GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Boca Raton :Taylor & Francis Group,
    Keywords: Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (342 pages)
    Edition: 1st ed.
    ISBN: 9781498705349
    DDC: 579.81776
    Language: English
    Note: Cover -- Title Page -- Copyright Page -- Table of Contents -- Preface -- Acknowledgements -- 1: Introduction to the Marine Algae: Overview -- 2: Importance of Seaweed in the Climate Change-Seaweed Solution -- 3: Microalgal Metabolism and their Utilisation -- 4: Microalgal Biomass Production -- 5: Advances and Constraints in Seaweed Farming as a Basal Constituent for the Environmentally Sustainable Development of Aquaculture in Chile -- 6: Microalgal Downstream Processing: Harvesting, Drying, Extraction, Separation, and Purification -- 7: Marine Algal Bioactivities -- 8: Macroalgal Phycocolloids -- 9: Microalgae for Feed -- 10: Potential Use of Extracts of Seaweeds Against Plant Pathogens -- 11: The Cosmeceutical Properties of Compounds Derived from Marine Algae -- 12: Dinoflagellates and Toxin Production -- 13: Integrated Multitrophic Aquaculture: An Overview -- 14: Alternative Green Biofuel from Microalgae: A Promising Renewable Resource -- 15: Genetic Engineering Approaches for the Exploitation of Marine Algae as Potential Sources of Organic and Inorganic Biofuels -- 16: Present and Future Economic and Environmental Impacts of Microalgal Technology -- Index -- About the Editors.
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1573-5117
    Keywords: agar ; agarophyte ; Gelidium ; phosphate ; Rhodophyta ; seaweed
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phosphate concentration of the growth medium was found to affect the growth rate and agar yield of a clone of Gelidium robustum grown in the laboratory. To study differences in growth we used phosphate concentrations from 0 to 200 µM. To determine the effect of phosphate on agar yield and its properties we used concentrations from 0 to 20 µM. Growth rates generally increased with increasing phosphate concentration, with the highest growth rate (21% d−1) obtained at 150 µM. Agar yield as percentage of fresh weight was highest (10%) in the algae grown with low phosphate concentrations, but agar yield as percentage of dry weight was highest(43%) at 20 µM of phosphate. Gel strength increased with phosphate concentration with a maximum of 160 g m−2 for 0.75% gels for the cultures at 20 µM. Melting and gelling temperatures of the gels were also affected by phosphate concentration of the growth medium. Starch yield was highest in algae grown in low phosphate concentrations.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1573-5117
    Keywords: agar ; cultivation ; Gelidium pulchellum ; light ; molecular weight ; Rhodophyta ; sulphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Investigation of light conditions suitable for cultivation of Gelidium pulchellum (Turner) Kurtz was performed under controlled laboratory conditions at 20 °C and in the range of irradiance of 10–430 μmol photons m−2 s−1. Growth, measured as fresh weight increment, increased with irradiance up to 130 μmol m−2 s−1 and no significant photoinhibition was observed up to 430 μmol m−2 s−1. Maximum growth rate (10.0% day−1) was obtained at 130–240 μmol m−2 s−1 under continuous light and aeration. The effect of irradiance on agar yield and quality was assessed. Agar yield varied from 31 to 38.6% of the algal dry weight, and variation was not related to irradiance. However, the yield of agar molecules soluble at 95 °C increased with increasing irradiance. A similar trend was found for sulphate content in both series o f extracts, at 95 and 121 °C. On the contrary, the molecular weight and the degree of methylation of agar molecules in the 95 °C extracts decreased with increasing light intensity. As a consequence of the variations in sulphate content, molecular weight and molecular weight distribution, the gel strength was considerably lower at high light intensity. Starch content varied from 0.9 to 7.7% of the algal dry weight, and apparently was not related with irradiance.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2015-06-16
    Description: The relationship between biodiversity and stability of marine benthic assemblages was investigated through meta-analyses using existing data sets (n = 28) covering various spatial (m-km) and temporal (1973-2006; ranging from 5 to 〉250 months) scales in different benthic habitats (emergent rock, rock pools and sedimentary habitats) over different European marine systems (North Atlantic and western Mediterranean). Stability was measured by a lower variability in time, and variability was estimated as temporal variance of species richness, total abundance (density or % cover) and community structure (using Bray-Curtis dissimilarities on species composition and abundance). Stability generally decreased with species richness. Temporal variability in species richness increased with the number of species at both quadrat (〈1 m2) and site (100 m2) scales, while no relationship was observed by multivariate analyses. Positive relationships were also observed at the scale of site between temporal variability in species richness and variability in community structure with evenness estimates. This implies that the relationship between species richness or evenness and species richness variability is slightly positive and depends on the scale of observation. Thus, species richness does not stabilize temporal fluctuations in species number, rather species rich assemblages are those most likely to undergo the largest fluctuations in species numbers and abundance from time to time. Changes within community assemblages in terms of structure are, however, generally independent of biodiversity. Except for sedimentary and rock pool habitats, no relationship was observed between temporal variation of total abundances and diversity at either scale. Overall, our results emphasise that the relation between species richness and species-level measures of temporal variability depend on scale of measurements, type of habitats and the marine system (North Atlantic and Mediterranean) considered.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2021-01-26
