Les hydropsychidae (trichoptera) du haut-rhône entre genève et lyon

Bournaud, Michel; Tachet, Henri; Perrin, J. F.

doi:10.1051/limn/1982002

Cited by 30 publications

(15 citation statements)

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“…Other sources illustrating the frontoclypeus of Hydropsyche provided more support for the idea that six contrasting light patches on the frontoclypeus (Fig. 3) is the basic colour pattern that is more or less modified within almost all Mid-European species: 67 drawings and photographs of 16 Mid-European species in Pitsch (1993); 48 photographs of 17 species from Germany in Neu and Tobias (2004); 22 photographs of six species from the upper Rhoˆne in Bournaud et al (1982); 20 photographs of seven species from former Czechoslovakia in Sedla´k (1971); 12 photographs of 11 species from Austria in Waringer and Graf (1997); and six drawings of six species from the Netherlands in Higler (2005). Beyond Mid-Europe, the six-patch colour pattern is typical in many other European areas [for Mid-European species as well as for other species of the genus: see illustrations from the European part of the former USSR (Lepneva, 1970); the British Isles (Edington and Hildrew, 1981); the Iberian Peninsula (Zamora-Munoz et al, 1995); and Sicily and the Italian Peninsula (De Pietro, 1999)].…”

Section: Discussionmentioning

confidence: 99%

Variation of colour patterns in larval Hydropsyche (Trichoptera): Implications for species identifications and the phylogeny of the genus

Statzner¹,

Mondy

2009

Limnologica

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Larvae of the lotic caddisfly genus Hydropsyche may occur in densities of thousands to several tens of thousands of individuals/m 2 across continents and running water types. Therefore, stream ecologists frequently face the task of identifying larvae of this genus. Early keys to larval Hydropsyche of Asia, Europe and North America often used the relatively complicated frontoclypeal colour pattern for species discrimination, whereas equivocal views about the variation of this pattern limited its use in recent keys. Has each species of a given species group a different (although intraspecifically variable) basic pattern of lighter spots on the darker frontoclypeus, or have all species of a group the same basic colour pattern that varies more or less intraspecifically? An answer to this question has obvious implications for the identification of the species as well as for the phylogeny of the genus, so we examined the variation of this colour pattern across 11,000 specimens of 10 Hydropsyche species from the Loire River (France).All 10 species had the same basic colour pattern on the frontoclypeus (six contrasting light patches on a dark background) that varied intraspecifically across a certain range of colour contrasts. Comparing other sources illustrating the frontoclypeus of Hydropsyche larvae provided more support for the idea that six contrasting light patches on the frontoclypeus is the typical basic colour pattern that varies within almost all European species; males of these species have a simple phallus form. Two European and many North American species of the genus (from the Ceratopsyche group) have a different basic colour pattern of seven light patches on the frontoclypeus that varies also intraspecifically; males of these species have a complicated phallus form.If the variation of such colour patterns in co-existing populations of several species is known, the relative contrast differences among the individual patches on the frontoclypeus and the form of the individual patches can provide valuable information for rapid species identification. Analysis of this variation may also contribute to phylogenetic studies of the genus Hydropsyche and other hydropsychids.

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Section: Discussionmentioning

confidence: 99%

Variation of colour patterns in larval Hydropsyche (Trichoptera): Implications for species identifications and the phylogeny of the genus

Statzner¹,

Mondy

2009

Limnologica

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“…Factor one describes a longitudinal gradient, represented in Fig. 3 (Jurine), (Boumaud, Tachet & Perrin, 1982;Perrin & Roux, 1978;Dessaix, 1980;Gaschignard-Fossati, 1986;Gaschignard & Berly, 1987;Creuze des Chatelliers, 1991). Apart from Fabaeformiscandona zvegelini (Petkovski), no hypogean taxa were found in this group.…”

