scholarly journals Current vegetation structure and composition of woody species in community‐derived categories of land degradation in a semiarid rangeland in Kunene region, Namibia

2020 ◽  
Vol 31 (18) ◽  
pp. 2996-3013
Author(s):  
Emilia N. Inman ◽  
Richard J. Hobbs ◽  
Zivanai Tsvuura ◽  
Leonie Valentine
Keyword(s):  
Land Degradation ◽  
Vegetation Structure ◽  
Woody Species ◽  
Derived Categories ◽  
Semiarid Rangeland

Distance effect from cloud forest fragments on plant community structure in abandoned pastures in Veracruz, Mexico

2006 ◽  
Vol 22 (4) ◽  
pp. 431-440 ◽  
Author(s):  
Miguel Angel Muñiz-Castro ◽  
Guadalupe Williams-Linera ◽  
José María Rey Benayas
Keyword(s):  
Species Richness ◽  
Vegetation Structure ◽  
Forest Restoration ◽  
Cloud Forest ◽  
Distance Effect ◽  
Basal Area ◽  
Woody Species ◽  
Primary Forest ◽  
Forest Fragments ◽  
Forest Region

Secondary succession was studied in a Mexican cloud forest region along a chronosequence of 15 abandoned pastures (0.25–80 y). Our objective was to determine the effects of distance from the forest border on successional vegetation structure and woody species richness along the chronosequence. Vegetation structure similar to that of mature forests recovered over 40–50 y, both close to (0–10 m) and away from (40–50 m) the border. Total woody species richness was similar for both distances but species composition differed significantly. When primary forest species were analysed separately, basal area, height, abundance and richness were all significantly higher close to the forest border. Primary species such as Quercus spp. (barochorous-synzoochorous) and Carpinus caroliniana (anemochorous) had lower basal area, density and height away from the border than close to it. Secondary species such as Lippia myriocephala (anemochorous) and Myrsine coriacea (endozoochorous) did not differ in their rate of colonization between distances. The limitation of seed dispersal and establishment for primary woody species away from forest borders suggests that propagules need to be introduced to accelerate forest restoration.

Woody species composition, diversity and vegetation structure of two protected areas along a climatic gradient in Burkina Faso (West Africa)

2019 ◽  
Vol 54 (3-4) ◽  
pp. 163-175
Author(s):  
Moussa Ganamé ◽  
Philippe Bayen ◽  
Issaka Ouédraogo ◽  
Kangbéni Dimobe ◽  
Adjima Thiombiano
Keyword(s):  
West Africa ◽  
Species Composition ◽  
Burkina Faso ◽  
Protected Areas ◽  
Vegetation Structure ◽  
Woody Species ◽  
Climatic Gradient

scholarly journals Woody Species Diversity, Vegetation Structure, and Regeneration Status of the Moist Afromontane Forest of Agama in Southwestern Ethiopia

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Abyot Dibaba ◽  
Teshome Soromessa ◽  
Alemayehu Kefalew ◽  
Admassu Addi
Keyword(s):  
Species Diversity ◽  
Plant Species ◽  
Vegetation Structure ◽  
Woody Plant ◽  
Woody Species ◽  
Sampling Technique ◽  
Systematic Sampling ◽  
Woody Plant Species ◽  
Regeneration Status ◽  
Southwestern Ethiopia

This study was conducted in Agama Forest in Kafa Zone, Southwestern Ethiopia, to assess species diversity, vegetation structure, and regeneration status of woody species. A systematic sampling technique was employed to collect vegetation data. Sixty (60) sample plots of 25 m × 25 m were laid at 300 m intervals all along ten grids interspaced 800 m apart. Sample plots of 25 m × 25 m were used to record DBH and H of all woody plant species reaching a DBH >2.5 cm and height >2 m. For the inventory of seedling and sapling, two subplots of 2 m × 5 m were used at the beginning and the end of the baseline on opposite sides of the main quadrat. Vegetation data such as DBH, height, seedling, and sapling density of woody species were recorded in each plot. Altogether, 72 woody plant species of 65 genera and 35 families were identified. Analysis of selected tree species showed diverse population structures. This study showed that small trees and shrubs dominated the Agama Forest, which revealed its status under a secondary regeneration stage. Study on the structure and regeneration of some woody species indicated that there are species that require urgent conservation measures. Sound management and monitoring, as well as maintenance of biodiversity and cultural and economic values of the forest, require conservation activities that encourage sustainable uses of the forest and its products.

