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Pedosphere 2010年第6期20卷 681-691页

作者： D.TARRASóN G.OJEDA O.ORTIZ J.M.ALCAIZ centre for ecological research and forestry applications Autonomous University of Barcelona IMAR-Coimbra Interdisciplinary centre Department of ZoologyUniversity of Coimbra

The recycling of suitable organic wastes can enhance soil fertility via effects on soil physical, chemical and biological properties. To compare the effects of digested (DS), thermally dried (TDS) and composted dewatered (CDS) sewage sludge on soil microbiological properties, an experiment was conducted at field sites for more than one year (401 d) when applied to two Mediterranean degraded soils (loam and loamy sand soils). All three types of sewage sludge had a significant effect on measured parameters. In a short time, the plots of both loamy sand and loam soils amended with TDS showed the highest microbial basal respiration (loam soil: P < 0.01; loamy sand soil: P < 0.001) and carbon mineralization coefficient (loam soil: P < 0.01; loamy sand soil: P < 0.001). Furthermore, on loamy sand soil, the plots amended with TDS showed the highest microbial metabolic quotient (qCO 2 ) (P < 0.05). This study revealed that the addition of sludge caused transient non-equilibrium effects on almost all soil microbial properties. However, there were no differences one year later because the remaining organic carbon was stable and quite similar in all treatments. These results may have practical implications for the rehabilitation of degraded soils.

关键词： basal respiration composted sludge soil microbial biomass thermally dried sludge

Multi-DAGs Scheduling Integrating with Security and Availability in Cloud Environment

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Chinese Journal of Electronics 2015年第4期24卷 709-716页

作者： LIU Yaqiu SHAO Hongrun JING Weipeng QIU Zhaowen The College of Information and Computer Engineering Northeast Forestry University Heilongjiang Province Engineering Technology research centre for forestry ecological Big Data Storage and High Performance (Cloud) Computing

In view of the issue concerns multiple Directed acyclic graphs(DAGs) scheduling in multi-tenant cloud computing environment, a scheduling strategy that integrate security and availability is proposed to satisfy the tenants’ requirements for resource security and availability, as thus it can not only protect the users’ privacy and data security but also advance the success rate. The proposal assesses resource reputation to ensure jobs can be scheduled onto relatively security nodes; during task scheduling, it classifies the DAGs to achieve fairness; in the process of resources allocation, the objective function would maximize the user’s security satisfaction and minimize the deviation of availability; meanwhile, it takes advantage of "time chips" flexibly to promote resource utilization rate; afterwards, we present a Greedy algorithm integrating with security and availability(GISA) to implement the strategy. The experimental results show the correctness and superior of the novel strategy.

关键词： Multi-DAGs scheduling Security Availability Resource utilization

Building the World Wide Hypermap(WWH)with a RESTful architecture

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International Journal of Digital Earth 2014年第3期7卷 175-193页

作者： Joan Maso Xavier Pons Alaitz Zabala Center for ecological research and forestry applications(CREAF) Universitat Autònoma de BarcelonaBarcelonaSpain Department of Geography Universitat Autònoma de BarcelonaBarcelonaSpain

The hypermap concept was introduced in 1992 as a way to hyperlink geospatial features to text,multimedia or other geospatial *** then,the concept has been used in several applications,although it has been found to have some *** the other hand,Spatial Data Infrastructures(SDIs)adopt diverse and heterogeneous service oriented architectures(SOAs).They are developed by different standard bodies and are generally disconnected from mass market web *** work expands the hypermap concept to overcome its limitations and harmonise it with geospatial resource oriented architecture(ROA),connecting it to the semantic web and generalising it to the World Wide Hypermap(WWH)as a tool for building a single‘Digital Earth’.Global identifiers,dynamic links,link purposes and resource management capabilities are introduced as a solution that orchestrates data,metadata and data access services in a homogeneous *** is achieved by providing a set of rules using the current Internet paradigm formalised in the REpresentational State Transfer(REST)architecture and combining it with existing Open Geospatial Consortium(OGC)and International Organization for Standardization(ISO)standards.A reference implementation is also presented and the strategies needed to implement the WWH,which mainly consist in a set of additions to current Geographic Information System(GIS)products and a RESTful server that mediates between the Internet and the local GIS applications.

关键词： SDI URI standards hypermap RESTful

SINGULAR SPECTRUM ANALYSIS:METHODOLOGY AND APPLICATION TO ECONOMICS DATA

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Journal of Systems Science & Complexity 2009年第3期22卷 372-394页

作者： Hossein HASSANI Anatoly ZHIGLJAVSKY Institute for Trade Studies and research (ITSR) centre for Optimisation and Its applications School of Mathematics centre for Optimization and Its applications School of Mathematics

This paper describes the methodology of singular spectrum analysis (SSA) and demonstratethat it is a powerful method of time series analysis and forecasting,particulary for economic time *** authors consider the application of SSA to the analysis and forecasting of the Iranian nationalaccounts data as provided by the Central Bank of the Islamic Republic of Iran.

