Ecological Archives E085-038-A2

Nico Blüthgen and Konrad Fiedler. 2004. Competition for composition: lessons from nectar-feeding ant communities. Ecology 85:1479–1485.

Appendix B. NMDS ordination of amino acid profiles.

Table B1. Correlations between the ordination of amino acid profiles used in the main text (one-dimensional NMDS, based on Sörensen similarity indices) and individual amino acid parameters (see Appendix A). Correlations are also shown for the second axis of a two-dimensional NMDS (not used in the multiple regression analysis). Significant correlations are in bold.

Factor

NMDS (one dimensional)

NMDS (second dimension)

Total amino acid concentration

  0.42

  0.15

Mean number of amino acids

  0.77

  0.12

Alanine

  0.02

  0.21

Arginine

  0.15

–0.27

Asparagine

  0.26

–0.18

Cysteine

  0.23

–0.35

Glutamic acid

  0.24

–0.25

Glycine

  0.28

  0.00

Histidine

  0.55

  0.12

Isoleucine

  0.52

  0.33

Leucine

  0.54

  0.43

Lysine

  0.50

  0.02

Methionine

  0.45

  0.17

Phenylalanine

  0.39

  0.21

Proline

0.78

–0.16

Serine

  0.67

  0.19

Threonine

–0.21

–0.28

Tyrosine

  0.39

–0.02

Valine

  0.58

  0.19

Lipophilic amino acids

0.72

–0.02

Hydrophilic amino acids

  0.68

–0.18

  basic

  0.57

–0.02

  neutral

  0.13

  0.03

  acidic

  0.46

–0.18

Essential amino acids

  0.62

  0.06

 

 
   FIG. B1. A display of the two-dimensional NMDS. Circles represent extrafloral or floral nectars and wound exudates, and triangles represent honeydew sources. Full species names are given in Appendix A.



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