长沙都市区生境质量对城市扩张的时空响应

戴云哲,; Yunzhe, DAI; 李江风,; 杨建新,; Li, Jiangfeng; Jianxin, YANG

doi:10.18306/dlkxjz.2018.10.004

Cited by 3 publications

(1 citation statement)

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“…The potential range of a threat describes how far away from its source a threat can cause disturbance. The manner in which the impact of the threat lessens as one moves away from the source can be classified as linear or exponential [30,57,59]. The level of threat referred to the number of threatened species in an area divided by the total number of species in that same area [13].…”

Section: Characteristicsmentioning

confidence: 99%

Define–Investigate–Estimate–Map (DIEM) Framework for Modeling Habitat Threats

et al. 2021

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As the human population increases, the landscape is altered to provide housing, food, and industry. Human activity poses a risk to the health of natural habitats that, in turn, affect biodiversity. Biodiversity is necessary for a functioning ecosystem, as species work synergistically to create a livable environment. It is, therefore, important to know how human practices and natural events threaten these habitats and the species living in them. A universal method of modeling habitat threats does not exist. This paper details the use of a literature review to formulate a new framework called Define–Investigate–Estimate–Map (DIEM). This framework is a process of defining threats, investigating an area to discover what threats are present, estimating the severity of those threats, and mapping the threats. Analysis of 62 studies was conducted to determine how different authors define and characterize threats in various contexts. The results of this analysis were then applied to a case study to evaluate the Choctawhatchee River and Bay Watershed. Results suggest that the most abundant threat in the watershed is agricultural development, and the most destructive threat is urban development. These two threats have the greatest impact on the total threat level of the watershed. Applying the DIEM framework demonstrates its helpfulness in regional analysis, watershed modeling, and land development planning.

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Section: Characteristicsmentioning

confidence: 99%

Define–Investigate–Estimate–Map (DIEM) Framework for Modeling Habitat Threats

et al. 2021

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Changes and protections of urban habitat quality in Shanghai of China

Xie

Zhang

Shi

et al. 2023

Sci Rep

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Habitat quality has been widely used as an important indicator in the evaluation of regional ecological security and ecosystem services. Previous studies have focused on the influences of urbanization on habitat quality, but the protection measures about how to respond to the dynamic changes of habitat quality patterns are still unclear. This study investigated the habitat quality in the metropolitan region of China (Shanghai) by using InVEST model, and analyzed its dynamic changes from 2000 to 2017 for the sake of providing different protection objects and measures for Shanghai. The results showed that the habitat quality index (HQI) in 2017 was 0.42, and the accumulated area percentages of less than 0.4 in HQI reached 46%, whereas the habitat quality in Chongming district was the highest. The HQI and habitat protected index (HPI) showed an obvious decline tendency from suburban area to downtown area. The HQI in Shanghai gradually declined from 0.56 in 2000 to 0.42 in 2017, and the deterioration area in habitat quality nearly covered 33% between 2000 and 2017. Additionally, the area proportion of the median habitat quality (0.4 < HQI ≤ 0.6) drastically dropped, but the areas of the low (HQI ≤ 0.2) and the high (HQI > 0.8) in habitat simultaneously expanded. Therefore, the valuable habitat in the western and southern coastal wetlands, Dianshan lake and Chongming district in Shanghai should be strictly protected, which covered 30% of the metropolitan area in Shanghai, and about 17% of the region located in the inner coastal zones and northern of Chongming Island was in urgent need of habitat restoration. Our results provide vital references for the maintenance and sustainable management of urban habitats in the metropolitan region.

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Comparing Methods for Estimating Habitat Suitability

Muhammed

Anandhi

Chen

2022

Land

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Habitat suitability (HS) describes the ability of the habitat to support living organisms. There are several approaches to estimate habitat suitability. These approaches are specific to a species or habitat or estimate general HS broadly across multiple species or habitats. The objectives of the study were to compare the approaches for estimating HS and to provide guidelines for choosing an appropriate HS method for conservation. Three HS estimation methods were used. Method 1 scores the suitability based on the naturality of the habitat. Method 2 uses the average of HS values found in the literature. Method 3 uses the species richness as an indicator for HS. The methods were applied to a case study in the Choctawhatchee River Watershed. GIS applications were used to model the suitability of the watershed. The advantages and disadvantages of the HS methods were then summarized. The multiple HS maps created using the three methods display the suitability of the watershed. The highest suitability occurred in the southern parts of the region. Finally, a decision support tool was developed to help determine which approach to select based on the available data and research goals.

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长沙都市区生境质量对城市扩张的时空响应

Cited by 3 publications

References 0 publications

Define–Investigate–Estimate–Map (DIEM) Framework for Modeling Habitat Threats

Define–Investigate–Estimate–Map (DIEM) Framework for Modeling Habitat Threats

Changes and protections of urban habitat quality in Shanghai of China

Comparing Methods for Estimating Habitat Suitability

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