Impact of elevated pH on succession in the Arctic spring bloom
The development of pH during the spring bloom in 2011 and 2012 was investigated in Disko Bay, West Greenland. During the spring phytoplankton bloom pH reached 8.5 at the peak of the bloom. Subsequently, the pH decreased to 7.5. Microcosm experiments were conducted on natural assemblages sampled at t...
Published in: | Marine Ecology Progress Series |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2015
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/e2c44a77-9175-46ce-8e31-c437c98ade8a https://doi.org/10.3354/meps11296 https://backend.orbit.dtu.dk/ws/files/112087630/Publishers_version.pdf |
id |
ftdtupubl:oai:pure.atira.dk:publications/e2c44a77-9175-46ce-8e31-c437c98ade8a |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/e2c44a77-9175-46ce-8e31-c437c98ade8a 2024-05-19T07:33:05+00:00 Impact of elevated pH on succession in the Arctic spring bloom Riisgaard, Karen Nielsen, Torkel Gissel Hansen, Per Juel 2015 application/pdf https://orbit.dtu.dk/en/publications/e2c44a77-9175-46ce-8e31-c437c98ade8a https://doi.org/10.3354/meps11296 https://backend.orbit.dtu.dk/ws/files/112087630/Publishers_version.pdf eng eng https://orbit.dtu.dk/en/publications/e2c44a77-9175-46ce-8e31-c437c98ade8a info:eu-repo/semantics/openAccess Riisgaard , K , Nielsen , T G & Hansen , P J 2015 , ' Impact of elevated pH on succession in the Arctic spring bloom ' , Marine Ecology Progress Series , vol. 530 , pp. 63-75 . https://doi.org/10.3354/meps11296 article 2015 ftdtupubl https://doi.org/10.3354/meps11296 2024-05-01T00:21:07Z The development of pH during the spring bloom in 2011 and 2012 was investigated in Disko Bay, West Greenland. During the spring phytoplankton bloom pH reached 8.5 at the peak of the bloom. Subsequently, the pH decreased to 7.5. Microcosm experiments were conducted on natural assemblages sampled at the initiation of the spring bloom each year and manipulated to cover pH levels in the range of 8.0-9.5 to test the immediate tolerance of Arctic protist plankton to elevated pH under nutrient-limiting (2011) and nutrient-rich conditions (2012). The most pronounced effect of elevated pH was found for heterotrophic protists, whereas phytoplankton proved more robust. Two out of three heterotrophic protist species were significantly affected if pH increased above 8.5, and all heterotrophic protists had disappeared at pH 9.5. Based on Chl a measurements from the two sets of experiments, phytoplankton community growth was significantly reduced at pH 9.5 during nutrient-rich conditions, while pH had little impact on nutrient-limited phytoplankton growth. The results were supported by cell counts that revealed that phytoplankton growth during nutrient-rich conditions was significantly reduced from an average of 0.49 d-1 at pH 8.0 to an average of 0.27 d-1 at pH 9.5. In comparison, only one out of four tested phytoplankton species were significantly affected by elevated pH under nutrient-limited conditions. Sudden pH fluctuations, such as those occurring during phytoplankton blooms, will most likely favour pH-tolerant species, such as diatoms. Article in Journal/Newspaper Arctic Arctic Disko Bay Greenland Phytoplankton Technical University of Denmark: DTU Orbit Marine Ecology Progress Series 530 63 75 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
The development of pH during the spring bloom in 2011 and 2012 was investigated in Disko Bay, West Greenland. During the spring phytoplankton bloom pH reached 8.5 at the peak of the bloom. Subsequently, the pH decreased to 7.5. Microcosm experiments were conducted on natural assemblages sampled at the initiation of the spring bloom each year and manipulated to cover pH levels in the range of 8.0-9.5 to test the immediate tolerance of Arctic protist plankton to elevated pH under nutrient-limiting (2011) and nutrient-rich conditions (2012). The most pronounced effect of elevated pH was found for heterotrophic protists, whereas phytoplankton proved more robust. Two out of three heterotrophic protist species were significantly affected if pH increased above 8.5, and all heterotrophic protists had disappeared at pH 9.5. Based on Chl a measurements from the two sets of experiments, phytoplankton community growth was significantly reduced at pH 9.5 during nutrient-rich conditions, while pH had little impact on nutrient-limited phytoplankton growth. The results were supported by cell counts that revealed that phytoplankton growth during nutrient-rich conditions was significantly reduced from an average of 0.49 d-1 at pH 8.0 to an average of 0.27 d-1 at pH 9.5. In comparison, only one out of four tested phytoplankton species were significantly affected by elevated pH under nutrient-limited conditions. Sudden pH fluctuations, such as those occurring during phytoplankton blooms, will most likely favour pH-tolerant species, such as diatoms. |
format |
Article in Journal/Newspaper |
author |
Riisgaard, Karen Nielsen, Torkel Gissel Hansen, Per Juel |
spellingShingle |
Riisgaard, Karen Nielsen, Torkel Gissel Hansen, Per Juel Impact of elevated pH on succession in the Arctic spring bloom |
author_facet |
Riisgaard, Karen Nielsen, Torkel Gissel Hansen, Per Juel |
author_sort |
Riisgaard, Karen |
title |
Impact of elevated pH on succession in the Arctic spring bloom |
title_short |
Impact of elevated pH on succession in the Arctic spring bloom |
title_full |
Impact of elevated pH on succession in the Arctic spring bloom |
title_fullStr |
Impact of elevated pH on succession in the Arctic spring bloom |
title_full_unstemmed |
Impact of elevated pH on succession in the Arctic spring bloom |
title_sort |
impact of elevated ph on succession in the arctic spring bloom |
publishDate |
2015 |
url |
https://orbit.dtu.dk/en/publications/e2c44a77-9175-46ce-8e31-c437c98ade8a https://doi.org/10.3354/meps11296 https://backend.orbit.dtu.dk/ws/files/112087630/Publishers_version.pdf |
genre |
Arctic Arctic Disko Bay Greenland Phytoplankton |
genre_facet |
Arctic Arctic Disko Bay Greenland Phytoplankton |
op_source |
Riisgaard , K , Nielsen , T G & Hansen , P J 2015 , ' Impact of elevated pH on succession in the Arctic spring bloom ' , Marine Ecology Progress Series , vol. 530 , pp. 63-75 . https://doi.org/10.3354/meps11296 |
op_relation |
https://orbit.dtu.dk/en/publications/e2c44a77-9175-46ce-8e31-c437c98ade8a |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps11296 |
container_title |
Marine Ecology Progress Series |
container_volume |
530 |
container_start_page |
63 |
op_container_end_page |
75 |
_version_ |
1799471236466606080 |