Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming
The frequency of short-term oceanic warming events [“marine heatwaves” (MHWs) or heat spikes] has increased over the past century and is projected to further increase because of anthropogenic climate change. Given that marine organisms are strongly influenced by temperature, an increased occurrence...
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ftdoajarticles:oai:doaj.org/article:9151f1698b9a4eb6a37a130787e7acbb 2023-05-15T17:41:42+02:00 Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming Heidi L. Burdett Honor Wright Dan A. Smale 2019-08-01T00:00:00Z https://doi.org/10.3389/fmars.2019.00516 https://doaj.org/article/9151f1698b9a4eb6a37a130787e7acbb EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2019.00516/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00516 https://doaj.org/article/9151f1698b9a4eb6a37a130787e7acbb Frontiers in Marine Science, Vol 6 (2019) kelp photophysiology PAM fluorescence marine heatwave Laminaria digitata Laminaria hyperborea Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2019 ftdoajarticles https://doi.org/10.3389/fmars.2019.00516 2022-12-31T03:43:57Z The frequency of short-term oceanic warming events [“marine heatwaves” (MHWs) or heat spikes] has increased over the past century and is projected to further increase because of anthropogenic climate change. Given that marine organisms are strongly influenced by temperature, an increased occurrence of warming events could alter the structure of populations, communities, and ecosystems. The distribution and ecophysiological performance of kelp species – globally important foundation species that play significant roles in nutrient cycling and habitat creation in temperate coastal systems – is particularly constrained by temperature. However, their photophysiological responses to warming events remains unclear, which hinders attempts to understand, and predict the effects of ocean warming on kelp populations and the ecosystems they underpin. Here, we experimentally simulated a heat spike (+2°C and +4°C in magnitude, 3 days in duration, and compared with ambient controls) and examined the photophysiological responses of two canopy-forming kelp species widely distributed across the northeast Atlantic – Laminaria digitata and Laminaria hyperborea. Both species were resilient to the realistic warming treatments in terms of their photosynthetic characteristics. However, we found that L. digitata individuals, which were collected from populations found toward the upper limit of this species’ thermal range, exhibited increased oxygen production at higher temperatures, particularly after multiple days of exposure to the warming event. L. digitata also exhibited a greater poise for dissipating excess energy through non-photochemical pathways. In contrast, L. hyperborea, which extends further south into warmer waters and tends to occupy deeper reefs that are almost constantly submerged, appeared to be photo-physiologically insensitive to the heat spike. This study enhances our mechanistic understanding of the photophysiological and photoprotective responses of kelps to short-term acute warming events – features which are ... Article in Journal/Newspaper Northeast Atlantic Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
kelp photophysiology PAM fluorescence marine heatwave Laminaria digitata Laminaria hyperborea Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
kelp photophysiology PAM fluorescence marine heatwave Laminaria digitata Laminaria hyperborea Science Q General. Including nature conservation geographical distribution QH1-199.5 Heidi L. Burdett Honor Wright Dan A. Smale Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming |
topic_facet |
kelp photophysiology PAM fluorescence marine heatwave Laminaria digitata Laminaria hyperborea Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The frequency of short-term oceanic warming events [“marine heatwaves” (MHWs) or heat spikes] has increased over the past century and is projected to further increase because of anthropogenic climate change. Given that marine organisms are strongly influenced by temperature, an increased occurrence of warming events could alter the structure of populations, communities, and ecosystems. The distribution and ecophysiological performance of kelp species – globally important foundation species that play significant roles in nutrient cycling and habitat creation in temperate coastal systems – is particularly constrained by temperature. However, their photophysiological responses to warming events remains unclear, which hinders attempts to understand, and predict the effects of ocean warming on kelp populations and the ecosystems they underpin. Here, we experimentally simulated a heat spike (+2°C and +4°C in magnitude, 3 days in duration, and compared with ambient controls) and examined the photophysiological responses of two canopy-forming kelp species widely distributed across the northeast Atlantic – Laminaria digitata and Laminaria hyperborea. Both species were resilient to the realistic warming treatments in terms of their photosynthetic characteristics. However, we found that L. digitata individuals, which were collected from populations found toward the upper limit of this species’ thermal range, exhibited increased oxygen production at higher temperatures, particularly after multiple days of exposure to the warming event. L. digitata also exhibited a greater poise for dissipating excess energy through non-photochemical pathways. In contrast, L. hyperborea, which extends further south into warmer waters and tends to occupy deeper reefs that are almost constantly submerged, appeared to be photo-physiologically insensitive to the heat spike. This study enhances our mechanistic understanding of the photophysiological and photoprotective responses of kelps to short-term acute warming events – features which are ... |
format |
Article in Journal/Newspaper |
author |
Heidi L. Burdett Honor Wright Dan A. Smale |
author_facet |
Heidi L. Burdett Honor Wright Dan A. Smale |
author_sort |
Heidi L. Burdett |
title |
Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming |
title_short |
Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming |
title_full |
Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming |
title_fullStr |
Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming |
title_full_unstemmed |
Photophysiological Responses of Canopy-Forming Kelp Species to Short-Term Acute Warming |
title_sort |
photophysiological responses of canopy-forming kelp species to short-term acute warming |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmars.2019.00516 https://doaj.org/article/9151f1698b9a4eb6a37a130787e7acbb |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Frontiers in Marine Science, Vol 6 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2019.00516/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00516 https://doaj.org/article/9151f1698b9a4eb6a37a130787e7acbb |
op_doi |
https://doi.org/10.3389/fmars.2019.00516 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
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1766143410450726912 |