气候变化领域集成服务门户(CCPortal): Scaling effects on landscape metrics in alpine meadow on the central Qinghai-Tibetan Plateau

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DOI	10.1016/j.gecco.2021.e01742
	Scaling effects on landscape metrics in alpine meadow on the central Qinghai-Tibetan Plateau
	Zhang, Wei; Zhang, Jinglin
通讯作者	Zhang, JL (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, 320 Donggang West Rd, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	2351-9894
卷号	29
英文摘要	Small-scale patchiness is common in alpine meadow on the Qinghai-Tibetan Plateau (QTP) and significantly affects ecological processes. The unmanned aerial vehicle (UAV) provides an effective way to monitor the small-scale patchiness at different spatial scales. However, there is a lack of studies concerning the scaling effects on landscape metrics derived from UAV data, which are essential for observation scales and landscape metrics selection. Here, we first analyzed the responses of landscape metrics and their relationships with controlling environmental factors to the changing of spatial scales. We then discussed the ideal observation scales and landscape metrics for alpine meadow on the QTP. The results showed that: 1) contiguity, edge density, shape, fractal dimension, patch density (PD), perimeter-area ratio (PAR) and connectance (CONNECT) metrics exhibited a predictable (linear or power law) response to the changes of spatial scales; 2) soil water content and temperature (SWC and ST), soil organic carbon (SOC) and air temperature (TEMP) were significantly correlated with percentage of landscape index (PL), largest patch index (LPI), aggregation (AI), average area of patches (PA), CONNECT, PAR, and PD (P < 0.05); 3) the correlations between SWC, ST, SOC, TEMP and most landscape metrics presented as an approximate parabola and peaked at the flight heights of 40-60 m. Our findings indicated that alpine meadow landscape on the QTP could be accurately quantified using UAV photogrammetry with PL, LPI, AI, CONNECT, PAR and PD metrics, and the optimal observation extents are 70 m x 52.5 m similar to 105 m x 78.75 m, with the grain sizes ranged from 1.75 cm to 2.19 cm.
关键词	THEMATIC RESOLUTION PATTERN METRICS CHANGING SCALE SOIL-MOISTURE INDEXES FRAGMENTATION SENSITIVITY GRASSLAND BASIN PATCHINESS
英文关键词	Alpine meadow; Scaling effect; Landscape metrics; Unmanned aerial vehicle; FragMAP
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology
WOS记录号	WOS:000693217100001
来源期刊	GLOBAL ECOLOGY AND CONSERVATION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254089
作者单位	[Zhang, Wei] Chuzhou Univ, Sch Geog Informat & Tourism, 1 Huifeng West Rd, Chuzhou 239000, Peoples R China; [Zhang, Jinglin] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, 320 Donggang West Rd, Lanzhou 730000, Peoples R China; [Zhang, Jinglin] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Wei,Zhang, Jinglin. Scaling effects on landscape metrics in alpine meadow on the central Qinghai-Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,29.
APA	Zhang, Wei,&Zhang, Jinglin.(2021).Scaling effects on landscape metrics in alpine meadow on the central Qinghai-Tibetan Plateau.GLOBAL ECOLOGY AND CONSERVATION,29.
MLA	Zhang, Wei,et al."Scaling effects on landscape metrics in alpine meadow on the central Qinghai-Tibetan Plateau".GLOBAL ECOLOGY AND CONSERVATION 29(2021).