Minireview—the First Kiss: Establishment and Control of Initial Adhesion by Raphid Diatoms

Wetherbee, Richard; Lind, Jan; Burke, Jo; Quatrano, Ralph S.

doi:10.1046/j.1529-8817.1998.340009.x

Cited by 223 publications

(166 citation statements)

References 18 publications

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“…Decho 1990;Hoagland et al 1993;Costerton et al 1995;Gosselin et al 1997) in the aquatic environment. The EPS are composed of several mucoid substances which aid, e.g., in cell locomotion (Wetherbee et al 1998) and adhesion to surfaces (Cooksey and WigglesworthCooksey 1995). In addition to direct biological functions EPS enhance the agglutination of planktonic organic and inorganic particles (Hamm 1994).…”

Section: Introductionmentioning

confidence: 99%

Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic)

Krembs

Engel²

2001

Marine Biology

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The distribution and abundance of transparent exopolymer particles (TEP) was determined in and below pack ice of the Laptev Sea from July to September 1995. Samples were collected from the lowermost 10 cm of icē oes and at 10 cm below the ice±water interface. Abundance of bacteria, protists and TEP was determined, and the sea ice±water boundary layer was characterized using temperature, salinity and molecular viscous shear stress. TEP, with a distinct size distribution signal, were found in highest concentrations inside the sea ice, ranging from not detectable to 16 cm 2 l )1 (median: 2.9 cm 2 l )1 ). In the water, concentrations were one order of magnitude lower, ranged from below detection to 2.7 cm 2 l )1 (median: 0.2 cm 2 l )1 ) and decreased after the middle of August, whereas abundances of autotrophic¯agellates (AF), diatoms, heterotrophic¯agellates (HF) and ciliates increased. The abundance of TEP decreased with its size in all samples following a power law relationship. The relation of TEP to the microbial community diered between the sea ice and water, being positively correlated with bacteria and diatoms in the ice and negatively correlated with HF in the sea water. The presence of a pycnocline signi®cantly in¯uenced the abundance of organisms, diatom composition and TEP concentrations. Pennate diatoms dominated by Nitzschia frigida were most abundant inside the ice. Though bacteria have the potential to produce exopolymeric substances (EPS), the results of this study indicate that the majority of TEP at the ice±water interface in ®rst-year Arctic summer pack ice are produced by diatoms.

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Section: Introductionmentioning

confidence: 99%

Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic)

Krembs

Engel²

2001

Marine Biology

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“…Once individual diatoms reach a surface, adhesion, movement, and release are active processes (Cooksey and Wigglesworth-Cooksey 1995;Wetherbee et al 1998) that could allow substrate selection. Studies using marine diatoms have demonstrated responses to physical and chemical cues (Wigglesworth-Cooksey and Cooksey 1992;Falciatore et al 2000;Thompson et al 2008) and such cues may be involved in diatom colonization.…”

Section: Discussionmentioning

confidence: 99%

Substrate characteristics affect colonization by the bloom-forming diatom Didymosphenia geminata

2009

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The long-stalked Didymosphenia is capable of forming large blooms and is expanding its range. To better understand the colonization dynamics of this species, we investigated the role of substrate characteristics-rock roughness and biofilm condition-on Didymosphenia colonization in a montane Colorado stream. Rocks differing in roughness (shale and sandstone) were treated to manipulate the diatomdominated biofilm by scrubbing or submersion in 30% hydrogen peroxide. Initial chlorophyll concentration differed among rock types (sandstone [ shale) and biofilm treatments (untreated [ scrubbed [ hydrogen peroxide-treated). Rocks were placed in a Didymosphenia bloom area for 8 days. More Didymosphenia colonized the rougher sandstone than the smoother shale, and more colonized stones with intact biofilms than stones with reduced biofilms (intact [ scrubbed [ hydrogen peroxide). These results suggest that rougher stones may be targeted for surveillance for new populations and that the colonization of intact biofilms is consistent with Didymosphenia's habitat in regulated rivers, where biofilm-scouring spates may be suppressed.

