{delta}15N signatures of marine mesozooplankton and seston size fractions in Kiel Fjord, Baltic Sea期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

{delta}15N signatures of marine mesozooplankton and seston size fractions in Kiel Fjord, Baltic Sea

Authors:	Sommer, Frank Sommer, Ulrich

Affiliation:	Leibniz-Institut Für Meereswissenschaften, Experimental Ecology, Düsternbrooker Weg 20, D-24105 Kiel, Germany

Abstract:	The ${delta}$ ¹⁵N of marine mesozooplankton species was measured on fouroccasions. Significant differences were found between copepodsand meroplanktonic larvae, yet not between holoplanktonic species.On average, mesozooplankton was enriched by 3.4 ± 0.9 ${per thousand}$ relative to selected seston size fractions. Despite suggestingsmall differences ( $~$ 0.5 to 1 ${per thousand}$ ) in the ${delta}$ ¹⁵N of different phytoplanktontaxa on one occasion, the size fractionation procedure generallyproved inadequate in separating major taxonomic groups composingseston. This circumstance, and phase-shifts in the transmissionof rapid changes (>2 ${per thousand}$ ) in seston ${delta}$ ¹⁵N to mesozooplankton complicatethe calculation of mesozooplankton trophic levels.

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