scholarly journals Nesting trees of the Red Giant Gliding Squirrel Petaurista petaurista (Mammalia: Rodentia: Sciuridae) in a tropical forest of Namdapha National Park, India

2019 ◽  
Vol 11 (6) ◽  
pp. 13720-13726 ◽  
Author(s):  
Murali Chatakonda Krishna ◽  
Awadhesh Kumar ◽  
Om Prakash Tripathi
Keyword(s):  
Tropical Forest ◽  
Tree Species ◽  
National Park ◽  
Tree Height ◽  
Time Period ◽  
Denning Ecology ◽  
Recorded Data ◽  
Namdapha National Park ◽  
Red Giant ◽  
Nesting Habits

The present study investigated the nesting habits of the Red Giant Gliding Squirrel in the tropical forest of Namdapha National Park, India within the time period of 2012–2013.  Gliding squirrel nest trees were located by searching for them with using spotlighting during evenings and early mornings.  For each den site we recorded data on nesting tree species, total height of tree, height of the nest on tree, tree diameter at breast height (DBH), and canopy connectivity of the nesting tree.  We observed P. petaurista using cavity nests (n=27) in eight tree species.  The majority of nest trees observed were in Altingia excelsa (40.7%) and Terminalia myriocarpa (22.2%).  Trees with less canopy connectivity were preferred for nesting where 59.3% of nest trees had <25% canopy connectivity.  Petaurista petaurista nested in trees with an average of 31.1±0.86m (Mean ± SE) height and the nests were located at a mean height of 17.8±0.89m (SE) (min & max: 9.3m & 35.2m).  Mean DBH of nesting trees was 70.6±0.98cm (SE) (min & max: 38.2cm & 168.8cm).  This data helps in filling the gaps on the denning ecology of the species and may be useful for the management and conservation purpose of forest trees. 

scholarly journals ASOSIASI POHON DENGAN EPIFIT Hoya spp. DI TAMAN NASIONAL BUKIT DUABELAS Tree Association with Epiphytes Hoya spp. in Bukit Duabelas National Park

2018 ◽  
Vol 8 (3) ◽  
pp. 191-196
Author(s):  
Inggar Damayanti ◽  
Iskandar Z. Siregar ◽  
Sri Rahayu
Keyword(s):  
Tree Species ◽  
National Park ◽  
Word Association ◽  
Variable Temperature ◽  
Ornamental Plants ◽  
Tree Height ◽  
Tropical Rainforests ◽  
Crown Cover ◽  
Degree Of Association ◽  
Habitat Variables

In the tropical rainforests of Jambi, Sumatera, a particular group of epiphytes, species in the genus Hoya, have significant potential to be developed as commercially valuable ornamental plants, because of the uniqueness and beauty of their flowers. Hoya spp. are epiphytic vines whose survival depends largely on the presence of carrier trees, i.e. phorophyte trees. The study reported here was conducted to identify the level of epiphytic association between phorophyte trees and identified Hoya species. The study found four Hoya species, namely: Hoya rintzii, Hoya revoluta, Hoya coronaria, and Hoya cf. caudata. The four species of Hoya were found growing on eleven different species of phorophyte trees. Based on the results of t-contingency tables it was found that there is no association between particular Hoya species and the particular phorophyte tree species. This conclusion was supported by the calculation of Jaccard association indices demonstrating that the association between Hoya spp. and phorophyte tree species is relatively weak. Crown cover and the diameter of the tree are two habitat variables that affect the presence of Hoya revoluta at the sites. The presence of Hoya caudata was influenced by the variable temperature, while the presence of Hoya coronaria was associated with humidity, but the degree of association was relatively weak. The most significant variables affecting the presence of Hoya rintzii were tree height and elevation.Key word: association, ephyphites, Hoya spp, phorophyte.

scholarly journals Assessment of Vegetation Structure of the African Buffalo (Syncerus caffer) Habitat in Kainji Lake National Park, Nigeria

