Effects of uprooting tree on herbaceous species diversity, woody species regeneration status and soil physical characteristics in a temperate mixed forest of Iran

2012 ◽  
Vol 23 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Y. Kooch ◽  
S. M. Hosseini ◽  
J. Mohammadi ◽  
S. M. Hojjati
Keyword(s):  
Species Diversity ◽  
Mixed Forest ◽  
Woody Species ◽  
Physical Characteristics ◽  
Herbaceous Species ◽  
Regeneration Status ◽  
Soil Physical Characteristics ◽  
Temperate Mixed Forest

scholarly journals Effect of exclosure on dryland woody species restoration in northeastern Amhara, Ethiopia

2020 ◽  
Author(s):  
Mubarek Eshetie ◽  
Tsegaye Gobezie ◽  
Seid Muhie Dawd
Keyword(s):  
Species Diversity ◽  
Water Conservation ◽  
Diversity Index ◽  
Woody Species ◽  
Secondary Forests ◽  
Land Uses ◽  
Vegetation Diversity ◽  
Regeneration Status ◽  
Significant Difference ◽  
Woody Species Diversity

AbstractIn Ethiopia, among many restoration efforts to reverse deforestation and land degradation, area exclosure is one of the most common practices to restore secondary forests with assisted natural regeneration. The present study in the Sekota district, northeastern Amhara region, Ethiopia evaluated the influence of areas exclosures on woody species diversity, population structure and regeneration status. A total of 36 and 27 quadrats, each 20 m × 20 m, were used to collect data in exclosures and non-exclosures, respectively. Within quadrats, four 5 m × 5 m and 2 m × 2 m quadrats at the corners were used to sample saplings and seedlings, respectively. In exclosures, 35 woody species representing 21 families and 29 genera were recorded; 19 woody species representing 13 families and 13 genera were recorded in the non-exclosure. Acacia etbaica was the most dominant species in the two land-uses. The Shannon diversity index was 1.77 ± 0.46 in exclosures and 1.39 ± 0.46 in non-exclosures. Shannon and Simpson diversity indices showed a significant difference between the two land-uses (p < 0.01). The regeneration status of all wood species in exclosures was good, only fair in non-exclosures. Area exclosures have thus played a great role in the restoration of degraded lands by improving vegetation diversity and regeneration status. The least dominant woody species should be maintained through active restoration. Continuous follow-up, maintenance of soil water conservation structure to improve soil fertility will further help enhance the woody species diversity and abundance.

scholarly journals Woody Species Diversity, Structure, and Regeneration Status of Yemrehane Kirstos Church Forest of Lasta Woreda, North Wollo Zone, Amhara Region, Ethiopia

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Amanuel Ayanaw Abunie ◽  
Gemedo Dalle
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
Woody Species ◽  
Amhara Region ◽  
Regeneration Status ◽  
Wiener Diversity Index ◽  
Woody Species Diversity ◽  
Church Forest ◽  
North Wollo ◽  
Diversity Structure

This study is aimed at generating data on woody species diversity, structure, and regeneration status of some species and was conducted in Yemrehane Kirstos Church Forest of Lasta Woreda, North Wollo Zone, Amhara Region, Ethiopia. Six transect lines were laid following altitudinal gradient. Quadrats of size 20 m × 20 m (400m2) were used to collect data that were established systematically at every 100 m interval along the transect lines. Data on woody species was collected from a total of 34 sampling quadrats of 400m2. To collect data on seedlings and saplings, five subplots of 1 m × 1m (1m2) size located at the four corners and centre of the main plot were used. Species diversity was determined using the Shannon-Wiener index (H′). A total of 39 woody species belonging to 38 genera and 29 families were identified in Yemrehane Kirstos Church Forest. The overall Shannon-Wiener diversity index (H′) and evenness values for the entire forest were 2.88 and 0.79, respectively. The six most abundant woody species in their order of highest density were Juniperus procera, Olea europaea subsp. cuspidata, Maytenus arbutifolia, Osyris quadripartita, Calpurnia aurea, and Debregeasia saeneb. The densities for mature woody species, saplings, and seedlings were 506.6, 514.7, and 415.4 individuals ha−1, respectively. The basal area of the forest is 72 m2 ha−1. The population structure and regeneration status of the forest indicated that there have been high forest degradation and severe anthropogenic disturbances in the area and, therefore, conservation of species, ecosystem restoration, and sustainable use of the forest genetic resources are recommended as a result of this study.

