scholarly journals Tree Regeneration in a Subtropical Humid Forest: Effect of Cultural Disturbance on Seed Production, Dispersal and Germination

1996 ◽  
Vol 33 (6) ◽  
pp. 1551 ◽  
Author(s):  
S. K. Barik ◽  
R. S. Tripathi ◽  
H. N. Pandey ◽  
P. Rao
Keyword(s):  
Seed Production ◽  
Tree Regeneration ◽  
Humid Forest ◽  
Subtropical Humid Forest

scholarly journals Influence of leaf litter quality on N mineralization in soils of subtropical humid forest regrowths

1998 ◽  
Vol 27 (1) ◽  
pp. 44-50 ◽  
Author(s):  
K. Maithani ◽  
A. Arunachalam ◽  
R. S. Tripathi ◽  
H. N. Pandey
Keyword(s):  
Leaf Litter ◽  
N Mineralization ◽  
Litter Quality ◽  
Humid Forest ◽  
Subtropical Humid Forest

Modelling the temporal variation in the seed production of North American trees

2004 ◽  
Vol 34 (1) ◽  
pp. 65-75 ◽  
Author(s):  
D F Greene ◽  
E A Johnson
Keyword(s):  
Probability Distribution ◽  
Temporal Variation ◽  
Seed Production ◽  
Large Fraction ◽  
Basal Area ◽  
Tree Regeneration ◽  
Narrow Strip ◽  
Area Source ◽  
Endogenous Cycles ◽  
Lognormal Probability

Many aspects of temporal variation in tree seed production (e.g., the proability distribution, periodicity, uni modality) are poorly understood. In this paper, we used 32 annual seed production records from 22 species to show that there are no discernible endogenous cycles, and there is a modest (but seldom significant) tendency for a high seed production year to be followed by an unusually low production year. Finally, we found that all of the records conformed to a single lognormal probability distribution, although our ability to discriminate among species, given short and extremely variable records, is admittedly very limited. We used the lognormal to develop the distribution of the sums of local seed production events (summed across 4 years) as an aid in predicting postharvest or postfire tree regeneration success. Our conclusion is that reliable (defined as 90% of the time) adequate stocking at the edge of an area source requires that the species of interest must comprise a very large fraction of the total basal area per area. Indeed, if the species constitutes less than about 50% of the source, neither burns nor even very narrow strip cuts will be reliably stocked.

Biomass and production of fine and coarse roots during regrowth of a disturbed subtropical humid forest in north-east India

Vegetatio ◽  
1996 ◽  
Vol 123 (1) ◽  
pp. 73-80 ◽  
Author(s):  
A. Arunachalam ◽  
H. N. Pandey ◽  
R. S. Tripathi ◽  
K. Maithani
Keyword(s):  
Coarse Roots ◽  
Humid Forest ◽  
North East India ◽  
North East ◽  
Subtropical Humid Forest

scholarly journals Seasonal dynamics of soil microbial biomass in fragmented patches of subtropical humid forest of Jaintia hills in Meghalaya, Northeast India

2019 ◽  
Vol 28 (1) ◽  
pp. e002
Author(s):  
Ngakhainii Trune Pao ◽  
Krishna Upadhaya
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Fragment Size ◽  
Microbial Biomass C ◽  
Forest Fragments ◽  
Humid Forest ◽  
Soil Microbial ◽  
Jaintia Hills ◽  
Experimental Plots ◽  
Subtropical Humid Forest

Aim of the study: The aim of the study was to assess the seasonal dynamics of microbial biomass and its contribution to soil system along a fragment size gradient in subtropical humid forest of Meghalaya.   Area of study: The study was conducted in forest fragments located at Jarain and adjoining areas in Jaintia Hills of Meghalaya, northeast India.Material and Methods: Forest fragments of sizes ranging from 3.8 to 105 ha were selected for the study and grouped into Small (< 5 ha), Medium (> 5 and < 15 ha), Large (>15 and < 50 ha) and Very Large (105 ha) classes. Three experimental plots each of 20 x 20 m were established at the forest edge and at 50 m distance assigned as ‘interior’ microsite in each of the fragments for sampling of soil. Soil samples (0-10 cm depth) from each of the experimental plots were collected in replicates on seasonal interval and microbial biomass was estimated by the fumigation extraction method.Important findings: Microbial biomass- C, -N and -P varied significantly (p< 0.05) between the fragment sizes, microsites and seasons. The microbial biomass was higher in the interior as compared to the edge. It was also high during the winter season. Overall, soil microbial biomass -C, -N and -P ranged from 260 to 969; 25 to 95 and 8 to 67 µg g-1 respectively. The contribution of microbial biomass -C, -N and -P to soil organic carbon, total Kjeldahl nitrogen and phosphorus ranged from 1.48 to 1.81 %, 2.54 to 4.54 % and 3.41 to 5.22 % respectively. Fragmentation alters the microenvironmental conditions and soil properties that in turn affect the microbial biomass. Highlights: This interaction of plant, soil and microbial community would gradually degrade in the fragments due to change in vegetation composition and structure, microclimatic conditions and soil physical and chemical properties. Our results suggests that microbial mediated ecosystem processes such as nutrient cycling are more susceptible to variation at the edge which may become unstable and unpredictable in forest fragments exposed to various human disturbances.Keywords: fragment size, microbial biomass, microenvironment, subtropical forest.

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