Changes in climate suitability for oil-tea (C. oleifera Abel) production in China under historical and future climate conditions

气候变化 环境科学 中国 大气环流模式 气候学 自然地理学 地理 生态学 地质学 生物 考古
作者
Dingrong Wu,Peijuan Wang,Zhigguo Huo,Xueyong Yuan,Jiang HuiFei,Jianying Yang,Junxian Tang,Yuping Ma
出处
期刊:Agricultural and Forest Meteorology [Elsevier BV]
卷期号:316: 108843-108843 被引量:8
标识
DOI:10.1016/j.agrformet.2022.108843
摘要

Defining climate suitability zones accurately can provide supporting information for locating regions for crops with a long period of return on investment such as oil-tea (C. oleifera). The objective of this study was to evaluate changes in suitability for a typical oil-tea species (Abel) under climate change conditions in China. Based on correlation analysis, annual mean temperature, mean temperature in July, annual rainfall, and annual sunshine hours were identified as the factors impacting production suitability. A modified bioclimatic method was verified using extensively collected crop occurrence data. Changes in climate suitability under two different historical periods (1961–1990, 1991–2020) and under two future climate change periods (2021–2050, 2051–2100) using 28 General Circulation Models (GCMs) under Representative Concentration Pathway (RCP) 4.5 and 8.5 emission scenarios were then investigated. Results showed that: (1) The modified method well described the main climatic features of the actual production regions; 96.3% of the dominant production regions and 92.4% of the main production regions were located in the regions classified as most suitable and suitable; (2) Historical climate change has caused the northern and southern production boundaries to move northward by 130 and 70 km, respectively, and the east-central part of the study region has degraded to the suitable classification; (3) Under RCP 4.5, the regional pattern of suitability did not change much, while under RCP 8.5, the area of the most suitable region was reduced by up to 66%; (4) Suitability varied greatly between different GCMs, especially under RCP 8.5. Our results showed that historical climate change had negative impacts in some of the most suitable regions, and that future climate change will have negative impacts on more regions. To maintain future healthy development of production, significant efforts should be devoted to breeding heat and drought-resistant varieties and to improving management practices.
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