Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs
Abstract One of the most significant features of the Northwest Atlantic, the Gulf Stream influences high magnitude environmental fluctuations in deep habitats across the South Atlantic Bight. Amid this variability, the Blake Plateau harbors extensive reefs formed by cold‐water corals that were previ...
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Online Access: | http://dx.doi.org/10.1002/lno.12659 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12659 |
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crwiley:10.1002/lno.12659 2024-09-15T18:26:23+00:00 Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs Carrick, Jane V. Mienis, Furu Cordes, Erik E. Demopoulos, Amanda W.J. Davies, Andrew J. Bureau of Ocean Energy Management 2024 http://dx.doi.org/10.1002/lno.12659 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12659 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography ISSN 0024-3590 1939-5590 journal-article 2024 crwiley https://doi.org/10.1002/lno.12659 2024-09-03T04:25:50Z Abstract One of the most significant features of the Northwest Atlantic, the Gulf Stream influences high magnitude environmental fluctuations in deep habitats across the South Atlantic Bight. Amid this variability, the Blake Plateau harbors extensive reefs formed by cold‐water corals that were previously assumed to rely on narrow ranges of temperature, currents, and particulate supply. A benthic lander collected near‐bed conditions at the Richardson Reef Complex, a cold‐water reef dominated by the scleractinian Desmophyllum pertusum at 830 m within the path of the Gulf Stream. Specific behavior of the Gulf Stream resulted in recurring environmental patterns at depth. During offshore meanders, deep stream components intruded onto the reef and caused rapid (3.74°C per hour) temperature increases up to 10.8°C (> 5°C above the site mean) and increased chlorophyll. Within 2 d of peak temperatures, intrusions were replaced by strong, turbid upwelling currents that rapidly cooled the site to temperature minima (4.13°C). While considerable environmental variability from the Gulf Stream may otherwise implicate a thermally stressful setting for corals, high‐temperature events were likely mitigated by their short duration (< 37.4 h) and physical coupling with enhanced organic material. This hypothesis was supported by high‐density clustering of D. pertusum occurrences within 50 km around the Gulf Stream's position along the South Atlantic Bight. This suggests that cold‐water corals experiencing environmental variability can be sustained by relationships between food supply, temperature, and currents that vary in strength along stochastic time scales, shedding further light on the niche of cold‐water corals. Article in Journal/Newspaper Northwest Atlantic Wiley Online Library Limnology and Oceanography |
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Wiley Online Library |
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English |
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Abstract One of the most significant features of the Northwest Atlantic, the Gulf Stream influences high magnitude environmental fluctuations in deep habitats across the South Atlantic Bight. Amid this variability, the Blake Plateau harbors extensive reefs formed by cold‐water corals that were previously assumed to rely on narrow ranges of temperature, currents, and particulate supply. A benthic lander collected near‐bed conditions at the Richardson Reef Complex, a cold‐water reef dominated by the scleractinian Desmophyllum pertusum at 830 m within the path of the Gulf Stream. Specific behavior of the Gulf Stream resulted in recurring environmental patterns at depth. During offshore meanders, deep stream components intruded onto the reef and caused rapid (3.74°C per hour) temperature increases up to 10.8°C (> 5°C above the site mean) and increased chlorophyll. Within 2 d of peak temperatures, intrusions were replaced by strong, turbid upwelling currents that rapidly cooled the site to temperature minima (4.13°C). While considerable environmental variability from the Gulf Stream may otherwise implicate a thermally stressful setting for corals, high‐temperature events were likely mitigated by their short duration (< 37.4 h) and physical coupling with enhanced organic material. This hypothesis was supported by high‐density clustering of D. pertusum occurrences within 50 km around the Gulf Stream's position along the South Atlantic Bight. This suggests that cold‐water corals experiencing environmental variability can be sustained by relationships between food supply, temperature, and currents that vary in strength along stochastic time scales, shedding further light on the niche of cold‐water corals. |
author2 |
Bureau of Ocean Energy Management |
format |
Article in Journal/Newspaper |
author |
Carrick, Jane V. Mienis, Furu Cordes, Erik E. Demopoulos, Amanda W.J. Davies, Andrew J. |
spellingShingle |
Carrick, Jane V. Mienis, Furu Cordes, Erik E. Demopoulos, Amanda W.J. Davies, Andrew J. Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs |
author_facet |
Carrick, Jane V. Mienis, Furu Cordes, Erik E. Demopoulos, Amanda W.J. Davies, Andrew J. |
author_sort |
Carrick, Jane V. |
title |
Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs |
title_short |
Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs |
title_full |
Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs |
title_fullStr |
Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs |
title_full_unstemmed |
Gulf Stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs |
title_sort |
gulf stream intrusion and deep current upwelling drive dynamic patterns of temperature and food supply within cold‐water coral reefs |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/lno.12659 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12659 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Limnology and Oceanography ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.12659 |
container_title |
Limnology and Oceanography |
_version_ |
1810466871252615168 |