Land degradation affects shrub growth responses to precipitation in a semiarid rangeland of north-eastern Patagonia (Argentina)

2017 ◽  
Vol 43 (3) ◽  
pp. 280-287 ◽  
Author(s):  
María Victoria Campanella ◽  
César Mario Rostagno ◽  
Lina Sonia Videla ◽  
Alejandro Jorge Bisigato
Keyword(s):  
Land Degradation ◽  
Growth Responses ◽  
North Eastern ◽  
Semiarid Rangeland

scholarly journals Vegetation structure and density of woody plant species in two woodland areas of Amhara National Regional State, Ethiopia

2010 ◽  
Vol 58 (1) ◽  
pp. 21-32
Author(s):  
Mahtot Alemu Biresaw ◽  
J. Pavliš
Keyword(s):  
Environmental Factors ◽  
Relative Density ◽  
Tree Species ◽  
Vegetation Structure ◽  
Tree Height ◽  
Woody Species ◽  
Slope Aspect ◽  
Important Species ◽  
Regional State ◽  
Boswellia Papyrifera

This study was conducted in Jawi and East Belesa districts of the Amhara National Regional State in Ethiopia. It has an objective of describing the vegetation structure in relation to different environmental factors in general and Boswellia papyrifera, which is economically important species in particular. Vegetation data were collected in both sites (Mosebit and Hamusit) using plots of 50 m x 50 m (0.25 ha). In total 15 sample plots were set up. In each plot, all trees with DBH (Diameter at Breast Height), i.e. at 1.3 m above the ground were measured using caliper. In each major plot four subplots (4 m × 4 m) were established. Tree height measured using Hypsometer (Vertex III). Data’s on different environmental variables (slope, aspect and altitude) of each plot were also taken respectively using laser rangefinder Impulse 200 Standard, an electronic compass Map-Star Module II and GPS Juno™ ST handheld (Trimble, USA). A total of 58 woody species belonging to 22 families were identified from both sites. A total of 241 trees/ha and 292 trees/ha were found in Mosebit and Hamusit study sites, respectively. The seedling density result indicates 3656 seedlings/ha and 2469 seedlings/ha in Mosebit and Hamusit study areas, respectively. The density of Boswellia Papyrifera, which is economically important species were 140 and 127 tree/ha in Mosebit, and Hamusit study areas, respectively. The relative density of different tree species in different height and diameter classes were determined by altitude, aspect, and gradient of the study areas. The study result concludes that distribution of the species, relative density, height class and diameter class of species in the two sites is dependent on environmental factors. Finally, the findings indicate that the two woodlands harbor, economically important tree species. Therefore, giving due attention in conserving these wood lands is important from ecological, economical and conservation point of view.

scholarly journals Floristic Composition, Vegetation Structure, and Regeneration Status of Woody Plant Species of Oda Forest of Humbo Carbon Project, Wolaita, Ethiopia

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Markos Kuma ◽  
Simon Shibru
Keyword(s):  
Vegetation Structure ◽  
Woody Plant ◽  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
Regeneration Status ◽  
Tree Data ◽  
Carbon Project ◽  
Dodonaea Angustifolia ◽  
Conservation And Management

