Effects of urbanization intensity on forest structural-taxonomic attributes, landscape patterns and their associations in Changchun, Northeast China: Implications for urban green infrastructure planning

Zhang, Dan; Wang, Wenjie; Zheng, Haifeng; Ren, Zhibin; Zhai, Chang; Tang, Zuohua; Shen, Guobin; He, Xingyuan

doi:10.1016/j.ecolind.2017.05.042

Cited by 52 publications

(41 citation statements)

References 58 publications

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“…Our results showed that the correlation relationship between aboveground carbon storage and landscape metrics varied dramatically with different urbanization intensity. This study revealed that in high urbanization intensity, aboveground carbon storage was positively correlated with vegetation cover proportion, land cover diversity and negatively correlated with the aggregation degree of green space patches, which corroborates the previous findings (Godwin et al, ; Zhang et al, ). The reason why aggregated green space patches showed high carbon storage capacity might be related to the less edge effects on vegetation structure, which has been found in natural forest ecosystems (Harper et al, ).…”

Section: Discussionsupporting

confidence: 92%

“…Figure d shows that when the urbanization intensity (impervious surface proportion) increases to 60%, there was much less difference of carbon density among green space patches, and thus we suggest that the potential of carbon storage increase could be very limited when the urban development reaches certain intensity threshold. While Zhang et al () highlighted the important role of landscape planning in urban forest management especially in heavy urbanization areas, our results emphasized the marginal effects of those landscape planning in increasing carbon storage services.…”

Section: Discussioncontrasting

confidence: 74%

“…Frequent interaction between humans and land covers in cities might create smaller or more segregated urban green space patches that are embedded in heavily urbanized areas (Botzat, Fischer, & Kowarik, 2016;Qian, Zhou, Yu, & Pickett, 2015). Also, landscape metrics as quantitative indices indicating the spatial heterogeneity of green space patches could facilitate the analysis of land cover change effects through linking landscape patterns with ecological functions (Qian et al, 2015;Ren et al, 2013;Zhang et al, 2017). In the first 30 years of the 21st century, fast urban land cover increase is forecasted to mainly take place in cities of developing countries (Seto, Guneralp, & Hutyra, 2012).…”

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confidence: 99%

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Valuing urban green spaces in mitigating climate change: A city‐wide estimate of aboveground carbon stored in urban green spaces of China's Capital

Sun

Xie

Zhao

2019

Global Change Biology

104

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Urban green spaces provide manifold environmental benefits and promote human well‐being. Unfortunately, these services are largely undervalued, and the potential of urban areas themselves to mitigate future climate change has received little attention. In this study, we quantified and mapped city‐wide aboveground carbon storage of urban green spaces in China's capital, Beijing, using field survey data of diameter at breast height (DBH) and tree height from 326 field survey plots, combined with satellite‐derived vegetation index at a fine resolution of 6 m. We estimated the total amount of carbon stored in the urban green spaces to be 956.3 Gg (1 Gg = 109 g) in 2014. There existed great spatial heterogeneity in vegetation carbon density varying from 0 to 68.1 Mg C ha‐1, with an average density of 7.8 Mg C ha−1. As expected, carbon density tended to decrease with urban development intensity (UDI). Likely being affected by vegetation cover proportion and configuration of green space patches, large differences were presented between the 95th and 5th quantile carbon density for each UDI bin, showing great potential for carbon sequestration. However, the interquartile range of carbon density narrowed drastically when UDI reached 60%, signifying a threshold for greatly reduced carbon sequestration potentials for higher UDI. These findings suggested that urban green spaces have great potential to make contribution to mitigating against future climate change if we plan and design urban green spaces following the trajectory of high carbon density, but we should be aware that such potential will be very limited when the urban development reaches certain intensity threshold.

