scholarly journals Assessment of Ecological Carrying Capacity and Ecological Security in China’s Typical Eco-Engineering Areas

2020 ◽  
Vol 12 (9) ◽  
pp. 3923
Author(s):  
Yaxian Zhang ◽  
Jiangwen Fan ◽  
Suizi Wang
Keyword(s):  
Ecological Restoration ◽  
Carrying Capacity ◽  
Water Conservation ◽  
Dynamic Change ◽  
Indicator System ◽  
Limiting Factors ◽  
Practical Significance ◽  
Future Research ◽  
Ecological Security ◽  
Ecological Carrying Capacity

The implementation of ecological restoration programs is intensively changing the original ecological carrying capacity and the status of ecological security. To evaluate the spatiotemporal variation of ecological carrying capacity and ecological security in China’s eco-engineering areas, an indicator system of ecological carrying capacity and ecological security should be developed. This study developed an evaluation indicator system that contains 29 indicators. The indicators were generated by long-time series and multi-source data. The indicator system presents the relationship between ecological carrying capacity and ecological security and reflects the dynamic change of them in eco-engineering areas. We selected the Three-River Headwaters Region (TRHR) and implemented the Ecological Conservation and Construction Program (ECCP) as a case study. The results showed the variation of ecological carrying capacity (ECC) and ecological security (ES) in the TRHR before (2000–2004), during early term (2005–2009), and during medium term (2010–2015) implementation of ECCP, and limiting factors of ecological carrying capacity and ecological security in TRHR was analyzed. The results showed that the ECC index and the ES index were significantly increase, indicating that the ECC improved and that the ES state got better in the TRHR after implementing ECCP. The water conservation was the major factors limiting the increase of the ECC. The leading factors limiting the improvement of the ES were educational expenditure before 2010 and turned into proportion of tertiary industry and investments for ecological restoration after 2010. The implementation of the ECCP has improved the ES state but has also resulted in new problems. It provides a scientific reference for future research on the indicator system of ecological carrying capacity and ecological security in eco-engineering areas and also has vital practical significance to guide the sustainable development of ecological restoration programs.

scholarly journals Research on Evaluation of Ecological Carrying Capacity of Qinghai Province Based on PSR Model

2021 ◽  
Vol 293 ◽  
pp. 01017
Author(s):  
Xiaoyong Li ◽  
Haifa Jia ◽  
Falan Zhao
Keyword(s):  
Carrying Capacity ◽  
Comprehensive Evaluation ◽  
Entropy Method ◽  
Provincial Government ◽  
Evaluation Index System ◽  
Practical Significance ◽  
Ecological Civilization ◽  
Qinghai Province ◽  
Ecological Carrying Capacity ◽  
Index Evaluation

Quantitative research and evaluation of ecological carrying capacity in Qinghai Province is in line with the requirements of the 13th five-year plan, and is of practical significance to the construction of ecological civilization in Qinghai Province. Based on the PSR model, this paper constructs the evaluation index system of ecological carrying capacity from three aspects of pressure, state ,and response, uses the entropy method to determine the index weight coefficient, and comprehensively evaluates the changing trend of ecological carrying capacity since the 12th Five Year Plan of Qinghai Province from the perspectives of economy, society, resources, and environment. The results show that: from 2011 to 2019, the comprehensive evaluation of ecological carrying capacity in Qinghai Province shows a trend of first decreasing and then increasing, the response index evaluation increases greatly, the state index evaluation shows a fluctuating growth, and the pressure index is relatively stable. Based on this, the PSR model and entropy method are typical and quantifiable, which can provide a reference for Qinghai provincial government to control the ecological environment, study ecological sustainability and delimit the ecological red line.

