Wetlands on the Qinghai-Tibetan Plateau (QTP) perform a dazzling array of vital ecological functions and are one of the most fragile ecosystems in the world. Timely and accurate information describing wetland resour...Wetlands on the Qinghai-Tibetan Plateau (QTP) perform a dazzling array of vital ecological functions and are one of the most fragile ecosystems in the world. Timely and accurate information describing wetland resources and their changes over time is becoming more important in their protection and conservation. By using remote sensing data, this study intended to investigate spatial distribution and temporal variations of wetlands on the QTP at different watershed scales from 1970s to 2010s. Results show that wetlands on the QTP have undergone widespread degradation from 1970s to 2010s, with nearly 6.4% of their area being lost. Areas of freshwater marsh, salt marsh and wet meadow declined by 46.6%, 53.9% and 15.6%, respectively, while lake area increased by 14.6%. The most extensive losses of natural wet/ands have occurred in endorheic basins, such as in the Kunlun-Altun-Qilian Drainage Basin and Qiangtang Basin, which shrank by 44.5% and 33.1%, respectively. A pronounced increase in temperature tends to facilitate the evaporation process and reduce water availability for wetlands, One-third of the wetlands on the QTP are under threat of being submerged due to lakes rising in recent years. More research is needed to gain insight into the interaction mechanisms behind observed variations and potential impacts from further warming in the future.展开更多
How to speed up the establishment of marine ecological compensation and the ecological compensation system is inevitable choice from ocean country to marine power.Therefore,construction of marine ecological compensati...How to speed up the establishment of marine ecological compensation and the ecological compensation system is inevitable choice from ocean country to marine power.Therefore,construction of marine ecological compensation mechanism is the effective means which incentives marine ecosystem services supply,improves the quality of marine ecology,and promotes the ocean to the green transformation.Combined with Dalian maritime case study in Liaoning Province,three dimensional interactive marine ecological compensation mechanism,the compensation frame work,path and operation mechanism were built up.Suggestions on accelerating the legislation process;perfecting the management system;establishing proper system for both incentive constraint and reward-punishment;increasing the source of Ocean Ecological Compensation funds;accelerating On the study of the Ocean Ecological Compensation Mechanism in Liaoning Area from the Angl-e of Ecological Civilization Based on Case Analysis of Dalian.展开更多
Aromatic compounds (ACs) in soil can induce competitive inhibition for soil NH3 oxidation, and nitrification inhibitors can be used to this end. A laboratory incubation experiment was performed with 12 nitroaromatic c...Aromatic compounds (ACs) in soil can induce competitive inhibition for soil NH3 oxidation, and nitrification inhibitors can be used to this end. A laboratory incubation experiment was performed with 12 nitroaromatic compounds (NACs), 15 amidoaromatic compounds (AACs) and 20 hydroxyaromatic compounds (HACs) to assess the inhibitory effects of ACs on soil nitrification. Based on these results, the critical and optimal concentrations of ACs were determined for better inhibitory effects. Most of the test ACs were able to inhibit soil nitrification; the effectiveness differed with soil type. Among the ACs, the NACs with m-nitryl, amino or hydroxyl and the AACs with a nitro group or a chlorine atom on aromatic ring or with a p-hydroxyl were more effective. 3-nitroaniline, 4-aminophenol and 3-nitrophenol showed the greatest potential as nitrification inhibitors. The critical concentration of these compounds in brown soil and cinnamon soil was found to be 0.5 mg kg-1 soil. Due to the toxicity, carcinogenicity and mutagenicity of ACs, further toxicological and ecotoxicological research is necessary before ACs are used as nitrification inhibitors in agricultural and horticultural practices.展开更多
