[R] PCA analysis, presence-absence of mammals in parks

[zloutor]

Hi everyone,

So I am trying to see which ecological parameter of different parks in nyc
influence the most the diversity of the medium-sized mammals in those parks.
I have a bunch of different parameters for each park I'm done studying and
the presence (1) and absence (0) of each mammal. I wanted to do a principal
component analysis of those data to know which ones of those parameters are
the most important.

Here is what I have:


Parc		         PBP             VCP	PP	        CP
surfacekm²  	0.917	           4.64	0.0213	3.4
woodenarea	0.514 	0.6355	0.32	        0.4952
scrubland	        0.0905	0.0412	0.06         	0.0498
lawn	         	0.3654	0.2837	0.50	        0.296
lake	         	0.0028	0.0166	0.12    	0.1488
wetareas	        0.0273	0.0230	0	        0.0102
intertidalearea	0.0283	0       	0	        0
sportsfields	        0.0887	0.2579	0.12      	0.1323
humanactivity	0.4196	0.7271	0.23     	0.7912
#ofhighways	2	        3	        0           	0
#ofroads	        4	        22	        7        	11
distanceA	        5.31	        4.02	        1.61	        4.02
distanceB	        6.12	        4.51	        3.7       	4.02
distanceC	        7.56	        5.47	        7.72     	6.44
distanceD        	9.66       	9.66      	19.31 	9.01
AvgPopN		1133     	0	        5380	        6835
AvgPopS		0	        7022	        5380	        4711
AvgPopE		0	        3592       	8536	        4307
AvgPopW		3940	        3220     	4840	        9360
raccoon		1	        1	        1	        1
skunk		        1          	1	        1	        1
opossum		1	        1	        1	        0
rabbit		        1	        1	        1	        0
groundhog        	0	        0	        0	        0
muskrat		0	        0       	0	        0


I get to open the .txt with R but then it gives me something pretty weird
when I try to use the function dudi.pca(parcs)... 

Can anyone suggest me how I should to my analysis? I would really really be
thankful for that!

Geo.
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