Changes in the macrobenthic community structure following the introduction of the invasive algae Didymosphenia geminata in the Matapedia River (Québec, Canada)

Gillis, Carole‐Anne; Chalifour, Mireille

doi:10.1007/s10750-009-9832-7

Cited by 76 publications

(64 citation statements)

References 7 publications

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“…Recent research has focused primarily on the biology and distribution of D. geminata (Kawecka and Sanecki 2003, Kilroy et al 2005, Kilroy et al 2006, Kirkwood et al 2007, Spaulding and Elwell 2007, Whitton et al 2009). Other recent research on invertebrate communities has shown that invertebrate composition tends to shift from larger taxa (i.e., Ephemeroptera, Plecoptera, Trichoptera) to smaller taxa such as Diptera in areas impacted by D. geminata (Shelby 2006, Shearer et al 2007, Larson and Carreiro 2008, Gillis and Chalifour 2009, Kilroy et al 2009). Moreover, total invertebrate abundance tends to increase in areas where D. geminata is present (Gillis andChalifour 2009, Kilroy et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Invertebrate Composition and Abundance Associated withDidymosphenia geminatain a Montane Stream

James¹,

Ranney²,

Chipps³

et al. 2010

Journal of Freshwater Ecology

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Didymosphenia geminata, a relatively new aquatic nuisance species that can form extensive, mucilaginous mats on stream substrates, was reported from Rapid Creek, South Dakota in 2002. To examine the association between D. geminata and the invertebrate community in Rapid Creek, macroinvertebrates were quantified using three gear types in the fall of 2006. D. geminata was present at two of four sites sampled (range = 5.53 to 809.68 g m-2 dry mass). At each site, invertebrates were collected using dip nets, Surber samplers, and drift nets. The combined percentage of Ephemeroptera, Plecoptera, and Trichoptera in areas with D. geminata was lower (41%) than in areas without D. geminata (76%). Diptera abundance was higher at sites with D, geminata than in sites where D. geminata was absent. INTRODUCTIONThe spread and establishment of Didymosphenia geminata has prompted much

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Section: Introductionmentioning

confidence: 99%

Invertebrate Composition and Abundance Associated withDidymosphenia geminatain a Montane Stream

James¹,

Ranney²,

Chipps³

et al. 2010

Journal of Freshwater Ecology

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“…We know, however, much less about invasion by nonpathogenic microbes, even though we have evidence that they do occur in nature. For example, in the last two decades, a number of invasions by aquatic microbial species have been documented (8)(9)(10)(11). Although there are some studies on the ecological impacts of these invasions (8), we still know little about their potential consequences.…”

mentioning

confidence: 99%

Dynamics of an experimental microbial invasion

Acosta

Zamor

Najar

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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The ecological dynamics underlying species invasions have been a major focus of research in macroorganisms for the last five decades. However, we still know little about the processes behind invasion by unicellular organisms. To expand our knowledge of microbial invasions, we studied the roles of propagule pressure, nutrient supply, and biotic resistance in the invasion success of a freshwater invasive alga, Prymnesium parvum, using microcosms containing natural freshwater microbial assemblages. Microcosms were subjected to a factorial design with two levels of nutrient-induced diversity and three levels of propagule pressure, and incubated for 7 d, during which P. parvum densities and microbial community composition were tracked. Successful invasion occurred in microcosms receiving high propagule pressure whereas nutrients or community diversity played no role in invasion success. Invaded communities experienced distinctive changes in composition compared with communities where the invasion was unsuccessful. Successfully invaded microbial communities had an increased abundance of fungi and ciliates, and decreased abundances of diatoms and cercozoans. Many of these changes mirrored the microbial community changes detected during a natural P. parvum bloom in the source system. This role of propagule pressure is particularly relevant for P. parvum in the reservoirdominated southern United States because this species can form large, sustained blooms that can generate intense propagule pressures for downstream sites. Human impact and global climate change are currently causing widespread environmental changes in most southern US freshwater systems that may facilitate P. parvum establishment and, when coupled with strong propagule pressure, could put many more systems at risk for invasion. microbial ecology | diversity | invasion resistance | propagule pressure | Prymnesium

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“…The "control" site (LH) is a headwater lake to the Humqui River in Gaspésie, Quebec, with one outflowing river (Humqui River that flows into the Matapedia River) where didymo blooms have been observed since 2006 1 . The "impact" site (LAS) is a lake located ~30 km east of LH.…”

Section: Study Lakes Sediment Retrieval and Chronologymentioning

confidence: 99%

“…It can form extensive mats several centimeters thick (referred to as blooms) on the bottoms of unshaded stretches of rivers or streams with stable flow patterns and often low nutrient concentrations 3,4,5 . Blooms can alter the river bottom, with implications for many organisms 1,6,7 .Many government agencies currently recognize didymo as an introduced species with the ability to affect the structure and function of river ecosystems 8 . In North America, this has resulted in bans on felt-soled waders used by anglers, public awareness campaigns, and equipment-cleaning protocols to limit the spread of didymo.…”

Section: Introductionmentioning

confidence: 99%

Rock snot and lake mud: exploring the history of recent blooms of Didymosphenia geminata using information contained in lake sediments

Lavery

Kurek

Rühland

et al. 2014

Canadian Young Scientist Journal

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Ecosystem managers have often considered the nuisance diatom species, Didymosphenia geminata (didymo) as being introduced to the natural environment through human activities; however, observations from early 20th-century surveys challenge this characterization. We use diatoms preserved in lake sediment cores to investigate the history of didymo blooms from Gaspésie, Quebec. Relative abundances of diatoms were examined from the dated sediments of Lac Humqui and Lac au Saumon (a lake with an inflowing river currently supporting blooms). Didymo was observed throughout the Lac au Saumon core, demonstrating that it has been present in the region well before the first reports of blooms in 2006. Lac Humqui diatom assemblages experienced a shift in composition with declines in benthic taxa (attached to substrates) and increases in planktonic (free floating) diatoms that began ~1970. Strong relationships between this diatom shift, and increases in regional air temperatures and earlier river ice-out dates were consistent with the expected effects of climate warming on aquatic systems. Our paleolimnological evidence shows that climate warming, rather than human introduction, likely plays an important role in triggering didymo blooms.

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Changes in the macrobenthic community structure following the introduction of the invasive algae Didymosphenia geminata in the Matapedia River (Québec, Canada)

Cited by 76 publications

References 7 publications

Invertebrate Composition and Abundance Associated withDidymosphenia geminatain a Montane Stream

Invertebrate Composition and Abundance Associated withDidymosphenia geminatain a Montane Stream

Dynamics of an experimental microbial invasion

Rock snot and lake mud: exploring the history of recent blooms of Didymosphenia geminata using information contained in lake sediments

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