Ecological Archives E096-109-A2

J. Bruce Wallace, Susan L. Eggert, Judy L. Meyer, and Jackson R. Webster. 2015. Stream invertebrate productivity linked to forest subsidies: 37 stream-years of reference and experimental data. Ecology 96:12131228. http://dx.doi.org/10.1890/14-1589.1

Appendix B. RIA results of functional feeding group abundance and biomass comparisons between Catchments 53 and 55.

Table B1. RIA results for differences between reference and treatment streams for mean monthly abundance (number/m²) and biomass (mg AFDM/m²) of functional feeding groups during litter exclusion (including wood removal and PVC addition) and leaf addition periods (for fast, slow, and mixed leaf species), where n = number of months of benthic data included in analyses. Values are given for both mixed substrates and rock face substrates.

Abundance

Litter Exclusion and Wood Removal Periods (n = 108)

 

Mixed substrate

Rockface

Shredders

p < 0.0001

p = 0.249

Scrapers

p = 0.083

p = 0.354

Gatherers

p = 0.019

p = 0.165

Filterers

p = 0.058

p = 0.561

Predators

p = 0.007

p = 0.933

Total

p = 0.005

p = 0.196

 

 Leaf Addition Period (n = 72)

 

Mixed substrate

Rockface

Shredders

p = 0.059

p = 0.122

Scrapers

p < 0.0001

p = 0.996

Gatherers

p = 0.030

p = 0.067

Filterers

p = 0.662

p = 0.323

Predators

p = 0.022

p = 0.388

Total

p = 0.010

p = 0.115

 

 

 

Biomass

 Litter Exclusion and Wood Removal Periods (n = 108)

 

Mixed substrate

Rockface

Shredders

p = 0.046

p = 0.784

Scrapers

p = 0.849

p = 0.030

Gatherers

p = 0.019

p = 0.002

Filterers

p < 0.0001

p = 0.874

Predators

p < 0.0001

p = 0.500

Total

p = 0.003

p = 0.193

 

Leaf Addition Period (n = 72)

 

Mixed substrate

Rockface

Shredders

p = 0.028

p = 0.636

Scrapers

p = 0.947

p = 0.157

Gatherers

p = 0.479

p = 0.410

Filterers

p = 0.020

p = 0.916

Predators

p = 0.004

p = 0.701

Total

p < 0.0001

p = 0.633


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