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  • 2010-2014  (31)
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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Marine biology. ; Electronic books.
    Description / Table of Contents: This book covers all aspects of seaweed: acclimation in the abiotic environment, biotic interactions in seaweed communities, structure and function of seaweed systems, environmental changes and seaweed aquaculture. Includes industrial and economic aspects.
    Type of Medium: Online Resource
    Pages: 1 online resource (507 pages)
    Edition: 1st ed.
    ISBN: 9783642284519
    Series Statement: Ecological Studies ; v.219
    DDC: 579.88
    Language: English
    Note: Intro -- Seaweed Biology -- Novel Insights into Ecophysiology, Ecology and Utilization -- Preface -- Contents -- Part I: Fundamental Processes and Acclimation to Abiotic Environmental Variables -- Chapter 1: Physiological and Photomorphogenic Effects of Light on Marine Macrophytes -- 1.1 Introduction -- 1.2 Photosynthesis Under Limiting Light Conditions -- 1.3 Photosynthesis Under Excessive Light Conditions -- 1.4 Effect of Ultraviolet Radiation on Zonation of Macroalgae -- 1.5 Light Absorption and Light Spectrum -- 1.6 Light as an Environmental Signal -- 1.7 Conclusive Remarks -- References -- Chapter 2: Morpho-functionality of Carbon Metabolism in Seaweeds -- 2.1 Introduction -- 2.2 Inorganic Carbon Acquisition -- 2.3 Photosynthetic Carbon Fixation -- 2.3.1 Calvin-Benson Cycle and RUBISCO -- 2.3.2 Rates of Carbon Fixation -- 2.3.3 Photorespiration -- 2.4 Light-Independent Carbon Fixation -- 2.5 Morpho-functional Aspects of Carbon Metabolism -- 2.5.1 The Role of Storage Carbohydrates -- 2.5.2 Thallus Anatomy and Long-Distance Transport of Photoassimilates -- 2.5.3 Patterns of Carbon Allocation -- 2.5.4 Concluding Remarks -- References -- Chapter 3: Seaweed Responses to Temperature -- 3.1 Introduction -- 3.2 Local Temperature Adaptation of Growth and Photosynthesis -- 3.3 Phenotypic Temperature Acclimation of Growth and Photosynthesis -- 3.4 Disruptive Temperature Stress and Thermal Tolerance -- 3.5 Temperature Control of Biogeographical Distribution Boundaries -- 3.6 Conclusion -- References -- Chapter 4: Environment and Algal Nutrition -- 4.1 Introduction -- 4.2 Meeting Nutritional Needs -- 4.2.1 Extracting Nutrients from their Environment -- 4.2.2 Neutral vs. Ionic Nutrients -- 4.2.3 N vs. P Limitation -- 4.2.4 Considering C as Just Another Nutrient -- 4.3 Uncoupling Uptake and Incorporation -- 4.4 Different Ways of N Utilization. , 4.4.1 Seaweed Diversity Linked to Nutrient Source -- 4.4.2 Slow-Growing vs. Fast-Growing Species -- 4.5 Use of Isotope Discrimination -- 4.6 Aquaculture -- 4.6.1 Nutrient Uptake at High Concentrations -- 4.7 Conclusions -- References -- Chapter 5: Seaweed Acclimation to Salinity and Desiccation Stress -- 5.1 Variability of Salinity in Seaweed Habitats -- 5.2 Effects of Salinity Stress and Desiccation on the Physiology of Seaweeds -- 5.2.1 Rate of Survival -- 5.2.2 Growth -- 5.2.3 Photosynthesis and Respiration -- 5.3 Processes of Osmotic Acclimation -- 5.3.1 Inorganic Ions -- 5.3.2 Organic Osmolytes -- 5.3.3 Biosynthesis of Organic Osmolytes -- 5.3.4 Antioxidants -- 5.3.5 Ultrastructural Changes -- 5.3.6 Self Protection -- 5.4 Salinity Ecotypes -- 