scholarly journals Seasonal diversity of soil microarthropods in two different vegetable plots of Aligarh-India

2019 ◽  
Author(s):  
Mohammad Jalaluddin Abbas ◽  
Hina Parwez
Keyword(s):  
Solanum Melongena ◽  
Significant Negative Correlation ◽  
Edaphic Factors ◽  
Available Nitrogen ◽  
Soil Microarthropods ◽  
Faunal Diversity ◽  
Habitat Difference ◽  
Seasonal Diversity ◽  
One Year ◽  
Ph Level

AbstractSoil microarthropods are intimately linked with health and fertility of soil as well as plant productivity. In India, despite their rich faunal diversity, information on soil microarthropods diversity and interactions with variety of edaphic factors is extremely limited. The present study has been carried out to observe seasonal diversity of soil microarthropods in two different vegetable plots at Aligarh. The two vegetable plots chosen in this study where predominantly Tomato (Lycopersicom esculentum) and Brinjal (Solanum melongena, family-Solaneceae) have been grown and sapling has been sown in the month of April when plants attained a height of approximately 6″. The samples were collected randomly from a depth of 5cm. @ of four samples per month for a period of one year. All microarthropods extracted with the help of Tullgren funnel apparatus. Among soil microarthropods collected, Collembolans have highest average monthly density (15.20 inds./sample) in brinjal plot and greatest abundance (18.7inds./sample) in tomato plot. A highly significant negative correlation was recorded between Collembolans population with reference to soil temperature (r = −0.867, P<0.05), whereas available nitrogen showed a positive correlation (r = 0.847, P>0.05). Interestingly, at neutral pH level, the highest population of Collembolans as well as Acari(mites) were recorded. During spring and winter months, there was a peak population buildup of Collembola and Acarina, whereas a sharp decline was recorded in summer months. So, this study clearly establishes that habitat difference as well as edaphic factors plays an important role along with seasonal parameters on their diversity.

scholarly journals Diversity and relative abundance of Collembola in a wheat (Triticum aestivum) field at Aligarh

2019 ◽  
Author(s):  
Mohammad Jalaluddin Abbas ◽  
Hina Parwez
Keyword(s):  
Relative Abundance ◽  
Agricultural Soils ◽  
Uttar Pradesh ◽  
Climatic Conditions ◽  
Soil Samples ◽  
Available Nitrogen ◽  
Soil Microarthropods ◽  
Wheat Field ◽  
Investigation Period ◽  
Ph Level

AbstractCollembolans are novel indicators of soil quality as they are enormously diversified in agricultural soils. However, their abundance is ever dynamic due to the dynamic climatic conditions. In order to ascertain the diversity and relative abundance of Collembola associated with wheat field, soil samples were taken at weekly intervals from selected field of Quarsi village located at Aligarh district of Uttar Pradesh (India). Total 20 samples were taken for the site study during the investigation period and soil microarthropods extracted by using modified Tullgren funnel apparatus. The results of our study showed that, the species diversity of Collembolans mainly consists of individuals belonging to family Entomobryoidae, Isotomidae, Hypogastruridae and Sminthuridae. Among these, Hypogastrurides were dominant (56.84 %) in entire community of Collembola. Soil temperature was negatively correlated (r = −0.932, P<0.05) with reference to Collembolans population, whereas soil moisture (r = 0.502, P>0.05) as well as available nitrogen (r = 0.656, P>0.05) both were positively correlated. The highest population of Collembolans was recorded at neutral pH level. In terms of numbers of soil microarthropods, Collembolans apparently constituted a better population than the other diverse group of soil microarthropods such as Acari(mites). The present study has shown profound diversity of Collembolans and highlights the significance of the variety of chemical and edaphic factors which regulate the fluctuation and diversity of microarthropods in a varied manner.

scholarly journals Effects of Land-Use Change on Soil Functionality and Biodiversity: Toward Sustainable Planning of New Vineyards

Land ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 358
Author(s):  
Elena Gagnarli ◽  
Giuseppe Valboa ◽  
Nadia Vignozzi ◽  
Donatella Goggioli ◽  
Silvia Guidi ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Soil Quality ◽  
Soil Biodiversity ◽  
Soil Microarthropods ◽  
Quick Recovery ◽  
Sustainable Planning ◽  
Soil Functionality ◽  
One Year ◽  
Soil Microarthropod

