Landscape Pattern Evolution Processes of Wetlands and Their Driving Factors in the Xiong’an New Area of China

Wetland landscape patterns are the result of various ecological and hydrological processes. Based on the land use landscape types from 1980 to 2017, a transfer matrix, landscape pattern analysis index, and principal component analysis were used to analyze the landscape pattern evolution in the Xiong’an New Area of China, which has a large area with a lake and river wetlands. The results showed that the wetland area has changed greatly since 2000 and the beach land has decreased greatly, while the area of the lake and river wetlands has increased slightly. Beach land was the dominant landscape type of the wetland. The dominant degree of the wetland landscape showed a slightly decreasing trend, and the patches tended to be scattered. The shape complexity of the ponds was the lowest, while that of rivers was the highest. The fragmentation degree of the wetland patches increased, the proportion of landscape types tended to be equalized, and the landscape heterogeneity increased. The leading factors of the wetland landscape change can be summarized as socioeconomic, meteorological, and hydrological processes, with a cumulative contribution rate of 85.3%, among which socioeconomic development was the most important factor. The results have important guiding significance for the ecological restoration and management of wetlands in the Xiong’an New Area and other wetland ecosystems with rivers and lakes.

Download Full-text

Landscape Pattern Changes in the Xingkai Lake Area, Northeast China

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph16203820 ◽

2019 ◽

Vol 16 (20) ◽

pp. 3820 ◽

Cited By ~ 2

Author(s):

Xiaohui Liu ◽

Yuan Zhang ◽

Guihua Dong ◽

Guanglei Hou ◽

Ming Jiang

Keyword(s):

Landscape Pattern ◽

Remote Sensing Data ◽

Principal Component ◽

Landscape Fragmentation ◽

Landscape Patterns ◽

Paddy Fields ◽

Lake Area ◽

Landscape Types ◽

The Difference ◽

Relative Change

Understanding landscape change is important for ecologically sustainable development. In this paper, we assessed the spatiotemporal variations of landscape pattern in the Xingkai Lake area using remote sensing data from 1982, 1995, 2000, 2005, 2010, and 2015. Landscape patterns of marshlands, paddy fields, dry farmlands, and their combinations were analyzed at class and landscape levels. We examined the stability of landscape types through principal component analysis based on class level indices for landscape types. The results indicated that marshland areas decreased significantly by 33.87% but paddy fields increased by 1.84 times from 1982 to 2015. The largest conversion of dry farmlands to paddy fields was 90.88 km2 during the period 2010–2015. In contrast, the largest conversion of paddy fields to dry farmlands was 86.03 km2 during the period 2000–2005. The difference in relative change revealed that dry farmlands had experienced a greater relative change than paddy fields since 2000. The interspersion and juxtaposition index decreased, while the number of patches grew. This showed that landscape fragmentation was increasing and the landscape pattern was becoming dispersed. Marshlands were more stable than paddy fields and dry farmlands across all time periods, except for the year 2005.

Download Full-text

Landscape change patterns at three stages of the construction and operation of the TGP

Scientific Reports ◽

10.1038/s41598-021-87732-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Ruikang Li ◽

Yangbing Li ◽

Bo Li ◽

Dianji Fu

Keyword(s):

Landscape Pattern ◽

Landscape Change ◽

Ecological Security ◽

Three Gorges ◽

Temporal Characteristics ◽

Landscape Type ◽

The Three Gorges ◽

Landscape Types ◽

Landscape Ecological ◽

Landscape Ecological Security

AbstractAnalyses of landscape change patterns that are based on elevation and slope can not only provide reasonable interpretations of landscape patterns but can also help to reveal evolutionary laws. However, landscape change patterns and their model in different landforms of the typical watershed in the Three Gorges Reservoir Area (TGRA) has not been quantified and assessed effectively. As a complex geographical unit, the ecological environment in the middle reach of the Yangtze River has experienced great changes due to the construction of the Three Gorges Project (TGP) and its associated human activities. Here, based mainly on a digital elevation model (DEM) and remotely sensed images from 1986, 2000, 2010, and 2017 and by using GIS technology, speeds/ trends of landscape change, the index of landscape type change intensity, landscape pattern indices, and landscape ecological security index, the spatial and temporal evolution characteristics of different elevations, slopes, and buffer landscape types were analyzed in typical watersheds, as well as an evolutionary model of the landscape pattern. The results indicated that (1) the landscape types along with the land classification and buffer zone that were influenced by the TGR construction have undergone a phased change, with the period 2000–2010 being the most dramatic period of landscape evolution during the impoundment period; (2) landscape type shifts from human-dominated farmland to nature-driven forestland and shrub-land as elevations, slopes and buffer distances increased. The landscape has shifted from diversity to relative homogeneity; (3) land types and buffer zones played essential roles in the landscape pattern index, which is reflected in the differences in landscape type indices for spatial extension and temporal characteristics. The results of this paper illustrate the spatial–temporal characteristics of various landscape types at three distinct stages in the construction of the TGR. These findings indicate that the landscape ecological security of the watershed is improving year by year. The follow-up development of the TGRA needs to consider the landscape change patterns of different landforms.

