Event Title

Assessing understory kelp dynamics with a nine year scuba survey time series

Streaming Media

Presentation Abstract

Understory kelp species are an important component of Salish Sea nearshore ecosystems, yet much less is known about their dynamics and current status than for canopy forming species. In other regions, kelp dynamics are often tracked with SCUBA-based monitoring programs which allow collection of high-resolution species abundance and distribution data, and related information on co-occurring species and environmental conditions. These programs provide excellent methodological starting points but require tailoring to local conditions and research questions. Since 2011, we have used a modified version of the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) protocol to sample kelp and other benthic organisms at 17 sites in the central Strait of Juan de Fuca annually, with the goal of evaluating response during and after removal of two dams from the Elwha River. Here we explore what these data tell us about kelp response to three major stressors that occurred over this time period: dam removal, extreme climate conditions, and sea star wasting syndrome. We also use these data to explore the utility of this technique for conducting understory kelp monitoring. Questions include: What levels of change are detectable? How can effects of physical covariates, including stressors, be assessed? How can biological interactions of competition, grazing, and trophic cascades be assessed? If we were starting over, how would we change our methods and design? Our intent is to provide recommendations to help guide future monitoring efforts.

Session Title

Session 2.1A: Kelp: Stressors, Trends, and Value (Part I)

Conference Track

Kelp & Seagrass

Conference Name

Salish Sea Ecosystem Conference (2020 : Online)

Document Type

Event

SSEC Identifier

2020_abstractID_4539

Start Date

22-4-2020 10:30 AM

End Date

22-4-2020 12:00 PM

Geographic Coverage

Salish Sea (B.C. and Wash.)

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.

Language

English

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Apr 22nd, 10:30 AM Apr 22nd, 12:00 PM

Assessing understory kelp dynamics with a nine year scuba survey time series

Understory kelp species are an important component of Salish Sea nearshore ecosystems, yet much less is known about their dynamics and current status than for canopy forming species. In other regions, kelp dynamics are often tracked with SCUBA-based monitoring programs which allow collection of high-resolution species abundance and distribution data, and related information on co-occurring species and environmental conditions. These programs provide excellent methodological starting points but require tailoring to local conditions and research questions. Since 2011, we have used a modified version of the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) protocol to sample kelp and other benthic organisms at 17 sites in the central Strait of Juan de Fuca annually, with the goal of evaluating response during and after removal of two dams from the Elwha River. Here we explore what these data tell us about kelp response to three major stressors that occurred over this time period: dam removal, extreme climate conditions, and sea star wasting syndrome. We also use these data to explore the utility of this technique for conducting understory kelp monitoring. Questions include: What levels of change are detectable? How can effects of physical covariates, including stressors, be assessed? How can biological interactions of competition, grazing, and trophic cascades be assessed? If we were starting over, how would we change our methods and design? Our intent is to provide recommendations to help guide future monitoring efforts.