Yuan-Man Hu's research while affiliated with Chinese Academy of Sciences and other places

Publications (53)

Article
Atmospheric environment in urban built-up area is severely influenced by the surrounding landscape pattern. Understanding the relationship between air pollution and surrounding landscape pattern at small scale has great significance for mitigating air pollution from the perspective of urban construction. The annual average concentrations of NO2, SO...
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Urbanization is one of the main reasons for biodiversity reduction and habitat fragmentation, which changes urban landscapes and ecological processes. Soil fauna is a significant component of urban ecosystems. It could make quick responses to rapid urbanization,being a typical environmental indicator. Due to the complicated disturbance factors of t...
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Understanding how landscape pattern determines population or ecosystem dynamics is crucial for managing our landscapes. Urban areas are becoming increasingly dominant social-ecological systems, so it is important to understand patterns of urbanization. Most studies of urban landscape pattern examine land-use maps in two dimensions because the acqui...
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Urban expansion was simulated by SLEUTH model based on the data of Fuxin City, Northeast China in 1997-2013. The optimal parameters of urban expansion were obtained from SLEUTH model calibration, with the diffusion coefficient as 6, breed coefficient as 64, spread coefficient as 44, slope resistance as 52 and road gravity as 90. Urban growth types...
Article
LANDIS Pro 7.0 model was used to simulate the dynamics of aboveground biomass of ten broadleaved tree species in the Xiao Xing' an Mountains area under current and various climate change scenarios from 2000 to 2200, and carbon content coefficients (CCCs) were coupled to cal- culate the aboveground carbon sequestration rates (ACSRs) of these species...
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Based on field inventory data and vegetation index EVI (enhanced vegetation index), the spatial pattern of the forest biomass in the Great Xing'an Mountains, Heilongjiang Province was quantitatively analyzed. Using the spatial analysis and statistics tools in ArcGIS software, the impacts of climatic zone, elevation, slope, aspect and vegetation typ...
Article
In some European and North American countries where forestry is highly developed, both public and private forest ownership regimes have being existed for a long time. Currently, the researches about both the dynamics of forest landscape and habitat pattern and the relationship between habitat pattern and biological conservation in multi-ownership f...
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Based on the TM images and 3S technology, and by using normalized burn ratio (NBR) , this paper quantitatively evaluated the fire severity of burnt area in Huzhong forest region of the Great Xing' an Mountains from 1986 to 2010, and analyzed the relationships of the fire severity with environmental factors such as vegetation type, elevation, slope,...
Article
By characterizing the composition of road network in the Huzhong Forestry Bureau in Great Xing' an Mountains, Northeast China, we investigated the effects of road networks on landscape pattern by quantifying 1989 landscape pattern for each of the 17 forestry farms on maps with and without roads by principal component analysis (PCA). The results sho...
Article
Population is the most active factor affecting city development. To understand the distribution characteristics of urban population is of significance for making city policy decisions and for optimizing the layout of various urban infrastructures. In this paper, the information of the residential buildings in Shenyang urban area was extracted from...
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By using model combination method, this paper simulated the changes of response variable (tree species distribution area at landscape level under climate change) under three scenarios of environmental spatial heterogeneous level, analyzed the differentiation of simulated results under different scenarios, and discussed the effects of environmental...
Article
Based on geographic information system (GIS) technology and multi-objective location-allocation (LA) model, and in considering of four relatively independent objective factors (population density level, air pollution level, urban heat island effect level, and urban land use pattern), an optimized location selection for the urban parks within the Th...
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To timely and accurately acquire the spatial distribution pattern of wetlands is of significance for the dynamic monitoring, conservation, and sustainable utilization of wetlands. The small remote sensing satellite constellations A/B stars (HJ-1A/1B stars) for environmental hazards were launched by China for monitoring terrestrial resources, which...
Article
Choosing Xinzhuang Town in south Jiangsu Province as study area, and by using 1980, 1991, 2001, and 2009 high-resolution remote sensing images and GIS spatial analysis technology, an integrated expansion degree index model was established based on the existing indicators of construction land expansion, and the general and spatiotemporal differentia...
Article
Forest pest and forest fire are the two major disturbances of forest ecosystem, and there exists definite interaction between the disturbances at large spatial and temporal scales. In this paper, the spatially intuitional landscape model (LANDIS) was adopted to simulate the long-term (300 years) interaction between forest pest and forest fire in Hu...
Article
Based on the 1:10000 aerial photo in 1997 and the three QuickBird images in 2002, 2005, and 2008, and by using Barista software and GIS and RS techniques, the three-dimensional information of the residential community in Tiexi District of Shenyang was extracted, and the variation pattern of the three-dimensional landscape in the district during its...
