Ecological landscape pattern changes and security from 1990 to 2021 in Ebinur Lake Wetland Reserve, China

Sun, Qian; Sun, Jun; Baidurela, Aliya; Li, Liu; Hu, Xinyue; Song, Tingwei

doi:10.1016/j.ecolind.2022.109648

Cited by 23 publications

(19 citation statements)

References 53 publications

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“…Landscape indices include a patch level index, a patch type level index and a landscape level index. As a scale of landscape pattern characteristics, the landscape index has been widely used to analyze regional landscape patterns and dynamic evolution [19,20], including urban [21], rural [22], urban fringe areas [23] and economically developed areas [24]. However, the landscape pattern evolution of two different geographical units of "mountain" and "flatland" in the generalized mountain landscape is rarely involved.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Temporal-Spatial Variation on Mountain-Flatland Landscape Pattern in Karst Mountainous Areas of Southwest China: A Case Study of Yuxi City

Zhou

Xie

2023

Land

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Taking Yuxi City, a typical mountain-flatland in the southwestern karst mountainous area, as an example, we used six remote sensing images from 1995 to 2018 as the main data sources, and the grid scale was used to calculate the landscape pattern index in order to analyze the temporal-spatial evolution characteristics of the landscape pattern. The results are shown as follows: (1) At the class level, most landscape indices and fragmentation degrees of landscape units in the flatland area are significantly higher than those in the mountainous area. The layout of construction land and cultivated land is also more concentrated than that in the mountainous area, but the central tendency of forest and grass in the mountainous area is more eye-catching. (2) At the landscape level, although the landscape diversity index and landscape shape index of both the mountainous areas and the flatland areas decrease in the low-value area and increase in the high-value area, the proportion of high-value areas in the flatland area is noticeably greater. The proportion of the high-value areas of the largest patch index in the mountainous area is significantly greater, and in the flatland area, the low-value area continues to expand while the middle and high value areas continue to shrink. (3) The landscape shape of the flatland area is becoming more complex, and the landscape units in the mountainous area tend to be single. The natural landscape of forest and grass in the mountainous area continues to expand and tends to be contiguous, while the man-made landscape in the flatland area continually increases and shows fragmentation, reflecting the pattern characteristics formed by the coupling evolution of land use between two regions. The urban expansion and the increase in the construction land in the flatland area are mutually causal with the decrease in cultivated land and the increase in forest and grass in the mountainous area.

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Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Temporal-Spatial Variation on Mountain-Flatland Landscape Pattern in Karst Mountainous Areas of Southwest China: A Case Study of Yuxi City

Zhou

Xie

2023

Land

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“…Wetland evaluation in China began in the late 1990s and has developed rapidly in recent years. It mainly includes wetland ecological security evaluation (Namaalwa, Van Dam et al 2013, Sun, Sun et al 2022, wetland ecological health evaluation (Chen, Cao et al 2019, Zaka, Aqeel et al 2023, ecological integrity evaluation (Zhang, Fan et al 2023), wetland ecological risk evaluation (Jiang, Lv et al 2017, Fu, Liu et al 2020, Duan, Yu et al 2022, wetland ecosystem quality (Jing, Zhang et al 2020, Zhu, Yang et al 2023, and wetland ecological function/value (Zhang, Yushanjiang et al 2019). Domestic and foreign scholars have carried out ecological security research on different wetlands.…”

Section: Introductionmentioning

confidence: 99%

“…That is, the Momoge wetlands are at the low level of safety (Zhang, Zang et al 2023). Sun et al (2022) used the Landsat TM/OLI data in 1990,1998,2011 and 2021 to study the Ebinur Lake Wetland Reserve in China. The results demonstrated that the overall ecological security index of the wetland increased gradually from 0.56 to 0.65 in the past 32 years, and the unsafe area first decreased and then increased slightly.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, owing to the rapid growth of the local population and the dependence and unreasonable utilization of wetland resources, the wetland ecosystem has been disturbed by human activities, such as drainage and reclamation, overgrazing, and infrastructure construction, and the influence of climatic factors such as precipitation and temperature. The structure and function of the wetland ecosystem are greatly threatened (Sun, Sun et al 2022).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of plateau wetland ecological security and its influencing factors in multi-climatic zones: A case study of Yunnan Province

