Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature

The alkenones C37:2 and C37:3 are produced exclusively by some haptophyte species. Their relative proportion (Uk’37 index) may be used to infer the water temperature where the synthesising haptophyte lived. Alkenones have been analysed in sediments, planktonic communities and in the low trophic leve...

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Autores principales:	Diego Rita, Asunción Borrell, Alex Aguilar
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Odontocete Marine mammal Alkenone Uk’37 Temperature proxy Mediterranean Sea Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/3e65e00f948740bab85ccd6a5744f34c
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spelling	oai:doaj.org-article:3e65e00f948740bab85ccd6a5744f34c2021-12-01T04:40:04ZAlkenones in oceanic odontocetes as a potential proxy of environmental water temperature1470-160X10.1016/j.ecolind.2020.107240https://doaj.org/article/3e65e00f948740bab85ccd6a5744f34c2021-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20311791https://doaj.org/toc/1470-160XThe alkenones C37:2 and C37:3 are produced exclusively by some haptophyte species. Their relative proportion (Uk’37 index) may be used to infer the water temperature where the synthesising haptophyte lived. Alkenones have been analysed in sediments, planktonic communities and in the low trophic level, filter-feeding fin whales. However, it is unclear whether they can be detected in animals exploiting high trophic levels and used to infer the water temperature in which they live. Alkenones were analysed in blubber samples from three Mediterranean predatory species: the striped dolphin, an epipelagic species; the Risso’s dolphin, a deep diver; and the bottlenose dolphin, a coastal species. Alkenones were detected in all striped dolphin samples and in most of the Risso’s dolphin samples, but they were below detection limits in the bottlenose dolphin samples. The inferred temperature for the striped dolphins (16.4 ± 3.3 °C) was similar to the average water temperature of the region (16.9 ± 3.9 °C), but that for the Risso’s dolphins was lower than expected (12.7 ± 4.4 °C). The small sample sizes and the large variance in the Uk’37 index make it difficult to ascertain if the dissimilarity between the two oceanic species is real. Although further research is needed to calibrate this bio-indicator, we can conclude that alkenones are transferred through the trophic web and are found in oceanic cetaceans situated at a high trophic level.Diego RitaAsunción BorrellAlex AguilarElsevierarticleOdontoceteMarine mammalAlkenoneUk’37Temperature proxyMediterranean SeaEcologyQH540-549.5ENEcological Indicators, Vol 122, Iss , Pp 107240- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Odontocete Marine mammal Alkenone Uk’37 Temperature proxy Mediterranean Sea Ecology QH540-549.5
spellingShingle	Odontocete Marine mammal Alkenone Uk’37 Temperature proxy Mediterranean Sea Ecology QH540-549.5 Diego Rita Asunción Borrell Alex Aguilar Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature
description	The alkenones C37:2 and C37:3 are produced exclusively by some haptophyte species. Their relative proportion (Uk’37 index) may be used to infer the water temperature where the synthesising haptophyte lived. Alkenones have been analysed in sediments, planktonic communities and in the low trophic level, filter-feeding fin whales. However, it is unclear whether they can be detected in animals exploiting high trophic levels and used to infer the water temperature in which they live. Alkenones were analysed in blubber samples from three Mediterranean predatory species: the striped dolphin, an epipelagic species; the Risso’s dolphin, a deep diver; and the bottlenose dolphin, a coastal species. Alkenones were detected in all striped dolphin samples and in most of the Risso’s dolphin samples, but they were below detection limits in the bottlenose dolphin samples. The inferred temperature for the striped dolphins (16.4 ± 3.3 °C) was similar to the average water temperature of the region (16.9 ± 3.9 °C), but that for the Risso’s dolphins was lower than expected (12.7 ± 4.4 °C). The small sample sizes and the large variance in the Uk’37 index make it difficult to ascertain if the dissimilarity between the two oceanic species is real. Although further research is needed to calibrate this bio-indicator, we can conclude that alkenones are transferred through the trophic web and are found in oceanic cetaceans situated at a high trophic level.
format	article
author	Diego Rita Asunción Borrell Alex Aguilar
author_facet	Diego Rita Asunción Borrell Alex Aguilar
author_sort	Diego Rita
title	Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature
title_short	Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature
title_full	Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature
title_fullStr	Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature
title_full_unstemmed	Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature
title_sort	alkenones in oceanic odontocetes as a potential proxy of environmental water temperature
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3e65e00f948740bab85ccd6a5744f34c
work_keys_str_mv	AT diegorita alkenonesinoceanicodontocetesasapotentialproxyofenvironmentalwatertemperature AT asuncionborrell alkenonesinoceanicodontocetesasapotentialproxyofenvironmentalwatertemperature AT alexaguilar alkenonesinoceanicodontocetesasapotentialproxyofenvironmentalwatertemperature
_version_	1718405806132559872

Alkenones in oceanic odontocetes as a potential proxy of environmental water temperature

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