Ecology, Environment and Conservation Paper

Vol 23, Issue 1, 2017; Page No.(331-339)

DYNAMICS OF AQUATIC INSECTS IN THE MANDAKINI RIVER OF UTTARAKHAND, INDIA

Gunjan Goswami and Deepak Singh

Abstract

Aquatic insects are very important for aquatic ecosystem contributing mostly as secondary producers and also bioindicators determining the health of the ecosystem. River ecosystems of Himalaya experience flash floods every year destroying the aquatic biodiversity. Biodiversity lost due to flash floods in monsoon recovers soon keeping in view. The importance of diversity and paucity of information on benthic insects diversity of Mandakini river, the present work was conducted. River Mandakini is a perennial and glacier fed tributary of river Alaknanda which originates from Chaurabari glacier above the Kedarnath peakes (6940m. a.s.l.). Three sampling sites, Kund (998m. a.s.l.), Agastmuni (760m. a.s.l.) and Rudraprayag (620m. a.s.l.) were selected for the study. Sampling for benthic insects and physico-chemical parameters were done every month from January 2014 to December 2014. Aquatic insects belonging to 7 orders and 28 families were found in Mandakini river. Trichoptera was found to be the most abundant order (36%) followed by Ephemeroptera (32%) and Diptera (26%). Aquatic insect diversity was found to be maximum (3.462±0.400) in winter reflecting good quality of river water and minimum (1.269±0.855) in rainy season due to high water velocity, high amount of silt, low transparency and disturbed substratum due to frequent flash floods in monsoon. The high density and diversity of aquatic insects in winter was attributed to low water velocity, high transparency, optimum water temperature, high dissolved oxygen, low turbidity and suitable composition of bottom substrates. The Shannon-Wiener diversity index reaching above 3.0 in winter indicated a good recovery of the benthic insect population. Canonical Correspondence Analysis (CCA) revealed that a myriad of physico-chemical factors like dissolved oxygen, total alkalinity, free CO2, pH, water transparency, water velocity, water temperature, total hardness and dissolved phosphates affect the benthic insects abundance.

Enter your contact information below to receive full paper.
Your Name :
Email:
Phone:
City:
Cost of Full Paper: Rs.75 for Indian Nationals or $20 (USD) for international subscribers.
By clicking on Request Paper you Agree to pay the above mentioned cost per paper.
  
Journal Issues
Vol 23, Issue 2, 2017
Vol 23, Issue 1, 2017
Vol 23, Feb 2017 Suppl. Issue
Vol 22, Dec 2016 Suppl. Issue
Vol 22, Issue 4, 2016
Vol 22, Sept. Suppl. Issue , 2016
Vol 22, Issue 3, 2016
Vol. 22, June Suppl. Issue 2016
Vol 22, Issue 2, 2016
Vol. 22, April Suppl. Issue 2016
Vol 22, Issue 1, 2016
Vol 21, Issue 4, 2015
Vol. 21 Dec. 2015 Suppl. Issue
Vol. 21 Nov. 2015 Suppl. Issue
Vol 21, Issue 3, 2015
Vol 21, Issue 2, 2015
Vol. 21 Suppl.Issue August 2015
Vol 21.Suppl.Issue June 2015
Vol 21, Issue 1, 2015
Supplement Issue, Dec. 2014
Special Issue-2014
Vol 20, Issue 4, 2014
Vol 20, Issue 3, 2014
Vol 20, Issue 2, 2014
Vol. 20 Issue 01, 2014
Vol. 19 Issue 04, 2013
Vol. 19 Issue 03, 2013
Vol. 19, Issue 02, 2013
Vol. 19, Issue 01, 2013
Vol.18, Issue 04, 2012
Vol.18, Issue 3, 2012
Vol.18, Issue 2, 2012
Vol.18, Issue 1, 2012
Vol.17, Issue 4, 2011
Vol.17, Issue 3, 2011
Vol.17, Issue 2, 2011
Vol.17, Issue 1, 2011
Vol.16, Issue 4, 2010
Vol.16, Issue 3, 2010
Vol.16, Issue 2, 2010
Vol.16, Issue 1, 2010
Vol.15, Issue 04, 2009
Vol.15, Issue 03, 2009
Vol.15, Issue 02, 2009
Vol.15, Issue 1, 2009
Vol.14, Issue 04, 2008
Vol.14, Issue 2-3, 2008
Vol.14, Issue 2-3, 2008
Vol.14, Issue 1, 2008
Vol.14, Issue 2-3, 2008
Vol.13, Issue 04, 2007
Vol.13, Issue 2, 2007
Vol.13, Issue 1, 2007
Vol.12, Issue 4, 2006
Vol.12, Issue 3, 2006
Vol.12, Issue 2, 2006
Vol.12, Issue 1, 2006
Vol.12, Issue 01, 2006
Vol.11, Issue 3,4, 2005
Vol.11, Issue 2, 2005
Vol.11, Issue 1, 2005
Vol.10, Issue 04, 2004
Vol.10, Issue 03, 2004
Vol.10, Issue 02, 2004
Vol.10, Issue 01, 2004
Vol.09, Issue 04, 2003
Vol.09, Issue 03, 2003
Vol.09, Issue 02, 2003
Vol.08, Issue 04, 2002
Vol.08, Issue 03, 2002
Vol.08, Issue 01, 2002
Vol.07, Issue 04, 2001
Vol.07, Issue 03, 2001
Vol.07, Issue 02, 2001
Vol.07, Issue 01, 2001
Vol.06, Issue 04, 2000
Vol.06, Issue 03, 2000
Vol.06, Issue 02, 2000
Vol.06, Issue 01, 2000
Vol.05, Issue 04, 1999
Vol.05, Issue 03, 1999
Vol.05, Issue 02, 1999
Vol.05, Issue 01, 1999
Vol.04, Issue 1,2, 1998
Vol.03, Issue 3,4, 1997
Vol.03, Issue 01, 1997
Vol.02, Issue 1,2, 1996
Vol.01, Issue 14, 1995
Looking for Past Issues? Click here to get them!!