Landscape Fragmentation in Qinling–Daba Mountains Nature Reserves and Its Influencing Factors

Climate change and intensified human activity have altered the landscape pattern of nature reserves and are expected to induce persistent changes in habitat quality. Using GIS technology and landscape ecological theories, we quantitatively analyzed landscape fragmentation characteristics and the driving factors for the interior and peripheries of the Qinling–Daba Mountains nature reserves during 2010–2017. Using spatial principal component analysis, landscape pattern indices, and Geodetector, we evaluated the habitat quality status of different nature reserve types in different regions and the impacts of human disturbance on these areas. The results are as follows: (1) Most national nature reserves in the Qinling–Daba Mountains were moderately or highly fragmented during 2010–2017, and the fragmentation degree of a few reserves exhibited a decreasing trend. (2) The fragmentation degree of landscape patches from the core areas to the experimental areas of the inner nature reserves showed a trend of being low in the middle and high in the surrounding area; the level of landscape fragmentation gradually decreased from the edge of 1 km (M-1) to 5 km (M-5). (3) There was spatial differentiation in the intensity of landscape fragmentation among the nature reserves; human activity intensity, land-use degree, elevation, slope gradient, and topographic relief were the factors influencing the spatial differentiation of landscape fragmentation, and the contribution of anthropogenic factors was significantly greater than that of natural factors. Human activities, such as the construction of network infrastructures, irrational partition management, expansion of agricultural and industrial production activities, were the main reasons for the spatial differentiation of landscape fragmentation in the nature reserves. These results can provide significant scientific support for ecological restoration in the nature reserves and contribute to the coordinated development between socio-economic system and ecological environment in the exceedingly impoverished areas.

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Study on the Landscape Pattern Change of Haikou City Based on GIS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.5394 ◽

2014 ◽

Vol 989-994 ◽

pp. 5394-5397

Author(s):

Feng Xia Wang ◽

Wei Hong Liu

Keyword(s):

Landscape Pattern ◽

Main Part ◽

Landscape Fragmentation ◽

Water Area ◽

Forest Land ◽

Gis Technology ◽

Balanced Development ◽

Remote Sensing Technique ◽

Unused Land ◽

Fragmentation Degree

The article is studying on the Haikou city, using Remote Sensing technique and GIS technology, with ArcGIS, ERDAS, FRAGSTAS, analyzing the temporal and spatial variation of landscape in Haikou City from 2000 to 2010, drawing the conclusion: residents, construction, farmland and forest land is the main part of landscape pattern and increased rapidly. Besides the decrease of unused land and water area, it also reflects that not only the landscape fragmentation degree of the integral sight in Haikou City in relatively high, but the landscape fragmentation degree of the residents, construction, farmland and forest land, which are the main part of Haikou City , is also relatively high.. Besides, the data also shows that each landscape didn’t connect well and the exchange of material energy among landscapes is not smoothly, which go against the mutual development between the landscape. However, the distribution of landscape in Haikou City is fairly balanced. There is no particularly advantaged type, which contributes to the balanced development of the landscape.

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The Dynamic Evaluation of Ecosystem Services Value (ESV) Based on the Analysis of the Landscape Pattern: A Case of Changshou District in Three Gorges Area

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.125 ◽

2012 ◽

Vol 518-523 ◽

pp. 125-131

Author(s):

Wu Ying Yi ◽

Wei Ci Su

Keyword(s):

Land Use ◽

Landscape Pattern ◽

Diversity Index ◽

Landscape Fragmentation ◽

Gis Technology ◽

Dry Land ◽

Wiener Diversity Index ◽

Fragmentation Index ◽

Unused Land ◽

Landscape Dynamic

Land use is the result of the interaction between the Nature and the Man; the change of land use not only affects landscape pattern changes, but also affects ESV. The paper is based on RS and GIS technology, taking Changshou district of Chongqing as an example. We select and calculate the Shannon-Wiener diversity index (SHDI), landscape fragmentation index (LTFI) and landscape dynamic index (K), to analyze the landscape pattern changes, and the theories of ESV is used in this paper. The results indicate: In 2002 and 2009, the total of patches increases. The area and the patches of forest land, brush, town and construction increase, while the area and the patches of the paddy, dry land, and the unused land reduce. SHDI and LTFI increase slightly. ESV ascends from 191million yuan to 197million yuan from 2002 to 2009, the net ascending value is 61million. The results show the ecological environment has improved a little in Changshou.

