scholarly journals A study on the density, population structure and regeneration of Red Sanders Pterocarpus santalinus (Fabales: Fabaceae) in a protected natural habitat - Sri Lankamalleswara Wildlife Sanctuary, Andhra Pradesh, India

2017 ◽  
Vol 9 (9) ◽  
pp. 10669 ◽  
Author(s):  
Chenchu Ankalaiah ◽  
Thondaladinne Mastan ◽  
Mullangi Sridhar Reddy
Keyword(s):  
Population Structure ◽  
Natural Habitat ◽  
Eastern Ghats ◽  
Stem Density ◽  
Mature Trees ◽  
Adult Trees ◽  
Pterocarpus Santalinus ◽  
Ratio Change ◽  
Red Sanders ◽  
Density Population

Pterocarpus santalinus is a highly valued medium-sized leguminous endemic tree with a restricted range in the southern Eastern Ghats deciduous forests.  The enumeration in four 1ha plots has yielded a total of 878 Red Sanders tree individuals (≥30cm girth at breast height - gbh) with a range of 165–246 individuals per ha and 9–51 individuals per 0.01ha.  The size class structure revealed that the majority of individuals occurred in lower gbh classes with 364 individuals (39.5%) in 30–50 cm gbh class and 420 individuals (45.6%) in 51–70 cm gbh class, while in the higher gbh class (71–90 cm gbh) only 129 individuals (14%) and seven individuals in >90cm gbh class were recorded.  Overall the population structure indicated a low ratio change in lower gbh classes suggesting a stable population.  A higher percentage of life stages in recruitment stage like seedlings and saplings than trees was observed and the feature of re-sprouting from roots after fire damage was also recorded.  A bottleneck progress from regenerating trees to adult trees was noticed, may be due to slow growth of the species.  High stem density and presence of individuals in all the regenerating and reproductive classes suggest that Red Sanders is tolerant to mild disturbance.  But the drastic reduction in the density in higher gbh class reflects the concern for recruitment in future as it may affect the seed output due to loss of reproductively fit mature trees.

scholarly journals Non-Inverse J - shaped population distribution: Peculiarity of Red Sanders forests

2018 ◽  
Vol 10 (2) ◽  
pp. 11356
Author(s):  
S. Suresh Ramanan ◽  
T. K. Kunhamu
Keyword(s):  
Population Structure ◽  
Andhra Pradesh ◽  
Population Distribution ◽  
Natural Habitat ◽  
Wildlife Sanctuary ◽  
Pterocarpus Santalinus ◽  
Red Sanders ◽  
Density Population

Response to the published article "A study on the density, population structure and regeneration of Red Sanders (Pterocarpus santalinus) (Fabales: Fabaceae) in a protected natural habitat of Sri Lankamalleswara Wildlife Sanctuary, Andhra Pradesh, India" by Ankalaiah et al. 2017. 

scholarly journals De Novo Transcriptome Assembly and Development of EST-SSR Markers for Pterocarpus Santalinus L. f. (Red sanders) , a Threatened and Endemic Timber Tree of India

2021 ◽  
Author(s):  
Sindhu Agastikumar ◽  
Maheswari Patturaj ◽  
Aghila Samji ◽  
Balasubramanian Aiyer ◽  
Aiswarya Munnusamy ◽  
...  
Keyword(s):  
Ssr Markers ◽  
De Novo ◽  
Transcriptome Assembly ◽  
In Situ Conservation ◽  
Timber Harvest ◽  
Eastern Ghats ◽  
Structure Identification ◽  
Peninsular India ◽  
Pterocarpus Santalinus ◽  
Red Sanders