关键词： Economic time series forecasting Iranian national accounts SSA.

Photosynthesis adaption in Korean pine to gap size and position within Populus davidiana forests in Xiaoxing’anling, China

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Journal of forestry research 2022年第5期33卷 1517-1527页

作者： Xuannan Li Yahui Wang Zhihui Yang Ting Liu Changcheng Mu Center for ecological research Northeast Forestry UniversityHarbinHeilongjiang 150040People’s Republic of China

Forest gaps restrict the restoration of temperate secondary forest to broad-leaved Korean pine forest in zonal climax vegetation by affecting the growth of Korean pine(Pinus koraiensis).However,the photo synthetic adaptability of Korean pine to gap size and position within the gap is *** order to explore the adaptability of young Korean pine(35 years) to different gap sizes in Xiaoxing’anling,photo synthetic capacity and microenvironmental factors(leaf temperature,light transmittance) of Korean pine needles in three positions in the gap(central,transition,and edge areas) were *** gaps were identified in the secondary Populus davidiana forest:a large 201 m^(2) gap,a middle 112 m^(2) gap,and a small 50 m^(2) gap;12 m^(2) of the understory was sampled as a *** results show that:(1) maximum net photosynthetic rate(P_(max)) in needles of Korean pine growing in the large gap was higher than in the small gap,and P_(max) in the centre in the same gap was higher than in the transition and edge areas;(2) light saturation point(LSP) and photosynthetic quantum yield(AQY)of needles in the large gap were higher than in the small gap,while the light compensation point(LCP) and chlorophyll contents of needles were lower in the small gap;and,(3)P_(max) had a significant positive correlation with temperature and light *** is suggested that the larger the gap in secondary Populus davidiana forests,the greater the change in light intensity and temperatures,the stronger the light adaption of Korean pine needles and the higher the photosynthetic ***,in the recovery of broadleaved/Korean pine forests,suitable gaps should be created and gap microhabitats fully utilized to accelerate the restoration process.

关键词： Pinus koraiensis Gap size Position in the gap Maximum net photosynthetic rate

Exploratory analysis of structural diversity indicators at stand level in three Italian beech sites and implications for sustainable forest management

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Journal of forestry research 2019年第1期30卷 121-127页

作者： Giada Bertini Claudia Becagli Ugo Chiavetta Fabrizio Ferretti Gianfranco Fabbio Luca Salvati CREA Research Centre for Forestry and Wood

The present study introduces an exploratory data analysis based on structural indicators with the aim to assess the effect of silvicultural practices on tree stand structure. The study was carried out in three Italian beech forests of different ages with stand structures that originated from dissimilar regeneration and cultivation techniques(Cansiglio, northern Italy, Chiarano, central Italy,and Mongiana, southern Italy). Ten structural indicators were considered when investigating the latent multivariate relationship between stand structure attributes before and after thinning operations by using a multiway factor analysis(MFA). The MFA results identified the older stand at Cansiglio as more homogeneous for cultivation regimes,and more stable to practices when compared with the younger sites(Chiarano and Mongiana). Heterogeneous stands were sensitive to silvicultural practice thus suggesting their possible impact on forest attributes. The proposed approach proved to be an operational tool to evaluate comprehensively the response of forest structure to planned interventions.

关键词： Forest diversity Multiway factor analysis Silviculture Structural diversity indicators Tree stand structure

Biodiversity and ecological assessments of Indian sacred groves

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Journal of forestry research 2014年第1期25卷 21-28页

作者： Rajasri Ray M.D.S.Chandran T.V.Ramachandra Energy and Wetland research Group Centre for Ecological SciencesIndian Institute of Science

Sacred groves are patches of forests preserved for their spiri- tual and religious significance. The practice gained relevance with the spread of agriculture that caused large-scale deforestation affecting bio- diversity and watersheds. Sacred groves may lose their prominence nowadays, but are still relevant in Indian rural landscapes inhabited by traditional communities. The recent rise of interest in this tradition encouraged scientific study that despite its pan-Indian distribution, focused on India＇s northeast, Western Ghats and east coast either for their global/regional importance or unique ecosystems. Most studies focused on flora, mainly angiosperms, and the faunal studies concentrated on vertebrates while lower life fomas were grossly neglected. Studies on ecosystem functioning are few although observations are available. Most studies attributed watershed protection values to sacred groves but hardly highlighted hydrological process or water yield in comparison with other land use types. The grove studies require diversification from a stereo- typed path and must move towards creating credible scientific foundations for conservation. Documentation should continue in unexplored areas but more work is needed on basic ecological functions and ecosystem dynamics to strengthen planning for scientifically sound sacred grove management.

