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  • 1
    Book
    Book
    Biologische Meereskunde (2005)
    Berlin : Springer
    Details Availability
    Keywords: Marine biology ; Marine ecology ; Marine biology ; Marine ecology ; Lehrbuch ; Meeresbiologie ; Meeresbiologie
    Description / Table of Contents: Das Meer ist der größte Lebensraum der Erde - hier hat die Evolution der Organismen begonnen und hier findet sich auch die größte Vielfalt organismischer Baupläne. In lernfreundlicher Aufbereitung und leicht verständlichem Schreibstil gibt das Lehrbuch einen grundlegenden und umfassenden Überblick über die verschiedenen Lebensräume und Lebensgemeinschaften des Meeres. Ökologische Prozesse wie Konkurrenz, Freßbeziehungen, Symbiosen und Nahrungsnetze sind ein zentrales Thema des Buches. Die einzelnen Meeresorganismen werden ebenso beschrieben wie die Systemzusammenhänge. Zahlreiche Abbildungen regen zum Lesen und Lernen an. TOC:1. Einleitung.- 2. Physiklische und chemische Eigenschaften des Lebensraumes Meer.- 3. Ökophysiologie I: Anpassung an abiotische Umweltfaktoren.-4. Ökophysiologie II: Ernährung und Stoffwechsel.- 5. Populationsbiologie.- 6. Marine Lebensgemeinschaften I: Plankton und Nekton.- 7. Marine Lebensgemeinschaften II: Das Benthos harter Substrate.- 8. Marine Lebensgemeinschaften III: Das Benthos der Sedimente.- 9. Die Rolle der Meeresorganismen in den Kreisläufen biogener Elemente
    Type of Medium: Book
    Pages: XX, 412 S , Ill., graph. Darst.
    Edition: 2., überarb. Aufl.
    ISBN: 9783540230571 , 3540230572
    Series Statement: Springer-Lehrbuch
    URL: http://www.gbv.de/dms/bs/toc/396119395.pdf
    URL: https://swbplus.bsz-bw.de/bsz113700237cov.jpg
    URL: https://swbplus.bsz-bw.de/bsz113700237vlg.htm
    DDC: 570
    RVK:
    WI 4440
    RVK:
    WI 4410
    RVK:
    WB 4049
    Language: German
    Note: Literaturangaben
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  • 2
    Book
    Book
    Algen, Quallen, Wasserfloh : die Welt des Planktons (1996)
    Berlin : Springer
    Details Availability
    Keywords: Meeresökosystem ; Plankton ; See ; Ökosystem ; Plankton ; Meeresökosystem ; Plankton ; See ; Ökosystem ; Plankton ; Meeresökosystem ; Plankton ; See ; Ökosystem ; Plankton
    Description / Table of Contents: Freunden der Natur, der Seen und der Meere eröffnet dieses Buch einen Einblick in die oft mikroskopisch kleine Welt des Planktons. Zahlreiche Zeichnungen und Farbtafeln geben einen Eindruck von der Schönheit und Formenvielfalt vieler Plankter. Beispiele aus vielen Gewässern der Erde zeigen, welch wichtige Rolle das Plankton in der Nahrungskette spielt und wie es die Stoffkreisläufe im Wasser und sogar die Atmosphäre beeinflußt. Schließlich wird die Reaktion des Planktons auf die Gewässerversauerung und die Überdüngung gezeigt und erklärt, welches Gefährdungspotential von Giftalgen ausgehen kann.
