scholarly journals Changes of Land Use/Cover and Landscape in Zhalong Wetland as “Red-Crowned Cranes Country”, Heilongjiang Province, China

2020 ◽  
Keyword(s):  
Land Use ◽  
Landscape Pattern ◽  
Human Activities ◽  
Remote Sensing Data ◽  
Climate Trend ◽  
Zhalong Wetland ◽  
Unused Land ◽  
Landsat Satellite ◽  
Landscape Patch

<p>Hydrological and ecological role of wetlands were growing significant. Based on Landsat satellite remote sensing data collected in the years of 1990, 2000 and 2014, and integrating GIS with analytical methods of landscape ecology, research on changes of land use/cover and landscape pattern of Zhalong Wetland from 1990 to 2014 was conducted. Then, we analysed the effect of human activities and climate changes on land use/cover. The main conclusions were as follows: (1) Significant changes in land use/cover have taken place in Zhalong wetland during 1990-2014.Cultivated land, unused land and construction land increased continually, while the area of reed swamp, water swamp, grass land and water land decreased accordingly; (2) Landscape patch shape has be increasingly irregular and turned complexed, there was the tend of the growing diversification and homogenization of land use change and the growing complicate landscape pattern in Zhalong wetland; (3) There was a warm-dry climate trend from 1958 to 2014; (4) Human activities including population, construction, water land pollution and production have been threatening the wetland ecosystem. Those changes in Zhalong area were caused by nature and human activity. However, the human’s contributions are great.</p>

Landscape Pattern Analysis of Land Use in Low Mount Hilly Land of Harbin Eastern Suburb

2014 ◽  
Vol 641-642 ◽  
pp. 514-518
Author(s):  
Hai Hong Song ◽  
Yun Feng Tan
Keyword(s):  
Land Use ◽  
Landscape Pattern ◽  
Human Activities ◽  
Pattern Analysis ◽  
Landscape Index ◽  
Patch Type ◽  
Landscape Pattern Analysis ◽  
Patch Shape ◽  
Patch Connectivity ◽  
Landscape Patch

This article analyzes the general characteristics and its causes of the landscape pattern of land use, taking the Tuanjie town of DaoWai district in Harbin as an example. Using GIS and Fragstats software to calculate a series of landscape index, the data show that Tuanjie town is given priority to with agriculture landscape, and the landscape patch connectivity is stronger; the overall landscape patch shape is complex, showing the human activities interfere significantly; and each patch type concentration and fragmentation is quite different. Therefore, based on the use of their own advantages, put forward reasonable suggestions to the landscape optimization of Tuanjie town land use.

scholarly journals Spatial Differentiation of Land Use and Landscape Pattern Changes in the Beijing–Tianjin–Hebei Area

2020 ◽  
Vol 12 (7) ◽  
pp. 3040 ◽  
Author(s):  
Yafei Wang ◽  
Xiaoli Zhao ◽  
Lijun Zuo ◽  
Zengxiang Zhang ◽  
Xiao Wang ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Landscape Pattern ◽  
Spatial Differentiation ◽  
Remote Sensing Data ◽  
Protection Measures ◽  
Construction Land ◽  
Landscape Type ◽  
Urban Construction ◽  
Long Time

Landscape pattern analysis based on geometric features effectively reflects the spatial patterns of land use. Based on the administrative boundaries of prefecture-level cities, the Beijing–Tianjin–Hebei collaborative development area is divided into three sub-regions, according to ecological–production–living functions. We used remote sensing data of long time series land-use change from late 1980 to 2015, and analyzed landscape pattern changes and spatial differentiation in the past 30 years. The results show that: (1) The main type of land-use change was the flow of cultivated land to urban construction land, and the urbanization process was significant. (2) The urban construction land was the landscape type with the highest degree of fragmentation and maximum land-use change in the region. (3) The patch density in the Beijing–Tianjin–Hebei area increased while the average patch area decreased, and the entire landscape tended towards significant fragmentation. The Shannon diversity and evenness indexes continued to increase, indicating that the overall landscape in this region is heterogeneous and diversified. The ecological and environmental protection measures implemented in this region so far have achieved results, but require more stringent measures to ensure the total diversification of land use in the region.

