Title:

Trask River Watershed Study: Benthic macroinvertebrate sampling, 2006-2016

Author(s):

Johnson, Sherri L.; Li, Judith L.; Sobota, Janel Banks; Gerth, William J.

Publication Year:

2022

How to Cite:

These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Johnson, Sherri L.; Li, Judith L.; Sobota, Janel Banks; Gerth, William J. 2022. Trask River Watershed Study: Benthic macroinvertebrate sampling, 2006-2016. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2022-0005

Abstract:

These data are a portion of the larger Trask River Watershed Study which was conducted in the East Fork of the South Fork Trask River of the Coast Range of western Oregon. Basin-wide surveys of benthic macroinvertebrate communities were conducted over the course of this study (2006-2016). Benthic samples were collected in early spring, early summer and late summer using a Surber net (500 micron mesh). This macroinvertebrate sampling was conducted before and after forest harvest and in reference watersheds to provide insights into both local and downstream effects. Specifically, these data from headwaters and downstream sites include biomass, density, and functional feeding group (FFG) densities of aquatic macroinvertebrates and rate of emergence of adult aquatic macroinvertebrates.

The Trask River Watershed study area consists of 4 large catchments: Pothole Creek, Gus Creek, Rock Creek, and Upper Main Trask. Within each of the four catchments, 2-4 headwater sites and a downstream site were sampled. In general, Trask River Watershed study data were collected during pre-harvest (2006-2011) and post-harvest (2013-2016) periods, from treated and reference headwater watersheds and from downstream sites. Beginning in 2007, one downstream site in each catchment was sampled using Surber samplers twice per year, in early summer and during late summer. Within each catchment, 3 headwater streams were consistently sampled each year in early summer. Springtime sampling occurred in some years. In the Pothole basin, a 4th headwater site (PH1) was added in 2010. These macroinvertebrate samples were analyzed for taxonomic composition and densities. Benthic macroinvertebrates were identified to the lowest practical taxonomic level, typically genus, although some individuals could only be consistently keyed to the subfamily, family or order level. Starting in 2009, benthic samples were preserved by freezing, then thawed and macroinvertebrates sorted from organic and inorganic material. These macroinvertebrates were dried and ashed to calculate bulk biomass. Biomass was not measured for individual taxa. Emergence rates of adult aquatic macroinvertebrates were measured for a subset of headwater sites from June through mid-August in 2009-2010 (pre-treatment) and 2013-2014 (post-treatment). These adult specimen were also identified to the lowest practical taxonomic level after collection and preservation.

Keywords:

benthic macroinvertebrates; aquatic invertebrates; forest-stream interactions; aquatic ecosystems; streams; adult emergence; taxonomy; headwater basin; downstream sites; biota; environment; inlandWaters; Ecology, Ecosystems, & Environment; Hydrology, watersheds, sedimentation; Forest & Plant Health; Air, soil, water pollution (environmental injury); Inventory, Monitoring, & Analysis; Assessments; Biometrics; Monitoring; Wildlife (or Fauna); Invertebrates; Oregon; Trask River; Trask basin study area

Related publications:

• Johnson, Sherri L.; Li, Judith L.; Sobota, Janel B.; Ashkenas, Linda R.; Pollock, Amanda M.; Meleason, Mark A.; Ganio, Lisa. 2022. Macroinvertebrate responses to differing riparian treatments following forest harvest in the headwaters of Trask River watershed. Forest Ecology and Management. 508: 119999. https://doi.org/10.1016/j.foreco.2021.119999
• Johnson, Sherri L.; Ashkenas, Linda R. 2022. Trask River Watershed Study: Epilithic algal biomass and chlorophyll a concentrations, 2006-2016. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2022-0001
• Johnson, Sherri L.; Ashkenas, Linda R. 2022. Trask River Watershed Study: Stream chemistry, 2006-2016. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2022-0002
• More (6 total)

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