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Declining human activity intensity on alpine grasslands of the Tibetan Plateau

Journal of Environmental Management ◽

10.1016/j.jenvman.2021.113198 ◽

2021 ◽

Vol 296 ◽

pp. 113198

Author(s):

Meng Li ◽

Xianzhou Zhang ◽

Jianshuang Wu ◽

Qiannan Ding ◽

Ben Niu ◽

...

Keyword(s):

Tibetan Plateau ◽

Human Activity ◽

The Tibetan Plateau ◽

Alpine Grasslands ◽

Activity Intensity

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Hydrological changes in the Rzecin peatland (Puszcza Notecka, Poland) induced by anthropogenic factors: Implications for mire development and carbon sequestration

The Holocene ◽

10.1177/0959683616670468 ◽

2016 ◽

Vol 27 (5) ◽

pp. 651-664 ◽

Cited By ~ 11

Author(s):

Krystyna Milecka ◽

Grzegorz Kowalewski ◽

Barbara Fiałkiewicz-Kozieł ◽

Mariusz Gałka ◽

Mariusz Lamentowicz ◽

...

Keyword(s):

Carbon Sequestration ◽

Plant Communities ◽

Human Activity ◽

Accumulation Rate ◽

Carbon Accumulation ◽

Anthropogenic Factors ◽

Poor Fen ◽

History Of ◽

Carbon Accumulation Rates

Wetlands are very vulnerable ecosystems and sensitive to changes in the ground water table. For the last few thousand years, hydrological balance has also been influenced by human activity. To improve their cropping features, drainage activity and fertilizing were applied. The drainage process led to an abrupt change of environment, the replacement of plant communities and the entire ecosystem. The problem of carbon sequestration is very important nowadays. A higher accumulation rate is related to higher carbon accumulation, but the intensity of carbon sequestration depends on the type of mire, habitat, and climatic zone. The main aim of this article was an examination of the changes in poor-fen ecosystem during the last 200 years in relation to natural and anthropogenic factors, using paleoecological methods (pollen and macrofossils). The second aim was a detailed investigation of the sedimentary record to aid our understanding of carbon sequestration in the poor fen of temperate zone. This case study shows that fens in temperate zones, in comparison with boreal ones, show higher carbon accumulation rates which have been especially intensive over the last few decades. To reconstruct vegetation changes, detailed palynological and macrofossil analyses were done. A 200-year history of the mire revealed that it was influenced by human activity to much degree. However, despite the nearby settlement and building of the drainage ditch, the precious species and plant communities still occur.

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Analysis of Ecological Landscape Pattern Change in the Poyang Lake Eco-Economic Zone of China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.864-867.2639 ◽

2013 ◽

Vol 864-867 ◽

pp. 2639-2644

Author(s):

Gui Ying Liu ◽

Peng Wang ◽

Hua Lin Xie

Keyword(s):

Landscape Pattern ◽

Pattern Analysis ◽

Poyang Lake ◽

Gis Technology ◽

Aggregation Index ◽

Landscape Pattern Analysis ◽

Rs And Gis ◽

Economic Zone ◽

Ecological Landscape ◽

Degree Of Fragmentation

In this paper, based on RS and GIS technology and landscape pattern analysis, the changes of ecological landscape in the Poyang Lake Eco-economic Zone were analyzed from 1990 to 2005. Main results are as follows. There was a decreasing trend of wetland and forest from 1990 to 2005. The result of landscape pattern analysis showed that there was an increase in the degree of fragmentation of ecological landscape in the study area. The increased Perimeter-area fractal dimension indicated the shape of ecological landscape became more and more rules. Aggregation Index (AI) of lake increased from 86.0066 in 1990 to 86.123 in 2005, which showed that the overall aggregation degree of ecological landscape in the Poyang Lake Eco-economic Zone is in rise.

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