5.5 Outlook -- References -- Chapter 6: Seaweed Responses to Environmental Stress: Reactive Oxygen and Antioxidative Strategies -- 6.1 Introduction -- 6.2 Stress-Induced ROS Production and Its Effects on Seaweed Performance -- 6.2.1 Seaweed Exposure to Heavy Metal Stress and Reactive Oxygen Metabolism -- 6.2.2 A Peculiar Antioxidant System in Kelp -- 6.3 Antioxidative Strategies in Seaweeds on Seasonal and Spatial Scales -- 6.3.1 SOD Activity in the Brown Seaweed Desmarestia anceps Along a Depth Gradient: A Case Study in Antarctica -- 6.3.2 Seasonal Changes in SOD Activity in Seaweeds from an Arctic Fjord -- 6.4 Oxidative Bursts: Reactive Oxygen and Interspecific Interaction -- 6.5 Summary -- References -- Part II: Biotic Interactions -- Chapter 7: Competition, a Major Factor Structuring Seaweed Communities -- 7.1 Competition Theory -- 7.2 Competition Among Marine Macroalgae -- 7.2.1 Overview -- 7.2.2 Competition for Light -- 7.2.3 Competition for Space -- 7.2.4 Competition for Nutrients -- 7.3 Competition in Complex Environments -- 7.3.1 Synergistic Effects of Different Factors. , 7.3.2 The Importance of Competition in Maintaining Marine Forests -- 7.3.3 Competition in the Face of Climate Change -- 7.4 Concluding Remarks -- References -- Chapter 8: Grazers on Benthic Seaweeds -- 8.1 Common Classification Systems of Grazers -- 8.2 Digestive Adaptations in Grazers -- 8.3 Grazer Impacts on Seaweeds and Seaweed Communities -- 8.4 Seaweed Defenses Against Grazing -- 8.5 Effects of Seaweed Chemical Defenses on Herbivores and Communities -- 8.6 Climate Change Effects on Seaweed-Herbivore Interactions -- 8.7 Conclusions -- References -- Chapter 9: Chemical Ecology of Seaweeds -- 9.1 Overview -- 9.2 Sensory Chemical Ecology -- 9.2.1 Chemical Communication -- 9.2.2 Environmental Sensing -- 9.3 Chemical Defense -- 9.3.1 Defenses Against Predation -- 9.3.2 Defenses Against Pathogens -- 9.3.3 Defenses Against Biofouling -- 9.3.4 Allelopathy -- 9.4 Outlook -- References -- Chapter 10: Bacterial Communities on Macroalgae -- 10.1 Introduction -- 10.2 Microbial Communities Associated with Macroalgae -- 10.3 Host-Specific Microbial Communities on Macroalgae? -- 10.4 A Model of Surface Colonization on Macroalgae -- 10.5 Conclusions -- References -- Chapter 11: Intimate Associations Between Epiphytes, Endophytes, and Parasites of Seaweeds -- 11.1 Introduction -- 11.2 Ecology and Biology of Close Biotic Interactions of Seaweeds -- 11.2.1 Epiphytes -- 11.2.2 Pigmented Endophytes -- 11.2.2.1 Endophytes in Red Algae -- 11.2.2.2 Endophytes in Brown Algae -- 11.2.2.3 Endophytes in Green Algae -- 11.2.2.4 Life History Stages of Seaweeds as Endophytic Filaments in Other Taxa -- Kelp Gametophytes in Red Filamentous Algae -- Green Algal Endophytes as Alternate Life History Phases of Acrosiphonia Species -- 11.2.3 Eukaryotic Parasites and Pathogens -- 11.2.3.1 Adelphoparasites and Alloparasites of Red Algae. , 11.2.3.2 Fungal and Oomycete Parasites and/or Pathogens -- 11.3 Cross-Talk Between Host and Colonizers and Defenses Against Colonization -- 11.3.1 Cross-Talk Involved in Host Colonization -- 11.3.2 ``Ménages à trois,´´ Quorum Sensing Mediated Bacterial-Macroalgal Interactions Modulate Colonization -- 11.3.3 Allelopathic Interactions and Induced Defenses -- 11.4 Impacts of Close Associations -- 11.4.1 Community Context -- 