Long Term Trends
Long Term Trends
Long Term Trends
Seagrass beds in
Mosquito Lagoon
Abstract
Submerged Aquatic Vegetation
(SAV) at Kennedy Space Center has been
monitored since 1983 utilizing fixed
transects, aerial photography and GIS.
Analysis of the yearly transect data
(1983-1995) and GIS maps from 1989,
1992 and 1995 have shown a long-term
decline in SAV throughout these waters.
Introduction
Kennedy Space Center has been conducting baseline
studies in Mosquito Lagoon since the 1970’s in
preparation for the shuttle launch complexes. These data
have provided static glimpses at a local level as to the
status of environmental parameters. These data have
proven useful for discerning potential threats to the
environment, as well as potential causes and sources of
such threats.
45.00
40.00
35.00
30.00
25.00 0 1 2 3 4
0 1 2 3 4
20.00 Linear Trend Line
15.00
10.00
5.00
0.00
89 92 95
SAV Variation by the
Numbers
Area % 89 92 95
0 35.91 45.38 37.69
1 9.17 1.73 9.02
2 5.60 2.74 3.40
3 5.21 1.15 3.84
4 44.10 49.00 46.05
Total Area Sq Ft 1038481619.06 1038481619.06 1038481619.06
Total SAV 64.09 54.62 62.31
% Change -9.47 7.69
SAV Variation by the
Numbers
% Contributed |------------89-92----------|--------------92-95----------
1 Decline 78.60 Increase 94.80
2 Decline 30.23 Increase 8.50
3 Decline 42.93 Increase 35.08
4 Increase 51.77 Decline 38.37
SAV Variation by the
Numbers
N % (Polygons) 89 92 95
0 10.56 22.17 11.60
1 15.76 9.28 23.97
2 20.03 14.40 15.79
3 16.45 7.22 10.13
4 37.19 46.93 38.51
Grand Total 3654 3654 3654
Total SAV 89.44 77.83 88.40
%Change -11.60 10.56
Mean Area 89 92 95
0 80366.92 42549.14 77886.22
1 7976.663 8424.416 3876.854
2 4514.573 2814.431 2315.474
3 2840.957 5044.014 7283.321
4 5551.342 4687.961 5488.137
Density normalized SAV
Mean % Cover 89 92 95
0 372925471.92 471239200.62 391357875.22
12.5 11908032.84 2248439.86 11714226.90
37.5 21826745.56 10681200.13 13226521.36
62.5 33821867.57 7441724.95 24955139.92
87.5 400725711.30 445256821.86 418434608.52
Grand Total 1038481619.06 1038481619.06 1038481619.06
Total SAV 468282357.27 465628186.80 468330496.69
Mean % Cover 89 92 95
0 35.91 45.38 37.69
12.5 1.15 0.22 1.13
37.5 2.10 1.03 1.27
62.5 3.26 0.72 2.40
87.5 38.59 42.88 40.29
Grand Total 1038481619.06 1038481619.06 1038481619.06
Total SAV 45.09 44.84 45.10
% Change -0.26 0.26
Density Normalized SAV
45.00
89 92 95
40.00
35.00
30.00
25.00
20.00
15.00
10.00
5.00
0.00
12.5 37.5 62.5 87.5
Density Normalized SAV
50.00
45.00
40.00
0
35.00 12.5
37.5
30.00 62.5
87.5
25.00 0
87.5
20.00 37.5
62.5
15.00 12.5
10.00
5.00
0.00
89 92 95