Sustainable agriculture largely depends on soil biodiversity and requires efficient methods to assess the effectiveness of agronomic planning. Knowledge of the landscape and relative pedosite is enriched by data on the soil microarthropod community, which represent useful bio-indicators for early soil-quality detection in land-use change (LUC). In the hilly Maremma region of Grosseto, Italy, two areas, a >10ys meadow converted into a vineyard and an old biodynamic vineyard (no-LUC), were selected for evaluating the LUC effect. For maintaining soil vitality and ecosystem services by meadow, the vineyard was planted and cultivated using criteria of the patented “Corino method”. The aim was to evaluate the LUC impact, within one year, by assessing parameters characterizing soil properties and soil microarthropod communities after the vineyard was planted. The adopted preservative method in the new vineyards did not show a detrimental impact on the biodiversity of soil microarthropods, and in particular, additional mulching contributed to a quick recovery from soil stress due to working the plantation. In the short term, the adopted agricultural context confirmed that the targeted objectives preserved the soil quality and functionality.

Integrated Evaluation on Soil Nutrients in Spring Maize (Zea mays) Field Subjected to Limited Irrigation

2013 ◽  
Vol 389 ◽  
pp. 67-72
Author(s):  
Heng Jia Zhang ◽  
Jun Hui Li
Keyword(s):  
Soil Nutrients ◽  
Irrigation Management ◽  
Soil Nutrient ◽  
Fuzzy Mathematics ◽  
Available Nitrogen ◽  
Maize Field ◽  
Spring Maize ◽  
Significant Difference ◽  
One Year ◽  
The Membership Function

An experiment was conducted to explore the integrated evaluation on soil nutrients in spring maize field subjected to limited irrigation (LI) in oasis region. The soil organic matter (SOM), soil total and available nitrogen (STN and SAN) and phosphorus (STP and SAP), and soil available potassium (SAK) in 0~40 cm increment at harvest of maize subjected to LI were selected as the evaluation factors to calculate the weighing coefficient of each soil nutrient and the IEI for soil nutrients using the membership function in fuzzy mathematics. At maize harvest, differences were not significant (p>0.05) in SOM, STN, STP, SAP, and SAK within 0~40 cm increment among treatments and CK, but significant difference (p<0.05) was found in SAN, with the maximum SAN maintained in MI5, which was respectively 187.3%, 96.8%, and 41.2% higher over MI2 valued the minimum, MI1, and CK. The IEI was improved by 12.4% to 22.3% in all the other treatments and CK compared to the minimum marked in MI4, with the maximum valued in MI3 treatments. Therefore, after one year experiment, the optimized irrigation management was maintained in MI3 treatment due to its maximum IEI in all the LI regimes.

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 Ichthyo-faunal diversity of Morang district, Nepal

Our Nature ◽  
2017 ◽  
Vol 15 (1-2) ◽  
pp. 55-67
Author(s):  
Bharat Raj Subba ◽  
Nelson Pokharel ◽  
Manish Raj Pandey
Keyword(s):  
Fish Species ◽  
Water Bodies ◽  
Paddy Fields ◽  
Stream Fishes ◽  
Faunal Diversity ◽  
One Year ◽  
Schizothorax Plagiostomus

The present paper attempts to report a total of 118 fish species spread over 11 orders, 26 families and 64 genera inhabited indifferent water bodies viz, rivers, reservoirs, streams, ponds, lakes, canals, ditches, paddy fields of Morang district, collected during a one-year survey. The order Cypriniformes is the richest one among 11 orders that comprises 59 species followed by Siluriformes having 31 and Perciformes with 19 representatives, respectively. Orders Anguilliformes, Osteoglossiformes, Beloniformes, Cyprinodontiformes, Synbranchiformes and Tetraodontiformes have only one representative. Olyra longicaudata is the new report from Morang district and the second report from Nepal. Besides this, other hill-stream fishes viz., Pseudecheneis sulcatus, Schizothorax plagiostomus, Schistura savona and Neolissochilus hexagonolepis recorded during the survey, also have not been previously reported from this district.

