干旱区生态环境知识资源中心(Arid): Large heterogeneity of water and nutrient supply derived from runoff of nearby rock outcrops in karst ecosystems in SW China

Arid

DOI	10.1016/j.catena.2018.08.020
	Large heterogeneity of water and nutrient supply derived from runoff of nearby rock outcrops in karst ecosystems in SW China
	Shen, Youxin 1; Wang, Dianjie 2; Chen, Qiaoqiao 3; Tang, Yingyin 4; Chen, Fajun 5
通讯作者	Shen, Youxin
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	172 页码:125-131
英文摘要	Rock outcrops are frequently visible in terrestrial landscapes, typically in karst. However, there has been insufficient research conducted on their effects on the formation of soil water and nutrients heterogeneity in nearby soil patches. In: 1) a rock desertification ecosystem, 2) an anthropogenic forest ecosystem, and 3) a secondary forest ecosystem in Shilin, Southwest China, rock occupancy ratio was measured, water received by and subsequently funneled off by rock outcrops was quantified, and their concentrations of the total organic carbon, nitrogen, phosphorus, and potassium were determined. Receiving rate R-r of those elements of the remaining soil patches in various 2 m x 2 m soil + rock outcrop samples were calculated, and r(200) at which R-r of the remaining soil patch was twice that without rock emergence was calculated to evaluate the heterogeneity difference among different elements in different ecosystems. There were 1.43-5.44 folds differences between R-r under the highest rock ratio (79.4%) sample and the rate of non-rock emergence sample for water, organic carbon, nitrogen, phosphorus, and potassium in the three ecosystems respectively, indicating a large supply heterogeneity for those elements within an ecosystem and between ecosystems. The r(200) were between 47% (water, at rock desertification ecosystem) to 90% (potassium at rock desertification ecosystem, depending on the receiving rate and funneling rate of the rock for different element in different ecosystem. In conclusion, large supply heterogeneity has derived from high variation of rock runoff determined by rock emergency ratio, the rate of receiving and the rate of funneling off by the rock. Our study provided new evidence to trace soil and water heterogeneity of microhabitats in rocky ecosystems. Additionally, rock outcrop is also an important factor in evaluating hydrological and related nutrient characteristics in rocky ecosystems.
英文关键词	Rock funneling Water Soil nutrients Deposition Microhabitat, vegetation difference
类型	Article
语种	英语
国家	Peoples R China ; Australia
收录类别	SCI-E
WOS记录号	WOS:000449136800012
WOS关键词	FOREST ; DEPOSITION ; NITROGEN ; GROWTH ; RAIN
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214800
作者单位	1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Menglun 666303, Yunnan, Peoples R China; 2.Griffith Univ, Nathan, Qld 4111, Australia; 3.Guangxi Univ Nationalities, Nanning 530006, Peoples R China; 4.Bazhong Environm Monitoring Ctr, Bazhong City 636600, Sichuan, Peoples R China; 5.Neijiang Normal Univ, Neijiang 641100, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Shen, Youxin,Wang, Dianjie,Chen, Qiaoqiao,et al. Large heterogeneity of water and nutrient supply derived from runoff of nearby rock outcrops in karst ecosystems in SW China[J],2019,172:125-131.
APA	Shen, Youxin,Wang, Dianjie,Chen, Qiaoqiao,Tang, Yingyin,&Chen, Fajun.(2019).Large heterogeneity of water and nutrient supply derived from runoff of nearby rock outcrops in karst ecosystems in SW China.CATENA,172,125-131.
MLA	Shen, Youxin,et al."Large heterogeneity of water and nutrient supply derived from runoff of nearby rock outcrops in karst ecosystems in SW China".CATENA 172(2019):125-131.