scholarly journals Community Characteristics and Coexistence of Four Medicinally Important Plants in Quercus Leucotrichophora A. Camus Forest of Central Himalaya, India.

2020 ◽  
Author(s):  
Poonam Prasad ◽  
Jeet Ram ◽  
Beena Tewari
Keyword(s):  
Species Richness ◽  
Keystone Species ◽  
Suitable Habitat ◽  
Origanum Vulgare ◽  
Importance Value Index ◽  
Importance Value ◽  
Chi Square ◽  
The People ◽  
Open Canopy ◽  
Quercus Leucotrichophora

Abstract Background: The Quercus leucotrichophora is a keystone species in maintaining the biodiversity of several other species and provides ecosystem service to the people residing around the forest. The present study is to investigate the community characteristic and coexistence of four medicinally important plants species viz. Boenninghausenia albiflora (Hk.) Reichb. ExMeissn. Hedychium spicatum (Ham. Ex Smith), Origanum vulgare (Linn.) and Rubia manjith (Linn.) in Quercus leucotrichophora forest in different canopies at three different sites i.e. Hanumangarh, Kailakhan and Pines in the Central Himalaya.Results: In the present study, a total of 81 herbaceous species encountered in the sample, out of which 41 species showed Importance Value Index (IVI) ≥ 5. About 50% species were common in different sites whereas about 54 % species were common in different canopies. There was variation in species richness among the sites (52-67 species), whereas, amongst the canopies, species richness was higher in open canopy and least in close canopy. The co-existence between the selected four species showed a frequency distribution <60% indicating their presence as rare, seldom or often. Amongst the sites, Boenninghausenia albiflora and Origanum vulgare showed its dominance in Pines, Hedychium spicatum at Kailakhan and Rubia manjith at Hanumangarh site. The coexistence between Origanum vulgare and other three species viz. Boenninghausenia albiflora, Rubia manjith and Hedychium spicatum showed negative values, while Boenninghausenia albiflora and two other species viz. Rubia manjith, Hedychium spicatum and Rubia manjith & Hedychium spicatum showed positive coefficient of association. The chi-square in both the cases indicated the values are non-significant resulting not a strong coexistence in the Oak forest, therefore their occurrence together in the community might be by chance. Conclusion: The growth of species in different habitat and association of medicinal plants is important in identifying the suitable habitat and canopy toward future multiplication of the different species in the Himalayan region. The finding of the present study would be also helpful to develop the structure and adequate strategy & plan for conservation and management of habitats, species and communities for their sustainable utilization in different part of the world.

scholarly journals Population distribution and habitat analysis of Rufous treepie (Dendrocitta vagabunda) in Abbottabad, Pakistan

2023 ◽  
Vol 83 ◽  
Author(s):  
R. A. Khan ◽  
Z. Ullah ◽  
I. Uz Zaman ◽  
M. S. Khan ◽  
S. Mahmood ◽  
...  
Keyword(s):  
Population Distribution ◽  
Suitable Habitat ◽  
Importance Value Index ◽  
Importance Value ◽  
Monthly Basis ◽  
Point Count ◽  
Habitat Analysis ◽  
Significant Difference ◽  
Point Count Method ◽  
Order Passeriformes

Abstract The Rufous treepie (Dendrocitta vagabunda) belongs to family corvidae, order Passeriformes which includes about 100 species. The current study was conducted to gather information about the Population distribution and habitat analysis of D. vagabunda at District Abbottabad, Pakistan. The data were collected on monthly basis both morning and evening times (2018-2019). “The ‘’Point count Method” was used for population estimation and ‘’Quadrates Method” for habitat analysis of study area. The result shows an average month-wise population density of D. vagabunda was maximum at Jhangra 0.14±0.039/ha, whereas minimum at Havelian 0.11±0.022/ha. There was no significant difference (p>0.05) among monthly population densities of D. vagabunda, however, a significant difference (p<0.05) was found between morning and evening times population of the specie. The present study revealed that importance value index (IVI) of plants species at Sherwan, Bakot, Havelian, Langra and Jhangra were 59.6±12.6, 50.1±6.9, 53.4±6.3, 66.8±10 and 60.1±7.7. Likewise, the frequency of shrubs at Sherwan, Bakot, Havelian, Langra and Jhangra were 33.3±4.2, 45±9.4, 46.7±8.2, 55.6±22.2 and 37.5±8.5. Similarly, the frequency of herbs at Sherwan, Bakot, Havelian, Langra and Jhangra were 40.4±6.0, 37.5±5.6, 53.3±7.4, 48.5±5.2 and 46.9±7.4 respectively. Our results show the study area as suitable habitat for D. vagabunda.

