Effect Of Heavy Metal Pollution of Highway Origin on Soil Nematodes Guilds in North Shenyang, China

Eects of heavy metal pollution of highway origin on soil nematode guilds
in North Shenyang, China
HAN Dechang, ZHANG Xiaoke, TOMAR Vijay Vikram Singh,
LI Qi, WEN Dazhong, LIANG Wenju

Abstract
Soil samples were collected with distance at 5, 20, 40, 80, 160, and 320 m from the Shen-Ha (Shenyang-Harbin) Highway, Northeast China, to investigate the eect of heavy metals of highway origin on soil nematode guilds. The contents of soil Pb, Cu, Zn, and the nematode community structure were analyzed. The results showed that the contents of total and available Pb, Cu, Zn varied significantly with the dierent distances from the highway. Pb was the main pollutant in the soils in the vicinity of Shen-Ha Highway. The zone from 20 to 40 m away from the highway was the most polluted area. The highest abundance of soil nematodes was found at 5 m while the lowest at 20 m away from the highway. Thirty six genera of nematodes belonging to 23 families were identified. Nematode guilds having dierent responses to soil heavy metals were classified into four types. Soil nematode guilds may act as a prominent indicator
to heavy metal pollution of highway origin.
Key words: soil pollution of highway origin; heavy metals; soil nematode guilds

Link
http://www.scribd.com/doc/12685428/Effect-of-Heavy-Metal-pollution

Prof. Irfan Ahmad

Name : IRFAN AHMAD
Designation : Professor
Institution : Department of Zoology
Aligarh Muslim University
Aligarh 202002, India
Nationality : Indian
Academic qualifications : Ph.D., M.Phil., M.Sc., B.Sc. (Hon)
Research specialization : Nematology (Behaviour, ecology, developmental biology & taxonomy)

Summary of scientific contributions

Behaviour: Observations on reproductive behaviour showed that, depending on the species, either only males were attracted to females or both males and females were attracted to one another in response to sex pheromones. Attraction gradually declined with age. Mated females became less attractive although the response of the males was not affected. Virgins lived longer as compared to non-virgin individuals. Matings and number of sperms transferred declined with age. Males isolated showed a sharp decline in the number of matings and the total number of sperms transferred. Predation was influenced by temperature and activity of the prey; the more active were predated less. Predators were not attracted to their prey and the abundance of prey may or may not influence predation.

Biology: A stage-wise division and differentiation of the primordial cells (nuclei) and the differentiation of the extra-gonadal cells that will form the vulva and the accessory reproductive structures of the males have been detailed. A study of the early cleavage patterns in some predatory dorylaim species has shown that after the third division three basic patterns emerged. The similarities and differences in the early cleavage patterns did not indicate any phylogenetic relationship within Dorylaimoidea.

Taxonomy: The taxonomic contributions include the descriptions of 42 new species and four new genera. By SEM several new findings (structures) have been reported for the first time (post-amphidial papillae in Thalassogenus sp.; papillae around spinneret in some soil nematodes), and additional information provided for many species.

List of 10 best publication

1. AHMAD, I. & JAIRAJPURI, M.S. (1979). Sex attraction and copulation in Chiloplacus symmetricus (Nematoda:Acrobelinae). Nematologica 26: 139-148.
2. AHMAD, I. & JAIRAJPURI, M.S. (1981). Sex attraction in Cruznema lambdiensis (Nematoda:Rhabditidae). Revue Nematol. 4: 145-149.
3. AHMAD, I. & JAIRAJPURI, M.S. (1981). The copulatory behaviour of Cruznema lambdiensis (Nematoda:Rhabditidae). Revue Nematol. 4: 152-156.
4. AHMAD, I. & JAIRAJPURI, M.S. (1981). Ageing and reproduction in Cruznema lambdiensis (Nematoda:Rhabditidae). Nematologica 27: 28-33.
5. AHMAD, I. & JAIRAJPURI, M.S. (1982). Sex attraction in ageing Chiloplacus symmetricus. Nematologica 28: 121-123.
6. SHAFQAT, S., AHMAD,I. & JAIRAJPURI, M.S. (1996). Early embryonic development patterns in some predacious dorylaims. Afro-Asian J. Nematol. 6: 133-136.
7. AHMAD, W., AHMAD,I., BILGRAMI, A.L. & KHAN, Z. (1992). Thalassogenus shamimi n.sp. (Nematoda:Thalassogeneridae) a nematode predator from India. Fundam. appl. Nematol. 15: 127-131.
8. AHMAD, I., AHMAD, W. & TAHSEEN, Q. (1992). Papillae associated with the spinneret in some soil nematodes. Fundam. appl. Nematol. 15: 185-187.
9. AHMAD, I., AHMAD, W. & MAHAMOOD, MD. (2004). Pererngus nepenthi gen.n., sp.n. (Diplogastridae) from pitcher plants in Singapore. Int. J. Nematol. 14: 81-84.
10. AHMAD, I., SHAH, A.A. & MAHAMOOD, MD. (2007). Nematodes of the Order Rhabditida from India. Description of Sclerorhabditis tridentatus gen.n., sp.n. (Rhabditidae). Nematology 9: 43-47.

CONTACT

email: ahmadirfi@gmail.com

Address:

Professor Irfan Ahmad
Section of Nematology,
Department of Zoology,
Aligarh Muslim University,
Aligarh 202002 U.P. India;

Tel.: Off. (0571) 2700920-23 Ext.3433

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