Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/ldr.2418 |
Rain Use Efficiency, Primary Production and Rainfall Relationships in Desert Rangelands of Tunisia | |
Gamoun, Mouldi1,2 | |
通讯作者 | Gamoun, Mouldi |
来源期刊 | LAND DEGRADATION & DEVELOPMENT
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ISSN | 1085-3278 |
EISSN | 1099-145X |
出版年 | 2016 |
卷号 | 27期号:3页码:738-747 |
英文摘要 | Desert rangelands are characterised by low and highly variable rainfall regime, low forage production and high heterogeneity in the distribution of natural resources. This study was carried out in the desert rangelands of Tunisia to evaluate the response of different rangelands to annual rainfall in terms of aboveground net primary production (ANPP) and rain use efficiency over a 10-year period (2003-2012). In general, ANPP values were relatively low (123kgDMha(-1)y(-1)) but would tend to increase with increasing annual rainfall for all rangeland types. The highest value of ANPP was observed from Stipagrostis pungens and Hammada shmittiana communities (sandy-soil) during the wet year 2011. In contrast, rain use efficiency tends to decline with the highest annual rainfall and varies among rangeland types and with an average of 19kgDMha(-1)mm(-1)y(-1). Rain use efficiency tended to be higher during dry years and lower during wet years and tended to be higher on S. pungens and H. shmittiana (sandy-soils) and lower on Helianthemum kahiricum (loamy soils). Therefore, understanding how rainfall affects productivity in rangelands is critical for predicting the impact of land degradation on the functioning of these ecosystems. It can be used to explain production decline associated with desertification as well as to assess rangeland conditions. Copyright (c) 2015 John Wiley & Sons, Ltd. |
英文关键词 | plant communities ANPP degradation RUE rangelands Tunisia |
类型 | Article |
语种 | 英语 |
国家 | Tunisia |
收录类别 | SCI-E |
WOS记录号 | WOS:000373949600026 |
WOS关键词 | PRECIPITATION-USE EFFICIENCY ; NET PRIMARY PRODUCTIVITY ; WATER-USE-EFFICIENCY ; SEMIARID GRASSLAND ; CLIMATE-CHANGE ; UNITED-STATES ; ARID LANDS ; TEMPERATE GRASSLANDS ; NITROGEN LIMITATION ; TEMPORAL VARIATION |
WOS类目 | Environmental Sciences ; Soil Science |
WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/194938 |
作者单位 | 1.Inst Reg Arides, Range Ecol Lab, Medenine 4119, Tunisia; 2.El Manar Univ, Dept Biol, Fac Sci, Tunis 1060, Tunisia |
推荐引用方式 GB/T 7714 | Gamoun, Mouldi. Rain Use Efficiency, Primary Production and Rainfall Relationships in Desert Rangelands of Tunisia[J],2016,27(3):738-747. |
APA | Gamoun, Mouldi.(2016).Rain Use Efficiency, Primary Production and Rainfall Relationships in Desert Rangelands of Tunisia.LAND DEGRADATION & DEVELOPMENT,27(3),738-747. |
MLA | Gamoun, Mouldi."Rain Use Efficiency, Primary Production and Rainfall Relationships in Desert Rangelands of Tunisia".LAND DEGRADATION & DEVELOPMENT 27.3(2016):738-747. |
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