. The results showed that the total phenolics, extractable condensed tannins, total condensed tannins, protein-precipitable phenolics content and protein precipitation capacity in young leaves were higher than those in mature and senescent leaves. With leaf maturation and senescence, total pehnolics decreased. The rapid loss of phenolics observed following senescence and abscission can be ascribed to leaching and degradation. Protein-bound CT and fibre-bound CT tended to increase with leaf maturity, and decreased with senescence. Protein-bound CT and fibre-bound CT increased with leaf decomposition, with CT binding more strongly to protein than to fibre. The increases in nitrogen contents and ash free caloric values, and declines in total phenolics and total condensed tannins of mangrove leaf litter suggests that partially decomposed mangrove detritus is a palatable heterotrophic substrate, and thus may be an important source of matter and energy for the estuarine food web.
Citation
Hydrobiologia ,Volume 583, Number 1, 285-295
URI
http://dx.doi.org/doi:10.1007/s10750-006-0568-3
https://dspace.xmu.edu.cn/handle/2288/10664

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