关键词： biodiversity conservation ecosystem service endemics sacred grove

Spatiotemporal variation in forest fire danger from 1996 to 2010 in Jilin Province,China

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Journal of forestry research 2017年第5期28卷 983-996页

作者： Yanlong Shan Yonghe Wang Mike Flannigan Shuyuan Tang Pingyan Sun Fengguo Du Provincial Key Laboratory of forestry and ecological Environment Forestry CollegeBeihua University Northern forestry centre Canadian Forest ServiceNatural Resources Canada The Department of Renewable Resources The University of Alberta forestry College Beihua University forestry Department of Jilin Province

We evaluated the spatial and temporal patterns of forest fires in two fire seasons (March to June and September to November) from 1996 to 2010 in Jilin Province, China, using the Canadian Forest Fire Weather Index System. Fire data were obtained from the Provincial Fire Agency, and historical climate records of daily weather observations were collected from 36 weather stations in Jilin and its neighboring provinces. A linear regression model was used to analyze linear trends between climate and fire weather indices with time treated as an independent variable. Correlation analysis was used to detect correlations between fire frequency, areas burned, and fire weather indices. A thin-plate smooth spline model was used to interpolate the point data of 36 weather stations to generate a surface covering the whole province. Our analyses indicated fire frequency and areas burned were significantly correlated with fire weather indices. Overall, the Canadian Forest Fire Weather Index System appeared to be work well for determining the fire danger rating in Jilin Province. Also, our analyses indicated that in the forthcoming decades, the overall fire danger in March and April should decrease across the province, but the chance of a large fire in these months would increase. The fire danger in the fall fire season would increase in the future, and the chance of large fire would also increase. Historically, because most fires have occurred in the spring in Jilin Province, such a shift in the future fire danger between the two fire seasons would be beneficial for the province's fire management.

关键词： Canadian Forest Fire Weather Index System Correlation analysis Human-caused fires Linear regression Thin-plate smooth spline model

The challenges of sequestering terrestrial carbon

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National Science Review 2022年第8期 9-10页

作者： Josep Pe?uelas Center for ecological research and forestry applications(CREAF) Global Ecology Unit CREAF-CSIC-UAB Spanish National Research Council(CSIC)

Nature may become a powerful ally in tackling climate *** is growing that ‘nature-based climatic solutions’(Nb CS) can help us to transition toward a society with zero net emissions and thus protect us from climate change and its consequent impacts while supporting biodiversity and securing ecosystem services. The actual potential of Nb CS to provide the intended benefits, however, has not been rigorously assessed.

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Climatic and fire determinants of early life-history stages in the Mediterranean shrub Cistus albidus

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Journal of Plant Ecology 2020年第1期13卷 3-11页

作者： Sandra Saura-Mas Anna Saperas Franciso Lloret Center for ecological research and forestry applications(CREAF) E 08193 BellaterraBarcelonaSpain Unit of Ecology Department of Animal and Plant Biology and EcologyAutonomous University of BarcelonaE-08193 BellaterraBarcelonaSpain

Aims Cistus albidus reproductive traits have been studied on typical Mediterranean shrublands along a water availability gradient in Northeastern Iberian *** of this species is known to be highly favoured by ***,Mediterranean species are particularly dependent on water ***,we establish the hypothesis that in addition to fire disturbance,seedling recruitment in this Mediterranean seeder will be improved in drought-induced episodes resulting in generalized canopy *** Individuals of several populations of *** were collected and the size,weight and number of fruits and seeds were *** tests were also carried out on five pre-germination treatments:seeds’exposure to heat shock,imbibition,two cycles of imbibition/desiccation and the combination of heat shock and imbibition and imbibition/desiccation ***,the number of seedlings after a drought event was surveyed in the field and correlated with canopy *** findings Our study shows the variability of the *** reproductive traits,such as germination rate or fruit production,along the water availability *** variability resulted in a decrease in fruit production but an increase in successful germination under drier *** albidus seeds increased germination with heat,demonstrating their ability to successfully establish after ***,recruitment was not exclusively fire dependent since seedling establishment was higher under *** canopies that had collapsed after the extreme ***,adult density increased *** die-off and mortality,as well as seedling *** results suggest that this species exhibits a trade-off between different reproductive outcomes(*** production ***),which in turn is determined by *** study also provides evidence of how intra-specific competition,climate,particularly drought events and fire disturbance,can determine th

关键词： seeder germination Cistus albidus life history Mediterranean fire drought resilience