Table 5. Indicator values (IV) and p-values from Indicator Species Analysis (ISA) comparing reaches for each trait modality with a p-value < = 0.05 for A) Calapooia River and B) Rogue River.
A) Calapooia | C-US | C-DS | |||||||
Year | Trait | IV | p | Trait | IV | p | |||
2007 | poorly synchronized emergence | 67.4 | 0.0002 | well synchronized emergence | 60 | 0.0002 | |||
multivoltine | 89.3 | 0.0002 | univoltine | 59.5 | 0.0002 | ||||
swim (habit) | 87.8 | 0.0002 | no swim ability | 59.8 | 0.01 | ||||
collector-gatherers | 59.7 | 0.004 | herbivores | 63.1 | 0.0004 | ||||
drift absent | 61 | 0.01 | clingers | 53.6 | 0.004 | ||||
weak swim ability | 55.6 | 0.02 | good armoring | 74.5 | 0.03 | ||||
high crawl rate | 63.4 | 0.05 | |||||||
2008 | [none] | multivoltine | 59.5 | 0.04 | |||||
swim (habit) | 58.9 | 0.05 | |||||||
2009 | [none] | high crawl rate | 64.8 | 0.03 | |||||
B) Rogue | R-US | R-DS1 | R-DS2 | ||||||
Year | Trait | IV | p | Trait | IV | p | Trait | IV | p |
2008 | cool stenotherm | 53.3 | 0.03 | cold/warm eurytherm | 34.4 | 0.002 | [none] | ||
rare in drift | 55.4 | 0.005 | |||||||
high crawl rate | 48.4 | 0.01 | |||||||
long-lived | 47.3 | 0.05 | |||||||
semivoltine | 38.1 | 0.05 | |||||||
2009 | univoltine | 41 | 0.04 | multivoltine | 48.5 | 0.02 | [none] | ||
respiration with gills | 36.2 | 0.03 | poorly synchronized emergence | 53.4 | 0.01 | ||||
no armoring | 36 | 0.05 | swim (habit) | 49.8 | 0.01 | ||||
weak flight | 35.9 | 0.02 | streamlined shape | 48.1 | 0.04 | ||||
2010 | semivoltine | 46 | 0.03 | multivoltine | 45.1 | 0.05 | |||
poor armoring | 45.9 | 0.03 | |||||||
nonseasonal development | 45.9 | 0.03 | fast-seasonal development | 36.1 | 0.008 | ||||
2011 | [none] | [none] | [none] |
Indicator trait modalities are organized into upstream and downstream reach columns by year-defined rows. Significant p-values following a correction for multiple comparisons are indicated in bold.