Abstract The endemic and precious timber Pterocarpus santalinus L. f. (Red sanders) is a drought hardy tree species for conservation in peninsular India due to its high risk of illegal timber harvest. It is only found in Eastern Ghats of India, and has become threatened owing to overexploitation of its valuable timber. The development of genomic resources, particularly simple sequence repeat (SSR) markers, is essential for strict implementation of in situ conservation measures and application of DNA information based red sanders genetic resource management. However, a lack of genomic data and efficient molecular markers limit the study of its spatial and temporal population genetic structure, identification of diversity hotspots and tree improvement. The current study aims at comprehensive molecular characterization of red sanders and the somatic chromosome counts, flow cytometry and EST-SSR analyses. The results revealed that red sanders is diploid with 2n=20 and the 2C genome size was 0.7872 ± 0.0561pg for the first time in this species. A total of 3128 EST-SSRs were detected based on 25,854 de novo assembled unigenes from transcriptome data and primer sets designed for 1953 SSRs. Fifty-nine EST-SSR markers were evaluated for polymorphism in the natural populations of red sanders and 13 were found to be suitable for genetic analysis. Two major transcription factor families bHLH and ERF, responsible for abiotic stress and secondary metabolite synthesis were analysed which would provide the foundation for further research on production of medicinally important biocompounds.

scholarly journals Population structure of Cotylelobium melanoxylon within vegetation community in Bona Lumban Forest, Central Tapanuli, North Sumatra, Indonesia

2019 ◽  
Vol 20 (6) ◽  
Author(s):  
ARIDA SUSILOWATI ◽  
HENTI HENDALASTUTI RACHMAT ◽  
DENI ELFIATI ◽  
CUT RIZLANI KHOLIBRINA ◽  
YOSIE SYADZA KUSUMA ◽  
...  
Keyword(s):  
Population Structure ◽  
Diversity Index ◽  
Natural Habitat ◽  
Line Transect ◽  
Growth Stages ◽  
Mature Trees ◽  
Vegetation Community ◽  
Regeneration Status ◽  
In The Wild ◽  
North Sumatra

Abstract. Susilowati A, Rachmat HH, Elfiati D, Kholibrina CR, Kusuma YS, Siregar H. 2019. Population structure of Cotylelobium melanoxylon within vegetation community in Bona Lumban Forest, Central Tapanuli, North Sumatra, Indonesia. Biodiversitas 20: 1681-1687. In many forests stand, Cotylelobium melanoxylon is hard to find in the wild at present day because its bark has been intensively harvested for traditional alcoholic drink and sold by kilogram in traditional market in North Sumatra and Riau. This activity has put the species into serious threats of their existence in their natural habitat. We conducted study to determine the population structure of the species at seedling to tree stage in Bona Lumban Forest, Central Tapanuli. We used purposive sampling by making line transect at forest area where C. melanoxylon naturally grow. There were four transects with each transect consisted of five plots in which nested plots were established to record data at four growth stages, resulting in 80 plots in total. The result showed that the Important Value Index (IVI) for C. melanoxylon were 66.33, 17.65, 11.82, 12.90; Diversity Index (H) were 2.9, 1.90,2.88, 2.53 and 12.90, Index of evenness (E) were 0.844, 0.534, 0.85, 0.935 and the Index of Richness (R) were 5.71, 7.13, 5.37, 3.67 for the stage tree, pole, sapling, and seedlings, respectively This result demonstrates that C. melanoxylon still grows naturally in Bona Lumban at all stages from tree to seedling. However, there might be a problem in its natural regeneration as there is big difference of its high IVI at tree stage compared to IVI value for its younger stages. The regeneration status of C. melanoxylon was also classified into fair. This might be generated from the condition that the existing mature trees remaining were no longer productive and healthy due to excessive harvesting for its bark.

scholarly journals Phytodiversity and conservation of Nithypooja Kona Sacred Grove of Nallamala Hill Range, Eastern Ghats, Andhra Pradesh

2015 ◽  
Vol 4 (2) ◽  
pp. 271-288
Author(s):  
SKM Basha ◽  
M John Paul ◽  
P Siva Kumar Reddy
Keyword(s):  
Andhra Pradesh ◽  
Raw Materials ◽  
Eastern Ghats ◽  
Sacred Grove ◽  
Sacred Groves ◽  
Gloriosa Superba ◽  
Ecological Functions ◽  
Pterocarpus Santalinus ◽  
Pharmaceutical Industries ◽  
Red Sanders

