A study to identify the relative dominance and density of tree population

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A study to identify the relative dominance and density of tree population

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Abstract This study investigates the structure, species composition, and diversity of a section of the Kilengwe Forest in Tanzania. The most important families and species were determined using importance value indices at the respective taxonomic levels.

Diversity was measured using the Shannon-Wiener and Fisher alpha diversity indices. Fabaceae and Julbernadia globiflora were the dominant family and species, respectively. Seventy-eight percent of the total species were rare.

The average basal area of the forest was 7. The Shannon-Wiener index 4. The species-area and species-abundance curves revealed an escalating trend implying that more sampling efforts could result in a higher number of species existing in the forest.

The study suggests the necessity for anthropogenic disturbance control as this is the major source of forest degradation in the studied area. Local communities living nearby depend on these forests for their livelihoods. For instance, forest trees provide resources like food, traditional medicine, energy, timber, shade, and habitats for other organisms [ 2 ].

The rapid increase in human population near forest ecosystems has increased threats of degradation and fragmentation to these ecosystems [ 3 ].

In Tanzania, the rate of population increase per year is 2. The loss is mainly due to agricultural clearings, overgrazing, charcoaling, firewood, and timber harvesting [ 34 ].

Like other tropical forests in the world, the Kilengwe Forest suffers extensive loss and degradation from anthropogenic activities and sporadic fire, which have a strong effect on the structure and species composition of the forest [ 5 ].

The quantification of the structure and diversity of tree species is important since they provide resources and habitat for a number of other species. Being the dominant life form in forests, trees are easy to locate specifically and count [ 6 ] and are comparatively better known from a taxonomic perspective [ 7 ].

Understanding tree composition and structure of forest is a vital instrument in assessing the sustainability of the forest, species conservation, and management of forest ecosystems. At the current study area, a few unpublished inventories have been recorded. Thus, the objectives of this study are to i identify inventory tree species composition and richness in Kilengwe Forest and compare them with other forests, locally and worldwide, and ii examine forest structure and composition patterns in the forest in terms of density, basal area, and size class distribution.

A study to identify the relative dominance and density of tree population

Material and Methods 2. It is owned by local government and surrounded by the villages of Kilengwe and Zongomero. A number of seasonal streams that provide water to the local community for domestic purpose originate from the forest reserve.

The climate of the region is oceanic due to proximity about km to the Indian Ocean and the rainfall regime is bimodal. The long rains last from March to May peaking in April while the short rains last from October to December.

The mean annual rainfall and temperature in the Morogoro region are about mm and Agriculture is the major socioeconomic activity carried out by locals living in the two neighboring villages.

Trees with multiple stems at 1. If a tree had buttresses or abnormalities at 1. The tree density was calculated using the number of individuals divided by sample area while the basal area was equal to 0.A Study to Identify the Relative Dominance and Density of Tree Population PAGES 1.

WORDS View Full Essay. More essays like this: tree population, plant life survey, book of trees, pine trees. Not sure what I'd do without @Kibin - Alfredo Alvarez, student @ Miami University.

Exactly what I needed. DENSITY AND PERCENT COVER Sampling Sometimes it is too time-consuming, expensive, or even impossible to collect data from To estimate population size or relative importance of invasive and other species in a study area.

Background study area is less than 99 paces, you will need a random number between 00 and If. Dominance and Diversity Dominance •Dominant – most conspicuous and abundant species •Dominance – relative importance of a species related to degree of influence it has on ecosystem components at dominant species – Frequency, density, biomass, cover Determinates of Diversity.

Thus, the objectives of this study are to (i) identify inventory tree species composition and richness in Kilengwe Forest and compare them with other forests, locally and worldwide, and (ii) examine forest structure and composition patterns in the forest in terms of density.

The relative dominance hypothesis explains interaction dynamics in mixed species Alnus rubra / Interaction indices reflecting the size of a tree relative to the population were the best study varied in agreement with the relative dominance hypothesis for both species and on all sites.

Results from other studies suggest that the. However, once P. menziesii had attained a dominant canopy position (years 43–68, Fig. 1c), size relative to the population became a better predictor of relative growth rates, with all of the best models using relative dominance interaction indices.

species abundances