    Type of Medium: Book
    Pages: VII, 192 S. , Ill., graph. Darst. , 21 cm
    ISBN: 3540603077
    URL: https://swbplus.bsz-bw.de/bsz051306034inh.htm
    DDC: 31
    RVK:
    WI 4750
    RVK:
    WI 4730
    RVK:
    WI 4745
    RVK:
    WI 4455
    Language: German
    Note: Literaturverz. S. 191 - 192
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  • 3
    Book
    Book
    Planktologie (1994)
    Berlin : Springer
    Details Availability
    Keywords: Lehrbuch ; Plankton
    Description / Table of Contents: Plankton ist die Summe der im Wasser (Meer- und Süßwasser) schwebenden Organismen pflanzlicher oder tierischer Herkunft. Da etwa 70 % der Erde mit Wasser bedeckt sind, bildet es die größte Lebensgemeinschaft der Erde. Hier ein Hochschullehrbuch vor allem über die allgemeinen Fragen (Physikalische und chemische Umwelt, Einfluß auf die Fischerei, Bedeutung für saubere Luft und Wasser, Geochemie, Populationen und ihre Vernetzungen, Grundformen der Planktonorganismen). Der Autor ist Professor am bekannten Kieler Institut für Meereskunde. Eine biologisch gut sortierte Bibliothek braucht das Buch. (3) (LK/KI: Bock)
    Type of Medium: Book
    Pages: XII, 274 S. , Ill., graph. Darst., Kt. , 24 cm
    ISBN: 9783540576761 , 3540576762
    URL: https://swbplus.bsz-bw.de/bsz041144422inh.htm
    DDC: 574.92
    RVK:
    WI 4750
    RVK:
    WI 4730
    RVK:
    WI 4440
    RVK:
    WI 4460
    RVK:
    AR 22200
    RVK:
    RZ 10525
    RVK:
    WI 4400
    RVK:
    WI 4470
    Language: German
    Note: Literaturverz. S. [259] - 265
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  • 4
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    Phytoplankton Cell Size Reduction in Response to Warming Mediated by Nutrient Limitation (2013)
    Public Library of Science
    In:  PLoS ONE, 8 (9). e71528.
    Details
    Publication Date: 2017-06-22
    Description: Shrinking of body size has been proposed as one of the universal responses of organisms to global climate warming. Using phytoplankton as an experimental model system has supported the negative effect of warming on body-size, but it remains controversial whether the size reduction under increasing temperatures is a direct temperature effect or an indirect effect mediated over changes in size selective grazing or enhanced nutrient limitation which should favor smaller cell-sizes. Here we present an experiment with a factorial combination of temperature and nutrient stress which shows that most of the temperature effects on phytoplankton cell size are mediated via nutrient stress. This was found both for community mean cell size and for the cell sizes of most species analyzed. At the highest level of nutrient stress, community mean cell size decreased by 46% per degrees C, while it decreased only by 4.7% at the lowest level of nutrient stress. Individual species showed qualitatively the same trend, but shrinkage per degrees C was smaller. Overall, our results support the hypothesis that temperature effects on cell size are to a great extent mediated by nutrient limitation. This effect is expected to be exacerbated under field conditions, where higher temperatures of the surface waters reduce the vertical nutrient transport.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1371/journal.pone.0071528
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  • 5
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    Warming and Ocean Acidification Effects on Phytoplankton - From Species Shifts to Size Shifts within Species in a Mesocosm Experiment (2015)
    Public Library of Science
    In:  PLoS ONE, 10 (5). e0125239.
    Details
    Publication Date: 2017-04-13
    Description: While the isolated responses of marine phytoplankton to climate warming and to ocean acidification have been studied intensively, studies on the combined effect of both aspects of Global Change are still scarce. Therefore, we performed a mesocosm experiment with a factorial combination of temperature (9 and 15°C) and pCO2 (means: 439 ppm and 1040 ppm) with a natural autumn plankton community from the western Baltic Sea. Temporal trajectories of total biomass and of the biomass of the most important higher taxa followed similar patterns in all treatments. When averaging over the entire time course, phytoplankton biomass decreased with warming and increased with CO2 under warm conditions. The contribution of the two dominant higher phytoplankton taxa (diatoms and cryptophytes) and of the 4 most important species (3 diatoms, 1 cryptophyte) did not respond to the experimental treatments. Taxonomic composition of phytoplankton showed only responses at the level of subdominant and rare species. Phytoplankton cell sizes increased with CO2 addition and decreased with warming. Both effects were stronger for larger species. Warming effects were stronger than CO2 effects and tended to counteract each other. Phytoplankton communities without calcifying species and exposed to short-term variation of CO2 seem to be rather resistant to ocean acidification.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1371/journal.pone.0125239
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  • 6
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    Phytoplankton cell size: intra- and interspecific effects of warming and grazing (2012)
    Public Library of Science
    In:  PLoS ONE, 7 (11). e49632.
