STRIVE - Environmental Protection Agency

Molecular Diversity and Dynamics of Toxigenic Blue-green Algae in Irish Lakes
Figure 3.7. Trophic status and associated land cover type of the lakes sampled during summer 2009: ■, ●, ▲
represent zones III, II and I, respectively.
Table 3.4. Significance 1 in space and time of the non-parametric Spearman correlation
tests carried out between land cover type (percentage cover) and chlorophyll-a for
the 50 lakes sampled during summer 2009.
Agricultural type cover Forestry type cover Wetland type cover
Zone I p = 0.339 p = 0.007** p = 0.329
r = 0.134 r = -0.690 r = -0.143
Zone II p = 0.246 p = 0.424 p = 0.334
r = 0.193 r = -0.054 r = -0.121
Zone III p = 0.287 p = 0.245 p = 0.310
r = -0.124 r = 0.152 r = -0.109
Weeks 1–5 p = 0.188 p = 0.369 p = 0.086
r = 0.238 r = 0.091 r = -0.36
Weeks 5–10 p = 0.186 p = 0.049* p = 0.23
r = 0.224 r = -0.401 r = -0.186
Weeks 10–15 p = 0.011* p = 0.041* p = 0.008**
r = 0.565 r = -0.448 r = -0.594
Whole period p = 0.010** p = 0.058 p = 0.005**
r = 0.329 r = -0.225 r = -0.364
1 * and ** indicate 2-tail significance at the 0.05 and 0.01 levels, respectively.
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