Morphology, typification and critical analysis of some ecologically important small naviculoid species (Bacillariophyta)

Wetzel, Carlos E.; Éctor, Luc; Vijver, Bart Van de; Compère, Pierre; Mann, David G.

doi:10.5507/fot.2015.020

Cited by 83 publications

(54 citation statements)

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“…Для этого необходимы новые данные по этим таксонам из других местообитаний. Недавно Wetzel et al (2015) перевели более 60 таксонов из родов Navicula, Naviculadicta и Eolimna в род Sellaphora, однако вид N. disjuncta, который имеет сходную морфологию со многими переведенными таксонами, оказался вне поля зрения этих исследователей. Приводим его уточненный диагноз.…”

Section: результаты и и обсуждениеunclassified

“…Согласно литературным данным, многие мелкоразмерные представители рода Navicula s.l. проявляют значительную изменчивость формы створки (Генкал, Харитонов, 2010а, б;Генкал, Ярушина, 2014;Zelana-Wieczorek, 2011;Buczko et al, 2015;Wetzel et al, 2015). Размерные признаки (длина и ширина) в исследованных образцах показали более широкую степень изменчивости по сравнению с диагнозом и другими литературными данными (см.…”

Section: результаты и и обсуждениеunclassified

“…Первые два вида обнаружены на северо-востоке Европейской части России (Лосева и др., 2004; Стенина, 2010), последний -в бассейне Ладожского озера (Генкал, Трифонова, 2009). В род Sellaphora был переведен сначала N. disjuncta (Mann, 1989), затем N. stauroneioides и N. difficillima (Wetzel et al, 2015). Вид Sellaphora stauroneioides недавно обнаружен в водоемах и водотоках Карелии (Генкал и др., 2015), а Sellaphora disjuncta -в оз.…”

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“…Mann comb. nov., and hereafter referred to as S. saugerresii- Wetzel et al 2015). Thus, several studies suggest a strong and robust association between L. hungarica and duckweed, and potentially S. saugerresii also.…”

Section: Introductionmentioning

confidence: 99%

Mission possible: diatoms can be used to infer past duckweed (lemnoid Araceae) dominance in ponds

et al. 2017

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Compared to larger lakes, ponds have rarely been the focus of palaeoecological studies. A common feature of ponds, especially those subject to eutrophication, is mass surface coverings of lemnoid Araceae (duckweed) which have severe implications for ecological processes in small waterbodies, in particular lowered oxygen content. To help understand the implications of duckweed dominance for the longterm ecology of ponds, and to determine the potential for palaeoecological studies in ponds more generally, we develop a new diatom-based Lemna-indicator metric. Recent studies of diatom host-plant relationships have shown significant associations between duckweed and the epiphytes Lemnicola hungarica and Sellaphora saugerresii (formally known as Sellaphora seminulum). To determine the potential of these species as palaeo-indicators of long-term duckweed dynamics in ponds, we investigated the diatom composition of surface sediment assemblages in sets of duckweed and non-duckweed-dominated ponds in Norfolk, eastern England. In addition, we undertook diatom analysis of two cores from a small farmland pond (Bodham Rail Pit) subject to a known duckweed dominance event (1999)(2000)(2001)(2002)(2003)(2004)(2005). Both L. hungarica and S. saugerresii were significant predictors of past Lemna dominance in the surface sediments. Further, in the core study, both diatom species accurately and closely tracked the documented ''on-off'' duckweed cycle. Our study suggests huge potential for using ponds in palaeoecological studies and for diatombased investigations of floating plant histories.

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“…Small naviculoid diatoms frequently dominate in fresh water and when their relative abundance exceeds 5%, their ecological importance is unquestionable (Wetzel et al 2015). However, whereas most of them can hardly be identified at species level using (LM) European ecological status assessments require identification to the highest taxonomical level possible (tHe euroPeaN ParliameNt aNd tHe couNcil oF tHe euroPeaN uNioN 2000) and the commonly used diatom metrics work at species level or below (ector & rimet 2005).…”

Section: Introductionmentioning

confidence: 99%

Biogeography and morphology of a poorly known Sellaphora species

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Buczkó³

et al. 2017

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Specimens of a very small diatom were found in a dead oxbow of Tisza River (Hungary), in Eula River (Germany) and Parroy Pond (France). After SEM studies we identified all of them as Eolimna archibaldii J.c. taylor et laNge-Bert., which is currently regarded as endemic species to South Africa. Furthermore, the results of Principal Components Analysis of morphometric characters clearly demonstrated an overlap between the type material and European populations. Therefore this diatom cannot be considered endemic to South Africa. Moreover, E. archibaldii and a very similar species, E. becaresii are transferred to the genus Sellaphora. Our results confirm the benefit of SEM for verifying the identity of small-sized diatoms, especially for routine monitoring, and allow more precise ecological assessment.

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Morphology, typification and critical analysis of some ecologically important small naviculoid species (Bacillariophyta)

Cited by 83 publications

References 83 publications

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Mission possible: diatoms can be used to infer past duckweed (lemnoid Araceae) dominance in ponds

Biogeography and morphology of a poorly known Sellaphora species

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