干旱区生态环境知识资源中心(Arid): Evaluating the variability of ANPP in central Iranian arid and semi-arid rangelands using CASA model and its relationship with climatic factors

Arid

DOI	10.1007/s12303-018-0040-1
	Evaluating the variability of ANPP in central Iranian arid and semi-arid rangelands using CASA model and its relationship with climatic factors
	Saki, Marjan; Soltani, Saeid; Esfahani, Mostafa Tarkesh; Jafari, Reza
通讯作者	Saki, Marjan
来源期刊	GEOSCIENCES JOURNAL
ISSN	1226-4806
EISSN	1598-7477
出版年	2019
卷号	23 期号:3 页码:531-545
英文摘要	Aboveground Net Primary Production (ANPP) plays an important role in regulating ecological processes and carbon cycle in arid and semi-arid rangelands. Hence, this study aimed to investigate the spatio-temporal variability of rangeland ANPP in seven bioclimatic zones in Isfahan Province using the Carnegie-Ames-Stanford Approach (CASA) ecosystem model fitted with MODIS-NDVI and climatic data during 2000-2016. The model evaluation indicated a good agreement between the estimated and observed ANPP (R-2 = 0.917). In concomitant with the precipitation gradient, the mean annual ANPP increased from east towards west and southwest of the region from zero to 160 g C m(-2) yr(-1). The maximum and minimum ANPP values occurred in humid and cold as well as hyper-arid and warm zone, respectively. The annual temporal variability of ANPP was analyzed in response to climatic factors (precipitation and temperature), Temperature Vegetation Dryness Index (TVDI) and Standard Precipitation Index (SPI) drought indices. The drought was found as the most important factor affecting ANPP. The minimum and maximum ANPP values were observed in 2000 (23.23 g C m(-2) yr(-1)) and 2014 (41.73 g C m(-2) yr(-1)). The maximum ANPP occurred in May and June during which temperature, as an important factor in plant growth, reached its optimum and precipitation affected with a time lag. The annual rangeland ANPP was positively associated with precipitation and negatively with temperature.
英文关键词	Aboveground Net Primary Production climatic factors drought indices arid and semi-arid regions CASA model Isfahan Province
类型	Article
语种	英语
国家	Iran
收录类别	SCI-E
WOS记录号	WOS:000469221700012
WOS关键词	NET PRIMARY PRODUCTIVITY ; SPATIOTEMPORAL DISTRIBUTION ; TERRESTRIAL ECOSYSTEMS ; USE EFFICIENCY ; GRASSLAND ; PRECIPITATION ; VEGETATION ; DYNAMICS ; CHINA ; IMPACTS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216044
作者单位	Isfahan Univ Technol, Dept Nat Resources, Esfahan 8415683111, Iran
推荐引用方式 GB/T 7714	Saki, Marjan,Soltani, Saeid,Esfahani, Mostafa Tarkesh,et al. Evaluating the variability of ANPP in central Iranian arid and semi-arid rangelands using CASA model and its relationship with climatic factors[J],2019,23(3):531-545.
APA	Saki, Marjan,Soltani, Saeid,Esfahani, Mostafa Tarkesh,&Jafari, Reza.(2019).Evaluating the variability of ANPP in central Iranian arid and semi-arid rangelands using CASA model and its relationship with climatic factors.GEOSCIENCES JOURNAL,23(3),531-545.
MLA	Saki, Marjan,et al."Evaluating the variability of ANPP in central Iranian arid and semi-arid rangelands using CASA model and its relationship with climatic factors".GEOSCIENCES JOURNAL 23.3(2019):531-545.