Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture

Tian, Jin; Xiong, Jie; Zhang, Yichi; Cheng, Weiming; He, Yan; Ye, Chongchong; He, Weiyi

doi:10.5814/j.issn.1674-764x.2021.06.003

Cited by 9 publications

(5 citation statements)

References 43 publications

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“…On the spatial aspect, NPP showed a divergence pattern of south-high and north-low, and the grassland NPP in Yan'an was markedly higher than that in Yulin, which was consistent with the results explored by Xindong et al [50]. More than 99% of the grassland NPP was increasing, but the variable tendency was not significant [27,51]. The rate of change of NPP of all three types of grassland displayed a south-high and north-low pattern, with those distributed in Yan'an City being higher than those in Yulin City.…”

Section: Impact Of Climate Change and Anthropogenic Influence On Gras...supporting

confidence: 88%

“…They also assessed human activities' impact on grasslands. This methodology was adopted by Feng et al [26] and Tian et al [27]. The Carnegie-Ames-Stanford Approach (CASA) model, derived from absorbed photosynthetically active radiation (APAR) and light energy efficiency, has been commonly used to calculate NPP regionally and globally [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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Spatial–Temporal Dynamics of Grassland Net Primary Productivity and Its Driving Mechanisms in Northern Shaanxi, China

Chen,

Lin,

Chen

et al. 2023

Agronomy

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Grasslands, a vital ecosystem and component of the global carbon cycle, play a significant role in evaluating ecosystem health and monitoring the global carbon balance. In this study, based on the Carnegie–Ames–Stanford Approach (CASA) model, we estimated the Net Primary Productivity (NPP) of grasslands in northern Shaanxi from 2000 to 2020. Employing trend analysis, stability analysis, multiple regression analysis, and residual analysis, the research examined the dynamic changes of grassland NPP and its response to climatic and human factors. Key findings include: (1) Grassland NPP showed a significant increasing trend during 2000–2020, with high-coverage grasslands showing a higher rate of increase than medium and low-coverage grasslands. (2) Most grasslands (>90%) exhibited unstable growth and high NPP fluctuation. (3) While temperature, precipitation, and radiation undulate, the trends were not significant. Rainfall and radiation emerged as dominant factors affecting NPP, with temperature suppressing NPP increase to some extent. (4) Policies like returning farmland to grassland had a positive impact on grassland recovery, vegetation productivity, and regional ecosystem health.

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Section: Impact Of Climate Change and Anthropogenic Influence On Gras...supporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Spatial–Temporal Dynamics of Grassland Net Primary Productivity and Its Driving Mechanisms in Northern Shaanxi, China

Chen,

Lin,

Chen

et al. 2023

Agronomy

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“…One possible reason for these results could be higher temperatures that cause water to evaporate faster [46], thus increasing relative humidity. In general, climate factors have a consistent impact on carbon sequestration in ecological spaces at different spatial scales [47]. More than rainfall, evapotranspiration and relative humidity at the scale of urban agglomerations can reflect the combined effects of both temperature and the water environment [48].…”

Section: Comparative Analysis Of Resultsmentioning

confidence: 99%

Impact of Climate on the Carbon Sink Capacity of Ecological Spaces: A Case Study from the Beijing–Tianjin–Hebei Urban Agglomeration