The Water Conservation Capacity of the Ecotone of the Forest and Grassland in HulunBuir

2013 ◽  
Vol 807-809 ◽  
pp. 1875-1880
Author(s):  
Lin Li ◽  
Yan Mei Chen ◽  
Yan Ping Wang
Keyword(s):  
Land Use ◽  
Water Conservation ◽  
Meteorological Data ◽  
Remote Sensing Data ◽  
Forest Land ◽  
Total Water ◽  
Maximum Value ◽  
Unused Land ◽  
Land Use Types ◽  
Average Water

Based on the remote sensing data and meteorological data of MODIS, this paper studied the water conservation capacity of different land use type of the ecotone of the forest and grassland in Hulun Buir with the help of the ArcGIS software. The results shows that the average of the water conservation capacity of 11 years of the whole ecotone of the forest and grassland in Hulun Buir is 62.78×108m3/yr. Among of these, the forest land accounts for 69.37% of the total water conservation capacity, and the grassland, the cultivated land and the unused land account for 23.36%, 3.67% and 3.60%. And the water conservation capacity of the four land use types presented a fluctuated improving trend. The average water conservation capacity in each year of the unit area of the ecotone achieved its maximum value, 498.43m3/hm2 ,in 2003, and achieved its minimum value,193.03m3/ hm2,in the year of 2007.

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

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.

scholarly journals Land Use Changes in the Zoige Plateau Based on the Object-Oriented Method and Their Effects on Landscape Patterns

2019 ◽  
Vol 12 (1) ◽  
pp. 14 ◽  
Author(s):  
Ge Shen ◽  
Xiuchun Yang ◽  
Yunxiang Jin ◽  
Sha Luo ◽  
Bin Xu ◽  
...  
Keyword(s):  
Land Use ◽  
Landscape Pattern ◽  
Land Use Changes ◽  
Object Oriented ◽  
Natural Ecosystem ◽  
Object Oriented Method ◽  
Unused Land ◽  
Zoigê Plateau ◽  
Effects Of Land Use ◽  
Zoige Plateau

Land use/land cover change (LUCC) is the most direct driving force of landscape pattern change. The Zoige Plateau is a natural ecosystem with the largest high-altitude swamp wetland in China and its land use pattern has undergone great changes in recent years, but how the changes of each land use type affect the landscape pattern is uncertain. Here, we used the object-oriented method to extract land use information in 2015. Then, combined with land use data, the land use change characteristics from 2000 to 2015 were analyzed. We used the correlation analysis method to analyze the effects of land use changes on landscape pattern systematically. Three key conclusions were reached. (1) Land use information for the Zoige Plateau could be extracted with high accuracy by combining the object-oriented method and support vector machine (SVM). The overall accuracy was 93.2% and the Kappa coefficient was 0.889. (2) The comprehensive dynamic degree of land use was the highest from 2010 to 2015. From 2000 to 2015, the wetland area decreased the fastest because 57.05% of the wetlands were transferred out. Construction land increased the fastest, and the transferred in area from grassland and farmland were the main reason. (3) The effects of unused land, farmland, and construction land on the overall landscape pattern were stronger than that of the other types, among which farmland had the most significant impact (with a correlation coefficient of 0.959, p < 0.001). The change of unused land was the most highly significant factor associated with the landscape area pattern, and both the water body and unused land showed strong correlations with landscape shape pattern change. This suggested that the effects of land use types occupying a relatively small area on the landscape pattern were intensified. This study will provide guidance for the environmental management of local land resources and other natural ecosystem areas.

scholarly journals Monitoring the changes in land use and landscape pattern in recent 20 years: A case study in Wuhan, China

2021 ◽  
Vol 272 ◽  
pp. 01022
Author(s):  
Yuwei Wang ◽  
Kaicheng Wu ◽  
Wang Gao
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Urban Growth ◽  
Landscape Pattern ◽  
Human Activities ◽  
Urban Landscapes ◽  
Gis Technology ◽  
Human Interventions ◽  
Almost All

Based on the land use data of 2000, 2010 and 2020, using GIS technology along with landscape ecology methods, this paper monitored the changes in land use and landscape pattern in Wuhan. The findings are as follows: (1) the main features of land use change in Wuhan were the expansion of urban area and the decline of cropland, forest, wetland and water in recent 20 years; (2) forest, wetland and water kept a transfer-out trend while urban kept a transfer-in trend; (3) the fragmentation degree of forest, grassland and urban landscapes decreased from 2000 to 2020; (4) the patch shapes of almost all landscapes tended to be more regular under the human interventions. It is thereby worth reducing the interference intensity of human activities on landscape pattern in the process of urban growth.