11.4.2 Implications to Seaweed Mariculture -- 11.4.3 Fouling -- 11.5 Summary and Prospects -- References -- Chapter 12: Invasive Marine Seaweeds: Pest or Prize? -- 12.1 Introduction -- 12.2 Biological Traits of Invasive Seaweeds -- 12.2.1 Seaweed Invasions Are Mostly Human-Mediated -- 12.3 The Identification of Introduced Seaweeds Is Not Always Easy -- 12.3.1 Relevant Taxonomic Units in Seaweeds Molecular Ecology -- 12.3.2 Case Study: Sargassum Muticum -- 12.3.3 Case Study: Undaria Pinnatifida -- 12.3.4 Case Study: Asparagopsis Armata -- 12.3.5 Case Study: Asparagopsis Taxiformis -- 12.3.6 Case Study: Codium Fragile ssp. Tomentosoides -- 12.3.7 Case Study: Caulerpa spp. -- 12.3.8 Assessing Seaweed Introductions -- 12.4 Are Introduced Species a Pest or Prize? A Crab´s Tale -- 12.4.1 Commercially Used Invasive Seaweeds -- 12.4.2 Gracilaria salicornia -- 12.4.3 Eucheuma and Kappaphycus spp. -- 12.4.4 Asparagopsis Species -- 12.4.5 Caulerpa Species -- 12.4.6 Ulva Species -- 12.4.7 Undaria pinnatifida -- 12.4.8 Codium Fragile Subspecies Tomentosoides -- 12.5 Conclusions -- References -- Part III: Structure and Function of the World´s Main Seaweed Systems -- Chapter 13: Seaweeds and Their Communities in Polar Regions -- 13.1 Introduction -- 13.2 Biodiversity and Biogeographical Relationships of Antarctic and Arctic Seaweeds -- 13.3 Physiological Adaptations to the Environment -- 13.3.1 Seasonal Development and Physiological Performance. , 13.3.2 Radiation Climate and Depth Zonation -- 13.3.3 Temperature Requirements and Geographic Distribution -- 13.3.4 Effect of Salinity, Temperature, and Desiccation on Supra- and Eulittoral Seaweeds -- 13.4 Ecology of Polar Seaweed Communities -- 13.4.1 Biomass, Depth Distribution, and Productivity -- 13.4.2 Elemental and Nutritional Content -- 13.4.3 Defenses Against Herbivory and Biofouling in Polar Seaweeds -- 13.4.4 Trophic Interactions -- 13.5 Impact of Global Climate Changes on Seaweeds and Their Communities -- 13.6 Conclusion -- References -- Chapter 14: Cold-Temperate Seaweed Communities of the Southern Hemisphere -- 14.1 The Regions and Their Basic Abiotic Conditions -- 14.1.1 Southwestern South America Region -- 14.1.2 Southeastern South America Region -- 14.1.3 Victoria-Tasmania Region -- 14.1.4 Southern New Zealand Region -- 14.1.5 Sub-Antarctic Islands Region -- 14.2 Structure and Function of Seaweed Communities -- 14.2.1 Southwestern South America Region (Chile) -- 14.2.2 Southeastern South America Region (Argentinean Patagonia) -- 14.2.3 Victoria-Tasmania Region -- 14.2.4 Southern New Zealand Region -- 14.2.5 Sub-Antarctic Islands Region -- 14.3 Biogeographical Processes -- 14.3.1 Cold-Temperate Kelps as Biogeographical Models -- 14.4 Major Differences with Cold Temperate Regions of the Northern Hemisphere -- 14.5 Concluding Remarks -- References -- Chapter 15: Warm Temperate Seaweed Communities: A Case Study of Deep Water Kelp Forests from the Alboran Sea (SW Mediterranean Sea) and the Strait of Gibraltar -- 15.1 Introduction: Kelp Forests and Kelp Beds in the Alboran Sea and the Strait of Gibraltar -- 15.2 Abiotic Factors Affecting Distribution of Kelps in the Alboran Sea and the Strait of Gibraltar -- 15.2.1 Substratum -- 15.2.2 Hydrodynamics -- 15.2.3 Irradiance -- 15.2.4 Temperature -- 15.2.5 Inorganic Nutrients. , 15.3 Growth and Reproduction.
