Topic
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.
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TL;DR: Wang et al. as discussed by the authors measured the biomass, soil properties, pH value of runoff and groundwater in both unthinned and thinned Chinese fir plantations over a 5-year period (2-6 years after thinning).
Abstract: Acidic deposition, which is mainly caused by atmospheric pollution, is one of the global environmental problems. Thinning is an effective management to improve the tree productivity, reduce the wildfire risk and maintain a healthy forest. Since thinning may reduce the effect of acidic deposition, the effect of thinning on acidic deposition was estimated. The biomass, soil properties, pH value of runoff and groundwater in both unthinned and thinned Chinese fir plantations were measured and compared over a 5-year period (2–6 years after thinning). The results indicated that acidic deposition in the Huitong State Ecosystem Research Station was serious, and it got worse with time. Forest thinning resulted in a huge change in biomass and soil properties. During the 5-year monitoring period, biomasses of understory and litter, plant species richness, coverage of undergrowth plant layer were significantly higher in thinned site than in unthinned site. Moreover, higher soil fertility as well as lower amounts of runoff and groundwater were found in thinned site. It was suggested that thinning could improve the structure of forest, leading to restoring the effluent (runoff and groundwater) pH to the normal value.
2 citations
05 May 2021
TL;DR: In this article, the species diversity of the monoculture plantations of exotic species Acacia auriculiformis and Eucalyptus camadulensis compared to indigenous species Shorea robusta and Mangifera indica was studied.
Abstract: This study was undertaken to know the species diversity of the monoculture plantations of exotic species Acacia auriculiformis and Eucalyptus camadulensis compared to indigenous species Shorea robusta and Mangifera indica. There are 12 sample plots (size 36x36 m) were selected from the study area following the purposive random sampling. A total of 720 quadrats (12 plots x 10 quadrats x 6 seasons) were placed in the sample plots to collect the undergrowth vegetation data over two years of 2010-11 following summer, monsoon and winter season. The average value of Shannon-Wiener diversity index was 2.65±0.16 and 3.28±0.13 that of Simpson’s diversity index was 0.87±0.02 and 0.93±0.01 and that of Margalef’s diversity index was 7.34±0.77 and 10.43±0.52 collectively in all exotic and indigenous plots, respectively. This scenario depicts that the extent of species diversity was higher in indigenous tree species plots than in exotic tree plots and the flora of the study area was highly diversified. The Shorea plots were richer in species diversity out of the four species categories of sampling plots. The index values of three diversity indices were significantly different for the exotic and indigenous tree plots, excluding Eucalyptus and Mangifera species plots, which mean the undergrowth species diversity of Eucalyptus and Mangifera species plots, were not significantly different. Adequate awareness building programs need to conduct among the local community and Bangladesh Forest Department to understand environmental degradation, the importance of conservation management of indigenous ‘Sal’ forest and significance of plant diversity in the village forest for future generations.
2 citations
TL;DR: In this article, the authors studied the post-fire structure and seed-bearing capacity of tree stands, factors of surface medium (thickness of burnt duff, projective cover of herb and moss vegetation) as well as number, vitality, and age structure of self-seeded Scots pine (Pinus sylvestris L.) and accompanying small-leaved species in the Lower Selenga pine forest massif of the forest-steppe in Southwestern Transbaikalia.
Abstract: The paper presents the results of the studying of the parameters of post-fire structure and seed-bearing capacity of tree stands, factors of surface medium (thickness of burnt duff, projective cover of herb and moss vegetation) as well as number, vitality, and age structure of self-seeded Scots pine (Pinus sylvestris L.) and accompanying small-leaved species in the Lower Selenga pine forest massif of the forest-steppe in Southwestern Transbaikalia. The seed harvests were 1.5-2 times higher than in the geographically replacing forest types in the forest-steppe of West Siberia, and vitality of the undergrowth of the pine under the canopy of fire-affected stands was extremely low. It is shown that the pine reforests successfully on the fire-sites in the zone of insemination from the forest walls and on the thin fire-sites in the cowberry-rhododendron pine forests, where it is 2-3 times more abundant than in forest-steppe of the West Siberia. The reforestation is insufficient on the fire-sites in the bearberry-lichen pine forests.
2 citations
Journal Article•
TL;DR: In this paper, the carbon storage in the rubber forest ecological system is mainly made up of the soil, undergrowth vegetation, litter and tree layers, and the organic carbon of samples were indoor tested and analyzed.
Abstract: The carbon storage in the rubber forest ecological system is mainly made up of the soil,undergrowth vegetation,litter and tree layers.Samples from the soil layer(0 cm-20 cm,20 cm-40 cm,40 cm-60 cm,60 cm-80 cm,80 cm-100 cm),undergrowth vegetation layer,litter layer and tree(5,10,15,20,25 and 30 years old) layer of the rubber plantation in Danzhou of Hainan were investigated,and the organic carbon of samples were indoor tested and analyzed.It was preliminarily concluded that the carbon storage of rubber forest ecological system in Danzhou of Hainan was 851.3 t/hm2.The carbon storage of soil layer was 536.9 t/hm2 the carbon storage of tree layer(306.8 t/hm2)the carbon storage of litter layer(4.4 t/hm2) the carbon storage of undergrowth vegetation layer(3.2 t/hm2).The carbon storages in the rubber plantations of different tree ages changed approximately between 75.7 t/hm2 and 152.7 t/hm2,and showed an approximately double peak trend.
2 citations
21 Jul 2017
TL;DR: The habitat of proboscis monkeys in the area of IUPHHK-HT is obtained in the form of tree species, feed trees, sleeping trees, water, temperature and humidity and there are 21 species of trees and undergrowth found as a food source and also used as a sleeping tree.
Abstract: Proboscis monkey (Nasalis larvatus Wurmb) is a primate that included in the family of Cercopithecidae. Proboscis monkeys are rare and endemic animals of Borneo, they are protected species and classified in Appendix I of CITES with the conservation status are endangered by the IUCN. The area of IUPHHK-HT PT. Bina Silva Nusa and its surroundings are the habitat of the proboscis with the mean mangrove forests and peat bogs. The purposes of this research are to obtain data and information of the habitat of proboscis monkeys in the area of IUPHHK-HT in the form of tree species, feed trees, sleeping trees , water, temperature and humidity. The data collecting was limited on the location that discovers the groups of proboscis monkeys and the sleeping place of proboscis. The research method was using terraced path to investigate the species of trees and undergrowth as the habitat and the potential feed source tree and the tree of sleep. The Habitat of proboscis monkeys on the three type of forest relatively had good vegetation structure. There are 21 species of trees and undergrowth was found as a food source and also used as a sleeping tree. The preferred tree species are the white mangrove (rhizophora apiculata), dungun (Heritiera globosa), ubah (Syzygium spp), ketiau (Ganua motleyana) and undergrowth piai lasa (Acrostichum speciosum). Water was known the salinity average of 15,5 o / oo - 22,5 o / oo with mean of pH of 3,75 – 5,5. Results of research on air temperature of habitat of proboscis monkey ranged between 25,8 ° C to 33 °C and the humidity ranged from 71,67% to 81, 33%. Keywords: Feed Trees, Habitat of Proboscis Monkey, PT. Bina Silva Nusa, Sleeping Trees
2 citations