Relationships between landscape patterns and fire occurrence within a successional gradient in sagebrush steppe–juniper woodland

2011 ◽  
Vol 20 (1) ◽  
pp. 69 ◽  
Author(s):  
Aaron D. Roth ◽  
Stephen C. Bunting ◽  
Eva K. Strand
Keyword(s):  
Landscape Metrics ◽  
Landscape Structure ◽  
Linear Regression Analysis ◽  
Spatial Arrangement ◽  
Simulation Software ◽  
Landscape Patterns ◽  
Sagebrush Steppe ◽  
Fire Occurrence ◽  
Surface Fire ◽  
Western Juniper

Expansion of western juniper (Juniperus occidentalis Hook. var. occidentalis) has altered vegetation composition, fire behaviour and fire potential throughout south-western Idaho and eastern Oregon. Utilising GIS-derived products and fire-simulation software, the influence of the spatial arrangement of different woodland developmental stages on simulated surface fire occurrence was evaluated. Custom fuel models and a recent vegetation map processed in FARSITE under moderate fire conditions were used to create a fire-occurrence grid in three sixth-order watersheds on the Owyhee Plateau of south-western Idaho. Landscape pattern metrics were selected to quantify the spatial arrangement of plant communities within a neighbourhood around points from each successional stage randomly placed within each watershed. Linear regression analysis of fire occurrence and each of the selected landscape metrics was compared for four successional stages of western juniper encroachment to assess the effect of landscape-scale vegetation arrangement on fire occurrence. The landscape structure had little influence on whether an early-successional area burns in a surface fire, whereas the surrounding landscape structure influenced whether a late-successional or mature woodland area burned. Landscape metrics that showed significance in late-successional and mature woodland stages include patch density, mean area and Simpson’s diversity.

scholarly journals Contribution of landscape metrics to the assessment of scenic quality - the example of the landscape structure plan Havelland/Germany

2009 ◽  
Vol 10 ◽  
pp. 1-17 ◽  
Author(s):  
Helge Herbst ◽  
Michael Förster ◽  
Birgit Kleinschmit
Keyword(s):  
Landscape Metrics ◽  
Landscape Structure ◽  
Environmental Planning ◽  
Diversity Index ◽  
Structural Diversity ◽  
Objective Evaluation ◽  
Landscape Patterns ◽  
Edge Density ◽  
Aesthetic Quality ◽  
Important Indicator

The scenic quality of a landscape is a natural resource that is to be preserved according to German and international law. One important indicator for the evaluation of this value is the structural diversity of the landscape. Although Landscape Metrics (LM) represent a well-known instrument for the quantification of landscape patterns, they are hardly used in applied landscape and environmental planning. This study shows possibilities for the integration of LM into a commonly used method to assess scenic quality by the example of a Landscape Structure Plan. First results indicate that especially Shannon's Diversity Index and Edge Density are suitable to achieve an objective evaluation of the structural diversity as indicator for scenic quality. The addition of qualitative parameters to the objective structural analysis is discussed. Moreover, the use of landscape scenery units and raster cells as basic geometry has been compared. It shows that LM can support the evaluation of the aesthetic quality in environmental planning, especially when integrated into commonly used evaluation methods.

Geosystems of Middle Siberia southern part: mapping methodology and results

2021 ◽  
Vol 970 (4) ◽  
pp. 35-44
Author(s):  
G.I. Lysanova ◽  
Ju.M. Semenov ◽  
A.A. Sorokovoi ◽  
I.V. Balyazin
Keyword(s):  
Landscape Structure ◽  
Remote Sensing Data ◽  
Landscape Patterns ◽  
Mountain Areas ◽  
Space Images ◽  
Earth Remote Sensing ◽  
Horizontal Structure ◽  
Composition And Structure ◽  
Geographical Regionalization ◽  
Middle Siberia

The сlassification of geosystem used in mapping is based on a system-hierarchic approach to detecting the co-involvement of landscape taxons. At the same time, we took into account the positioning of individual territories in the system of physical- geographical regionalization. The complexity of the landscape structure of the studied territory is due to its location at the junction of high- and lowland regions belonging to four physical-geographical areas. In the area under study, we identified and described more than 200 groups of fairies, which were then typed into classes of facies, geomes, and groups of geomes. Geoinformation mapping is performed using vector topographic basis and Earth remote sensing data. The decryption of synthesized space images was carried out manually and was based on field landscape surveys data. Digitization and indexing of landscape contours, creation, design and layout of the map were carried out in GIS MapInfo Professional. The cartographical analysis revealed regional differences in the complexity of landscape horizontal structures of high- and lowland regions, as well as the composition and structure of typological spectra of regional geosystems. Lowland geosystems mostly have a fairly uniform horizontal structure and large areas of landscape patterns. At the same time, mountain areas are characterized by considerable complexity and contrast of landscape structure.

