Climate change versus land-use change-What affects the ecosystem services more in the forest-steppe ecotone?
Climate change versus land-use change-What affects the ecosystem services more in the forest-steppe ecotone?
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DOI：
10.1016/j.scitotenv.2020.143525
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发表时间：
2021-01-06
影响因子：
9.8
通讯作者：
Dai, Luwei
中科院分区：
文献类型：
--
作者：
Cui, Fengqi;Wang, Bojie;Dai, Luwei
生态系统服务功能在自然生态系统和社会经济发展的平衡中发挥着重要作用，但由于人类活动和气候变化的影响，生态系统服务功能正在遭受退化。然而，ESS对土地利用/覆被变化(LUCCs)和气候因子的响应机制尚不清楚，特别是在对气候变化和人类活动高度敏感的森林草原交错带。基于遥感数据和现场气象数据，通过两个简单的对比实验，综合模拟和比较了LUCC的3种类型、土地利用变化率和气候变化引起的4个关键ESS变化。结果表明：退耕还林提高了土壤平均持水量、固碳量和产水量，但减少了固沙作用。农田扩张对产水量和固沙有积极影响，但导致土壤保持和固碳能力下降。城市化很可能增加了产水量，但减少了土壤保持、固碳和固沙。同一土地利用类型的不同变化量对生态系统的影响程度不同。由于生态过程的不同，不同景观的ESS变化对气候变化的响应也不同。用温度、降水、辐射和风速可以很好地解释产水量。气候变化对产水量和固碳量的影响大于土地利用/覆盖的变化，但土地利用/覆被变化对固沙和土壤保持的影响更大。在制定土地利用政策时，应考虑三类土地利用变化和气候变化对生态系统服务的影响。本文为森林草原交错带实现生态系统可持续经营和制定土地利用策略提供了决策依据。(C)2020爱思唯尔B.V.保留所有权利。
The Ecosystem services (ESs), which play an important role in the balance of the natural ecosystem and social-economic development, are suffering from degradation caused by human activities and climate change. However, themanner inwhich the ESs respond to the land use/cover changes (LUCCs) and the climatic factors respectively remain elusive, especially in the forest-steppe ecotone, which is highly sensitive to climate change and anthroponotic activities. Based on the remote sensing data and in situ meteorological data, we comprehensively modeled and compared 4 key ESs changes caused by 3 LUCC types, land-use change fraction, and climate changes through two simple comparative experiments. Our results showed that: theGrain for theGreen Project improved the mean soil conservation, carbon sequestration, and water yield but reduced the sand fixation. The cropland expansion had a positive influence on the water yield and sand fixation, but it induced a decline in soil conservation and carbon sequestration. The urbanization very likely increased the water yield and decreased soil conservation, carbon sequestration, and sand fixation. The unequal change fractions of the same land-use conversion may affect the ESs differently. The ESs changes have different responses to climate change in different landscapes due to the ecological process. The water yield could be well explained by the temperature, precipitation, radiation, and wind speed. Climate change had a stronger effect on the water yield and carbon sequestration than the land use/cover changes but sand fixation and soil conservation were more likely to be affected by LUCCs. The impact of three types of land-use changes and climate change on the ecosystem services should be considered when formulating land-use policies. This paper might aid the decision-makers in achieving ESs sustainable management and develop land-use strategies in the forest-steppe ecotone. (C) 2020 Elsevier B.V. All rights reserved.