Sacred groves are climax forests and are the only representatives of natural or near-natural vegetation. These are dedicated to deities or ancestral spirits worshipped by local tribes along with surrounding plants and trees. These are ecosystems by themselves and perform all the ecological functions. Phytodiversity constitute a large segment of the flora which provides raw materials for use by numerous Pharmaceutical industries. The present study will be useful for researchers in the field of Ethan botany, Ethnomedicine, Taxonomy, and Pharmacology for further studies. Nithyapoojakona Sacred grove is one of the important sacred groves in Kadapa district. The present paper deals with the phyto-diversity of the above grove used by local tribes. This paper deals with the 181 species of probable medicinal potential belonging to 138 genera and 71 families. Significant flora are Cycas beddomei, Pterocarpus santalinus, Drosera burmaptonni, Orabanche cernua, Neptunia oleracea, Hugonia mystax, Caralluma adsendens , Gloriosa superba, Limnophila spp, Centella sasiatica etc. Word famous Red sanders population of the study area is being destroyed unethically and it is to be protected. DOI: http://dx.doi.org/10.3126/ije.v4i2.12648 International Journal of Environment Vol.4(2) 2015: 271-288

Occupancy of two forest specialist birds in the Southern Mistbelt Forests of KwaZulu-Natal and Eastern Cape, South Africa

2020 ◽  
pp. 1-16
Author(s):  
S. THOBEKA GUMEDE ◽  
DAVID A. EHLERS SMITH ◽  
YVETTE C. EHLERS SMITH ◽  
SAMUKELISIWE P. NGCOBO ◽  
MBALENHLE T. SOSIBO ◽  
...  
Keyword(s):  
South Africa ◽  
Camera Trap ◽  
Habitat Requirements ◽  
Stem Density ◽  
Grass Cover ◽  
Eastern Cape ◽  
Wet Season ◽  
Mature Trees ◽  
Natural Habitats ◽  
Kwazulu Natal

Summary Establishing the specific habitat requirements of forest specialists in fragmented natural habitats is vital for their conservation. We used camera-trap surveys and microhabitat-scale covariates to assess the habitat requirements, probability of occupancy and detection of two terrestrial forest specialist species, the Orange Ground-thrush Geokichla gurneyi and the Lemon Dove Aplopelia larvata during the breeding and non-breeding seasons of 2018–2019 in selected Southern Mistbelt Forests of KwaZulu-Natal and the Eastern Cape, South Africa. A series of camera-trap surveys over 21 days were conducted in conjunction with surveys of microhabitat structural covariates. During the wet season, percentage of leaf litter cover, short grass cover, short herb cover, tall herb cover and saplings 0–2 m, stem density of trees 6–10 m and trees 16–20 m were significant structural covariates for influencing Lemon Dove occupancy. In the dry season, stem density of 2–5 m and 10–15 m trees, percentage tall herb cover, short herb cover and 0–2 m saplings were significant covariates influencing Lemon Dove occupancy. Stem density of trees 2–5 m and 11–15 m, percentage of short grass cover and short herb cover were important site covariates influencing Orange Ground-thrush occupancy in the wet season. Our study highlighted the importance of a diverse habitat structure for both forest species. A high density of tall/mature trees was an essential microhabitat covariate, particularly for sufficient cover and food for these ground-dwelling birds. Avian forest specialists play a vital role in providing ecosystem services perpetuating forest habitat functioning. Conservation of the natural heterogeneity of their habitat is integral to management plans to prevent the decline of such species.

scholarly journals Barking up the right tree: comparative use of arboreal and terrestrial artificial refuges to survey reptiles in temperate eucalypt woodlands

2018 ◽  
Vol 45 (2) ◽  
pp. 185 ◽  
Author(s):  
Damian R. Michael ◽  
Daniel Florance ◽  
Mason Crane ◽  
Wade Blanchard ◽  
David B. Lindenmayer
Keyword(s):  
Survey Methods ◽  
Natural Habitat ◽  
Basal Area ◽  
Agricultural Landscapes ◽  
Mature Trees ◽  
Detection Rates ◽  
Closed Cell ◽  
Eastern Australia ◽  
Non Destructive ◽  
Cell Foam

