Appendix 1. Land-cover change matrices in the San Juan-La Selva Biological Corridor demonstrating area changes (km2) from one category to another for the periods 1986 to 1996 and 1996 to 2001, as determined from classified Landsat TM images. Difference estimates for each column indicate a net loss (-) or gain between dates for each land-cover category. Numbers in bold along the main diagonal are the amount of area without change. RF stands for reforested area; SF, secondary forest; NF, natural forest.


Table A1-1. Land-cover changes from 1986 to 1996.

 
Clouds
Crops
Pasture
Riparian
RF
Charral
SF
NF
Clouds
0
0.1
3
0.1
0
0.4
0.1
1.9
Crops
9.5
3.5
35.8
1.7
0.2
6
0.6
12
Pasture
54.4
11.7
327.5
11.7
3.8
71.7
2.1
83.2
Riparian
12.7
0.7
21.1
6.8
1
10.3
0.4
32.9
RF
50.1
0.7
47.9
1.4
6.6
36.1
2
67.4
Charral
13.6
2.5
51.7
6.1
2.4
27
1.3
56.9
SF
7.9
0.8
13.8
2.1
1.2
13.2
1.2
40.5
NF
7.5
2.9
46.1
16.9
3.7
41
4.3
1038.2
Difference
-154.7
47
13.2
35.6
193.9
-42
69.4
-179


Table A1-2. Land-cover changes from 1996 to 2001.

 
Clouds
Crops
Pasture
Riparian
RF
Charral
SF
NF
Clouds
0
0.2
2.5
0.5
0.8
0.4
0.1
2.8
Crops
0.4
16
27
3.7
3.6
4.8
1.5
6
Pasture
2.9
30.1
374.6
15.7
27.2
43
8.3
23.6
Riparian
0.4
4.1
39.6
23.1
9.3
18.9
3.8
28.7
RF
0.4
5.8
39.6
14.7
102.7
21.3
11.7
70
Charral
0.3
3.5
28.9
6.1
22.2
20.9
7.1
15.2
SF
0.6
2.5
17.8
3.3
11.5
13.9
12.8
37.1
NF
0.5
6.4
33.5
18.4
35
38.7
35.7
976.8
Difference
1.4
-4.5
-37.1
47.5
54.7
-59.9
19.7
-11.7