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  • 2
    Type of Medium: Book
    Pages: XIV, 514 S. in 1 Teil , 235 mm x 155 mm, 801 g
    Edition: Aufl. 2012
    ISBN: 3642442145 , 9783642442148
    Series Statement: Ecological Studies 219
    DDC: 570
    Language: English
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  • 3
    Book
    Book
    Cambridge : Cambridge University Press
    Keywords: Marine algae Ecophysiology ; Marine algae Ecophysiology ; Meeresalgen ; Autökologie
    Type of Medium: Book
    Pages: xiv, 551 Seiten , Illustrationen, Diagramme , 25 cm
    Edition: Second edition
    ISBN: 9780521145954
    DDC: 579.8177
    RVK:
    Language: English
    Note: Originally published: Seaweed ecology and physiology / Christopher S. Lobban, Paul J. Harrison. Cambridge ; New York : Cambridge University Press, 1994. - Includes bibliographical references. - Hier auch später erschienene, unveränderte Nachdrucke
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  • 4
    Publication Date: 2020-07-14
    Description: Future atmospheric CO2 levels will most likely have complex consequences for marine organisms, particulary photosynthetic calcifying organisms. Corallina officinalis L. is an erect calcifying macroalga found in the inter- and subtidal regions of temperate rocky coastlines and provides important substrate and refugia for marine meiofauna. The main goal of the current study was to determine the physiological responses of C. officinalis to increased CO2 concentrations expected to occur within the next century and beyond. Our results show that growth and production of inorganic material decreased under high CO2 levels, while carbonic anhydrase activity was stimulated and negatively correlated to algal inorganic content. Photosynthetic efficiency based on oxygen evolution was also negatively affected by increased CO2. The results of this study indicate that C. officinalis may become less competitive under future CO2 levels, which could result in structural changes in future temperate intertidal communities.
    Type: Article , PeerReviewed
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  • 5
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    Inter-Research
    In:  Marine Ecology Progress Series, 464 . pp. 89-105.
    Publication Date: 2020-07-09
    Description: Since pre-industrial times, uptake of anthropogenic CO2 by surface ocean waters has caused a documented change of 0.1 pH units. Calcifying organisms are sensitive to elevated CO2 concentrations due to their calcium carbonate skeletons. In temperate rocky intertidal environments, calcifying and noncalcifying macroalgae make up diverse benthic photoautotrophic communities. These communities may change as calcifiers and noncalcifiers respond differently to rising CO2 concentrations. In order to test this hypothesis, we conducted an 86 d mesocosm experiment to investigate the physiological and competitive responses of calcifying and noncalcifying temperate marine macroalgae to 385, 665, and 1486 mu atm CO2. We focused on comparing 2 abundant red algae in the Northeast Atlantic: Corallina officinalis (calcifying) and Chondrus crispus (noncalcifying). We found an interactive effect of CO2 concentration and exposure time on growth rates of C. officinalis, and total protein and carbohydrate concentrations in both species. Photosynthetic rates did not show a strong response. Calcification in C. officinalis showed a parabolic response, while skeletal inorganic carbon decreased with increasing CO2. Community structure changed, as Chondrus crispus cover increased in all treatments, while C. officinalis cover decreased in both elevated-CO2 treatments. Photochemical parameters of other species are also presented. Our results suggest that CO2 will alter the competitive strengths of calcifying and noncalcifying temperate benthic macroalgae, resulting in different community structures, unless these species are able to adapt at a rate similar to or faster than the current rate of increasing sea-surface CO2 concentrations.
