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Potential biodiversity change in Central Asian grasslands: scenarios for the impact of climate and land-use change
Regional Environmental Change ( IF 3.4 ) Pub Date : 2020-03-18 , DOI: 10.1007/s10113-020-01619-4
Sarahi Nunez , Rob Alkemade , Kasper Kok , Rik Leemans

Central Asian grasslands are extensively used for pastoral livestock grazing. This traditional land use is nowadays characterized by intensifying grasslands into more productive pastures. This change affects biodiversity and diminishes grasslands’ ecological role. Biodiversity impacts are probably also exacerbated by climate change. These changes in biodiversity are poorly studied in Central Asia. Here, we estimated potential biodiversity changes in the Central Asian grasslands using the latest shared socio-economic pathways and the representative concentration pathways (i.e., SSP-RCP scenario framework). We selected scenarios with contrasting socio-economic and climate conditions (i.e., SSP1-RCP4.5, SSP3-RCP8.5, SSP4-RCP4.5, and SSP5-RCP8.5) and further detailed the land-use scenarios for the region using stakeholders’ input. We indicated future biodiversity by the mean species abundance indicator. The contrasting scenario combinations showed that grasslands’ biodiversity will decline under each scenario. The strongest impact on biodiversity is expected in SSP5-RCP8.5, where half of the grasslands are likely to lose most of their local originally occurring species by 2100. The lowest impact is expected in SSP4-RCP4.5. Our study stresses the potential vulnerability of this region to increasing land-use intensity and climate change. These impact projections can help regional decision makers to develop and implement better biodiversity-conservation and sustainable management policies for these grasslands.

中文翻译:

中亚草原潜在的生物多样性变化:气候和土地利用变化的影响情景

中亚草原被广泛用于放牧牲畜。如今,这种传统的土地利用的特征是将草地集约化为生产力更高的牧场。这种变化会影响生物多样性并削弱草原的生态作用。气候变化也可能加剧生物多样性的影响。在中亚,对生物多样性的这些变化的研究很少。在这里,我们使用最新的共享社会经济途径和代表性的集中途径(即SSP-RCP情景框架)估算了中亚草原潜在的生物多样性变化。我们选择了具有不同社会经济和气候条件的方案(即SSP1-RCP4.5,SSP3-RCP8.5,SSP4-RCP4.5和SSP5-RCP8.5),并进一步详细说明了该地区的土地使用方案利用利益相关者的意见。我们通过平均物种丰富度指标表明了未来的生物多样性。不同的情景组合表明,每种情景下草原的生物多样性都会下降。预计对SSP5-RCP8.5的生物多样性影响最大,到2100年,一半的草原可能会丧失其大部分本地原始物种。对SSP4-RCP4.5的影响最小。我们的研究强调了该地区在增加土地利用强度和气候变化方面的潜在脆弱性。这些影响预测可以帮助区域决策者为这些草原制定和实施更好的生物多样性保护和可持续管理政策。预计对SSP5-RCP8.5的生物多样性影响最大,到2100年,一半的草原可能会丧失其大部分本地原始物种。对SSP4-RCP4.5的影响最小。我们的研究强调了该地区在增加土地利用强度和气候变化方面的潜在脆弱性。这些影响预测可以帮助区域决策者为这些草原制定和实施更好的生物多样性保护和可持续管理政策。预计对SSP5-RCP8.5的生物多样性影响最大,到2100年,一半的草原可能会丧失其大部分本地原始物种。对SSP4-RCP4.5的影响最小。我们的研究强调了该地区在增加土地利用强度和气候变化方面的潜在脆弱性。这些影响预测可以帮助区域决策者为这些草原制定和实施更好的生物多样性保护和可持续管理政策。
更新日期:2020-03-18
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