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

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Chenchu Ankalaiah
http://orcid.org/0000-0003-2877-1969
Thondaladinne Mastan
http://orcid.org/0000-0001-6246-8766
Mullangi Sridhar Reddy
http://orcid.org/0000-0003-3511-3083

Abstract

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.

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How to Cite
[1]
Ankalaiah, C., Mastan, T. and Reddy, M.S. 2017. 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. Journal of Threatened Taxa. 9, 9 (Sep. 2017), 10669–10674. DOI:https://doi.org/10.11609/jott.2869.9.9.10669-10674.
Section
Communications
Author Biographies

Chenchu Ankalaiah, Department of Environmental Science, Yogi Vemana University, Kadapa, Andhra Pradesh 516216, India

C. Ankalaiah is presently working as junior project fellow in MOEF&CC project and he was actively involved in field work and manuscript preparation. 

Thondaladinne Mastan, Department of Environmental Science, Yogi Vemana University, Kadapa, Andhra Pradesh 516216, India

T. Mastan is presently working as junior project fellow in UGC project and pursuing PhD work and he has participated equally in field work and as well in manuscript preparation.

Mullangi Sridhar Reddy, Department of Environmental Science, Yogi Vemana University, Kadapa, Andhra Pradesh 516216, India

Dr. M. Sridhar Reddy is working as Assistant Professor. His interests are forest ecology and forest management.  He has contributed to the manuscript in the form of field work and manuscript preparation.  

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