    Details
    Publication Date: 2018-01-22
    Description: Decreasing body size has been suggested as the third universal biological response to global warming after latitudinal/altitudinal range shifts and shifts in phenology. Size shifts in a community can be the composite result of intraspecific size shifts and of shifts between differently sized species. Metabolic explanations for the size shifts dominate in the literature but top down effects, i.e. intensified size-selective consumption at higher temperatures, have been proposed as alternative explanation. Therefore, we performed phytoplankton experiments with a factorial combination of warming and consumer type (protist feeding mainly on small algae vs. copepods mainly feeding on large algae). Natural phytoplankton was exposed to 3 (1st experiment) or 4 (2nd experiment) temperature levels and 3 (1st experiment: nano-, microzooplankton, copepods) or 2 (2nd experiment: microzooplankton, copepods) types of consumers. Size shifts of individual phytoplankton species and community mean size were analyzed. Both, mean cell size of most of the individual species and mean community cell size decreased with temperature under all grazing regimes. Grazing by copepods caused an additional reduction in cell size. Our results reject the hypothesis, that intensified size selective consumption at higher temperature would be the dominant explanation of decreasing body size. In this case, the size reduction would have taken place only in the copepod treatments but not in the treatments with protist grazing (nano- and microzooplankton).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1371/ journal.pone.0049632
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  • 7
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    Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content (2016)
    Public Library of Science
    In:  PLoS ONE, 11 (5). e0155952.
    Details
    Publication Date: 2019-02-01
    Description: Concerns about increasing atmospheric CO2 concentrations and global warming have initiated studies on the consequences of multiple-stressor interactions on marine organisms and ecosystems. We present a fully-crossed factorial mesocosm study and assess how warming and acidification affect the abundance, body size, and fatty acid composition of copepods as a measure of nutritional quality. The experimental set-up allowed us to determine whether the effects of warming and acidification act additively, synergistically, or antagonistically on the abundance, body size, and fatty acid content of copepods, a major group of lower level consumers in marine food webs. Copepodite (developmental stages 1–5) and nauplii abundance were antagonistically affected by warming and acidification. Higher temperature decreased copepodite and nauplii abundance, while acidification partially compensated for the temperature effect. The abundance of adult copepods was negatively affected by warming. The prosome length of copepods was significantly reduced by warming, and the interaction of warming and CO2 antagonistically affected prosome length. Fatty acid composition was also significantly affected by warming. The content of saturated fatty acids increased, and the ratios of the polyunsaturated essential fatty acids docosahexaenoic- (DHA) and arachidonic acid (ARA) to total fatty acid content increased with higher temperatures. Additionally, here was a significant additive interaction effect of both parameters on arachidonic acid. Our results indicate that in a future ocean scenario, acidification might partially counteract some observed effects of increased temperature on zooplankton, while adding to others. These may be results of a fertilizing effect on phytoplankton as a copepod food source. In summary, copepod populations will be more strongly affected by warming rather than by acidifying oceans, but ocean acidification effects can modify some temperature impacts
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1371/journal.pone.0155952
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  • 8
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    Ocean acidification-induced food quality deterioration constrains trophic transfer (2012)
    Public Library of Science
    In:  PLoS ONE, 7 (4). e34737.
    Details
    Publication Date: 2018-12-11
    Description: Our present understanding of ocean acidification (OA) impacts on marine organisms caused by rapidly rising atmospheric carbon dioxide (CO2) concentration is almost entirely limited to single species responses. OA consequences for food web interactions are, however, still unknown. Indirect OA effects can be expected for consumers by changing the nutritional quality of their prey. We used a laboratory experiment to test potential OA effects on algal fatty acid (FA) composition and resulting copepod growth. We show that elevated CO2 significantly changed the FA concentration and composition of the diatom Thalassiosira pseudonana, which constrained growth and reproduction of the copepod Acartia tonsa. A significant decline in both total FAs (28.1 to 17.4 fg cell−1) and the ratio of long-chain polyunsaturated to saturated fatty acids (PUFA:SFA) of food algae cultured under elevated (750 µatm) compared to present day (380 µatm) pCO2 was directly translated to copepods. The proportion of total essential FAs declined almost tenfold in copepods and the contribution of saturated fatty acids (SFAs) tripled at high CO2. This rapid and reversible CO2-dependent shift in FA concentration and composition caused a decrease in both copepod somatic growth and egg production from 34 to 5 eggs female−1 day−1. Because the diatom-copepod link supports some of the most productive ecosystems in the world, our study demonstrates that OA can have far-reaching consequences for ocean food webs by changing the nutritional quality of essential macromolecules in primary producers that cascade up the food web.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    DOI: 10.1371/journal.pone.0034737
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  • 9
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    Nitrogen Fuelling of the Pelagic Food Web of the Tropical Atlantic (2015)
    Public Library of Science
    In:  PLoS ONE, 10 (6). e0131258.