With the development of metropolitan regions and the appearance of urban agglomerations, cities have been more closely related. For the restricted emergency rescue resource in a single city, it has become more and mor...With the development of metropolitan regions and the appearance of urban agglomerations, cities have been more closely related. For the restricted emergency rescue resource in a single city, it has become more and more imminent for the demand of the intercity collaborative resistance to major accident, so as to improve the protection capacity of urban security. In order to find an effective intercity, emergency rescue collaborative system, this paper introduces the concept and analysis method of ecosystem theory into intercity emergency, rescue. Based on the analysis of the formation-process of emergency rescue individual, population and community: a throe-level intercity emergency rescue collaborative system is constructed according to the characteristics of dynamics and structure of intercity emergency rescue ecosystem then the collaboration mechanism of information, resource and process in the interceity emergency rescue ecosystem is also studied in this paper; so as to offer available strategy and method for the ecosystem theory applied to intercity, emergency rescue. Through the studies of intereity emergency rescue ecosystem. it illuminates that the proposed emergency system can not Only cope with the major accident more timely and effectively but also integrate the intercity information resources and emergency rescue resource and process optimization.展开更多
The motto of Tongji University, whose name literally means "we are all in the same boat, and must work together to reach common goals", describes the harvest of ISEE leaders' mission to China in May 2007. ISEE Pres...The motto of Tongji University, whose name literally means "we are all in the same boat, and must work together to reach common goals", describes the harvest of ISEE leaders' mission to China in May 2007. ISEE President Joan Martinez-Alier, President-Elect Peter May and the society's founder and first President, Robert Costanza as well as ISEE member Robert Ayres, participated in a series of events and meetings in Shanghai and Beijing with a view to build institutional collaboration.展开更多
The decomposition of the environmental degradation cost in Benin Republic revealed that the agricultural activities are responsible of the greatest amount of this cost (76.1%). This situation is strengthened by the ...The decomposition of the environmental degradation cost in Benin Republic revealed that the agricultural activities are responsible of the greatest amount of this cost (76.1%). This situation is strengthened by the fallow periods shortening (and even suppression) in the southern Benin in general, because of demographic pressure. The promotion of some improved fallow technologies (IFT) was then launched some decades ago. This study focused on two IFT of high agro-ecological value, Mucuna pruriens and Acacia auriculiformis, in order to determine the influence of the farmers' wellbeing state on their farming systems in general, and on the adoption level of these two technologies in Godohou village (southern Benin). The data analysis revealed that: There was no significant difference between the farmers' amount knowing the agronomic and ecological value of Mucuna pruriens and Acacia auriculiformis from a level of prosperity to another; Three wealth levels were distinguished: The poor class (Ayatonon class), the less poor class (Metchivo-Houedeka class) and the non poor class (Hotonon class) which represented respectively 35.4%, 55.9% and 8.7%;The adoption rate of Mucuna and Acacia fallow was globally low in Godohou village (25.7%), but this adoption rate was lesser in the poorest class than in all other classes. This trend was confirmed if we integrate a global agro-ecological analysis of the farming systems practiced by the farmers.展开更多
In this work, the stability of an endoreversible Curzon-Ahlbom engine is analyzed, using Van der Waals gas as a working substance and the corresponding efficiency for this engine working at temperatures withinthe maxi...In this work, the stability of an endoreversible Curzon-Ahlbom engine is analyzed, using Van der Waals gas as a working substance and the corresponding efficiency for this engine working at temperatures withinthe maximum ecological regime. By mean s of a local stability analysis we find that a critical point of an almost linear system is stable andanalytically expressed in eigenvalues. After an arbitrarily small perturbation, the system state exponentially decays to a critical point, with either of two characteristic relaxation times, which are a function of the thermal conductance (a), heat capacity (C) and T=T2/T1. The behavior of relaxation times and solution of the systems are qualitatively shown by sketching its phase portrait, which results susceptible to operating regimes, i.e., the eigenvectors in the maximum ecological regime have a clockwise rotation with respect to the eigenvectors in the regime of maximumpower. Finally, it has to observe that afterto λvw = 1, approximation,ηVWE=4^-3ηC is obtained, where ηVWE is the Van der Waals efficiency atrnaximum ecological regime and r/c is Carnot's efficiency. Finally, it discussed the local stability and steady state of the energetic properties of the endoreversible engine.展开更多
