Biodiversity of Earthworm Resources in Gangetic Plain of Uttar Pradesh, India
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Tropical Natural History 10(1): 53-60, April 2010 ©2010 by Chulalongkorn University Biodiversity of Earthworm Resources in Gangetic Plain of Uttar Pradesh, India DEEPSHIKHA VERMA, SHACHI BHARTI AND YADAV SHWETA * Vermiculture Research Station, Department of Zoology, D.S. College, Aligarh – 202001, INDIA *Corresponding author. E-mail: [email protected] Received: 8 October 2009; Accepted: 30 December 2009 ABSTRACT.– Based on an extensive survey of Gangetic Plain of Uttar Pradesh during August – October 2008, the communication reports 11 taxa of earthworms, namely, Eutyphoeus incommodus, E. orientalis, E. pharpingianus, E. waltoni, Lampito mauritii, Metaphire anomala, M. birmanica, M. posthuma, Pellogaster bengalensis, Perionyx sansibaricus, Polypheretima elongata belonging to 6 genera and 2 families that were commonly found in the study area. This constitutes 2.6 per cent of total Indian earthworm fauna. Of these, 4 taxa are exotic with extra-Indian origin. Collection and environmental information on each occurrence of a species are given. The study contributes first-hand material on earthworm fauna of the study area, thus far neglected, and likely to add more native species to the existing ones, which are very specific for vermicomposting processes. KEY WORDS: biodiversity, earthworm, agro-climatic zones, Gangetic Plain, India INTRODUCTION been cleared on a large scale primarily for agricultural practices, construction and other Earthworms (folk names, include dew- developmental activities. Changes in land worm, rain worms, night crawler, angle use pattern have directly affected the worm, and Kechua, Giduala, in Uttar composition and population structure of Pradesh) are important biological resources earthworm communities in different agro- that have a tremendous potential in agro- climatic regions of the country (Blanchart ecosystems because they significantly affect and Julka, 1997; Behera et al., 1999; soil physical structures and organic matter Bhadauria et al., 2000). Native species are dynamics, and promote plant growth (Lee, threatened because of rapid and extensive 1985; Lavelle et al., 1988). India is a diverse destruction of their natural habitats. country harbouring a very high diversity of During the last few decades, the earthworms, mostly concentrated in Western earthworms of the Indian subregion have Ghats and Eastern Himalayas both of which been studied to some extent, such as the are recognized as biodiversity ‘hot spots’. Eastern Himalayas (Julka, 1975a, 1976a, Although this area is only 2% of the world’s 1977, 1981); Khasi and Garo hills (Julka, land mass, it supports about 105 per cent of 1977); Orissa (Julka, 1976b, 1978); South the total known global earthworm diversity, India (Jamieson, 1977); Eastern Himalayas estimated at 4000 species. (Julka and Rao, 1982); Western Himalayas The Indian earthworm fauna is (Julka, 1979; Halder, 1980); Andaman and predominantly composed of native species, Nicobar Islands (Julka and Halder, 1975a; which constitute about 89% of total Sotta and Halder, 1980). However, the earthworm diversity in the country (Julka Gangetic Plains of Uttar Pradesh have been and Paliwal, 2005). Forests in India have more or less neglected as compared to other 54 TROPICAL NATURAL HISTORY 10(1), APRIL 2010 FIGURE 1. Study area: Gangetic Plain of U.P., India. parts of the country. Further, earthworms contemporary earthworm fauna of the study have gained renewed scientific attention in area. India and abroad because of their wide The Indo-Gangetic Alluvial plains (IGP) application in the production of vermicom- is among the most extensive fluvial plains post, and as sources of animal protein for of the world and cover several states of the domesticated animals. However, out of 418 northern, central and eastern part of India. species of earthworms known from the The IGP occupies total area of approxi- country (Julka and Paliwal, 2005) only half mately 43.7 m hectare and represent eight a dozen are frequently used for vermiculture agro-ecological regions (AER) and 14 agro- and vermicomposting. Therefore, there is an ecological subregions. The area of the IGP urgent need to undertake extensive survey is nearly 13% of the total geographical area of earthworms in such unexplored areas of the country (Pal et al., 2009). with a view to (i) study their biodiversity; The Gangetic Plain of Uttar Pradesh (ii) search for more native species which from which data were derived is situated may be used for vermicomposting; (iii) between 23° 52’ and 31° 28’ N latitudes and contributing material for preparation of an 77° 3’ and 84° 39’ E longitudes (Fig.1) are earthworm inventory of the study area and; highly