The Diversity and Diameter Growth Rate of Sprouting-Type Tree  in Bukit Pinang-Pinang Forest Permanent Plots

The process of forest regeneration can take place within a certain period of time. Sprouting is a form of strategy for in adapting to its environment for success in regenerating. The Research on the diversity and diameter growth rate of sprouting-type tree in Bukit Pinang-pinang forest permanent plots, West Sumatra was carried out from October 2012 to December 2016 in the forest of Bukit Pinang-Pinang, West Sumatra and Herbarium Department of Biology, Universitas Andalas, Padang. This research was conducted using a survey method by census. The parameters analyzed were plant species composition, Morishita Index, Mann-Whitney test, Regression and Correlation test as well as RDGR (Relative Diameter of Growth Rate). The result of experiment was found 40 species of trees sprouting type in forest permanent plot Bukit Pinang-Pinang. The pattern of sprouting type trees distribution in the study locations was found to have a clustered, random and uniform pattern. Relative Diameter Growth Rate (RDGR) of 40 sprouting types of trees in the Bukit Pinang-Pinang forest permanent plots ranged from 0.003 cm/cm/year to 0.0288 cm/cm/year. Altitude did not affect RDGR of an individual tree sprouting type for 31 years

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Characteristics of Bird Nestling Trees in the Padang State University, West Air Tawar, West Sumatera

BioScience ◽

10.24036/0202042106098-0-00 ◽

2020 ◽

Vol 4 (2) ◽

pp. 172

Author(s):

Febrinal Febrinal ◽

Fingki Alvia Chandra ◽

Rijal Satria ◽

Ramadhan Sumarmin

Keyword(s):

Growth Rate ◽

Data Collection ◽

Survey Method ◽

Type Model ◽

State University ◽

Architecture Model ◽

West Sumatra ◽

Canopy Type

The purpose of this research is to describe the characteristic of the tree as birds nesting at State University of Padang , West Air Tawar, West Sumatra. This research conducted on March 2019. Data collection was using survey method. The results showed that found 14 species of tree is using by birds to nesting. The characteristic of tree is preferable by birds to using for nesting are tree and pole growth rate, monopodium and simpodium branching type, with round, oval and fountain canopy type, model leeuwenberg, attims and corner architecture model.

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Changes of Tree Species Composition and Distribution Patterns in Mts. Jiri and Baegun, Republic of Korea over 15 Years

Forests ◽

10.3390/f11020186 ◽

2020 ◽

Vol 11 (2) ◽

pp. 186

Author(s):

Boknam Lee ◽

Juhan Park ◽

Hoontaek Lee ◽

Tae Kyung Kim ◽

Sunhee Cho ◽

...

Keyword(s):

Growth Rate ◽

South Korea ◽

Species Composition ◽

Tree Species ◽

Additive Models ◽

Annual Rainfall ◽

Permanent Plots ◽

Topographic Wetness Index ◽

Tree Species Composition ◽

Species Composition And Distribution

Long-term changes in the abundance and distribution of tree species in the temperate forests of South Korea remain poorly understood. We investigated the changes in tree species composition in temperate mountainous forests using survey data from 130 permanent plots (0.1 ha) from the past 15 years (1998–2012) distributed across Mts. Jiri and Baegun, South Korea. The tree communities showed positive net changes in terms of stand density, richness, diversity, and evenness. At the species level, the change in relative species composition has been mainly driven by species such as Quercus mongolica, Carpinus laxiflora, Quercus serrata, Quercus variabilis, Styrax japonicus, Lindera erythrocarpa, and Pinus densiflora. These changes were categorized into five groups representing gradual increase or decrease, establishment, extinction, or fluctuation in species populations. At the community level, the changes in species composition showed consistent and directional increases in the annual rate of change for the mean species traits, including stand prevalence, pole growth rate, adult growth rate, and adult stature. Based on additive models, topographic variables (elevation, latitude, longitude, slope, topographic wetness index, and curvature) were more strongly associated with the distribution of species diversity than climate variables (annual mean minimum and maximum temperatures, temperature seasonality, annual rainfall, rainfall seasonality). Elevation was the most significant driver, followed by latitude and longitude. This study reveals the dynamics of change in tree species composition and distribution along topographical and climate gradients in South Korea and contributes to a broader understanding of temperate forest ecosystems for the purpose of better forest management.

