scholarly journals Estimating gross primary productivity of a tropical forest ecosystem over north-east India using LAI and meteorological variables

2017 ◽  
Vol 126 (7) ◽  
Author(s):  
Pramit Kumar Deb Burman ◽  
Dipankar Sarma ◽  
Mathew Williams ◽  
Anandakumar Karipot ◽  
Supriyo Chakraborty
Keyword(s):  
Tropical Forest ◽  
Primary Productivity ◽  
Forest Ecosystem ◽  
Gross Primary Productivity ◽  
Meteorological Variables ◽  
North East India ◽  
North East ◽  
Tropical Forest Ecosystem

scholarly journals Biomass Production Assessment in a Protected Area of Dry Tropical forest Ecosystem of India: A Field to Satellite Observation Approach

2021 ◽  
Vol 9 ◽  
Author(s):  
Tarun K. Thakur ◽  
Digvesh K. Patel ◽  
Anita Thakur ◽  
Anirudh Kumar ◽  
Arvind Bijalwan ◽  
...  
Keyword(s):  
Climate Change ◽  
Carbon Sequestration ◽  
Tropical Forest ◽  
Primary Productivity ◽  
Forest Ecosystem ◽  
Net Primary Productivity ◽  
Mixed Forest ◽  
Vegetation Types ◽  
C Storage ◽  
Tropical Forest Ecosystem

In recent decades, degradation and loss of the world’s forest ecosystems have been key contributors to biodiversity loss and future climate change. This article analyzes plant diversity, biomass, carbon sequestration potential (CSP), and the net primary productivity (NPP) of four vegetation types viz., Dense mixed forest (DMF); Open mixed forest (OMF); Teak plantation (TP), and Sal mixed forest (SMF) in the dry tropical forest ecosystem of central India through remote sensing techniques together with physical ground observations during 2013–2018. The total C storage in trees varied from 16.02 to 47.15 Mg ha−1 in studied vegetation types with the highest in DMF and lowest in OMF. The total C storage in stem wood, branches, and foliage falls in the range of 52.93–78.30%, 9.49–22.99%, and 3.31–12.89% respectively. The total standing biomass varied from 83.77 to 111.21 Mg ha−1 and these variations are due to different vegetation types, with the highest in DMF followed by TP, SMF while the lowest was estimated in OMF. The net primary productivity (NPP) [aboveground (AG) + belowground (BG)] varied from 7.61 to 9.94 Mg ha−1 yr−1 with mean values of 8.74 Mg ha−1 yr−1 where AG shares a maximum contribution of 77.66%. The total biomass production was distributed from 64.09 to 82.91% in AG and 17.08–35.91% in BG components. The present study outlines that the studied forest ecosystem has the substantial potential of carbon sequestration and a great possibility of mitigating local and global climate change.

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.

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.

Termite Assemblage Pattern and Niche Partitioning in a Tropical Forest Ecosystem

2015 ◽  
Vol 44 (3) ◽  
pp. 546-556 ◽  
Author(s):  
Hou-Feng Li ◽  
Yen-Chiu Lan ◽  
Ikuko Fujisaki ◽  
Natsumi Kanzaki ◽  
How-Jing Lee ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Forest Ecosystem ◽  
Niche Partitioning ◽  
Tropical Forest Ecosystem
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