scholarly journals Temporal Changes in Tree Species Composition in Karsog Area of Northwest Himalaya

2021 ◽  
Vol 12 (1-2) ◽  
Author(s):  
Harish Bharti
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Mixed Forest ◽  
Tree Density ◽  
Forest Communities ◽  
Pinus Roxburghii ◽  
Tree Species Composition ◽  
Forest Division ◽  
Abies Pindrow ◽  
Quercus Leucotrichophora

ABSTRACT The forests of Karsog Forest Division in Himachal Pradesh were temporally analyzed for change in tree species composition. These are based on the species composition in different communities and variations along the different altitudinal gradients. The enumeration records were procured from the forest department. Total 143 forest compartments were analyzed to study the change in tree species in thirteen delineated communities, out of which six were pure forest communities and seven were mixed forest communities. The change in density (Ind/ ha) in tree species was calculated between two enumeration years, that is 1986and 2013. Results showed that out of thirteen communities, only three pure communities viz., Pinus roxburghii, Abies pindrow and Quercus leucotrichophora showed increased density while other pure communities showed decreased density in two enumeration years. Altitudinal based study revealed that the lowest altitudinal gradient (1000-2000 m) showed increase in tree density while in 2000-3000 m zone a gradual fall in tree density was observed temporally.

Langfristige Entwicklung von zwei Waldgesellschaften im Białowieża-Urwald

2008 ◽  
Vol 159 (4) ◽  
pp. 80-90 ◽  
Author(s):  
Bogdan Brzeziecki ◽  
Feliks Eugeniusz Bernadzki
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Stand Structure ◽  
Temporal Dynamics ◽  
Structural Parameters ◽  
Forest Communities ◽  
Natural Forests ◽  
Tree Species Composition ◽  
Strong Trend ◽  
Long Term Study

The results of a long-term study on the natural forest dynamics of two forest communities on one sample plot within the Białowieża National Park in Poland are presented. The two investigated forest communities consist of the Pino-Quercetum and the Tilio-Carpinetum type with the major tree species Pinus sylvestris, Picea abies, Betula sp., Quercus robur, Tilia cordata and Carpinus betulus. The results reveal strong temporal dynamics of both forest communities since 1936 in terms of tree species composition and of general stand structure. The four major tree species Scots pine, birch, English oak and Norway spruce, which were dominant until 1936, have gradually been replaced by lime and hornbeam. At the same time, the analysis of structural parameters indicates a strong trend towards a homogenization of the vertical stand structure. Possible causes for these dynamics may be changes in sylviculture, climate change and atmospheric deposition. Based on the altered tree species composition it can be concluded that a simple ≪copying≫ (mimicking) of the processes taking place in natural forests may not guarantee the conservation of the multifunctional character of the respective forests.

Carbon exchange in a hemiboreal mixed forest in relation to tree species composition

2019 ◽  
Vol 275 ◽  
pp. 11-23 ◽  
Author(s):  
Alisa Krasnova ◽  
Mai Kukumägi ◽  
Ülo Mander ◽  
Raili Torga ◽  
Dmitrii Krasnov ◽  
...  
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Mixed Forest ◽  
Carbon Exchange ◽  
Tree Species Composition

scholarly journals The development of tree species composition of the species-rich natural forest during the last 33 years

Beskydy ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 9-16
Author(s):  
Miroslav Balanda ◽  
M. Saniga ◽  
J. Pittner
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Mixed Forest ◽  
European Beech ◽  
Acer Pseudoplatanus ◽  
Large Wood ◽  
Tree Species Composition ◽  
Dominant Position ◽  
Oak Trees ◽  
Tree Layer

The presented study is aimed on the analysis of inventory data from the old-growth mixed forest of National Nature Reserve (NNR) Sitno. A special attention was paid to the temporal variation of the tree species composition. Study analyzes data acquired in the decadal periodic inventory campaigns during the last 33 years. Analysis of dynamic changes in portion of partial tree species in NNR Sitno revealed the significant continuous decrease of oak trees during analyzed period. Evaluation of temporal changes showed the significant decrease of oaks regarding the number of trees thicker than 8 cm (8 %) as well as the volume of large wood (11 %). On the other hand, the European beech is achieving the dominant position within the upper tree layer on the behalf of oaks and other tree species. Inventory revealed slight decrease of beech in term number of tree individuals that is connected with significant increase of the large wood volume. We recorded the increasing abundance of maples (Acer pseudoplatanus, Acer platanoides) and common ash in the natural regeneration.