Assessment of ecological carrying capacity of Sparus macrocephalus in Daya Bay based on an ecopath model

2019 ◽  
Vol 26 (1) ◽  
pp. 1
Author(s):  
Mengyi HUANG ◽  
Shannan XU ◽  
Yong LIU ◽  
Yayuan XIAO ◽  
Teng WANG ◽  
...  
Keyword(s):  
Carrying Capacity ◽  
Daya Bay ◽  
Ecological Carrying Capacity ◽  
Ecopath Model ◽  
Sparus Macrocephalus

scholarly journals How Much Is Enough? First Steps to a Social Ecology of the Pergamon Microregion

Land ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 479
Author(s):  
Julian Laabs ◽  
Daniel Knitter
Keyword(s):  
Carrying Capacity ◽  
Agricultural Production ◽  
Large Population ◽  
Future Research ◽  
Limiting Factor ◽  
Cultural Dynamics ◽  
Imperial Period ◽  
Self Sufficiency ◽  
Complementary Region ◽  
The City

In this study, we present a transparent and reproducible approach to model agricultural production with respect to environmental characteristics and available labour. Our research focuses on the city of Pergamon and its surroundings, with an emphasis on the transition between the Hellenistic and Roman Imperial Period, where widespread demographic changes took place. We investigated the degree of local self-sufficiency using different concepts of a city’s complementary region. Using simple topographic derivatives, we derive a measure of environmental suitability that we translate into a carrying capacity index. Our results show that workforce was not a limiting factor for local self-sufficiency. However, environmental carrying capacity may have been limiting in a scenario with a large population. An active investment into the environment, e.g., by the construction of terraces, could have helped to increase the degree of self-sufficiency. Future research should investigate the level of resilience of such a coupled socio-ecological system in relation to environmental and socio-cultural dynamics.

scholarly journals Forest Quality Dynamic Change and Its Driving Factors Accompanied by Forest Transition in China

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 733
Author(s):  
Li Gu ◽  
Zhiwen Gong ◽  
Yuankun Bu
Keyword(s):  
Fixed Effects ◽  
Temporal Dynamics ◽  
Spatial Clustering ◽  
Dynamic Change ◽  
Forest Area ◽  
Future Research ◽  
Suitable Model ◽  
Forest Transition ◽  
Significance Level ◽  
Province Level

As ecological and environmental issues have received continuous attention, forest transition has gradually become the frontier and a hot issue, which have implications for biodiversity and ecosystem functioning. In this study, the spatial-temporal dynamics and the spatial determinants of forest quality were investigated using spatial econometric regression models at the province level, which contained 31 provinces, autonomous regions, and municipalities in China. The results showed that forest area, forest volume, forest coverage, and forest quality have greatly increased as of 2018, but uneven forest distribution is an important feature of forest adaptation to the environment. The global Moran’s I value was greater than 0.3, and forest quality of the province level had a positive spatial correlation and exhibited obvious spatial clustering characteristics. In particular, the spatial expansion of forest quality had shown an accelerated concentration. The most suitable model for empirical analysis and interpretation was the Spatial Durbin Model (SDM) with fixed effects. The average annual precipitation and the area ratio of the collective forest were positively correlated with forested quality (significance level 1%). Ultimately, this framework could guide future research, describe actual and potential changes in forest quality associated with forest transitions, and promote management plans that incorporate forest area changes.

Cervical insufficiency: a noteworthy disease with controversies

2020 ◽  
Vol 48 (7) ◽  
pp. 648-655
Author(s):  
Yu Han ◽  
Mengnan Li ◽  
Huijing Ma ◽  
Hailan Yang
Keyword(s):  
Risk Factors ◽  
Diagnosis And Treatment ◽  
Practical Significance ◽  
Future Research ◽  
Cervical Insufficiency ◽  
Factors Associated ◽  
The World ◽  
Potential Risk Factors ◽  
Recurrent Pregnancy Losses ◽  
Recurrent Abortions

AbstractCervical insufficiency (CI) is a mainly disease leading to recurrent abortions and preterm birth which may present in about 1% of obstetric populations. Recurrent pregnancy losses caused by CI incur serious economic burdens on society as well as huge psychological burdens to family members. However, many patients even clinicians in some areas of the world still remain confused about this disease. At the same time, the etiology of CI is still uncertain and it is still a controversial disease in diagnosis and treatment. This article summarizes the potential risk factors associated with CI, which could be worthy of attention and helpful for future research. It also reviews the methods for diagnosis and treatment of CI to better understand this noteworthy disease, as well as presents the related consensus and controversies according to the newly updated guidelines, which has practical significance for conducting more in-depth investigations in the future.