scholarly journals SPATIO-TEMPORAL ANALYSIS OF LANDSCAPE PATTERNS IN THE CATOLÉ WATERSHED, NORTHERN MINAS GERAIS1

2018 ◽  
Vol 42 (4) ◽  
Author(s):  
Rodrigo Nogueira Martins ◽  
Selma Alves Abrahão ◽  
Danilo Pereira Ribeiro ◽  
Ana Paula Ferreira Colares ◽  
Marco Antonio Zanella
Keyword(s):  
Landscape Metrics ◽  
Riparian Vegetation ◽  
Temporal Analysis ◽  
Bare Soil ◽  
Landscape Patterns ◽  
Core Area ◽  
Sparse Vegetation ◽  
Dense Vegetation ◽  
Processing Level ◽  
Spatio Temporal

ABSTRACT The aim of this study was to quantify the spatio-temporal changes in land use/ cover (LULC), as well as analyze landscape patterns over a 20-year period (1995 - 2015) in the Catolé watershed, northern Minas Gerais State, using landscape metrics. The LULC maps were obtained using Landsat 5 and 8 data (Processing level 1) through supervised classification using the maximum likelihood classifier. Seven thematic classes were identified: dense vegetation, sparse vegetation, riparian vegetation, cropland, planted forest, bare soil, and water. From the LULC maps, classes related to the natural landscape (dense, sparse, and riparian vegetation) were grouped into forest patches, which was then ordered by size: very small (< 5 ha); small (5 - 10 ha); medium (10 - 100 ha); large (100 ha); and a general class (no distinction of patch size). Then, metrics of area, size and density, edge, shape, proximity and core area were calculated. The dense vegetation portion of the study area decreased considerably within a given time, while the portion of cropland and bare soil increased. Overall, in the Catolé river basin, the total area of natural vegetation decreased by 3,273 hectares (4.62%). Landscape metrics analysis exhibited a reduction in the number of very small patches, although the study area was still considered as fragmented. Moreover, a maximum edge distance of 50 m is suggested for conducting studies involving core area metrics in the Catolé watershed, as values above this distance would eliminate the very small patches.

scholarly journals Modeling Land Use Changes and their Impacts on Non-Point Source Pollution in a Southeast China Coastal Watershed

2018 ◽  
Vol 15 (8) ◽  
pp. 1593 ◽  
Author(s):  
Xin Zhang ◽  
Lin Zhou ◽  
Yuqi Liu
Keyword(s):  
Land Use ◽  
Point Source ◽  
River Basin ◽  
Landscape Metrics ◽  
Land Use Changes ◽  
Landscape Patterns ◽  
Cultivated Land ◽  
Point Source Pollution ◽  
Coastal Watershed ◽  
Non Point Source Pollution

Changes in landscape patterns in a river basin play a crucial role in the change on load of non-point source pollution. The spatial distribution of various land use types affects the transmission of non-point source pollutants on the basis of source-sink theory in landscape ecology. Jiulong River basin in southeast of China was selected as the study area in this paper. Aiming to analyze the correlation between changing landscape patterns and load of non-point source pollution in this area, traditional landscape metrics and the improved location-weighted landscape contrast index based on the minimum hydrological response unit (HRULCI) were applied in this study, in combination with remote sensing and geographic information system (GIS) technique. The results of the landscape metrics showed the enhanced fragmentation extent and the decreasing polymerization degree of the overall landscape in the watershed. High values of HRULCI were concentrated in cultivated land, while low HRULCI values mostly appeared in forestland, indicating that cultivated land substantially enhanced non-point source pollution, while forestland inhibited the pollution process.

scholarly journals On the Scale Effect of Relationship Identification between Land Surface Temperature and 3D Landscape Pattern: The Application of Random Forest

2022 ◽  
Vol 14 (2) ◽  
pp. 279
Author(s):  
Qiong Wu ◽  
Zhaoyi Li ◽  
Changbao Yang ◽  
Hongqing Li ◽  
Liwei Gong ◽  
...  
Keyword(s):  
Random Forest ◽  
Linear Regression ◽  
Surface Temperature ◽  
Land Surface Temperature ◽  
Landscape Metrics ◽  
Landscape Pattern ◽  
Land Surface ◽  
Landscape Patterns ◽  
Impervious Surfaces ◽  
Multi Scale