    Description: The diversity of life in the sea is critical to the health of ocean ecosystems that support living resources and therefore essential to the economic, nutritional, recreational, and health needs of billions of people. Yet there is evidence that the biodiversity of many marine habitats is being altered in response to a changing climate and human activity. Understanding this change, and forecasting where changes are likely to occur, requires monitoring of organism diversity, distribution, abundance, and health. It requires a minimum of measurements including productivity and ecosystem function, species composition, allelic diversity, and genetic expression. These observations need to be complemented with metrics of environmental change and socio-economic drivers. However, existing global ocean observing infrastructure and programs often do not explicitly consider observations of marine biodiversity and associated processes. Much effort has focused on physical, chemical and some biogeochemical measurements. Broad partnerships, shared approaches, and best practices are now being organized to implement an integrated observing system that serves information to resource managers and decision-makers, scientists and educators, from local to global scales. This integrated observing system of ocean life is now possible due to recent developments among satellite, airborne, and in situ sensors in conjunction with increases in information system capability and capacity, along with an improved understanding of marine processes represented in new physical, biogeochemical, and biological models.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2020-02-12
    Description: Whilst the AtlantOS project is directed towards bringing together the existing, but currently disparate observing programmes in the Atlantic Ocean, there are still some gaps in terms of requirements for addressing the collection and curation of data around the Essential Ocean Variables. This deliverable will identify gaps and emerging observing networks. Here we use the term emerging network to classify science areas that are starting to gain importance with respect to EOV’s and their measurement and curation, or are existing small scale programmes or communities that might become more important in the future if we can find means of enhancing the collaboration among investigators/groups, increasing resources to the area or using new technological developments. In the AtlantOS project we have identified a number of areas in which there are gaps in our knowledge and where opportunities exist to enhance current small-scale networks. The scope of this document is to assess these networks, based on where we are now and where the networks could be in three and ten years’ time, respectively. An assessment of the state of the existing networks is useful to identify the level of international organisation and potential for further development in the future. We identify opportunities where synergies are possible with more established global projects, and where small levels of investment in resource and time for governance and coordination can productively and realistically develop the networks. We also identify if there are ways to develop coordinated approaches to metrology technology development. For this analysis, the networks have been allocated to one of the three groups outlined below.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Miscellaneous , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
  • 8
    Publication Date: 2023-10-21
    Description: European coasts face multiple, interacting and cumulative pressures including those resulting from increasing greenhouse gas emissions (e.g. sea-level rise, Ocean warming, Ocean acidification, extreme events) and localised activities such as fishing, aquaculture, waste disposal and coastal urbanisation. These create a unique set of context-specific issues that need to be addressed holistically using a systems approach, considering the dynamics between both coastal societies and ecosystems as part of interconnected social-ecological systems. EMB Position Paper No. 27 ‘Building Coastal Resilience in Europe’ presents key policy and scientific recommendations on how to build coastal resilience and enhance capacity to cope with impacts from climate change and other coastal pressures.
    Description: Published
    Description: Refereed
    Keywords: Greenhouse gas ; Climate change effects ; Coastal resilience
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 128pp.
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2017-12-21
    Description: Within the COST action EMBOS (European Marine Biodiversity Observatory System) the degree and variation of the diversity and densities of soft-bottom communities from the lower intertidal or the shallow subtidal was measured at 28 marine sites along the European coastline (Baltic, Atlantic, Mediterranean) using jointly agreed and harmonized protocols, tools and indicators. The hypothesis tested was that the diversity for all taxonomic groups would decrease with increasing latitude. The EMBOS system delivered accurate and comparable data on the diversity and densities of the soft sediment macrozoobenthic community over a large-scale gradient along the European coastline. In contrast to general biogeographic theory, species diversity showed no linear relationship with latitude, yet a bell-shaped relation was found. The diversity and densities of benthos were mostly positively correlated with environmental factors such as temperature, salinity, mud and organic matter content in sediment, or wave height, and related with location characteristics such as system type (lagoons, estuaries, open coast) or stratum (intertidal, subtidal). For some relationships, a maximum (e.g. temperature from 15–20°C; mud content of sediment around 40%) or bimodal curve (e.g. salinity) was found. In lagoons the densities were twice higher than in other locations, and at open coasts the diversity was much lower than in other locations. We conclude that latitudinal trends and regional differences in diversity and densities are strongly influenced by, i.e. merely the result of, particular sets and ranges of environmental factors and location characteristics specific to certain areas, such as the Baltic, with typical salinity clines (favouring insects) and the Mediterranean, with higher temperatures (favouring crustaceans). Therefore, eventual trends with latitude are primarily indirect and so can be overcome by local variation of environmental factors.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2019-05-28
    Description: Assessment of networks and gap analysis that highlights opportunities for development over three and ten year timescales
    Type: Report , NonPeerReviewed , info:eu-repo/semantics/book
    Format: text
    Format: text
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...