Partial Least Square Analyses of Landscape and Surface Water Biota Associations in the Savannah River Basin

Table 3

Root minimum of predictive residual (PRESS) and its statistics and percent variation accounted for by the three PLS significant factors. Factors for preliminary PLS model for the surface water biota (4 variables) and landscape (26 variables). Only eight factors were shown below. Bold number denotes the first absolute minimum root means PRESS and its statistics.

# Factors	0	1	2	3	4	5	6	7	8
Root Mean Press	1.071	0.997	0.984	0.968	0.998	1.047	1.132	1.149	1.179
𝑇^2	17.064	12.556	7.709	0.000	5.748	12.00	3.580	5.099	3.647
𝑃>𝑇^2	0.001	0.006	0.092	1.000	0.172	0.003	0.493	0.245	0.468
Variation in Landscape (%)	—	25.180	19.978	9.727	Total	54.88	—	—	—
Variation in Biota (%)	—	21.754	6.676	5.374		33.80	—	—	—