DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf
Introduction The coastal macroalgal genus, Ulva, is found worldwide and is considered a nuisance algal genus due to its propensity for forming vast blooms. The response of Ulva to ocean acidification (OA) is of concern, particularly with nutrient enrichment, as these combined drivers may enhance alg...
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ftunivfreestate:oai:figshare.com:article/21738470 2023-05-15T17:52:05+02:00 DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf Leah B. Reidenbach (4620856) Steve R. Dudgeon (14268215) Janet E. Kübler (14268218) 2022-12-16T04:27:44Z https://doi.org/10.3389/fmars.2022.980657.s001 unknown https://figshare.com/articles/dataset/DataSheet_1_Ocean_acidification_and_ammonium_enrichment_interact_to_stimulate_a_short-term_spike_in_growth_rate_of_a_bloom_forming_macroalga_pdf/21738470 doi:10.3389/fmars.2022.980657.s001 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering carbon metabolism growth macroalgal physiology nitrogen metabolism nutrient enrichment ocean acidfication photosynthesis Ulva Dataset 2022 ftunivfreestate https://doi.org/10.3389/fmars.2022.980657.s001 2022-12-23T00:39:29Z Introduction The coastal macroalgal genus, Ulva, is found worldwide and is considered a nuisance algal genus due to its propensity for forming vast blooms. The response of Ulva to ocean acidification (OA) is of concern, particularly with nutrient enrichment, as these combined drivers may enhance algal blooms because of increased availability of dissolved inorganic resources. Methods We determined how a suite of physiological parameters were affected by OA and ammonium (NH 4 + ) enrichment in 22-day laboratory experiments to gain a mechanistic understanding of growth, nutrient assimilation, and photosynthetic processes. We predicted how physiological parameters change across a range of pCO 2 and NH 4 + scenarios to ascertain bloom potential under future climate change regimes. Results During the first five days of growth, there was a positive synergy between pCO 2 and NH 4 + enrichment, which could accelerate initiation of an Ulva bloom. After day 5, growth rates declined overall and there was no effect of pCO 2 , NH 4 + , nor their interaction. pCO 2 and NH 4 + acted synergistically to increase NO 3 - uptake rates, which may have contributed to increased growth in the first five days. Under the saturating photosynthetically active radiation (PAR) used in this experiment (500 μmol photon m -2 s -1 ), maximum photosynthetic rates were negatively affected by increased pCO 2, which could be due to increased sensitivity to light when high CO 2 reduces energy requirements for inorganic carbon acquisition. Activity of CCMs decreased under high pCO 2 and high NH 4 + conditions indicating that nutrients play a role in alleviating photodamage and regulating CCMs under high-light intensities. Discussion This study demonstrates that OA could play a role in initiating or enhancing Ulva blooms in a eutrophic environment and highlights the need for understanding the potential interactions among light, OA, and nutrient enrichment in regulating photosynthetic processes. Dataset Ocean acidification KovsieScholar Repository (University of the Free State - UFS UV) |
institution |
Open Polar |
collection |
KovsieScholar Repository (University of the Free State - UFS UV) |
op_collection_id |
ftunivfreestate |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering carbon metabolism growth macroalgal physiology nitrogen metabolism nutrient enrichment ocean acidfication photosynthesis Ulva |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering carbon metabolism growth macroalgal physiology nitrogen metabolism nutrient enrichment ocean acidfication photosynthesis Ulva Leah B. Reidenbach (4620856) Steve R. Dudgeon (14268215) Janet E. Kübler (14268218) DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering carbon metabolism growth macroalgal physiology nitrogen metabolism nutrient enrichment ocean acidfication photosynthesis Ulva |
description |
Introduction The coastal macroalgal genus, Ulva, is found worldwide and is considered a nuisance algal genus due to its propensity for forming vast blooms. The response of Ulva to ocean acidification (OA) is of concern, particularly with nutrient enrichment, as these combined drivers may enhance algal blooms because of increased availability of dissolved inorganic resources. Methods We determined how a suite of physiological parameters were affected by OA and ammonium (NH 4 + ) enrichment in 22-day laboratory experiments to gain a mechanistic understanding of growth, nutrient assimilation, and photosynthetic processes. We predicted how physiological parameters change across a range of pCO 2 and NH 4 + scenarios to ascertain bloom potential under future climate change regimes. Results During the first five days of growth, there was a positive synergy between pCO 2 and NH 4 + enrichment, which could accelerate initiation of an Ulva bloom. After day 5, growth rates declined overall and there was no effect of pCO 2 , NH 4 + , nor their interaction. pCO 2 and NH 4 + acted synergistically to increase NO 3 - uptake rates, which may have contributed to increased growth in the first five days. Under the saturating photosynthetically active radiation (PAR) used in this experiment (500 μmol photon m -2 s -1 ), maximum photosynthetic rates were negatively affected by increased pCO 2, which could be due to increased sensitivity to light when high CO 2 reduces energy requirements for inorganic carbon acquisition. Activity of CCMs decreased under high pCO 2 and high NH 4 + conditions indicating that nutrients play a role in alleviating photodamage and regulating CCMs under high-light intensities. Discussion This study demonstrates that OA could play a role in initiating or enhancing Ulva blooms in a eutrophic environment and highlights the need for understanding the potential interactions among light, OA, and nutrient enrichment in regulating photosynthetic processes. |
format |
Dataset |
author |
Leah B. Reidenbach (4620856) Steve R. Dudgeon (14268215) Janet E. Kübler (14268218) |
author_facet |
Leah B. Reidenbach (4620856) Steve R. Dudgeon (14268215) Janet E. Kübler (14268218) |
author_sort |
Leah B. Reidenbach (4620856) |
title |
DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf |
title_short |
DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf |
title_full |
DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf |
title_fullStr |
DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf |
title_full_unstemmed |
DataSheet_1_Ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf |
title_sort |
datasheet_1_ocean acidification and ammonium enrichment interact to stimulate a short-term spike in growth rate of a bloom forming macroalga.pdf |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.980657.s001 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://figshare.com/articles/dataset/DataSheet_1_Ocean_acidification_and_ammonium_enrichment_interact_to_stimulate_a_short-term_spike_in_growth_rate_of_a_bloom_forming_macroalga_pdf/21738470 doi:10.3389/fmars.2022.980657.s001 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.980657.s001 |
_version_ |
1766159423216025600 |