[R-sig-Geo] ENFA: Contrasting Scores between species

[alannie]

Hi All!

Interested in contrasting the marginality and specificity scores from ENFA
for a group of closely related species that live in the same general region.
They contrast with each other based on breeding system. 

I have the following questions:
1) If marginality for the species is above 1, how would you interpret the
value?

I realize that in the Hirzel et al. 2002 paper it states "A large value
(close to one) means that the species lives in a very particular habitat
relative to the reference set."  

However, I am not sure if a value of 1.2 is less marginal than a value of
4.5. 

In this example, 4.5 is large, but it is further from one than 1.2.

Would any value closest to 1 be the least marginalized?

2)Whichever the result, what would be the best way to analyze a set of data
contrasting marginality scores of different groups? I have been using a z
test. But, perhaps there is better way you can enlighten me to!

I am looking at species that evolved from one another, by the way.
Something like: green species that evolved from yellow species and seeing if
the marginality is different. 

Thanks!

Alannie



--
View this message in context: http://r-sig-geo.2731867.n2.nabble.com/ENFA-Contrasting-Scores-between-species-tp7587015.html
Sent from the R-sig-geo mailing list archive at Nabble.com.