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  • Copernicus Publications (EGU)  (3)
  • International Collective in Support of Fishworkers (ICSF)  (3)
  • 2020-2023  (6)
  • 1
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    Contrasting juxtaposition of two paradigms for diazotrophy in an Earth System Model of intermediate complexity (2020)
    Copernicus Publications (EGU)
    Details
    Publication Date: 2022-04-07
    Description: Nitrogen fixers, or diazotrophs, play a key role in the carbon and nitrogen cycle of the world oceans, but the controlling mechanisms are not comprehensively understood yet. The present study compares two paradigms on the ecological niche of diazotrophs in an Earth System Model (ESM). In our standard model configuration, which is representative for most of the state-of-the-art pelagic ecosystem models, diazotrophs take advantage of zooplankton featuring a lower food preference for diazotrophs than for ordinary phytoplankton. We compare this paradigm with the idea that diazotrophs are more competitive under oligotrophic conditions, characterized by low (dissolved, particulate, organic and inorganic) phosphorous availability. Both paradigms are supported by observational evidence and lead to a similar good agreement to the most recent and advanced observation-based nitrogen fixation estimate in our ESM framework. Further, we illustrate that the similarity between the two paradigms breaks in a RCP 8.5 anthropogenic emission scenario. We conclude that a more advanced understanding of the ecological niche of diazotrophs is mandatory for assessing the cycling of essential nutrients, especially under changing environmental conditions. Our results call for more in-situ measurements of cyanobacteria biomass if major controls of nitrogen fixation in the oceans are to be dissected.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Contrasting juxtaposition of two paradigms for diazotrophy in an Earth System Model of intermediate complexity (2020)
    Copernicus Publications (EGU)
    Details
    Publication Date: 2022-06-28
    Description: Nitrogen fixers, or diazotrophs, play a key role in the carbon and nitrogen cycle of the world oceans, but the controlling mechanisms are not comprehensively understood yet. The present study compares two paradigms on the ecological niche of diazotrophs in an Earth System Model (ESM). In our standard model configuration, which is representative for most of the state-of-the-art pelagic ecosystem models, diazotrophs take advantage of zooplankton featuring a lower food preference for diazotrophs than for ordinary phytoplankton. We compare this paradigm with the idea that diazotrophs are more competitive under oligotrophic conditions, characterized by low (dissolved, particulate, organic and inorganic) phosphorous availability. Both paradigms are supported by observational evidence and lead to a similar good agreement to the most recent and advanced observation-based nitrogen fixation estimate in our ESM framework. Further, we illustrate that the similarity between the two paradigms breaks in a RCP 8.5 anthropogenic emission scenario. We conclude that a more advanced understanding of the ecological niche of diazotrophs is mandatory for assessing the cycling of essential nutrients, especially under changing environmental conditions. Our results call for more in-situ measurements of cyanobacteria biomass if major controls of nitrogen fixation in the oceans are to be dissected.
    Type: Article , NonPeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - without review
  • 3
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    Samudra Report No.87, March 2022 (2022)
    International Collective in Support of Fishworkers (ICSF) | India
    Details
    Publication Date: 2022-08-12
    Description: The International Collective in Support of Fishworkers (ICSF) has just published the latest issue of SAMUDRA Report, its triannual journal on fisheries, communities and livelihoods. The current edition, SAMUDRA Report No. 87, dated March 2022, features a range of articles from Africa, Asia and Europe, with a special focus on the International Year of Artisanal Fisheries and Aquaculture (IYAFA 2022). The editorial Comment in the issue calls for collective and collaborative actions of all stakeholders to develop coherent and meaningful policies and legislation for the sector. Pointing out that IYAFA 2022 is a chance to create greater awareness about the role of small-scale fisheries in food production, and about the traditional knowledge and rich cultural diversity of fishing communities, the Comment hopes the year becomes a historic watershed for the sector and its communities. SAMUDRA Report No. 87 can be accessed at: https://www.icsf.net/samudra-report/
    Description: Published
    Description: Refereed
    Keywords: Samudra Report ; Fishing Communities ; International Year of Artisanal Fisheries and Aquaculture (IYAFA) ; Livelihoods ; Small-scale Fisheries ; Blue Economy ; Traditional Knowledge ; Marine Ecology ; Climate Change ; IPCC ; Vulnerability ; Oil Spills ; Women ; Human Rights ; Conflicts ; Fishing Gear ; CAOPA ; IYAFA 2022 ; Covid
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 64pp.