scholarly journals How Timber Harvest Affects the Structure and Diversity of a Montane Forest in Southern Mexico

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 895
Author(s):  
Nayely Martínez-Meléndez ◽  
Neptalí Ramírez-Marcial ◽  
Pablo Martínez-Zurimendi ◽  
Manuel J. Cach-Pérez ◽  
José G. García-Franco
Keyword(s):  
Species Richness ◽  
Dominant Species ◽  
Basal Area ◽  
Timber Harvest ◽  
Montane Forest ◽  
Control Treatment ◽  
Importance Value Index ◽  
Importance Value ◽  
Southern Mexico ◽  
Timber Extraction

Timber extraction directly affects forest structure by opening the canopy, reducing the density and volume of dominant species, and transforming the composition, diversity, and functioning of the forest. We analyze the richness, diversity, and basal area of tree species in a pine–oak montane forest under two stages of the Silvicultural Development Method (thinning and liberation cut treatments) in comparison with remnants of forest considered to be control treatment in the Ocotones forest. Timber extraction began 14 years previously but its effect on the tree structure has not been studied to date in this area. We quantified and measured all the trees with a diameter at breast height >5 cm in 12 0.1 ha circular plots in each treatment. Diversity (Hill numbers) and the importance value index were calculated in each treatment. Observed species richness did not differ between treatments; Pinus oocarpa Schiede ex Schltdl. and Quercus sapotifolia Liebm. were the dominant species regardless of treatment. The principal differences in density and basal area among the treatments were found between the small oaks and small pines. In general, tree density recovered in managed areas because of newly recruited pines and re-sprouting oaks. Although no significant reduction in species richness was detected between treatments, species composition and vegetation structure were modified by the extraction of pine timber and the permanence of many large oaks. Silvicultural treatments appear to create conditions favorable to the maintenance of species richness. The silvicultural interventions in the site meet the objectives of timber production, regeneration, and biodiversity conservation; however, the question of how long the forest can maintain its species diversity and structure after timber extraction remains to be addressed.

scholarly journals Floristic composition, diversity and structure of Khaya senegalensis stands in Benue Department, Cameroon

2021 ◽  
Vol 8 (1) ◽  
pp. 60-68
Author(s):  
Awé Djongmo Victor ◽  
Noiha Noumi Valery Valery ◽  
Madou Chantal Chantal ◽  
Zapfack Louis
Keyword(s):  
Species Richness ◽  
Diversity Index ◽  
Basal Area ◽  
Shannon Index ◽  
Simpson Index ◽  
Importance Value Index ◽  
Importance Value ◽  
Acacia Senegal ◽  
Significant Difference ◽  
Khaya Senegalensis

The present work has been done to provide basic data for a better conservation and valorization ofKhaya senegalensis stands in Sudano-Sahelian zone of Cameroon. A 100 m x 50 m transectmethod was undertaken to measure floristic diversity through the use of species richness,Shannon index, Pielou equitability, Simpson index, importance value index and importance valuefamily. The vegetation structure is determined by density, basal area and biovolume. Theinventory included trees with a dbh ?10 cm on an area of 1 ha per plot. A total of 6743individuals distributed in 24 families, 33 genera and 54 species were inventoried in all Khayasenegalensis stands studied. Statistical analysis showed significant differences, Shannon index,Simpson index, Pielou equitability, density, basal area, biovolume, species richness, heights class,diameters class, circumferences class but does not certify a significant difference of importancevalue index among in the villages. The undergrowth of Khaya senegalensis stands is more diverseat Bamé with a Shannon diversity index (ISH=5.87 ± 0.12 bit). The greatest of Pielou equitabilityis observed at Bamé (EQ=0.80 ± 0.01). The largest of Simpson index is recorded at Bamé(D=0.098 ± 0.001). Khaya senegalensis Stands are denser at Bamé (194 ± 3.12 individuals/ha).The basal area and biovolume of Khaya senegalensis stands are very high at Bamé (BA=25.87 ±0.06 m2/ha and Biovolume =15.32 ± 0.012 m3/ha). The species importance value is maximal in allthe studied villages (SIV=300 ± 71.45). The importance value index of species revealed a cleardominance in the undergrowth of Khaya senegalensis stands are Combretum adenogonium;Acacia senegal; Terminalia laxiflora; Guiera senegalensis; Acacia nilotica; Entada Africana.The vertical structure has three aspects, like the L (Dbh), asymmetric (height) and dissymmetrical(circumference) structures attesting to a strong regeneration of the understory ligneous woods ofKhaya senegalensis stands studied.

