Advanced   Register
XTBG OpenIR  > 景观生态研究组  > 期刊论文

title: Land use and topography as predictors of nitrogen levels in tropical catchments in Xishuangbanna, SW China
author: Li, Hongmei;  Ma, Youxin;  Liu, Wenjie
Issued Date: 2016
Abstract: The conversion of vast tropical forests to cash crops represents a widespread land-use change in tropical regions, and has consequences for soil and water biogeo-chemical cycles. We examined how the conversion of tropical forest to rubber plantations in Xishuangbanna, southwest China, influenced the nitrogen concentrations in stream water. Water samples were collected between 2008 and 2010 at 35 sites to search for spatial and temporal variations in nitrogen concentrations and for their relationships with environment variables. Streams associated with rubber plantations ("rubber streams'') had significantly higher total N (TN) and total dissolved N (TDN) concentrations than forest streams during all seasons. TN, TDN and nitrate concentrations were observed to be significantly higher in streams associated with mixed land use than in forest streams only in the middle rainy season. The highest TN, TDN and nitrate concentrations were observed in rubber streams, and the lowest were observed in forest streams, indicating that land-use change had a significant effect on N concentrations. Statistically significant seasonal differences in TN, TDN and nitrate concentrations, with the greatest values in the middle rainy season, were observed in rubber and mixed streams, but not in forest streams. Canonical correspondence analysis identified the proportions of rubber plantation and tropical forest land, as well as slope gradient, as primary predictors of nitrogen concentration. Our results indicate that controlling rubber plantation expansion on steep slopes and avoiding single or large areas of rubber plantation within a catchment can mitigate nutrient loss.
Source: ENVIRONMENTAL EARTH SCIENCES
Appears in Collections:景观生态研究组_期刊论文

Files in This Item:

File SizeFormat
Land use and topography as predictors of nitrogen levels in tropical catchments in Xishuangbanna, SW China.pdf1654KbAdobe PDFView  Download


全文许可: Creative Commons 署名-非商业性使用-相同方式共享 3.0

Recommended Citation:
Li, Hongmei,Ma, Youxin,Liu, Wenjie. Land Use And Topography As Predictors Of Nitrogen Levels In Tropical Catchments In Xishuangbanna, Sw China[J]. Environmental Earth Sciences,2016,75(6).

SCI Citaion Data:
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Li, Hongmei]'s Articles
 [Ma, Youxin]'s Articles
 [Liu, Wenjie]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Li, Hongmei]‘s Articles
 [Ma, Youxin]‘s Articles
 [Liu, Wenjie]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace