标题：5. STUDIES ON THE USE OF BRYOPHYTE DIVERSITY AND THEIR FREQUENCY DISTRIBUTION PATTERN AS AN IMPORTANT TOOL FOR MONITORING AIR QUALITY by ARUN CHAUDHARY1 AND B.L. CHAUDHARY2
期刊名称：Liminalities : a Journal of Performance Studies
电子版ISSN：1557-2935
出版年度：2016
卷号：79
页码：45 to 54-45 to 54
语种：English
出版社：Liminalities
其他摘要：Mount Abu (Map I), the only hill station in Rajasthan, is the highest peak atthe South- West end of the Aravalli range, is an isolated plateau, which isseparated from the main range by the valley of the West Banas river, andarises like a precipitous granite island from the surrounding plains ofMarwar in Rajasthan. It is a detached hill of the Aravalli ranges and issituated between 24º31′ to 24º43′ N and 72º38′ to 72º53′ E, on the border ofthe arid region of western Rajasthan. The irregular plateau is about twelvemiles in length (S. W. & N. E.) and two to three miles in breadth (S. E. &N. W.), situated at an average height of 4500ft. above the sea level. Thehighest peak is Guru Sikhar, towards the northern end being 5653 ft. abovesea level. The place is dry for the greater part of the year though thetemperature here is always ten to twenty degrees lower than that in theneighbouring plains. The annual maximum temperature being 23.9ºC andminimum 16.4ºC. The annual rainfall is about 69 inches but may vary fromyear to year. The annual mean humidity is 64% at 8.30 hrs. I.S.T. Therelative humidity reaches its maximum (99%) in the month of July andAugust. Floristically Mt. Abu is the richest spot in Rajasthan due to heavyrains, higher altitudes, and humidity.For the present study ten sites of Mt. Abu was selected for monitoring airquality. Various parameters like habitat, climate, number of species andfrequency distribution pattern for Bryophyte population at each site was analyzed. The frequency distribution pattern at each site was then used to calculate Index ofatmospheric purity (IAP). The obtained value of IAP from various sites was plotted on an outline mapof the study area to categorize the pollution gradients or the degree of pollution as a function of zoneof atmospheric purity. Automobiles are the major cause of air pollution which is evident by the factthat the common species of Bryophytes like Hyophila involuta, Stereophyllum ligulatum, Entodonprorepens, Plagiochasma appendiculatum, Asterella angusta, Riccia discolor, Cyathodium barodae,Philonotis mollis, Targionia hypophylla and Anthoceros angustas has now restricted distribution.KEY WORD: Mount Abu, Aravalli ranges, Banas River, IAP.