scholarly journals Grazing Effects on Species Composition in Rangelands of Upper Mustang, Nepal

Our Nature ◽  
1970 ◽  
Vol 3 (1) ◽  
pp. 69-76
Author(s):  
A. Pokharel
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Clear Understanding ◽  
Wet Season ◽  
Importance Value Index ◽  
Importance Value ◽  
Significant Difference ◽  
Unidentified Species ◽  
Palatable Species ◽  
Experimental Plots

Conservation and management of rangelands require clear understanding of species composition. The objective of this paper is to show the differences in species composition, abundance, mean cover and height between the grazed and ungrazed plots in a specific pasture of Lo Manthang VDC in Upper Mustang. Two seasons' data were collected during July (wet season) and November (dry season) 2005. Species richness, Importance Value Index (IVI), cover and height of the species compared between grazed and ungrazed plots. Twenty species (17 belonging to 14 families: high-7, medium- 2, low – 6 and non palatable – 2 and 3 unidentified species) were recorded in the experimental plots. Species richness didn’t show any significant difference in between the ungrazed and grazed plots in both the seasons. On the basis of IVI value, Kobresia spp. a highly palatable species is dominant in the ungrazed plots in both the seasons. A significant difference (Chi2, p < 0.05, d.f. = 7) in cover during July indicates that the pasture has some impact of grazing.Key words: Conservation, Grazed and ungrazed plots, Management, Rangeland, Species compositiondoi:10.3126/on.v3i1.337Our Nature (2005) 3: 69-76

scholarly journals Factors Influencing Liana Species Richness and Structure following Anthropogenic Disturbance in a Tropical Forest, Ghana

ISRN Forestry ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Patrick Addo-Fordjour ◽  
Philip El Duah ◽  
David Kafui Kudjo Agbesi
Keyword(s):  
Species Richness ◽  
Forest Structure ◽  
Forest Type ◽  
Basal Area ◽  
Forest Tree ◽  
Stepwise Multiple Regression ◽  
Importance Value Index ◽  
Importance Value ◽  
Soil Variables ◽  
Species Richness And Abundance

The study was conducted to determine the factors that influenced liana species richness and structure in forests of different disturbance intensities (high, moderate, and low disturbance forests) in the Southern Scarp Forest Reserve, Ghana. Within each forest, lianas (dbh  cm) were enumerated in six  m2 plots located along transects. Soil physicochemical properties and forest structure were determined within the plots. Liana species richness and abundance were significantly lower in the high disturbance forest () whereas basal area was significantly higher in the low disturbance forest (). Tree abundance and dbh significantly predicted liana species richness and structure in the study (). On the basis of the importance value index, three main liana communities, each corresponding with a forest type, were identified. Stepwise multiple regression analysis revealed that exchangeable magnesium and calcium, and total exchangeable bases were the main soil variables that affected liana species richness. Liana structure was influenced by the above-mentioned soil variables as well as exchangeable potassium and sodium, and pH. The present study has demonstrated that changes in liana species richness and structure following human disturbance may be due to variations in soil properties and forest structure.

scholarly journals Strukturdan Asosiasi Komunitas Tumbuhan Bawahdi Resort Cikaniki, Taman Nasional Gunung Halimun Salak

2017 ◽  
Vol 8 (2) ◽  
Author(s):  
Rizmoon Nurul Zulkarnaen
Keyword(s):  
Diversity Index ◽  
Ground Cover ◽  
Water Source ◽  
Sampling Location ◽  
Abiotic Factor ◽  
Importance Value Index ◽  
Importance Value ◽  
Chi Square ◽  
Dominant Type ◽  
Chi Square Analysis