Urbanization processes greatly change urban landscape patterns and the urban thermal environment. Significant multi-scale correlation exists between the land surface temperature (LST) and landscape pattern. Compared with traditional linear regression methods, the regression model based on random forest has the advantages of higher accuracy and better learning ability, and can remove the linear correlation between regression features. Taking Beijing’s metropolitan area as an example, this paper conducted multi-scale relationship analysis between 3D landscape patterns and LST using Pearson Correlation Coefficient (PCC), Multiple Linear Regression and Random Forest Regression (RFR). The results indicated that LST was relatively high in the central area of Beijing, and decreased from the center to the surrounding areas. The interpretation effect of 3D landscape metrics on LST was more obvious than that of the 2D landscape metrics, and 3D landscape diversity and evenness played more important roles than the other metrics in the change of LST. The multi-scale relationship between LST and the landscape pattern was discovered in the fourth ring road of Beijing, the effect of the extent of change on the landscape pattern is greater than that of the grain size change, and the interpretation effect and correlation of landscape metrics on LST increase with the increase in the rectangle size. Impervious surfaces significantly increased the LST, while the impervious surfaces located at low building areas were more likely to increase LST than those located at tall building areas. It seems that increasing the distance between buildings to improve the rate of energy exchange between urban and rural areas can effectively decrease LST. Vegetation and water can effectively reduce LST, but large, clustered and irregularly shaped patches have a better effect on land surface cooling than small and discrete patches. The Coefficients of Rectangle Variation (CORV) power function fitting results of landscape metrics showed that the optimal rectangle size for studying the relationship between the 3D landscape pattern and LST is about 700 m. Our study is useful for future urban planning and provides references to mitigate the daytime urban heat island (UHI) effect.

Relating surface fire spread to landscape structure: An application of FARSITE in a managed forest landscape

2007 ◽  
Vol 83 (4) ◽  
pp. 275-283 ◽  
Author(s):  
Soung-Ryoul Ryu ◽  
Jiquan Chen ◽  
Daolan Zheng ◽  
Jacob J. Lacroix
Keyword(s):  
Landscape Structure ◽  
Fire Spread ◽  
Forest Landscape ◽  
Managed Forest ◽  
Surface Fire

Spatial patterns on the sagebrush steppe/Western juniper ecotone

Plant Ecology ◽  
2006 ◽  
Vol 190 (2) ◽  
pp. 159-173 ◽  
Author(s):  
Eva K. Strand ◽  
Andrew P. Robinson ◽  
Stephen C. Bunting
Keyword(s):  
Spatial Patterns ◽  
Sagebrush Steppe ◽  
Western Juniper

scholarly journals Fire History and Western Juniper Encroachment in Sagebrush Steppe

1999 ◽  
Vol 52 (6) ◽  
pp. 550 ◽  
Author(s):  
Richard F. Miller ◽  
Jeffrey A. Rose
Keyword(s):  
Fire History ◽  
Sagebrush Steppe ◽  
Western Juniper

Restoration of Mountain Big Sagebrush Steppe Following Prescribed Burning to Control Western Juniper

2014 ◽  
Vol 53 (5) ◽  
pp. 1015-1022 ◽  
Author(s):  
K. W. Davies ◽  
J. D. Bates ◽  
M. D. Madsen ◽  
A. M. Nafus
Keyword(s):  
Prescribed Burning ◽  
Sagebrush Steppe ◽  
Big Sagebrush ◽  
Western Juniper

scholarly journals Can we combine structural functionality and landscape services assessments in order to estimate the impact of landscape structure on landscape services?

2013 ◽  
Vol 21 (4) ◽  
pp. 2-14 ◽  
Author(s):  
Hana Skokanová
Keyword(s):  
Czech Republic ◽  
Landscape Metrics ◽  
Landscape Structure ◽  
The Czech Republic ◽  
Landscape Services ◽  
Joint Application ◽  
Landscape Types ◽  
The Impact

Abstract This paper investigates two methods of assessing structural functionality and landscape services, and the potential of their joint application in order to estimate the impact of landscape structure in terms of structural functionality on landscape capacity to provide various services. The methods were tested in three different landscape types of the Czech Republic. The results showed that linking these two methods might help in estimating the impact of landscape structure on some landscape services in landscape types with a prevalent valuable matrix, but are dependent on landscape metrics defining individual functionality groups

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