叠石塘山 澳门的森林

<正>澳门的最高山是叠石塘山,又名塔石塘山,在澳门南部的离岸小岛——路环岛上。山上长达8公里的路环步行径四通八达,能引领游人前往不同的景点。中国澳门,面积只有31.3平方公里,却居住着近60万人口,是世界上人口密度最大的地区。森林对澳门人来说,到底意味着什么?在澳门的最高峰,又可听到什么样的故事?海拔172.4米的最高点澳门位于中国广东省南端珠江三角洲的西岸,北与珠海市的拱北相连,西与珠海市的湾仔、横琴岛隔水     

浑善达克沙地飞播造林成效初探

浑善达克沙地地处首都北京正北,直线距离180公里。沙地总面积7.1万平方公里,其中在锡盟境内5.8万平方公里。地貌特点是沙丘、湖泊、盆地及剥蚀高地交错分布。沙丘形态多样,以沙垄、梁窝状沙丘和新月型沙丘为主,沙垄之间同向延伸着平坦沙地、草甸和灌丛地,植物种类繁多,植被类型     

Climate and land-use change jointly determine the spatial-temporal changes of ecosystem services in Hainan and Haibei Tibetan Autonomous Prefectures，Qinghai Province北大核心CSCD

Evaluating the spatial-temporal dynamics and driving factors of ecosystem services is fundamental to the understanding of how to maintain and improve those ecosystem services. Alpine regions are both a hotspot of ecosystem service supply，and sensitive and vulnerable to climate change. However，there are few systematic studies investigating the joint role of land-use change and climate change in shaping the spatial-temporal dynamics of alpine ecosystem services. Here，we first used models of ecosystem services to quantify changes in seven ecosystem services and in ecosystem multiserviceability from 2000 to 2015 in Haibei and Hainan Tibetan Autonomous Prefectures on the northeastern Qinghai-Tibetan Plateau. Next，we investigated the relative importance of climate change，population density change，land-use change and the interactions between climate change and land-use change effects on ecosystem services using generalized linear models. We found that ecosystem services increased in the south while decreased in the north from 2000 to 2015. Land use change（relative contribution was 34%）was the major factor affecting food supply. Net ecosystem productivity（NEP）was affected by temperature change（relative contribution was 77%）. Water purification（nitrogen and phosphorus retention），soil retention，water yield and water retention were affected by precipitation change （relative contributions were 63%，48%，74%，86% and 75%，respectively）. Ecosystem multiserviceability was also affected by precipitation. In addition to the service of soil retention，the effects of climate change（i. e. precipitation and temperature）on other ecosystem services and ecosystem multiserviceability varied with land-use change （interaction，P<0. 001）. Our study highlights that realizing the sustainable development of ecosystem services needs to pay attention to both land-use change and the interactions between climate change and land-use change and optimizing the spatial-temporal allocation of ecosystem services to improve ecosystem multiserviceability in alpine regions. © 2022 Editorial Office of Acta Prataculturae Sinica. All rights reserved.