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. 2011 Feb 28;6(2):e17407. doi: 10.1371/journal.pone.0017407

Table 3. Geographic summary statistics for each estuary network.

Network Primary Source of Stress Number Std. dist (km) Sum area (ha) Avg area (ha) Propn. area Propn. Sample
1 Agriculture 6 153 1,837 306 0.3% 4.3%
2 Development 22 103 9,222 419 1.6% 15.7%
3 All (moderate levels) 35 608 378,638 10,818 65.0% 25.0%
4 Shellfish aquaculture 19 454 138,247 7,276 23.7% 13.6%
5,8,9 Forestry/water qual. 30 411 47,881 1,596 8.2% 21.4%
6 Few (low levels) 23 518 6,631 288 1.1% 16.4%
7 Climate change 5 8 10 2 0.0% 3.6%

Standard distance is a measure of the spatial dispersion of the network, lower values are compact, higher values are spread out. The proportion area is the total area of the network divided by the total area of all estuaries in the study. Proportion sample is the number of estuaries in the network divided by the total number in the study.