Ecology of collembola in a deciduous forest floor of Birbiium District, West Bengal in relation to soil moisture

1978 ◽  
Vol 12 (2) ◽  
pp. 265-274 ◽  
Author(s):  
A. K. Hazra
Keyword(s):  
Soil Moisture ◽  
Forest Floor ◽  
West Bengal ◽  
Deciduous Forest

scholarly journals Microarthropod population dynamics in a subtropical deciduous forest of the Eastern-Ghat hill range in India in response to variation in edaphic factors

2020 ◽  
Author(s):  
Pratik Acharya ◽  
Suryasikha Samal ◽  
C.S.K. Mishra
Keyword(s):  
Soil Moisture ◽  
Deciduous Forest ◽  
Principal Component ◽  
Vital Role ◽  
Population Variation ◽  
Edaphic Factors ◽  
Eastern India ◽  
Wet Season ◽  
Nutrient Pool ◽  
Soil Microarthropods

Abstract Background: Soil microarthropods are considered as major groups of soil fauna which facilitate the decomposition of organics in soil. In forests, the sustenance of nutrient pool is dependent on the density and diversity of these animals. Edaphic factors of habitat play vital role in species distribution of any region. Any changes in population structure of microarthropod may affect the ecosystem adversely. This study reports the seasonal variation of microarthropod population of the orders Collembola, Acari and Hymenoptera in five sampling zones, degraded (DF), dense mixed (DMF), open mixed (OMF), bamboo (BF) and wet land (WL) in a subtropical deciduous forest (Chandaka-Dampara) of Eastern India. Results: Seven species of Collembola and four species each of Acari and Hymenoptera were identified. Ecological indices did not show noticeable species diversity in different sampling zones of the forest. Heatmap analysis indicated high relative abundance of Collembola in WL irrespective of season. The abundance of Acari was high in OMF and DF, Hymenoptera in DMF and OMF for dry and wet season respectively. Wet season indicated significantly higher microarthropod population irrespective of species. The correlation colour matrix and principal component analysis (PCA) showed significant positive correlation of arthropod population with soil moisture and organic carbon. Significant population variation in the animal population were observed between dry and wet seasons. Conclusion: The forest floor was dominated by Collembola order of microarthropod species irrespective of sampling zone and season. Soil moisture and carbon contents in different seasons were found to be most sensitive growth regulators of microarthropod populations In Chandaka forest of Eastern India.

scholarly journals Localized basal area affects soil respiration temperature sensitivity in a coastal deciduous forest

2020 ◽  
Vol 17 (3) ◽  
pp. 771-780 ◽  
Author(s):  
Stephanie C. Pennington ◽  
Nate G. McDowell ◽  
J. Patrick Megonigal ◽  
James C. Stegen ◽  
Ben Bond-Lamberty
Keyword(s):  
Soil Moisture ◽  
Soil Respiration ◽  
Spatial Variability ◽  
Temperature Sensitivity ◽  
Large Scale ◽  
Deciduous Forest ◽  
Basal Area ◽  
Soil Surface ◽  
Study Sites ◽  
Positive Effect

Abstract. Soil respiration (Rs), the flow of CO2 from the soil surface to the atmosphere, is one of the largest carbon fluxes in the terrestrial biosphere. The spatial variability of Rs is both large and poorly understood, limiting our ability to robustly scale it in space. One factor in Rs spatial variability is the autotrophic contribution from plant roots, but it is uncertain how the presence of plants affects the magnitude and temperature sensitivity of Rs. This study used 1 year of Rs measurements to examine the effect of localized basal area on Rs in the growing and dormant seasons, as well as during moisture-limited times, in a temperate, coastal, deciduous forest in eastern Maryland, USA. In a linear mixed-effects model, tree basal area within a 5 m radius (BA5) exerted a significant positive effect on the temperature sensitivity of soil respiration. Soil moisture was the dominant control on Rs during the dry portions of the year, while soil moisture, temperature, and BA5 all exerted significant effects on Rs in wetter periods. Our results suggest that autotrophic respiration is more sensitive to temperature than heterotrophic respiration at these sites, although we did not measure these source fluxes directly, and that soil respiration is highly moisture sensitive, even in a record-rainfall year. The Rs flux magnitudes (0.46–15.0 µmol m−2 s−1) and variability (coefficient of variability 10 %–23 % across plots) observed in this study were comparable to values observed in similar forests. Six Rs observations would be required in order to estimate the mean across all study sites to within 50 %, and 518 would be required in order to estimate it to within 5 %, with 95 % confidence. A better understanding of the spatial interactions between plants and microbes, as well as the strength and speed of above- and belowground coupling, is necessary to link these processes with large-scale soil-to-atmosphere C fluxes.