Article
In this paper, three-dimensional building information was extracted from high resolution satellite image based on Barista software. Combined with ArcGIS software, the dynamic changes of the building landscape in Tiexi District of Shenyang City during urban renewal process were analyzed from the conversion contribution rate, building density, averag...
Article
As a pattern in which cities will develop in the future, ecological city is for the purpose of constructing one kind of ideal environment to live together. The ecological city is becoming the hot topic of urban development day by day in China. This article carries on the appraisal of the ecology cities in Liaoning Province based on the theory of gr...
Article
Research studies aimed at integrating socio-economic and geo-bio-physical factors in order to improve our understanding of the causes and effects of landscape change. The study reported in this paper addresses landscape change and driving forces of landscape change in the area of the upper reach of Minjiang River, China. Based on the remotely sense...
Article
By using the spatially explicit forest landscape model (LANDIS 6.0 PRO), the percentages of timber-harvesting area in Xiao Xing' anling Mountains under current harvesting scenario and under 11 harvesting scenarios with alternating harvesting intensities (alternating time was 10, 20 and 30 years, respectively) in 2000-2400 under climate change were...
Article
By using CLUE-S model, a scenario analysis was made on the land use/cover change in the upper reaches of Minjiang River from 2000 to 2020, based on the historic development trend and the regulations of policies "natural forest protection" and "grain for green". In 2000-2020, according to the historic development trend, the forestland area (landscap...
Article
Taking the broad-leaved Korean pine forest area in Changbai Mountains, a typical eastern forest belt of Northeast China for global change as test object, and by using the approaches of trenching-plot and infrared gas exchange analyzer, this paper analyzed the soil respiration in a selected series of degraded Korean pine forest ecosystem, i.e., broa...
Article
The demand for accurate and up-to-date spatial information of urban buildings is becoming more and more important for urban planning, environmental protection, and other vocations. Today's commercial high-resolution satellite imagery offers the potential to extract the three-dimensional information of urban buildings. This paper extracted the three...
Article
Forest road has far-reaching effects on plant species diversity across varying scales, and the estimation of its effect distance and effect zone is a key issue to integrate the road effect and ecological processes in forest area. In this paper, ten transects, 2 m wide and extending 50 m from varying grade roads including main road, main line for wo...
Article
The reform of collective forest property has increased the farmers' income, and brought new development to forestry. On the basis of expatiating the conception of collective forest property and related management system, this paper introduced in detail the course, main ways, and effects of the reform in Liaoning Province, analyzed the research prog...
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Based on the five temporal Landsat TM remote sensing data of 1988, 1992, 1997, 2000, and 2004, and by using GIS spatial analysis and landscape pattern analysis, this paper analyzed the spatiotemporal pattern of urban growth and its driving forces in the urban agglomeration of central Liaoning Province (UACLP). From 1988 to 2004, the urban area in t...
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Fuel is the basic component of forest ecosystems. It is one of the most important factors that influence forest fire ignition and fire severity. Hence, it has drawn much attention from researchers worldwide. We reviewed the current status of forest fuel studies from four aspects: 1) forest fuel properties, including physical and chemical properties...
Article
Aims Changes in permafrost wetland plant communities were indicators of the retreat of permafrost in the Da Hinggan Mountains in China. Our objective was to understand the changes in species diversity and ecological characteristics of permafrost wetland plant communities along environmental gradients as the keys to predict changes in permafrost and...
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A comprehensive study using ecological engineering analysis was conducted on the influence of the hydrology process in the Yellow River Delta. It was found that water and sediment played an important role in the formation and maintenance of the estuarine wetland. Based on hydrological data (1950–2005), meteorological data (1954–2005) and landscape...
Article
By using 1985, 1995, 1997, 2000 and 2004 satellite images and GIS technology, three indices including built-up area density, expansion intensity index, and fractal dimension were chosen to analyze the spatiotemporal characteristics, spatial differentiation, and morphological changes of urban and rural built-up areas in Shenyang City in 1985-2004, w...
Article
Studying the changes of species diversity in plant communities along latitude gradients is important to discover the correlation between biodiversity and environmental factors. Along the main ridges of the Great Xing’an Mountains, 12 natural permafrost wetlands in the valleys were investigated from north to south. Latitudinal changes in species div...
Article
By using two-way indicator species analysis (TWINSPAN) and detrended correspondence analysis (DCA), this paper analyzed the environmental gradients of the species diversity and distribution of permafrost wetland plant communities in 12 valleys at different latitudes of the Great Xing' an Mountains. The plant communities in the 12 valleys could be c...
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With the pressure on ecological environment from rapid urbanization and decreasing farmland becoming more and more concerned in the world, especially in developing countries, such as China, the spatial-temporal change of farmland, even the change trends in the future, should be analyzed and forecasted to serve for regional and national social, econ...
