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 Assessment of non timber forest products in Baghmara Buffer Zone Community Forest, Chitwan, Nepal

2018 ◽  
Vol 30 ◽  
pp. 209-220
Author(s):  
Udisha Danekhu ◽  
Rajeswar Shrestha ◽  
Sanu Raja Maharjan
Keyword(s):  
Ecological Status ◽  
Forest Products ◽  
Buffer Zone ◽  
Preference Ranking ◽  
Asparagus Racemosus ◽  
Community Forest ◽  
Importance Value Index ◽  
Importance Value ◽  
Significant Difference ◽  
Non Timber Forest Products

Non-Timber Forest Products (NTFPs) are the forest products except timber used for various purposes from which economic status of the country can be increased through green growth based economy. The study was conducted in Baghmara Buffer Zone Community Forest for the inventory, to document various uses and find out the preferred NTFPs potential for economic development of Community Forest User Groups. Stratified random sampling was applied in which 50 quadrats of size 25m×20m for trees, 100 subplots of 10m×10m for shrubs and 200 small subplots of 1m×1msize for herbs and climbers were taken. Parameters like density, frequency, abundance, importance value index, diversity index, evenness index and dominance index were calculated to find out the ecological status of NTFPs. Questionnaire survey of 100 households was done for studying different uses and interview with 10 key informants were carried out to identify 10 most preferred NTFPs. Altogether, 109 NTFPs were enumerated. Trewia nudiflora, Clerodendrum viscosum, Imperatacylindrica and Mikania micrantha were dominant tree, shrub, and herb and climber species accordingto Importance value Index (IVI). There is significant difference in density of trees, shrubs, herbs and climbers between different sample quadrats i.e. p value < 0.05. NTFPs found were used for medicine, fodder, food, veterinary, dying, handicrafts, crop management, ornamental, insecticides, construction, beverage, piscicidal, religious and miscellaneous purposes. Calamus tenuis, Curcumalonga, Piper longum, Phyllanthus emblica, Asparagus racemosus, Terminalia bellirica, Terminaliachebula, Bauhinia variegata, Tinospora sinensis and Dryopteris cochleata were ten most preferred Non Timber Forest Products from matrix preference ranking.

scholarly journals WEED PHYTOSOCIOLOGY AND DISTRIBUTION IN VINEYARDS IN THE SÃO FRANCISCO RIVER VALLEY

2021 ◽  
Vol 34 (1) ◽  
pp. 132-143
Author(s):  
BRUNO FRANÇA DA TRINDADE LESSA ◽  
MATHEUS ALVES DA PAZ ◽  
ARIEL MARQUES REGES ◽  
IGOR SOUZA DE OLIVEIRA ◽  
MIRELLA RODRIGUES ANTUNES
Keyword(s):  
Population Distribution ◽  
Production Systems ◽  
Plant Protection ◽  
Control Strategies ◽  
River Valley ◽  
Importance Value Index ◽  
Importance Value ◽  
Important Species ◽  
Sao Francisco River ◽  
São Francisco River

ABSTRACT Information on the different species that compose a weed community is essential for plant protection managements in production systems, which should include not only flora identification and diversity assessments, but morphological and ecophysiological aspects that can to show the potential effect of the agrosystem and guide the conduction of weed control strategies. Therefore, the objective of this work was to conduct a floristic and phytosociological surveying to identify the grouping patterns of weed populations in vineyards in the Petrolina-Juazeiro irrigated perimeter, in the Sub-Mid São Francisco River Valley, Brazil. The absolute and relative values of weed frequency, density, abundance, importance value index, population distribution level, and similarity between areas were evaluated in five properties. A high diversity of species of the families Poaceae, Malvaceae, and Asteraceae were found. The most important species found were Commelina benghalensis, Euphorbia hirta, and Cyperus aggregatus. The distribution of populations was mainly in aggregate and highly aggregate forms.

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 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 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 Study Of Plant Regeneration Potential In Tropical Moist Deciduous Forest In Northern India

2013 ◽  
Vol 2 (1) ◽  
pp. 153-163 ◽  
Author(s):  
Ashish K Mishra ◽  
Omesh Bajpai ◽  
Nayan Sahu ◽  
Anoop Kumar ◽  
Soumit K Behera ◽  
...  
Keyword(s):  
Plant Species ◽  
Tree Species ◽  
Population Distribution ◽  
Deciduous Forest ◽  
Importance Value Index ◽  
Importance Value ◽  
Regeneration Potential ◽  
Northern India ◽  
Regeneration Status ◽  
Tree Sapling

