The northern Baltic Sea phytoplankton communities in 1903–1911 and 1993–2005: a comparison of historical and modern species data

Hällfors, Heidi; Backer, Hermanni; Leppänen, Juha-Markku; Hällfors, Seija; Hällfors, Guy; Kuosa, Harri

doi:10.1007/s10750-012-1414-4

Cited by 38 publications

(54 citation statements)

References 52 publications

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“…Other local cyanobacterial lists were published in the past 15 years from continental parts of Europe, e.g. Slovakia, Sweden, Poland, Romania, Ukraine, Slovenia, the Netherlands, and the Czech Republic (Kaštovský et al 2010 and references therein), as well as a checklist from the Baltic Sea reporting 172 cyanobacterial species (Hällfors 2004). The Czech Republic list comprises 505 species, 392 of which are considered recently present according to Kaštovský et al 2010.…”

Section: Discussionmentioning

confidence: 99%

Cyanobacteria of Greece: an annotated checklist

Gkelis¹,

Ourailidis²,

Panou³

et al. 2016

BDJ

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BackgroundThe checklist of Greek Cyanobacteria was created in the framework of the Greek Taxon Information System (GTIS), an initiative of the LifeWatchGreece Research Infrastructure (ESFRI) that has resumed efforts to compile a complete checklist of species reported from Greece. This list was created from exhaustive search of the scientific literature of the last 60 years. All records of taxa known to occur in Greece were taxonomically updated.New informationThe checklist of Greek Cyanobacteria comprises 543 species, classified in 130 genera, 41 families, and 8 orders. The orders Synechococcales and Oscillatoriales have the highest number of species (158 and 153 species, respectively), whereas these two orders along with Nostocales and Chroococcales cover 93% of the known Greek cyanobacteria species. It is worth mentioning that 18 species have been initially described from Greek habitats. The marine epilithic Ammatoidea aegea described from Saronikos Gulf is considered endemic to this area. Our bibliographic review shows that Greece hosts a high diversity of cyanobacteria, suggesting that the Mediterranean area is also a hot spot for microbes.

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Section: Discussionmentioning

confidence: 99%

Cyanobacteria of Greece: an annotated checklist

Gkelis¹,

Ourailidis²,

Panou³

et al. 2016

BDJ

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“…The ICES historical plankton dataset used in this study is a dataset of plankton samples collected in the North Atlantic between 1902 and 1912, digitised from historical log books. Hällfors et al (2013) compared phytoplankton records from this 'rescued' ICES historical dataset in the Baltic Sea with contemporary phytoplankton samples, and documented compositional differences between the two time periods, potentially driven by both climate change and eutrophication. By comparing the ICES historical dataset with North Sea data from the CPR survey, we can better understand changes occurring in North Sea plankton communities pre-1950s, facilitating further exploration of the effects of large scale temperature change to the Continuous Plankton Recorder temporal coverage.…”

Section: Introductionmentioning

confidence: 99%

A century of change in North Sea plankton communities explored through integrating historical datasets

Bedford

Johns

McQuatters‐Gollop

2018

ICES Journal of Marine Science

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Plankton communities make useful ecosystem indicators, and taking a historical perspective on plankton community composition provides insights into large-scale environmental change. Much of our understanding of long temporal-scale change in plankton communities in the North Sea has been provided by the Continuous Plankton Recorder (CPR) survey, operating since 1931, with consistent time-series data available since 1958. This article further increases the temporal scale of our understanding of community change in the North Sea by combining the CPR dataset with a digitized collection of plankton surveys undertaken by ICES from 1902 to 1912. After steps taken to integrate the two disparate datasets, differences in overall community composition between time periods suggest that the multidecadal changes observed through the CPR survey time period may have occurred from a non-stable baseline that was already on a trajectory of change. Therefore, a stable historical time period in which plankton communities are assessed against for any impact of human pressures may be hard to define for the North Sea and instead underlying variation needs to be encompassed within any baseline chosen. Further evidence for the influence of large-scale changes in sea surface temperature driving change in plankton community composition was found using the extended dataset.

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“…In their evaluation of monitoring data from the Northern Baltic Proper and the Gulf of Finland collected between 1903 and 1911, Hällfors et al (2013) noted the difficulty and limitations of comparing historical with recent data at the species level, because of advancements in the taxonomic methods. There have been numerous taxonomic revisions, including the merging or splitting of taxa, as well as new descriptions.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, in the past, only nets with a crude, undefined mesh size were available for sample enrichment, such that smaller organisms were unpredictably lost during sieving. Thus, in the study of Hällfors et al (2013), the reported spectrum of diatoms and dinoflagellates is highly incomplete, as it includes only the few reliable and large-celled species. Furthermore, spring data were collected only in May while earlier bloom stages were neglected.…”

Section: Introductionmentioning

confidence: 99%

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The Diatom/Dinoflagellate Index as an Indicator of Ecosystem Changes in the Baltic Sea. 2. Historical Data for Use in Determination of Good Environmental Status

Wasmund

2017

Front. Mar. Sci.

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The diatom/dinoflagellate index (Dia/Dino index) serves as an indicator in the assessment of the ecological status of the Baltic Sea within the scope of the Marine Strategy Framework Directive (MSFD). It describes the dominance patterns in the phytoplankton spring bloom. Implementation of this indicator requires a definition of the conditions describing good environmental status (GES). The aim of this study was to determine thresholds for GES for the Dia/Dino index on the basis of historical phytoplankton data from different regions of the Baltic Sea. Data from the first half of the twentieth century, corresponding to the pre-eutrophication period, provide an unadulterated reference, as exemplified by nutrient data. Early phytoplankton data showed high dominance of diatoms over dinoflagellates in spring blooms. Diatom dominance relates to a Dia/Dino index >0.5, which allowed GES threshold of the Eastern Gotland Basin to be set at a Dia/Dino index of 0.5. The consistently very high Dia/Dino index in Kiel and Mecklenburg Bays supported a previously suggested GES threshold value of 0.75. Recent monitoring data revealed a sudden decrease of the Dia/Dino index, especially between 1984 and 1991, and thus a worsening environmental status. This deterioration could be attributed to warming rather than to eutrophication.

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The northern Baltic Sea phytoplankton communities in 1903–1911 and 1993–2005: a comparison of historical and modern species data

Cited by 38 publications

References 52 publications

Cyanobacteria of Greece: an annotated checklist

Cyanobacteria of Greece: an annotated checklist

A century of change in North Sea plankton communities explored through integrating historical datasets

The Diatom/Dinoflagellate Index as an Indicator of Ecosystem Changes in the Baltic Sea. 2. Historical Data for Use in Determination of Good Environmental Status

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