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

  • Nadjla Chaib | nadjla21@yahoo.fr Univerité du 20 Août 1955, Skikda, Algeria, Algeria.
  • Zineb Bouhala Laboratoire de Recherche et de Conservation des Zones Humides, Algeria.
  • Lilia Fouzari Laboratoire de Recherche et de Conservation des Zones Humides, Algeria.
  • Laura Marziali CNR-IRSA Water Research Institute, Italy.
  • Boudjéma Samraoui Laboratoire de Recherche et de Conservation des Zones Humides, Algeria.
  • Bruno Rossaro University of Milan, Italy.

Abstract

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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Author Biography

Bruno Rossaro, University of Milan
Department of Food, Environmental and Nutritional Sciences
Published
2013-03-27
Section
Original Articles
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.
Keywords:
chironomids, environmental factors, Seybouse river, North Africa, IndVal, co-inertia analysis (CoIA)
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How to Cite
1.
Chaib N, Bouhala Z, Fouzari L, Marziali L, Samraoui B, Rossaro B. Environmental factors affecting the distribution of Chironomid larvae of the Seybouse wadi, North-Eastern Algeria. jlimnol [Internet]. 27Mar.2013 [cited 27Feb.2020];72(2):e16. Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2013.e16

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