Ecological Archives E096-159-A1

Adrianne P. Smits, Daniel E. Schindler, and Michael T. Brett. 2015. Geomorphology controls the trophic base of stream food webs in a boreal watershed. Ecology 96:14851492. http://dx.doi.org/10.1890/14-2247.1

Appendix A. Table listing fatty acids included in composite variables used in the principal components analysis (PCA).

Table A1. List of the fatty acids that were summed into composite variables in the principal components analysis. References are included where fatty acids have been attributed to specific groups of organisms (ex. Diatoms):

Composite variable

Fatty acids

References

SAFA

C14:0, C15:0, C16:0, C17:0, C18:0, C20:0, C22:0

 

Green Algae

18:2n6, 18:3n3

Torres-Ruiz et al. 2007

Diatoms

20:5n3, 16:4n3

Torres-Ruiz et al. 2007

SDA

18:4n3

 

Branched
(i.e., bacterial)

iso-17:0, iso-16:0, ante-iso-15:0, iso-15:0

Kharlamenko et al. 1995

MOB

16:1n8

Sundh et al. 2005; Taipale et al. 2012

Sulfate-reducing bacteria

16:1n5

Elvert et al. 2003

C16 MUFA

16:1n7, 16:1n9

 

C14 MUFA

14:1n7, 14:1n5

 

C18 MUFA

18:1n7, 18:1n9

 

ARA

20:4n6

 

Literature cited

Elvert, M., A. Boetius, K. Knittel, and B. B. Jørgensen. 2003. Characterization of specific membrane fatty acids as chemotaxonomic markers for sulfate-reducing bacteria involved in anaerobic oxidation of methane. Geomicrobiology Journal 20:403–419.

Kharlamenko, V. I., N. V Zhukova, S. V Khotimchenko, V. I. Svetashev, and G. M. Kamenev. 1995. Fatty acids as markers of food sources in a shallow- water hydrothermal ecosystem (Kraternaya Bight, Yankich Island, Kurile Islands ). Marine Ecology Progress Series 120:231–241.

Sundh, I., D. Bastviken, and L. J. Tranvik. 2005. Abundance, activity, and community structure of pelagic methane-oxidizing bacteria in temperate lakes. Applied and environmental microbiology 71:6746–52.

Taipale, S. J., M. T. Brett, K. Pulkkinen, and M. J. Kainz. 2012. The influence of bacteria-dominated diets on Daphnia magna somatic growth, reproduction, and lipid composition. FEMS Microbiology Ecology 82:50–62.

Torres-Ruiz, M., J. D. Wehr, and A. a. Perrone. 2007. Trophic relations in a stream food web: importance of fatty acids for macroinvertebrate consumers. Journal of the North American Benthological Society 26:509–522.


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