Leaf Pack Experiment Details at Lower Wenatchee River
Placement Information

Placement Date March 22, 2021
Number of Packs Placed 2
Placement Air Temperature Unknown °C
Placement Water Temperature 6.4 °C
Stream Habitat Type Riffle
Leaf Pack Type and Composition

Predominant Leaf Species:

willow spp.
black cottonwood
siberian elm (invasive)


Retrieval Information

Retrieval Date April 22, 2021
Number of Packs Retrieved 2
Retrieval Air Temperature Unknown °C
Retrieval Water Temperature 8.0 °C
Storm and Non-Storm Events

Did storms occur while your leaf packs were in the stream? Yes
Number of storms that occurred 0
Total precipitation depth that occurred 0.0 cm
Did flooding occur? No
Was this site experiencing a drought during your experiment? No

Summary Analysis
Results Overview

Total Number of Individuals Found 129
Pollution Tolerance Index Score 14
Pollution Tolerance Index Rating Fair - Substantial pollution likely
Percent EPT 58.91%




Comments

Upstream property boundary; across from poison ivy mega patch. Substrate dominated by cobble, sand. Higher velocity flows; pulled before first spring runoff pulse.