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Physiology limits commercially viable photoautotrophic production of microalgal biofuels

, Swansea SA2 8PP , UK 1 Kevin J. Flynn Algal biofuels have been offered as an alternative to fossil fuels, based on claims that microalgae can provide a highly productive source of compounds as feedstocks

Minimising losses to predation during microalgae cultivation

We explore approaches to minimise impacts of zooplanktonic pests upon commercial microalgal crops using system dynamics models to describe algal growth controlled by light and nutrient availability and zooplankton growth controlled by crop abundance and nutritional quality. Losses of microalgal crops are minimised when their growth is fastest and, in contrast, also when growing ...

Coupling a simple irradiance description to a mechanistic growth model to predict algal production in industrial-scale solar-powered photobioreactors

of Science, Swansea University , Swansea SA2 8PP , UK 1 Kevin J. Flynn Various innovative photobioreactor designs have been proposed to increase production of algae-derived biomass. Computer models

Ocean Acidification Affects the Phyto-Zoo Plankton Trophic Transfer Efficiency

The critical role played by copepods in ocean ecology and biogeochemistry warrants an understanding of how these animals may respond to ocean acidification (OA). Whilst an appreciation of the potential direct effects of OA, due to elevated pCO2, on copepods is improving, little is known about the indirect impacts acting via bottom-up (food quality) effects. We assessed, for the ...

Modelling alkaline phosphatase activity in microalgae under orthophosphate limitation: the case of Phaeocystis globosa

Many phytoplankton exploit phosphorus (P) from organic sources when dissolved inorganic P (DIP) is depleted. This process is, however, rarely considered in ecological and biogeochemical models. We present a mechanistic model describing explicitly the ability of phytoplankton to use dissolved organic P (DOP) when DIP is limiting, by synthesizing alkaline phosphatase (AP) that ...

In silico optimization for production of biomass and biofuel feedstocks from microalgae

Philip Kenny p.kenny@swansea.ac.uk Kevin J. Flynn k.j.flynn@swansea.ac.uk 0 ) Centre for Sustainable Aquatic Research, Department of Biosciences, College of Science, Swansea University , Singleton

Acclimation, adaptation, traits and trade-offs in plankton functional type models: reconciling terminology for biology and modelling

We propose definitions in terminology to enhance ongoing collaborations between biologists and modellers on plankton ecology. Organism “functional type” should refer to commonality in ecology not biogeochemistry; the latter is largely an emergent property of the former, while alignment with ecology is also consistent with usage in terrestrial science. Adaptation should be confined, ...

Food-density-dependent inefficiency in animals with a gut as a stabilizing mechanism in trophic dynamics

Animals with a gut, when confronted with food supplied ad libitum, can elevate their ingestion rates and inefficiently use the material they ingest. As a consequence, assimilation efficiency (AE) declines, resulting in food-density-dependent inefficiency (f-DDI). A model describing these processes shows that f-DDI can dampen the consequences of oscillations in food abundance that ...

Building the “perfect beast”: modelling mixotrophic plankton

KEVIN J. FLYNN 0 ADITEE MITRA 0 0 INSTITUTE OF ENVIRONMENTAL SUSTAINABILITY A mechanistic model is described for carbon - nitrogen - phosphorous-based interactions within a protistan mixotroph. The

The importance of the form of the quota curve and control of non-limiting nutrient transport in phytoplankton models

KEVIN J. FLYNN 0 0 INSTITUTE OF ENVIRONMENTAL SUSTAINABILITY The description of phytoplankton growth and nutrient acquisition plays a pivotal role in affecting the performance of plankton ecosystem

Reply to Horizons Article ‘Plankton functional type modelling: running before we can walk’ Anderson (2005): II. Putting trophic functionality into plankton functional types