Regeneration patterns of species population can address climate change by adaptive evolution or by migrating association to survive in their favorable climate and finally decided to particular forest future. In this paper we examined the status of regeneration potential of tree species in tropical moist deciduous forest at Katerniaghat Wildlife Sanctuary, Northern India. To investigate tree, sapling and seedling population distribution, we examine regeneration status in 145 random plots in study area. Total 74 plant species of 60 genera belonging to 32 families out of which 71 species of trees, 56 of seedlings and 60 of saplings were found in the forest. On the basis of importance value index Mallotus philippensis, Tectona grandis, Shorea robusta, Syzygium cumini and Bombax ceiba have been found as dominant species in the study area. As far as the regeneration status is concerned, the maximum tree species (64%) have been found in good regeneration category. Significant variations in species richness and population density, between three life form (i. e. tree, sapling and seedling) have been found. In which only three new tree species Prosopis juliflora, Psidium guajava and Morus alba were added in sapling and seedling stage. It is major ecological concern that about 19 % economically important plant species like Madhuca longifolia, Terminalia elliptica, Buchanania cochinchinensis, some Ficus species etc. have been found in poor regeneration phage, whereas about 7% species found in no regeneration categories. International Journal of Environment, Volume-2, Issue-1, Sep-Nov 2013, Pages 153-163 DOI: http://dx.doi.org/10.3126/ije.v2i1.9218

scholarly journals Comparison of point and roadside transect methods to evaluate the abundance and richness of diurnal raptors in the arid region of Rajasthan

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0259805
Author(s):  
Govind Tiwari ◽  
Puneet Pandey ◽  
Rahul Kaul ◽  
Hang Lee ◽  
Randeep Singh
Keyword(s):  
Species Richness ◽  
Average Length ◽  
Survey Methods ◽  
Survey Method ◽  
Point Count ◽  
Point Counts ◽  
Significant Difference ◽  
Unidentified Species ◽  
Species Richness And Abundance ◽  
Point Count Method

Diurnal raptors show a wider distribution compared to other groups of birds including passerines, woodpeckers, and seriemas, but occur at lower-than-expected densities. Estimating the precise abundance is essential to achieve conservation goals but the methods used to estimate the populations of birds need to be appropriate to arrive at meaningful conclusions. We compared the two survey methods: roadside point count and strip transects, for estimating species richness and abundance of raptors in the arid landscape of Rajasthan. Roadside point counts and roadside strip transects were done on 50 transects between December 2019- February 2020 (with an average length of 20 km and a total distance of 3000 km) to assess the species richness and abundance of raptors. A total of 2954 observations of raptors belonging to 35 species were recorded using both methods. Mann Whitney U test result showed no significant difference in species richness and abundance estimates between both methods (p = 0.206). The point count method yielded a higher relative abundance of 2.79 individuals [10 km2]-1h-1 than the 1.90 individuals [10 km2]-1h-1 obtained during the strip transect. Also, the number of unidentified species were less for point counts. Extrapolation values indicated that both the methods do not differ much for the detection of unsampled species. The choice of survey method depends on the objectives of the study, but our results favor the use of point counts rather than strip transects to survey raptors in open habitats. The information generated from this study is expected to provide the most efficient method to study the abundance and distribution of raptors in similar landscapes.

scholarly journals Community Structure of Seagrass Field in Litoral Zone of Leweung Sancang Garut Nature Reserve

2021 ◽  
Vol 21 (2) ◽  
pp. 526
Author(s):  
Dimas Zulfadillah ◽  
Diana Hernawati ◽  
Diki Muhamad Chaidir
Keyword(s):  
Nature Reserve ◽  
Coastal Ecosystems ◽  
Conservation Strategies ◽  
Observation Data ◽  
Importance Value Index ◽  
Importance Value ◽  
Seagrass Meadows ◽  
Seagrass Community ◽  
Chemical Indicators ◽  
Significant Difference

Seagrass meadows or seagrass beds are one of the important components in coastal ecosystems. Seagrasses provide ecosystem services for various biota that live in it as well as components of the surrounding coastal ecosystems. The Sancang Nature Reserve is one of the coastal areas that has seagrass communities, and seagrass observation data is needed for reference to conservation strategies. This study aims to determine the condition of the cover and the structure of the seagrass community that fills the littoral zone of the Sancang Nature Reserve using the quadratic transect method, which was conducted from March 17 – 21, 2021. The data collected were seagrass species, species frequency, species cover and total cover, and the importance value index of species. Observations were made at 3 stations with an area of 100 m2 each along Ciporeang Beach, at each station 30 square transects with a size of 50 cm were placed, with 1 square transect divided into 25 grids measuring 10 cm. As well as the observation of environmental physical and chemical indicators. The results showed that the seagrass community in the research sites were overgrown by species Cymodocea rotundata and Thalassia hempricii which had a cover condition in the rich category with a percentage of 61.09%. Species densities were 117 i/m and 679 i/m, species closures were 36.95% and 25.63%, and the importance value index of species were 1.49 and 0.54. The difference was significantly influenced by physical indicators such as substrate structure and current velocity, while the chemical indicators at each station did not show a significant difference. Nutrient content data in the substrate at each station is needed to get more detailed conclusions about the factors that affect seagrass cover on the Sancang coast.