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“…As espécies encontradas sobre o molusco possuem rafe, pela qual eliminam ao exterior mucilagem, que é composta predominantemente por polissacarídeos (Wetherbee & Burke 1998). Esse biocomponente possibilita a aderência das diatomáceas ao substrato e esta fixação pode se dar de várias formas: pela adsorção de toda a face valvar com rafe (forma adnata), caso do gênero Cocconeis; pela formação de pedúnculos, caso de Gomphonema e Encyonema; ou pela formação de uma matriz produzida pelos primeiros colonizadores, que adere os organismos da sucessão, caso dos demais gêneros (Barber & Haworth 1994 …”

Section: Discussionunclassified

Diatomáceas sobre Limnoperna fortunei (Dunker), molusco introduzido no Lago Guaíba, Sul do Brasil

Torgan¹,

Salomoni²,

Bicca³

2009

Rev. bras. Bot.

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-(Diatoms on Limnoperna fortunei (Dunker), an introduced mollusk in Guaíba Lake, southern Brazil). The taxonomic composition of diatoms present on the mollusk Limnoperna fortunei (golden mussel), introduced into Guaíba Lake through ballast water, from ships coming from Argentina, was analyzed with the intention of identifying and evaluating the occurrence of the species in relation to habitat and origin. Mollusks were obtained from a floating wooden platform and on floats situated in the northern region of Guaíba Lake, during the period of August to November 2005. The diatoms were scraped from the shells, analysed under microscope and were oxidized for identification. Results have shown that the molluskan shell may be a favorable habitat for diatom, considering the species richness. Diatom association did not demonstrate to be restricted this habitat, since the most frequent species: Cocconeis fluviatilis Wall., C. placentula Ehr. var. lineata (Ehr.) Heurck, Encyonema silesiacum (Bleisch) Mann, Eunotia pseudosudetica Metz., Lange-Bert. & Garcia-Rodr., Gomphonema parvulum (Kütz.) Kütz., Hydrosera whampoensis (Schw.) Deby, Luticola goeppertiana (Bleisch) Mann, Melosira varians Ag., Navicula symmetrica Patr., Nitzschia palea (Kütz.) Smith, Pinnularia acrosphaeria Smith, Planothidium frequentissimum (Lange-Bert.) Round & Bukh., Pleurosira laevis (Her.) Comp. and Ulnaria ulna (Nitzsch) Comp. were found on rocky substrata and in the plankton of the Guaíba Lake hydrographic basin. Therefore, Eunotia pseudosudetica, Luticola dapalis (Freng.) Mann and Gomphonema mexicanum Grun. are taxa only reported, until now, for the Rio de la Plata, Argentina and their occurrences in Guaíba Lake support the hypothesis of a recent introduction of these species through ballast water as L. fortunei. Key-words -diatoms epizoic, introduced species, taxonomyRESUMO -(Diatomáceas sobre Limnoperna fortunei (Dunker), molusco introduzido no Lago Guaíba, Sul do Brasil). A composição taxonômica de diatomáceas presentes sobre o molusco Limnoperna fortunei (mexilhão dourado), introduzido no Lago Guaíba através da água de lastro de navios oriundos da Argentina, foi analisada com o objetivo de identificar e avaliar a ocorrência das espécies quanto ao habitat e origem. Os moluscos foram retirados de plataforma flutuante de madeira e de bóias situadas na região norte do Lago Guaíba, no período de agosto a novembro de 2005. As diatomáceas presentes sobre as conchas dos moluscos foram raspadas, analisadas sob microscópio e posteriormente oxidadas para identificação. Os resultados demonstraram que a concha do molusco pode ser considerada um habitat favorável às diatomáceas, tendo em vista a riqueza de espécies. A associação de diatomáceas não demonstrou estar restrita a este habitat, pois as espécies mais frequentes Cocconeis fluviatilis Wall., C. placentula Ehr. var. lineata (Ehr.) Heurck, Encyonema silesiacum (Bleisch) Mann, Eunotia pseudosudetica Metz., Lange-Bert. & Garcia-Rodr., Gomphonema parvulum (Kütz.) Kütz., Hydrosera whampoensis (Schw....

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Minireview—the First Kiss: Establishment and Control of Initial Adhesion by Raphid Diatoms

Abstract: Minireviews do not have abstracts.

Cited by 223 publications

References 18 publications

Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic)

Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic)

Substrate characteristics affect colonization by the bloom-forming diatom Didymosphenia geminata

Diatomáceas sobre Limnoperna fortunei (Dunker), molusco introduzido no Lago Guaíba, Sul do Brasil

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