Anmerkung: 978-1-4020-6214-8_Book_OnlinePDF.pdf -- BIOG_83_1-3_bookprelim1.pdf -- BIOG_83_1-3_bookprelim2.pdf -- BIOG_83_1-3_bookprelim3.pdf -- BIOG_83_1-3_bookprelim4.pdf -- biog_83_1_Prelim_v_vi.pdf -- Introduction -- A taxonomic review of the genus Phaeocystis -- Abstract -- Introduction -- Molecular analysis -- Molecular clock -- Formally described species -- Undescribed species -- Outlook -- References -- Methods used to reveal genetic diversity in the colony-forming prymnesiophytes Phaeocystis antarctica, P. globosa and P. pouchetii-preliminary results -- Abstract -- Introduction -- AmpliWed fragment length polymorphism -- Microsatellite markers -- References -- The life cycle of Phaeocystis: state of knowledge and presumptive role in ecology -- Abstract -- Introduction -- Morphotypes among Phaeocystis species -- Morphotypes of P. globosa -- Colonial cells -- Haploid Xagellates -- Diploid Xagellates -- Morphotypes of P. pouchetii -- Colonial cells -- Flagellates -- Morphotypes of P. antarctica -- Colonial cells -- Flagellates -- Morphotypes of P. jahnii -- Colonial cells -- Flagellates -- Morphotype of P. cordata -- Morphotype of P. scrobiculata -- Synthesis of the observed morphotypes -- The Phaeocystis life cycle -- The haploid-diploid life cycle of P. globosa -- Phaeocystis globosa colony blooms result from sexual processes -- Vegetative reproduction in P. globosa -- Factors inducing phase changes within the P. globosa life cycle -- The life cycle of the other Phaeocystis species -- The haploid-diploid life cycle of Prymnesiophytes -- The ecological relevance of the haploid-diploid life cycle of P. globosa -- The advantage of haploid-diploid life cycles -- The ecology of P. globosa morphotypes -- Conclusions -- References. , Phaeocystis colony distribution in the North Atlantic Ocean since 1948, and interpretation of long-term changes in the Phaeocystis hotspot in the North Sea -- Abstract -- Introduction -- Materials and methods -- The Continuous Plankton Recorder -- Rijkswaterstaat-RIKZ survey -- Data presentation -- Results -- Discussion -- References -- Photosynthetic responses in Phaeocystis antarctica towards varying light and iron conditions -- Abstract -- Introduction -- Methods -- Culture conditions -- Photosynthetic parameters -- Sampling strategy and statistical analyses -- Results -- Discussion -- Acknowledgements -- References -- Effects of iron concentration on pigment composition in Phaeocystis antarctica grown at low irradiance -- Abstract -- Introduction -- Methods and materials -- Isolation of Phaeocystis antarctica -- Laboratory iron-addition dose-response experiment -- Ross Sea pigment samples -- HPLC pigment analyses -- Results and discussion -- Hex:Chl a ratios -- Fuco:Chl a ratios -- Chl c3:Chl a ratios -- Hex:Chl c3 ratios -- Fuco:Hex ratios -- Physiological and ecological implications -- Acknowledgements -- References -- Evidence for high iron requirements of colonial Phaeocystis antarctica at low irradiance -- Abstract -- Introduction -- Methods -- Field collections -- Shipboard iron-light manipulation experiment -- Laboratory dose-response iron-addition experiment -- Analytical methods -- Interpretation of experimental results -- Results and discussion -- Shipboard iron-light manipulation experiment -- Laboratory dose-response iron-addition experiment -- Conclusions and directions for future research -- Acknowledgements -- References -- The carbohydrates of Phaeocystis and their degradation in the microbial food web -- Abstract -- Introduction -- Phaeocystis carbohydrates and their characteristics -- Structural polysaccharides. , Mono- and oligosaccharides -- Storage glucan -- Mucopolysaccharides -- Contribution of mucopolysaccharides-C to POC -- Extra-colonial DOM -- Mechanisms of DOM release during a Phaeocystis bloom -- Formation of hydrogels by Phaeocystis carbohydrates -- Microbial degradation -- Microbial degradation of Phaeocystis carbohydrates -- Microbial degradation of hydrogels -- Conclusions -- Acknowledgements -- References -- The role of iron in the bacterial degradation of organic matter derived from Phaeocystis antarctica -- Abstract -- Introduction -- Materials and methods -- Experimental procedure -- Phaeocystis cultures -- Bacteria cultures -- Regrowth experiments -- Analytical procedures -- Nutrients -- Chlorophyll a and Phaeocystis antarctica biomass -- Organic carbon -- Bacterial biomass and activities -- Statistical analysis -- Results -- Characteristics of LFe and HFe Phaeocystis cultures -- Bacterial regrowth experiments -- Time evolution of organic carbon -- Bacterial communities -- Bacterial activities -- Discussion -- Fe control on P. antarctica-derived organic matter concentration and quality -- Fe control on the bacterial community composition and activities -- Fe control on organic matter remineralization in a Phaeocystis-dominated ecosystem -- Conclusion -- Acknowledgments -- References -- The colonization of two Phaeocystis species (Prymnesiophyceae) by pennate diatoms and other protists: a signiWcant contribution to colony biomass -- Abstract -- Introduction -- Material and methods -- Results -- Discussion -- References -- Zooplankton grazing on Phaeocystis: a quantitative review and future challenges -- Abstract -- Introduction -- Grazing on Phaeocystis: quantitative patterns in published data -- Crustacean zooplankton grazing on Phaeocystis: is there a general pattern? -- Treatment of literature data -- Statistical methods. , Results from statistical analysis -- Quantitative results from data on crustacean grazing -- Grazing by protozooplankton and other microzooplankton -- Cell-type and life-stage-speciWc interactions with grazers -- Colony formation and its potential role in morphological defense -- Chemical defense -- Does DMS aVect grazing on Phaeocystis? -- Does nutritional value aVect grazing on Phaeocystis? -- Survival of gut passage? -- Conclusions and future challenges -- References -- The influence of Phaeocystis globosa on microscale spatial patterns of chlorophyll a and bulk-phase seawater viscosity -- Abstract -- Introduction -- Materials and methods -- Study site -- Microscale sampling device -- Chlorophyll a analysis -- Bulk-phase seawater viscosity measurements -- Potential biases and limitations -- Data analyses -- Identifying spatial structure -- Statistical analyses -- Results -- Environmental conditions -- Microscale spatial variability -- Microscale spatial correlation -- Microscale spatial structure -- Discussion -- Microscale spatial patterns and Phaeocystis globosa bloom dynamics -- Type of spatial patterns and patch sizes -- Small-scale versus microscale variability -- On the potential role of biologically increased seawater viscosity in P. globosa ecology -- Conclusions -- Acknowledgements -- References -- Haemolytic activity of live Phaeocystis pouchetii during mesocosm blooms -- Abstract -- Introduction -- Material and methods -- Mesocosm set up -- Sampling -- Phytoplankton analysis -- Erythrocyte lysis analysis (ELA) -- Data analysis -- Results -- Bloom description -- Haemolytic activity -- Correlation of haemolysis with phytoplankton groups -- Dose response curves at diVerent temperatures -- Light eVects -- Discussion -- References -- Phaeocystis and its interaction with viruses -- Abstract -- Introduction. , Isolation and characterization of viruses infecting Phaeocystis -- Occurrence and dynamics of Phaeocystis viruses -- Diversity of Phaeocystis viruses and its ecological role -- Resistance to viral infection -- Environmental factors inXuencing virus-host interactions -- Virally induced mortality of Phaeocystis -- Impact of viral lysis of Phaeocystis on the microbial food web and element cycling -- Future perspectives -- References -- Does Phaeocystis spp. contribute significantly to vertical export of organic carbon? -- Abstract -- Introduction -- Methods -- Sampling sites and sediment trap measurements -- Analysis and calculations -- Results and discussion -- How to define vertical export of Phaeocystis-derived matter? -- The morphological challenge: cells and colonies -- The relative importance of Phaeocystis spp. cell carbon to vertical POC export -- Does mucus contribute significantly to the vertical export of Phaeocystis spp-derived C? -- Mucus carbon estimates -- Estimated mucus contribution to carbon export -- Fate of Phaeocystis colonies visualised through TEP -- Mechanisms for vertical export -- Concluding remarks -- Acknowledgement -- References -- Vernal sedimentation trends in north Norwegian fjords: temporary anomaly in 234Th particulate fluxes related to Phaeocystis pouchetii proliferation -- Abstract -- Introduction -- Material and methods -- Study area -- Measurements -- Irreversible scavenging model of 234Th -- Results -- Hydrography, Phaeocystis and DMSP distribution in the three fjords -- Vertical distribution of 234Th -- Particulate fluxes of 234Th -- Discussion -- 234Th fluxes and trap collection efficiencies -- Impact of Phaeocystis proliferation on settling flux -- Conclusions -- Acknowledgments -- References. , Environmental constraints on the production and removal of the climatically active gas dimethylsulphide (DMS) and implications for ecosystem modelling.