LBA-ECO LC-09 VEGETATION COMPOSITION AND STRUCTURE IN THE BRAZILIAN AMAZON: 1992-1995

2009 ◽  
Author(s):  
M. BATISTELLA, ◽  
E.S. BRONDIZIO, ◽  
E.F. MORAN,
Keyword(s):  
Brazilian Amazon ◽  
Vegetation Composition ◽  
Composition And Structure ◽  
Vegetation Composition And Structure

scholarly journals Technique for describing woody vegetation composition and structure in inventory type classification, ordination and animal habitat surveys

Koedoe ◽  
1977 ◽  
Vol 20 (1) ◽  
Author(s):  
B. J. Coetzee ◽  
W. P.D. Gertenbach
Keyword(s):  
Growth Form ◽  
Canopy Cover ◽  
Vegetation Composition ◽  
Quadrat Size ◽  
Class A ◽  
Height Class ◽  
Composition And Structure ◽  
Type Classification ◽  
Vegetation Composition And Structure ◽  
Animal Habitat

Woody structure and composition is recorded to provide for calculating per species, stem growth form and height class: (a) canopy regime at different height levels; (b) total projected canopy cover; and (c) density. Quadrat size is determined independently at each site for each height class to suit the density and distribution of plants.

Hedges and Green Lanes: Vegetation Composition and Structure

2006 ◽  
Vol 15 (8) ◽  
pp. 2595-2610 ◽  
Author(s):  
M. P. Walker ◽  
J. W. Dover ◽  
T. H. Sparks ◽  
S. A. Hinsley
Keyword(s):  
Vegetation Composition ◽  
Composition And Structure ◽  
Vegetation Composition And Structure

Vegetation Composition and Structure of Eversgerd Post Oak Flatwoods, Clinton County, Illinois

2003 ◽  
Vol 10 (2) ◽  
pp. 111
Author(s):  
Bob Edgin ◽  
William E. McClain ◽  
Bob Gillespie ◽  
John E. Ebinger
Keyword(s):  
Vegetation Composition ◽  
Post Oak ◽  
Composition And Structure ◽  
Vegetation Composition And Structure

scholarly journals Multiple Ecological Drivers Determining Vegetation Attributes across Scales in a Mountainous Dry Valley, Southwest China

Forests ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1140
Author(s):  
Jie Yang ◽  
Yousry A. El-Kassaby ◽  
Wenbin Guan
Keyword(s):  
Spatial Variation ◽  
Community Composition ◽  
Vegetation Structure ◽  
Vegetation Composition ◽  
Spatial Processes ◽  
Spatial Variables ◽  
Multi Scale ◽  
Composition And Structure ◽  
Dry Valley ◽  
Vegetation Composition And Structure

Identifying the ecological processes determining spatial variation in community composition and structure is a central issue in arid areas, especially in the face of climate change. This study aims to estimate how environmental and spatial processes jointly determine vegetation attributes across scales in the Min dry valley, one of the dry valleys in Hengduan Mountainous region suffering severe ecological degradation. A total of 48 plots along slope transects were investigated at three sites along the dry valley, with vegetation and environmental information gathered. Distance-based Moran’s eigenvector maps (dbMEM) was used to extract local spatial variables, while geographic coordinates were used as regional spatial variables. We used redundancy analysis (RDA) and variation partitioning to detect the relative importance of environmental and spatial processes in influencing community composition and vegetation structure (including biomass, coverage, height, density, α and β diversity), and to identify the most determinant environmental variables at different spatial scales. Results showed that both environmental and spatial processes accounted for significant and comparable variations in both vegetation composition and structure. Local spatial variables provided significant and comparable contribution as regional spatial variables to vegetation composition, while provided more contribution than regional spatial variables to vegetation structure. Topography had an overriding effect relative to soil on both vegetation composition and structure. Multi-scale analyses showed elevation was the most important variable (associated with soil moisture and nutrient) at the regional scale; while microtopography, especially slope aspect and shape, dominated at the local scale. We also demonstrated how vegetation composition and structure varied along environmental gradients. The study revealed the overriding role of topography in determining vegetation attributes in this mountainous dry valley, highlighting the advantage of multi-scale spatial analysis for better understanding spatial variation in vegetation pattern and with their important implications for biodiversity conservation and ecological management in the arid mountain areas.

scholarly journals Manitoba’s endangered alvars: an initial description of their extent and status

2019 ◽  
Vol 132 (3) ◽  
pp. 238-253 ◽  
Author(s):  
Rebekah Neufeld ◽  
Cary Hamel ◽  
Chris Friesen
Keyword(s):  
Land Use ◽  
Information System ◽  
Geographic Information System ◽  
Land Ownership ◽  
Soil Characteristics ◽  
Livestock Grazing ◽  
Vegetation Composition ◽  
Composition And Structure ◽  
Initial Description ◽  
Vegetation Composition And Structure

Alvars are rare in Canada and uncommon globally. This study represents the first formal attempt to describe and delineate the extent of alvars in Manitoba. A systematic examination of the Interlake region’s edaphic and biological characteristics, using a geographic information system, resulted in the identification of 67 sites warranting further field study. Of these sites, 61 were surveyed and information was collected on vegetation composition and structure, soil characteristics, land ownership, and land use. Alvar was confirmed at 28 sites, extending over approximately 3930 ha in five geographically distinct clusters. Four putative types of alvar communities are described: grassland, shrubland, savannah, and wetland. Livestock grazing is the dominant land use and occurs across more than three-quarters of Manitoba alvar. Approximately 12% coincide with mining claims or quarry leases. Two-thirds occur on publicly owned land.

Fire and the Vegetation Composition and Structure of Sub-Tropical Heathlands in Southeastern Queensland

1988 ◽  
Vol 36 (5) ◽  
pp. 533 ◽  
Author(s):  
DC McFarland
Keyword(s):  
National Park ◽  
Plant Density ◽  
Vegetation Composition ◽  
Physical Status ◽  
Species Numbers ◽  
Free Interval ◽  
Composition And Structure ◽  
Foliage Density ◽  
Species Being ◽  
Vegetation Composition And Structure

Six heathland sites were studied in Cooloola National Park, south-eastern Queensland. Vegetation composition (species present and numbers) and structure (plant density, cover, height and vertical foliage density) were examined at each site with respect to time since last fire (0.5-10.5 years) and the two recognised microhabitat types (dry and wet). No significant change in species numbers or composition was detected in sites more than 1 year after fire, although the changing physical status (density and cover) of some plants could give the impression of species being 'lost' or 'gained' over time. On the basis of the structural attributes of the heathlands, and the maintenance of several obligate seed regenerator species, a minimum fire-free interval of 8 or 10 years is suggested for subtropical heathlands. Results from this study are compared with data collected from other Australian heathlands. In composition and structure, the temporal responses to fire in the Cooloola heathlands are similar to those in southern heathlands, albeit occurring at a possibly faster rate.

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