Download Full-text

Response of Variation of Water and Sediment to Landscape Pattern in the Dapoling Watershed

Sustainability ◽

10.3390/su14020678 ◽

2022 ◽

Vol 14 (2) ◽

pp. 678

Author(s):

Chong Wei ◽

Zhiqiang Zhang ◽

Zhiguo Wang ◽

Lianhai Cao ◽

Yichang Wei ◽

...

Keyword(s):

Landscape Pattern ◽

Sediment Yield ◽

Landscape Heterogeneity ◽

Swat Model ◽

Landscape Patterns ◽

Land Resource ◽

Low Carbon ◽

Water And Sediment ◽

The Relationship ◽

Runoff And Sediment Yield

The relationship between water-sediment processes and landscape pattern changes has currently become a research hotspot in low-carbon water and land resource optimization research. The SWAT-VRR model is a distributed hydrological model which better shows the effect of land use landscape change on hydrological processes in the watershed. In this paper, the hydrological models of the Dapoling watershed were built, the runoff and sediment yield from 2006 to 2011 were simulated, and the relationship between landscape patterns and water-sediment yield was analyzed. The results show that the SWAT-VRR model is more accurate and reasonable in describing runoff and sediment yield than the SWAT model. The sub-basins whose soil erosion is relatively light are mostly concentrated in the middle reaches with a slope mainly between 0–5°. The NP, PD, ED, SPIIT, SHEI, and SHDI of the watershed increased slightly, and the COHESION, AI, CONTAG, and LPI showed a certain decrease. The landscape pattern is further fragmented, with the degree of landscape heterogeneity increasing and the connection reducing. The runoff, sediment yield and surface runoff are all extremely significantly negatively correlated with forest, which implies that for more complicated patch shapes of forest which have longer boundaries connecting with the patches of other landscape types, the water and sediment processes are regulated more effectively. Therefore, it can be more productive to carry out research on the optimization of water and soil resources under the constraint of carbon emission based on the SWAT-VRR model.

Download Full-text

Temporal and Spatial Analyses of the Landscape Pattern of Wuhan City Based on Remote Sensing Images

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi7090340 ◽

2018 ◽

Vol 7 (9) ◽

pp. 340 ◽

Cited By ~ 3

Author(s):

Jianjun Lv ◽

Teng Ma ◽

Zhiwen Dong ◽

Yao Yao ◽

Zehao Yuan

Keyword(s):

Landscape Pattern ◽

Urban Areas ◽

Agricultural Landscape ◽

Urban Landscape ◽

Landscape Heterogeneity ◽

Central City ◽

National Level ◽

Landscape Patterns ◽

Wuhan City ◽

Entire Area

With the acceleration of the process of building a national-level central city in Wuhan, the landscape pattern of the city has undergone tremendous changes. In this paper, remote images are classified through the neural network classification method, based on texture extraction, and the evolution of landscape patterns was quantitatively analyzed, based on the method of moving windows, landscape metrics and urban density calculation, in order to accurately extract landscape types and perform quantitative analyses. Wuhan City is taken as an example. The surface coverage of Wuhan City from 1989 to 2016 is divided into four types: agricultural landscape clusters, forest landscape clusters, water landscape clusters, and urban landscape clusters. It was concluded that, during the study period, the landscape heterogeneity of the entire area in Wuhan has increased, but the central urban area in Wuhan has decreased. The development of urban areas has compacted inwards but expanded outwards. In addition, the western part of Wuhan City developed better than the eastern part.

Download Full-text

Historical landscape condition study of discontinued river corridor based on satellite image data analysis

10.5194/egusphere-egu21-3743 ◽

2021 ◽

Author(s):

Xiaoming Xu

Keyword(s):

Ecological Restoration ◽

Landscape Pattern ◽

Satellite Image ◽

Morphological Characteristics ◽

Image Data ◽

High Definition ◽

Landscape Type ◽

Historical Landscape ◽

Landscape Types ◽

River Corridor

<p>The historical landscape condition of discontinued river before discontinued flow is one of the core research fields of river ecological restoration and an important historical reference for the ecological restoration of discontinued river corridor. In this paper, the landscape condition of Yongding River, a discontinued river in northern China, is&#160;analyzed before its cut-off. Through the early KEYHOLE satellite high-definition image data interpretation analysis, the landscape type map of the river corridor before its cut-off was drawn. The overall winding degree (1.27) and the overall horizontal and vertical structure of the river before its cut-off were determined.&#160;In addition, the area proportion of the key landscape types in river corridor, such as channel, mid-channel bar and floodplain, is 12.82%, 8.8% and 16.29% respectively, and the morphological characteristics and distribution of the above key landscape types in each section of the river can be determined by quantitative analysis.&#160;On this basis, the landscape pattern index analysis method can be used to analyze and calculate the overall landscape pattern of the river corridor before cut-off.&#160;Combined with relevant historical hydrological data, the historical state of the river before its cut-off can be restored to a certain extent. These results are of great support to the channel ecological restoration, floodplain ecological reconstruction and riverbank ecological restoration.</p>

Download Full-text

Long Term Development of Forest Stand Structure Following Catastrophic Fire in Yellowstone National Park: Do Landscape Legacies Persist?

