Lipid composition and food quality of some freshwater phytoplankton for cladoceran zooplankters

Ahlgren, Gunnel; Lundstedt, Lisa; Brett, Michael T.; Forsberg, Curt

doi:10.1093/plankt/12.4.809

Cited by 404 publications

(350 citation statements)

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“…data). These naked flagellates are a preferred food for zooplankton and, with their potentially faster growth rates, are probably of greater importance than the diatoms to the diet of zooplankton (Ahlgren et al 1990). Phytoplankton carbon and nitrogen signatures are known to vary spatially and temporally according to prevailing environmental conditions (Wada 1980).…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes in the importance of the source of organic matter to the diet of zooplankton in Loch Ness, as indicated by stable isotope analysis

Grey

Jones

Sleep³

2001

Limnology & Oceanography

301

303

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Seasonal variations in the stable isotope composition (␦ 13 C and ␦ 15 N) of crustacean zooplankton and their putative food sources in oligotrophic Loch Ness were recorded during 1998. Bulk particulate organic matter (POM) showed ␦ 13 C values consistent with a terrestrial plant origin from the catchment and exhibited little seasonal variation, whereas POM ␦ 15 N was more variable, probably due to associated microbial action. In contrast, phytoplankton ␦ 13 C was relatively light and showed some seasonal variation, but ␦ 15 N values were more constant. The isotopic signatures of both POM and phytoplankton remained sufficiently distinct from each other throughout the period of study to allow their relative contributions to zooplankton diet to be assessed. Zooplankton isotopic signatures shifted seasonally, reflecting a dietary switch from a reliance on allochthonous carbon derived from POM during winter and early spring to heavy dependence on algal production during summer. Annually, crustacean zooplankton in Loch Ness derive approximately 40% of their body carbon from allochthonous sources, likely mediated via microbial links. Separate determination of isotope ratios for the main zooplankton species allowed a more detailed trophic investigation. The most abundant zooplankton species in the loch, Eudiaptomus gracilis, incorporated appreciable allochthonous carbon even during the peak of phytoplankton productivity. By contrast, Daphnia hyalina grew mainly in late summer and autumn and derived almost 100% body carbon from algal sources. This study is the first to quantify such a seasonal switch in zooplankton dependence between allochthonous and autochthonous sources of organic matter in a large lake.The ecological importance of terrestrially derived material to lake food webs is receiving increasing attention. Much of the impetus for this has come from studies of the dark stained waters of small, boreal forest lakes of Scandinavia resulting from humic matter originating in the catchment (Meili 1992). The staining restricts light penetration into the water column and presents an unfavorable environment for photosynthetic fixation of carbon in situ by autotrophic phytoplankton (Jones 1992). Thus, in these systems, autochthonous production is usually very low. Humic material is capable of supporting bacterial metabolism (Hessen 1992) and associated heterotrophic organisms in the microbial loop (Tranvik 1992); consequently, a significant contribution to the humic lake food web may be derived from allochthonous matter via detritus-driven food chains. Jones (1992) hypothesized that the relative importance of allochthonous organic matter to the pelagic food web of lakes should increase with decreasing lake trophy, and a survey of the balance between planktonic production : respiration ratios lent support to this hypothesis (del Giorgio andPeters 1993, 1994). In oligotrophic lakes where community respiration equals or exceeds phytoplankton production (del Giorgio et al. 1997), the heterotrophic plankton must recei...

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Section: Discussionmentioning

confidence: 99%

Seasonal changes in the importance of the source of organic matter to the diet of zooplankton in Loch Ness, as indicated by stable isotope analysis

Grey

Jones

Sleep³

2001

Limnology & Oceanography

301

303

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“…According to Farkas and Herodek (1964), the fatty acid composition of zooplankton proved to be different and it modified differently by the changes of water temperature. They transfer energy from microalgae to higher trophic levels by being eaten as a food through various aquatic organisms (Gold man & Horne, 1983;Ahlgren, Lundstedt, Brett, & Forsberg, 1990;Harris, Wiebe, Lens, Skjoldal, & Huntley, 2000;Farhadian, Kolivand, Khoshdarehgy, Dorch, & Soofiani, 2013). These organisms contain a valuable source of lipid and fatty acids, protein and amino acids, vitamins, and enzymes (Pillay, 1990;Izquierdo, Socorro, Arantzamendi, and Hernandez-Cruz, 2000;Evjemo, Reitan, & Olsen, 2001).…”

Section: Introductionmentioning

confidence: 99%

Untitled

Manickam¹,

Bhavan²,

Santhanam³

2017

Turk. J. Fish. Aquat. Sci.

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The nutritional profiles of wild mixed zooplankton (WM Z) and laboratory cultured Artemia nauplii were compared in the present study. WMZ samples were collected from Sulur lake and Ukkadam lake, Coimbatore, Tamil Nadu, South India. The WMZ from both lakes and Artemia nauplii were utilized for the estimation of biochemical constituents (protein, carbohydrate, lipid, moisture and ash), profiles of amino acids, and fatty acids. Results showed that the total protein content was found to be significantly (P<0.05) higher in WM Z collected from Ukkadam lake, followed by Sulur lake when compared to Artemia whereas, the total carbohydrate and lipid contents were found to be significant ly (P<0.05) higher in Artemia nauplii than WM Z. While, there was insignificant (P>0.05) difference found in ash and moisture contents in all live feeds evaluated. Profile of amino acids and saturated fatty acids were significantly elevated (P<0.05) in WM Z when compared to Artemia. While, in the case of unsaturated fatty acids showed significant (P<0.05) elevations in WM Z of Ukkadam lake followed by Sulur lake and Artemia. The present results revealed that the WMZ has more desirable dietary nutritional characteristics as larval diets than traditional live feed Artemia nauplii.

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“…titularly important to many species of herbivorous zooplankton and benthic invertebrates that cannot synthesize large amounts of lipids or essential fatty acids yet rely on these lipids for reproduction and survival (Goulden and Hornig 1980;Ahlgren et al 1990). Algal lipid is also relevant to contaminant equilibria because all lipids are potential solvents, vectors or sinks for lipophilic contaminants (Harding 1986).…”

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confidence: 99%

Carbon fixation into lipid in small freshwater lakes

Wainman

Lean

1992

Limnol. Oceanogr.

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Algal lipid is a critical food resource for zooplankton, a solvent for lipophilic contaminants, and a useful indicator of phytoplankton nutrient status in culture. Seasonal patterns in lipid production and the photosynthetic parameters describing lipid production were determined for three mesotrophic to oligotrophic, headwater lakes. The mean lipid fraction of C fixation (LFCF) was 15.8% (range 8.5-22.5%) measured bimonthly from 2 May to 2 1 October 1988. Periods of highest nutrient stress were associated with the lowest LFCF, contradicting findings from algal culture experiments and suggesting that nutrient deficiency does not govern lipid synthesis in natural aquatic ecosystems. LFCF was related instead to temperature and daylength, suggesting that it is related to changes in the physical environment.

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Lipid composition and food quality of some freshwater phytoplankton for cladoceran zooplankters

Cited by 404 publications

References 28 publications

Seasonal changes in the importance of the source of organic matter to the diet of zooplankton in Loch Ness, as indicated by stable isotope analysis

Seasonal changes in the importance of the source of organic matter to the diet of zooplankton in Loch Ness, as indicated by stable isotope analysis

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Carbon fixation into lipid in small freshwater lakes

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