Rangeland water requirement satisfaction index under rainfall variability and predicting future rainfall scenarios: implication for availability of feed resources

作     者：Hassen M.Ahmed Zewdu K.Tessema Adugna Tolera Diriba Korecha 

作者机构：School of Animal and Range SciencesCollege of Agriculture and Environmental SciencesPO Box 138Dire DawaEthiopia School of Animal and Range SciencesHawassa UniversityPO Box 222HawassaEthiopia Famine Early Warning Systems NetworkPO Box 1090Addis AbabaEthiopia School of Animal and Range SciencesCollege of Agriculture and Environmental SciencesHaramaya UniversityPO Box 1632Dire DawaEthiopia 

出 版 物：《Ecological Processes》 (生态过程（英文）)

年 卷 期：2017年第6卷第1期

页      面：264-272页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0905[农学-畜牧学] 09[农学] 0815[工学-水利工程] 0713[理学-生态学] 

基　　金：Agro-pastoral Research and Capacity Building Directorate Somali Region Pastoral and Agro-pastoral Research Institute Haramaya University Deutsche Gesellschaft für Internationale Zusammenarbeit, GIZ 

主　　题：LEAP software Pastoralist Rangeland water requirement Trend analysis 

摘      要：Introduction:Rangeland ecosystems provide multiple ecosystem services,including feed resources for wild and domestic herbivores in semi-arid ***,under the ever increasing environmental changes,the impact of rainfall variability on the productivity and vegetation dynamics of rangelands are the great challenges that pastoral community are facing *** a result,the potentials of most rangelands in semi-arid ecosystems affect the ***,we studied the interconnections between the long-term rainfall variation and the rangeland Water Requirement and Satisfaction Index(WRSI)in Mieso,Jigjiga,and Shinile districts under pastoral conditions of ***:The base period rainfall data(1984–2015)was obtained from the National Meteorological Agency of Ethiopia,whereas the future rainfall trend was predicted using MarkSim software(Representative Concentration Pathways 4.5 GHG concentration trajectory).Mann-Kendall’s statistical tests,coefficient of variation,LEAP software(version 2.61),and Minitab Software(version 15)were used to assess the relationship between rangeland WRSI and long-term rainfall ***:The result indicated that mean annual rainfall anomaly had strong positive correlation with rangeland WRSI in Mieso(P0.05),Jigjiga(P0.001),and Shinile(P0.001)pastoral ***,short and long rainy seasons had positive association(P0.001)with rangeland WRSI,especially in Jigjiga and Shinile pastoral *** base period rainfall as well as the predicted annual rainfall showed variability in amount and distribution in all studied districts in pastoral areas of ***:The mean annual rainfall anomaly is correlated with the rangeland ***,the future rainfall trend analysis indicated that variability of rainfall would be expected in between the years 2020–2049,2040–2069,and 2070–***,the future rainfall variability would limit future rangeland WRSI under pastoral conditions of Ethiopia.