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Praveen Karanth, K.
- An Island Called India:Phylogenetic Patterns across Multiple Taxonomic Groups Reveal Endemic Radiations
Abstract Views :273 |
PDF Views:82
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1 Centre for Ecological Sciences, Indian Institute of Science, Bengaluru 560 012, IN
1 Centre for Ecological Sciences, Indian Institute of Science, Bengaluru 560 012, IN
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Current Science, Vol 108, No 10 (2015), Pagination: 1847-1851Abstract
Island systems from around the world have provided fascinating opportunities for studies pertaining to various evolutionary processes. One recurring feature of isolated islands is the presence of endemic radiations. In this regard, the Indian subcontinent is an interesting entity given it has been an island during much of its history following separation from Madagascar and currently is isolated from much of Eurasia by the Himalayas in the north and the Indian Ocean in the south. Not surprisingly, recent molecular studies on a number of endemic taxa from India have reported endemic radiations. These studies suggest that the uniqueness of Indian biota is not just due to its diverse origin, but also due to evolution in isolation. The isolation of India has generated some peculiarities typically seen on oceanic islands. However, these patterns might be confined to groups with low dispersal ability.Keywords
Biogeography, Indomalayan Region, Intrusive Elements, Island Radiation, Molecular Data.Full Text
- Species Complex, Species Concepts and Characterization of Cryptic Diversity:Vignettes from Indian Systems
Abstract Views :237 |
PDF Views:73
Authors
Affiliations
1 Centre for Ecological Sciences, Indian Institute of Science, Bengaluru 560 012, IN
1 Centre for Ecological Sciences, Indian Institute of Science, Bengaluru 560 012, IN
Source
Current Science, Vol 112, No 07 (2017), Pagination: 1320-1324Abstract
Species are one of the fundamental units of evolution and to this date, are largely described based on morphological characters. However, with the advent of molecular tools it has become apparent that many widely distributed species harbour cryptic diversity. Nevertheless, delimiting the members of such complexes is a challenge given these species exhibit very little or no morphological differences among them. In this regard, approaches that use multiple lines of evidence for species delimitation have gained ascendency. Here, I review a few recent studies from India, where application of an integrative approach has provided us with new insights into the systematics and evolution of these groups. Further, I discuss the implications of this approach on taxonomy in particular, and on ecological and evolutionary research in general.Full Text
- Capturing Richness-Independent Phylogenetic Diversity and Testing Surrogates in Woody Plant Communities
Abstract Views :317 |
PDF Views:81
Authors
Affiliations
1 Centre for Ecological Sciences, Indian Institute of Science, Bengaluru - 560012, IN
1 Centre for Ecological Sciences, Indian Institute of Science, Bengaluru - 560012, IN
Source
Current Science, Vol 115, No 5 (2018), Pagination: 910-919Abstract
Phylogenetic diversity (PD) indices quantify the evolutionary history of a community. Studies have shown how decoupling between taxon richness (TR) and PD provides useful insights into biodiversity. The present study on three dry deciduous forest patches (Nandi, Savandurga and Devarayandurga) shows such decoupling patterns. Our analysis of unique (endemic) taxa revealed that whereas the high PD in Nandi was contributed largely by its unique taxa which were composed of different evolutionary lineages, unique taxa in Savandurga contributed negatively due to highly shared lineages. Also, the use of higher-level TR did not provide an adequate surrogate for PD. We, therefore, propose the use of an integrative approach (both TR and PD) to quantify biodiversity for gaining better insights into the composition and evolutionary history of a community.Keywords
Biodiversity, Community Phylogenetics, Conservation, Deciduous Forest.Full Text
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