Article
By using GIS technology, and selecting slope, relative distance to viewpoints, relative distance to tourism roads, visual probability of viewpoints, and visual probability of tourism roads as the indices, the landscape sensitivity of Houshi Forest Park was assessed, and an integrated assessment model was established. The AHP method was utilized to...
Article
Based on topographical characteristics, five factors including comparative slope, comparative distance, mutual visibility, vision probability, and striking degree were chosen to assess the landscape sensitivity of major view points in Houshi National Forest Park. Spatial analysis in GIS was used for exploring the theory and method of landscape sens...
Article
Based on the 1981-2000 observation data of climate factors and snow depth in Northeast China, frost number model was applied to approach its applicability in the regionalization of the permafrost in this area. The results indicated that the permafrost in Northeast China was dominated by discontinuous permafrost, including large piece permafrost, la...
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Based on the 1988, 1992, 1997, 2000, and 2004 Landsat TM remote sensing data of Yingkou City, Liaoning Province, the urban and rural settlement growth and land use change in the city from 2005 to 2030 were simulated and predicted by using the SLEUTH urban growth and land use change model with six scenarios (current trend scenario, no protection sce...
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According to the topography, land type suitability and human activity, the urban area of Shenyang City was regionalized into four landscape functional regions, i.e., economic and cultural supporting region, ecological equilibrium region (including northern high plain equilibrium sub-region and southern low plain equilibrium sub-region), ecological...
Article
By using time series Landsat TM satellite images and adopting GIS spatial analysis and landscape pattern analysis methods, this paper studied the spatiotemporal diversity of urban growth and the evolution of urban landscape pattern in Shenyang, and examined their driving forces. The results showed that in 1988-2004, the urban area in Shenyang incre...
Article
Based on GIS, the spatial distribution of soil loss and sediment yield in Heishui and Zhenjiangguan sub-watersheds at the upper reaches of Minjiang River was simulated by using sediment delivery-distribution (SEDD) model, and the effects of land use/cover types on soil erosion and sediment yield were discussed, based on the simulated results and re...
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Based on RS and GIS techniques, the distribution extent of the dry valley in upper reaches of Minjiang River was determined, with the dynamics and influence width of its landscape boundary analyzed. The results indicated that the dry valley had a gradually expanded distribution, and the total length of its boundary was increased. The boundary compl...
Article
Based on GIS, a sediment delivery distributed (SEDD) model was established to simulate the spatial patterns of annual soil water erosion and sediment yield in two sub-watersheds at the upper reaches of Minjiang River. The model was based on the revised universal soil loss equation (RUSLE) for calculating the annual soil water erosion, and coupled w...
Article
The remote sensing (RS) and geographical information system (GIS) technologies were adopted and a mathematic method was developed to evaluate the changes of ecosystem services in the upper reaches of Minjiang River-valley for providing advices to manage the ecosystem. The results showed that the land use change mainly occurred on forest, farmland a...
Article
Based on remote sensing images and geographic information system, and by using landscape metrics and Kappa coefficient, this paper studied the farmland landscape change in Wenchuan County of Minjiang River upper reach. A logistic regression model was used to analyze the driving forces of this change, with elevation, gradient, aspect, and the distan...
Article
Landscape changes were traced over the 20 years from 1974 to 1995 in the upper Minjiang River basin, one of the most important forest regions in China, based on satellite image interpretation to provide basic data for local decision-making as well as sustainable landscape use and management. Results revealed that landscape from 1974 to 1995 changed...
Article
This article focuses on the seasonal and spatial changes of CH4 emission from the natural reed marsh of Liaohe Delta, China. Field experiments showed that this natural wetland acts as a CH4 sink in spring (-30 approximately -1000 microg/m2 x h), a strong source in summer (400-3000 microg/m2 x h) and a weak source in autumn (< 400 microg/m2 x h). Re...
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Ecological restoration is widely employed from tens to millions of hectares in space, and from tens of days to thousands of years in time, which forces consideration of it thoroughly. We argue that three questions are the most important among the contents relevant of ecological restoration, including why, what and how to restore degraded systems. W...
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Habitat pattern change of red-crowned cranes (Grus japonensis) in the Liaohe Delta between 1988 and 1998 was analyzed with the help of Spatial Diversity Index based on remote sensing and field investigation. The result showed that the influence from human activities on the wetland habitat of red-crowned cranes was prominent with the development of...
Article
Boundaries between different forest types in Changbai Mountain Eastern China are results from complex interactions between forest ecosystems, topography, and geomorphology. Detecting and quantifying the transitional zones are highly important since high environmental heterogeneity and biodiversity are often found within these zones. In this study,...
