Nitrogen and phosphorus retention budgets of a semiarid plain basin under different human activity intensity

The rapid pace of development in western China has brought about inevitable concerns for environmental conditions and their management. The Sanjiangyuan National Park strives to address concerns for sustainable water resources management and biodiversity management, especially for the protection of endangered flora and fauna. In this study, a machine learning model (MaxEnt) was used to predict the human activity intensity and its effects on species in Sanjiangyuan protected by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). The model used human settlements as input and datasets such as terrain factors, climate, and artificial structures as environmental factors. The results showed that human activity intensity was significantly different between the East and the West. The area with the highest human activity intensity was Yushu County in the south area, and Xinghai-Zeku County in the east. By comparing the mammal richness with human activity intensity, we found human–wildlife coexistence in Sanjiangyuan. A detailed analysis on the CITES protected species showed that many important species, such as snow leopards, red pandas, and small Indian civets, occupied areas with high human activity intensity. The national park protects 3/4 CITES species with 1/3 in the area of the Sanjiangyuan region, owing to the relatively low human activity intensity.

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The role of helophyte species on nitrogen and phosphorus retention from wastewater treatment plant effluents

Journal of Environmental Management ◽

10.1016/j.jenvman.2019.109585 ◽

2019 ◽

Vol 252 ◽

pp. 109585 ◽

Cited By ~ 1

Author(s):

Esperança Gacia ◽

Susana Bernal ◽

Myrto Nikolakopoulou ◽

Ester Carreras ◽

Laura Morgado ◽

...

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

Phosphorus Retention ◽

Nitrogen And Phosphorus

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Stoichiometric imbalance in rates of nitrogen and phosphorus retention, storage, and recycling can perpetuate nitrogen deficiency in highly-productive reservoirs

Limnology and Oceanography ◽

10.4319/lo.2014.59.6.2203 ◽

2014 ◽

Vol 59 (6) ◽

pp. 2203-2216 ◽

Cited By ~ 34

Author(s):

Erin M. Grantz ◽

Brian E. Haggard ◽

J. Thad Scott

Keyword(s):

Nitrogen Deficiency ◽

Phosphorus Retention ◽

Nitrogen And Phosphorus

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Evaluation of Water Resources Security in the Karst Region from the “Man-Land-Water” Perspective: A Case Study of Guizhou Province

Water ◽

10.3390/w11020224 ◽

2019 ◽

Vol 11 (2) ◽

pp. 224 ◽

Cited By ~ 2

Author(s):

Qun-Wei Zheng ◽

Wei-Ci Su ◽

Feng-Tai Zhang ◽

Zi-Qin Zhou

Keyword(s):

Water Resources ◽

Human Activity ◽

Spatiotemporal Variation ◽

Evaluation Index System ◽

Guizhou Province ◽

Karst Region ◽

Security Evaluation ◽

Activity Intensity ◽

Comprehensive Index ◽

Geomorphological Features

This paper constructs a water resources security evaluation model from the “man (human activity intensity)-land (geological and geomorphological features)-water (water resources background conditions)” perspective, which accounts for the characteristics of hydrology and water resources in karst areas. A water resources security evaluation index system is established from three aspects (i.e., the background conditions of water resources, human activity intensity and geological and geomorphological features). The evaluation standard threshold is determined in accordance with relevant standards and domestic/foreign development experience. Both the comprehensive weights obtained by the Lagrange coefficient and the multi-objective fuzzy membership functions are used to comprehensively evaluate the spatial and temporal evolution of water resources security in Guizhou Province from 2001 to 2015. The results show that the water resources security comprehensive index of Guizhou Province was between 0.6 and 0.8 during this time (relatively safe type) and the safety was trending upwards. However, the comprehensive index of water resources security of each city in Guizhou Province demonstrates significant spatiotemporal variation. Whilst the comprehensive index was low in the Western part and high in the Eastern part of the province, it generally improved over time for the entire province. Moreover, the criteria layer indexes of water resources security in Guizhou Province and all cities also showed different degrees of variation and regional consistency across space and time. The interaction among these three aspects promoted the spatiotemporal variation of the Water Resources Security Comprehensive Index. In order to safeguard and improve water resources security, it is important to strengthen ecological and environmental management, promote the efficient use of water resources, establish sound management measures and security system related institutions and ensure water resources security.

