Ecological Archives E090-241-A4

Ian Donohue, Andrew L. Jackson, Martin T. Pusch, and Kenneth Irvine. 2009. Nutrient enrichment homogenizes lake benthic assemblages at local and regional scales. Ecology 90:3470–3477.

Appendix D. Results of SIMPER analyses identifying the five (a) littoral and (b) profundal/sub-littoral taxa contributing most to the dissimilarity between nutrient-poor and nutrient-rich lakes and indicating the relative changes in the abundance of each taxon in lakes of differing trophic status.

 

Taxon

Relative change in abundance in eutrophic compared with oligotrophic lakes

Contribution to total dissimilarity between oligotrophic and eutrophic lakes
(%)

Cumulative contribution
(%)

(a)

Asellus aquaticus

7.26

7.26

 

Gammarus sp.

6.33

13.59

 

Oligochaeta

5.87

19.46

 

Pisidium/Sphaerium sp.

5.56

25.01

 

Caenis sp.

5.33

30.34

(b)

Limnodrilus sp.

8.74

8.74

 

Chaoboridae

7.02

15.76

 

Potamothrix hammoniensis

6.95

22.71

 

Chironomus

6.13

28.84

 

Pisidium/Sphaerium sp.

6.04

34.88


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