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Evaluation of distance-independent competition indices in predicting tree survival and diameter growth

Canadian Journal of Forest Research ◽

10.1139/cjfr-2018-0344 ◽

2019 ◽

Vol 49 (5) ◽

pp. 440-446 ◽

Cited By ~ 5

Author(s):

Shuaichao Sun ◽

Quang V. Cao ◽

Tianjian Cao

Keyword(s):

Loblolly Pine ◽

Relative Position ◽

Basal Area ◽

Diameter Ratio ◽

Cumulative Distribution ◽

Permanent Plots ◽

Diameter Growth ◽

Individual Tree ◽

Tree Survival ◽

Competition Indices

Competition indices play a significant role in modeling individual-tree growth and survival. In this study, six distance-independent competition indices were evaluated using 200 permanent plots of loblolly pine (Pinus taeda L.). The competition indices were classified into three families: (1) size ratios, which include diameter ratio and basal area ratio; (2) relative position indices, which include basal area of larger trees (BAL) and tree relative position based on the cumulative distribution function (CDF); and (3) partitioned stand density index and relative density. Results indicated that different families of competition indices were suitable for different tree survival or diameter growth prediction tasks. The diameter ratio was superior for predicting tree survival, whereas the relative position indices (BAL and CDF) performed best for predicting tree diameter growth, with CDF receiving the highest rank.

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Impact of competitor species composition on predicting diameter growth and survival rates of Douglas-fir trees in southwestern Oregon

Canadian Journal of Forest Research ◽

10.1139/x01-164 ◽

2001 ◽

Vol 31 (12) ◽

pp. 2237-2247 ◽

Cited By ~ 29

Author(s):

Felipe Bravo ◽

David W Hann ◽

Douglas A Maguire

Keyword(s):

Species Composition ◽

Survival Rates ◽

Basal Area ◽

Douglas Fir ◽

Diameter Growth ◽

Individual Tree ◽

Growth And Survival ◽

Probability Of Survival ◽

Hardwood Species ◽

Crown Structure

Mixed conifer and hardwood stands in southwestern Oregon were studied to explore the hypothesis that competition effects on individual-tree growth and survival will differ according to the species comprising the competition measure. Likewise, it was hypothesized that competition measures should extrapolate best if crown-based surrogates are given preference over diameter-based (basal area based) surrogates. Diameter growth and probability of survival were modeled for individual Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees growing in pure stands. Alternative models expressing one-sided and two-sided competition as a function of either basal area or crown structure were then applied to other plots in which Douglas-fir was mixed with other conifers and (or) hardwood species. Crown-based variables outperformed basal area based variables as surrogates for one-sided competition in both diameter growth and survival probability, regardless of species composition. In contrast, two-sided competition was best represented by total basal area of competing trees. Surrogates reflecting differences in crown morphology among species relate more closely to the mechanics of competition for light and, hence, facilitate extrapolation to species combinations for which no observations are available.

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Organic, integrated and conventional management in apple orchards: effect on plant species composition, richness and diversity

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201159050151 ◽

2011 ◽

Vol 59 (5) ◽

pp. 151-158 ◽

Cited By ~ 2

Author(s):

Zdeňka Lososová ◽

Michaela Kolářová ◽

Luděk Tyšer ◽

Samuel Lvončík

Keyword(s):

