Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions
Climate change is affecting marine ecosystems in many ways, including raising temperatures and leading to ocean acidification. From 2014 to 2016, an extensive marine heat wave extended along the west coast of North America and had devastating effects on numerous species, including bull kelp (Nereocy...
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2023
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ftcdlib:oai:escholarship.org:ark:/13030/qt0nr7w8jw 2024-01-14T10:09:35+01:00 Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions Korabik, Angela R Winquist, Tallulah Grosholz, Edwin D Hollarsmith, Jordan A 989 - 1004 2023-10-01 application/pdf https://escholarship.org/uc/item/0nr7w8jw unknown eScholarship, University of California qt0nr7w8jw https://escholarship.org/uc/item/0nr7w8jw CC-BY-NC Journal of Phycology, vol 59, iss 5 Plant Biology Agricultural Veterinary and Food Sciences Fisheries Sciences Biological Sciences Life Below Water Climate Action Humans Kelp Ecosystem Seawater Climate Change Hydrogen-Ion Concentration Phaeophyta bull kelp kelp forests marine heat waves ocean acidification reproduction Marine Biology & Hydrobiology article 2023 ftcdlib 2023-12-18T19:06:03Z Climate change is affecting marine ecosystems in many ways, including raising temperatures and leading to ocean acidification. From 2014 to 2016, an extensive marine heat wave extended along the west coast of North America and had devastating effects on numerous species, including bull kelp (Nereocystis luetkeana). Bull kelp is an important foundation species in coastal ecosystems and can be affected by marine heat waves and ocean acidification; however, the impacts have not been investigated on sensitive early life stages. To determine the effects of changing temperatures and carbonate levels on Northern California's bull kelp populations, we collected sporophylls from mature bull kelp individuals in Point Arena, CA. At the Bodega Marine Laboratory, we released spores from field-collected bull kelp, and cultured microscopic gametophytes in a common garden experiment with a fully factorial design crossing modern conditions (11.63 ± 0.54°C and pH 7.93 ± 0.26) with observed extreme climate conditions (15.56 ± 0.83°C and 7.64 ± 0.32 pH). Our results indicated that both increased temperature and decreased pH influenced growth and egg production of bull kelp microscopic stages. Increased temperature resulted in decreased gametophyte survival and offspring production. In contrast, decreased pH had less of an effect but resulted in increased gametophyte survival and offspring production. Additionally, increased temperature significantly impacted reproductive timing by causing female gametophytes to produce offspring earlier than under ambient temperature conditions. Our findings can inform better predictions of the impacts of climate change on coastal ecosystems and provide key insights into environmental dynamics regulating the bull kelp lifecycle. Article in Journal/Newspaper Ocean acidification University of California: eScholarship |
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Open Polar |
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University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Plant Biology Agricultural Veterinary and Food Sciences Fisheries Sciences Biological Sciences Life Below Water Climate Action Humans Kelp Ecosystem Seawater Climate Change Hydrogen-Ion Concentration Phaeophyta bull kelp kelp forests marine heat waves ocean acidification reproduction Marine Biology & Hydrobiology |
spellingShingle |
Plant Biology Agricultural Veterinary and Food Sciences Fisheries Sciences Biological Sciences Life Below Water Climate Action Humans Kelp Ecosystem Seawater Climate Change Hydrogen-Ion Concentration Phaeophyta bull kelp kelp forests marine heat waves ocean acidification reproduction Marine Biology & Hydrobiology Korabik, Angela R Winquist, Tallulah Grosholz, Edwin D Hollarsmith, Jordan A Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions |
topic_facet |
Plant Biology Agricultural Veterinary and Food Sciences Fisheries Sciences Biological Sciences Life Below Water Climate Action Humans Kelp Ecosystem Seawater Climate Change Hydrogen-Ion Concentration Phaeophyta bull kelp kelp forests marine heat waves ocean acidification reproduction Marine Biology & Hydrobiology |
description |
Climate change is affecting marine ecosystems in many ways, including raising temperatures and leading to ocean acidification. From 2014 to 2016, an extensive marine heat wave extended along the west coast of North America and had devastating effects on numerous species, including bull kelp (Nereocystis luetkeana). Bull kelp is an important foundation species in coastal ecosystems and can be affected by marine heat waves and ocean acidification; however, the impacts have not been investigated on sensitive early life stages. To determine the effects of changing temperatures and carbonate levels on Northern California's bull kelp populations, we collected sporophylls from mature bull kelp individuals in Point Arena, CA. At the Bodega Marine Laboratory, we released spores from field-collected bull kelp, and cultured microscopic gametophytes in a common garden experiment with a fully factorial design crossing modern conditions (11.63 ± 0.54°C and pH 7.93 ± 0.26) with observed extreme climate conditions (15.56 ± 0.83°C and 7.64 ± 0.32 pH). Our results indicated that both increased temperature and decreased pH influenced growth and egg production of bull kelp microscopic stages. Increased temperature resulted in decreased gametophyte survival and offspring production. In contrast, decreased pH had less of an effect but resulted in increased gametophyte survival and offspring production. Additionally, increased temperature significantly impacted reproductive timing by causing female gametophytes to produce offspring earlier than under ambient temperature conditions. Our findings can inform better predictions of the impacts of climate change on coastal ecosystems and provide key insights into environmental dynamics regulating the bull kelp lifecycle. |
format |
Article in Journal/Newspaper |
author |
Korabik, Angela R Winquist, Tallulah Grosholz, Edwin D Hollarsmith, Jordan A |
author_facet |
Korabik, Angela R Winquist, Tallulah Grosholz, Edwin D Hollarsmith, Jordan A |
author_sort |
Korabik, Angela R |
title |
Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions |
title_short |
Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions |
title_full |
Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions |
title_fullStr |
Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions |
title_full_unstemmed |
Examining the reproductive success of bull kelp (Nereocystis luetkeana, Phaeophyceae, Laminariales) in climate change conditions |
title_sort |
examining the reproductive success of bull kelp (nereocystis luetkeana, phaeophyceae, laminariales) in climate change conditions |
publisher |
eScholarship, University of California |
publishDate |
2023 |
url |
https://escholarship.org/uc/item/0nr7w8jw |
op_coverage |
989 - 1004 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Journal of Phycology, vol 59, iss 5 |
op_relation |
qt0nr7w8jw https://escholarship.org/uc/item/0nr7w8jw |
op_rights |
CC-BY-NC |
_version_ |
1788064130722168832 |