Beta Diversity
To measure species turnover and rewiring in our seasonal networks, we
quantified the β -diversity across Fall and Spring. We adopted aβ -diversity metric, βWN, proposed by
Poisot et al. (2012), which measured the interaction turnover
between two networks, with 0≤βWN ≤1. This metric
can be represented by the following equation:
\(\beta_{\text{WN}}=\frac{a+b+c}{(2a+b+c)/2}-1\),
where \(a\) was the number of interactions shared between networks (Fall
and Spring), and \(b\) and \(c\) were the number of interactions unique
to each network, respectively. Hence, larger values ofβWN indicated a greater difference between the
two networks. We further isolated the effects of species turnover,βST , and rewiring, βRW ,
from βWN using the equationβWN =βST +βRW .