Large versus small zooplankton in relation to temperature in the Arctic shelf region

Balazy, Kaja; Trudnowska, Emilia; Wichorowski, Marcin; Błachowiak‐Samołyk, Katarzyna

doi:10.1080/17518369.2018.1427409

Cited by 29 publications

(24 citation statements)

References 81 publications

(115 reference statements)

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“…The 7-year studies from the Arctic shelf region with measurements repeated at the same time of the year (July/August), clearly confirmed that higher water temperatures favour the small zooplankton fractions represented (among others) by O . similis over larger ones 15 .…”

Section: Introductionmentioning

confidence: 98%

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

Balazy

Boehnke

Trudnowska

et al. 2021

Sci Rep

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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.

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Section: Introductionmentioning

confidence: 98%

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

Balazy

Boehnke

Trudnowska

et al. 2021

Sci Rep

Self Cite

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“…Climate warming is altering the distribution of Arctic zooplankton in ways that could negatively affect the feeding success of young polar cod. For instance, a general decrease in the proportion of large zooplankton in Arctic seas (e.g., Balazy et al 2018 ; Møller and Nielsen 2019 ) and the northward penetration of the smaller C. finmarchicus (e.g., Beaugrand et al 2013 ) could reduce the availability of high-energy prey to polar cod larvae and juveniles.…”

Section: Introductionmentioning

confidence: 99%

The importance of Calanus glacialis for the feeding success of young polar cod: a circumpolar synthesis

Bouchard

Fortier

2020

Polar Biol

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Understanding the feeding ecology of polar cod (Boreogadus saida) during its first year of life is crucial to forecasting its response to the ongoing borealization of Arctic seas. We investigated the relationships between diet composition and feeding success in 1797 polar cod larvae and juveniles 4.5-55.6 mm standard length (SL) collected in five Arctic seas from 1993 to 2009. Prey were identified to species and developmental stages when possible, measured, and their carbon content was estimated using taxon-specific allometric equations. Feeding success was defined as the ratio of ingested carbon to fish weight. Carbon uptake in polar cod larvae < 15 mm was sourced primarily from calanoid copepods eggs and nauplii which were positively selected from the plankton. With increasing length, carbon sources shifted from eggs and nauplii to the copepodites of Calanus glacialis, Calanus hyperboreus and Pseudocalanus spp. Calanus glacialis copepodites were the main carbon source in polar cod > 25 mm and the only copepodite positively selected for. Pseudocalanus spp. copepodites became important replacement prey when C. glacialis left the epipelagic layer at the end of summer. Calanus glacialis was the preferred prey of polar cod, contributing from 23 to 84% of carbon uptake at any stage in the early development. Feeding success was determined by the number of prey captured in larvae < 15 mm and by the size of prey in juveniles > 30 mm. As Arctic seas warm, the progressive displacement of C. glacialis by the smaller Calanus finmarchicus could accelerate the replacement of polar cod, the dominant Arctic forage fish, by boreal species.

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“…There are many examples of successful application of ChlF for studying the reaction of photosynthetic apparatus to different environmental stresses, such as light intensity (Cai andXu 2002, Živčák et al 2014), high and low temperature (Alam et al 2005, Oukarroum et al 2013), drought (Goltsev et al 2012, Abid et al 2017, salinity (Dąbrowski et al 2016, Allel et al 2018, heavy metals (Azevedo et al 2005, Baycu et al 2017, herbicides (Ferrell et al 2003) or nutrient deficiency (Cetner et al 2017, Kalaji et al 2017b. Moreover, ChlF is used in agriculture Rosenqvist 2004, Massacci et al 2008), forestry (Lapa et al 2017, Kučerová et al 2018, ecology (Bussotti 2004, Bąba et al 2012, climate change studies (Drusch et al 2017, Bałazy et al 2018, Pflug et al 2018, and vegetation research (Li et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Discovering trends in photosynthesis using modern analytical tools:More than 100 reasons to use chlorophyll fluorescence

Bąba¹,

Kompała‐Bąba²,

Zabochnicka-Świątek³

et al. 2019

Photosynt.

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In this review, using the network analysis, based on the bibliometric data, collected from Web of Science Core Collection database, we followed the development of chlorophyll fluorescence research (CFR) during 1947-2018. We confirmed dramatic increase in diversity of CFR from late 90-ties and vigorous development of this discipline in the last ten years. They are parallel to an increase in number of research areas and institutions involved and were triggered by the accumulation of knowledge and methodological, technological, and communication advances, especially modern fluorimeters and fluorescence techniques. The network analysis of keywords and research areas confirmed CFR changed into modern, multidisciplinary, highly collaborative discipline, in which in spite of many 'core' disciplines as plant science, environmental sciences, agronomy/food science and technology, the promising, modern areas developed: biochemistry and molecular biology, remote sensing, and big data artificial intelligence method.

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Large versus small zooplankton in relation to temperature in the Arctic shelf region

Cited by 29 publications

References 81 publications

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

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

The importance of Calanus glacialis for the feeding success of young polar cod: a circumpolar synthesis

Discovering trends in photosynthesis using modern analytical tools:More than 100 reasons to use chlorophyll fluorescence

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