基金Under the auspices of the National Key Research and Development Program of China(No.2016YFC050040106,2016YFA060230302)the National Science Foundation of China(No.41671087,41671081,41471081)the Technological Basic Research Program of China(No.2013FY111800)
文摘Wetlands on the Qinghai-Tibetan Plateau (QTP) perform a dazzling array of vital ecological functions and are one of the most fragile ecosystems in the world. Timely and accurate information describing wetland resources and their changes over time is becoming more important in their protection and conservation. By using remote sensing data, this study intended to investigate spatial distribution and temporal variations of wetlands on the QTP at different watershed scales from 1970s to 2010s. Results show that wetlands on the QTP have undergone widespread degradation from 1970s to 2010s, with nearly 6.4% of their area being lost. Areas of freshwater marsh, salt marsh and wet meadow declined by 46.6%, 53.9% and 15.6%, respectively, while lake area increased by 14.6%. The most extensive losses of natural wet/ands have occurred in endorheic basins, such as in the Kunlun-Altun-Qilian Drainage Basin and Qiangtang Basin, which shrank by 44.5% and 33.1%, respectively. A pronounced increase in temperature tends to facilitate the evaporation process and reduce water availability for wetlands, One-third of the wetlands on the QTP are under threat of being submerged due to lakes rising in recent years. More research is needed to gain insight into the interaction mechanisms behind observed variations and potential impacts from further warming in the future.
基金supported by the National Social Science Foundation: Research on Fiscal and Tax Policy Innovation and Mechanism of Coordinated Development of Regional Economy (14BJY003)Liaoning Social Science Foundation: Study on Ecological Compensation Mechanism of Liaoning Province (L13djy057)the Second Batch School of Marxism Major Research Direction Foundation Items of Liaoning Province: Study on Liaoning Province Ocean Strengthening Strategic Issues with Five Concepts Leading
文摘How to speed up the establishment of marine ecological compensation and the ecological compensation system is inevitable choice from ocean country to marine power.Therefore,construction of marine ecological compensation mechanism is the effective means which incentives marine ecosystem services supply,improves the quality of marine ecology,and promotes the ocean to the green transformation.Combined with Dalian maritime case study in Liaoning Province,three dimensional interactive marine ecological compensation mechanism,the compensation frame work,path and operation mechanism were built up.Suggestions on accelerating the legislation process;perfecting the management system;establishing proper system for both incentive constraint and reward-punishment;increasing the source of Ocean Ecological Compensation funds;accelerating On the study of the Ocean Ecological Compensation Mechanism in Liaoning Area from the Angl-e of Ecological Civilization Based on Case Analysis of Dalian.
基金Supported by the National Basic Research Program (973 Program) of China (No.2007CB109307)the National Science & Technology Pillar Program (No.2006BAD10B01)
文摘Aromatic compounds (ACs) in soil can induce competitive inhibition for soil NH3 oxidation, and nitrification inhibitors can be used to this end. A laboratory incubation experiment was performed with 12 nitroaromatic compounds (NACs), 15 amidoaromatic compounds (AACs) and 20 hydroxyaromatic compounds (HACs) to assess the inhibitory effects of ACs on soil nitrification. Based on these results, the critical and optimal concentrations of ACs were determined for better inhibitory effects. Most of the test ACs were able to inhibit soil nitrification; the effectiveness differed with soil type. Among the ACs, the NACs with m-nitryl, amino or hydroxyl and the AACs with a nitro group or a chlorine atom on aromatic ring or with a p-hydroxyl were more effective. 3-nitroaniline, 4-aminophenol and 3-nitrophenol showed the greatest potential as nitrification inhibitors. The critical concentration of these compounds in brown soil and cinnamon soil was found to be 0.5 mg kg-1 soil. Due to the toxicity, carcinogenicity and mutagenicity of ACs, further toxicological and ecotoxicological research is necessary before ACs are used as nitrification inhibitors in agricultural and horticultural practices.