2021 ◽  
Vol 25 (8) ◽  
pp. 1401-1408
Author(s):  
I.M. Goni ◽  
E.A. Agbelusi ◽  
B.G. Ogunjemite ◽  
O.K. Azeez ◽  
A.A. Ogunjinmi ◽  
...  
Keyword(s):  
Plant Species ◽  
Relative Abundance ◽  
Tree Species ◽  
Vegetation Structure ◽  
National Park ◽  
Tree Height ◽  
Mean Value ◽  
African Buffalo ◽  
Syncerus Caffer ◽  
Kainji Lake

The study assessed the relative abundance and vegetation structure of African buffalo (Syncerus caffer) including plant parameters: frequency, diameter at breast height (dbh), tree height, diversity, evenness, richness, Margalef, dominance in Kainji Lake National Park. Point – Centered Quarter method was used for woody species enumeration. A total of twenty-eight (28) randomly sampled plots of 150m by 100m given 112 points per plot were established in the study area. The abundance and distribution, tree frequencies, heights, dbh and plant biodiversity indices were calculated using the Paleontological Statistics Software (PAST) for scientific data analysis. The results revealed that relative abundance of African buffalo in both morning and evening of dry and wet seasons in various habitats of the Park were 13.33 ± 4.41 and 11.33 ± 4.40 respectively. The study showed the highest mean value of 21.75 ± 6.94 representing 87 individuals in dry season compared to wet season with mean value of 15.25 ± 5.11 representing 61 individuals. A total of 91 woody plant species and 29 tree families were recorded in African buffalo habitats representing 80, 77, 68 and 59 tree species respectively. The highest average girth size of tree species was class between >10cm -50cm with 59.14 ± 4.06 and the highest mean tree height was height class of >3 - 10m with 91.43 ± 5.44. There were significant differences at (p<0.05) between the values of dbh, tree height, diversity, richness and evenness of plant species recorded in different habitats studied in the Park.

Studi Karakteristik Sarang Orangutan (Pongo pygmaeus morio) di Resort Sangatta dan Resort Sangkima Taman Nasional Kutai

SCISCITATIO ◽  
2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Marcelina Tikurara Londong Allo ◽  
Kisworo ◽  
Suhendra
Keyword(s):  
Tree Species ◽  
National Park ◽  
Tree Height ◽  
Pongo Pygmaeus ◽  
Average Height ◽  
Tree Diameter ◽  
Transect Line ◽  
Nest Height ◽  
Nest Type

Orangutan (Pongo pygmaeus morio) merupakan satwa langka yang harus dikonservasi melalui pelestarian Taman Nasional Kutai (TNK). Studi karakteristik sarang orangutan merupakan bagian dari upaya pelestarian. Metode yang digunakan dalam penelitian ini adalah menggunakan jalur transek dengan menghitung sarang orangutan serta mencatat karakteristik sarang orangutan yang meliputi kelas sarang, posisi sarang, tinggi sarang, tinggi pohon, diameter pohon dan jenis pohon sarang. Pada lokasi penelitian ditemukan sebanyak 173 sarang orangutan yang terdiri dari 84 sarang di resort Sangatta dan 89 sarang di resort Sangkima. Jenis sarang didominasi oleh kelas sarang C dan D dengan posisi sarang sebagian besar terdapat pada ujung dahan (UD) di resort Sangatta, posisi sarang terbanyak ada pada ujung dahan (UD) dan pucuk pohon (PP) di resort Sangkima. Rata-rata tinggi sarang orangutan adalah 12,2 - 40,2 m, diameter pohon 17,4 - 110 cm, dan tinggi pohon 12,2 - 40,2 m di resort Sangatta. Pada resort Sangkima rata-rata tinggi sarang orangutan adalah 10,2 - 24,2 m dengan diameter pohon 20 - 109,4 cm dan rata-rata tinggi pohon 14-28,6 m. Karakteristik sarang orangutan menjadi indikator kondisi habitat orangutan yang ada di TNK. Orangutan (Pongo pygmaeus morio) is a rare animal that must be conserved through the preservation of the Kutai National Park (KNP). Study of orangutan nest characteristics is part of conservation efforts. The method used in this study is to use a transect line by counting orangutan nests and noting orangutan nest characteristics which include nest class, nest position, nest height, tree height, tree diameter and nest tree species. At the study site, 173 orangutan nests were found, consisting of 84 nests at Sangatta resort and 89 nests at Sangkima resort. The nest type is dominated by the nest classes C and D with the nest position mostly found at the tip of the branch (UD) at Sangatta resort, the position of most nests is at the tip of the branch (UD) and tree tops (PP) at the Sangkima resort. The average height of orangutan nests is 12.2 - 40.2 m, tree diameter 17.4 - 110 cm, and tree height 12.2 - 40.2 m at Sangatta resort. At Sangkima resort, the average height of orangutan nests is 10.2 - 24.2 m with a tree diameter of 20 - 109.4 cm and an average tree height of 14-28.6 m. The characteristics of orangutan nests are an indicator of the condition of orangutan habitat in KNP.

