QQ客服 官方微博 反馈留言

	Nutrient and caloric dynamics in Avicennia marina leaves at different developmental and decay stages in Zhangjiang River Estuary, China
	Zhou, Hai-Chao ; Zhou HC(周海超) ; Wei, Shu-Dong ; Zeng, Qi ; Zhang, Li-Hua ; Lin, Yi-Ming ; Lin YM(林益明) ; Tam, Nora Fung-yee（City Univ Hong Kong）
	2010-03
关键词	mangroves degradation nutrients energy leaves Zhangjiang River Estuary
英文摘要	Avicennia marina is a typical mangrove species in the subtropical coastlines of China. The main objective of this study was to assess nutrient and caloric dynamics in A. marina leaves at different developmental and decay stages. Decomposition studies using litter bags suggested that the time required for the loss of half of the initial dry weight (t(50)) was 19 days. The extracts of A. marina leaves contained non-tannin phenolics and tannin phenolics (hydrolysable tannin), but no condensed tannin. Non-tannin phenolics and tannin phenolics contents did not differ significantly from each other at various developmental stages, but decreased rapidly during leaf decomposition. Avicennia marina leaves had high N levels, and both N and P concentrations decreased significantly during senescence. During decomposition, N concentration of the leaf litter increased gradually but the phosphorus concentration showed a decrease in the first week, and both N and P remained the same towards the end of the experiment. The gross caloric value (GCV) of mature leaves was significantly higher than those of young and senescent leaves, while ash-free caloric value (AFCV) did not change significantly during leaf development and senescence. During leaf decomposition, both GCV and AFCV increased gradually and remained the same at late stages. In subtropical Zhangjiang River Estuary, high N levels and lack of condensed tannins in A. marina leaves were responsible for the fast rate of decay. Non-tannin phenolics and tannin phenolics had no great effect on rate of decay. Nitrogen resorption during leaf senescence, and high litter decomposition followed by nitrogen immobilization are the important nutrient conservation strategy for A. marina. (C) 2009 Elsevier Ltd. All rights reserved.; Program for New Century Excellent Talents in University [NCET-07-0725]; Program for Innovative Research Team in Science and Technology in Fujian Province University
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1016/j.ecss.2009.12.005]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	Zhou, Hai-Chao,Zhou HC,Wei, Shu-Dong,et al. Nutrient and caloric dynamics in Avicennia marina leaves at different developmental and decay stages in Zhangjiang River Estuary, China[J],2010.
APA	Zhou, Hai-Chao.,周海超.,Wei, Shu-Dong.,Zeng, Qi.,Zhang, Li-Hua.,...&Tam, Nora Fung-yee.(2010).Nutrient and caloric dynamics in Avicennia marina leaves at different developmental and decay stages in Zhangjiang River Estuary, China..
MLA	Zhou, Hai-Chao,et al."Nutrient and caloric dynamics in Avicennia marina leaves at different developmental and decay stages in Zhangjiang River Estuary, China".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。