A study on structure and association of ground cover plants commnunity was conducted in Cikiniki Resort, Gunung Halimun Salak National Park, West Java. The aimed of this study was to determine the structure and degree of association of ground cover plant that dominates with others ground cover plants. Plot observation using purposive sampling method. The sampling location was divided into two observation sites near the water source and away from the water source. We developed 20 plots with measure on 2 x 2 m2. The data obtained are frequency, density, dominance, Importance Value Index (INP), Distribution Index and Diversity Index Type. The relationship between abiotic factor and vegetation association was analyzed using Chi-Square analysis. The results showed that the dominant type was Schismatoglottis calyptrata (Roxb.) Zoll. & Moritzi (INP: 41.67%), Homalomena cordata Schott (INP: 16.87%), Cyrtandra populifolia Miq. (INP: 12.27%), Psychotria viridiflora Reinw. Ex Blume (INP: 11.79%) and Amischotolype mollissima (Blume) Hassk. (INP: 10,77%). Based on the calculation of chi-square (X2) associations S.calyptrata with other dominant species have low values of 0.26 (H. cordata), 0.25 (C. populifolia), 0.275 (P. viridiflora) and has no association with A. mollissima.

Determination of importance value indices of some plant species using closest individual sampling techniques

2020 ◽  
Vol 34 (1) ◽  
pp. 79-85
Author(s):  
F.O. Ezulike ◽  
C.G. Ukpaka ◽  
B.C. Chinyere
Keyword(s):  
Plant Species ◽  
Crop Production ◽  
Economic Plant ◽  
Importance Value Index ◽  
Importance Value ◽  
Chi Square ◽  
Level Of Significance ◽  
Chi Square Analysis ◽  
The University

This study was conducted to determine the Important Value Indices (IVI) of some plants in the University farm. Eighty plant stands belonging to three families (Musaceae, Caricaceae and Arecaceae) were identified. Their frequency and coverage percentage were measured within the sampling plot. Data obtained were subjected to Chi-square analysis to test for significance at 5% level of significance. The results indicated that the mean richness of Caricaceae, Arecaceae and Musaceae species in the study area were 3, 2 and 6, respectively. The highest (p<0.05) Floral Value Index of 90.52 was recorded in plantain group while the least value (22.40) was recoreded in coconut. The relative density ranged from 7.5 to 45 for the genus Cocos l. and Musa l. The highest Relative Frequency (46.03 %) was recorded for Musa l. and the least in Cocos l respectively. The Important Value Indices ranged between 20 and 152 which indicated that Igbariam had a very rich Agricultural soil for Economic plant development particularly for the families of Musaceae. The Musaceae showed the maximum IVI, hence the most important family among the studied plant species in the Agricultural farm plot. Thus, it is concluded that Musaceae, particularly plantain, should be given special consideration in prioritizing species for crop production in the study area. Keywords: importance value index, family importance value, plant, species, Musaceae

scholarly journals Assessment of tree diversity in distinctive deciduous forests of Suruli falls, Southern Western Ghats

2018 ◽  
Vol 10 (4) ◽  
pp. 1085-1093
Author(s):  
J Naveenkumar ◽  
Somaiah Sundarapandian
Keyword(s):  
Species Richness ◽  
Western Ghats ◽  
Deciduous Forest ◽  
Basal Area ◽  
Deciduous Forests ◽  
Stem Density ◽  
Diameter Class ◽  
Importance Value Index ◽  
Importance Value ◽  
Southern Western Ghats

