Table 1

Elements in a species association matrix. Interaction frequencies (aij) between c animal and r plant species and their respective totals (rows:Ai, columns: Aj, total elements: m).

Animal sp.1

sp. 2

...

sp. c

Total


Plant sp. 1

a11

a12

...

a1c

<a onClick="popup('http://www.biomedcentral.com/1472-6785/6/9/mathml/M2','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6785/6/9/mathml/M2">View MathML</a>

sp. 2

a21

a22

...

a2c

<a onClick="popup('http://www.biomedcentral.com/1472-6785/6/9/mathml/M3','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6785/6/9/mathml/M3">View MathML</a>

...

...

...

...

...

...

sp. r

ar1

ar2

...

arc

<a onClick="popup('http://www.biomedcentral.com/1472-6785/6/9/mathml/M4','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6785/6/9/mathml/M4">View MathML</a>


Total

<a onClick="popup('http://www.biomedcentral.com/1472-6785/6/9/mathml/M5','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6785/6/9/mathml/M5">View MathML</a>

<a onClick="popup('http://www.biomedcentral.com/1472-6785/6/9/mathml/M6','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6785/6/9/mathml/M6">View MathML</a>

...

<a onClick="popup('http://www.biomedcentral.com/1472-6785/6/9/mathml/M7','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6785/6/9/mathml/M7">View MathML</a>

<a onClick="popup('http://www.biomedcentral.com/1472-6785/6/9/mathml/M8','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6785/6/9/mathml/M8">View MathML</a>


Blüthgen et al. BMC Ecology 2006 6:9   doi:10.1186/1472-6785-6-9

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