The effect of fungal parasitism on the succession of diatoms in Lake Maarsseveen I (The Netherlands)

Donk, E. Van; Ringelberg, J.

doi:10.1111/j.1365-2427.1983.tb00674.x

Cited by 127 publications

(61 citation statements)

References 17 publications

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“…Many phytoplankton species are sensitive to chytrid parasites and the related ecological implications are important (Canter and Lund, 1948; Niquil et al, 2011; Sime-Ngando, 2012). Chytrid infections have been linked to mass mortalities of host organisms, to suppression or postponement of phytoplankton blooms, and have selective effects on host species composition and successions (Van Donk and Ringelberg, 1983; Bruning et al, 1992; Kagami et al, 2007; Rasconi et al, 2009). Unstable ecosystems seem to favor the opportunistic behavior of parasites (Rasconi et al, 2012), where their activity represents an important but as yet overlooked ecological driving force in food web dynamics.…”

Section: Introductionmentioning

confidence: 99%

Parasitic chytrids sustain zooplankton growth during inedible algal bloom

Rasconi¹,

Grami²,

Niquil³

et al. 2014

Front. Microbiol.

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This study assesses the quantitative impact of parasitic chytrids on the planktonic food web of two contrasting freshwater lakes during different algal bloom situations. Carbon-based food web models were used to investigate the effects of chytrids during the spring diatom bloom in Lake Pavin (oligo-mesotrophic) and the autumn cyanobacteria bloom in Lake Aydat (eutrophic). Linear inverse modeling was employed to estimate undetermined flows in both lakes. The Monte Carlo Markov chain linear inverse modeling procedure provided estimates of the ranges of model-derived fluxes. Model results confirm recent theories on the impact of parasites on food web function through grazers and recyclers. During blooms of “inedible” algae (unexploited by planktonic herbivores), the epidemic growth of chytrids channeled 19–20% of the primary production in both lakes through the production of grazer exploitable zoospores. The parasitic throughput represented 50% and 57% of the zooplankton diet, respectively, in the oligo-mesotrophic and in the eutrophic lakes. Parasites also affected ecological network properties such as longer carbon path lengths and loop strength, and contributed to increase the stability of the aquatic food web, notably in the oligo-mesotrophic Lake Pavin.

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Section: Introductionmentioning

confidence: 99%

Parasitic chytrids sustain zooplankton growth during inedible algal bloom

Rasconi¹,

Grami²,

Niquil³

et al. 2014

Front. Microbiol.

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“…Most studies in freshwaters have focussed on marshlands (reviewed in Kuehn 2008) and examined the open water, leaf litter or emergent macrophytes (e.g., Typha, Phragmites). Studies in lakes have often concentrated on seasonal patterns in the water column (e.g., van Donk and Ringelberg 1983;Holfeld 1998;Lefèvre et al 2012;Rasconi et al 2012) or have compared different lakes (e.g. Zhao et al 2011;Lefèvre et al 2012;Taib et al 2013).…”

Section: Introductionmentioning

confidence: 99%

High habitat-specificity in fungal communities in oligo-mesotrophic, temperate Lake Stechlin (North-East Germany)

Wurzbacher¹,

Warthmann²,

Bourne³

et al. 2016

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Freshwater fungi are a poorly studied ecological group that includes a high taxonomic diversity. Most studies on aquatic fungal diversity have focused on single habitats, thus the linkage between habitat heterogeneity and fungal diversity remains largely unexplored. We took 216 samples from 54 locations representing eight different habitats in the meso-oligotrophic, temperate Lake Stechlin in North-East Germany. These included the pelagic and littoral water column, sediments, and biotic substrates. We performed high throughput sequencing using the Roche 454 platform, employing a universal eukaryotic marker region within the large ribosomal subunit (LSU) to compare fungal diversity, community structure, and species turnover among habitats. Our analysis recovered 1027 fungal OTUs (97% sequence similarity). Richness estimates were highest in the sediment, biofilms, and benthic samples (189-231 OTUs), intermediate in water samples (42-85 OTUs), and lowest in plankton samples (8 OTUs). NMDS grouped the eight studied habitats into six clusters, indicating that community composition was strongly influenced RESEARCH ARTICLEChristian Wurzbacher et al. / MycoKeys 16: 17-44 (2016) 18 by turnover among habitats. Fungal communities exhibited changes at the phylum and order levels along three different substrate categories from littoral to pelagic habitats. The large majority of OTUs (> 75%) could not be classified below the order level due to the lack of aquatic fungal entries in public sequence databases. Our study provides a first estimate of lake-wide fungal diversity and highlights the important contribution of habitat heterogeneity to overall diversity and community composition. Habitat diversity should be considered in any sampling strategy aiming to assess the fungal diversity of a water body.

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“…In this regard, the hypothesis of S. rotula population control by parasites is highly feasible. Desmids infestation by fungi and its seasonal fluctuation may be explained by the very same environment factors that favour development of the alga, such as: temperature increase (> 25 °C), light and nutrients availability increase and structural modifications in the Z mix Simultaneous occurrence of environmental optima for parasites and hosts was registered by Van Donk and Ringelberg (1983) in population of diatoms, but never of desmids.…”

Section: Mucilaginous Sheath and Fungi Infestationmentioning

confidence: 99%

Morphological variation in Staurastrum rotula (Zygnemaphyceae, Desmidiales) in the deepest natural Brazilian lake: essence or accident?

et al. 2014

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For many decades, polymorphism and its consequences have only been studied from the taxonomic point of view. Presently, interest has switched to the environmental causes of morphological variation and its consequences in the form and essence of the species. This study aimed at evaluating desmids morphological modifications of Staurastrum rotula Nordstedt during inter-annual succession patterns in two warm monomitic tropical lakes: Dom 42°33'45"W) and Carioca (19°45'20"S, 42°37'12"W). The effect of thermal stability and light and nutrients availability was based on samples collected monthly from January 2002 to December 2006 compared the morphological modifications. Results indicated that morphological variation, asexual reproduction, theratological forms, mucilaginous envelope and fungal infection were highest in Lake Dom Helvécio and coincided with the biomass increase of species with complex morphology between September and March (stratification period). The Zmix oscillation, wind and rainfall occurring at the end of the mixing period and beginning of the stratification were suggested as autochthonous and allochthonous disturbance agents, respectively, identified as inducers of asexual reproduction and consequently of the morphological variation. It was suggested that incidence of parasitism may act as a potential controlling agent for the Staurastrum rotula population size. It was concluded that morphological variation represents accidents in the original form, i.e. in the desmid species essence, promoting the existence of ecoforms, not of new infraspecific taxa. Keywords

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The effect of fungal parasitism on the succession of diatoms in Lake Maarsseveen I (The Netherlands)

Cited by 127 publications

References 17 publications

Parasitic chytrids sustain zooplankton growth during inedible algal bloom

Parasitic chytrids sustain zooplankton growth during inedible algal bloom

High habitat-specificity in fungal communities in oligo-mesotrophic, temperate Lake Stechlin (North-East Germany)

Morphological variation in Staurastrum rotula (Zygnemaphyceae, Desmidiales) in the deepest natural Brazilian lake: essence or accident?

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