| Title | Environmental factors affecting the distribution of Chironomid larvae of the Seybouse wadi, Northeastern Algeria |
| 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. |
| Source | Journal of limnology (Online) 72 (2), pp. 203–214 |
| Keywords | chironomidsenvironmental factorsSeybouse riverNorth AfricaIndValco-inertia analysis (CoIA) |
| Journal | Journal of limnology (Online) |
| Editor | Istituto per lo Studio degli Ecosistemi, Pavia, Italia |
| Year | 2013 |
| Type | Articolo in rivista |
| DOI | 10.4081/jlimnol.2013.e16 |
| Authors | 1-2)Chaib N., 2)Bouhala Z., 2)Fouzari L., 3)Marziali L., 2-4)Samraoui B., 5)Rossaro B |
| Text | 272254 2013 10.4081/jlimnol.2013.e16 chironomids environmental factors Seybouse river North Africa IndVal co inertia analysis CoIA Environmental factors affecting the distribution of Chironomid larvae of the Seybouse wadi, Northeastern Algeria 1 2 Chaib N., 2 Bouhala Z., 2 Fouzari L., 3 Marziali L., 2 4 Samraoui B., 5 Rossaro B 1 Departement de Genie des Procedes, Faculte de Technologie, Universite du 20 Aout 1955, Skikda, Algeria; 2 Laboratoire de Recherche et de Conservation des Zones Humides, Universite du 8 Mai 1945, Guelma, Algeria; 3 CNR IRSA Water Research Institute, U.O.S. Brugherio, 20861 Brugherio MB , Italy; 4 Center of Excellence for Research in Biodiversity, King Saud University, Riyadh, Saudi Arabia; 5 Department of Food, Environmental and Nutritional Sciences DeFENS , Universita di Milano, Italy. Corresponding author nadjla21@yahoo.fr 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. 72 Articolo in rivista Istituto per lo Studio degli Ecosistemi 1723 8633 Journal of limnology Online Journal of limnology Online J. limnol. Online Journal of limnology. Online laura.marziali MARZIALI LAURA TA.P04.032.003 La risposta delle comunita acquatiche bioindicatori e WFD |