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Section: Discussionsupporting

confidence: 92%

Section: Discussioncontrasting

confidence: 74%

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confidence: 99%

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Valuing urban green spaces in mitigating climate change: A city‐wide estimate of aboveground carbon stored in urban green spaces of China's Capital

Sun

Xie

Zhao

2019

Global Change Biology

104

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“…Tree DBH and the height of trees, shrubs and herbs were calculated using the formulas outlined below (5 and 6). Tree and shrub density are referred to in Formula (7), and shrub and herb coverage are referred to in Formula (8).…”

Section: Structural Traits Calculationmentioning

confidence: 99%

“…For a specific region, more detailed investigations will most likely yield more reliable results at the expense of more funds and more labor forces. Parameters used by most scholars to quantitatively represent characteristics of forest structure and species diversity includes species abundance, Simpson index and Shannon-Wiener index, the richness index, the Pielou evenness index and community traits such as tree diameter, height and stem density [6][7][8][9]. Data recorded at different vertical layers of trees, shrubs and herbs could benefit a holistic view of the forest characteristics.…”

Section: Introductionmentioning

confidence: 99%

Dominant Species Abundance, Vertical Structure and Plant Diversity Response to Nature Forest Protection in Northeastern China: Conservation Effects and Implications

Wang

et al. 2020

Forests

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The conservation of species diversity and improvement of forest structure are essential roles of the Natural Reserve Policy and the Natural Forest Protection Program (NFPP) in China. However, the long-term effects of NFPP are still not well-defined, and a natural reserve (Liangshui) and surrounding region were surveyed as a proxy of NFPP for approaching the protection effects. Our results showed that long-term conservation significantly altered the dominant species in the herb layer (80% of species), followed by shrub (58%) and tree layers (50%); there was a 1.6-8.0-fold increase in abundance in Corylus shrubs, Acer trees and Carex grass, but a 1.3-10.0-fold abundance decrease in larch trees, Athyrium herbs and Lonicera shrubs. In contrast, tree species diversity and distribution evenness increased by 31% and 23.4% in the reserve, respectively. Forest protection in the reserve also led to the forest structural alteration with the observation of larger-sized trees and shorter herbs, but relatively sparse forests (smaller tree density). Structural equation modeling manifested that the reserve directly altered forest structure, at a coefficient of 0.854, nearly two-fold higher than its impact on diversity (0.459) and dominant species (−0.445). The most affected parameters were plant size (trees and herbs) and tree density related to forest structure, tree diversity, herb richness and evenness for diversity traits, and Oxalidaceae and Rosaceae for dominant species. This study provides basic data that can be used to evaluate the impact of the nature reserve in NE China, and these findings can be used to guide the implementation of NFPP in the long-term in the future.

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Regulation simulation of land‐use ecological security, based on a CA model and GIS: A case‐study in Xingguo County, China

2022

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Ecological land is constantly modified by agriculture and construction, which leads to soil erosion, land degradation, soil pollution flood disasters, and many other land ecological security problems, threatening sustainable development. Few studies have been made to construct a land‐use ecological security pattern (LUESP) aimed at achieving urban expansion, food security, and ecological security from the perspective of land‐use needs. This study seeks to provide decision makers with the choice of multi‐scenario LUESPs by simulating the LUESP under different scenarios, offering a reasonable land‐use ecological security regulation strategy. In this paper, the ecological security evaluation method was used to identify key ecological space of a study area and the scenario analysis method was used to set up three security scenarios: ideal security (IS) scenario, satisfactory security (SS) scenario, and bottom‐line security (BS) scenario, thereby constructing the constrained cellular automata (CA) model of the LUESP and simulating the LUESPs under three security scenarios for Xingguo County, China. The results showed that the LUESP construction land index and arable land index did not exceed the total amount of the General Plan of Land Use in Xingguo County under the three security scenarios. Moreover, both key ecological space loss and landscape fragmentation degree were greatly reduced, the ecological patches tend to cluster, and the anti‐jamming ability of the landscape pattern was enhanced. The ranking of LUESPs under three security scenarios was as follows: BS scenario > SS scenario > IS scenario. These results implied that the LUESPs met the demand for land in Xingguo County for ecological security, food security, and economic development, while space occupied is different under three security scenarios. The decision makers can adopt appropriate land‐use ecological security regulation strategies according to the future development plans of the region.

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Effects of urbanization intensity on forest structural-taxonomic attributes, landscape patterns and their associations in Changchun, Northeast China: Implications for urban green infrastructure planning

Cited by 52 publications

References 58 publications

Valuing urban green spaces in mitigating climate change: A city‐wide estimate of aboveground carbon stored in urban green spaces of China's Capital

Valuing urban green spaces in mitigating climate change: A city‐wide estimate of aboveground carbon stored in urban green spaces of China's Capital

Dominant Species Abundance, Vertical Structure and Plant Diversity Response to Nature Forest Protection in Northeastern China: Conservation Effects and Implications

Regulation simulation of land‐use ecological security, based on a CA model and GIS: A case‐study in Xingguo County, China

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