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Browsing by Author "Smith, Marie E"

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Aquaculture and fisheries decision support tool

Author: Smith, Marie E ; Vhengani, Lufuno M Date: May 2023 This presentation speaks to the challenges with environmental threats such as Harmful Algal Blooms (HABs) and ocean heatwaves that have the potential to negatively affect natural and farmed marine resources. Also, monitoring these events ... Read more
The assessment of optimal MERIS ocean colour products in the shelf waters of the KwaZulu-Natal Bight, South Africa

Author: Smith, Marie E ; Bernard, Stewart ; O'Donoghue, S Date: Oct 2013 The KwaZulu-Natal Bight is a highly variable bio-optical environment, where waters over the shelf can change from the oligotrophic case 1 conditions of the Agulhas Current to the case 2 inshore environment influenced by upwelling and riverine ... Read more
ASTRAL pool of technologies: Digital twins to support IMTA within the Atlantic area

Author: Pias, M ; Orazi, G ; Drews, P ; Paris, M ; Dupont, C ; Smith, Marie E ; Michalek, K ; Lain, L ; Martinez, J ; Khelifi, I Date: Sep 2022 Presentation on the ASTRAL pool of technologies: Digital twins to support IMTA within the Atlantic area. Read more
Bio-optical and biogeochemical parameterization of IOP-traceable, hyperspectral Rrs datasets for transitional water applications

Author: Lain, Lisl ; Kravitz, J ; Smith, Marie E Date: Nov 2023 The diversity of phytoplankton communities and the robustness of ecosystem stability over annual and interannual time scales is not well characterized in South Africa. Extensive optical & biogeochemical field measurements are being collected ... Read more
Devastating farmed abalone mortalities attributed to yessotoxin-producing dinoflagellates

Author: Pitcher, GC ; Foord, CJ ; Macey, BM ; Mansfield, L ; Mouton, A ; Smith, Marie E ; Osmond, SJ ; Van der Molen, L Date: Jan 2019 A large dinoflagellate bloom in Walker Bay (South Africa) in January 2017 impacted 3 land-based abalone farms resulting in the death of several million animals. Satellite-derived images of Chl-a from the Ocean and Land Colour Imager (OLCI) ... Read more
Evaluation of chlorophyll-a and POC MODIS aqua products in the Southern Ocean

Author: Moutier, William ; Thomalla, Sandy J ; Bernard, Stewart ; Wind, G ; Ryan-Keogh, Thomas J ; Smith, Marie E Date: Jul 2019 The Southern Ocean (SO) is highly sensitive to climate change. Therefore, an accurate estimate of phytoplankton biomass is key to being able to predict the climate trajectory of the 21st century. In this study, MODerate resolution Imaging ... Read more
Fisheries Support through OCIMS and MarCOSIO projects

Author: Smith, Marie E Date: Oct 2022 Presentation on the environmental overview, Earth Observation Product Development and National and regional initiatives supporting fisheries-National Oceans and Coastal Information Management System (OCIMS)-Marine and Coastal Operations for ... Read more
The future of aquaculture is now

Author: Lain, Elisabeth J ; Smith, Marie E Date: Nov 2021 Aquaculture in South Africa is really taking off, with around 230 farms countrywide, cultivating a wide variety of fish and shellfish species. Most of these are freshwater farms, and it is the freshwater sector that is indeed growing the ... Read more
Gone West; first observations of surf-zone diatom Anaulus australis accumulations on the West Coast

Author: Lamberth, SJ ; Bornman, TG ; Kerwath, SE ; Kock, A ; Mansfield, L ; Parker, D ; Rothman, M ; Samaai, T ; Smith, Marie E Date: Jun 2022 Surf-zone diatom Anaulus australis accumulations, recognised by brown discoloured water, are typical of long dissipative beaches on South Africa’s south and east coasts, notably those with a nutrient supply from adjacent dune-field aquifers. ... Read more
HAB detection within aquaculture industry: A case study in the Atlantic Area

