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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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    Baltic Sea diazotrophic cyanobacterium is negatively affected by acidification and warming (2018)
    Inter Research
    In:  Marine Ecology Progress Series, 598 . pp. 49-60.
    Details
    Publication Date: 2021-02-08
    Description: Nitrogen fixation is a key source of nitrogen in the Baltic Sea which counteracts nitrogen loss processes in the deep anoxic basins. Laboratory and field studies have indicated that single-strain nitrogen-fixing (diazotrophic) cyanobacteria from the Baltic Sea are sensitive to ocean acidification and warming, two drivers of marked future change in the marine environment. Here, we enclosed a natural plankton community in twelve indoor mesocosms (volume ~1400 L) and manipulated pCO2 to yield six CO2 treatments with two different temperature treatments (16.6°C and 22.4°C, pCO2 range = 360 – 2030 μatm). We followed the filamentous, heterocystous diazotrophic cyanobacteria community (Nostocales, primarily Nodularia spumigena) over four weeks. Our results indicate that heterocystous diazotrophic cyanobacteria may become less competitive in natural plankton communities under ocean acidification. Elevated CO2 had a negative impact on Nodularia sp. biomass, which was exacerbated by warming. Our results imply that Nodularia sp. may contribute less to new nitrogen inputs in the Baltic Sea in future.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3354/meps12632
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  • 5
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    Plankton responses to ocean acidification: The role of nutrient limitation (2018)
    Elsevier
    In:  Progress in Oceanography, 165 . pp. 11-18.
    Details
    Publication Date: 2021-02-08
    Description: Highlights: • Ocean acidification increases phytoplankton standing stock. • This increase is more pronounced in smaller-sized taxa. • Primary consumers reac differently depending on nutrient availability. • Bacteria and micro-heterotrophs benefited under limiting conditions. • In general, heterotrophs are negatively affected at nutrient replete periods. Abstract: In situ mesocosm experiments on the effect of ocean acidification (OA) are an important tool for investigating potential OA-induced changes in natural plankton communities. In this study we combined results from various in-situ mesocosm studies in two different ocean regions (Arctic and temperate waters) to reveal general patterns of plankton community shifts in response to OA and how these changes are modulated by inorganic nutrient availability. Overall, simulated OA caused an increase in phytoplankton standing stock, which was more pronounced in smaller-sized taxa. This effect on primary producers was channelled differently into heterotroph primary consumers depending on the inorganic nutrient availability. Under limiting conditions, bacteria and micro-heterotrophs benefited with inconsistent responses of larger heterotrophs. During nutrient replete periods, heterotrophs were in general negatively affected, although there was an increase of some mesozooplankton developmental stages (i.e. copepodites). We hypothesize that changes in phytoplankton size distribution and community composition could be responsible for these food web responses.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.pocean.2018.04.006
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  • 6
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    Time-varying environmental control of phytoplankton in a changing estuarine system (2017)
    Elsevier
    In:  Science of the Total Environment, 609 . pp. 1390-1400.