Our current study was conducted in Oda forest to explore floristic composition, vegetation structure, and regeneration of woody species in a newly established Humbo Carbon Project. In the project, the above information for sufficient conservation and management of the forest is not well documented. Data were collected in October and December 2014. Thirty-two quadrats (20 m × 20 m) lying 100 m far apart were used for shrub and tree data. In each major plot, subplots (1 m2) were established at the center and corner for seedlings and saplings data. Altitude, slope, and aspect were measured using GPS and clinometers. DBH, basal area, and IVI were used for vegetation structure. Among 62 species confined in 32 families and 54 genera, Dodonaea angustifolia and Combretum molle were the densest and the most dominant and frequent species with higher IVI. Altitude and slope had significant effect (p<0.0001) on basal area and dominance. Bell and inverted J shaped patterns of selected woody species were identified. The seedling, sapling, and matured tree had 2.3%, 23.7%, and 74% density ha−1 of individuals, respectively. Generally, the study confirmed that very few species had dominance and abundance, influence of altitude and slope on species distribution, and fair regeneration of the forest.

scholarly journals Man-made soil drainage alters the vegetation structure and woody species distribution in campo de murundus

2020 ◽  
Vol 42 ◽  
pp. e49894
Author(s):  
Frederico Augusto Guimarães Guilherme ◽  
Hortência Soardi Maricato ◽  
Beatriz Schwantes Marimon ◽  
Firmino Cardoso Pereira ◽  
Luzia Francisca de Souza ◽  
...  
Keyword(s):  
Vegetation Structure ◽  
Diversity Index ◽  
Basal Area ◽  
Woody Species ◽  
Permanent Plots ◽  
Total Density ◽  
Soil Drainage ◽  
Differential Distribution ◽  
M 10 ◽  
Drainage Channels

Campos de murundus work as recharge zones and are important for the maintenance of water resources in Brazilian Cerrado. However, with the expansion of the agricultural frontier, this ecosystem may disappear or suffer high anthropogenic disturbances. The aim of the study was to evaluate the structure and distribution of woody species, after the implantation of artificial drainage channels in campo de murundus, in plots near and distant of the drains in the soil. We sampled woody individuals with ≥ 3 cm diameter at the base, and established 20 permanent plots of 20×50 m, 10 of which were between 0-20 m of the drains (edge) and 10 between 150-200 m distant from the drains (interior), totaling two hectares of survey. We recorded 47 species with total density of 230.5 ind.ha-1 and total basal area of 1.331 m2 ha-1. The diversity index of species was H’ = 3.18. We recorded higher density and basal area in the edge, and differential distribution and occupation of woody species in the microrelief of the murundus. This provides us strong evidence that the drains have altered the vegetation structure, especially in the edge of the remnant campos de murundus turning the vegetation woodier and denser.

scholarly journals Impact of land use on juvenile densities of woody plants in a West African savanna

2016 ◽  
Vol 19 ◽  
pp. 18-34
Author(s):  
Katrin Jurisch ◽  
Markus Bernhardt-Römermann ◽  
Rüdiger Wittig ◽  
Karen Hahn
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Soil Properties ◽  
Vegetation Structure ◽  
Environmental Parameters ◽  
Woody Species ◽  
West African ◽  
Initial Growth ◽  
Land Cover Types ◽  
Human Land Use

In West African savannas, human land use affects the density of woody species seedlings and saplings (juveniles) by altering the state of the physical, chemical, and biological characteristics of the land resulting in different land-cover types. We determined juvenile densities of 25 characteristic woody savanna species on non-arable sites, in fallows and in a protected area (in total 39 plots), and analyzed the influence of land use on juvenile densities. We further related the influence of land use on juvenile densities to 23 environmental parameters describing soil properties and vegetation structure. Soil acidity, particle size distribution of the soil, and vegetation structure differed between land-cover types. In terms of human impact, we detected five groups of species responding similarly to land use. Although we detected significant differences in soil properties, their direct effects on juvenile densities are less pronounced than their indirect effects. By altering the availability of resources, soil properties affect height and cover of all plants growing in the surrounding of a young woody plant, increasing the competition for light, water and nutrients during the establishment and initial growth. These effects are intensified by human land use and vary between land-cover types.

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