Chen,

Zhang,

Chen

2023

Preprint

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Plateau wetlands play an important role in social and economic development and ecological security. The ecological environment of a plateau wetland is fragile and vulnerable to external interference, resulting in changes in the wetland structure and ecological functions. Ecological security assessment of plateau wetlands is the key to fully understanding their ecological security situation. Yunnan Province, which is located in the Qinghai-Tibet Plateau, has a significant stereoscopic climate, which is characterized by distinct features of diverse and complex wetlands. Thus, studying the wetland ecological security of Yunnan Province spanning various climatic zones is of great significance. In this study, an improved pressure-state-response model was constructed, and an index system containing state and social pressure was established using remote sensing data, Yunnan Province Yearbook data, and socioeconomic statistical data. Taking 16 prefectures in Yunnan Province as samples, this study weighted the evaluation indices via the combination of entropy weighting and expert weighting. In addition, the wetland ecological security state in Yunnan Province in 2017 was evaluated using the fuzzy matter-element method, and the influencing factors were analyzed. Results showed that the highest ecological security index of wetland was distributed in Nujiang, Diqing in the northwest of Yunnan Province and Xishuangbanna in the south, whereas the lowest area was in Qujing, Zhaotong in the northeast of Yunnan Province and Baoshan in the west. Differences were observed in the influencing factors of wetland ecological security in different prefectures. In general, the influencing factors in Yunnan Province were the annual average temperature, proportion of natural wetland, percentage of secondary industry, annual precipitation, wetland ecological service function per unit acreage, fertilization intensity, and industrial water recycling rate. The results of grey correlation analysis showed that climatic factors and human disturbance activities were the main influencing factors of wetland ecological security in Yunnan Province, and the influence rate of the two was close to each other. The findings of this work could provide suggestions for the decision making on ecological security development in plateau wetlands across multi-climate zones, as well as data support for the ecological protection of plateau wetlands.

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“…LEI is assessed by climate change velocity, with higher velocity suggesting greater exposure: LEI = velocity pre + |velocity tem | . plex, discontinuous and heterogeneous(Sun et al 2022). Thus, the disturbance is typically quantified using landscape fragmentation, dispersion, and dominance metrics that condense the information on these landscape variations(Nematollahi et al 2022).…”

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confidence: 99%

Landscape vulnerability assessment driven by drought and precipitation anomalies in sub-Saharan Africa

Guo

Zhang

et al. 2023

Environ. Res. Lett.

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Global climate extremes are increasingly frequent and intense, especially in Africa, which is most vulnerable to climate change (de Sherbinin, 2013). However, the vulnerability of the landscapes composed of diverse ecosystems to climate extremes is far from being clearly understood. This study constructed a set of index systems based on the “exposure-sensitivity-adaptive capacity” framework to assess landscape vulnerability driven by abnormal drought and precipitation in sub-Saharan Africa. In addition, correlation analysis was used to discover factors affecting landscape vulnerability. The results showed that a high level of landscape vulnerability was determined by high exposure and high sensitivity, as adaptive capacity exhibited little difference. The drought and wet events occurred in 80.9% and 51.3% of the climate change-dominated areas during 2001-2020, respectively. In areas where drought anomalies occur, about 8% of the landscapes, primarily formed by sparse vegetation and grasslands, were susceptible to drought. Moreover, in areas with abnormal precipitation, high vulnerability occurred only in about 0.6% of landscapes mostly covered by grasslands and shrubs. In addition, the intensity of landscape vulnerability driven by drought was higher than that driven by precipitation anomalies in the areas that experienced both dry and wet anomalies. Furthermore, the greater the deviation of landscape richness, diversity, and evenness from the normal climate state, the stronger the landscape vulnerability. The results add new evidence for landscape instabilities - an obvious contrast driven by drought and wetness - from the perspective of landscape vulnerability. The methodology of assessing landscape vulnerability established in this study can provide a new way to guide the regulation of landscape composition in response to frequent climate extremes on a macro level.

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Ecological landscape pattern changes and security from 1990 to 2021 in Ebinur Lake Wetland Reserve, China

Cited by 23 publications

References 53 publications

Comparative Analysis of Temporal-Spatial Variation on Mountain-Flatland Landscape Pattern in Karst Mountainous Areas of Southwest China: A Case Study of Yuxi City

Comparative Analysis of Temporal-Spatial Variation on Mountain-Flatland Landscape Pattern in Karst Mountainous Areas of Southwest China: A Case Study of Yuxi City

Evaluation of plateau wetland ecological security and its influencing factors in multi-climatic zones: A case study of Yunnan Province

Landscape vulnerability assessment driven by drought and precipitation anomalies in sub-Saharan Africa

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