    Details
    Publication Date: 2020-02-06
    Description: Highlights • Increasing influence of multiple environmental drivers produces changes on the temporal variability of species. • The intensity and hierarchy of drivers acting upon organisms within alternative regimes of variability may differ. • We identified regimes of variability of phytoplankton and depicted cascading effects of multiple drivers in each period. • The number of factors driving the response of phytoplankton increased along time and produced the erosion of productivity patterns. • The hierarchy and interactions of drivers changed over time, revealing that management policies require constant update. Abstract Estuaries are among the most valuable aquatic systems by their services to human welfare. However, increasing human activities at the watershed along with the pressure of climate change are fostering the co-occurrence of multiple environmental drivers, and warn of potential negative impacts on estuaries resources. At present, no clear understanding of how coastal ecosystems will respond to the non-stationary effect of multiple drivers. Here we analysed the temporal interaction among multiple environmental drivers and their changing priority on shaping phytoplankton response in the Bahía Blanca Estuary, SW Atlantic Ocean. The interaction among environmental drivers and the number of significant direct and indirect effects on chlorophyll concentration increased over time in concurrence with enhanced anthropogenic stress, changing winter climate and wind patterns. Over the period 1978–1993, proximal variables such as nutrients, water temperature and salinity, showed a dominant effect on chlorophyll, whereas in more recent years (1993–2009) climate signals (SAM and ENSO) boosted indirect effects through its influence on precipitation, wind, water temperature and turbidity. Turbidity emerged as the dominant driver of chlorophyll while in recent years acted synergistically with the concentration of dissolved nitrogen. As a result, chlorophyll concentration showed a significant negative trend and a loss of seasonal peaks reflecting a pronounced reorganisation of the phytoplankton community. We stress the need to account for the changing priority of drivers to understand, and eventually forecast, biological responses under projected scenarios of global anthropogenic change.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    DOI: 10.1016/j.scitotenv.2017.08.002
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  • 7
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    Influence of environmental gradients on C and N stable isotope ratios in coral reef biota of the Red Sea, Saudi Arabia (2014)
    Elsevier
    In:  Journal of Sea Research, 85 . pp. 379-394.
    Details
    Publication Date: 2017-07-19
    Description: The Red Sea features a natural environmental gradient characterized by increasing water temperature, nutrient and chlorophyll a concentrations from North to South. The aim of this study was to assess the relationships between ecohydrography, particulate organic matter (POM) and coral reef biota that are poorly understood by means of carbon (δ13C) and nitrogen (δ15N) stable isotopes. Herbivorous, planktivorous and carnivorous fishes, zooplankton, soft corals (Alcyonidae), and bivalves (Tridacna squamosa)were a priori defined as biota guilds. Environmental samples (nutrients, chlorophyll a), oceanographic data (salinity, temperature), POMand biotawere collected at eight coral reefs between 28°31′ N and 16°31′ N. Isotopic niches of guilds separated in δ13C and δ15N isotopic niche spaces and were significantly correlated with environmental factors at latitudinal scale. Dietary end member contributionswere estimated using the Bayesian isotope mixingmodel SIAR. POMand zooplankton 15N enrichment suggested influences by urban run-off in the industrialized central region of the Red Sea. Both δ15N and their relative trophic positions (RTPs) tend to increase southwards, but urban runoff offsets the natural environmental gradient in the central region of the Red Sea toward higher δ15N and RTPs. The present study reveals that consumer δ13C and δ15N in Red Sea coral reefs are influenced primarily by the latitudinal environmental gradient and localized urban runoff. This study illustrates the importance of ecohydrography when interpreting trophic relationships from stable isotopes in Red Sea coral reefs.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.seares.2013.07.008
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  • 8
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    Temperature effects on phytoplankton diversity - The zooplankton link (2014)
    Elsevier
    In:  Journal of Sea Research, 85 . pp. 359-364.
    Details
    Publication Date: 2017-07-19
    Description: Highlights: • We used indoor mesocosms to test the impact of warming on plankton communities. • Different stages of phytoplankton bloom were analysed. • Increased temperature and zooplankton grazing had similar effects on phytoplankton. • Warming and increased zooplankton density decreased phytoplankton richness. • Warming and increased zooplankton density increased phytoplankton evenness. Recent climate warming is expected to affect phytoplankton biomass and diversity in marine ecosystems. Temperature can act directly on phytoplankton (e.g. rendering physiological processes) or indirectly due to changes in zooplankton grazing activity. We tested experimentally the impact of increased temperature on natural phytoplankton and zooplankton communities using indoor mesocosms and combined the results from different experimental years applying a meta-analytic approach. We divided our analysis into three bloom phases to define the strength of temperature and zooplankton impacts on phytoplankton in different stages of bloom development. Within the constraints of an experiment, our results suggest that increased temperature and zooplankton grazing have similar effects on phytoplankton diversity, which are most apparent in the post-bloom phase, when zooplankton abundances reach the highest values. Moreover, we observed changes in zooplankton composition in response to warming and initial conditions, which can additionally affect phytoplankton diversity, because changing feeding preferences of zooplankton can affect phytoplankton community structure. We conclude that phytoplankton diversity is indirectly affected by temperature in the post-bloom phase through changing zooplankton composition and grazing activities. Before and during the bloom, however, these effects seem to be overruled by temperature enhanced bottom-up processes such as phytoplankton nutrient uptake.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.seares.2013.07.003
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  • 9
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    Simultaneous analysis of δ13C, δ15N and δ34S ratios uncovers food web relationships and the trophic importance of epiphytes in an eelgrass, Zostera marina community (2014)
    Inter Research
    In:  Marine Ecology Progress Series, 497 . pp. 93-103.