Leaf litter decomposition of dominant tree species of Namdapha National Park, Arunachal Pradesh, northeast India

2008 ◽  
Vol 13 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Atiqur Rahman Barbhuiya ◽  
Ayyanadar Arunachalam ◽  
Prabhat Chandra Nath ◽  
Mohammed Latif Khan ◽  
Kusum Arunachalam
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Tree Species ◽  
National Park ◽  
Northeast India ◽  
Leaf Litter Decomposition ◽  
Arunachal Pradesh ◽  
Namdapha National Park

scholarly journals The association among dominant tree species in mount Halimun Salak National Park

2021 ◽  
Vol 743 (1) ◽  
pp. 012014
Author(s):  
Denny ◽  
T Setyawati ◽  
T Kalima ◽  
M Wardani ◽  
Zuraida ◽  
...  
Keyword(s):  
Tree Species ◽  
National Park

scholarly journals Evaluation of P-Band SAR Tomography for Mapping Tropical Forest Vertical Backscatter and Tree Height

2021 ◽  
Vol 13 (8) ◽  
pp. 1485
Author(s):  
Naveen Ramachandran ◽  
Sassan Saatchi ◽  
Stefano Tebaldini ◽  
Mauro Mariotti d’Alessandro ◽  
Onkar Dikshit
Keyword(s):  
Tropical Forest ◽  
Vertical Profile ◽  
Mean Squared Error ◽  
Low Frequency ◽  
Tree Height ◽  
Canopy Layer ◽  
Local Maxima ◽  
Slope Correction ◽  
Compensation Approach ◽  
The Impact

Low-frequency tomographic synthetic aperture radar (TomoSAR) techniques provide an opportunity for quantifying the dynamics of dense tropical forest vertical structures. Here, we compare the performance of different TomoSAR processing, Back-projection (BP), Capon beamforming (CB), and MUltiple SIgnal Classification (MUSIC), and compensation techniques for estimating forest height (FH) and forest vertical profile from the backscattered echoes. The study also examines how polarimetric measurements in linear, compact, hybrid, and dual circular modes influence parameter estimation. The tomographic analysis was carried out using P-band data acquired over the Paracou study site in French Guiana, and the quantitative evaluation was performed using LiDAR-based canopy height measurements taken during the 2009 TropiSAR campaign. Our results show that the relative root mean squared error (RMSE) of height was less than 10%, with negligible systematic errors across the range, with Capon and MUSIC performing better for height estimates. Radiometric compensation, such as slope correction, does not improve tree height estimation. Further, we compare and analyze the impact of the compensation approach on forest vertical profiles and tomographic metrics and the integrated backscattered power. It is observed that radiometric compensation increases the backscatter values of the vertical profile with a slight shift in local maxima of the canopy layer for both the Capon and the MUSIC estimators. Our results suggest that applying the proper processing and compensation techniques on P-band TomoSAR observations from space will allow the monitoring of forest vertical structure and biomass dynamics.

A case of gender equality: absence of sex-related costs in a dioecious tropical forest tree species

Plant Ecology ◽  
2021 ◽  
Author(s):  
Valéria Forni Martins ◽  
Rafaela Letícia Brito Bispo ◽  
Priscilla de Paula Loiola
Keyword(s):  
Tropical Forest ◽  
Gender Equality ◽  
Tree Species ◽  
Forest Tree ◽  
Forest Tree Species
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