scholarly journals LITTER CONTRIBUTION ON DIFFERENT GEOMORPHOLOGICAL CONDITIONS IN THE ATLANTIC FOREST – STATE OF RIO DE JANEIRO, BRAZIL

FLORESTA ◽  
2019 ◽  
Vol 49 (3) ◽  
pp. 373
Author(s):  
Victória Maria Monteiro Mendonça ◽  
Gilsonley Lopes Santos ◽  
Marcos Gervasio Gervasio Pereira ◽  
Carlos Eduardo Gabriel Menezes
Keyword(s):  
Leaf Litter ◽  
Forest Floor ◽  
Rio De Janeiro ◽  
Deciduous Forest ◽  
Abiotic Factors ◽  
Nutrient Content ◽  
Litter Production ◽  
Forest Fragments ◽  
Small Sites ◽  
Leaf Litter Production

The deposition of leaf litter on the forest floor is influenced by biotic and abiotic factors where forest fragments are inserted, which is a major source of nutrients to the soil. The objective of this study was to evaluate the influence of the change in relief conditions (landform) in leaf litter contribution and nutrient content in a Submontane Seasonal Semi-deciduous Forest in Pinheiral (state of Rio de Janeiro, Brazil). It was selected two adjacent landforms with convex and concave relief type and they divided into small sites (SS), obeying the variation of the slope and topographic gradient. Five conic collectors with an area of 0.2834 m² were installed in each SS, totaling 30 collectors. The collections of leaf litter were carried out every 30 days during a year. The material retained in the traps was separated as the fractions; leaves, twigs, reproductive and other material to assess the proportion of each fraction in the leaf litter production and nutrient content of the fraction leaves. The contribution and nutrient content of litter are influenced by the type of landform and seasons of the year. The highest contribution was observed in the dry season, in the lower and middle SS of the landforms, and the highest nutrient levels occurred in the convex landform during the rainy season.

scholarly journals Effect of biochar addition on leaf-litter decomposition at soil surface during three years in a warm-temperate secondary deciduous forest, Japan

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yukiya Minamino ◽  
Nobuhide Fujitake ◽  
Takeshi Suzuki ◽  
Shinpei Yoshitake ◽  
Hiroshi Koizumi ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Forest Floor ◽  
Nutrient Dynamics ◽  
Forest Ecosystems ◽  
Deciduous Forest ◽  
Soil Surface ◽  
Leaf Litter Decomposition ◽  
Dry Conditions

AbstractThe addition of biochar to the forest floor should facilitate efficient carbon sequestration. However, little is known about how biochar addition effects litter decomposition, which is related to carbon and nutrient dynamics in forest ecosystems. This study evaluated the effect of biochar addition on leaf litter decomposition in a forest ecosystem. To examine whether leaf litter decomposition was stimulated above and below biochar, litterbag experiments were carried out for about 3 years in a field site where biochar was added at the rate of 0, 5 and 10 t ha−¹ (C0, C5 and C10 plots) to the forest floor in a temperate oak forest, Japan. Biochar addition at C10 significantly enhanced litter decomposition below biochar for 2 years after treatment and above biochar for 1 year after treatment. Litter water content in biochar plots tended to increase under dry conditions. Biochar addition enhanced litter decomposition because of increased microbial activity with increased moisture content and accelerated the decomposition progress rather than changing the decomposition pattern. However, the carbon emission through changing leaf litter decomposition was small when compared with the carbon addition by biochar, indicating that biochar could be an effective material for carbon sequestration in forest ecosystems.

scholarly journals Community structure of Coleoptera in Bethuadahari Wildlife Sanctuary, West Bengal, India

Check List ◽  
2017 ◽  
Vol 13 (3) ◽  
pp. 2154
Author(s):  
Paramita Basu ◽  
Gautam Aditya ◽  
A. K. Sanyal
Keyword(s):  
Community Structure ◽  
Relative Abundance ◽  
West Bengal ◽  
Deciduous Forest ◽  
Tropical Deciduous Forest ◽  
Species Assemblage ◽  
Wildlife Sanctuary ◽  
The Family

We focused on the coleopteran species assemblage in a tropical deciduous forest in the Bethuadahari Wildlife Sanctuary, West Bengal, India. During a 2-year survey, we collected 56 species belonging to 13 families of Coleoptera, in varying relative abundance. Among the species, 15 belong to the family Chrysomelidae, nine to the Staphyllinidae, and four to the Coccinellidae. Our results substantiate the importance of the Bethuadahari Wildlife Sanctuary for the conservation of coleopteran insects.

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