Preservation of Samples and Quantitative Determination of the Plankton

Gran, H. H.

doi:10.1093/icesjms/s1.62.3

Cited by 3 publications

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“…The records from 1896 and 1897 were quantified by weight, and taxon abundance is categorised as “rare” (r), “rather common” (+), “common” (c) and “very common” (cc) 13 . In 1916 and 1917, Grans filtration method 15 was used, and the number was given in cell counts per litre. From 1916 to 1993, the data is reported only as phytoplankton abundance (N, number of cells per litre).…”

Section: Methodsmentioning

confidence: 99%

Marine phytoplankton community data and corresponding environmental properties from eastern Norway, 1896–2020

et al. 2022

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Time series are essential for studying the long-term effects of human impact and climatic changes on the natural environment. Although data exist, no long-term phytoplankton dataset for the Norwegian coastal area has been compiled and made publicly available in a standardised format. Here we report on a compilation of phytoplankton data from inner Oslofjorden going back more than a century. The database contains 605 sampling events from 1896 to 2020, and environmental data has also been provided when available. Although the sampling frequency has varied over time, the high taxonomic quality and relatively similar methodology make it very useful. For the last 15 years (2006–2020), the sampling frequency has been almost monthly throughout the year. This dataset can be used for time series analysis to understand community structure and changes over time. It can also be used to study common taxa’ responses to environmental variables and changes, seasonal or annual species diversity and be useful for developing ecological indicators.

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Section: Methodsmentioning

confidence: 99%

Marine phytoplankton community data and corresponding environmental properties from eastern Norway, 1896–2020

et al. 2022

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A Seasonal Study of the Microflora and Micro-Fauna of Florida Lake, Johannesburg, Transvaal

Schuurman

1932

Transactions of the Royal Society of South Africa

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FORMATION OF RESTING SPORES BY LEPTOCYLINDRUS DANICUS (BACILLARIOPHYCEAE) IN A CONTROLLED EXPERIMENTAL ECOSYSTEM¹

Davis

Hollibaugh

Seibert

et al. 1980

Journal of Phycology

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Leptocylindrus danicus Cleve became the dominant phytoplankton species, comprising 70–80% of the total assemblage, in one of the CEPEX Controlled Experimental Ecosystems (CEE) at Saanich Inlet, British Columbia (Canada). In the first week of June, when nitrate levels were reduced below 0.5 μm, the majority of the L. danicus cells present in the CEE formed resting spores. The spores were heavily armored with spines and appeared to sink unmolested to the bottom of the CEE. Four continuous cultures were started with an inoculum from the CEE and, in a 24 h period when N became depleted, 86% of the L. danicus present (∼80% of the total phytoplankton assemblage) formed resting spores. A daily dilution culture with nutrients kept at saturating levels was started at the same time from the same inoculum and continued for 2 wk beyond the spore formation event in the N‐limited cultures. No spores were observed in the nutrient‐saturated culture, indicating that N limitation was necessary to trigger spore formation. Spores were kept in the dark at 3 and 10 C. After 36 and 97 days, a large percentage of the spores germinated. After 214 days, >1% of the spores were still capable of germination. Laboratory studies with L. danicus isolated from the CEE confirmed that N limitation was the primary factor triggering spore formation. Microscope observations of these cultures indicated that the spores were formed by auxospores following sexual reproduction.

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Preservation of Samples and Quantitative Determination of the Plankton

Cited by 3 publications

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Marine phytoplankton community data and corresponding environmental properties from eastern Norway, 1896–2020

Marine phytoplankton community data and corresponding environmental properties from eastern Norway, 1896–2020

A Seasonal Study of the Microflora and Micro-Fauna of Florida Lake, Johannesburg, Transvaal

FORMATION OF RESTING SPORES BY LEPTOCYLINDRUS DANICUS (BACILLARIOPHYCEAE) IN A CONTROLLED EXPERIMENTAL ECOSYSTEM¹

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Preservation of Samples and Quantitative Determination of the Plankton

Cited by 3 publications

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Marine phytoplankton community data and corresponding environmental properties from eastern Norway, 1896–2020

Marine phytoplankton community data and corresponding environmental properties from eastern Norway, 1896–2020

A Seasonal Study of the Microflora and Micro-Fauna of Florida Lake, Johannesburg, Transvaal

FORMATION OF RESTING SPORES BY LEPTOCYLINDRUS DANICUS (BACILLARIOPHYCEAE) IN A CONTROLLED EXPERIMENTAL ECOSYSTEM1

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FORMATION OF RESTING SPORES BY LEPTOCYLINDRUS DANICUS (BACILLARIOPHYCEAE) IN A CONTROLLED EXPERIMENTAL ECOSYSTEM¹