Context Artificial refuges (cover boards) are a popular method to survey and monitor herpetofauna worldwide. However, one limitation of using artificial refuges in terrestrial environments is the low detection rates of arboreal species. Furthermore, destructive search techniques can damage critical microhabitat such as exfoliating rock or flaking bark of mature trees. Aim We tested a non-destructive, passive method of sampling arboreal reptiles in fragmented agricultural landscapes in south-eastern Australia. Methods We installed 84 artificial bark refuges consisting of strips of non-toxic, closed-cell foam attached to eucalypt trees in 13 patches of remnant vegetation. We used Bayesian statistics to compare differences in detection rates among artificial bark refuges, terrestrial artificial refuges and active searches of natural habitat over a 4-year period. Key results Active searches combined with terrestrial artificial refuges detected the highest number of reptile species, including several cryptic fossorial species. Artificial bark refuges detected, on average, 132 times more individuals of the arboreal southern marbled gecko, Christinus marmoratus, than did terrestrial refuges. Gecko abundance patterns were related to tree characteristics such as tree size, bark thickness and stand basal area, as well as survey year. Conclusions Traditional survey methods such as terrestrial cover boards, in combination with active searches of natural habitat, may significantly underestimate counts for arboreal gecko species. Implications Artificial bark refuges provide a cost-effective, non-destructive and durable method for surveying and monitoring arboreal reptiles in woodland environments over short to medium time frames. Foil-backed, closed-cell foam has broad application for use in spatial capture–recapture studies and long-term monitoring of arboreal reptiles. This method also may be effective for procuring records of threatened arboreal geckos or as a solution for providing temporary habitat in ecological restoration projects.

Stakeholders' perceptions on developing sustainable Red Sanders (Pterocarpus santalinus L.) wood trade in Andhra Pradesh, India

2013 ◽  
Vol 26 ◽  
pp. 43-53 ◽  
Author(s):  
Sidhanand Kukrety ◽  
Puneet Dwivedi ◽  
Shibu Jose ◽  
Janaki R.R. Alavalapati
Keyword(s):  
Andhra Pradesh ◽  
Pterocarpus Santalinus ◽  
Red Sanders

scholarly journals Association of “Candidatus Phytoplasma australiense” with Sudden Decline of Cabbage Tree in New Zealand

Plant Disease ◽  
2001 ◽  
Vol 85 (5) ◽  
pp. 462-469 ◽  
Author(s):  
Mark T. Andersen ◽  
Ross E. Beever ◽  
Paul W. Sutherland ◽  
Richard L. S. Forster
Keyword(s):  
New Zealand ◽  
Rrna Gene ◽  
Mature Trees ◽  
Nested Polymerase Chain Reaction ◽  
Transmission Electron ◽  
Adult Trees ◽  
Leaf Yellowing ◽  
Pcr Products ◽  
One Step ◽  
Cabbage Tree

Sudden decline of the New Zealand cabbage tree (Cordyline australis) results in the rapid death of affected plants within months of first external symptoms becoming apparent. Symptoms, which have been observed in saplings and mature trees, include vascular discoloration and leaf yellowing followed by leaf desiccation and eventual plant collapse. Previous work failed to link the disease with any causal agent. A phytoplasma has now been detected in all symptomatic saplings and some symptomatic trees tested, using one-step and nested polymerase chain reaction (PCR) to amplify portions of the 16S rRNA gene. This phytoplasma was not detected in nonsymptomatic plants. Phytoplasma DNA was found in shoot and rhizome apices, leaves and wood tissue of saplings, and in the rhizome apex and trunk tissues of adult trees. Sequencing of the PCR products from selected samples indicated that the phytoplasma is “Candidatus Phytoplasma australiense.” Phytoplasma cells were detected by transmission electron microscopy in phloem sieve tubes of the rhizomes of affected saplings. One sapling with early symptoms recovered after injection with tetracycline antibiotic, but two saplings with advanced symptoms did not recover. It is concluded that “Candidatus Phytoplasma australiense” is present in symptomatic plants and is the cause of sudden decline.

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