fertile with alluvial soils having flat (iv) suggest measures for their conservation topography broken by numerous ponds, and protection, particularly the species lakes and rivers slopes. Climate of the area which are either threatened or on the verge is tropical with wide variation because of of extinction. The present attempt, therefore, dissimilarity in altitudes ranging from 200 is to provide a preliminary inventory of the to 550 metre. The minimum and maximum temperature ranges from 3°c to 4°c and 43 VERMA ET AL. — BIODIVERSITY OF EARTHWORM IN UTTAR PRADES 55 TABLE 1. Survey record of Earthworm biodiversity in Gangetic Plain of U.P. Date(s) of survey Zone Collection no. Districts covered 18.08.08 to 25.08.08 South-western semidry D/01 to D/42 Aligarh, Agra, Etah, region Mathura 21.08.08 to 03.09.08 Western plain B/43 to B/57 Bulandshahar, Hapur, Meerut 03.09.08 to 04.09.08 Mid western E/58 to E72 Badaun, Bareilly, Moradabad 08.09.08 to 10.09.08 Mid region C/73 to C/87 Kanpur, Lucknow, Unnao 09.09.08 to 12.09.08 Eastern region H/88 to H102 Azamgarh, jaunpur, Varanasi 10.09.08 to 19.09.08 Vidarv I/103 to I/117 Chandoli, Mirzapur, Sonbhadra 18.09.08 to 21.09.08 North east G/18 to G/132 Basti, Gorakhpur, Santkabirnagar 14.10.08 to 16.10.08 Tarai A/133 to A/147 Lakheempur kheri, Pilibhit, Rampur 16.10.08 to 18.10.08 Bundelkhand region F/148 to F/162 Banda, Chittrakut, Jhansi to 45°c for the months of January and May Earthworm sampling.– Earthworm for respectively, with mean annual rainfall 120- taxonomic studies were collected by the 160 cm falling mostly in the monsoon digging and hand sorting method. Samples season from June to September. The area is were taken from diverse ecological niches bound in the west by the Indus river and on of the study area. the south by the Vindhya mountain range. The methodology adopted for earthworm The vegetation of area is mainly dry collection was based on Julka (1988). deciduous (Khan, 2002; Kumar et al., 2002). Collected worms were washed in fresh The preferential habitat types from which water and stored in test tubes in the field. collections were made included grasslands Ethyl alcohol was gradually added to the (grazed and ungrazed), mixed forests, river test tube and then transferred to the dish banks, dung heap, orchards and cultivated containing a solution of 5% formalin for fields in the plots located in 236, 286 square fixation and kept for a period 6-8 hrs, kilometers of study area. followed by their preservation in 70% ethyl alcohol or 5% formalin. All specimens were MATERIALS AND METHODS serially numbered and necessary field data such as habitat, locality, soil texture, colour In the course of fieldwork, the authors and occurrence recorded. visited different districts encompassing the Earthworms were identified with the help various agro-climatic zones of the study of monographs and other available literature area viz, South Western semidry region, on the subject (Stephenson, 1923; Gates, Western plain, Mid Western, Mid region, 1972; Julka, 1988) at the Vermiculture Eastern region, Vidarv, North east, Tarai, Research Station (VRS), D.S. College, and Bundelkhand region of the study area Aligarh and later confirmed by experts at during August – October 2008 (Table 1). Zoological Survey of India, Kolkata. Voucher specimens of all specimens 56 TROPICAL NATURAL HISTORY 10(1), APRIL 2010 TABLE 2. Results of soil samples analysis. Results of soil analysis Sl. Collection sites Organic carbon no. Soil texture Moisture % pH content % 1. Aligarh Loamy 25-30 4.01 6.94 2. Basti Sandy 20-25 3.15 7.02 3. Banda Sandy 28-30 3.82 7.52 4. Badaun Clay 40-42 4.58 6.63 5. Chandauli Loamy 28-30 1.55 7.73 6. Etah Sandy 20-25 3.14 7.18 7. Gorakhpur Clay 25-30 2.52 7.11 8. Hapur Loamy 25-30 6.68 6.80 9. Jaunpur Clay 25-30 3.49 7.13 10. Jhasi Sandy 28-30 1.76 7.31 11. Mathura Sandy-Loam 28-30 1.54 6.76 12. Mirzapur Clay 26-28 2.39 7.68 13. Rampur Loamy 28-30 3.90 6.69 14. Sonbhadra Loamy 20-25 2.14 7.71 examined and reported in the present work Mathura: D/16, D/17; Badaun: E/63 to are deposited in the Museum of VRS, for E/65; Jhansi: F/149; Banda: F/153, future reference and study. F/154; Basti: G/118, G/119, G/122; Gorakhpur: G/129, G/130, G/132; Analysis of soil samples.– Soil samples Jaunpur: H/94, H/97; Mirzapur: I/103, collected from various study sites were I/104; Sonbhadra: I/108, I/111; analyzed for soil texture by international Chandoli: I/116. pipette method (Piper, 1966), moisture by Date of collection: 18.08.08 to 17.10.08. oven drying method (Santhanam et al. General habitat: Grassland (unglazed), 1989), pH by digital meter (Misra, 1968) , cultivated land (paddy crop). and total organic matter by Walkley and Black’s method (1934) and the data is 2) Eutyphoeus orientalis; Octochaetidae presented in Table 2.