Species Composition ◽

Plant Species ◽

Native Species ◽

Vascular Plant ◽

Permanent Plots ◽

Plant Species Composition ◽

Apple Orchards ◽

Higher Plant ◽

Organic Management ◽

Spontaneous Vegetation

The study was conducted to assess the effect of conventional, integrated and organic management on differences in plant species composition, richness and diversity. The plants were studied in triads of orchards situated in three regions of the Czech Republic. Data about species occurrences were collected on 15 permanent plots in the tree rows and 15 plots between tree rows in each of the apple orchards during 2009. A total of 201 vascular plant species (127 native species, 65 archaeophytes, and 9 neophytes) were found. Management type and also different regional conditions had a significant effect on plant species composition and on diversity parameters of orchard spontaneous vegetation. Species richness and species pool was significantly higher in the organic orchards than in the differently managed orchards. Management type had significant effect on proportions of archaeophytes, and also neophytes in apple orchards. The results showed that a change from conventional to integrated and organic management in apple orchards lead to higher plant species diversity and to changes in plant species composition.

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Synergistic Effect of Dwarf Bamboo Flowering and Wild Boar Rooting on Forest Regeneration

Forests ◽

10.3390/f12091207 ◽

2021 ◽

Vol 12 (9) ◽

pp. 1207

Author(s):

Soyeon Cho ◽

Youngjin Kim ◽

Sangyeop Jung ◽

Yeonsook Choung

Keyword(s):

New Species ◽

Species Diversity ◽

Synergistic Effect ◽

Species Composition ◽

Wild Boar ◽

Forest Regeneration ◽

Tree Regeneration ◽

Permanent Plots ◽

Dwarf Bamboo

Sasa spp., monocarpic dwarf bamboos, are known to form recalcitrant understories, lower species diversity, and hinder forest development. Sasa borealis distributed throughout Korea showed a phenomenon of synchronized dieback after large-scale synchronized flowering nationwide around 2015. Therefore, we conducted this study to take advantage of the rare event and add prevailing activity of wild boars and culm removal to elucidate whether they promote the regeneration of a long-term suppressed forest. We set permanent plots in forests with different understory types, and tracked the vegetation change in 5 years with respect to species composition, tree regeneration, and S. borealis reestablishment. This study focused on comparison between plots established after mass flowering. In flowering stands, we found the species diversity increased significantly with increase in species evenness, but not with recruitment of new species. Furthermore, the seeds of mass-produced bamboo germinated, and the seedling abundance was found to increase considerably. In stands rooted by wild boar, species diversity increased through the recruitment of new species, including tree species. It increased the abundance of shrub and perennial herbs, while it suppressed the reestablishment of S. borealis. Although rooting effect was independently significant regardless of flowering, the synergistic effect of rooting and flowering on forest regeneration was outstanding. Wild boar seemed to function as a remover of dead culms and a breaker of remaining underground mats as well as a seed disperser. Consequently, the species composition became similar to the reference stands. However, culm cutting caused negative effects by facilitating S. borealis to re-occupy or resprout. Overall, as the wild boar population increases, the positive effect can be expected to enhance. At landscape scale, considering several factors such as flowering and non-flowering, and population size of wild boar, the long-term suppressed forests by S. borealis are projected to regenerate with mosaic forests.

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Deriving Tree Diameter Growth and Probability of Survival Equations from Successive Diameter Distributions

Forest Science ◽

10.1093/forestscience/54.1.31 ◽

2008 ◽

Vol 54 (1) ◽

pp. 31-35

Author(s):

Thomas G. Matney ◽

Emily B. Schultz

Keyword(s):

General Procedure ◽

Growth And Yield ◽

Diameter Distribution ◽

Diameter Growth ◽

Individual Tree ◽

Statistical Probability ◽

Growth And Survival ◽

Tree Diameter ◽

Growth And Yield Models ◽

Diameter Distributions

Abstract Many growth and yield models have used statistical probability distributions to estimate the diameter distribution of a stand at any age. Equations for approximating individual tree diameter growth and survival probabilities from dbh can be derived from these models. A general procedure for determining the functions is discussed and illustrated using a loblolly pine spacing study. The results from the spacing study show that it is possible to define tree diameter growth and survival probability functions from diameter distributions with an accuracy sufficient to obtain a link between the individual tree and diameter growth and yield models.

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