Struktur Makroalga Pada Ekosistem Lamun Di Kecamatan Tabukan Selatan, Kabupaten Kepulauan Sangihe, Sulawesi Utara (Structure of Macroalgae in Seagrass Ecosystems at South Tabukan District, Sangihe Islands Regency, North Sulawesi

2019 ◽  
Vol 9 (1) ◽  
pp. 44
Author(s):  
Irawaty Mertosono ◽  
Ratna Siahaan ◽  
Pience Maabuat
Keyword(s):  
Sampling Technique ◽  
Marine Macroalgae ◽  
Line Transect ◽  
Land Conversion ◽  
Importance Value Index ◽  
Importance Value ◽  
North Sulawesi ◽  
Sea Transportation ◽  
Seagrass Ecosystems ◽  
Biodiversity Decline

Struktur Makroalga Pada Ekosistem Lamun Di Kecamatan Tabukan Selatan, Kabupaten Kepulauan Sangihe, Sulawesi Utara(Structure of Macroalgae in Seagrass Ecosystems at South TabukanDistrict, Sangihe Islands Regency, North Sulawesi) Irawaty A. Mertosono1), Ratna Siahaan1*) Pience V. Maabuat1)1)Jurusan Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sam Ratulangi, Manado 95115*Email korespondensi:[email protected] Diterima  15 Februari 2019, diterima untuk dipublikasi 28 Februari  2019 Abstrak Makroalga laut merupakan tumbuhan laut yang tidak memiliki akar, batang, maupun daun sejati. Kegiatan manusia berupa pemanfaatan makroalga, konversi lahan, dan transportasi laut dapat menjadi penyebab penurunan biodiversitas makroalga. Tujuan penelitian ini adalah untuk menganalisis struktur dan distribusi makroalga pada ekosistem lamun di Kecamatan Tabukan Selatan, Kabupaten Kepulauan Sangihe, Sulawesi Utara. Lokasi penelitian di tiga stasiun penelitian yaitu Pantai Karurung - Desa Salurang, Pantai Palareng - Desa Palareng dan Pantai Galoghong – Desa Batuwingkung. Penelitian dilakukan pada November-Desember 2018 dengan pengambilan sampel menggunakan metode garis transek (line transect) dengan teknik pencuplikan kuadrat. Makroalga yang ditemukan sebanyak 36 spesies yang terdiri atas 25 spesies Divisi Chlorophyta, sembilan (9) spesies Divisi Rhodophyta dan dua (2) spesies Divisi Phaeophyta. Makroalga Bornetella nitida memiliki Indeks Nilai Penting 39, 24% mendominasi di lokasi penelitian. Keanekaragaman Shannon-Wiener (H’) spesies makroalga di Stasiun I (H’:3,02) tergolong tinggi sedangkan pada Stasiun II (H’:2,86)  dan Stasiun III (H’:2,63) tergolong sedang. Secara keseluruhan, keanekaragaman spesies makroalga di Kecamatan Tabukan Selatang tergolong tinggi (H’:3,00). Kata kunci:   struktur makroalga, Pantai Karurung, Pantai Palareng, Pantai Galoghong,Tabukan Selatan Abstract Marine macroalgae are marine plant-like organisms that has no true roots, stems, or leaves. The human ativities of macroalgae utilization, land conversion, and sea transportation can cause of macroalgae biodiversity decline. The purpose of this study was to analyze the structure and distribution of macroalgae in seagrass ecosystems at South Tabukan District, Sangihe Islands Regency, North Sulawesi. The research locations were at three research stations, i.e. Karurung Beach - Salurang Village, Palareng Beach - Palareng Village and Galoghong Beach - Batuwingkung Village. The study was conducted in November-December 2018 with line transect method sampling and quadrate sampling technique. Macroalgae were 36 species consists of 25 species of Chlorophyta Division, nine (9) species of Rhodophyta Division and two (2) species of Phaeophyta Division. Macroalga Bornetella nitida had Importance Value Index 39.24% that dominated research locations. The Shannon-Wiener biodiversity Index (H’) of macroalgae species at Station I (H': 3.02) was classified as high while Station II (H': 2.86) and Station III (H ': 2.63) were moderate. Overall, macroalgae species diversity at Tabukan Selatang District was high (H’: 3.00). Keywords: Macroalgae structure, Macroalgae distribution, Karurung Beach, Palareng Beach, Galoghong Beach, South Tabukan

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