Reproductive effort and success in Bombax ceiba L. in a tropical forest of Mizoram, Indo-Burma region of North-East India

2016 ◽  
Vol 40 (1) ◽  
pp. 157-166
Author(s):  
Vinod Prasad Khanduri ◽  
Kewat Sanjay Kumar
Keyword(s):  
Tropical Forest ◽  
Reproductive Effort ◽  
North East India ◽  
North East

Effect of rodents on seed fate of five hornbill-dispersed tree species in a tropical forest in north-east India

2009 ◽  
Vol 25 (5) ◽  
pp. 507-514 ◽  
Author(s):  
Nandini Velho ◽  
Aparajita Datta ◽  
Kavita Isvaran
Keyword(s):  
Tropical Forest ◽  
Tree Species ◽  
Camera Traps ◽  
Seed Fate ◽  
Seed Survival ◽  
North East India ◽  
North East ◽  
Wide Range ◽  
Dysoxylum Binectariferum ◽  
Seed Fates

Abstract:Hornbills are important dispersers of a wide range of tree species. Many of these species bear fruits with large, lipid-rich seeds that could attract terrestrial rodents. Rodents have multiple effects on seed fates, many of which remain poorly understood in the Palaeotropics. The role of terrestrial rodents was investigated by tracking seed fate of five hornbill-dispersed tree species in a tropical forest in north-east India. Seeds were marked inside and outside of exclosures below 6–12 parent fruiting trees (undispersed seed rain) and six hornbill nest trees (a post-dispersal site). Rodent visitors and seed removal were monitored using camera traps. Our findings suggest that several rodent species, especially two species of porcupine were major on-site seed predators. Scatter-hoarding was rare (1.4%). Seeds at hornbill nest trees had lower survival compared with parent fruiting trees, indicating that clumped dispersal by hornbills may not necessarily improve seed survival. Seed survival in the presence and absence of rodents varied with tree species. Some species (e.g. Polyalthia simiarum) showed no difference, others (e.g. Dysoxylum binectariferum) experienced up to a 64% decrease in survival in the presence of rodents. The differing magnitude of seed predation by rodents can have significant consequences at the seed establishment stage.

Impact of Roadside Pollution on Microbial Activities in Sub-Tropical Forest Soil of North East India

2010 ◽  
Vol 4 (3) ◽  
pp. 280-287 ◽  
Author(s):  
S.R. Joshi ◽  
R. Kumar ◽  
P. Saikia ◽  
R.K. Bhagobaty ◽  
S. Thokchom
Keyword(s):  
Tropical Forest ◽  
Forest Soil ◽  
Microbial Activities ◽  
North East India ◽  
North East ◽  
Tropical Forest Soil ◽  
Roadside Pollution

scholarly journals Seasonal variation of evapotranspiration and its effect on the surface energy budget closure at a tropical forest over north-east India

2019 ◽  
Vol 128 (5) ◽  
Author(s):  
Pramit Kumar Deb Burman ◽  
Dipankar Sarma ◽  
Ross Morrison ◽  
Anandakumar Karipot ◽  
Supriyo Chakraborty
Keyword(s):  
Seasonal Variation ◽  
Surface Energy ◽  
Tropical Forest ◽  
Energy Budget ◽  
Surface Energy Budget ◽  
North East India ◽  
North East

scholarly journals Flower Pollinator Interactions within Two Tropical Tree Species of Mizoram, North East India

2016 ◽  
Vol 8 (2) ◽  
pp. 256-262
Author(s):  
Kewat Sanjay KUMAR ◽  
Vinod Prasad KHANDURI
Keyword(s):  
Tropical Forest ◽  
Foraging Behaviour ◽  
North East India ◽  
North East ◽  
Flowering Season ◽  
Functional Dynamics ◽  
The Family ◽  
Floral Visitors ◽  
Tropical Forest Ecosystem ◽  
High Level

Understanding the interactions between plants and pollinators is vital in exploring the structural and functional dynamics of tropical forest ecosystem. Such interactions are also helpful in resolving issues of regeneration, maintenance of biodiversity and conservation of tropical forest resources. The aim of this study was to understand the foraging behaviour of floral visitors of two valuable forest species in North East India, viz. Schima wallichii Choisy and Lagerstroemia speciosa (L.) Pers. The types and behaviour of pollinators were assessed by counting of the total number of visits by insects during day time (05:00-18:00) per field visit/flower in the peak flowering season, foraging rate (number of flowers visited/minutes) and average time spent per flower. The frequency of pollinator visits was also determined in terms of visits/flower/hour. Ten species belonging to seven families were recorded visiting S. wallichii flowers. The flowers of L. speciosa were mainly visited by three species in the family Apidae and one species in the family Calliphoridae. Various moth and bee species were involved in pollination of S. wallichii flowers. The Xylcopa spp. of bee showed a high level of functional synchronisation with the floral morphology of L. speciosa.

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