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Wetland buffer zones for nitrogen and phosphorus retention: Impacts of soil type, hydrology and vegetation

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.138709 ◽

2020 ◽

Vol 727 ◽

pp. 138709 ◽

Cited By ~ 2

Author(s):

Craig R. Walton ◽

Dominik Zak ◽

Joachim Audet ◽

Rasmus Jes Petersen ◽

Jelena Lange ◽

...

Keyword(s):

Soil Type ◽

Phosphorus Retention ◽

Nitrogen And Phosphorus ◽

Buffer Zones

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Biogeochemical Cycles of Nitrogen and Phosphorus

Technologies for the Treatment and Recovery of Nutrients from Industrial Wastewater - Advances in Environmental Engineering and Green Technologies ◽

10.4018/978-1-5225-1037-6.ch001 ◽

2017 ◽

pp. 1-20

Author(s):

Andrea Fra-Vázquez ◽

Daniel Valenzuela-Heredia

Keyword(s):

Human Resource ◽

Human Activity ◽

Crucial Role ◽

Terrestrial Ecosystems ◽

Biogeochemical Cycles ◽

Global Scale ◽

Essential Elements ◽

Nitrogen And Phosphorus ◽

Limiting Nutrients ◽

Significant Attention

The study of biogeochemical cycles is important to understand the circulation of elements through aquatic, aerial and terrestrial ecosystems. Among others, N and P are considered as the limiting nutrients that determine the productivity of organisms. Since human activity is increasing its influence over these cycles at a global scale, it is important to analyze the implications of anthropogenic variations in order to detect the sources and try to prevent or reduce their impact. Moreover, not only the increasing or diminished concentration of nitrogen and phosphorus in nature by human resource exploitations is needed to account today. As metals play a crucial role in the dynamics of these essential elements, their presence in the environment also requires a significant attention.

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Functional Coupling Degree and Human Activity Intensity of Production–Living–Ecological Space in Underdeveloped Regions in China: Case Study of Guizhou Province

Land ◽

10.3390/land10010056 ◽

2021 ◽

Vol 10 (1) ◽

pp. 56

Author(s):

Xuesong Zhang ◽

Zijin Xu

Keyword(s):

Sustainable Development ◽

Human Activity ◽

Guizhou Province ◽

Moderate Intensity ◽

Functional Coupling ◽

Coordinated Development ◽

Activity Intensity ◽

Development Level ◽

Underdeveloped Areas ◽

Coordination Degree

(1) Background: Clarify the coordinated development level of production, living, and ecological spaces in the underdeveloped areas of China and their relationship with the intensity of human activity. Explore and address the problems that are likely to be faced when developing these areas and improve the quality of China’s new urbanization development. Promote the coordinated and sustainable development of the economy, society and ecology in underdeveloped areas. Guizhou Province is located in southwest China; the landform is broken and complex. Its economic development level is low. It is one of the representatives of underdeveloped areas in China. Therefore, Guizhou Province of China was selected as the study area. (2) Methods: This paper constructs the evaluation index system of the production–living–ecological space (PLES) functional system in China’s underdeveloped areas, and uses the coupling coordination degree model to measure the development coordination level of the study area. The human activity intensity model was used to calculate the human activity intensity in the study area. Response index is introduced to analyze the relationship between the spatial function coupling coordination degree and the intensity of human activities. (3) Results: Before 2015, the level of functional coupling coordination degree of production–living–ecological space (PLES) in the study area fluctuated, and after 2015, it showed a stable and coordinated development trend. The intensity of human activity continues to increase, and the interaction between human activity and local production–living–ecological space (PLES) function coupling coordination is intense. (4) Conclusions: human activity is a significant factor affecting regional, coordinated and sustainable development. In less developed areas, the impact of human activity is more obvious. Human activity, in combination with the theory of the human–land relationship and the moderate intensity of human activity, are important ways to improve the coordinated and sustainable development of underdeveloped regions.

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