A Double-Blind Comparison of Lithium Carbonate and Maprotiline in the Prophylaxis of the Affective Disorders

1976 ◽  
Vol 128 (5) ◽  
pp. 479-485 ◽  
Author(s):  
Alec Coppen ◽  
S. A. Montgomery ◽  
R. K. Gupta ◽  
J. E. Bailey
Keyword(s):  
Plasma Levels ◽  
Affective Disorders ◽  
Lithium Carbonate ◽  
Significant Negative Correlation ◽  
High Plasma ◽  
Double Blind ◽  
Dosage Regime ◽  
Blind Comparison ◽  
One Year ◽  
Morbidity Index

SummaryA double-blind prospective study was carried out comparing the prophylactic effect of maprotiline and lithium carbonate over a period of one year in patients suffering from recurrent affective disorders. The average Affective Morbidity Index was lower, but not significantly so, in patients treated with lithium. A further analysis, based on dividing patients into those with no affective morbidity and those who showed some affective morbidity during the study, demonstrated lithium carbonate to be significantly superior to maprotiline both in the group as a whole and in unipolar depressives. A correlation between high plasma maprotiline concentration and low morbidity was observed and was in line with an earlier report. A highly significant negative correlation (r = −0.97; p < 0.001) was found between plasma maprotiline concentration and body weight. Although the results showed lithium carbonate to be superior to maprotiline in the study, it should be emphasized that the plasma levels of lithium were constantly monitored and maintained at what is considered to be its optimum concentration, whereas the maprotiline treated patients were kept on a fixed dosage regime irrespective of plasma levels.

scholarly journals Influence of crop species and edaphic factors on the distribution and abundance of trichoderma in alfisol soils of southern India

2014 ◽  
Vol 73 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Vellaisamy Muniappan ◽  
Thangavelu Muthukumar
Keyword(s):  
Relative Abundance ◽  
Abiotic Factors ◽  
Morphological Characteristics ◽  
Significant Negative Correlation ◽  
Edaphic Factors ◽  
Crop Species ◽  
Trichoderma Species ◽  
Soil P ◽  
Fungal Abundance ◽  
Dry Soil

Abstract The effect of crop species and edaphic factors on the distribution of Trichoderma species in Alfisol soil under different agrosystems was evaluated. Each soil sample was assayed for nine abiotic factors and culturable microfungal populations. Fungal abundance was determined by dilution plate technique, and the identification of fungi was based on morphological characteristics. Pearson’s correlation coefficient was used to determine the relationship of association between these factors and the presence and abundance of Trichoderma species in each soil type. The abundance of soil fungi ranged between 7.0 × 103 and 13.6 × 103 colony forming units (cfus) per gram of dry soil. The population densities of the two Trichoderma species (T. koningii and T. viride) isolated in the present study varied significantly with crop species and their abundance (varied from 0.6 to 3.6 × 103 cfus g-1 dry soil). Twenty-two other colony-forming fungal types with an abundance ranging between 7.0 × 103 and 13.6 × 103 cfus g-1 dry soil were also isolated in the present study. As soil pH negatively influenced relative abundance of T. koningii, soil P and relative abundance of T. viride were significantly and positively correlated to each other. Further, relative abundance of T. koningii was significantly and positively correlated to relative abundance of Aspergillus fumigatus but negatively correlated to relative abundance of Stachybotrys atra. Likewise, a significant negative correlation existed between relative abundance of T. viride and Absidia glauca.

scholarly journals The value of urinary uric acid and creatinine ratio in neonatal asphyxia

2020 ◽  
Vol 7 (8) ◽  
pp. 425-429
Author(s):  
Dr. Nikhil Gupta ◽  
◽  
Dr. Alka Bhambri ◽  
Dr. Vedika A Bhat ◽  
Dr. Rashmi Katyal ◽  
...  
Keyword(s):  
Uric Acid ◽  
Cord Blood ◽  
Prospective Observational Study ◽  
Umbilical Artery ◽  
Perinatal Asphyxia ◽  
Significant Negative Correlation ◽  
Creatinine Ratio ◽  
Spot Urine ◽  
Neonatal Asphyxia ◽  
One Year

Objective: The value of urinary uric acid and creatinine ratio in neonatal asphyxia. Method: This was a prospective observational study conducted over one year, on 45 newborns admitted in NICU with perinatal asphyxia. Cord blood from the umbilical artery was sent for pH analysis and urinary uric acid and creatinine levels were estimated in spot urine samples. Results: The urinary uric acid and creatinine ratio had a positive correlation with low APGAR scores at the 1st and 5th minute. Also, urinary uric acid to creatinine ratios was significantly higher in infants with severe HIE (3.18±0.61) when compared with infants of moderate HIE (2.19±0.32). It showed a significant negative correlation with pH of cord blood in neonates with perinatal asphyxia. Conclusion: The urinary uric acid and creatinine ratio can be used as a supportive diagnostic test for early diagnosis of perinatal asphyxia.

