Surveying macro-invertebrate diversity in the Tons river, Doon Valley, India

Abstract

A survey of macro-invertebrates and their monthly variations occupying the Tons river in Doon Valley was conducted from August 2003-July 2004.Macro-invertebrate collections and water samples were taken from three sampling stations every month during the period of study. All the hydrological attributes were measured monthly for 1 year. The present study showed that the water velocity, hydromedian depth, turbidity and dissolved oxygen and nature and size of the bottom substrates do play a major role in determining the macro-invertebrate diversity of Tons river. The ecological relevance of the measured hydrological attributes was investigated by comparing their degree of correlation with invertebrate density and diversity. The Shannon-Wiener index (H 0 ) of macro-invertebrates was found to be highest (3.60) during spring season (February and March) and lowest (2.59) during monsoon season (July and August). The high values of diversity index of macro-invertebrates at all the three sampling sites indicate diverse macro-invertebrate communities in the Tons river in Doon Valley, India.

Local determinants influencing stream water quality

“…High dissolved oxygen was recorded during winter season which may be due to high photosynthetic rate of phytoplankton communities in clear water that results in higher values of dissolved oxygen (Sharma and Rathore 2000;Ravindra et al 2003). Higher dissolved oxygen in winter season and lower oxygen in monsoon were also recorded in Haraz River in Iran (Pejman et al 2009), many rivers of Gangetic plain, India (Rani et al 2011), and several rivers of the Central Himalayas including the Chandrabhaga River (Sharma and Sharma 2007) and the Tons River (Sharma et al 2009).…”

Study of ecology and interrelationship of parameters in two Ecologically Different Beels in Gangetic plain of West Bengal, India

“…Higher dissolved oxygen in winter season and lower oxygen in monsoon were also recorded in Haraz River in Iran (Pejman et al, 2009), many rivers of Gangetic plain, India (Rani et al, 2011) and several rivers of the Central Himalayas including the Chandrabhaga River (Sharma et al, 2007) and the Tons River (Sharma et al, 2009). The presence of limestone rocks results in higher pH (Ormerod et al, 1990).…”

Application of Benthic Macroinvertebrates as Potential Bio-Indicators in Malaysian's Rivers: Gap and Bibliometric Analyses

“…Also, they can act as an index of measure or a model that categorizes aquatic ecosystem health (Manickavasam et al, 2019). In particular, benthic macroinvertebrates are considered useful bio-indicators for environmental changes in many aquatic ecosystems (Belal et al, 2016) due to their high biodiversity, minimal mobility, relatively long life cycle, bottom-dwelling nature, and immense sensitivity to environmental changes (Flores & Zafaralla, 2012;Jun et al, 2012;Tampus et al, 2012;Dacayana et al, 2013;Sharma et al, 2013;Selvanayagam & Abril, 2016). To date, the utilization of benthic macroinvertebrates as bio-indicators has garnered significant attention in global river monitoring programs, including those in Malaysia (Gallacher, 2001;Resh, 2007;Narangarvuu et al, 2014;Tan & Beh, 2015).…”