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Temporal and spatial variation in temperature experienced by macrofauna at main endeavour Hydrothermal vent field

Temporal and spatial variation in temperature experienced by macrofauna at main endeavour Hydrothermal vent field
Temporal and spatial variation in temperature experienced by macrofauna at main endeavour Hydrothermal vent field

A significant focus of hydrothermal vent ecological studies has been to understand how species cope with various stressors through physiological tolerance and biochemical resistance. Yet, the environmental conditions experienced by vent species have not been well characterized. This objective requires continuous observations over time intervals that can capture environmental variability at scales that are relevant to animals. We used autonomous temperature logger arrays (four roughly parallel linear arrays of 12 loggers spaced every 10–12 cm) to study spatial and temporal variations in the thermal regime experienced by hydrothermal vent macrofauna at a diffuse flow vent. Hourly temperatures were recorded over eight months from 2010 to 2011 at Grotto vent in the Main Endeavour vent field on the Juan de Fuca Ridge, a focus area of the Ocean Networks Canada cabled observatory. The conspicuous animal assemblages in video footage contained Ridgeia piscesae tubeworms, gastropods (primarily Lepetodrilus fucensis), and polychaetes (polynoid scaleworms and the palm worm Paralvinella palmiformis). Two dimensional spatial gradients in temperature were generally stable over the deployment period. The average temperature recorded by all arrays, and in some individual loggers, revealed distinctive fluctuations in temperature that often corresponded with the tidal cycle. We postulate that this may be related to changes in bottom currents or fluctuations in vent discharge. A marked transient temperature increase lasting over a period of days was observed in April 2011. While the distributions and behavior of Juan de Fuca Ridge vent invertebrates may be partially constrained by environmental temperature and temperature tolerance, except for the one transient high-temperature event, observed fluid temperatures were generally similar to the thermal preferences for some species, and typically well below lethal temperatures for all species. Average temperatures of the four arrays ranged from 4.1 to 11.0 °C during the deployment, indicating that on an hourly timescale the temperature conditions in this tubeworm community were fairly moderate and stable. The generality of these findings and behavioural responses of vent organisms to predictable rhythmicity and non-periodic temperature shifts are areas for further investigation.
Hydrothermal vents, Community ecology, Thermal biology, Endeavour, Time-series
0967-0637
154-166
Lee, Raymond W.
eb0de84e-c1f5-4ae3-92a8-a5f01fbae80f
Robert, Katleen
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Matabos, Marjolaine
303be0d5-6dc0-465c-9f95-9d2d4d20cfc3
Bates, Amanda E.
a96e267d-6d22-4232-b7ed-ce4e448a2a34
Juniper, S. Kim
2b48fa82-0129-4285-ae76-11f4bc63aaf8
Lee, Raymond W.
eb0de84e-c1f5-4ae3-92a8-a5f01fbae80f
Robert, Katleen
49e4bfa2-0999-41ec-b50d-65c0f8896583
Matabos, Marjolaine
303be0d5-6dc0-465c-9f95-9d2d4d20cfc3
Bates, Amanda E.
a96e267d-6d22-4232-b7ed-ce4e448a2a34
Juniper, S. Kim
2b48fa82-0129-4285-ae76-11f4bc63aaf8

Lee, Raymond W., Robert, Katleen, Matabos, Marjolaine, Bates, Amanda E. and Juniper, S. Kim (2015) Temporal and spatial variation in temperature experienced by macrofauna at main endeavour Hydrothermal vent field. Deep Sea Research Part I: Oceanographic Research Papers, 106, 154-166. (doi:10.1016/j.dsr.2015.10.004).

Record type: Article

Abstract


A significant focus of hydrothermal vent ecological studies has been to understand how species cope with various stressors through physiological tolerance and biochemical resistance. Yet, the environmental conditions experienced by vent species have not been well characterized. This objective requires continuous observations over time intervals that can capture environmental variability at scales that are relevant to animals. We used autonomous temperature logger arrays (four roughly parallel linear arrays of 12 loggers spaced every 10–12 cm) to study spatial and temporal variations in the thermal regime experienced by hydrothermal vent macrofauna at a diffuse flow vent. Hourly temperatures were recorded over eight months from 2010 to 2011 at Grotto vent in the Main Endeavour vent field on the Juan de Fuca Ridge, a focus area of the Ocean Networks Canada cabled observatory. The conspicuous animal assemblages in video footage contained Ridgeia piscesae tubeworms, gastropods (primarily Lepetodrilus fucensis), and polychaetes (polynoid scaleworms and the palm worm Paralvinella palmiformis). Two dimensional spatial gradients in temperature were generally stable over the deployment period. The average temperature recorded by all arrays, and in some individual loggers, revealed distinctive fluctuations in temperature that often corresponded with the tidal cycle. We postulate that this may be related to changes in bottom currents or fluctuations in vent discharge. A marked transient temperature increase lasting over a period of days was observed in April 2011. While the distributions and behavior of Juan de Fuca Ridge vent invertebrates may be partially constrained by environmental temperature and temperature tolerance, except for the one transient high-temperature event, observed fluid temperatures were generally similar to the thermal preferences for some species, and typically well below lethal temperatures for all species. Average temperatures of the four arrays ranged from 4.1 to 11.0 °C during the deployment, indicating that on an hourly timescale the temperature conditions in this tubeworm community were fairly moderate and stable. The generality of these findings and behavioural responses of vent organisms to predictable rhythmicity and non-periodic temperature shifts are areas for further investigation.

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More information

e-pub ahead of print date: 9 October 2015
Published date: December 2015
Keywords: Hydrothermal vents, Community ecology, Thermal biology, Endeavour, Time-series
Organisations: Ocean and Earth Science, Marine Geoscience

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Local EPrints ID: 383063
URI: http://eprints.soton.ac.uk/id/eprint/383063
ISSN: 0967-0637
PURE UUID: 7cb93f8f-9c4a-439b-9e56-133590d58231

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Date deposited: 21 Oct 2015 15:38
Last modified: 08 Jan 2022 12:28

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Contributors

Author: Raymond W. Lee
Author: Katleen Robert
Author: Marjolaine Matabos
Author: Amanda E. Bates
Author: S. Kim Juniper

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