A5049604841- Marine and coastal ecosystems
- Marine and fisheries research
- Marine Biology and Ecology Research
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Oceanographic and Atmospheric Processes
- Aquatic Invertebrate Ecology and Behavior
- Water Quality Monitoring and Analysis
- Aquaculture Nutrition and Growth
- Marine Toxins and Detection Methods
- Fish Ecology and Management Studies
- Plant and animal studies
- Cephalopods and Marine Biology
- Water Quality Monitoring Technologies
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Aquatic Ecosystems and Biodiversity
- Oil Spill Detection and Mitigation
- Ecology and biodiversity studies
- Echinoderm biology and ecology
- Reproductive biology and impacts on aquatic species
Bedford Institute of Oceanography
1996-2018
Fisheries and Oceans Canada
2014-2018
City of Cape Town
2010
Dalhousie University
1998-2009
University of Concepción
2006
University of Cape Town
1981-1992
Hamburgische Investitions- und Förderbank
1984
Plymouth Marine Laboratory
1982
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 383:73-84 (2009) - DOI: https://doi.org/10.3354/meps07998 Carbon-to-chlorophyll ratio and growth rate of phytoplankton in sea Shubha Sathyendranath1,2,*, Venetia Stuart2, Anitha Nair2, Kenji Oka3, Toru Nakane4, Heather Bouman5, Marie-Hélène Forget2, Heidi Maass6, Trevor Platt1,6 1Plymouth Laboratory, Prospect...
The habitability of our planet depends on interlocking climate and biogeochemical systems. Living organisms have played key roles in the evolution these Now man is perturbing climate/biogeochemical systems at an unprecedented pace. In particular, global carbon cycle being forced directly by changes fluxes (e.g. fossil fuel burning deforestation/reforestation), indirectly through atmospheric chemistry stratospheric ozone depletion increases green house gases). Nutrient cycles are also...
Algorithms that have been used on a routine basis for remote sensing of the phytoplankton pigment, chlorophyll- a, from ocean colour data satellite sensors such as CZCS (Coastal Zone Color Scanner), SeaWiFS (Sea Viewing Wide Field-of-View Sensor) and OCTS (Ocean Colour Temperature Scanner) are all an empirical nature. However, there exist theoretical models allow to be expressed function inherent optical properties seawater, absorption coefficient backscattering coefficient. These can in...
By using data collected during a continuous circumnavigation of the Southern Hemisphere, we observed clear patterns in population-genetic structure Prochlorococcus , most abundant photosynthetic organism on Earth, between and within three Subtropical Gyres. The same mechanisms that were previously invoked to account for vertical distribution ecotypes at local scales accounted global (horizontal) observed. Basin-scale seasonal variations strength stratification provide basis understanding...
The two‐population absorption model of Sathyendranath et al. is extended to retrieve the specific coefficients (absorption per unit concentration chlorophyll‐ a ) component populations phytoplankton. relates coefficient phytoplankton concentration, assuming that assemblages comprise mixtures two whose proportions vary as total cells changes. applied in situ data collected from six regions during 34 cruises. compares well with earlier models but brings additional advantage parameters have...
Data from three cruises (Arabesque 1 and 2 in the Arabian Sea Vancouver Island cruise) were examined to assess importance of species composition accessory pigments modifying specific absorption coefficients. The differed widely their phytoplankton assemblages with small cells dominating Arabesque cruise large diatoms cruise. Absorption spectra each decomposed into 13 Gaussian bands representing by major chlorophylls pigments. maximum peak height Pm* for band was obtained regressing heights...
Particle-size selection was studied in 3 species of suspension feeding bivalves, a n ascidian and sponge, using direct an indirect technique.All bivalve retained particles > 4 p m with 100 % efficiency, while the retention 0.6 pm cells dropped to approximately 20 %.In contrast, sponges showed highest for smallest declining efficiency larger particles, suggesting effective food resource partitioning on basis particle size between these 2 groups animals.The ascidians, however, retalned all...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 258:19-30 (2003) - doi:10.3354/meps258019 Temperature as indicator of optical properties and community structure marine phytoplankton: implications for remote sensing Heather A. Bouman1,*, Trevor Platt2, Shubha Sathyendranath3, William K. W. Li2, Venetia Stuart3, Cesar Fuentes-Yaco3, Heidi Maass2, Edward P....