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Horqin Sand Land is regarded as the typical region for studying the problem of desertification. The integration of 3S(GIS, GPS and RS) techniques offer a most helpful method to study and monitor the dynamics of desertification. Based on the data derived from 3 periods' multitemporal Landsat TM imagery of the 1990s, the regional land use and dynamic...

Citations

... The correlation between PM 10 and PM 2.5 concentrations and patch type area ratio index (Pland), maximum patch index (LPI), and landscape type area index (CA) of construction land decreased. On a large scale, the NO 2 concentration and the maximum patch index (LPI) of building land were significantly enhanced (Table 5), which may be due to the change in building density [21] which changed human activities and thus promoted the accumulation of surrounding pollutants. ...
... Referring to previous studies (Liu et al., 2017;Luan et al., 2019;Lu et al.,2021;Chen et al., 2022), some landscape metrics were widely used in urban thermal environment studies and showed some influence on LST. Therefore, in this study, four 2D metrics were selected to describe the horizontal landscape pattern of urban buildings and URMs in terms of composition and configuration, including building density (BD), mountains vegetation coverage ratio (MVCR), landscape shape index of buildings (LSI_Building) and landscape shape index of URMs (LSI_URM). ...
... Traditionally, the evaluation of simulated results of most FLMs is conducted by comparing the predictions with results from empirical knowledge, other model outputs, and/or field observation data (Blanco et al., 2007;Busing et al., 2007;Ma et al., 2014a). For example, field collected data were used to validate the phenological predictions of the PHENIPS model in Bohemian forests (Berec et al., 2013). ...
... Moreover, elevation can also affect forest biomass by influencing rainfall and controlling soil moisture conditions [13,62]. Numerous studies have demonstrated that forest biomass decreases with the increase of slope [27,63], which is in contradiction to our results. In general, trees struggle to grow in a forest with a high slope [27], and vegetation often grows more luxuriantly and has higher biomass in a region with a low slope [63]. ...
... These conservation aims, however, vary among different forest ecosystems and so do the management targets of private or public forest landowners [4][5][6]. Forest owners are grouped into different ownership categories according to legal ownership status and property sizes [7,8], often resulting in particular spatial forest ownership patterns at the landscape scale [9][10][11]. These ownership patterns and the related management characteristics are generally decisive not only for forest stand structures [9, 12-14, 15••, 16] but also for forest biodiversity patterns and nature conservation planning worldwide [12,[17][18][19][20]. ...
... It has been reported that 156 fires occurred during 1953-2010 with a total burned area of 38,713 ha [41]. Most fires in Huzhong are characterized by milder ground fires rather than crown fires that mostly happen in North America and western Russia [42] and are mainly caused by lightning, accounting for more than 60% of all fire cases [43]. In 2017-2018, eight fires occurred in the Huzhong area as a result of lightning ( Figure 1). ...
... For example, Su et al. [26] analyzed the land use and landscape pattern in a different period to reflect its spatiotemporal changes characteristics and its causes, but ignored the overall spatial heterogeneity of landscape pattern. Zhang et al. [27] and Shi et al. [28] systematically analyzed the spatiotemporal changes processes of land use and landscape pattern in watersheds. The former study only quantified the temporal influencing factors of land use changes, and the latter study described the temporal and spatial influencing factors respectively, but not quantitatively. ...
... At present, classification methods in quantitative ecology have become indispensable to modern vegetation research. Two such methods, two-way indicator species analysis (TWINSPAN) and detrended correspondence analysis (DCA), have been widely used in quantitative classification of mountain plant communities, such as forests and grasslands (Sun et al., 2009;Lian et al., 2015). ...
... Each of these methods has been widely used in fire management across the world, including the United States (Stephens and Moghaddas, 2005;Reinhardt et al., 2008;Knapp et al., 2017), Canada (Suffling et al., 2008), the Mediterranean regions (Fernandes and Rigolot, 2007;Piqué and Domènech, 2018), and Australia (McCaw et al., 2002;Bradstock et al., 2006;Furlaud et al., 2017). There is a long history of using firebreaks for fire management in China, especially in the northeast (Li et al., 2010;Li et al., 2012); however, few studies have focused on the effect of firebreaks in terms of their physical features (e.g. density and width) and spatial arrangements. ...
... Besides these, one of the change analysis methods the transition matrix is a widely used technique, which gives a cross-tabulation matrix including change directions and quantities and allows the determination of differences between systematic and random land cover transitions (Isabel et al., 2011;Lu et al., 2004). Transition cross-tabulation matrix-based land cover changes analyses mainly determine total losses and gains without the geographic locations and transformative changes of land cover transitions (Johnson & Zuleta, 2013;Li et al., 2009). The maps or tables of the analyses are tested or ordered at separate intervals, and the analysis interested the contiguous periods but omits the next process of land cover transitions (Liu & Zhu, 2010;Zhou et al., 2008). ...