干旱区生态环境知识资源中心(Arid): Long-term NDVI and recent vegetation cover profiles of major offshore island nesting sites of sea turtles in Saudi waters of the northern Arabian Gulf

Arid

DOI	10.1016/j.ecolind.2020.106612
	Long-term NDVI and recent vegetation cover profiles of major offshore island nesting sites of sea turtles in Saudi waters of the northern Arabian Gulf
	Maneja, Rommel H.; Miller, Jeffrey D.; Li, Wenzhao; El-Askary, Hesham; Flandez, Ace Vincent B.; Dagoy, Joshua J.; Alcaria, Joselito Francis A.; Basali, Abdullajid U.; Al-Abdulkader, Khaled A.; Loughland, Ronald A.; Qurban, Mohamed A.
通讯作者	El-Askary, H
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2020
卷号	117
英文摘要	Vegetation is an important ecological component of offshore islands in the Arabian Gulf (AG), which maintains long-term resilience of these islands. This is achieved by influencing sediment retention and moisture acquisition via condensation during periods of high humidity and by providing a variety of microhabitats for island fauna. The resilience of offshore islands' ecosystems in the Saudi waters is important because they host the largest number of nesting hawksbill and green turtles in the AG. This study defines the characteristics and the long-term trends in vegetation cover of the offshore islands used by sea turtles as nesting grounds in the northern AG. To establish a ground-validated baseline for vegetation profiles, a 50 m x 50 m grid system is developed on Karan and Jana islands (Is.) with photo-quadrats taken at each grid intersection. The 1,317 and 444 photo-quadrats, for Karan and Jana Is., respectively, were analyzed for maximum plant height and percent cover of living (green) plants, dead plants, and bare sand. Landsat 7 and 8 satellite top-of-atmosphere reflectance images were used to calculate the Normalized Difference Vegetation Index (NDVI) from 1999 through 2018 to analyze the long-term vegetation profiles of the islands. Monthly rainfall data from five meteorological stations along the Eastern Province of Saudi Arabia and Oceanic Nino Index (ONI) are presented to provide a context of the long-term NDVI time series variability. The ground-validated vegetation profiles provided baseline data during the onset of summer in 2017 and revealed differences in maximum plant height and the extent of living, dead vegetation and sand cover on Jana Is. (28.3 cm, 19.9%, 63.3%, and 16.8%) and Karan Is. (21.7 cm, 20.6%, 48.7%, and 30.7%), respectively. The NDVI data for both islands are grouped into three periods, namely: 2001-2007 -high winter, low summer; 2008-2013 - low winter, low summer; 2014-2018 - irregular high/low winter, low summer. The long-term trend showed a slightly decreasing NDVI when compared in the context of the high NDVI measured for the two islands during the early 2000 s, particularly during the winter time. An extended reduction in winter NDVI was recorded for six years from 2008 to 2013, which coincided with reduced rainfall in the region and prolonged La Nina. Five extreme dips in winter NDVI values coincided with strong (2000, 2008, and 2011) and moderate (2012 and 2018) La Nina events. Long-term vegetation profiles of the offshore islands seemed to be tightly coupled with long-term rainfall patterns.
英文关键词	Island vegetation NDVI Landsat Arabian Gulf La Nina Oceanic Nino Index Desertification Sea turtle nesting island
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000555554700006
WOS关键词	CLIMATE-CHANGE PROJECTIONS ; HAWKSBILL TURTLES ; TIME-SERIES ; MIDDLE-EAST ; PRECIPITATION ; VARIABILITY ; DESERTIFICATION ; RAINFALL ; REGION ; EVAPOTRANSPIRATION
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325387
作者单位	[Maneja, Rommel H.; Miller, Jeffrey D.; Flandez, Ace Vincent B.; Dagoy, Joshua J.; Alcaria, Joselito Francis A.; Basali, Abdullajid U.] King Fahd Univ Petr & Minerals KFUPM, Ctr Environm & Water, Res Inst, Dhahran 31261, Saudi Arabia; [Li, Wenzhao] Chapman Univ, Schmid Coll Sci & Technol, Computat & Data Sci Grad Program, Orange, CA 92866 USA; [El-Askary, Hesham] Chapman Univ, Ctr Excellence Earth Syst Modeling & Observat, Orange, CA 92866 USA; [El-Askary, Hesham] Chapman Univ, Schmid Coll Sci & Technol, 1 Univ Dr, Orange, CA 92866 USA; [El-Askary, Hesham] Alexandria Univ, Fac Sci, Dept Environm Sci, Alexandria 21522, Egypt; [Al-Abdulkader, Khaled A.; Loughland, Ronald A.] Saudi Aramco, Environm Protect Dept, Dhahran, Saudi Arabia; [Qurban, Mohamed A.] Minist Environm Water & Agr, Riyadh, Saudi Arabia
推荐引用方式 GB/T 7714	Maneja, Rommel H.,Miller, Jeffrey D.,Li, Wenzhao,et al. Long-term NDVI and recent vegetation cover profiles of major offshore island nesting sites of sea turtles in Saudi waters of the northern Arabian Gulf[J],2020,117.
APA	Maneja, Rommel H..,Miller, Jeffrey D..,Li, Wenzhao.,El-Askary, Hesham.,Flandez, Ace Vincent B..,...&Qurban, Mohamed A..(2020).Long-term NDVI and recent vegetation cover profiles of major offshore island nesting sites of sea turtles in Saudi waters of the northern Arabian Gulf.ECOLOGICAL INDICATORS,117.
MLA	Maneja, Rommel H.,et al."Long-term NDVI and recent vegetation cover profiles of major offshore island nesting sites of sea turtles in Saudi waters of the northern Arabian Gulf".ECOLOGICAL INDICATORS 117(2020).