Seasonal variations in phytoplankton and glycollate concentrations in the Menai Straits, Anglesey

Hasan-Al, R. H.; Coughlan, Aditipant S. J.; Fogg, G. E.

doi:10.1017/s0025315400017252

Cited by 33 publications

(2 citation statements)

References 15 publications

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“…When ambient concentrations of certain organic substances are low, it is expected that increased proportions of some immediate products of algal metabolism are released. High algal excretion was furthermore observed under light conditions inhibitory to photosynthesis and was explained by cell nientbrane damage as well as by increased photorespiration (FOGG et al., 1965, AL HASAN, 1976. SHARP (1977) suggested that what previously had been attributed t o excretion, to a great extent is an artefact caused by experimental shock, cell rupture during filtration, and inadequate correction for blanks.…”

Section: Introductionmentioning

confidence: 99%

Diel Patterns of Phytoplankton Productivity and Extracellular Release in Ultra‐Oligotrophic Lake Tahoe

Tilzer¹,

Horne

1979

Intl Review of Hydrobiology

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Phytoplankton in Lake Tahoe is dominated by diatoms and chrysophytes. High water transparency permits photosynthesis to a maximum depth of over 100 m. Average annual primary production rates in the entire trophogenic zone are 0.5–0.6 g C m−3 year−1. Nutrient concentrations and biomass parameters showed little diel variation. Photosynthesis in mixed water columns decreased in the afternoon. This decline can be attributed to inactivation of algae by overoptimal light during mid‐day hours. As the summer season progressed, algae became adapted to high light intensities and thus were less susceptible to light inhibition. Extracellular release by algae averaged 12.5 ± 7.4% of assimilated carbon without significant vertical differences. Damage of cells by light thus can be excluded. Respiratory losses overnight comprised at least 30% of the carbon assimilated during the preceding day. Integral photosynthesis showed a logarithmic relationship to incident light which can be used to predict daily production rates from mid‐day incubation with an error of well below 10%.

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Section: Introductionmentioning

confidence: 99%

Diel Patterns of Phytoplankton Productivity and Extracellular Release in Ultra‐Oligotrophic Lake Tahoe

Tilzer¹,

Horne

1979

Intl Review of Hydrobiology

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“…After extraction, carrageenan is widely used as a gelling agent, stabilizer, and in food derivatives such as meat puree, seafood paste, and surimi [6,7]. The three most known types of carrageenan are lambda, iota, and kappa, which determine the usage of the particular component in the processing industry [8]. As there are several different types of carrageenan, it is necessary to research…”

Section: Introductionmentioning

confidence: 99%

Analysis of yield and types of carrageenan from different strains at Kupang Bay seaweed production center, East Nusa Tenggara

Sani,

Oedjoe,

Turupadang

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Kappaphycus alvarezzi is a species widely cultivated by the seaweed farmers surrounding Kupang Bay since the early 2000s. K. alvarezzi is sold as raw materials for the carrageenan industry as its hydrocolloid properties are used as emulsion and suspension stabilizers in the food and pharmaceutical industries. This study determines the yield and identifies the type of carrageenan from algal farms at Kupang Bay. Samples are collected from five production centers, then extracted at the Wet Laboratory at the Undana Faculty of Animal Husbandry, Marine and Fisheries in Kupang; and the extracted carrageenan is then analyzed using infrared spectroscopy at the Laboratory of the Faculty of Advanced and Multidisciplinary Technology Universitas Airlangga in Surabaya. The results showed that the highest yield of carrageenan was seaweed from Sulamu (25.72%) then, followed by Oenaek (19.6%), Tablolong A (13.48%), South Semau (11%), and Tablolong B as the lowest yield (9.6% ). Both the presence of functional groups such as D-galactose-4-sulphate and 3,6 anhydro D-galactose groups and the absence of D-galactose-2-sulfate and the 3,6 anhydrogalactose-2-sulfate group, concluded that the type of carrageenan produced in Kupang Bay is the kappa carrageenan.

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Einige Aspekte der Produktion und des biologischen Umsatzes organischen Materials in Gewässern ‐ eine Literaturübersicht

Spittler

Schwarz²,

Schnese

1978

Acta hydrochim. hydrobiol.

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Die vorliegende Arbeit berücksichtigt 231 Publikationen über die Produktion und den biologischen Umsatz organischen Materials insbesondere im Pelagial limnischer und mariner Ökosysteme. Zunächst werden die verschiedenen Sestonbestandteile und die gelösten organischen Verbindungen quantitativ und qualitativ beschrieben. Bei den Primärproduzenten wird besonders das Phytoplankton betrachtet und auf Beziehungen zum Trophiegrad eingegangen. Anschließend erfolgt eine Untersuchung jener Prozesse, welche zur Entstehung von toten partikularen und gelösten organischen Stoffen führen. Der Eintrag allochthoner organischer Materialien wird kurz behandelt. Ausgehend von den konventionellen Vorstellungen über den Umsatz der Primärproduzenten in Weidenahrungsketten wird auf neuere Ergebnisse eingegangen, welche den Umsatz von toten partikulären und gelösten organischen Materialien in Destruentennahrungsketten beinhalten und dabei die zentrale Stellung der Bakterien diskutiert. Die Zooplanktonpopulationen eutropher‐und oligotropher Gewässer werden hinsichtlich ihrer Nahrungsbiologie sowie populationsdynamischer Aspekte verglichen. Abschließend wird auf Versuche hingewiesen, die hohe Primärproduktion eutropher Gewässer durch den Besatz mit planktonfressenden Fischen verstärkt wirtschaftlich zu nutzen.

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Seasonal variations in phytoplankton and glycollate concentrations in the Menai Straits, Anglesey

Cited by 33 publications

References 15 publications

Diel Patterns of Phytoplankton Productivity and Extracellular Release in Ultra‐Oligotrophic Lake Tahoe

Diel Patterns of Phytoplankton Productivity and Extracellular Release in Ultra‐Oligotrophic Lake Tahoe

Analysis of yield and types of carrageenan from different strains at Kupang Bay seaweed production center, East Nusa Tenggara

Einige Aspekte der Produktion und des biologischen Umsatzes organischen Materials in Gewässern ‐ eine Literaturübersicht

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