Сonceptual assessment of the implementation of the principles of inclusive rural areas development with the participation of agroholding integrated formations

Ekonomika APK ◽  
2021 ◽  
Vol 317 (3) ◽  
pp. 97-111
Author(s):  
Oleksandr Shpykuliak ◽  
Mykola Ihnatenko ◽  
Andrii Shvets
Keyword(s):  
Rural Areas ◽  
Agricultural Sector ◽  
Inclusive Development ◽  
Practical Significance ◽  
Future Research ◽  
Socially Responsible ◽  
Responsible Management ◽  
Analysis And Synthesis ◽  
Methodological Assessment

The purpose of the article is to make conceptual assessments of the implementation of the principles of inclusive rural areas development with the participation of agroholding integrated formations. Research methods. In the course of the research a number of general scientific and special methods were used, in particular: system-structural analysis and synthesis as the main methodological tool (in the analysis of directions of social responsibility and inclusive development of agroholding integrated formations); monographic (in determining the essence and methodological assessment of the role of agroholding integrated formations as integrated structures in the inclusive development of Ukraine's economy); extrapolations (with substantiation of potential and possibilities of strengthening of inclusive orientation in development of agroholding integrated formations for the future). Research results. The methodological context of inclusiveness in the effects of management in the agricultural sector of the economy in the formation of the concept of sustainability is outlined. Institutional and organizational-economic characteristics are revealed and priority roles of agroholding integrated formations in realization of principles of inclusive development of rural territories are identified. The emphasis on the direction of development of agroholding integrated formations on realization of projects of socially responsible management which will consider features of development of rural territories is defined as effective and methodically expedient. Scientific novelty. The methodological context of inclusiveness in the effects of management in the agricultural sector of the economy in the formation of the concept of sustainability is outlined. Institutional and organizational-economic characteristics are revealed and priority roles of agroholding integrated formations in realization of principles of inclusive development of rural territories are identified. The emphasis on the direction of development of agroholding integrated formations on realization of projects of socially responsible management which will consider features of development of rural territories is defined as effective and methodically expedient. Practical significance. Methodological substantiation of organizational and economic characteristics and conceptualization of the role of agroholding integrated formations in the implementation of the principles of inclusive rural areas development with proof of the need for stimulating involvement of this type of structures in the implementation of socially responsible management with projection to achieve sustainability through inclusiveness. Tabl.: 2. Refs.: 50.

Application of Modified Ecological Footprint Model: A Case Study of Tibet, China

2013 ◽  
Vol 295-298 ◽  
pp. 987-991
Author(s):  
Guan Nan Cui ◽  
Xuan Wang
Keyword(s):  
Economic System ◽  
Carrying Capacity ◽  
Ecological Footprint ◽  
System Development ◽  
Energy Resources ◽  
Emergy Analysis ◽  
Development Index ◽  
Footprint Model ◽  
Ecological Carrying Capacity

To improve the ecological footprint model in aspect of reflecting sustainability of the economic, social and technological, the emergy analysis and socio-economic system development index were introduced into the model. The modified ecological footprint model was applied in the calculation of ecological carrying capacity and ecological footprint in Tibet, China. The ecological carrying capacity/cap is 19.13hm2, and the ecological footprint/cap is 8.96hm2. The result shows that the Tibet region is under the condition of ecological surplus and it is suitable for further programs development to some extent. But the high proportion of energy resources, cement and fertilizer utility should draw attention during the exploitation or construction progress.

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