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.2000.3439 ◽

2000 ◽

Vol 24 ◽

pp. 160-164

Author(s):

William Romme ◽

Daniel Kashian

Keyword(s):

Landscape Pattern ◽

Yellowstone National Park ◽

National Park ◽

Stand Structure ◽

Landscape Heterogeneity ◽

Ecosystem Dynamics ◽

Landscape Patterns ◽

Small Scale ◽

Vegetation Development ◽

Forest Stand Structure

The importance of large, infrequent natural disturbances, particularly as they influence postÂdisturbance succession, is well recognized. The conceptualization of ecological systems and landscapes as mosaics of patches generated by disturbance emphasizes successional change, which in turn is a major component of ecologists' understanding of disturbance in a landscape context. However, paradigms of succession largely evolved for small-scale dynamics. Subsequently, these paradigms do not adequately predict the spatial variability that occurs within the perimeter of large, infrequent disturbances, nor do they adequately consider the effects of heterogeneity on recovery of the system. Understanding the nature of the disturbance mosaic and the factors controlling landscape patterns are crucial for predicting ecosystem dynamics and vegetation development in disturbance-prone landscapes, and research that addresses these questions remains a priority. Landscape heterogeneity following large, mfrequent fires is represented by a patchwork of burned and unburned vegetation as well as by a mosaic of burn severities (Turner et al. 1997, Romme et al. 1998), so that the mosaic of stand structure and function produced by fire is a legacy of the disturbance itself as well as that of the pre-fire forest. In this sense, large, infrequent fires are thought to impose a persistent influence on landscape pattern. Landscape pattern has large implications for biodiversity, determines the connectivity of habitat, affects the spread of disturbances such as insect outbreaks, and may influence the initiation and spread of small, frequent surface fires by affecting the spatial distribution of fuels. Similarly, spatial heterogeneity in stand structure that exists across a landscape may influence the propagation of crown fires (Van Wagner 1977, Turner and Romme 1994). Clearly, understanding the changes that occur in landscape pattern provides the key to understanding the dynamics of many ecological processes. Our study examines the natural changes that occur in landscape pattern with succession in Yellowstone National Park (YNP) between large, infrequent wildfires. The 1988 fires in YNP created a mosaic of burn severities that produced tremendous variation in density of lodgepole pine (Pinus contorta var. latifolia) seedlings across the landscape (Turner et al. 1994). Because the Yellowstone mosaic of post-fire seedling densities varies from high-density stands (>50,000 trees/ha), which will inevitably be subject to self-thinning, to low-density stands (

Download Full-text

Characteristics of Landscape Change Patterns at Three Distinct Stages of the Construction and Operation of the Three Gorges Reservoir From 1986 to 2017

10.21203/rs.3.rs-112382/v1 ◽

2020 ◽

Author(s):

Ruikang Li ◽

Yangbing Li ◽

Bo Li

Keyword(s):

Landscape Pattern ◽

Landscape Change ◽

Three Gorges Reservoir ◽

Landscape Patterns ◽

Land Resource ◽

Three Gorges ◽

Study Region ◽

Landscape Type ◽

The Three Gorges Reservoir ◽

The Three Gorges

Abstract Analyses of landscape change patterns that are based on elevation and slope can not only provide reasonable interpretations of landscape patterns but can also help to reveal evolutionary laws. As a complex geographical unit, the ecosystem environment in the middle reach of the Yangtze River has experienced great changes due to the construction of the Three Gorges Reservoir (TGR) and its associated human activities. Here, based mainly on a digital elevation model (DEM) and remotely sensed images from 1986, 2000, 2010, and 2017 and by using GIS technology, buffer analysis, landscape element change and landscape pattern indices, the spatial and temporal evolution characteristics of different elevations, slopes, and buffer landscape types were analyzed in a typical watershed, as well as an evolutionary model of the landscape pattern. The results indicated that (1) the landscape elements along the land classification and buffer zone that were influenced by the TGR construction have undergone a phased change, with the period 2000-2010 being the most dramatic period of landscape evolution during the impoundment period; (2) landscape type shifts from human-dominated farmland to nature-driven forestland and shrub-land as elevations, slopes and buffer distances increased. The landscape has shifted from diversity to relative homogeneity. (3) land types and buffer zones have exhibited a significant effect on the landscape pattern index, which is reflected in the differences in landscape type indices for spatial extension and temporal characteristics. The results of this study illustrate the pronounced effect of the TGR on landscape patterns, and these findings will elucidate the scientific basis and provide a reference for sustainable land resource management in the study region.

Download Full-text