| 1 | 干热河谷植物沙丘形态及植物功能性状特征与土壤分形维数的关系显示文摘为了解植物沙丘形态及植物功能性状特征对坡面泥沙拦截的作用机制,以干热河谷典型区蒋家沟流域为研究区,采用典型样地调查、野外实地观测和室内试验处理的方法,测定失稳性坡面42个植物沙丘(包括扭黄茅20株、拟金茅13株、丛毛羊胡子草9株)的形态特征、植物功能性状特征和沙丘土壤的颗粒组成,并运用分形理论计算分形维数,分析分形维数与植物沙丘形态特征及功能性状特征间的相关关系.结果表明:(1)3种植物沙丘的形态特征及植物的功能性状特征均无显著差异性.(2)3种植物沙丘间、沙丘与上方30 cm处的土壤各粒径百分比含量和分形维数均无显著差异.(3)干热河谷植物沙丘土壤颗粒的分形维数(D)与植物含水率、根系深度呈极显著正相关性(P <0.01),与沙丘长度显著正相关(P <0.05),与植物其他形态、功能性状特征和沙丘其他形态特征间均无显著相关性.上述研究表明不同植物沙丘各类特征间均无显著差异;沙丘未改变坡面原有土壤颗粒的分布特征;沙丘土壤分形维数可表征植物含水率、根系深度及沙丘长度的大小.结果有助于加深植物控制土壤侵蚀效应的认识,可为干热河谷水土流失治理提供科学依据.(图5表1参35) | 黄语芯 虞西尔 高若允 杨柳生 林勇明 王道杰 李键 | 2022 | 应用与环境生物学报2022，28，4： | 2 |
| 2 | Status,approaches,and challenges of ecosystem services exploration in Ethiopia:A systematic review显示文摘Healthy ecosystems benefit humans in various forms,and ecosystem services(ESs)are the benefits reaped by people in various forms.However,increase in global human population and the resulting anthropogenic activities have led to rapid alterations in the composition,structure,and functions of the ecosystems as well as their degradation,increasing the losses associated with ES values.Livelihoods of people in several developing countries are highly dependent on their surrounding ecosystems and the services they provide.Therefore,management and reduction of ecosystem modification are required;especially in developing countries,this requirement is even more urgent.In Africa,ecosystem-based studies are limited and in still in their initial stages.Hence,this paper examines dynamic Ethiopian ESs in Africa from 2010 to 2019 based on a systematic bibliometric analysis of articles from the Scopus database using a set of standard criteria.In total,73 articles were published on Africa,including Ethiopia.The results reveal that the spatial distribution trend of ES studies is unevenly distributed,where most studies were conducted in the central highlands,followed by southwestern regions,with no studies on the western part of Ethiopia.Regarding service providing units(SPUs),the urban ecosystem and agroecosystem accounted for 25%and mixed ecosystems accounted for 20%.Furthermore,a total of 67 specific ESs were investigated by researchers,among which 81.25%of the specific ESs were classified into two ES categories.Provisioning ES(40.29%)dominated across all of the ES types while the cultural ES(5.97%)type has received little attention.Based on keywords,ESs were strongly linked to South Africa,Ethiopia,and biodiversity.In terms of the co-authorship network,authors from the United Kingdom,Italy,Burkina Faso,the Netherlands,and Germany actively collaborated with the Ethiopian researchers,and approximately 50%of the studies were aimed at estimating the value of the ESs through an applied mixed mode of ES study approaches.This review indicates that,due to land use land cover(LULC)changes from 1985 to 2015,approximately US$149.5 million or US$4.98 million annually in ES values were lost.Moreover,there is a critical need to extend ES studies to entire Ethiopia to capture the spatial and socioeconomic uniqueness of various ecosystems and focus more on multiple ES categories as a means to address ES synergies and provide unit-services to strengthen the relations among benefiting areas in Ethiopia. | Mekonnen Amberber Mekuria Argaw Gudina Legese Feyisa Sileshi Degefa | 2020 | Chinese Journal of Population,Resources and Environment2020，18，3： | 1 |
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