PhD Theses (SACON)

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Author: search.filters.author.Azeez, P.A.Subject: search.filters.subject.andhra Pradesh

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    Nutrients and Metals in Soils and Vegetation of Araku, Andhra Pradesh, India
    (SACON, 2010) Chandra, Rachna; Azeez, P.A.
    Industrialization and urbanization in past few decades have caused tremendous ecological repercussions, which could be best seen in mining/extractive industry. India is endowed with a wide range of mineral wealth, and large scale mining activities are happening in various places in the country. Some important effects due to mining activities are the change in land use pattern and the associated changes in distribution of plants, animals, water bodies and soil system. Reclamation and reforestation of mined out areas have become necessary due to stern environmental laws in effect in the country, although exceptions are widely seen. The vegetation grown in mine sites is anticipated to accumulate or selectively exclude/tolerate high levels of toxic metals. Several of the soil characteristics can be playing important role in mobility of nutrients and metals in soil system. Thus, knowledge about these soil properties becomes obligatory as assessment of their distribution on a spatio-temporal scale would help better understand their likely mobility and bioavailability. The present investigation undertaken in three proposed mining locations at Araku, Andhra Pradesh, India during 2006 through 2008 is an attempt to examine the nutrients, alkali and alkaline earth metals, select heavy metals across the soil layers, and also alkali and alkaline earth metals, and select heavy metals in organs of select predominant plant species in the area. These species were primarily screened out on the basis of their ability so that they can be used during the initial stages of mine restoration programme, after the mining activities are ceased. As hyperaccumulators take up particularly high amounts of metals in their shoots, an attempt was made to assess the trace and heavy metal from view point of Transportation index (Ti = (metal concentration in leaf] / [metal concentration in root]) in various organs/compartments of the select plant species naturally occurring in the area.