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Dry and wet miombo woodlands of south-central Africa respond differently to climate change.
Environmental Monitoring and Assessment ( IF 2.9 ) Pub Date : 2020-05-16 , DOI: 10.1007/s10661-020-08342-x
Percy Jinga 1 , Jason Palagi 2
Affiliation  

It is important to understand how species distributions will shift under climate change. While much focus has been on species tracking temperature changes in the northern hemisphere, changing precipitation patterns in tropical regions have received less attention. The aim of the study was to estimate the current distribution of wet and dry miombo woodlands of sub-Saharan Africa and to predict their distributions under different climate change scenarios. A maximum entropy method (Maxent) was used to estimate the distributions and for projections. Occurrence records of dominant tree species in each woodland were used for modeling, together with altitude, soil characteristics, and climate variables as the environmental variables. Modeling was done under all four representative concentration pathways (RCPs) and three general circulation models. Three dominant tree species were used in models of dry miombo while seven were used for wet miombo. Models estimated dry miombo to cover almost the entire known distribution of miombo woodlands while wet miombo were estimated to predominate in parts of Angola, southern Democratic Republic of Congo, Malawi, Tanzania, Zambia, and Zimbabwe. Future climate scenarios predict a drier climate in sub-Saharan Africa, and as a result, the range of dry miombo will expand. Dry miombo were predicted to expand by up to 17.3% in 2050 and 22.7% in 2070. In contrast, wet miombo were predicted to contract by up to − 28.6% in 2050 and − 41.6% in 2070. A warming climate is conducive for the proliferation of dry miombo tree species but unfavorable for wet miombo tree species.

中文翻译:

非洲中南部的干燥和湿润的Miombo林地对气候变化的反应不同。

重要的是要了解气候变化下物种分布将如何变化。尽管人们一直非常关注跟踪北半球温度变化的物种,但热带地区降水模式的变化却很少受到关注。这项研究的目的是估计撒哈拉以南非洲湿润和干燥的Miombo林地的当前分布,并预测在不同气候变化情景下的分布。使用最大熵方法(Maxent)估计分布并进行投影。使用每个林地中优势树种的发生记录以及海拔,土壤特征和气候变量作为环境变量进行建模。在所有四个代表性浓度途径(RCP)和三个常规循环模型下进行了建模。在干miombo模型中使用了3种优势树种,而在湿miombo模型中使用了7种树种。模型估计干miombo覆盖了几乎所有已知的miombo林地,而湿miombo估计在安哥拉,刚果民主共和国南部,马拉维,坦桑尼亚,赞比亚和津巴布韦的部分地区占主导地位。未来的气候情景预测,撒哈拉以南非洲的气候将更加干燥,结果,干燥的Miombo范围将会扩大。干燥的miombo预计在2050年将增长17.3%,在2070年将增长22.7%。相比之下,预测湿的miombo在2050年将收缩至− 28.6%,在2070年将收缩至− 41.6%。气候变暖有利于干燥的Miombo树种的繁殖,但不利于湿的Miombo树种。模型估计干miombo覆盖了几乎所有已知的miombo林地,而湿miombo估计在安哥拉,刚果民主共和国南部,马拉维,坦桑尼亚,赞比亚和津巴布韦的部分地区占主导地位。未来的气候情景预测,撒哈拉以南非洲的气候将更加干燥,结果,干燥的Miombo范围将会扩大。干燥的miombo预计在2050年将增长17.3%,在2070年将增长22.7%。相比之下,预测湿的miombo在2050年将收缩至− 28.6%,在2070年将收缩至− 41.6%。气候变暖有利于干燥的Miombo树种的繁殖,但不利于湿的Miombo树种。模型估计干miombo覆盖了几乎所有已知的miombo林地,而湿miombo估计在安哥拉,刚果民主共和国南部,马拉维,坦桑尼亚,赞比亚和津巴布韦的部分地区占主导地位。未来的气候情景预测,撒哈拉以南非洲的气候将更加干燥,结果,干燥的Miombo范围将会扩大。干燥的miombo预计在2050年将增长17.3%,在2070年将增长22.7%。相比之下,潮湿的miombo预计在2050年将收缩−28.6%,在2070年将收缩−41.6%。气候变暖有利于干燥的Miombo树种的繁殖,但不利于湿的Miombo树种。刚果民主共和国南部,马拉维,坦桑尼亚,赞比亚和津巴布韦。未来的气候情景预测,撒哈拉以南非洲的气候将更加干燥,结果,干燥的Miombo范围将会扩大。干燥的miombo预计在2050年将增长17.3%,在2070年将增长22.7%。相比之下,预测湿的miombo在2050年将收缩至− 28.6%,在2070年将收缩至− 41.6%。气候变暖有利于干燥的Miombo树种的繁殖,但不利于湿的Miombo树种。刚果民主共和国南部,马拉维,坦桑尼亚,赞比亚和津巴布韦。未来的气候情景预测,撒哈拉以南非洲的气候将更加干燥,结果,干燥的Miombo范围将会扩大。干燥的miombo预计在2050年将增长17.3%,在2070年将增长22.7%。相比之下,预测湿的miombo在2050年将收缩至− 28.6%,在2070年将收缩至− 41.6%。气候变暖有利于干燥的Miombo树种的繁殖,但不利于湿的Miombo树种。
更新日期:2020-05-16
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