scholarly journals Effects of coffee management intensification in natural forests on woody species diversity and structure in Yayo district, south western Ethiopia

2019 ◽  
Vol 7 (03) ◽  
Author(s):  
Fikiru I. Gamachu ◽  
Tefera Jegora
Keyword(s):  
Species Diversity ◽  
Woody Species ◽  
Home Garden ◽  
Natural Forests ◽  
Importance Value ◽  
Southwestern Ethiopia ◽  
Woody Species Diversity ◽  
The Difference ◽  
Total Species ◽  
Western Ethiopia

This study was conducted to evaluate the difference between woody species diversity, structure and similarity in natural forests and adjacent coffee farms in Yayo district, southwestern Ethiopia. Vegetation data were collected from both land use systems using transects walk lines. The Shannon, Simpson’s, similarity and importance values index were analyzed using SPSS version 20 software. The result revealed 64 woody species belongs to 31 families from both land uses. Moraceae had the most diverse family having each 5 and 8 species in coffee farms and natural forests respectively. The species richness was higher in natural forests (54) than coffee farms (38). Coffea arabica (42.85%) and Celtis africana (21.14%) those frequently occurred had the highest importance value indices in coffee farms and natural forests respectively. Of total species recorded, 28 (43.75%) are common, 26 (40.63%) and 10 (15.62%) were unique to natural forests and coffee farms respectively. The highest number of woody plants per hectare were distributed in diameter at breast height 5-10cm having 1250 ha−1 (64.10%) in natural forests and 471 ha−1 (72.33 %) in coffee farms. The total basal areas were 364.44 and 669.84 m2 ha−1 in coffee farms and natural forests respectively. The result indicated that planting coffee in natural forests with intensified management system causes significant differences on the overall woody species diversity i.e. the structure, composition and regeneration rates of the forest. Therefore, it is recommended to plant coffees in home garden and open lands with planting multipurpose shade trees rather than cultivating it in natural forests.

scholarly journals Woody species diversity from proposed ecologically sensitive area of northern Western Ghats: implications for biodiversity management

2020 ◽  
Vol 12 (9) ◽  
pp. 16048-16063
Author(s):  
M. Tadwalkar ◽  
A. Joglekar ◽  
Monali Mhaskar ◽  
A. Patwardhan
Keyword(s):  
Species Diversity ◽  
Tropical Forests ◽  
Western Ghats ◽  
Stand Structure ◽  
Woody Species ◽  
Importance Value ◽  
Threatened Plant Species ◽  
Western Ghats Of India ◽  
Woody Species Diversity ◽  
The Western Ghats

The Western Ghats of India support an array of tropical forests ranging from wet evergreen to scrub formations.  Several endemic and threatened plant species are located in areas other than protected areas (PAs).  There is an urgent need to understand species diversity in areas other than PAs, for effective management of tropical forests.  In this context, reserve forests and informal PAs of Amboli from northern Western Ghats have been investigated. Woody species composition, diversity, and stand structure were assessed by laying quadrats and transects (n=46, area=2.575ha) in closed and open canopy forest patches covering habitat heterogeneity and environmental gradient of the area. A total of 2,224 individuals (of 87 species, 68 genera, and 35 families) was enumerated.  Memecylon umbellatum, Syzygium cumini, and Diospyros nigrescens were found to be the most dominant species as per importance value index.  Melastomataceae was the most dominant family as per family importance value, whereas Euphorbiaceae and Rutaceae were the most speciose.  Fourteen IUCN Red List assessed species and 18 species endemic to the Western Ghats were encountered.  Endemic species accounted for nearly 20% of the total number of individuals sampled.  Demographic profile exhibited reverse ‘J’ pattern.  Average basal area was 27.02m2 per hectare. Woody species diversity of Amboli forests was found comparable with other PAs from northern Western Ghats.  Amboli and the adjoining area have been proposed as ecologically sensitive and in the wake of anthropogenic and developmental pressures they experience, it calls for urgent conservation attention.

scholarly journals Role of Indigenous Dryland Agroforestry System for Biodiversity Conservation and Carbon Storage in Tigray, Northern Ethiopia

2019 ◽  
Author(s):  
Ashenafi Manaye ◽  
Berihu Tesfamariam ◽  
Musse Tesfaye ◽  
Adefires Werku ◽  
Yirga Gufi
Keyword(s):  
Climate Change ◽  
Species Diversity ◽  
Biodiversity Conservation ◽  
Climate Change Mitigation ◽  
Woody Species ◽  
Home Garden ◽  
Total Biomass ◽  
Woody Species Diversity ◽  
Soc Stock ◽  
Change Mitigation

Abstract Background : Agroforestry (AF) is an age-old practice in the farming system of Ethiopian dry lands. So far, several studies conducted in the field of AF focused on system design, soil fertility management and system interactions. Less emphasis has been given to the biodiversity and climate change mitigation aspects. The objective of this paper was to evaluate the woody species diversity, biomass carbon (C) and soil organic carbon (SOC) stock of the dry land indigenous AF practices. A total of 197 smallholder farmers representing four AF practices were systematically selected from three agroecologies. Woody species inventory was done on the randomly established plot of each farm. Results : A total of 59 species, belonging to 48 genera and 32 families were recorded. Shannon diversity index (H’) of highland agroecology was higher in-home garden AF while in the midland and lowland the higher H’ was recorded in parkland AF. Smallholding ecosystem C stocks (sum of total biomass C and SOC 0 –60 cm) ranged from 77 to 135 Mg ha−1.The mean total biomass C stock of woodlot AF practice (31 Mg C ha-1) was significantly higher than the other three AF practices. SOC stocks (0–60 cm) were greater in boundary planting (113 Mg C ha-1) followed by the home garden (109 Mg C ha-1) and woodlot (97 Mg C ha-1) AF practices. Conclusions : The woody species diversity of highland agroecology was higher in-home garden AF while in the midland and lowland the higher species diversity was recorded in parkland AF. As compared to other AF systems, our study revealed that rotational woodlot and boundary planting AF practice accounts higher biomass and SOC stock, respectively. Finally, our work concluded that indigenous AF system is a win-win solution to address the biodiversity conservation and climate change mitigation of the dryland ecosystem.