    Type: Article , PeerReviewed
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  • 6
    Publication Date: 2014-08-29
    Description: Atmospheric carbon dioxide emissions cause a decrease in the pH and aragonite saturation state of surface ocean water. As a result, calcifying organisms are expected to suffer under future ocean conditions, but their physiological responses may depend on their nutrient status. Because many coral reefs experience high inorganic nutrient loads or seasonal changes in nutrient availability, reef organisms in localized areas will have to cope with elevated carbon dioxide and changes in inorganic nutrients. Halimeda opuntia is a dominant calcifying primary producer on coral reefs that contributes to coral reef accretion. Therefore, we investigated the carbon and nutrient balance of H. opuntia exposed to elevated carbon dioxide and inorganic nutrients. We measured tissue nitrogen, phosphorus and carbon content as well as the activity of enzymes involved in inorganic carbon uptake and nitrogen assimilation (external carbonic anhydrase and nitrate reductase, respectively). Inorganic carbon content was lower in algae exposed to high CO2, but calcification rates were not significantly affected by CO2 or inorganic nutrients. Organic carbon was positively correlated to external carbonic anhydrase activity, while inorganic carbon showed the opposite correlation. Carbon dioxide had a significant effect on tissue nitrogen and organic carbon content, while inorganic nutrients affected tissue phosphorus and N:P ratios. Nitrate reductase activity was highest in algae grown under elevated CO2 and inorganic nutrient conditions and lowest when phosphate was limiting. In general, we found that enzymatic responses were strongly influenced by nutrient availability, indicating its important role in dictating the local responses of the calcifying primary producer H. opuntia to ocean acidification.
    Type: Article , PeerReviewed
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  • 7
    Publication Date: 2020-07-24
    Description: The concentration of CO2 in global surface ocean waters is increasing due to rising atmospheric CO2 emissions, resulting in lower pH and a lower saturation state of carbonate ions. Such changes in seawater chemistry are expected to impact calcification in calcifying marine organisms. However, other physiological processes related to calcification might also be affected, including enzyme activity. In a mesocosm experiment, macroalgal communities were exposed to three CO2 concentrations (380, 665, and 1486 µatm) to determine how the activity of two enzymes related to inorganic carbon uptake and nutrient assimilation in Corallina officinalis, an abundant calcifying rhodophyte, will be affected by elevated CO2 concentrations. The activity of external carbonic anhydrase, an important enzyme functioning in macroalgal carbon-concentrating mechanisms, was inversely related to CO2 concentration after long-term exposure (12 weeks). Nitrate reductase, the enzyme responsible for reduction of nitrate to nitrite, was stimulated by CO2 and was highest in algae grown at 665 µatm CO2. Nitrate and phosphate uptake rates were inversely related to CO2, while ammonium uptake was unaffected, and the percentage of inorganic carbon in the algal skeleton decreased with increasing CO2. The results indicate that the processes of inorganic carbon and nutrient uptake and assimilation are affected by elevated CO2 due to changes in enzyme activity, which change the energy balance and physiological status of C. officinalis, therefore affecting its competitive interactions with other macroalgae. The ecological implications of the physiological changes in C. officinalis in response to elevated CO2 are discussed.
