Undergrowth

About: Undergrowth is a research topic. Over the lifetime, 795 publications have been published within this topic receiving 11911 citations. The topic is also known as: understorey & underbrush.

Regeneration naturelle des especes ligneuses dans la foret de ngotto (republique centrafricaine)

Abstract: L’etude envisagee a pour objectif d’analyser le potentiel de la regeneration naturelle des especes ligneuses de la foret de Ngotto (Republique Centrafricaine). En considerant la regeneration naturelle comme la population de brins (juveniles) en sous-bois, les proportions d’essences juveniles ont ete evaluees pour chaque syntaxon (groupement) identifie au sein des synusies arbustive, sous-arbustive et herbacee haute. Il en ressort que la regeneration est en general pauvre le long des recentes pistes d’exploitation, dans les jeunes chablis et les zones dominees par les Marantaceae. En revanche, la regeneration est abondante le long des vieilles pistes d’exploitation et dans le sous-bois de foret «intacte». Mots-cles : Regeneration naturelle, foret tropicale, Republique Centrafricaine NATURAL REGENERATIONOFWOODYSPECIES INTHE FOREST NGOTTO (CENTRAL AFRICAN REPUBLIC) The proposed study aims to analyze the potential for natural regeneration of woody species in Ngotto forest (Central African Republic). Considering the natural regeneration as the population of strands (juveniles) in the undergrowth, the proportions of juvenile species were evaluated for each syntaxon (group) identified within synusiae shrub, sub-shrub and herbaceous high. It shows that regeneration is generally poor along the tracks recent operating in young Chablis and areas dominated by Marantaceae. There is an abundant regeneration along the old logging roads and in the forest undergrowth «intact». Keywords : Natural regeneration, rainforest, Central African Republic

[Community characteristics and canopy structure of pine-oak forest at the Lingkong Mountain in Shanxi, China].

Abstract: We conducted a field investigation at 400 10 m×10 m quadrats in a 4-hm2 plot of mixed forest dominated by pine (Pinus tabuliformis) and oak (Quercus wutaishanica), which was established in 2011 in the Lingkong Mountain of Shanxi Province, China. The community characteristics in the year of 2016 were analyzed. The digital hemisphere photograph (DHP) approach was employed to measure the canopy structure and the understory light parameters. The results showed that a total of 5558 individuals of trees of 25 species from 15 genera and 10 families were recorded. The canopy openness (CO) varied from 15.0% to 25.0%, the leaf area index (LAI) varied from 1.5 to 2.5, and the understory light parameters varied from 10.0% to 30.0%. The distribution of dominant species drove the canopy structure and the undergrowth light factors. The canopy structure defined the impacts of light factors in the forest. The leaf area index was more optimal in describing the canopy’s dynamic function. The canopy openness and leaf area index were negatively correlated to understory light availability, especially to the abundance of the incident rays of diffused light. Since the canopy structure was relatively uniform in the temperate pine-oak mixed forest, the understory light spots generally distributed in clusters. The tree species and canopy structure had significant effects on light environment in the forest.

The Influences of Closing for Afforestation on Vegetation Diversity Restoration under Chinese Fir Plantation

Abstract: By density control and 6 years' closed and non-closed management for Chinese fir pure stands,it was found that short-term closing had no significant influence on the overall performance of Chinese fir plantation,but remarkably affected the vegetation biodiversity and growth under forest.In closed area,there were 116 plant species belonging to 101 genera of 60 families,with the vegetation coverage 85%,while in the non-closed area,there were only 88 plant species belonging to 78 genera of 49 families,the vegetation coverage was about 60%.Furthermore,there existed a woody vegetation layer with the height2 m in closed area.The result of key trait value analysis showed that the relative density,relative coverage and some other important traits in closed area were higher than that in non-closed area.In closed area,Ficus hispida had the highest importance value: 100.43%,and other 16 species had the importance value no less than 35%,which occupied 13.79% of total undergrowth species.In non-closed area,Gelsemium elegans had the highest importance value(34.77%) and there were no species with importance value ≥35%.The dominance of undergrowth in closed area was more obvious than that in non-closed area.

Carbon Storage and Allocation in 26-Year-Old Phobe bournei and Cunninghamia lanceolata Plantations

Abstract: Carbon storage and component for the tree layer and undergrowth were compared between two 26-year-old plantations of broad-leaved species,Phobe bournei,and conifer species,Cunninghamia lanceolata(Chinese Fir),in Youxi, Fujian Province.The results showed carbon storage of tree layer was 61.7 t·hm-2 for Phobe bournei,which was lower than that of Cunninghamia lanceolata(72.7 t·hm-2);but the carbon storage of undergrowth was 1.5 t·hm-2 for Phobe bournei,which was higher than that of Cunninghamia lanceolata(1.0 t·hm-2).The carbon storage in Phobe bournei plantation accounted for 71.1% of Cunninghamia lanceolata plantation.However,stock volume of 26-year-old Phobe bournei plantation was still in a period of fast growth,high potential of carbon storage could be expected thereafter.