Lipid composition of Collembola and their food resources in deciduous forest stands—Implications for feeding strategies

The lipid composition of Collembola and their potential food resources was assessed in three deciduous forest stands, in order to gain insight into food web linkages under field conditions

Liliane Ruess

2007

Key concepts

Scholarcy highlights

  • The lipid composition of Collembola and their potential food resources was assessed in three deciduous forest stands, in order to gain insight into food web linkages under field conditions
  • As potential food sources soil microbiota and plant debris were characterised by their phospholipid fatty acid composition. Both the amount and the pattern of PLFAs differed between sites and soil depth, in particular the bacterial and plant marker Fatty acids in the upper soil layer
  • The lipid composition of vital and senescent beech leaves was predominantly influenced by metabolic status and represented a quite homogenous FA resource across forest stands
  • Comparing Folsomia quadrioculata, Lepidocyrtus lignorum, Neanura muscorum and Pogonognathellus longicornis between the different forests revealed FA profiles to be predominantly affected by site, suggesting a diet shift depending on resources at hand
  • Lipids of Collembola comprised low amounts of bacterial marker FAs, and bacterial consumption may occur to some extent, on Gram-positives
  • The ratio 18:1ω9/18:2ω6,9 is proposed as a tool to distinguish between these two major feeding strategies in Collembola

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