Potential of exclosure on aboveground biomass carbon stock and ecological fitness of woody species in Jabi Tehnane district, northwestern Ethiopia

Melkamu Terefe Asmare,Abdella Gure

doi:10.1080/20964129.2019.1585208

Melkamu Terefe Asmare, Abdella Gure

Open Access

https://doi.org/10.1080/20964129.2019.1585208

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Abstract

ABSTRACT Assessment of ecological fitness of woody species across land use is critical issues in degraded land restoration. However, little is known about AGBC stored capacity, important value and distribution index of woody species grows in exclosure and adjacent open lands. Therefore, this research is aimed to (i) analyse impact of exclosure on AGBC (ii) ecological fit species. A random sampling method was employed. Forty sample plots (50m*50m) were used. AGBC stocks (mean± SE) of woody species in adjacent open grazing and exclosure land use of GW site was 0.11±0.07 and 1.24±0.27Mg ha-1 respectively. While in adjacent open grazing and exclosure land use of WG site, the value was 0.27±0.03 and 2.79±0.27Mgha-1 respectively. In both site exclosure land uses, the proportion of rare, occasional and common woody species were better than their adjacent open grazing land. Cupressus lustanica from open grazing and Vernonia auriculifera from exclosure land use of WG as well as Croton macrostachyus from open grazing and Leucaena leucocephala from exclosure land use of GW site were recorded as top ecologically fit species. It is recommended to protect degraded lands via integrating ecologically adapted native species and fully used their diversity to achieve the potential benefits of land restoration.

Highlights

Assessment of aboveground biomass of species grown in different land use is a critical issue in biodiversity conservation (Vashum and Jayakumar 2012)
In estimating aboveground biomass through using allometeric equation woody basic density, height, DBH (Diameter at Breast Height), and DSH (Diameter at Stump Height) were widely used variables. Because these traits were varying among species, forest types, age, and soil fertility (Chave et al 2005),the level of aboveground biomass carbon stock in species depends on the species type, ages of land use, site, allometeric equation used, and agroecology (Henry et al 2009; Chave et al 2005)
In the Keble, there was one exclosure known by the name Wega Guanaesa which is found on altitudinal range of 2000–2300 m.a.s.l

Summary

Introduction

Assessment of aboveground biomass of species grown in different land use (exclosure and open grazing land) is a critical issue in biodiversity conservation (Vashum and Jayakumar 2012). This is because it provides information on productivity and sustainability of forest, amount of carbon to be stored in a species and emitted from species due to deforestation. In estimating aboveground biomass through using allometeric equation woody basic density, height, DBH (Diameter at Breast Height), and DSH (Diameter at Stump Height) were widely used variables Because these traits were varying among species, forest types, age, and soil fertility (Chave et al 2005),the level of aboveground biomass carbon stock in species depends on the species type, ages of land use, site, allometeric equation used, and agroecology (Henry et al 2009; Chave et al 2005)

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