Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic

Abstract Rapidly warming Arctic is facing significant shifts in the zooplankton size-spectra manifested as increasing numbers of the small-sized copepod Oithona similis. Here we present a unique continuous data set covering 22 months, on its copepodite structure along with environmental drivers in t...

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Autores principales:	Kaja Balazy, Rafał Boehnke, Emilia Trudnowska, Janne E. Søreide, Katarzyna Błachowiak-Samołyk
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/02afd6a8386a496782e91264a480929f
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spelling	oai:doaj.org-article:02afd6a8386a496782e91264a480929f2021-12-02T18:13:45ZPhenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic10.1038/s41598-021-98068-82045-2322https://doaj.org/article/02afd6a8386a496782e91264a480929f2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98068-8https://doaj.org/toc/2045-2322Abstract Rapidly warming Arctic is facing significant shifts in the zooplankton size-spectra manifested as increasing numbers of the small-sized copepod Oithona similis. Here we present a unique continuous data set covering 22 months, on its copepodite structure along with environmental drivers in the Atlantic-influenced high Arctic fjord Isfjorden (Spitsbergen). Abundance maxima of O. similis were observed in September when the highest seawater temperature was recorded. A high concentration of the indicator species of Atlantification Oithona atlantica was also observed at that time. The clear dominance of O. similis in the zooplankton community during the dark, theoretically unproductive season emphasizes its substantial role in sustaining a continuous carbon flow, when most of the large herbivorous copepods fall into sleeping state. The high sex ratio observed twice in both years during periods of high primary production suggests two main reproductive events per year. O. similis reproduced even in very low temperatures (< 0 °C) previously thought to limit their fecundity, which proves its unique thermal tolerance. Our study provides a new insight on ecology of this key copepod of marine ecosystems across the globe, and thus confirm the Climatic Variability Hypothesis assuming that natural selection favour species with such flexible adaptive traits as O. similis.Kaja BalazyRafał BoehnkeEmilia TrudnowskaJanne E. SøreideKatarzyna Błachowiak-SamołykNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kaja Balazy Rafał Boehnke Emilia Trudnowska Janne E. Søreide Katarzyna Błachowiak-Samołyk Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic
description	Abstract Rapidly warming Arctic is facing significant shifts in the zooplankton size-spectra manifested as increasing numbers of the small-sized copepod Oithona similis. Here we present a unique continuous data set covering 22 months, on its copepodite structure along with environmental drivers in the Atlantic-influenced high Arctic fjord Isfjorden (Spitsbergen). Abundance maxima of O. similis were observed in September when the highest seawater temperature was recorded. A high concentration of the indicator species of Atlantification Oithona atlantica was also observed at that time. The clear dominance of O. similis in the zooplankton community during the dark, theoretically unproductive season emphasizes its substantial role in sustaining a continuous carbon flow, when most of the large herbivorous copepods fall into sleeping state. The high sex ratio observed twice in both years during periods of high primary production suggests two main reproductive events per year. O. similis reproduced even in very low temperatures (< 0 °C) previously thought to limit their fecundity, which proves its unique thermal tolerance. Our study provides a new insight on ecology of this key copepod of marine ecosystems across the globe, and thus confirm the Climatic Variability Hypothesis assuming that natural selection favour species with such flexible adaptive traits as O. similis.
format	article
author	Kaja Balazy Rafał Boehnke Emilia Trudnowska Janne E. Søreide Katarzyna Błachowiak-Samołyk
author_facet	Kaja Balazy Rafał Boehnke Emilia Trudnowska Janne E. Søreide Katarzyna Błachowiak-Samołyk
author_sort	Kaja Balazy
title	Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic
title_short	Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic
title_full	Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic
title_fullStr	Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic
title_full_unstemmed	Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic
title_sort	phenology of oithona similis demonstrates that ecological flexibility may be a winning trait in the warming arctic
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/02afd6a8386a496782e91264a480929f
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Phenology of Oithona similis demonstrates that ecological flexibility may be a winning trait in the warming Arctic

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