scholarly journals Tree Species Composition and Regeneration Status of Shitalpur Forest Beat under Chittagong North Forest Division, Bangladesh

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Asadozzaman Nur ◽  
Rajasree Nandi ◽  
Mohammed Jashimuddin ◽  
Mohammed Akhter Hossain
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Basal Area ◽  
Stem Density ◽  
Tree Species Composition ◽  
Regeneration Status ◽  
Forest Division ◽  
Toona Ciliata ◽  
Favorable Conditions ◽  
Changes Over Time

Biodiversity erosion particularly in developing countries is a matter of great concern to the global ecological community. Species composition and regeneration indicate the health of forest. This study explored tree species composition and regeneration of natural hill forest of Shitalpur under Chittagong North Forest Division through 27 sample plots of 20 m × 20 m for trees and 2 m × 2 m for regeneration. A total of 47 tree species belonging to 29 families and 17 regenerating species belonging to 15 families were recorded. The tree stem density, basal area, and wood volume were 0.49 m2/ha, 1425 stem/ha, and 189.9 m3/ha, respectively. Mean regeneration was significantly higher in bottom hill (14374 seedlings/ha) compared to top hill (9671 seedlings/ha). Toona ciliata was highest (4444 seedlings/ha) at the bottom hill compared to other hill positions. The result shows that only 36% of the tree species (17 out of 47) are regenerating in the study area, meaning majority of the tree species (64%) are not getting favorable conditions to regenerate. This might be due to absence of mature tree species as a result of overexploitation by local people. The findings may help in monitoring the species composition changes over time and adopting specific conservation programs for Shitalpur Forest.

Effects of nitrogen deposition on nitrate leaching from forests of the northeastern United States will change with tree species composition

2017 ◽  
Vol 47 (8) ◽  
pp. 997-1009 ◽  
Author(s):  
Katherine F. Crowley ◽  
Gary M. Lovett
Keyword(s):  
United States ◽  
Species Composition ◽  
Nitrate Leaching ◽  
Tree Species ◽  
N Deposition ◽  
Red Oak ◽  
Northeastern United States ◽  
Tree Species Composition ◽  
White Ash ◽  
Species Change

As tree species composition in forests of the northeastern United States changes due to invasive forest pests, climate change, or other stressors, the extent to which forests will retain or release N from atmospheric deposition remains uncertain. We used a species-specific, dynamic forest ecosystem model (Spe-CN) to investigate how nitrate (NO3–) leaching may vary among stands dominated by different species, receiving varied atmospheric N inputs, or undergoing species change due to an invasive forest pest (emerald ash borer; EAB). In model simulations, NO3– leaching varied widely among stands dominated by 12 northeastern North American tree species. Nitrate leaching increased with N deposition or forest age, generally with greater magnitude for deciduous (except red oak) than coniferous species. Species with lowest baseline leaching rates (e.g., red spruce, eastern hemlock, red oak) showed threshold responses to N deposition. EAB effects on leaching depended on the species replacing white ash: after 100 years, predicted leaching increased 73% if sugar maple replaced ash but decreased 55% if red oak replaced ash. This analysis suggests that the effects of tree species change on NO3– leaching over time may be large and variable and should be incorporated into predictions of effects of N deposition on leaching from forested landscapes.

scholarly journals Differences of tree species composition and microclimate between a mahogany(swietenia macrophyllaking) plantation and a secondary forest in Mt. Makiling, Philippines

2006 ◽  
Vol 2 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Yong Kwon Lee ◽  
Don Koo Lee ◽  
Su‐Young Woo ◽  
Emmanuel Rodantes G. Abraham ◽  
Wilfredo M. Carandang ◽  
...  
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Secondary Forest ◽  
Tree Species Composition

scholarly journals TIMBER-FRAME STRUCTURE AND TREE SPECIES COMPOSITION OF A FARMHOUSE IN IIYAMA, IN THE CENTRAL JAPANESE SNOWBELT

2010 ◽  
Vol 16 (32) ◽  
pp. 387-392 ◽  
Author(s):  
Takahiro SHOJI ◽  
Hideyuki IDA ◽  
Toshikazu TSUCHIMOTO ◽  
Shigeo HOYANO
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Frame Structure ◽  
Tree Species Composition ◽  
Timber Frame
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