Archives: Bibliographies

Title

A mathematical modelling of bloom of the coccolithophore Emiliania huxleyi in a mesocosm experiment

Publication Type

Journal Article

Year of Publication

2008

Authors

Joassin P, Delille B, Soetaert K, Borges AV, Chou L, Engel A, Gattuso JP, Harlay J, Riebesell U, Suykens K, Gregoire M

Journal

Biogeosciences Discussions

Volume

5

Pagination

787-840

ISBN Number

Keywords

CO2 enrichment, PEECE, Emiliania huxleyi, mesocosm model, mesocosm, Raunefjorden, Norway, 20 m3

Abstract

URL

Date of Published

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Type of Article

Alternate Journal

Title

Influence of water-column depth and mixing on phytoplankton biomass, community composition, and nutrients

Publication Type

Journal Article

Year of Publication

2008

Authors

Jäger CG, Diehl S, Schmidt GM

Journal

Limnology and Oceanography

Volume

53

Pagination

2361-2373

ISBN Number

0024-3590

Keywords

fluctuating light, natural phytoplankton, Competition, gradient, lake, stoichiometry, population, dominance, Dynamics, growth, freshwater, mesocosm, scaling, Lake Brunnsee, Munich, Germany

Abstract

We independently manipulated mixing intensity (strong artificial mixing vs. background turbulence) and water-column depth (2 m, 4 m, 8 m, and 12 m) in order to explore their separate and combined effects in a field enclosure experiment. To accentuate the vertical light gradient, enclosures had black walls, resulting in a euphotic depth of only 3.7 m. All enclosures were placed in a well-mixed water bath to equalize temperature across treatments. Phytoplankton responded to an initial phosphorus pulse with a transient increase in biomass, which was highest in the shallowest, least light-limited water columns where dissolved mineral phosphorus subsequently became strongly limiting. As a consequence, the depth-averaged mineral phosphorus concentration increased and the seston carbon (C) : phosphorous (P) ratio decreased with increasing water-column depth. Low turbulence enclosures became quickly dominated by motile taxa (flagellates) in the upper water column, whereas mixed enclosures became gradually dominated by pennate diatoms, which resulted in higher average sedimentation rates in the mixed enclosures over the 35-d experimental period. Low turbulence enclosures showed pronounced vertical structure in water columns >4 m, where diversity was higher than in mixed enclosures, suggesting vertical niche partitioning. This interpretation is supported by a primary production assay, where phytoplankton originating from different water depths in low-turbulence treatments had the relatively highest primary productivity when incubated at their respective depths of origin.

URL

Date of Published

Nov

Accession Number

WOS:000261355500001

Type of Article

Article

Alternate Journal

Limnol. Oceanogr.

Title

Physiological response of the copepod Pseudocalanus sp in the Baltic Sea at different thermal scenarios

Publication Type

Journal Article

Year of Publication

2008

Authors

Isla JA, Lengfellner K, Sommer U

Journal

Global Change Biology

Volume

14

Pagination

895-906

ISBN Number

1354-1013

Keywords

Baltic, Germany, egg production, fecal pellet production, mortality, net growth efficiency, pseudocalanus sp, respiration, temperature, marine planktonic copepods, Calanus, phytoplankton concentration, physio ecology, climate change, Acartia, global rates, body weight, north sea, mesocosm, Kiel, 1.4 m3

Abstract

We studied the physiological response of Pseudocalanus sp. under four different temperature elevation regimes: +0, +2, +4 and +6 degrees C above the decadal average temperature in the Western Baltic Sea. We measured fecal pellet (FP) production rates, which was taken as a proxy of ingestion, egg production (EPR) and respiration rates. Experiments lasted from mid-February to end April, corresponding most of the observations to the postspring bloom phase. We combined small scale incubations with the use of big (ca. 1400 L) mesocosms, which have previously been shown to be appropriate when studying phyto- and zooplankton succession, and the water used for the incubations was taken from the mesocosm tanks. Given that the phytoplankton succession varied between the four thermal scenarios, we evaluated (excepting in the case of the respiration rates, where incubations were carried out using 0.2 mu m filtered water) both the temperature and the associated food concentration effects. Respiration and ingestion rates were found to increase with temperature. As for EPR, they also increased with temperature during the bloom, but remained at low and constant values during the postbloom in all the four treatments due to the food limitation. Linked to the temperature rise, we also detected an increase in instantaneous mortality rates and a reduction in the net growth efficiency. Finally, we discuss the potential implications of our findings for the spring phyto- and zooplankton succession under the forecasted climate warming, as well as for the fisheries in the Baltic Sea, where Pseudocalanus sp. is a key species.

