Environmental factors affecting the distribution of Chironomid larvae of the Seybouse wadi, North-Eastern Algeria

Submitted: 17 October 2012
Accepted: 27 December 2012
Published: 27 March 2013
Abstract Views: 2641
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A survey of the Seybouse wadi (North-Eastern Algeria) between 2008 and 2011 was conducted in 26 sampling sites located on the main river and its tributaries using chironomids. From 3264 collected larvae, forty-five chironomid species were identified, and were correlated to 13 environmental variables to predict determinant factors affecting their distribution. Indicator value (IndVal) analysis was first performed to determine indicator chironomid species according to several factors (sites, seasons, source distance, granulometry, conductivity, water temperature, dissolved oxygen, water velocity, pollution and the abundance of filamentous algae). Co-inertia analysis (CoIA) supported the IndVal results, emphasising an upstream/downstream gradient in the first axis, while a granulometry gradient was emphasised by the second axis. A pollution gradient was also highlighted in the plane of the first two axes, separating tolerant Chironomus sp. 1, Cricotopus bicinctus and Cricotopus (Isocladius) sylvestris from intolerant species as Phaenopsectra flavipes, Rheotanytarsus sp.1 and Cladotanytarsus sp. 1.

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Supporting Agencies

Algerian Ministère de l’Enseignement Supérieur et de la Recherche Scientifique (DGRSDT/M.E.S.R.S.) and DSFP, King Saud University, Saudi Arabia.
Bruno Rossaro, University of Milan
Department of Food, Environmental and Nutritional Sciences

How to Cite

Chaib, Nadjla, Zineb Bouhala, Lilia Fouzari, Laura Marziali, Boudjéma Samraoui, and Bruno Rossaro. 2013. “Environmental Factors Affecting the Distribution of Chironomid Larvae of the Seybouse Wadi, North-Eastern Algeria”. Journal of Limnology 72 (2):e16. https://doi.org/10.4081/jlimnol.2013.e16.

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