Mixoploidy in Strobilanthes anamallaica J.R.I.Wood (Acanthaceae Juss.) an important taxon of south-western Ghat, India

The Nucleus ◽  
2021 ◽  
Author(s):  
Reshmi Chembrammal ◽  
John Ernest Thoppil
Keyword(s):  
Western Ghat

Palaeoflood Records from Upper Kaveri River, Southern India: Evidence for Discrete Floods During Holocene

2010 ◽  
Vol 37 (-1) ◽  
pp. 49-55 ◽  
Author(s):  
Vishwas Kale ◽  
Hema Achyuthan ◽  
Manoj Jaiswal ◽  
Somasis Sengupta
Keyword(s):  
Flash Floods ◽  
Southern India ◽  
Western Ghat ◽  
Flood Events ◽  
Monsoon Precipitation ◽  
Short Term ◽  
Gradual Decline ◽  
High Discharge ◽  
Flood Level ◽  
High Flood

Palaeoflood Records from Upper Kaveri River, Southern India: Evidence for Discrete Floods During Holocene A record of six discrete middle Holocene floods has been established based on sedimentological and stratigraphical studies in the upper Kaveri catchment at Siddapur. The flood events are represented by six discrete, sharp-bounded, sand-silt couplets. Texturally and geochemically the suite of couplets is quite distinct from the overlying and underlying structureless fluvial deposits. Based on OSL ages the suite of couplets cover the Holocene from ~8 to ~2 ka. Such evidence is not present or reported from any other river originating in the Western Ghat in the Indian Peninsula. We argue that the six couplets represent short-term, high discharge events or flash floods. The initiation of this phase of flash floods broadly corresponds with the southward migration of ITCZ and a gradual decline in Indian summer monsoon precipitation starting at ~7.8 ka. Comparison of the elevation of the highest couplet with the high flood level (HFL) of the 1961 extraordinary flood on Kaveri demonstrates that the 20th century flood was higher than the mid-Holocene palaeofloods.

scholarly journals Indirect Evidences of Wildlife Activities in Shoals of Western Ghats, a Biodiversity Hotspots

2011 ◽  
Vol 45 (2) ◽  
pp. e-33-e-39
Author(s):  
Manjari Jain ◽  
Singha Utpal ◽  
S. Mukhopadhyay
Keyword(s):  
Western Ghats ◽  
Forest Cover ◽  
Western Ghat ◽  
Biodiversity Hotspots ◽  
Panthera Tigris ◽  
Cuon Alpinus ◽  
Wild Fauna ◽  
Spatial Differences ◽  
Panthera Tigris Tigris ◽  
Wild Dog

Indirect Evidences of Wildlife Activities in Shoals of Western Ghats, a Biodiversity HotspotsThe presence of wildlife fauna and its activities were ascertained with the density of the scat, dung and other markings or droppings of the wildlife abode therein. Attempt was made to find out spatial differences in the activities of the wildlife populations and to comment on the abundance of different preys and predators within shola forests of Western Ghat hill forests, a Biodiversity hotspot in India. An indirect sampling method, Transect Count Method, was employed to count dung/pellet group/scat and other markings in that area. Pachyderms were found to be mostly dominant in Varagaliar and Punnumala shola patches while scats of all the three important predators, viz., tiger (Panthera tigris tigris), Indian wild dog (Cuon alpinus) and leopard (Panthera pardus) were encountered only in Varagaliar shola. Greater abundance was recorded from Indira Gandhi Wildlife Sanctuary than Silent Valley National Park may be because of the restriction of animal movements in the former due to topographical barriers and its existence as isolated shola patches that led to a greater concentration of wild fauna in a relatively segregated forest cover.

scholarly journals In Vitro Conservation of Some Threatened and Economically Important Ferns Belonging to the Indian Subcontinent

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Shastri P. Shukla ◽  
P. B. Khare
Keyword(s):  
Indian Subcontinent ◽  
Multiple Shoot ◽  
Pteris Vittata ◽  
Western Ghat ◽  
Axillary Shoot ◽  
Mass Multiplication ◽  
Fern Species ◽  
Pityrogramma Calomelanos ◽  
Spore Culture

This study was undertaken to identify methods of mass multiplication for five ornamental, economically important ferns (Nephrolepis biserrata (Sw.) Schott., N. cordifolia cv. ‘‘duffii’’ (L.) Presl., N. exaltata cv. bostoniensis (L.) Schott., Pteris vittata L., and Cyclosorus dentatus Link.,) and three threatened ferns, namely, Cyathea spinulosa Wall. ex. Hook, Pityrogramma calomelanos (L.) Link., and Microsorum punctatum (L.) Schott., through in vitro techniques. Collections were made from different biodiversity zones of India including Northeast Himalayas, Kumaon Himalayas, and Western Ghat and successfully introduced and grown in a fern-house. Aseptic cultures were raised at the morphogenic level of callus, axillary shoot, multiple shoot, and rooted plants. An optimized medium is described for each fern species. Plantlets were also produced from spore culture of Cyathea spinulosa and successfully hardened under fern house conditions.

scholarly journals Effects of change in orientation and surface roughness of terrain oil thermally induced up slope flows in western Ghats: A numerical study

MAUSAM ◽  
2022 ◽  
Vol 46 (4) ◽  
pp. 367-376
Author(s):  
M. TIWARI ◽  
N. RAMANATHAN
Keyword(s):  
Numerical Simulation ◽  
Surface Roughness ◽  
Western Ghats ◽  
Roughness Length ◽  
Mesoscale Model ◽  
Numerical Study ◽  
Western Ghat ◽  
Thermally Induced ◽  
Slope Flow

ABSTRACT. The effect of change in orientation and surface roughness of terrain on the daytime up slope flow is investigated using a 2-dimensional mesoscale model. A realistic orography profile of western ghat is chosen for the purpose. Twelve hour of integrations are performed starting from sunrise. The numerical simulation have shown that the intensity of up slope flows remained practically unaffected by change of orientation of terrain. However, increase in roughness length decreases the intensity of developed flows. For comparison purposes, the results of previous investigators are verified with a change in slope angles.    

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