玉溪市生态系统服务功能重要性评价及机理

Evaluation and mechanism on the importance of ecosystem service functions in Yuxi City

以玉溪市为研究对象,结合其生态环境的实际情况及数据,对玉溪市生态系统服务功能重要性进行评价,并探究其形成重要性格局的内在机理。结果表明,玉溪市生态系统服务功能重要性主要是极重要,其面积为13556.94 km2,占玉溪市总面积的90.74%;一般重要地区分布较少,分布在玉溪市西南地区,主要分布在元江县;重要地区分布较离散,多分布在玉溪市东部地区,主要分布在红塔区、江川区、海通县、澄江市;极重要地区分布较广,涵盖了玉溪市各县区,主要分布在峨山县、易门县、新平县、华宁县;在不同重要性等级中,耕地和林地的总面积占比较大,耕地面积占比与生态系统服务功能重要性等级呈负相关,林地面积占比与生态系统服务功能重要性等级呈正相关,随着重要性等级的变化,二者呈此消彼长的规律。

Taking Yuxi City as the research object,combined with the actual situation and data of its ecological environment,this paper evaluated the importance of ecosystem service functions in Yuxi City and explored the internal mechanism of its importance pattern formation.The results showed that the importance of ecosystem service functions in Yuxi City was mainly extremely important,with an area of 13556.94 km2,accounting for 90.74%of the total area of Yuxi City;the distribution of general important areas was relatively small,located in the southwest of Yuxi City,mainly in Yuanjiang County;the distribution of important areas was relatively scattered,mostly in the eastern part of Yuxi City,mainly distributed in Hongta District,Jiangchuan District,Haitong County,and Chengjiang City;the extremely important areas were widely distributed,covering various counties and districts in Yuxi City,mainly distributed in Eshan County,Yimen County,Xinping County,and Huaning County;among different importance levels,the total area of cultivated land and forest land accounted for a relatively large proportion.The proportion of cultivated land area was negatively correlated with the importance level of ecosystem service functions,while the proportion of forest land area was positively correlated with the importance level of ecosystem service functions.As the importance level changed,the two showed a pattern of one declining and the other growing.