MORPHOLOGISCHE UND ÖKOLOGISCHE CHARAKTERISIERUNG VON SIPPEN UM DEN<i>FRAGILARIA CAPUCINA</i>-KOMPLEX SENSU LANGE-BERTALOT 1980

Hurlimann, J. H.; Straub, François

doi:10.1080/0269249x.1991.9705145

Cited by 21 publications

(4 citation statements)

References 7 publications

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“…Taxa should only be used for the purpose of bioindication if they are morphologically and ecologically distinct. For example, Hürlimann & Straub (1991) described ammonium‐sensitive morphs of the Fragilaria capucina complex and sensu Lange‐Bertalot (1980) and Theriot & Stoermer (1984) described a relationship between nutrients and areola density in S. niagarae . We used a morphometric approach to define morphs and evaluated the ecological significance of this classification by their distribution in 68 lakes in Switzerland.…”

Section: Methodsmentioning

confidence: 99%

Morphological variation within the diatom taxon Cyclotella comensis and its importance for quantitative temperature reconstructions

Hausmann

Lotter

2001

Freshwater Biology

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1. The morphologically complex taxon Cyclotella comensis Grunow had no clear relationship with environmental parameters in a study using sediment surface samples from the Swiss Alps. The morphological heterogeneity of the taxon was investigated by applying a principal component analysis (PCA) to 9000 presence/absence descriptions of valves from surface samples of six lakes from different altitudes (15 characteristics, 100 valves each lake). The PCA allowed the classification of six morphs, which differed mainly in size and length of striae. Photographs of the morphs are shown in this paper. 2. Sixty‐eight sediment surface samples were analysed using these newly defined six morphs. Summer temperature explained a major part of the variance between the morphs as assessed by a redundancy analysis (RDA). Summer temperature optima and tolerances were estimated using weighted averaging. 3. The influence of the revised C. comensis taxonomy on the diatom inferred summer temperature of a high alpine lake is discussed in a multiproxy context for the past 800 years.

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Section: Methodsmentioning

confidence: 99%

Morphological variation within the diatom taxon Cyclotella comensis and its importance for quantitative temperature reconstructions

Hausmann

Lotter

2001

Freshwater Biology

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“…Thus, the recognition of taxa with restricted ecological ranges can improve the predictive power of diatoms in water quality monitoring (Koppen, 1975;Hürlimann & Straub, 1991;Potapova & Hamilton, 2007). Similarly, lumping together C. schumanniana, C. lewisii, and C. limosa could cause loss of ecological information and decrease the precision level of water quality monitoring.…”

Section: Discussionmentioning

confidence: 98%

Morphological variation of the Caloneis schumanniana species complex (Bacillariophyceae) from different environmental conditions in North American streams

2009

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Morphological variations of the Caloneis schumanniana (Grunow) Cleve species complex were studied using multivariate analysis. Populations of three species, synonymized in the literature, i.e., C. schumanniana, Caloneis limosa (Kützing) Patrick and Caloneis lewisii Patrick, were analyzed. Their morphological and ecological characteristics were evaluated and outlined for the sampled streams by US EPA's Western Environmental Monitoring and Assessment Program. Geographic separation among the three taxa was not resolved. This study showed that C. schumanniana has wider ecological tolerance than C. limosa and C. lewisii. Despite the ecological overlap, specific ecological preferences of C. limosa and C. lewisii were described.

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“…al. (1978, Schoeman & Archibald (1978, 1979, Germain (1981), Krammer & Lange-Bertalot (1986), Jahn (1986), Williams & Round (1987), Cox (1987), Round et al (1990), Krammer & Lange-Bertalot (1991a;1991b), Hürlimann & Straub (1991) e Hartley (1996).…”

Section: Methodsmentioning

confidence: 99%

Diatomáceas perifíticas dos arroios Sampaio e Sampainho, Rio Grande do Sul, Brasil

Oliveira¹,

Torgan

Rodrigues

2002

Acta Bot. Bras.

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Estudo taxonômico de diatomáceas perifíticas em substrato artificial (fio de poliamida) foi realizado nos arroios Sampaio e Sampainho, localizados na Depressão Central do Estado do Rio Grande do Sul. A investigação baseou-se em amostragens mensais, realizadas no período de um ano (julho de 1994 a junho de 1995). Foram identificados, descritos e ilustrados vinte e um táxons infragenéricos, distribuídos em treze gêneros e onze famílias. Achnanthes rupestoides Hohn, Diadesmis brekkaensis (Petersen) D. G. Mann, Navicula tenelloides Hustedt e Placoneis elginensis (Gregory) E. J. Cox são registrados pela primeira vez em ambientes lóticos no Estado.

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MORPHOLOGISCHE UND ÖKOLOGISCHE CHARAKTERISIERUNG VON SIPPEN UM DENFRAGILARIA CAPUCINA-KOMPLEX SENSU LANGE-BERTALOT 1980

Cited by 21 publications

References 7 publications

Morphological variation within the diatom taxon Cyclotella comensis and its importance for quantitative temperature reconstructions

Morphological variation within the diatom taxon Cyclotella comensis and its importance for quantitative temperature reconstructions

Morphological variation of the Caloneis schumanniana species complex (Bacillariophyceae) from different environmental conditions in North American streams

Diatomáceas perifíticas dos arroios Sampaio e Sampainho, Rio Grande do Sul, Brasil

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