Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae)
Abstract The worldwide effects of ocean acidification ( OA ) on marine species are a growing concern. In temperate coastal seas, seaweeds are dominant primary producers that create complex habitats and supply energy to higher trophic levels. Studies on OA and macroalgae have focused on calcifying sp...
Published in: | Global Change Biology |
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Online Access: | http://dx.doi.org/10.1111/j.1365-2486.2011.02594.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2011.02594.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2011.02594.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1365-2486.2011.02594.x |
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crwiley:10.1111/j.1365-2486.2011.02594.x 2024-06-23T07:55:50+00:00 Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae) Roleda, Michael Y. Morris, Jaz N. McGraw, Christina M. Hurd, Catriona L. Royal Society of New Zealand Marsden Fund New Zealand Foundation for Research Science & Technology 2011 http://dx.doi.org/10.1111/j.1365-2486.2011.02594.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2011.02594.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2011.02594.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1365-2486.2011.02594.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 18, issue 3, page 854-864 ISSN 1354-1013 1365-2486 journal-article 2011 crwiley https://doi.org/10.1111/j.1365-2486.2011.02594.x 2024-06-13T04:23:01Z Abstract The worldwide effects of ocean acidification ( OA ) on marine species are a growing concern. In temperate coastal seas, seaweeds are dominant primary producers that create complex habitats and supply energy to higher trophic levels. Studies on OA and macroalgae have focused on calcifying species and adult stages, but critically, they have overlooked the microscopic stages of the reproductive life cycle, which, for other anthropogenic stressors, e.g., UV ‐B radiation, are the most susceptible life‐history phase. Also, environmental cues and stressors can cause changes in the sex ratio, which has implications for the mating system and recruitment success. Here, we report the effects of pH (7.59–8.50) on meiospore germination and sex determination for the giant kelp, M acrocystis pyrifera ( L aminariales), in the presence and absence of additional dissolved inorganic carbon ( DIC ). Lowered pH (7.59–7.60, using HCl‐only) caused a significant reduction in germination, whereas added DIC had the opposite effect, indicating that increased CO 2 at lower pH ameliorates physiological stress. This finding also highlights the importance of appropriate manipulation of seawater carbonate chemistry when testing the effects of OA on photosynthetic organisms. The proportion of male to female gametophytes did not vary significantly between treatments, suggesting that pH was not a primary environmental modulator of sex. Relative to the baseline (pH 8.19), gametophytes were 32% larger under moderate OA (pH 7.86) and 10% larger under extreme OA (pH 7.61). We suggest that metabolically active cells can compensate for the acidification of seawater. This homeostatic function minimizes the negative effects of lower pH (high H + ions) on cellular activity. The 6–9% reduction in germination success under extreme OA suggests that meiospores of M . pyrifera may be resistant to future OA . Article in Journal/Newspaper Ocean acidification Wiley Online Library Global Change Biology 18 3 854 864 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The worldwide effects of ocean acidification ( OA ) on marine species are a growing concern. In temperate coastal seas, seaweeds are dominant primary producers that create complex habitats and supply energy to higher trophic levels. Studies on OA and macroalgae have focused on calcifying species and adult stages, but critically, they have overlooked the microscopic stages of the reproductive life cycle, which, for other anthropogenic stressors, e.g., UV ‐B radiation, are the most susceptible life‐history phase. Also, environmental cues and stressors can cause changes in the sex ratio, which has implications for the mating system and recruitment success. Here, we report the effects of pH (7.59–8.50) on meiospore germination and sex determination for the giant kelp, M acrocystis pyrifera ( L aminariales), in the presence and absence of additional dissolved inorganic carbon ( DIC ). Lowered pH (7.59–7.60, using HCl‐only) caused a significant reduction in germination, whereas added DIC had the opposite effect, indicating that increased CO 2 at lower pH ameliorates physiological stress. This finding also highlights the importance of appropriate manipulation of seawater carbonate chemistry when testing the effects of OA on photosynthetic organisms. The proportion of male to female gametophytes did not vary significantly between treatments, suggesting that pH was not a primary environmental modulator of sex. Relative to the baseline (pH 8.19), gametophytes were 32% larger under moderate OA (pH 7.86) and 10% larger under extreme OA (pH 7.61). We suggest that metabolically active cells can compensate for the acidification of seawater. This homeostatic function minimizes the negative effects of lower pH (high H + ions) on cellular activity. The 6–9% reduction in germination success under extreme OA suggests that meiospores of M . pyrifera may be resistant to future OA . |
author2 |
Royal Society of New Zealand Marsden Fund New Zealand Foundation for Research Science & Technology |
format |
Article in Journal/Newspaper |
author |
Roleda, Michael Y. Morris, Jaz N. McGraw, Christina M. Hurd, Catriona L. |
spellingShingle |
Roleda, Michael Y. Morris, Jaz N. McGraw, Christina M. Hurd, Catriona L. Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae) |
author_facet |
Roleda, Michael Y. Morris, Jaz N. McGraw, Christina M. Hurd, Catriona L. |
author_sort |
Roleda, Michael Y. |
title |
Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae) |
title_short |
Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae) |
title_full |
Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae) |
title_fullStr |
Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae) |
title_full_unstemmed |
Ocean acidification and seaweed reproduction: increased CO 2 ameliorates the negative effect of lowered pH on meiospore germination in the giant kelp Macrocystis pyrifera ( Laminariales, Phaeophyceae) |
title_sort |
ocean acidification and seaweed reproduction: increased co 2 ameliorates the negative effect of lowered ph on meiospore germination in the giant kelp macrocystis pyrifera ( laminariales, phaeophyceae) |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1111/j.1365-2486.2011.02594.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2011.02594.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2011.02594.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1365-2486.2011.02594.x |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Global Change Biology volume 18, issue 3, page 854-864 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2486.2011.02594.x |
container_title |
Global Change Biology |
container_volume |
18 |
container_issue |
3 |
container_start_page |
854 |
op_container_end_page |
864 |
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1802648571618525184 |