Protistan diversity does peak in the horohalinicum of the Baltic Sea: Reply to Ptacnik et al. (2011)

Telesh, Irena V.; Schubert, Hendrik; Skarlato, Sergei

doi:10.3354/meps09217

Cited by 24 publications

(11 citation statements)

References 33 publications

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“…). Our findings support the hypothesis that the Remane curve is inappropriate for planktonic microorganisms (Herlemann et al ., ; Telesh et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Tideless estuaries in brackish seas as possible freshwater‐marine transition zones for bacteria: the case study of the Vistula river estuary

Gołębiewski

Całkiewicz

Creer

et al. 2017

Environ Microbiol Rep

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Most bacteria are found either in marine or fresh waters and transitions between the two habitats are rare, even though freshwater and marine bacteria co-occur in brackish habitats. Estuaries in brackish, tideless seas could be habitats where the transition of freshwater phylotypes to marine conditions occurs. We tested this hypothesis in the Gulf of Gdańsk (Baltic Sea) by comparing bacterial communities from different zones of the estuary, via pyrosequencing of 16S rRNA amplicons. We predicted the existence of a core microbiome (CM, a set of abundant OTUs present in all samples) comprising OTUs consisting of populations specific for particular zones of the estuary. The CMs for the entire studied period consisted of only eight OTUs, and this number was even lower for specific seasons: five in spring, two in summer, and one in autumn and winter. Six of the CM OTUs, and another 21 of the 50 most abundant OTUs consisted of zone-specific populations, plausibly representing micro-evolutionary forces. The presence of up to 15% of freshwater phylotypes from the Vistula River in the brackish Gulf of Gdańsk supported our hypothesis, but high dissimilarity between the bacterial communities suggested that freshwater-marine transitions are rare even in tideless estuaries in brackish seas.

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“…). Our findings support the hypothesis that the Remane curve is inappropriate for planktonic microorganisms (Herlemann et al ., ; Telesh et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Tideless estuaries in brackish seas as possible freshwater‐marine transition zones for bacteria: the case study of the Vistula river estuary

Gołębiewski

Całkiewicz

Creer

et al. 2017

Environ Microbiol Rep

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“…Recently, Telesh et al suggested the opposite pattern for protists, with a species-maximum in the horohariculum (Telesh et al, 2011b). The analysis was based on pooling species observations within salinity ranges from multiple studies, but has been questioned, since the intermediate salinity where the highest diversity was observed was also the most frequently sampled (Ptacnik et al, 2011;Telesh et al, 2011a), hence the pattern could stem from sampling biases. Here we took the opportunity to measure alpha-diversity with our metabarcoding dataset.…”

Section: Discussionmentioning

confidence: 99%

“…The intermediate salinity and subarctic conditions constrain the macrobial biodiversity in the Baltic Sea, and its multicellular species are fewer and typically genetically impoverished compared to the populations of the NE Atlantic (Johannesson and André, 2006). In contrast, bacterioplankton diversity does not appear to decrease at intermediate salinities (Herlemann et al, 2011), and for protists it has even been suggested that species richness is actually highest in the horohalinicum region (salinity 5-8 PSU; (Telesh et al, 2011a(Telesh et al, , 2013).…”

Section: Introductionmentioning

confidence: 99%

Diversity of Pico- to Mesoplankton Along the 2000 km Salinity Gradient of the Baltic Sea

Karlson

Charvet

et al. 2015

Preprint

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Microscopic plankton form the productive base of both marine and freshwater ecosystems and are key drivers of global biogeochemical cycles of carbon and nutrients. Plankton diversity is immense with representations from all major phyla within the three domains of life. So far, plankton monitoring has mainly been based on microscopic identification, which has limited sensitivity and reproducibility, not least because of the numerical majority of plankton being unidentifiable under the light microscope. High-throughput sequencing of taxonomic marker genes offers a means to identify taxa inaccessible by traditional methods; thus, recent studies have unveiled an extensive previously unknown diversity of plankton. Here, we conducted ultradeep Illumina sequencing (average 10 5 sequences/sample) of rRNA gene amplicons of surface water eukaryotic and bacterial plankton communities along a 2000 km transect following the salinity gradient of the Baltic Sea. Community composition was strongly correlated with salinity for both bacterial and eukaryotic plankton assemblages, highlighting the importance of salinity for structuring the biodiversity within this ecosystem. The distribution of major planktonic taxa followed expected patterns as observed in monitoring programs, but also novel groups to the Baltic were identified, such as relatives to the coccolithophore Emiliana huxleyi in the northern Baltic Sea. The deep sequencing also enabled accurate enumeration of highly resolved (> 99% identity) operational taxonomic units, which revealed contrasting distribution profiles among closely related populations, reflecting niche partitioning into ecotypes. This study provides the first ultra-deep sequencing-based survey on eukaryotic and bacterial plankton biogeography in the Baltic Sea.peer-reviewed)

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“…The intermediate salinity and subarctic conditions constrain the macrobial biodiversity in the Baltic Sea, and its multicellular species are fewer and typically genetically impoverished compared to the populations of the NE Atlantic (Johannesson and André, 2006 ). In contrast, bacterioplankton diversity does not appear to decrease at intermediate salinities (Herlemann et al, 2011 ), and for protists it has even been suggested that species richness is actually highest in the horohalinicum region (salinity 5–8; Telesh et al, 2011a , 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Diversity of Pico- to Mesoplankton along the 2000 km Salinity Gradient of the Baltic Sea

et al. 2016

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Microbial plankton form the productive base of both marine and freshwater ecosystems and are key drivers of global biogeochemical cycles of carbon and nutrients. Plankton diversity is immense with representations from all major phyla within the three domains of life. So far, plankton monitoring has mainly been based on microscopic identification, which has limited sensitivity and reproducibility, not least because of the numerical majority of plankton being unidentifiable under the light microscope. High-throughput sequencing of taxonomic marker genes offers a means to identify taxa inaccessible by traditional methods; thus, recent studies have unveiled an extensive previously unknown diversity of plankton. Here, we conducted ultra-deep Illumina sequencing (average 105 sequences/sample) of rRNA gene amplicons of surface water eukaryotic and bacterial plankton communities sampled in summer along a 2000 km transect following the salinity gradient of the Baltic Sea. Community composition was strongly correlated with salinity for both bacterial and eukaryotic plankton assemblages, highlighting the importance of salinity for structuring the biodiversity within this ecosystem. In contrast, no clear trends in alpha-diversity for bacterial or eukaryotic communities could be detected along the transect. The distribution of major planktonic taxa followed expected patterns as observed in monitoring programs, but groups novel to the Baltic Sea were also identified, such as relatives to the coccolithophore Emiliana huxleyi detected in the northern Baltic Sea. This study provides the first ultra-deep sequencing-based survey on eukaryotic and bacterial plankton biogeography in the Baltic Sea.

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Protistan diversity does peak in the horohalinicum of the Baltic Sea: Reply to Ptacnik et al. (2011)

Cited by 24 publications

References 33 publications

Tideless estuaries in brackish seas as possible freshwater‐marine transition zones for bacteria: the case study of the Vistula river estuary

Tideless estuaries in brackish seas as possible freshwater‐marine transition zones for bacteria: the case study of the Vistula river estuary

Diversity of Pico- to Mesoplankton Along the 2000 km Salinity Gradient of the Baltic Sea

Diversity of Pico- to Mesoplankton along the 2000 km Salinity Gradient of the Baltic Sea

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