Woody species diversity and coffee production in remnant semi-natural dry Afromontane Forest in Zegie Peninsula, Ethiopia

2018 ◽  
Vol 93 (5) ◽  
pp. 1793-1806 ◽  
Author(s):  
Beyene Belay ◽  
Solomon Zewdie ◽  
Wolde Mekuria ◽  
Abrham Abiyu ◽  
Dagninet Amare ◽  
...  
Keyword(s):  
Species Diversity ◽  
Woody Species ◽  
Coffee Production ◽  
Afromontane Forest ◽  
Woody Species Diversity ◽  
Dry Afromontane Forest

scholarly journals Assessment of species diversity and distribution of woody species on selected plots in Olokemeji Forest Reserve, Ogun State, Nigeria

2021 ◽  
Vol 22 (3) ◽  
pp. 43-50
Author(s):  
D.M. Taiwo ◽  
S.I. Udoh ◽  
S.O. Olaoti-Laaro ◽  
O.R. Jeminiwa ◽  
M.S. Jeminiwa
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Woody Species ◽  
Tectona Grandis ◽  
Importance Value ◽  
Forest Reserve ◽  
Lowland Rain Forest ◽  
Ogun State ◽  
The Status ◽  
And Function

The Assessment of forest species composition and species diversity is essential in understanding the status of tree population and diversity for conservation purpose. Olokemeji forest reserve is situated in the lowland rain  forest of south-western Nigeria and it occupies a total land area of 58.88 km2 . Six study plots of 50m2 each were randomly selected and designated as Frequently Burnt Plot 1, Frequently Burnt Plot 2, Harvested Plot, Unharvested Unburnt Plot, Arable Plot 1 and Arable Plot 2 for the purpose of assessment of species diversity and distribution of woody species. Seven species of trees were identified belonging to five families. One hundred and eighty two stands were enumerated, with Unharvested Unburnt Plot having the highest number of trees at 50. The dominance index for the woody flora was 1 in Frequently Burnt Plot 1 and 2 as well as Arable Plot 1 and 2 except for the Harvested Plot that had the lowest (0.29) while the Unharvested Unburnt Plot had 0.75. Highest species richness was recorded at the Harvested Plot at 0.71. The species diversity in Harvested Plot was low (1.54), while it was extremely low in Unharvested Unburnt Plot (0.43). Evenness index was lowest in the Unharvested Unburnt Plot at 0.43. Tectona grandis had the highest relative importance value in the Frequently Burnt Plot 1. The low species richness and species diversity is a direct indication of anthropogenic interference in the study plots and the forest reserve; this requires urgent mitigation to prevent a total loss of its structure and function as expected of a forest reserve. Keywords: Species, Diversity, Evenness, Anthropogenic, Forest, Dynamics

scholarly journals The Use of Homegarden Agroforestry Systems for Climate Change Mitigation in Lowlands of Southern Tigray, Northern Ethiopia

2019 ◽  
pp. 1-13
Author(s):  
Gebru Eyasu Siyum ◽  
Tuemay Tassew
Keyword(s):  
Climate Change ◽  
Species Diversity ◽  
Climate Change Mitigation ◽  
Woody Species ◽  
Agroforestry Systems ◽  
Carbon Stocks ◽  
Land Uses ◽  
Woody Species Diversity ◽  
Soil Carbon Stocks ◽  
Change Mitigation

Mitigation of climate change is one of the major environmental challenges facing the globe. In this context, homegarden agroforestry systems (HGAFs) have large potential for climate change mitigation. Therefore, this study was initiated to estimate the biomass and soil carbon stocks of HGAFs in relation to adjacent Natural Forest (NF). It also analyzed the relationship between woody species diversity, evenness and richness with biomass and soil carbon stocks. Three sites were purposely selected on the basis of the presence of HGAFs and NF adjacent to each other. Random sampling was used to select representative homegardens from the study population. In NF, a systematic sampling technique was employed. A total of 60 plots with a size of 10 m x 20 m were used to collect vegetation and soil data in both land uses. Soil samples were collected from each plot of the samples laid for vegetation sampling. Accordingly, 120 composite and 120 undisturbed soil samples from 0-30 cm and 30-60 cm soil depths were collected for soil organic carbon (SOC) and bulk density analysis respectively. Biomass estimation for each woody species was analyzed by using appropriate allometric equations. The result showed that the total amount of carbon stocks was 148.32±35.76 tons ha-1 and 157.27±51.61 tons ha-1 in HGAFs and adjacent NF respectively which did not vary significantly between the two studied land uses (P > 0.05). The finding also shows a positive but non-significant (P>0.05) relationship between carbon stocks and woody species diversity, richness, and evenness. Specifically, in NF lands, woody species diversity with SOC (r=0.36) and in HGAFs species richness with biomass carbon (r=0.39) was correlated positively and significantly (P=0.05). We concluded that HGAFs have the same potential as the NF for carbon stock accumulation and to counteract the loss of biomass.

Sign in / Sign up

Export Citation Format

Share Document