Details:

Journal Title:
Frontiers in Marine Science
Personal Author:
Klingbeil, William H. ; Montecinos, G. J. ; Alberto, Filipe
Klingbeil, William H. ; Montecinos, G. J. ; Alberto, Filipe Less -
Sea Grant Program:
CASG/CUIMR (California Sea Grant)
Description:
Given the impacts of climate change and other anthropogenic stressors on marine systems, there is a need to accurately predict how species respond to changing environments and disturbance regimes. The use of genetic tools to monitor temporal trends in populations gives ecologists the ability to estimate changes in genetic diversity and effective population size that may be undetectable by traditional census methods. Although multiple studies have used temporal genetic analysis, they usually involve commercially important species, and rarely sample before and after disturbance. In this study, we run a temporal analysis of giant kelp, Macrocystis pyrifera, genetic diversity over the scope of 10 years (2008-2018) using the same microsatellite marker panel to assess the genetic consequences of disturbance in several populations of giant kelp (Macrocystis pyrifera) in the Southern California Bight. The study is a rare pre- and post-disturbance microsatellite analysis that included declines to giant kelp caused by the 2015/16 El Nino Southern Oscillation event. We used canopy biomass estimated by remote sensing (Landsat) to quantify the extent of disturbance to kelp beds, and sea surface temperature data to understand how kelp was pushed towards its temperature limits during this period. Despite prolonged periods with decreased canopy at several sites, no changes in genetic structure and allelic richness were observed. We argue that giant kelp in the region is best described as a “patchy population” system where true extinctions are rare. We discuss how deep refugia of subsurface sporophytes and cryptic microscopic life stages could have kept genetic diversity through disturbance. Given the increasing effects of climate change and uncertainty in modeling impacts of species with cryptic life history stages, we suggest further investigation to reveal the role such stages play in species resilience. Genetic monitoring studies of sites selected by remote census demographic and climate surveys should be continued in the future given the predicted impacts of climate change.
Keywords:
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Aquatic Science Global And Planetary Change Ocean Engineering Oceanography Water Science And Technology
Source:
Frontiers in Marine Science, 9
DOI:
https://doi.org/10.3389/fmars.2022.947393
ISSN:
2296-7745
Format:
PDF
Publisher:
Frontiers Media SA
Document Type:
Journal Article
Funding:
Grant no. NA18OAR4170073
License:
https://creativecommons.org/licenses/by/4.0/
Rights Information:
CC BY
Compliance:
Submitted
Main Document Checksum:
[+]
urn:sha256:9fc5e5d1d97526ed5c471daf36e397d11437b47d245fb91ec5efa09d28f4ec4b
Download URL:
https://repository.library.noaa.gov/view/noaa/55345/noaa_55345_DS1.pdf
File Type:

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