KEVIN J. FLYNN 0 0 INSTITUTE OF ENVIRONMENTAL SUSTAINABILITY, UNIVERSITY OF WALES SWANSEA , SINGLETON PARK, SWANSEA SA doi:10.1093/plankt/fbl015, available online at www.plankt.oxfordjournals.org

Promotion of harmful algal blooms by zooplankton predatory activity

Aditee Mitra Kevin J Flynn Receive free email alerts when new articles cite this article - sign up in the box at the top right-hand corner of the article or click here References Email alerting ... algal blooms by zooplankton predatory activity Aditee Mitra and Kevin J. Flynn* Institute of Environmental Sustainability, Wallace Building, University of Wales Swansea, Swansea SA2 8PP, UK *Author for

Misuse of the phytoplankton–zooplankton dichotomy: the need to assign organisms as mixotrophs within plankton functional types

The classic portrayal of plankton is dominated by phytoplanktonic primary producers and zooplanktonic secondary producers. In reality, many if not most plankton traditionally labelled as phytoplankton or microzooplankton should be identified as mixotrophs, contributing to both primary and secondary production. Mixotrophic protists (i.e. single-celled eukaryotes that perform ...

Predator–prey interactions: is ‘ecological stoichiometry’ sufficient when good food goes bad?

ADITEE MITRA 0 KEVIN J. FLYNN 0 0 INSTITUTE OF ENVIRONMENTAL SUSTAINABILITY The dietary value of a prey type varies with its nutritional status and hence with its C:N:P content. However, while

A mechanistic model for describing dynamic multi-nutrient, light, temperature interactions in phytoplankton

KEVIN J. FLYNN 0 0 ECOLOGY RESEARCH UNIT Developed by combining components simplified from previously developed mechanistic models, a complete dynamic model is described for simulating the growth of

Phagotrophy in the origins of photosynthesis in eukaryotes and as a complementary mode of nutrition in phototrophs: relation to Darwin's insectivorous plants

Darwin performed innovative observational and experimental work on the apparently paradoxical occurrence of carnivory in photosynthetic flowering plants. The nutritional use of particulate organic material which also supplies other elements is now known to be widespread in free-living algae as well as in organisms with endosymbiotic algae and with kleptoplastids. In addition to ...

Operation of light–dark cycles within simple ecosystem models of primary production and the consequences of using phytoplankton models with different abilities to assimilate N in darkness

We compare the output of a nitrogen–phytoplankton–zooplankton (NPZ) model and of a hypothetical diatom–flagellate competition scenario operating in continuous light or in a diurnal light–dark cycle of equal daily photon dose. Within these models, phytoplankton were configured with contrasting abilities to assimilate nitrogen in darkness. If only a single phytoplankton group is ...

Modelling Si–N-limited growth of diatoms

A mechanistic model for silicon (Si) physiology is developed, interfaced with a model of nitrogen (N) physiology, which is capable of simulating the major documented facets of Si–N physiology in diatoms. The model contains a cell cycle component that is involved in regulating the timing of the synthesis of valves, girdles and setae. In addition to reproducing the timing of diatom ...

A short version of the ammonium-nitrate interaction model

The performance of the complex ammonium-nitrate interaction model (ANIM) of Flynn et al. (Philos. Trans. R. Soc., 352, 1997) is compared with that of a simplified version (SHANIM) in which the internal pools of inorganic nitrogen (N) and the enzymes of nitrate-nitrite reduction and glutamine synthetase are absent. Although SHANIM is incapable of simulating cell size-linked ...

Changes in toxins, intracellular and dissolved free amino acids of the toxic dinoflagellate Gymnodinium catenatum in response to changes in inorganic nutrients and salinity

The paralytic shellfish poison prducing dinoflagellate Gymnodiniun catemrum was subjected to changes in salinity, phosphate, ammonium and nitrate using continuous culture and batch culture methods. In contrast with other algae, this species showed very slow changes in the concentration of intracellular amino acids, in the Gln:Glu ratio, and, in contrast with Alrsandnum spp., only ...