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DOI	10.1088/1748-9326/ab04d2
	Impacts of land cover and land use change on long-term trend of land surface phenology: A case study in agricultural ecosystems
	Zhang X.; Liu L.; Henebry G.M.
发表日期	2019
ISSN	17489318
卷号	14 期号:4
英文摘要	Vegetation phenological trends during last few decades have been frequently reported and these trends are commonly assumed to result from climate change. With the widespread influence of both human activities and natural processes, however, land cover and land use change (LCLUC) has dominated across various ecosystems in more than one-third of world's land surface. LCLUC could lead to changes in vegetation types and species composition at local to regional scales. Thus, we hypothesize that LCLUC can significantly influence phenological trends at an ecosystem scale. Here we tested this hypothesis in agricultural ecosystems composed of various crop types spanning the Midwest of the United States by analyzing satellite-observed land surface phenology from 1982 to 2014. Greenup onset dates in croplands occurred later at rates ranging from 0.18 to 0.67 d yr-1 at the state scale. This trend was due to significant areal increases in corn (maize) and soybean that have later emergence coupled with areal decreases in wheat and oats that have earlier emergence, despite a trend of warmer spring temperatures that aid earlier crop emergence. Overall, considering the long-term directional change in greenup onset dates across these croplands, two-thirds was attributable to LCLUC and one-third to climatic variation. This finding indicates that extensive LCLUC can be the primary driver of satellite-observed phenological trends, especially in intensively managed agricultural landscapes. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	agriculatural ecosystems; climate change; land cover and land use change; land surface phenology; long-term trend
语种	英语
scopus关键词	Crops; Ecosystems; Forestry; Land use; Surface measurement; Vegetation; Agricultural ecosystems; Agricultural landscapes; Directional changes; Land surface phenology; Land-use change; Long-term trend; Species composition; Spring temperatures; Climate change; agricultural ecosystem; agricultural land; climate change; human activity; land cover; land use change; long-term change; maize; phenology; soybean; United States; Avena; Glycine max; Triticum aestivum; Zea mays
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154621
作者单位	Geospatial Sciences Center of Excellence, South Dakota State University, Brookings, SD 57007, United States; Department of Geography, South Dakota State University, Brookings, SD 57007, United States; Center for Global Change and Earth Observations (CGCEO), Michigan State University, East Lansing, MI 48823, United States; Department of Geography, Environment and Spatial Sciences, Michigan State University, East Lansing, MI 48824, United States
推荐引用方式 GB/T 7714	Zhang X.,Liu L.,Henebry G.M.. Impacts of land cover and land use change on long-term trend of land surface phenology: A case study in agricultural ecosystems[J],2019,14(4).
APA	Zhang X.,Liu L.,&Henebry G.M..(2019).Impacts of land cover and land use change on long-term trend of land surface phenology: A case study in agricultural ecosystems.Environmental Research Letters,14(4).
MLA	Zhang X.,et al."Impacts of land cover and land use change on long-term trend of land surface phenology: A case study in agricultural ecosystems".Environmental Research Letters 14.4(2019).