National Conference
Environment and Biodiversity of India 30th – 31st December 2011, New Delhi
[AB74] The effects of protection in Food-chain system in nature A. Priyadarshi, S. Gakkhar and Sandip Banerjee Department of Mathematics, Indian Institute of Technology Roorkee, Roorkee-247667, India Email: anupam240@gmail.com, sandofma@iitr.ernet.in ABSTRACT Natural or man-made hazards caused the extinction of biological species. The survival of species in the nature depends on many factors such as availability of food and shelter, competitive strength and adaptability. Generally, species protect themselves by using their inherited traits to take refuge from predation. Recent human activities such as deforestation, harvesting and industrialization have adversely affected the ecological balance in nature. Implicitly, they help to increase the risk of extinction of many biological species. To prevent the extinction, protection should be provided to some of the species. Several attempts are being made to counter the possibilities of extinction such as creating natural resources, imposing restriction on species harvesting, establishing protected areas, stocking etc. In this paper, two different types of protections have been provided to prey in a tri-trophic food chain model. The effects of protection on the dynamics of the model have been investigated in each case. The results are compared and some conclusion has been drawn. The extinction criteria, lower predation risk, coexistence in form of stability are some of the basis for the comparison of two results. It has been observed that protection can be used for controlling chaos and for preventing the extinction in tri-trophic food chain model. Moreover, it has been concluded that providing protection needs some care to prevent extinction of species in the nature. Keywords: Protection, Reserved Area, Stability, Chaos control. [AB75] Effect of domestication for the conservation of Artemisia myriantha var. pleiocephala, a rare temperate plant, at sub-tropical conditions. Priyanka Mishra, N. Manika, Flora Haider and G. D. Bagchi Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Lucknow–226015, India Email: priyankamishra62@gmail.com ABSTRACT Artemisia myriantha var. pleiocephala is a rare aromatic and medicinal plant. In India, it was reported from Western Himalaya between 1500-2000 m and Deccan peninsula. This plant is reported to possess anthelmintic, expectorant, antiseptic and insect repellent properties. Since, this is a rare plant, an attempt has been made to conserve, acclimatize, domesticate and evaluate the plant at the subtropical conditions of North India for future utilization. The plant exhibited enormous rapid growth and change in flowering period at sub-tropical conditions as compared to the natural temperate plants. At this condition, the plant also exhibited perennial and shrubby habit while the natural temperate plants were annual herbs. Essential oils of both natural and domesticated sub-tropical plants were analyzed and studied for the first time. Considerable changes were observed in the oil constituents after domestication. Oil of plants, found in natural habitat mainly contained chrysanthenone (7.3%) followed by δ-cadinene (5.7%) and 1, 8, cineole
© 2011. National Conference on Environment and Biodiversity of India Published by North East Centre for Environmental Education and Research (NECEER), Imphal
60