Lichen as bioindicator

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prasad dash

Jan 19, 2011, 4:02:54 AM1/19/11
Dear all keeping in view of the ongoing climatic variation, it is very demanding to study the lichen distribution as they are the key bioindicators in an ecosystem. The lichens are very less tolerant to pollution load and immediately they respond to any kind of stress by their presence and absence. The crustose lichens tolerate the maximum pollution load where as both foliose and fructicose lichens do the least. As Lichen diversity is maximum in Sal tree (Shorea robusta) which harbours almoast 64 species followed by Mango (Mangifera indica) and Sindur (Mallotus philipensis) and these are very common tree in almost all part of India, one can easily observe the type of epiphytic lichens growing there to study the dynamics of pollution load in their respective local ambience by the presence/absence and appearance/vanishing of lichens without any chemical analysis. Elimination of large number of lichen species in an area is an indicator of growing environmental pollution, as lichen cannot tolerate the acidic gases. Thus in areas with high acidic gases, a few resistant species will occur. The pollution-tolerant species exhibit aggressive behaviour spreading rapidly, covering a variety of substrates. I have collected 45 species of lichens from different parts of Orissa as epiphytes on Sal tree which are varrying in their diversity and distribution. Thus the number and distribution of  lichen species on Shorea robusta can be utilized as indicator species for carrying out rapid future biomonitoring studies in the area.

Prasad Kumar Dash
Ecologist, Orissa, India
ph. 09437444241

tanay bose

Jan 19, 2011, 8:16:54 AM1/19/11
to prasad dash,
Thanks for sharing this important piece of information
Tanay Bose
Research Assistant & Teaching Assistant.
Department of Botany.
University of British Columbia .
3529-6270 University Blvd.
Vancouver, B.C. V6T 1Z4 (Canada)
Phone: 778-323-4036 (Mobile)
           604-822-2019 (Lab)
           604-822-6089  (Fax)

Rashida Atthar

Jan 19, 2011, 8:50:48 AM1/19/11
to tanay bose, prasad dash,
Very educative and interesting piece of information, thankyou for sharing Prasad ji.

Ushadi micromini

Dec 15, 2011, 8:21:40 PM12/15/11
to prasad dash, efloraofindia
Mr. Dash:
Searching for ecology in our forum.. ran into this..
very important information... thanks...
did you study these in details?

can you share photos .. groosw on the trees, then dissecting scope
level and micros if possible..

by now its almost a year since this post... your data I hope is
already published or submitted to the funding agency... so I am sure
you can share some with us..

Usha di

> email:
> ph. 09437444241

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