    Details
    Publication Date: 2019-02-06
    Description: Simultaneous analysis of carbon, nitrogen and sulphur stable isotope ratios was applied in this pilot study to examine the food web of a Zostera marina L. system in the western Baltic Sea. Samples of three potential food sources: eelgrass, epiphytic algae and seston, as well as 69 consumer species were collected during the growing season of Z. marina from March to September 2011. The measured δ13C values of epiphytes (-14.1‰ ± 1.8 SD) were close to δ13C values of eelgrass (-11.6‰ ± 1.8 SD), impeding a clear distinction of those two carbon sources, whereas seston δ13C values (-20.9‰ ± 3.5 SD) were clearly different. This frequently encountered problem was solved by the additional use of δ34S, which resulted in easily distinguishable values for sediment and seawater derived sulphur. Values of primary producer δ34S ranged from 5.6‰ (± 2.3 SD) for Z. marina leaves to 14.2‰ (± 1.6 SD) for epiphytes and 11.9‰ (± 3.3 SD) for seston. The combination of δ34S and δ13C values made a separation of carbon sources possible and enabled the allocation of potential food sources to consumers and a description of their trophic relationships. The data of stable isotope ratio analysis of this eelgrass community strongly indicate a food web based on epiphyte and seston production. δ15N values show a food web consisting of large numbers of generalists and a high degree of omnivory amongst the consumer species analysed. This implies an occupation of every trophic position possible, which is supported by a continuous distribution of δ15N values. Previously described eelgrass food webs may have to be re-evaluated to include sulfur in order to provide a clear picture on primary carbon sources.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.3354/meps10569
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  • 10
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    Some like it hot: the protozooplankton–copepod link in a warming ocean (2015)
    Inter Research
    In:  Marine Ecology Progress Series, 519 . pp. 103-113.
    Details
    Publication Date: 2020-01-21
    Description: The combined effects of warming and overwintering copepod densities on the spring succession of Baltic Sea plankton were investigated using indoor mesocosms. Three zooplankton (1.5, 4 and 10 copepods L-1) and two temperature levels called ∆0°C and ∆6°C (0°C and 6°C above the present day temperature scenario for Kiel Bight) were chosen. Both, the timing and the duration of the protozooplankton (PZP) bloom were significantly affected by temperature, but not by copepod density. In contrast, the bloom intensity of PZP was highly affected by the factors temperature and copepod density and its interaction. This suggests that at elevated temperature conditions PZP grows faster but, at the same time, are subject to higher top-down control by copepods. At low temperatures and low copepod densities, PZP in turn fully escaped from copepod predation. Further changes in the overwintering copepod densities resulted in a strong ciliate suppression of which small-sized ciliates (〈30 µm) were especially vulnerable to copepod predation while other PZP size classes remained unaffected. In conclusion, the results presented point at a pivotal regulating role of overwintering copepods under future warming condition. Further, warming was shown to cause a distinct match between phytoplankton and PZP thus strengthening trophic pathways through PZP. Our findings are discussed in the context of the ‘trophic link-sink’ debate by considering potential alterations in the flux of matter and energy up the food web.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3354/meps11081
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