scholarly journals Diversity of Soil Dwelling Collembola in a Forest, Vegetable and Tea Ecosystems of Assam, India

2021 ◽  
Vol 13 (22) ◽  
pp. 12628
Author(s):  
Sudhansu Bhagawati ◽  
Badal Bhattacharyya ◽  
Binoy K. Medhi ◽  
Snigdha Bhattacharjee ◽  
Himangshu Mishra
Keyword(s):  
Land Use ◽  
Forest Ecosystem ◽  
Landscape Planning ◽  
Management Strategies ◽  
Organic Carbon Content ◽  
Land Uses ◽  
Edaphic Factors ◽  
Land Use Pattern ◽  
Seasonal Diversity ◽  
The Impact

Land use change has a great impact in determining the diversity patterns of soil fauna. Adoption of any land use pattern significantly affects the soil structure and its physico-chemical characteristics, which often leads to the loss of biodiversity. Considering the collembolans as the key organism in the indicator shopping basket of soil environment, the response of Collembola communities under three different land uses represented by forest, vegetable and tea ecosystems was studied. Collembolans were sampled at monthly intervals using Tullgren funnel and identified by standard taxonomic keys. Diversity analysis and soil chemo-edaphic factors were studied to establish the impact of different land uses on Collembola communities. Five genera of Collembola viz., Cyphoderus, Entomobrya, Isotoma, Folsomia and Hypogastrura were recorded from the forest ecosystem whereas Folsomia was completely absent in vegetable ecosystem and the tea ecosystem soil was devoid of both Folsomia and Hypogastrura. Seasonal diversity and density of Collembola were recorded to be higher in the forest ecosystem indicating the presence of relatively stable habitats as compared to vegetable and tea ecosystems showing relatively disturbed habitats. Correlation studies between different chemo-edaphic factors and collembolan population revealed that the moisture and organic carbon content of soil had significant positive correlation during all the four seasons in all the ecosystems studied. Higher adoption of mechanical and chemo-centric agriculture depletes the available resources of the soil and makes it less habitable and conducive for the growth and sustenance of collembolans in vegetable and tea ecosystem as compared to forest. Appropriate landscape planning, land management strategies and developing proper methods of land use practices may pave the way for the improvement of collembolan diversity at landscape level.

scholarly journals Radiocarbon signature reveals that most springtails depend on carbon from living plants

2021 ◽  
Vol 17 (9) ◽  
pp. 20210353
Author(s):  
Saori Fujii ◽  
Takashi F. Haraguchi ◽  
Ichiro Tayasu
Keyword(s):  
Food Webs ◽  
Carbon Cycling ◽  
Feeding Habits ◽  
Significant Negative Correlation ◽  
Trophic Levels ◽  
Soil Microarthropods ◽  
Soil Food Webs ◽  
Animal Feeding ◽  
Taxonomic Groups ◽  
Isotope Analyses

Terrestrial carbon cycling is largely mediated by soil food webs. Identifying the carbon source for soil animals has been desired to distinguish their roles in carbon cycling, but it is challenging for small invertebrates at low trophic levels because of methodological limitations. Here, we combined radiocarbon ( 14 C) analysis with stable isotope analyses ( 13 C and 15 N) to understand feeding habits of soil microarthropods, especially focusing on springtail (Collembola). Most Collembola species exhibited lower Δ 14 C values than litter regardless of their δ 13 C and δ 15 N signatures, indicating their dependence on young carbon. In contrast with general patterns across all taxonomic groups, we found a significant negative correlation between δ 15 N and Δ 14 C values among the edaphic Collembola. This means that the species with higher δ 15 N values depend on C from more recent photosynthate, which suggests that soil-dwelling species generally feed on mycorrhizae to obtain root-derived C. Many predatory taxa exhibited higher Δ 14 C values than Collembola but lower than litter, indicating non-negligible effects of collembolan feeding habits on the soil food web. Our study demonstrated the usefulness of radiocarbon analysis, which can untangle the confounding factors that change collembolan δ 15 N values, clarify animal feeding habits and define the roles of organisms in soil food webs.

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