Africa moves towards the blue economy through ecosystem-based assessment and management practices in African Large Marine Ecosystems

2020 ◽  
Vol 36 ◽  
pp. 100575
Author(s):  
Josefa Leonel Correia Sacko
Keyword(s):  
Management Practices ◽  
Marine Ecosystems ◽  
Large Marine Ecosystems ◽  
Blue Economy

scholarly journals The application of satellite remote sensing for assessing productivity in relation to fisheries yields of the world's large marine ecosystems

2011 ◽  
Vol 68 (4) ◽  
pp. 667-676 ◽  
Author(s):  
Kenneth Sherman ◽  
John O'Reilly ◽  
Igor M. Belkin ◽  
Christopher Melrose ◽  
Kevin D. Friedland
Keyword(s):  
Remote Sensing ◽  
Satellite Remote Sensing ◽  
Management Practices ◽  
The United States ◽  
Marine Ecosystems ◽  
Global Networks ◽  
Large Marine Ecosystems ◽  
Goods And Services ◽  
Current Period ◽  
Biomass Yields

Abstract Sherman, K., O'Reilly, J., Belkin, I. M., Melrose, C., and Friedland, K. D. 2011. The application of satellite remote sensing for assessing productivity in relation to fisheries yields of the world's large marine ecosystems. – ICES Journal of Marine Science, 68: 667–676. In 1992, world leaders at the historical UN Conference on Environment and Development (UNCED) recognized that the exploitation of resources in coastal oceans was becoming increasingly unsustainable, resulting in an international effort to assess, recover, and manage goods and services of large marine ecosystems (LMEs). More than $3 billion in support to 110 economically developing nations have been dedicated to operationalizing a five-module approach supporting LME assessment and management practices. An important component of this effort focuses on the effects of climate change on fisheries biomass yields of LMEs, using satellite remote sensing and in situ sampling of key indicators of changing ecological conditions. Warming appears to be reducing primary productivity in the lower latitudes, where stratification of the water column has intensified. Fishery biomass yields in the Subpolar LMEs of the Northeast Atlantic are also increasing as zooplankton levels increase with warming. During the current period of climate warming, it is especially important for space agency programmes in Asia, Europe, and the United States to continue to provide satellite-borne radiometry data to the global networks of LME assessment scientists.

scholarly journals Primary production ultimately limits fisheries economic performance

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anthony R. Marshak ◽  
Jason S. Link
Keyword(s):  
Primary Production ◽  
Economic Performance ◽  
Sustainable Management ◽  
Management Practices ◽  
Marine Ecosystems ◽  
Economic Consequences ◽  
Marine Resources ◽  
Total Biomass ◽  
System Productivity ◽  
Large Marine Ecosystems

AbstractLiving marine resources (LMRs) contribute considerably to marine economies. Oceans continue to respond to the effects of global change, with environmental factors anticipated to impact future seafood production and its associated economic performance. Here we document novel relationships between primary productivity and LMR-based economics for US regional marine ecosystems and 64 international large marine ecosystems (LMEs). Intermediate relationships between production, total biomass, fisheries landings, revenue, and LMR-based employment are also elucidated. We found that all these factors were dependent on the amount of basal production in a given system. In addition, factors including human population, exploitation history, and governance interventions significantly influenced these relationships. As system productivity plays a foundational role in determining fisheries-based economics throughout global LMEs, greater accounting for these relationships has significant implications for global seafood sustainability and food security. Quantifying the direct link between primary production and fisheries economic performance serves to better inform ecosystem overfishing thresholds and their economic consequences. Further recognition and understanding of these relationships is key to ensuring that these connections are accounted for more effectively in sustainable management practices.

Fronts in Large Marine Ecosystems

2009 ◽  
Vol 81 (1-4) ◽  
pp. 223-236 ◽  
Author(s):  
Igor M. Belkin ◽  
Peter C. Cornillon ◽  
Kenneth Sherman
Keyword(s):  
Marine Ecosystems ◽  
Large Marine Ecosystems

Trends in phytoplankton communities within large marine ecosystems diverge from the global ocean

2021 ◽  
pp. 1-12
Author(s):  
Kevin D. Friedland ◽  
John R. Moisan ◽  
Aurore A. Maureaud ◽  
Damian C. Brady ◽  
Andrew J. Davies ◽  
...  
Keyword(s):  
Chlorophyll Concentration ◽  
World Ocean ◽  
Marine Ecosystems ◽  
Fishing Effort ◽  
Global Ocean ◽  
Human Populations ◽  
Anthropogenic Pressures ◽  
Large Marine Ecosystems ◽  
Phytoplankton Communities ◽  
The World

Large marine ecosystems (LMEs) are highly productive regions of the world ocean under anthropogenic pressures; we analyzed trends in sea surface temperature (SST), cloud fraction (CF), and chlorophyll concentration (CHL) over the period 1998–2019. Trends in these parameters within LMEs diverged from the world ocean. SST and CF inside LMEs increased at greater rates inside LMEs, whereas CHL decreased at a greater rates. CHL declined in 86% of all LMEs and of those trends, 70% were statistically significant. Complementary analyses suggest phytoplankton functional types within LMEs have also diverged from those characteristic of the world ocean, most notably, the contribution of diatoms and dinoflagellates, which have declined within LMEs. LMEs appear to be warming rapidly and receiving less solar radiation than the world ocean, which may be contributing to changes at the base of the food chain. Despite increased fishing effort, fishery yields in LMEs have not increased, pointing to limitations related to productivity. These changes raise concerns over the stability of these ecosystems and their continued ability to support services to human populations.

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