基金supported by National Natural Science Foundation of China (Grant No.70671021)National Social Science Fund of China (Grant No.06BZZ019)Emergency Rescue Decision-Making Mechanism of Outsize Accidents in Nanjing (Grant No.200702011)
文摘With the development of metropolitan regions and the appearance of urban agglomerations, cities have been more closely related. For the restricted emergency rescue resource in a single city, it has become more and more imminent for the demand of the intercity collaborative resistance to major accident, so as to improve the protection capacity of urban security. In order to find an effective intercity, emergency rescue collaborative system, this paper introduces the concept and analysis method of ecosystem theory into intercity emergency, rescue. Based on the analysis of the formation-process of emergency rescue individual, population and community: a throe-level intercity emergency rescue collaborative system is constructed according to the characteristics of dynamics and structure of intercity emergency rescue ecosystem then the collaboration mechanism of information, resource and process in the interceity emergency rescue ecosystem is also studied in this paper; so as to offer available strategy and method for the ecosystem theory applied to intercity, emergency rescue. Through the studies of intereity emergency rescue ecosystem. it illuminates that the proposed emergency system can not Only cope with the major accident more timely and effectively but also integrate the intercity information resources and emergency rescue resource and process optimization.
文摘The motto of Tongji University, whose name literally means "we are all in the same boat, and must work together to reach common goals", describes the harvest of ISEE leaders' mission to China in May 2007. ISEE President Joan Martinez-Alier, President-Elect Peter May and the society's founder and first President, Robert Costanza as well as ISEE member Robert Ayres, participated in a series of events and meetings in Shanghai and Beijing with a view to build institutional collaboration.
文摘The decomposition of the environmental degradation cost in Benin Republic revealed that the agricultural activities are responsible of the greatest amount of this cost (76.1%). This situation is strengthened by the fallow periods shortening (and even suppression) in the southern Benin in general, because of demographic pressure. The promotion of some improved fallow technologies (IFT) was then launched some decades ago. This study focused on two IFT of high agro-ecological value, Mucuna pruriens and Acacia auriculiformis, in order to determine the influence of the farmers' wellbeing state on their farming systems in general, and on the adoption level of these two technologies in Godohou village (southern Benin). The data analysis revealed that: There was no significant difference between the farmers' amount knowing the agronomic and ecological value of Mucuna pruriens and Acacia auriculiformis from a level of prosperity to another; Three wealth levels were distinguished: The poor class (Ayatonon class), the less poor class (Metchivo-Houedeka class) and the non poor class (Hotonon class) which represented respectively 35.4%, 55.9% and 8.7%;The adoption rate of Mucuna and Acacia fallow was globally low in Godohou village (25.7%), but this adoption rate was lesser in the poorest class than in all other classes. This trend was confirmed if we integrate a global agro-ecological analysis of the farming systems practiced by the farmers.
文摘In this work, the stability of an endoreversible Curzon-Ahlbom engine is analyzed, using Van der Waals gas as a working substance and the corresponding efficiency for this engine working at temperatures withinthe maximum ecological regime. By mean s of a local stability analysis we find that a critical point of an almost linear system is stable andanalytically expressed in eigenvalues. After an arbitrarily small perturbation, the system state exponentially decays to a critical point, with either of two characteristic relaxation times, which are a function of the thermal conductance (a), heat capacity (C) and T=T2/T1. The behavior of relaxation times and solution of the systems are qualitatively shown by sketching its phase portrait, which results susceptible to operating regimes, i.e., the eigenvectors in the maximum ecological regime have a clockwise rotation with respect to the eigenvectors in the regime of maximumpower. Finally, it has to observe that afterto λvw = 1, approximation,ηVWE=4^-3ηC is obtained, where ηVWE is the Van der Waals efficiency atrnaximum ecological regime and r/c is Carnot's efficiency. Finally, it discussed the local stability and steady state of the energetic properties of the endoreversible engine.