Spatial and Temporal Persistence of Nearshore Kelp Beds on the West Coast of British Columbia, Canada using Satellite Remote Sensing.
Presentation Abstract
Spatial and Temporal Persistence of Nearshore Kelp Beds on the West Coast of British Columbia, Canada using Satellite Remote Sensing. Sarah Schroeder, Leanna Boyer, Francis Juanes, Maycira Costa A time series of high-resolution satellite imagery from 2004-2017 was used to detect floating bull kelp (Nereocystis luetkeana) in the nearshore region of coastal British Columbia. Kelp persistence over time was calculated and the spatial trends relating to environmental conditions of substrate, temperature and currents were examined. Areas with both high currents and rocky substrate had the highest kelp extent and greatest persistence, while those regions with either low currents or gravel substrate had higher variability and lower kelp persistence. Temporal changes were compared to anomalies in sea surface temperatures and while no direct pattern of kelp loss was linked to temperature, a possible lag effect may have occurred where high temperatures in the previous year resulted in lower kelp presence the following season. Overall, a decline in kelp extent was measured from a high in 2015 to a low in 2017.
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_4201
Start Date
22-4-2020 10:30 AM
End Date
22-4-2020 12:00 PM
Genre/Form
conference proceedings; presentations (communicative events)
Subjects – Topical (LCSH)
Nereocystis luetkeana--Salish Sea (B.C. and Wash.); Kelps--Effect of temperature on--Salish Sea (B.C. and Wash.); Ecological disturbances--Salish Sea (B.C. and Wash.); Kelps--Mortality--Salish Sea (B.C. and Wash.)
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.
Type
Text
Language
English
Format
application/pdf
Spatial and Temporal Persistence of Nearshore Kelp Beds on the West Coast of British Columbia, Canada using Satellite Remote Sensing.
Spatial and Temporal Persistence of Nearshore Kelp Beds on the West Coast of British Columbia, Canada using Satellite Remote Sensing. Sarah Schroeder, Leanna Boyer, Francis Juanes, Maycira Costa A time series of high-resolution satellite imagery from 2004-2017 was used to detect floating bull kelp (Nereocystis luetkeana) in the nearshore region of coastal British Columbia. Kelp persistence over time was calculated and the spatial trends relating to environmental conditions of substrate, temperature and currents were examined. Areas with both high currents and rocky substrate had the highest kelp extent and greatest persistence, while those regions with either low currents or gravel substrate had higher variability and lower kelp persistence. Temporal changes were compared to anomalies in sea surface temperatures and while no direct pattern of kelp loss was linked to temperature, a possible lag effect may have occurred where high temperatures in the previous year resulted in lower kelp presence the following season. Overall, a decline in kelp extent was measured from a high in 2015 to a low in 2017.
