The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps
Climate change represents a threat to coastal marine ecosystems through variable effects on community structure and function due to increasing mean sea-surface temperatures (SST), marine heatwaves, variation in salinity, and ocean acidification. Among the most at risk species are California kelps, w...
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ftcdlib:oai:escholarship.org:ark:/13030/qt21k4j1tw 2024-01-07T09:45:43+01:00 The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps Korabik, Angela Rose Grosholz, Edwin D 2023-01-01 application/pdf https://escholarship.org/uc/item/21k4j1tw en eng eScholarship, University of California qt21k4j1tw https://escholarship.org/uc/item/21k4j1tw public Ecology Plant sciences Physiology climate change kelp macroalgae pH salinity temperature etd 2023 ftcdlib 2023-12-11T19:07:42Z Climate change represents a threat to coastal marine ecosystems through variable effects on community structure and function due to increasing mean sea-surface temperatures (SST), marine heatwaves, variation in salinity, and ocean acidification. Among the most at risk species are California kelps, which have already experienced significant die-offs over the past several years as a result of elevated SST and urchin grazing. However, the effects of these stresses on the very sensitive microscopic kelp life stage (gametophyte) are much less understood. Gametophytes are generally less resilient to changes in abiotic conditions, so global environmental change could result in drastic changes in kelp forest community structure and composition via impacts on this life stage. My dissertation research used manipulative laboratory experiments to investigate the interacting role of abiotic stressors on kelp reproduction and community compositions, specifically, the growth and survival of early kelp life stages. My first chapter focused on the effects of climate-driven temperature increases and ocean acidification on bull kelp (Nereocystis luetkeana) gametophytes from Point Arena, CA (Korabik et al. 2023). From 2014 to 2016, the largest marine heatwave in history appeared off the coast of California resulting in large kelp die off events. In this chapter, I asked how increased temperature and lowered pH impact the survival of bull kelp gametophytes and the production of juvenile bull kelp sporophytes. My results showed that increased temperature resulted in a significant decrease in the survival of gametophytes and a lower number of juveniles produced, whereas lowered pH only had a significant effect on the production of juveniles, slowing their rate of development. These results indicate that the predicted increase of marine heatwaves could have devastating effects on the persistence of bull kelp forest ecosystems. My second chapter considered the interacting effects of climate driven changes in temperature and salinity and ... Thesis Ocean acidification University of California: eScholarship |
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Open Polar |
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University of California: eScholarship |
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English |
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Ecology Plant sciences Physiology climate change kelp macroalgae pH salinity temperature |
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Ecology Plant sciences Physiology climate change kelp macroalgae pH salinity temperature Korabik, Angela Rose The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps |
topic_facet |
Ecology Plant sciences Physiology climate change kelp macroalgae pH salinity temperature |
description |
Climate change represents a threat to coastal marine ecosystems through variable effects on community structure and function due to increasing mean sea-surface temperatures (SST), marine heatwaves, variation in salinity, and ocean acidification. Among the most at risk species are California kelps, which have already experienced significant die-offs over the past several years as a result of elevated SST and urchin grazing. However, the effects of these stresses on the very sensitive microscopic kelp life stage (gametophyte) are much less understood. Gametophytes are generally less resilient to changes in abiotic conditions, so global environmental change could result in drastic changes in kelp forest community structure and composition via impacts on this life stage. My dissertation research used manipulative laboratory experiments to investigate the interacting role of abiotic stressors on kelp reproduction and community compositions, specifically, the growth and survival of early kelp life stages. My first chapter focused on the effects of climate-driven temperature increases and ocean acidification on bull kelp (Nereocystis luetkeana) gametophytes from Point Arena, CA (Korabik et al. 2023). From 2014 to 2016, the largest marine heatwave in history appeared off the coast of California resulting in large kelp die off events. In this chapter, I asked how increased temperature and lowered pH impact the survival of bull kelp gametophytes and the production of juvenile bull kelp sporophytes. My results showed that increased temperature resulted in a significant decrease in the survival of gametophytes and a lower number of juveniles produced, whereas lowered pH only had a significant effect on the production of juveniles, slowing their rate of development. These results indicate that the predicted increase of marine heatwaves could have devastating effects on the persistence of bull kelp forest ecosystems. My second chapter considered the interacting effects of climate driven changes in temperature and salinity and ... |
author2 |
Grosholz, Edwin D |
format |
Thesis |
author |
Korabik, Angela Rose |
author_facet |
Korabik, Angela Rose |
author_sort |
Korabik, Angela Rose |
title |
The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps |
title_short |
The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps |
title_full |
The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps |
title_fullStr |
The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps |
title_full_unstemmed |
The Impacts of Climate Change on the Reproduction of Native and Invasive Kelps |
title_sort |
impacts of climate change on the reproduction of native and invasive kelps |
publisher |
eScholarship, University of California |
publishDate |
2023 |
url |
https://escholarship.org/uc/item/21k4j1tw |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
qt21k4j1tw https://escholarship.org/uc/item/21k4j1tw |
op_rights |
public |
_version_ |
1787427304650047488 |