SI: Flowering synchrony index of Albert et al.(2001)

Description Usage Arguments Details Value Note Author(s) References See Also Examples

Description

Flowering synchrony was calculated considering all pairs of plants or poluplation.

Usage

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SI(dd, pop)

Arguments

dd

Flowering data.

pop

Research scale, such as Population, individual, inflorescence, single flowers.

Details

si=(1/(n-1))*sum(aij/bij)

Value

m

number of record days

n

number of group levels

f

names of group levels

aij

number of days on which j and i individuals are simultaneously flowering

bij

number of days on which at least one of them (j and/or i) is flowering

si

synchrony index,this index ranges from 0 (no synchrony) to 1 (flowering overlap is complete)

Note

nothing

Author(s)

WANG,XIE

References

[1]Albert MJ, Escudero A, Iriondo JM. Female reproductive success of narrow endemic Erodium paularense in contrasting microhabitats. Ecology.2001,82,1734~1747.

[2]Augspurger CK. Reproductive synchrony of a tropical shrub: experimental studies on effects of pollinators and seed predators on Hybanthus prunifolius (Violaceae),Ecology.1981,62,775~788.

See Also

nothing

Examples

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a1=c(0,1,1,1,0,0,0)
a2=c(0,1,0,1,1,0,0)
a3=c(0,0,0,1,1,1,0)
a4=c(0,0,0,1,1,0,1)
pop=c("pop1","pop1","pop2","pop2")
dd=rbind(a1,a2,a3,a4)
colnames(dd)=c("D5/1","D5/2","D5/3","D5/4","D5/5","D5/6","D5/7")
C=SI(dd,pop)
C


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