A modification of the 51Cr:'4C twin-labelling technique is described in which food source labelled with 14C but 51Cr enclosed a polymeric resin membrane and presented as microspheres similar diameter to particles.This eliminates major uptake 5 1 ~r transferred ctenidia palps suspension-feeding mussel Aulacomya ater(Mo1ina) from detritus 51Cr.The results suggest that although bacterial cultures based on isolates kelp bacteria can be absorbed an efficiency 67 70 %, debris itself also...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 201:91-106 (2000) - doi:10.3354/meps201091 Bio-optical characteristics of diatom and prymnesiophyte populations in Labrador Sea V. Stuart1,2,*, S. Sathyendranath1,2, E. J. H. Head1, T. Platt1, B. Irwin1, Maass1 1Bedford Institute Oceanography, PO Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada 2Oceanography...
Three cruises were conducted during fall and spring in the Labrador Sea to investigate effects of bio‐optical properties on satellite retrievals phytoplankton chlorophyll this important high‐latitude ecosystem. Taxon‐specific regional differences found. Diatoms had ∼1.5 lower chlorophyll‐specific absorption but significantly higher reflectance ratios than prymnesiophytes. Particulate at 443 nm for total, phytoplankton, “detrital” fractions was related chlorophyll, values reported latitudes....
Abstract Vertebrates have a universal requirement for essential fatty acids (FAs), but in the ocean these FAs are synthesized only by phytoplankton. All other marine organisms must source their FA directly from phytoplankton or indirectly through food web. Thus, growth and abundance of all ecosystem is constrained not just rate carbon fixation photosynthesis also synthesis FAs. Despite significance this controlling step, we had until now very limited knowledge amount, distribution sea. Here,...
The microbial community which colonises particulate debris from the kelp Laminaria pallida shows a succession bacteria, through flagellates, ciliates, amoebae and choanoflagellates over period of up to 34 d incubation at 10 "C.The biomass bacteria reaches only 16.5 mg g-' added organic matter compared with 42 dry weight dissolved mucilage, despite fact that combined grazing protozoans in both cases was 4.2-4.6 matter.This suggests components comprising principally acyclic polyol D-mannitol...
This research aims to map the publications of dissertations and theses on interdisciplinarity in Degree Countryside Education (LEDOC) field knowledge Natural Sciences Mathematics. The is a bibliographic study Brazilian Digital Library Theses Dissertations (BDTD) was used for consultation. As result, we obtained 13 works, specifically four nine theses, with majority coming from South Brazil. In terms focus research, following categories emerged: specified LEDOC formative practices....
Variations in the shapes of action and absorption spectra, physiological parameters phytoplankton [α B , biomass ( )-specific initial slope photosynthesis-irradiance curve; PmB plateau φ m ), maximum quantum yield photosynthesis], were studied. Data collected North Atlantic five biogeochemical provinces for two seasons: fall 1992 spring 1993. Further, some nine independent variables tested their ability to predict parameters, using linear regression analyses. It was found that more variable...
Current knowledge of the community structure, life history strategies and trophodynamics euphausiids in Benguela ecosystem is synthesized. Three species dominate, Euphausia lucens over shelf region southern Benguela, hanseni outer off Namibia Nyctiphanes capensis neritic regions northern Benguela. Various models interactions between biological processes physical features are considered to explain likely mechanisms whereby these can remain spatially segregated. All three breed throughout...
The vertical distribution patterns of adult and juvenile Sagitta friderici were investigated over a 48 h period, using samples collected at different depth strata with an RMT 1 x 6 net.Juvenile chaetognaths generally found depths less than 50 m throughout the day night, exhibited limited diel migration patterns.Adults, on other hand, migrated more extensively below during scattered water column or near surface night.Using mean each sampling time, closely followed that large calanoid...