Table 2. Measures of habitat complexity, water quality, fish density, and marine-derived nutrients among five pan-Pacific Rim sites in the Salmonid Rivers Observatory Network (SaRON). Water chemistry values are means standard deviation, with range below. Bracketed values are sample sizes. Fish and water quality data are from main channel shallow shoreline sites only. Vegetation species/types sampled: Co = cottonwood (Populus spp.); W = willow (Salix spp.); D = red osier dogwood (Cornus sericea); F = Filipendula kamtschatica; Bl = Arctic blackberry (Rubus arcticus); Bi = paper birch (Betula papyrifera); G = grass (Poaceae); Sa = salmonberry (Rubus spectabilis); E = elderberry (Sambucus spp.); Se = Senecio cannabifolius; Ch = Chosenia arbutifolia; N = stinging nettle (Urtica dioica). All data are from SaRON 2004–2006 except for Skeena River (data from 2005–2006) and * Riverscape Analysis Project (2010); ** Quickbird floodplain imagery (Lorang et al. 2005).


Kitlope Skeena Kwethluk Kol Utkholok
Latitude * 53°15' N 54°12' N 60°49' N 53°49' N 57°43' N
Longitude * 127°54' W 129°35' W 116°24' W 155°57' E 156°52' E
Catchment area (km2) * 3206 51,383 3787 1502 1371
Channel complexity
(nodes per kilometer) **
18.03 21.65 21.49 16.32 4.96
Non-vegetative cover of
floodplain study reach **
49% 44% 11% 8% 18%
Large wood cover of floodplain study reach ** 0.88% 0.55% 0.01% n/a n/a
Annual max. water temp.
(ºC)
13.5 16.8 16.8 15.1 18.8
Nitrate and nitrite (μg L-1) 23.63 ± 23.60 (13)
88.40 – 96.32
19.80 ± 11.60 (9)
7.53 – 47.53
14.52 ± 6.50 (52)
4.94 – 40.52
167.23 ± 129.27 (27)
8.84 – 591.02
51.65 ± 42.79 (18)
0.49 – 118.658
Ammonium (μg L-1) 19.21± 43.18 (26)
0 – 206.59
13.23±13.81 (52)
0 – 67.42
13.45 ± 13.81 (78)
0 – 65.30
241.26 ± 307.12 (123)
0 – 2600
45.57 ± 28.89 (29)
9.22 – 151.64
Soluble reactive phosphorus
(μg L-1)
4.53 ± 5.16 (13)
0.71 – 15.55
2.29 ± 1.56 (9)
0.40 – 5.18
3.28 ± 1.44 (52)
0.51 – 66.54
13.95 ± 14.59 (28)
5.20 – 77.35
26.05 ± 27.18 (18)
7.06 – 107.14
Total organic carbon
(mg L-1)
0.79 ± 0.56 (11)
0.17 – 1.65
1.33 ± 0.66 (9)
0.56 – 2.42
2.43 ± 1.66 (51)
0.77 – 6.98
1.32 ± 0.38 (4)
1.02 – 1.86
8.92 ± 4.53 (14)
3.02 – 17.74
Dissolved organic carbon
(mg L-1)
0.47 ± 0.47 (24)
0 – 1.72
1.11 ± 0.64 (24)
0.26 – 2.69
1.92 ± 1.42 (77)
0.36 – 6.49
1.75 ± 0.82
1.03 – 3.56
7.46 ± 0.64
0.26 – 2.69
Specific conductance (μS) 15.8 ± 2.1 (22) 68.9 ± 5.9 (28) 105.8 ± 7.7 (87) 54.7 ± 6.9 (129) 71.8 ± 14.1 (98)
Juvenile salmonid density
(fish per square meter)
0.14 ± 0.08 (19) 0.20 ± 0.10 (11) 2.59 ± 5.70 (16) 3.71 ± 3.13 (16) 3.13 ± 4.04 (17)
Riparian plant foliar
δ15N (‰)
-4.11± 1.94 (74)
-5.83 – -3.73
-1.36 ± 1.05 (54)
-2.47 – 0.06
0.56 ± 1.48 (57)
-2.70 – 1.55
3.32±1.52 (74)
3.29 - 4.43
3.85 ± 2.20 (21)
1.38 - 5.58
Plants sampled for δ15N Co, E, G, D, Sa, W Co, G, D, W Bi, G, Bl, W(3), Co Ch, G, F, Se, N, W G, F, W