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核心期刊论文目录 |
鼎湖山三种主要林型水文学过程中总有机碳浓度对比 |
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| 出 版 社：生态学报 |
| 发表时间：2005 |
| 台 站：
鼎湖山森林生态系统定位研究站
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| 作 者：罗艳 周国逸 张德强 官丽莉 欧阳学军 褚国伟 |
| 点 击 率：5134 |
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| 关 键 字：总有机碳 浓度 鼎湖山 演替 森林水文学过程 |
| 摘 要：为了解碳在森林内部以及群落演替过程中的转运动态,对鼎湖山3种主要林型(马尾松林,马尾松针阔混交林和季风常绿阔叶林)森林水文学过程中总有机碳(total organic carbon,TOC)浓度进行了一个雨季的观测,结果发现:(1)穿透水中TOC浓度相对大气降水中TOC浓度的增量为:季风常绿阔叶林>马尾松针阔混交林1>马尾松针阔混交林2 >马尾松林;(2 )树干茎流平均TOC浓度为:马尾松林>马尾松针阔混交林2 >马尾松针阔混交林1>季风常绿阔叶林;(3)各林内土壤水TOC浓度差异不明显,但根系层(2 5～30 cm)土壤水TOC浓度均大于母质层(5 0～80 cm) TOC浓度;(4 )马尾松林的溪水具有较高的TOC浓度和较大的月际波动;(5 )总体上,整个森林水文学过程中,3种林型TOC浓度变化趋势相似,均为:树干茎流>穿透水>根系层土壤水>母质层土壤水>溪水,但变化幅度不同:马尾松林的变化幅度最大,季风林的最小,而两个混交林居中。这表明,(1)森林演替过程中,林冠层结构、树种构成等的改变可能引起森林水文学过程中TOC浓度的变化;(2 )森林水文学过程转运的碳主要储存在森林内部;(3)成熟森林的抗干扰能力高于先锋群落 |
| 关 键 字(英文)：TOC concentration Dinghushan succession forest hydrological processes |
| 摘 要(英文)：There is significant importance of total organic carbon (TOC) transport during the hydrological processes in forest ecosystem, for which plays an important role at intra-ecosystem carbon dynamics and carbon dynamics during successions. It is probably helpful in finding “missing carbon sink”, too. This research was conducted in Dinghushan Biosphere Reserve (DHSBR), which is located in lower subtropical China. There are three main forest types including Pinus massoniana forest (PMF), pine and broadleaf mixed forest (PBMF), monsoon evergreen broadleaf forest (MEBF) in Dinghushan, which represent three stages of a series of forest succession. Water samples from 6 hydrological processes, ie, precipitation, throughfall, stemflow, soil water of As-horizon(25～30cm in depth, SW1), soil water of C-horizon (50～80cm in depth, SW2) and stream flow of PMF, PBMF1, PBMF2年nd MEBF were collected on a rain event bases from May 2003 to September 2003. TOC concentrations were determined by TOC analyzer (TOC-V, Shimadzu, Japan) in o rder to ravel the
changes of TOC concent rat ion in a single fo rest and during successions. The results show ed (1) the relat ive increment of TOC
concent rat ion in th roughfall versus that in p recip itat ion happened in the th ree main fo rest types w as exp ressed asM EBF >
PBM F 1 > PBM F 2 > PM F; (2) TOC concent rat ion of stemflow w as exp ressed as PM F > PBM F 2 > PBM F 1 > M EBF;
(3) TOC concent rat ion of SW 1 is much h igher than that of SW 2; (4) the st ream w ater in the P inus m assoniana fo rest has the h ighest TOC concent rat ion; (5) There w ere sim ilar tendency of TOC concent rat ions during the hydro logical p rocesses in th ree
main fo rest types, w h ich w ere stemflow > th roughfall > SW 1> SW 2 > st ream w ater. But variat ion of TOC concent rat ions
during the hydro logical p rocesses inM EBF w as the low est in the th ree fo rest typesw h ile that in PM F w as the h ighest. A ll of
the results indicated that (1) changes of canopy st ructure and t ree species during successions can affect the concent rat ion of
TOC during the hydro logical p rocesses; (2) TOC t ranspo rted during hydro logical p rocesses w as mo st ly sto red in the fo rest
eco system; (3) the resistance of mature fo rest w as h igher than that of p ioneer community. |
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 鼎湖山三种主要林型水文学过程中总有机碳浓度对比.PDF |
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