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Towards an integrative approach to evaluate the environmental ecosystem services provided by urban forest 预览
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作者 Samson Roeland Marco Moretti +11 位作者 Jorge Humberto Amorim Cristina Branquinho Silvano Fares Federico Morelli Ulo Niinemets Elena Paoletti Pedro Pinho Gregorio Sgrigna Vladimir Stojanovski Abhishek Tiwary Pierre Sicard Carlo Calfapietra 《林业研究:英文版》 CAS CSCD 2019年第6期1981-1996,共16页
As a Nature-Based Solution,urban forests deliver a number of environmental ecosystem services(EESs).To quantify these EESs,well-defined,reliable,quantifiable and stable indicators are needed.With literature analysis a... As a Nature-Based Solution,urban forests deliver a number of environmental ecosystem services(EESs).To quantify these EESs,well-defined,reliable,quantifiable and stable indicators are needed.With literature analysis and expert knowledge gathered within COST Action FP1204 GreenInUrbs,we proposed a classification of urban forest EESs into three categories:(A)regulation of air,water,soil and climate;(B)provisioning of habitat quality;and(C)provisioning of other goods and services.Each category is divided into EES types:(a)amelioration of air quality;restoration of soil and water;amelioration of the microclimate;removal of CO2 from the air;(b)provision of habitat for biodiversity;support for resilient urban ecosystems;provision of genetic diversity;and(c)provision of energy and nutrients;provision of grey infrastructure resilience.Each EES type provides one or more benefits.For each of these 12 benefits,we propose a set of indicators to be used when analyzing the impacts on the identified EESs.Around half of the 36 indicators are relevant to more than one single benefit,which highlights complex interrelationships.The indicators of wider applicability are tree and stand characteristics,followed by leaf physical traits and tree species composition.This knowledge is needed for the optimization of the EESs delivered by urban forests,now and in the future. 展开更多
关键词 URBAN FORESTS Environmental ECOSYSTEM services INDICATORS
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A spectral response approach for detecting dominant phytoplankton size class from satellite remote sensing 预览
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作者 Robert J W Brewin Samantha J Lavender +1 位作者 Nick J Hardman-Mountford Takafumi Hirata 《海洋学报:英文版》 SCIE CAS CSCD 2010年第2期 14-32,共19页
在海洋颜色遥感的一个重要目标是精确地包括多浮游植物碳周期模型的确认与潜在的使用检测不同浮游植物组;概括性地监视我们的海洋的健康,并且改进我们在浮游植物和他们的环境之间的 bio-geochemical 相互作用的理解。在这份报纸,一... 在海洋颜色遥感的一个重要目标是精确地包括多浮游植物碳周期模型的确认与潜在的使用检测不同浮游植物组;概括性地监视我们的海洋的健康,并且改进我们在浮游植物和他们的环境之间的 bio-geochemical 相互作用的理解。在这份报纸,一个新算法为在他们的光签名基于不同差别检测三个主导的浮游植物尺寸班被开发。这种技术在看看法传感器(SeaWiFS ) 数据系列的宽地的 10 年的 NASA 海上对独立联合卫星反射并且在 situ 颜料数据集和跑被验证。结果显示平均, 3.6% 全球海洋的表面层被 microplankton 统治, 18.0% 由 nanoplankton 并且 78.4% 由 picoplankton。然而,结果被看见变化取决于季节和海洋盆。 展开更多
关键词 卫星遥感探测 浮游植物 光谱响应 海洋水色遥感 SEAWIFS 美国航空航天局 优势 化学相互作用
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Practical Method Proposed to Estimate Silting’s Rate in Small and Hillside Dams 预览
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作者 Naima Alahiane Ahmed El Mouden +1 位作者 Abderrahmane Ait Lhaj Said Boutaleb 《水资源与保护(英文)》 2014年第10期930-943,共14页
The construction of small dams and hillside reservoirs is a common practice for dealing with erratic and unevenly distributed rainfalls in arid and semi arid areas. Moreover, these small hydraulics structures are reco... The construction of small dams and hillside reservoirs is a common practice for dealing with erratic and unevenly distributed rainfalls in arid and semi arid areas. Moreover, these small hydraulics structures are recommended as a solution to adapt to climate change in rural areas. They are fundamental for the sustainability of the water resources. However, these dams are potential sinks for upstream sediment. Therefore, it would be useful to monitor and measure the amount of sediments in small dams because it is necessary to understand siltation and better functioning of these vital structures. This control and these measurements require the application of the bathymetry or topography surveys which is too expensive for the responsible of these small dams. In this context, this paper proposes a simple and low cost method called: Triangulation of the estimated silted level. This method is based on direct measurement of the accessible silted level in dam. This new method is compared with another method based on the initial Elevation-Capacity curve of dam, usually used when the bathymetry is not attainable. The results of both of them have been verified with those of the bathymetry and electrical tomography methods and validated the proposal method as the most approximate. Therefore, this method is recommended as a new direct and simple technique to evaluate the amount of silting in small dams and hillside reservoirs. 展开更多
关键词 SMALL DAMS Evaluate Silting BATHYMETRY TRIANGULATION
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ASYMMETRIC SYNTHESIS OF 2-ALKYLALKANOIC ACIDS VIA ALKYLATION OF CHIRAL AMIDE ANIONS
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作者 林国强 HANS-ERIC HGBERG TORBJRN NORIN 《科学通报:英文版》 SCIE EI 1984年第5期632-634,
<正> In connection with the current work on the synthesis of chiral insect pheromones, general methods for the preparation of chiral 2-alkylalkanoic acids were needed. Several such methods have recently been des... <正> In connection with the current work on the synthesis of chiral insect pheromones, general methods for the preparation of chiral 2-alkylalkanoic acids were needed. Several such methods have recently been described. Meyers found that alkylation of chiral oxazoline anions followed by hydrolysis of the products gave chiral acids. 展开更多
关键词 CHIRAL hydrolysis AMIDE esters ALKYL reagent insect ammonium instead HYDROXIDE
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