Biomonitoring of Water and Waste Water by Anju Agrawal & Krishna Gopal

Author:Anju Agrawal & Krishna Gopal
Language: eng
Format: epub
Publisher: Springer India, India

Presence of unique aquatic biota

Diversity of aquatic habitats

Presence of protected areas, areas of natural heritage and pristine areas, which are crossed by the main water course in the basin

Sensitivity of aquatic ecosystems to flow reduction

Considering that most of the ‘ecological’ attention in countries like India has so far been given to fish, such indicators as rare and endangered biota and unique biota are calculated here using available fish data. Rare and endangered fish species are first identified using IUCN (1994) categories such as CR (critically endangered) and EN (endangered). Their cumulative number is then expressed as the proportion of the total number of fish species found in a river basin. The assessment of diversity of aquatic habitats and sensitivity of aquatic ecosystems to flow reduction requires expert judgment and knowledge of a particular river. Presence of protected or pristine areas can be assessed against existing guidelines for protected area management, that is, IUCN (1980), which sets the aim of 10% of the basin to be protected. The second question to be asked relates to what the river system looks like at present, compared to a reference condition in the past or compared to some similar and relatively undisturbed subbasins in the same physiographic settings. The indicators used in this study include:Percentage of the watershed remaining under natural vegetation cover types

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