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Phosphorus limitation of Daphnia growth: is it real?

February 21st, 2007 | No Comments | Posted in Algae-Cultivation, Algae-Nutrients

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Phosphorus limitation of Daphnia growth: is it real?

Urabe, Jotaro; Clasen, Jessica; Sterner, Robert W.
Limnology and Oceanography (1997), 42(6), 1436-1443 CODEN: LIOCAH; ISSN: 0024-3590. English.


The possibility of P limitation for zooplankton growth has many implications for understanding changes in production efficiency and feedback dynamics between consumers and resources. However, there have been no direct tests to determine whether the putative P limitation is real. To answer this question, we directly supplied inorg. P to Daphnia magna apart from food algae, Scenedesmus acutus, and then examined changes in body mass. During the period from birth to age 6 d, D. magna were fed on live algae for 19 h and placed in water of high inorg. P (4 mM: P treatment) for 5 h each day. We used P-free water as a control treatment. Growth rate estimated from initial and final body mass during the 6-d incubation was significantly larger in the P treatment than in the control treatment when Daphnia fed on P-deficient algae, whereas a significant difference was not detected between the treatments for Daphnia fed on P-sufficient algae (C: P atomic < href="">source link here

Nature gave us oil from algae; perhaps we should try Nature’s way again

Oilgae – Oil & Biodiesel from Algae
Oilgae Blog; The complete list of Oilgae Blog articles.
algOS – Biodiesel from Algae Open Source

About Oilgae – Oilgae – Oil & Biodiesel from Algae has a focus on biodiesel production from algae while also discussing alternative energy in general. Algae present an exciting possibility as a feedstock for biodiesel, and when you realise that oil was originally formed from algae – among other related plants – you think “Hey! Why not oil again from algae!”

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