URL

Date of Published

Apr

Accession Number

ISI:000254126300015

Type of Article

Alternate Journal

Global Change Biol

Title

Climate warming in winter affects the coupling between phytoplankton and bacteria during the spring bloom: a mesocosm study

Publication Type

Journal Article

Year of Publication

2008

Authors

Hoppe HG, Breithaupt P, Walther K, Koppe R, Bleck S, Sommer U, Jurgens K

Journal

Aquatic Microbial Ecology

Volume

51

Pagination

105-115

ISBN Number

Keywords

Bacterial secondary production, Germany, Baltic, climate change, global warming, Marine bacteria, mesocosm, Primary production, respiration, land based, Kiel, 1.4 m3

Abstract

URL

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Type of Article

Alternate Journal

Title

Plankton stress responses from PAH exposure and nutrient enrichment

Publication Type

Journal Article

Year of Publication

2008

Authors

Hjorth M, Forbes VE, Dahllof I

Journal

Marine Ecology Progress Series

Volume

363

Pagination

121-130

ISBN Number

Keywords

Plankton, PAH, Food web, Stress, Function, Nutrient status, Marine, mesocosm, 3 m3, Isefjord, Denmark

Abstract

URL

Date of Published

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Type of Article

Alternate Journal

Title

Harmful algal blooms of allelopathic microalgal species: The role of eutrophication

Publication Type

Journal Article

Year of Publication

2008

Authors

Graneli E, Weberg M, Salomon PS

Journal

Harmful Algae

Volume

8

Pagination

94-102

ISBN Number

Keywords

Allelochemicals, USA, Allelopathy, eutrophication, Harmful algae, phytoplankton, Toxins, mesocosm, Lake Possum Kingdom Reservoir, Texas, 1.5 m3, freshwater

Abstract

URL

Date of Published

Accession Number

Type of Article

Alternate Journal

Title

Detection of Large Numbers of Novel Sequences in the Metatranscriptomes of Complex Marine Microbial Communities

Publication Type

Journal Article

Year of Publication

2008

Authors

Gilbert JA, Field D, Huang Y, Edwards R, Li W, Gilna P, Joint I

Journal

PLOS one

Volume

Pagination

ISBN Number

Keywords

mesocosm, pyrosequencing, microbial community, 11 m3, Bergen, Espegrend, Norway

Abstract

Background: Sequencing the expressed genetic information of an ecosystem (metatranscriptome) can provide informationabout the response of organisms to varying environmental conditions. Until recently, metatranscriptomics has been limitedto microarray technology and random cloning methodologies. The application of high-throughput sequencing technologyis now enabling access to both known and previously unknown transcripts in natural communities.Methodology/Principal Findings: We present a study of a complex marine metatranscriptome obtained from randomwhole-community mRNA using the GS-FLX Pyrosequencing technology. Eight samples, four DNA and four mRNA, wereprocessed from two time points in a controlled coastal ocean mesocosm study (Bergen, Norway) involving an inducedphytoplankton bloom producing a total of 323,161,989 base pairs. Our study confirms the finding of the first publishedmetatranscriptomic studies of marine and soil environments that metatranscriptomics targets highly expressed sequenceswhich are frequently novel. Our alternative methodology increases the range of experimental options available forconducting such studies and is characterized by an exceptional enrichment of mRNA (99.92%) versus ribosomal RNA.Analysis of corresponding metagenomes confirms much higher levels of assembly in the metatranscriptomic samples and afar higher yield of large gene families with .100 members, ,91% of which were novel.Conclusions/Significance: This study provides further evidence that metatranscriptomic studies of natural microbialcommunities are not only feasible, but when paired with metagenomic data sets, offer an unprecedented opportunity toexplore both structure and function of microbial communities – if we can overcome the challenges of elucidating thefunctions of so many never-seen-before gene families

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Date of Published

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Type of Article

Alternate Journal

Title

Effects of CO2 on particle size distribution and phytoplankton abundance during a mesocosm bloom experiment (PeECE II)

Publication Type

Journal Article

Year of Publication

2008

Authors

Engel A, Schulz KG, Riebesell U, Bellerby RGJ, Delille B, Schartau M

Journal

Biogeosciences

Volume

5

Pagination

509-521

ISBN Number

Keywords

CO2 enrichment, PEECE, particle size, phytoplankton, abundance, mesocosm, Raunefjorden, Norway, 20 m3, Espegrend

Abstract

URL

Date of Published

Accession Number

Type of Article

Alternate Journal

Title

Interaction of nitrogen status and UVB sensitivity in a temperate phytoplankton assemblage

Publication Type

Journal Article

Year of Publication

2008

Authors

Bouchard JN, Longhi ML, Roya S, Campbell DA, Ferreyra G

Journal

Journal of Experimental Marine Biology and Ecology

Volume

359

Pagination

67-76

ISBN Number

Keywords

Chlorophyll fluorescence, D1 protein, Nitrate availability, Non-photochemical quenching, Photoinhibition, phytoplankton, RuBisCO LSU, Ultraviolet radiation, UVB, mesocosm, 1.8 m3, St. Lawrence estuary, Canada

Abstract

URL

Date of Published

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Type of Article

Alternate Journal

Title

Marine ecosystem community carbon and nutrient uptake stoichiometry under varying ocean acidification during the PeECE III experiment

Publication Type

Journal Article

Year of Publication

2008

Authors

Bellerby RGJ, Schulz KG, Riebesell U, Neill C, Nondal G, Heegaard E, Johannessen T, Brown KR

Journal

Biogeosciences

Volume

5

Pagination

1517-1527

ISBN Number

Keywords

CO2 enrichment, PEECE, Carbon uptake, Nutrient uptake, mesocosm, Raunefjorden, Norway, 25 m3

Abstract

URL

Date of Published

Accession Number

Type of Article

Alternate Journal