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Table 2 Land use characterization for Location (sampling sites) and Group (sites grouped in Table 1)

From: Do biofilm communities respond to the chemical signatures of fracking? A test involving streams in North-central Arkansas

Location

Forest

Pasture

Urban

Group

A = Rock creek

1.22

0.04

0.01

1

B = Driver creek

1.29

0.02

0.01

1

C = Cedar creek

1.10

0.09

0.01

1

D = Sis hollow

0.94

0.14

0.01

1

A = East fork

0.69

0.24

0.02

2

B = Sunnyside creek

0.51

0.41

0.01

2

C = Hogans creek

0.82

0.23

0.03

2

D = Black fork

0.40

0.52

0.02

2

F-value

19.45

13.66

6.00

 

Probability

0.005a

0.010a

0.050

 
  1. Sites are geographically depicted in Fig. 1; Allocation of sites to Group is provided in Table 1; Sites labeled as Group 1 are within a ‘minimally impacted catchment zone’ (=MICZ), whereas sites labeled as Group 2 are within a ‘potentially impacted catchment zone’ (PICZ) that contains a significantly greater density of unconventional natural gas (UNG) wells; Forest, Pasture, and Urban represent arcsin transformed values originally recorded as percentage within a 1 km2 radius of the catchment area; F-value is the F-statistic recorded in a 1-way analysis of variance (ANOVA) by Group [i.e., = MICZ (1) versus PICZ (2)] as derived in R [41]; Probability represents statistical significance of each F-value determined by Bonferroni adjusted alpha = 0.017, with significance indicated by ana