A quantitative inventory was conducted in two distinctive tropical deciduous forests at Suruli falls forest of southern Western Ghats.  Two one-hectare plots were established and all trees >10cm DBH measured. Species richness, density, family importance value (FIV) and importance value index (IVI) were calculated and the results varied among the two sites. A total of 777 stems and 52 species were documented in both the sites and moist deciduous forest (MDF) had maximum number species richness and density than dry deciduous forest (DDF). The basal area was higher in MDF (502 stems/ha and 16.52 m2/ha) than in DDF (275 stems/ha and 7.23 m2/ha). However, Shannon and evenness indices showed a negative trend (DDF- 2.62, 0.41 and MDF- 2.37, 0.27). Diameter class-wise distribution of trees showed reverse ‘J shaped’ curve in both the forest types. Pterocarpus marsupium was the mono-dominant species holding one-third of the IVI (113), 27% of the stem density and 30% of the total basal area. DDF site is suspected to recurrence of annual fire. Anogeissus latifolia and Strychnos potatorum were the fire-tolerant species only found in lower diameter class. The maximum species shared contiguous distribution in the deciduous forests. The observed variations in the tree community between the two deciduous forest sites are possibly due to variations in altitude, rainfall, temperature, past disturbance, fire and edaphic characteristics.

scholarly journals Assessing the sustainability of traditional agroforestry practices: a case of Mamar agroforestry in Kupang-Indonesia

2021 ◽  
pp. 438-457
Author(s):  
Alfred Umbu Kuala Ngaji ◽  
Muhammad Baiquni ◽  
Hatma Suryatmojo ◽  
Eko Haryono
Keyword(s):  
Ecosystem Services ◽  
Diversity Index ◽  
Importance Value Index ◽  
Importance Value ◽  
The People ◽  
Change Of Perspective ◽  
Traditional Agroforestry ◽  
Cultural Functions ◽  
Important Value Index ◽  
West Timor

A traditional agroforestry of West Timor, namely Mamar, produces important ecosystem services to the people of this arid region, however, its management tends to change, thereby disrupting its sustainability. This study aims to assess the sustainability of Mamar agroforestry by analyzing the livelihood assests of the community, the biophysical land performance of the soil, and the value of ecosystem services. Furthermore, data, on perception and livelihood assets; the level of soil damage, the importance value index, and diversity index, the value of ecosystem services based on the opinion of experts and community leaders, as well as change in land use were collected in five villages in Kupang district using surveys with a qualitative and quantitative approach. The results showed a change of perspective in Mamar's management; the decrease in the important value index of cultural crops, the diversity index is classified as declining, there is soil damage in several parameters, and the value of ecosystem services does not focus on cultural services. Considering this result, there is a socio-ecological trade-off that reduces support for the sustainability of  Mamar as traditional agroforestry that emphasizes socio-cultural functions.

scholarly journals Seasonal variation in Importance Value Index (IVI), Diversity Indices and Biomass of aquatic macrophytes at Biratnagar and adjoining areas, eastern Nepal

2013 ◽  
Vol 1 ◽  
pp. 1-7 ◽  
Author(s):  
Bhabindra Niroula ◽  
KLB Singh
Keyword(s):  
Species Richness ◽  
Seasonal Variation ◽  
Primary Productivity ◽  
Aquatic Macrophytes ◽  
Diversity Indices ◽  
Importance Value Index ◽  
Importance Value ◽  
Low Diversity ◽  
Freshwater Bodies ◽  
High Species Richness

Aquatic macrophytes of three freshwater bodies of Biratnagar and adjoining areas in eastern Nepal namely, Betana-a natural oxbow pond, Bhattapokhari-an aged derelict depression, and Singhia river were analysed for their importance value index (IVI), diversity indices and biomass seasonally from January 2008 to December 2009. Singhia river had high species richness-d (2.08-3.84) and Shannon Wienner index-H' (2.16-2.68). Betana pond and Bhattapokhari had low diversity indices; however, nutrient rich Bhattapokhari had highest primary productivity (2675.5 g/m2/yr) in comparison to Betana pond (303.7 g/m2/yr) and Singhia river (479.09 g/m2/yr). Seasonally vittates dominated Betana pond had IVI range between 6.3 and 258.8 and biomass range between 168.1±7.3 and 265.8±38.7 g/m2); pleustophytes dominated Bhattapokhari had IVI range between 41.6 and 192.8 and biomass range between 925.5±353.2 and 2020.02±213.1 g/m2), and hyperhydate dominated Singhia river had IVI ranged between 2.5 and 160.9 and biomass ranged between 120.7±55.8 and 283.5±28.3 g/m2.DOI: http://dx.doi.org/10.3126/njbs.v1i0.7462 Nepalese Journal of Biosciences 1: 1-7 (2011)

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