<i>Didymosphenia geminata</i>(Lyngbye) M. Schmidt (Bacillariophyta) in the Danube basin: New data from the Drava river (northern Italy)

Beltrami, Maria Elena; Cappelletti, Cristina; Ciutti, F.

doi:10.1080/11263500701872788

Cited by 16 publications

(18 citation statements)

References 3 publications

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“…Phases of hydrological stability also promote the accumulation of high levels of periphyton biomass in rivers (Biggs 1996). Similarly, long periods of low flows favour D. geminata growth (Antoine and Benson-Evans 1986;Whitton and Crisp 1984) and massive mat formations of D. geminata are often found in dammed or lake-fed rivers with regulated flow (Beltrami et al 2008;Kawecka and Sanecki 2003;Kilroy et al 2008;Koksvik and Reinertsen 2008). Once D. geminata has become established, further dispersal and immigration into areas further downstream will depend on the number of propagules produced.…”

Section: Implications For Invasion Dispersal and Managementmentioning

confidence: 97%

“…Newer publications, however, suggest that D. geminata occurs in a wider range of environmental conditions (e.g. Kawecka and Sanecki 2003;Cardinale et al 2006;Bhatt et al 2008;Beltrami et al 2008). In New Zealand D. geminata was first recorded in 2004 in the lower Waiau River (Kilroy 2004;Kilroy et al 2006Kilroy et al , 2008.…”

Section: Introductionmentioning

confidence: 92%

“…by boating, kayaking, fishing (Kilroy et al 2008), and fish introduction (Bhatt et al 2008). Massive growth of this large, stalk forming species alters the composition of macroinvertebrate communities (Kilroy et al 2009), which may affect fish stocks in affected rivers (Beltrami et al 2008). The importance of human activity for global dispersal and re-distribution of D. geminata (Kirkwood et al 2007; see also : Smayda 2007) and the implications of its mass development for food web structure and the economy (Campbell 2008) are attributes that can be compared to marine bloom-forming non-indigenous species.…”

Section: Introductionmentioning

confidence: 99%

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Didymosphenia geminata (Protista, Bacillariophyceae) invasion, resistance of native periphyton communities, and implications for dispersal and management

Flöder

Kilroy

2009

Biodivers Conserv

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Historically described as cosmopolitan but rare, the benthic diatom Didymosphenia geminata is now considered a nuisance, bloom-forming and invasive species. In New Zealand, D. geminata was first recorded in 2004 in the lower Waiau River. By winter 2008 it had been identified in 26 major catchments. To investigate invasion success of D. geminata in relation to succession and biomass accumulation of native periphyton communities, we conducted a two-factorial field experiment. Seven successional stages of a native periphyton community (substrate exposure time: 0-49 days) were exposed to two D. geminata propagule concentrations (low and high) for 25 days. D. geminata propagule concentration and successional stage of the native periphyton community significantly affected the invasion success of D. geminata. While D. geminata invasion was low on all substrates that had been exposed to the low D. geminata propagule concentration, there was a unimodal relationship between invasion success and substrate exposure time at the high propagule concentration. D. geminata abundance was low on uncolonised substrates, increased when the native communities were 1-or 2-week-old, and low when the age of the native communities was 4 or more weeks. These results imply that D. geminata is a late successional species that needs some existing structure to anchor to a substrate. Although late successional stages of the native periphyton community displayed partial resistance to D. geminata invasion, trying to keep D. geminata abundances as low as possible appears to be the only way to manage this species at this time. Abbreviations DRPDissolved reactive phosphorus DIN Dissolved inorganic nitrogen DRSi Dissolved reactive silicate

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Section: Implications For Invasion Dispersal and Managementmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Didymosphenia geminata (Protista, Bacillariophyceae) invasion, resistance of native periphyton communities, and implications for dispersal and management

Flöder

Kilroy

2009

Biodivers Conserv

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“…Recently, however, D. geminata abundance has increased dramatically and expanded to warmer waters of western states in the United States, Canada, India, Italy, and New Zealand, occupying diverse substrates and posing a threat to other aquatic organisms due to the formation of copious stalk material (Spaulding & Elwell, 2007;Beltrami et al, 2008;Bhatt et al, 2008). In North America, nuisance blooms of the diatom were first reported over a decade ago (Sherbot & Bothwell, 1993).…”

Section: Introductionmentioning

confidence: 99%

Factors controlling streambed coverage of Didymosphenia geminata in two regulated streams in the Colorado Front Range

et al. 2009

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Didymosphenia geminata is a stalk-forming freshwater diatom which was historically found primarily in oligotrophic lakes and streams, but has recently become a nuisance species in many lotic systems worldwide. In the last 5-8 years, D. geminata has become established in Boulder Creek and South Boulder Creek, two regulated montane streams in the Front Range of the Colorado Rocky Mountains. Factors that may influence the growth of D. geminata were monitored during the summer of 2006. D. geminata abundance decreased in Boulder Creek after an unusual flood event caused by 3 days of sustained rainfall in the headwaters of the watershed. However, within a week, coverage had been restored to preflood levels. Variations in D. geminata abundance among sites were found to be negatively correlated with total dissolved phosphorus concentrations and bed movement, as measured by Shields stress. In contrast, D. geminata abundance was not significantly correlated with temperature, conductivity, pH, total suspended solids, or dissolved inorganic nitrogen. Our results suggest that bed movement may be a dominant scouring mechanism that acts to control the growth and distribution of D. geminata. The potential role of total dissolved phosphorus and bed movement in decreasing D. geminata coverage adds to the limited base of knowledge regarding controls on the growth and distribution of this species, and could be investigated by researchers studying D. geminata blooms in other stream ecosystems.

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“…Se ha sugerido que altos niveles de radiación ultravioleta pueden estimular su cre- BERG & LILLEHAMMER, 1984;JONSSON et al, 2000;KAWECKA & SANECKI 2003;URS 2006;BELTRAMI et al, 2007). Los principales efectos perjudiciales asociados a esta alga se deben a su capacidad de sintetizar grandes cantidades de polisacáridos extracelulares que conforman gran parte de la masa de las colonias que se forman en los cauces fluviales.…”

Section: I D Y M O S P H E N I a G E M I N A T A ( B A C I L L A R unclassified

Didymosphenia geminata (Bacillariophyta, Gomphonemataceae), una amenaza para nuestros ríos

Blanco¹,

Éctor²

2008

cdbio

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Didymosphenia geminata(Lyngbye) M. Schmidt (Bacillariophyta) in the Danube basin: New data from the Drava river (northern Italy)

Cited by 16 publications

References 3 publications

Didymosphenia geminata (Protista, Bacillariophyceae) invasion, resistance of native periphyton communities, and implications for dispersal and management

Didymosphenia geminata (Protista, Bacillariophyceae) invasion, resistance of native periphyton communities, and implications for dispersal and management

Factors controlling streambed coverage of Didymosphenia geminata in two regulated streams in the Colorado Front Range

Didymosphenia geminata (Bacillariophyta, Gomphonemataceae), una amenaza para nuestros ríos

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