Author: Guterres, B ; Sbrissa, K ; Mendes, A ; Meireles, L ; Novoveska, L ; Vermeulen, F ; Martinez, J ; Garcia, A ; Lain, Elisabeth J ; Smith, Marie E Date: Jul 2023 Fisheries and aquaculture industries notably contribute to animal-source protein production worldwide. Climate change is creating environmental conditions suitable for harmful algal blooms (HAB) on a global scale. Some phytoplankton species ... Read more
Harmful algal blooms and satellite earth observation

Author: Smith, Marie E Date: Jul 2022 The southern Benguela is divided into the West Coast and the South-West Coast regions owing to a change in coastline orientation at Cape Point. These biogeographic regions are reflected in both the make-up and frequency of phytoplankton blooms. ... Read more
In living colour – South African aquatic scientists make a splash in biodiversity campaign

Author: Lain, Elisabeth J ; Smith, Marie E Date: Jan 2024 A new age of satellite remote sensing is upon us. High-tech sensors capable of imaging the earth at over 100 spectral wavebands are now a reality. These sensors, known as hyperspectral radiometers, capture very fine spectral features of the ... Read more
The Marine and Coastal Operations for southern Africa and the Indian Ocean: Western Indian Ocean Coral Bleaching Monitoring Service

Author: Smith, Marie E ; Mbugua, J Date: Oct 2022 The Marine and Coastal Operations for southern Africa and the Indian Ocean: Western Indian Ocean Coral Bleaching Monitoring Service Read more
A new model-based coastal retention index (CORE) identifies bays as hotspots of retention, biological production and cumulative anthropogenic pressures

Author: Pfaff, MC ; Hart-Davis, M M ; Smith, Marie E ; Veitch, J Date: Aug 2022 Retention is a key driver of biological productivity near the coast since increased concentrations of planktonic particles in retention hotspots boost local primary production, availability of particulate food and larval recruitment. Known ... Read more
The not-so-easy task of taking heavy-lift ML models to the edge: A performance-watt perspective

Author: Pereira, LC ; Guterres, B ; Sbrissa, K ; Mendes, A ; Vermeulen, F ; Lain, Elisabeth J ; Smith, Marie E ; Martinez, J ; Drews, P ; Duarte, N Date: Mar 2023 Edge computing is a new development paradigm that brings computational power to the network edge through novel intelligent end-user services. It allows latency-sensitive applications to be placed where the data is created, thus reducing ... Read more
Ocean colour and detecting phytoplankton biomass and community dynamics

Author: Robertson, Lain, L ; Bernard, S ; Smith, Marie E Date: Jan 2021 Harmful algal blooms (HABs) occur in virtually all coastal regions of the world as well as many lakes, and are typically associated with a rapid proliferation of phytoplankton cells, but even low cell numbers of high toxic species may cause ... Read more
The oceans and coastal information management system aquaculture decision support tool

Author: Smith, Marie E Date: Nov 2022 Relatively young industry with potential for growth. Together, the Aquaculture and Fisheries sector could contribute approximately R10-15 Billion to SA’s GDP. Read more
An optimized Chlorophyll a switching algorithm for MERIS and OLCI in phytoplankton-dominated waters

Author: Smith, Marie E ; Robertson, lain L ; Bernard, Stewart Date: Jun 2018 Productive upwelling zones such as the southern Benguela can exhibit phytoplankton biomass variability over several orders of magnitude, from near oligotrophic offshore waters to hypertrophic inshore blooms of>100 mgm (sup-3). This introduces ... Read more
Remote sensing for aquaculture support in the Western Indian Ocean

Author: Smith, Marie E ; Vhengani, L Date: Oct 2023 Presentation on the remote sensing for aquaculture support in the western Indian Ocean. Read more
Remote sensing of phytoplankton community composition in the northern Benguela upwelling system

Author: Moloto, Tebatso M ; Thomalla, Sandy J ; Smith, Marie E ; Martin, B ; Louw, DC ; Koppelmann, R Date: Sep 2023 Marine phytoplankton in the northern Benguela upwelling system (nBUS) serve as a food and energy source fuelling marine food webs at higher trophic levels and thereby support a lucrative fisheries industry that sustain local economies in ... Read more

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