    Details
    Publication Date: 2019-09-23
    Description: We estimated the relative contribution of atmosphere (ic Nitrogen (N) input (wet and dry deposition and N fixation) to the epipelagic food web by measuring N isotopes of different functional groups of epipelagic zooplankton along 23°W (17°N-4°S) and 18°N (20-24°W) in the Eastern Tropical Atlantic. Results were related to water column observations of nutrient distribution and vertical diffusive flux as well as colony abundance of Trichodesmium obtained with an Underwater Vision Profiler (UVP5). The thickness and depth of the nitracline and phosphocline proved to be significant predictors of zooplankton stable N isotope values. Atmospheric N input was highest (61% of total N) in the strongly stratified and oligotrophic region between 3 and 7°N, which featured very high depth-integrated Trichodesmium abundance (up to 9.4×104 colonies m-2), strong thermohaline stratification and low zooplankton δ15N (~2‰). Relative atmospheric N input was lowest south of the equatorial upwelling between 3 and 5°S (27%). Values in the Guinea Dome region and north of Cape Verde ranged between 45 and 50%, respectively. The microstructure-derived estimate of the vertical diffusive N flux in the equatorial region was about one order of magnitude higher than in any other area (approximately 8 mmol m-2 d 1). At the same time, this region received considerable atmospheric N input (35% of total). In general, zooplankton δ15N and Trichodesmium abundance were closely correlated, indicating that N fixation is the major source of atmospheric N input. Although Trichodesmium is not the only N fixing organism, its abundance can be used with high confidence to estimate the relative atmospheric N input in the tropical Atlantic (r2 = 0.95). Estimates of absolute N fixation rates are two- to tenfold higher than incubation-derived rates reported for the same regions. Our approach integrates over large spatial and temporal scales and also quantifies fixed N released as dissolved inorganic and organic N. In a global analysis, it may thus help to close the gap in oceanic N budgets.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: text
    Format: text
    DOI: 10.1371/journal.pone.0131258
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  • 10
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    Variability and Community Composition of Marine Unicellular Eukaryote Assemblages in a Eutrophic Mediterranean Urban Coastal Area with Marked Plankton Blooms and Red Tides (2020)
    MDPI
    Details
    Publication Date: 2023-02-08
    Description: The Thessaloniki Bay is a eutrophic coastal area which has been characterized in recent years by frequent and intense phytoplankton blooms and red tides. The aim of the study was to investigate the underexplored diversity of marine unicellular eukaryotes in four different sampling sites in Thessaloniki Bay during a year of plankton blooms, red tides, and mucilage aggregates. High-Throughput Sequencing (HTS) was applied in extracted DNA from weekly water samples targeting the 18S rRNA gene. In almost all samples, phytoplankton blooms and/or red tides and mucilage aggregates were observed. The metabarcoding analysis has detected the known unicellular eukaryotic groups frequently observed in the Bay, dominated by Bacillariophyta and Dinoflagellata, and revealed taxonomic groups previously undetected in the study area (MALVs, MAST, and Cercozoa). The dominant OTUs were closely related to species known to participate in red tides, harmful blooms, and mucilage aggregates. Other OTUs, present also during the blooms in low abundance (number of reads), were closely related to known harmful species, suggesting the occurrence of rare taxa with potential negative impacts on human health not detectable with classical microscopy. Overall, the unicellular eukaryote assemblages showed temporal patterns rather than small-scale spatial separation responding to the variability of physical and chemical factors.
    Type: Article , PeerReviewed
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