Prioritization of Soil Erosion-Susceptible Sub-Watersheds Using Multi-Criteria Decision Method in the Lesser Himalayas

2022 ◽  
pp. 74-91
Author(s):  
Shachi Pandey ◽  
Parmanand Kumar ◽  
Vijender Pal Panwar ◽  
Raman Nautiyal
Keyword(s):  
Land Use ◽  
Soil Erosion ◽  
Soil Quality ◽  
Remote Sensing Data ◽  
Morphometric Parameters ◽  
Himalayan Region ◽  
Elongation Ratio ◽  
Decision Method ◽  
Lesser Himalayas

Watersheds in the Lesser Himalayan region are highly susceptible to natural hazards, particularly those instigated by action and movement of water, such as soil erosion, flood, and mass movements of lands. Hilly watersheds with diversified land use and fragile ecosystems are responsible for accelerating soil erosion. Soil erosion is one of the most implicit hazards as it degrades water and soil quality in a watershed. The study prioritizes the soil erosion-susceptible zones in the Tons river watershed (India) in the Lesser Himalayan region. The interrelationships and role of morphometry, soil quality, slope, and land use together as four components in soil erosion are studied. Remote sensing data and multi-criteria decision method (MCDM) framework has been used to estimate soil erosion susceptibility of sub-watersheds. Results showed that morphometric parameters like elongation ratio and slope of sub-watersheds play a major role in determining the state of erosion.

scholarly journals Phytophthora austrocedri in Argentina and Co-Inhabiting Phytophthoras: Roles of Anthropogenic and Abiotic Factors in Species Distribution and Diversity

Forests ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1223
Author(s):  
María Laura Vélez ◽  
Ludmila La Manna ◽  
Manuela Tarabini ◽  
Federico Gomez ◽  
Matt Elliott ◽  
...  
Keyword(s):  
Land Use ◽  
Human Activities ◽  
Anthropogenic Impact ◽  
Anthropogenic Impacts ◽  
Abiotic Factors ◽  
Abundant Species ◽  
Phytophthora Species ◽  
Area Of Interest ◽  
Over Time

This work reports the first survey of Phytophthora diversity in the forests soils of Andean Patagonia. It also discusses the role of anthropogenic impact on Phytophthora distribution inferred from the findings on Phytophthora diversity and on the distribution of Phytophthora austrocedri-diseased forests. Invasive pathogen species threatening ecosystems and human activities contribute to their entry and spread. Information on pathogens already established, and early detection of potential invasive ones, are crucial to disease management and prevention. Phytophthora austrocedri causes the most damaging forest disease in Patagonia, affecting the endemic species Austrocedrus chilensis (D. Don) Pic. Sern. and Bizzarri. However, the relationship between anthropogenic impacts and the disease distribution has not been analyzed enough. The aims of this work were: to evaluate Phytophthora diversity in soils of Andean Patagonia using a metabarcoding method, and analyze this information in relation to soil type and land use; to assess the distribution of Austrocedrus disease over time in relation to anthropogenic and abiotic gradients in an area of interest; and to discuss the role of human activities in Phytophthora spread. High throughput Illumina sequencing was used to detect Phytophthora DNA in soil samples. The distribution of Austrocedrus disease over time was assessed by satellite imagery interpretation. Twenty-three Phytophthora species, 12 of which were new records for Argentina, were detected. The most abundant species was P. austrocedri, followed by P. × cambivora, P. ramorum and P. kernoviae. The most frequent was P. × cambivora, followed by P. austrocedri and P. ramorum. Phytophthora richness and abundance, and Austrocedrus disease distribution, were influenced by land use, anthropogenic impact and soil drainage. Results showed several Phytophthoras, including well-known pathogenic species. The threat they could present to Patagonian ecosystems and their relations to human activities are discussed. This study evidenced the need of management measures to control the spread of P. austrocedri and other invasive Phytophthora species in Patagonia.

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