Section: Spatial Distribution Of Interstitial Assemblages In Gravel Bmentioning

confidence: 99%

Patch distribution of interstitial communities: prevailing factors

1992

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1. Conimunity structure of interstitial invertebrates was studied in the sediments of two gravel bars in a bypass section of the Rhone River (France), in relation to hydroiogical patchiness and to major geomorphologicai characteristics of the sampling areas. Hydroiogical patchiness was characterized by upwelling or downwelling zones while geomorphologicai characteristics were concerned mainly with position towards the head or tail of each bar, which presented different environmental conditions. 2. Longitudinal profiles of the two bars, at 0.5 and 1.0 m below the substrate surface, were compared. At each station 10-1 samples were taken using mobile standpipes and a Bou-Rouch pump. During low-water conditions, replicate samples were taken in both the head-bar and tail-bar regions to confirm the results. Physicochemical parameters were used to differentiate surface water from ground water (conductivity, alkalinity, silica, nitrates, sulphates and temperature) and to detect hydroiogical patterns. 3. Two different situations were observed within the gravel bars. In the first one, the upwelling zone was situated in the tail bar and downwelling zone in the head bar. The reverse was observed in gravel bar 2 where the head-bar region formed the upwelling zone and the tail-bar region formed the downwelling zone. 4. In the first situation, the distribution of interstitial assemblages corresponded with the observed hydroiogical patterns: epigean fauna characterized the downwelling zone and stygofauna characterized the upwelling zone. The interstitial fauna seemed to be strictly linked to the mode of water movement within the sediments. Hydrological patchiness therefore appeared to be an important factor for the structure of interstitial assemblages. 5. In the second case there was no relationship between the hydroiogical and the biological pattern. Epigean fauna and hypogean fauna were scattered all along the gravel bar. These results suggest that geomorphology is a second important factor governing the composition and structure of interstitial assemblages. A precise structure was obtained when hydroiogical and geomorphologicai characteristics were superimposed (case 1). When they were opposed (case 2) all the spedes responded according to their individual ecological requirements.

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“…The composition (Bournaud et al 1982, Tachet et al 1992 hou 1993), drift (Cellot & Bournaud 1988, Cellot 1989, fluctuations and changes under human impacts (Bournaud et al 1987a& b, Usseglio-Polatera & Bournaud 1989, Fruget 1991 of the macroinvertebrate assemblages have been studied in the French course of the river, but little is known proportionally about the Swiss upstream reaches.…”

Section: Introductionmentioning

confidence: 99%

A ten years survey of longitudinal zonation and temporal changes of macrobenthic communities in the Rhône River, downstream from lake Geneva (Switzerland)

Dethier

Castella

2002

Ann. Limnol. - Int. J. Lim.

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The macrobenthic fauna of the Rhône River below Lake Geneva was studied between 1983 and 1993 to describe patterns of longitudinal and temporal community changes. Sampling was based upon the use of artificial substrates in 11 stations. The confluence with the Arve (an alpine tributary) is the first source of faunal discontinuity, both in terms of species and feeding group composition. The Verbois hydropower plant is the second longitudinal disruption. From a temporal point of view, the construction of the Seujet hydropower plant was a major source of faunal fluctuation. After this event, and until the end of the study, lenitophilous taxa increased to the detriment of rheophilous taxa. Etude décennale de la zonation et des variations temporelles des communautés macrobenthiques dans le Rhône, à l'aval du lac Léman (Suisse)Mots-clés : macroinvertébrés aquatiques, barrage hydro-électrique, Lac Léman, suivi environnemental, Fleuve Rhône, Suisse.La macrofaune benthique du Rhône, à l'aval du lac Léman (Suisse), a été étudiée de 1983 à 1993 afin de décrire son hétéro-généité longitudinale et ses variations temporelles. La macrofaune a été échantillonnée à l'aide de substrats artificiels dans onze stations. La confluence avec l'affluent alpin l'Arve est la première source de discontinuité faunistique en terme de composition taxonomique et fonctionnelle des communautés. Le barrage hydro-électrique de Verbois en est une seconde. D'un point de vue temporel, la construction du barrage hydro-électrique du Seujet a été une source majeure de variation faunistique. A la suite de cette construction et, jusqu'en 1993, on a observé une augmentation des taxons lénitophiles, au détriment des communautés plus rhéophiles.

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Les hydropsychidae (trichoptera) du haut-rhône entre genève et lyon

Cited by 30 publications

References 0 publications

Variation of colour patterns in larval Hydropsyche (Trichoptera): Implications for species identifications and the phylogeny of the genus

Variation of colour patterns in larval Hydropsyche (Trichoptera): Implications for species identifications and the phylogeny of the genus

Patch distribution of interstitial communities: prevailing factors

A ten years survey of longitudinal zonation and temporal changes of macrobenthic communities in the Rhône River, downstream from lake Geneva (Switzerland)

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