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Impact of Climatic Factors and Soil Quality on the Abundance and Population Density of Collembola in the Rajshahi University Campus, Bangladesh

Md. Shahinur Islam
Institute of Food and Radiation Biology, Atomic Energy Research Establishment, G.P.O. Box-3787, Dhaka-1000, Bangladesh

Mosharrof Hossain
Department of Zoology, University of Rajshahi, Rajshahi-6205, Bangladesh

M Hossain
Institute of Food and Radiation Biology, Atomic Energy Research Establishment, G.P.O. Box-3787, Dhaka-1000, Bangladesh

M Yasmin
Institute of Food and Radiation Biology, Atomic Energy Research Establishment, G.P.O. Box-3787, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

The present study was conducted to know the impact of abiotic factors on the abundance and density of the collembolan population in the Rajshahi University Campus from March 2012 to February 2013. A total of 3749 individuals of Collembola were collected and they were identified into three families and five species and three genera, viz; Entomobyra albocincta, Dicranocentroides indicus, Seira indica, Lepidocyrtus lignorum, Lepidocyrtus sp (Entomobryidae), Salina sp. & Salina tricolor (Paronellidae), and Tomocerus sp (Tomoceridae). Five different habitats; Open grassland, Shady grassland, Crop field margin, Roadside vegetation and Pondside vegetation were selected for the collection of Collembola. The temperature was positively correlated with abundance and density of Collembolan population (r = 0.622, P<0.05) and where relative humidity (r = -0.114, P<0.05) and rainfall (r = 0.06, P<0.05) was negatively correlated. The abundance of soil Collembola population were indicated strong positive correlation with Organic materials (r = 0.618, P<0.05), Nitrogen (r = 0.607, P<0.05), Phosphorus (r = 0.927, P<0.05), Potassium (r = 0.824, P<0.1), Sulfur (r = 0.663, P<0.05) and very week negative correlation with Zinc (r = -0.383, P<0.05) and PH (r = -0.301, P<0.05) respectively. The highest mean abundance of vegetation dwelling collembolan was recorded in the Roadside vegetation (44.15±14.53) and lowest was in Shady grassland (11.12±4.17); however, maximum soil living Collembola was found in the Crop field margin (44±14.84) and minimum was in the Open grassland (27±8.36).

Keywords: Climatic factors, Collembola, Population density, Rajshahi University, Springtails, Abundance, Rainfal

Location: Rajshahi University Campus

Start Date: 00-03-2012

End Date: 00-02-2013

Program Area: Conservation and Biodiversity

Commodity: Plant

Objectives:

In the present study, seasonal variation, and population dynamics of collembolan population in the different habitats, their abundance and density against variety of abiotic factors have been investigated.

Methodology:

Study area Collembola were collected from Rajshahi University Campus area. RU is located in Rajshahi, a city in north-western Bangladesh. The geographical distribution of Rajshahi is 24° North and 89° east. It is situated in the South-Western part of Rajshahi division. Area of RU is 753acres/303 hector. It lies on the northern bank of the river Padma. Methodology and Data collection In this study Collembola were collected from five different types of habitats; Open grassland, Shady grassland, Crop field margin, Roadside vegetation and Pondside vegetation. Collembola were collected by Aspirator and Berlese funnel. Vegetation living Collembola was collected by Aspirator and Collembola from soil was collected by Berlese funnel. In each habitat, soil cores of 100 cm³ were collected. Collembola were preserved in 70% alcohol in vial. The monthly data of temperature, relative humidity and rainfall were collected from the field observation through the hygrometer. The data of rainfall were collected from the Meteorological center of Rajshahi. For observing the relationship of soil Collembola population with soil elements we have performed soil test from five habitats in the Soil Institute of Rajshahi and analyzed following elements, Nitrogen (%), Phosphorus (ppm), Potassium (me/100g), Sulfur (ppm), Zinc (ppm), PH, and Organic materials (%). Taxonomical identification Springtails were identified at the species level according to Key in this study. Taxonomic classification is based on the annotated checklist of the Indian collembolan and checklist of collembolan of the world (www.collembola.org/). Statistical analysis Correlation was calculated at 5% level of significance.

Source of Information: Journal of Entomology and Zoology Studies 2018; 6(1): 1119-1125 E-ISSN: 2320-7078 P-ISSN: 2349-6800

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In the study we observed that both climatic factors and soil properties have the cumulative effect on the density of Collembola population. Seasonal patterns drastically influenced the both surface and soil dwelling Collembola. Surface and Soil living Collembola showed a consistent but fluctuations occurred with the changing of climate. However, Collembola population can adjust to these changes successfully. Collembola population was available with more nitrogen and organic materials content soil which indicates their role in the decomposing process. In our mediocre study, we try to evaluate the impact of abiotic factors on collembolan population density and their abundance in leaf litter and soil.

Knowledge Management: Journal