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.

scholarly journals Effects of Piliostigma reticulatum on the Vegetation Dynamic in Sudanian Zone of Burkina Faso

2017 ◽  
Vol 6 (2) ◽  
pp. 77 ◽  
Author(s):  
Yelemou Barthelemy ◽  
Abdoulaye Tyano ◽  
Babou Andre Bationo ◽  
Bassiaka Ouattara ◽  
Jonas Koala ◽  
...  
Keyword(s):  
Species Diversity ◽  
Burkina Faso ◽  
Woody Species ◽  
Herbaceous Species ◽  
Vegetation Dynamic ◽  
Quadrat Method ◽  
Shrub Canopy ◽  
Point Quadrat ◽  
Sudanian Zone ◽  
Vegetation Regeneration

This study aims at identifying the effect of P. reticulatum on the vegetation regeneration dynamic in Sudanian fallows of Burkina Faso. Two fallows of about twenty years old have been considered. The point quadrat method was used for herbaceous inventory. Aboveground biomass has been estimated. Moreover, effect of P. reticulatum on the regeneration of others woody species has been studied under, at the limit and out of the shrub canopy. In north Sudanian zone, inventory recorded 39 herbaceous species of which 23 species under the canopy and 16 in open grassland, distributed in 12 families and 22 genera. In south Sudanian zone, species diversity is 41 species from which 23 under the canopy and 18 out of, spread in 16 families and 26 genera. Species higher than 80 cm have been observed only under P. reticulatum canopy in south and north Sudanian zone. In addition, no species of striga met in open sunlight has been observed under the shrub canopy. East and West directions recorded the important proportions of species with individuals belonging to the stratum superior to 100 cm (3.13 and 4.81 % in north direction, 1.47 and 1.73% in south directions). 

Regeneration Success and Plant Species Diversity of Allegheny Hardwood Stands After Roundup Application and Shelterwood Cutting

1994 ◽  
Vol 11 (4) ◽  
pp. 109-116 ◽  
Author(s):  
Stephen B. Horsley
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Plant Species ◽  
Negative Impact ◽  
Woody Species ◽  
Diversity Indices ◽  
Species Group ◽  
Plant Species Diversity ◽  
Herbaceous Species ◽  
Species Groups

Abstract The presence of desirable regeneration and plant species diversity was studied in five Allegheny hardwood stands before and for 7 yr after application of Roundup herbicide and shelterwood cutting to remove interfering understories of hayscented and New York fern, striped maple, and beech and to establish desirable hardwood regeneration. In each of five 20 ac stands, 10 ac were sprayed with 1 lb ai (active ingredient)/ac of Roundup in August 1979; the remaining 10 ac were unsprayed. The entire 20 ac stand received a shelterwood seed cut the following winter. On treated plots, fern was reduced from 57% stocking before treatment to 7% 1 yr after treatment; striped maple and beech stocking was reduced by 16% during the same time. By the fourth year after treatment, regeneration stocking of desirable hardwood species had doubled on treated plots but remained unchanged on untreated control plots. Species diversity was measured by species richness, three diversity indices--Berger-Parker, Margalef and Shannon, and index-free diversity ordering. Neither the herbicide treatment nor the shelterwood seed cut had a statistically significant effect on species richness of either woody species or herbaceous species groups. Nor was there a significant effect of treatments on woody species diversity as measured by the three diversity indices. Index-free diversity ordering showed. (1) a trend toward increase in less common species on Roundup-treated areas, and (2) the diversity of herbaceous species groups was higher in all 7 yr after treatment with Roundup. Values of the three diversity indices were higher for herbaceous species on Roundup-treated subplots for 2 to 7 yr after treatment. Much of this increase resulted from germination of seed bank grasses, sedges, and Rubus spp. With the qualification that long-term and current browsing by deer has impoverished the flora of the Allegheny hardwood forest, diminishing potential treatment effects, the study demonstrated that Roundup treatment aided desirable regeneration establishment, did not have a negative impact on woody species or herbaceous species group diversity, and may have increased diversity of herbaceous species. North. J. Appl. For. 11(4): 109-116.

scholarly journals Fuelwood Harvest and No Harvest Effects on Forest Composition, Structure, and Diversity of Arasbaran Forests—A Case Study

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1631
Author(s):  
Sajad Ghanbari ◽  
Christel C. Kern
Keyword(s):  
Species Diversity ◽  
Tree Height ◽  
Woody Species ◽  
Forest Composition ◽  
Stem Density ◽  
Regeneration Status ◽  
Composition And Structure ◽  
Composition Structure ◽  
The Impact

The impact of fuelwood harvesting on forest structure and composition is not clear, especially on the understudied and scarce Arasbaran forests in Iran. This research compared woody species density, species diversity, forest composition, and regeneration status in areas of continuous and ceased fuelwood harvesting in Arasbaran forests. We expected fuelwood harvesting to decrease stem density, species diversity, tree size (diameter at the breast height (DBH) and height), and shift composition away from preferred fuelwood species. We measured woody species size and frequency and identified species in three fuelwood harvest and three no harvest sites, with six sample plots (100 m × 50 m) per site. Results tended to show differences in composition, diversity, woody species height, and density. Carpinus orientalis, a preferred fuelwood species, tended to be more dominant in no harvest (importance values index (IVI) = 173.4) than harvest areas (IVI = 4.4). The diversity or richness of woody species tended to be higher in harvest (20 ± 1 species per ha) than in no harvest (14 ± 2 species per ha) areas, and other measures of diversity supported this trend as well. Harvest areas tended to also be characterized by shorter tree height and lower density of trees, a higher density of regeneration, and fewer small pole-sized trees than no harvest areas. Ongoing fuelwood harvests may further shift composition and structure away from no harvest area, compromising future fuelwood availability, but further detailed research is needed. Close to nature practices may be useful in sustaining fuelwood harvest areas and diversifying areas where fuelwood harvesting has ceased.

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