    Type: Article , PeerReviewed
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  • 8
    Publication Date: 2020-06-23
    Description: Ocean acidification reduces the concentration of carbonate ions and increases those of bicarbonate ions in seawater compared with the present oceanic conditions. This altered composition of inorganic carbon species may, by interacting with ultraviolet radiation (UVR), affect the physiology of macroalgal species. However, very little is known about how calcareous algae respond to UVR and ocean acidification. Therefore, we conducted an experiment to determine the effects of UVR and ocean acidification on the calcified rhodophyte Corallina officinalis using CO2-enriched cultures with and without UVR exposure. Low pH increased the relative electron transport rates (rETR) but decreased the CaCO3 content and had a miniscule effect on growth. However, UVA (4.25 W m-2) and a moderate level of UVB (0.5 W m-2) increased the rETR and growth rates in C. officinalis, and there was a significant interactive effect of pH and UVR on UVR-absorbing compound concentrations. Thus, at low irradiance, pH and UVR interact in a way that affects the multiple physiological responses of C. officinalis differently. In particular, changes in the skeletal content induced by low pH may affect how C. officinalis absorbs and uses light. Therefore, the light quality used in ocean acidification experiments will affect the predictions of how calcified macroalgae will respond to elevated CO2.
    Type: Article , PeerReviewed
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  • 9
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    PANGAEA
    In:  Supplement to: Yildiz, Gamse; Hofmann, Laurie C; Bischof, Kai; Dere, Sükran (2013): Ultraviolet radiation modulates the physiological responses of the calcified rhodophyte Corallina officinalis to elevated CO2. Botanica Marina, 56(2), 161-168, https://doi.org/10.1515/bot-2012-0216
    Publication Date: 2023-02-24
    Description: Ocean acidification reduces the concentration of carbonate ions and increases those of bicarbonate ions in seawater compared with the present oceanic conditions. This altered composition of inorganic carbon species may, by interacting with ultraviolet radiation (UVR), affect the physiology of macroalgal species. However, very little is known about how calcareous algae respond to UVR and ocean acidification. Therefore, we conducted an experiment to determine the effects of UVR and ocean acidification on the calcified rhodophyte Corallina officinalis using CO2-enriched cultures with and without UVR exposure. Low pH increased the relative electron transport rates (rETR) but decreased the CaCO3 content and had a miniscule effect on growth. However, UVA (4.25 W m-2) and a moderate level of UVB (0.5 W m-2) increased the rETR and growth rates in C. officinalis, and there was a significant interactive effect of pH and UVR on UVR-absorbing compound concentrations. Thus, at low irradiance, pH and UVR interact in a way that affects the multiple physiological responses of C. officinalis differently. In particular, changes in the skeletal content induced by low pH may affect how C. officinalis absorbs and uses light. Therefore, the light quality used in ocean acidification experiments will affect the predictions of how calcified macroalgae will respond to elevated CO2.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 10
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    PANGAEA
    In:  Supplement to: Hassenrück, Christiane; Hofmann, Laurie C; Bischof, Kai; Ramette, Alban (2015): Seagrass biofilm communities at a naturally CO2-rich vent. Environmental Microbiology Reports, https://doi.org/10.1111/1758-2229.12282
    Publication Date: 2023-02-24
    Description: Seagrass meadows are a crucial component of tropical marine reef ecosystems. The seagrass plants are colonized by a multitude of epiphytic organisms that contribute to determining the ecological role of seagrasses. To better understand how environmental changes like ocean acidification might affect epiphytic assemblages, the microbial community composition of the epiphytic biofilm of Enhalus acroides was investigated at a natural CO2 vent in Papua New Guinea using molecular fingerprinting and next generation sequencing of 16S and 18S rRNA genes. Both bacterial and eukaryotic epiphytes formed distinct communities at the CO2-impacted site compared to the control site. This site-related CO2 effect was also visible in the succession pattern of microbial epiphytes. We further found an increased abundance of bacterial types associated with coral diseases at the CO2-impacted site (Fusobacteria, Thalassomonas) whereas eukaryotes such as certain crustose coralline algae commonly related to healthy reefs were less diverse. These trends in the epiphytic community of E. acroides suggest a potential role of seagrasses as vectors of coral pathogens and may support previous predictions of a decrease in reef health and prevalence of diseases under future ocean acidification scenarios.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 3 datasets
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