Wang,

Zhang

et al. 2023

Land

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Climate plays a significant role in shaping ecosystem-level carbon sinks. Research on the mechanisms of climate impacts on carbon sinks can contribute to the achievement of carbon neutrality. Investigating the mechanisms by which climate impact on carbon sinks in ecological spaces in the Beijing–Tianjin–Hebei region, one of the most important urban clusters in China, is of great significance. This study employed spatial autocorrelation and econometric models to explore how various climatic factors impact net primary productivity (which is used to represent carbon sink capacity) on a spatial scale. We found an increasing trend in NPP across the Beijing–Tianjin–Hebei urban agglomeration from 2000 to 2020, with marked spatial clustering. Climatic factors exhibited the best fit with the spatial Durbin model, except for average annual precipitation. The remaining factors had significant effects on NPP, showing spatial spillover effects. Results also showed that the average annual temperature, evaporation, and relative humidity had positive impacts on NPP at a local scale but adverse effects at a regional scale. Average annual sunshine duration and the ground temperature had negative effects on NPP locally but promoted effects regionally. Furthermore, the average annual wind speed negatively impacted both local- and regional-scale NPP. This research provides insights into how climate affects carbon sinks on a small spatial scale, offering important references for making policy decisions and improving the accuracy of carbon cycling simulations.

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“…The government should take the water consumption of 10 000 yuan (RMB) GDP as an important assessment index and promote the transfer of water resources to high-efficiency and high-water-saving industries by adjusting the water use structure of the three industries as well as each industry within the sector. In particular, the agricultural sector, which is the largest water user in counties (Tian et al, 2021), needs to reasonably adjust the crop cultivation structure in each county while promoting drought-resistant fine varieties to address the problem of agricultural water consumption exceeding control targets in most counties. In the industrial sector, industries that consume a lot of water, such as metal and non-metal mining and selection, textile and paper printing, are curbed, and the extension of industrial chains and the development of industries that consume less water, such as deep processing of oil and gas resources and clean energy equipment manufacturing, are encouraged.…”

Section: Sustainability Strategymentioning

confidence: 99%

Dynamic Assessment and Sustainability Strategies of Ecological Security in the Irtysh River Basin of Xinjiang, China

et al. 2023

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The drylands of China are extensive, and they are home to more than one-third of the country's population. However, the watershed territories of the drylands, where the majority of human activities are concentrated have long experienced strained human-land relationships, culminating in ecological security concerns. Correspondingly, it is essential to carry out a comprehensive assessment of the ecological security of dryland watersheds and to identify the key factors influencing ecological security in order to formulate strategies that ensure the sustainability of drylands. Premised on the Driving-Pressure-State-Impact-Response (DPSIR) model, this study developed an ecological security index and applied it to the Irtysh River Basin of Xinjiang, China, from 2000 to 2020. The obstacle degree model was applied to reveal the obstacles in two dimensions: criterion level and indicator level. The findings suggested that the ecological security comprehensive index in the Irtysh River Basin has increased significantly from 2000 to 2020, irrespective of the fact that it decreased during the study period and then increased. The ecological security level changed from 'critically safe' in 2000 to 'general safety' in 2020, with the state subsystem and pressure subsystem becoming ecological security weaknesses. The primary factors influencing the ecological security of the study area were water consumption, the area of high-efficiency water-saving irrigation, the proportion of wetland area, vegetation coverage, and livestock population. The ecological security of different counties in the basin varies greatly, whereas the factors that influence ecological security showed both similarities and differences among the counties. In light of on the findings, we proposed that future strategies for ecological security enhancement should concentrate on enacting the policy of localizing spatial differentiation, optimizing industrial structure, strengthening scientific and technological support in the field of water conservation, bolstering the treatment capacity of environmental facilities, and implementing the Mountains-Rivers-Forests-Farmlands-Lakes-Grasslands System to support the sustainable development of dryland watersheds.

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Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 9 publications

References 43 publications

Spatial–Temporal Dynamics of Grassland Net Primary Productivity and Its Driving Mechanisms in Northern Shaanxi, China

Spatial–Temporal Dynamics of Grassland Net Primary Productivity and Its Driving Mechanisms in Northern Shaanxi, China

Impact of Climate on the Carbon Sink Capacity of Ecological Spaces: A Case Study from the Beijing–Tianjin–Hebei Urban Agglomeration

Dynamic Assessment and Sustainability Strategies of Ecological Security in the Irtysh River Basin of Xinjiang, China

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