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    PAPER (OA)
  • 4
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    A case for a human rights-based approach to Indian aquaculture systems: A literature review. (2022)
    International Collective in Support of Fishworkers (ICSF) | India
    Details
    Publication Date: 2022-08-08
    Description: Aquaculture is the new sunrise sector with respect to ­fish production. Developing countries of Asia are the world leaders, with a large population dependent on the sector. Though a plethora of literature is available on aquaculture, there is a lacuna with regards to speci­fic studies on the human rights aspects of the same. This study is an effort to bring focus on this void and the facets that need to be examined if aquaculture is to become sustainable and is able to contribute towards various sustainable development goals as envisaged. As the human dependence on the sector is very high, the study emphasises the need and importance of placing a human rights-based framework at the centre stage of future growth of aquaculture in India. This will steer the development towards an environmentally sound and socially just path, a prerequisite for the sector. the objective of the study is to understand the strengths of legislation, guidelines, schemes and other government documents with regard to the defence of human rights; review and analyse the environmental and social impacts of aquaculture systems as seen in the literature review; and to suggest a set of recommendations that could help ­fill the gaps in the current systems as identi­fied by this study. The monograph will be of use to researchers, scientists, fishworker organisations, environmentalists and anyone interested in aquaculture development in India.
    Description: Published
    Description: Refereed
    Keywords: Fish Production ; Developing Countries ; Aquaculture ; Human Rights ; Sustainable Development ; SDG ; Legislation ; Environment ; Social Impact ; Aquaculture Development
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 74pp.
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    PAPER (OA)
  • 5
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    Handbook on Convention on Biological Diversity (CBD) for small-scale fishing communities (2022)
    International Collective in Support of Fishworkers (ICSF) | The Netherlands
    Details
    Publication Date: 2022-08-08
    Description: This Handbook, developed by ICSF and Crocevia, describes the components of the Convention on Biological Diversity (CBD) and provides an overview of its programmes, targets and commitments on aquatic, marine and coastal biodiversity. Using illustrative examples, the Handbook aims to help fishing communities and their supporters to understand the important links between biodiversity and human rights in small-scale fisheries. It also recommends actions for these stakeholders to negotiate a just and equitable outcome from international and national processes to put biodiversity on a path to recovery for the benefit of people and the planet. This handbook is useful for fishworker organizations, civil society organizations and others working on issues related to biodiversity conservation and sustainable use, in line with the FAO Small-Scale Fisheries Guidelines and the Sustainable Development Goals.
    Description: Published
    Description: Refereed
    Keywords: Convention on Biological Diversity (CBD) ; Biodiversity ; Small-scale Fisheries ; Fishing Communities ; Coastal Biodiversity ; Human Rights ; SDG ; Sustainable Development ; SSF Guidelines ; Sustainable Use ; Conservation ; Fishworker Organizations ; CSO
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 126pp.
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 6
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    PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model (2020)
    Copernicus Publications (EGU)
    Details
    Publication Date: 2022-03-10
    Description: Geological records show that vast proglacial lakes existed along the land terminating margins of palaeo ice sheets in Europe and North America. Proglacial lakes impact ice sheet dynamics by imposing marine-like boundary conditions at the ice margin. These lacustrine boundary conditions include changes in the ice sheet’s geometry, stress balance and frontal ablation and therefore affect the entire ice sheet’s mass balance. This interaction, however, has not been rigorously implemented in ice sheet models. In this study, the implementation of an adaptive lake boundary into the Parallel Ice Sheet Model (PISM) is described and applied to the glacial retreat of the Laurentide Ice Sheet (LIS). The results show that the presence of proglacial lakes locally enhances the ice flow. Along the continental ice margin, ice streams and ice lobes can be observed. Lacustrine terminating ice streams cause immense thinning of the ice sheet’s interior and thus play a significant role in the demise of the LIS. Due to the presence of lakes, a process similar to the marine ice sheet instability causes the collapse of the ice saddle over Hudson Bay, which blocked drainage via the Hudson Strait. In control experiments without a lake model, Hudson Bay is still glaciated at the end of the simulation. Future studies should target the development of parametrizations that better describe the glacial-lacustrine interactions.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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