The effects of temperature and salinity on vital biological functions of the Antarctic crustacean Serolis polita

Janecki, Tomasz; Kidawa, Anna; Potocka, Marta

doi:10.1007/s00300-010-0779-y

Cited by 42 publications

(12 citation statements)

References 49 publications

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“…Species adapted to broad variations of environmental factors, such as the temperate shrimp Palaemon peringuery, for instance, did not show any significant differences in oxygen consumption when data measured at the same temperature over a salinity range of 15 to 35 were compared (ALLAN et al, 2006). Antarctic ectotherms may present distinct adaptive ability depending on the species (WILSON et al, 2002;JANECKI et al, 2010;EVANS et al, 2012) and their respective habitats. Coastal water Antarctic ectotherms, however, seem to have a low capacity to survive during long periods at temperatures higher than the environmental average, even if they are able to tolerate this same temperature during a certain period of time (PÖRTNER et al, 2001;PECK, 2005;TOMANEK, 2008).…”

Section: Discussionmentioning

confidence: 98%

“…The coastal slope is steep and reaches a depth of 500m in the central regions, like a fjord with a great U-shaped valley (RAKUSA-SUSZCZEWSKI, 1980;MONTONE, 2006;MONTONE et al, 2013). During summer, at the surface, mean sea water salinity is 34 and temperature may range from -0.2°C to 5.3°C; at the bottom, mean salinity is 34.5 and temperature varies from -0.4°C to 0.9°C (PRUSZAK, 1980;JAZDZESKI et al, 1986).…”

Section: Methodsmentioning

confidence: 99%

“…Individuals of Gondogeneia antarctica (CHEVREUX, 1906) are the most abundant amphipod in the shallow waters of Admiralty Bay JAZDZEWSKI, 1993). They are very suitable as biological material for this kind of study for a number of reasons: they are highly abundant in the subtidal zone of west Antarctica and are of great importance in coastal food webs (RICHARDSON, 1975;DUARTE;MORENO, 1981;JAZDZEWSKI et al, 2001); they can be easily collected during low tides with a hand net; they are very resistant and feed well in captivity. Our research group selected them as bioindicator organisms for biomonitoring studies after a long series of trials with a great number of species, due to their sensibility and the constancy of their responses to variations in environmental factors (GOMES et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Metabolic rates of the antarctic amphipod Gondogeneia antarctica at different temperatures and salinities

et al. 2013

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A B S T R A C TChanges in environmental factors may deeply affect the energy budget of Antarctic organisms as many of them are stenothermal and/or stenohaline ectotherms. In this context, the aim of this study is to contribute to knowledge on variations in the energy demand of the Antarctic amphipod, Gondogeneia antarctica as a function of temperature and salinity. Experiments were held at the Brazilian Antarctic Station "Comandante Ferraz", under controlled conditions. Animals collected at Admiralty Bay were acclimated to temperatures of 0°C; 2.5°C and 5°C and to salinities of 35, 30 and 25. Thirty measurements were made for each of the nine combinations of the three temperatures and three salinities, totalling 270 measurements. Metabolic rates were assessed by oxygen consumption and total nitrogenous ammonia excretion, in sealed respirometers. When acclimated to salinities 30 or 35, metabolic rates at 0°C and 2.5°C were very similar indicating a possible mechanism of metabolic compensation for temperature. At 5.0°C, however, metabolic rates were always higher. Lower salinities enhanced the effects of temperature on metabolism and ammonia excretion rates. The physiological adaptations of individuals of G. antarctica suggest adaptive mechanisms for energy saving, adjusted to an environment with stable conditions of temperature and salinity. Little is known about the joint effects of salinity and temperature and this study is an important contribution to the understanding of the mechanism of polar organisms in their adaptation to both factors. R E S U M OAlterações ambientais podem modificar a alocação de energia dos organismos, principalmente dos ectotermos estenotérmicos e/ou estenohalinos. Nesse contexto, este trabalho contribui com o conhecimento da demanda de energia do anfípode antártico Gondogeneia antarctica em função da temperatura e da salinidade. Experimentos foram realizados na Estação Antártica Brasileira "Comandante Ferraz", em condições laboratoriais controladas. Animais coletados na Baía do Almirantado foram aclimatados a temperaturas de 0°C; 2.5°C e 5°C e salinidades de 35, 30 and 25. Foram realizadas trinta medições para cada uma das nove combinações das três temperaturas com as três salinidades, totalizando 270 medições. As taxas metabólicas foram estimadas por meio do consumo de oxigênio e excreção de amônia, em câmaras respirométricas seladas. Quando aclimatados a salinidades 30 ou 35, as taxas metabólicas a 0°C e 2.5°C foram semelhantes indicando possível mecanismo de compensação térmica, nessa faixa de variação dos fatores. A 5.0°C, no entanto, as taxas metabólicas foram sempre mais elevadas. Baixas salinidades potencializaram os efeitos da temperatura no consumo de oxigênio e na excreção de produtos nitrogenados. Os resultados estão relacionados a mecanismos adaptativos para economia de energia em indivíduos G. antarctica, ajustados a um ambiente que tem condições estáveis de temperatura e de salinidade. Pouco se sabe sobre os efeitos conjugados da salinidade e temperatura nos organismos e...

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Section: Discussionmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metabolic rates of the antarctic amphipod Gondogeneia antarctica at different temperatures and salinities

et al. 2013

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“…Some species have been shown to be vulnerable to largescale environmental changes observed in the region of the West Antarctic Peninsula (Ingels et al 2012). Specifically, the mobility, physiology and development of benthic isopods may be affected by modification of hydrological and sedimentary regimes (Young et al 2006;Janecki et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

et al. 2017

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Isopods belong to the most speciose groups of the Antarctic benthic fauna, although the knowledge on their diversity and small-scale distribution patterns is still limited. Here we analyze the diversity of the isopod fauna in the Admiralty Bay, a glacial fjord on the King George Island. The basin is located in the region of the Antarctic Peninsula, the fastest warming area of the Southern Ocean. The study provides important baseline data for future research, particularly with respect to temporal fluctuations in benthic fauna, associated with global changes observed in that part of the world. Forty species of isopods representing 19 families were recorded on the soft bottom of the Admiralty Bay. The analyses were based on 99 quantitative samples collected, within the 20-502-m depth range, with a 0.1 m 2 van Veen grab. The materials for the analyses were obtained in the austral summer seasons of 1984/1985 and 1985/1986. The data revealed a high number of isopod species occurring at a low abundance, the mean abundance amounting to 4.8 ± 8.6 ind./0.1 m 2 . Most of the species occurred at low abundances, 25% of the species being represented by singletons. Caecognathia polaris, the most abundant species, showed the mean abundance of merely 1.2 ± 4.2 ind./0.1 m 2 . Species richness, diversity and abundance of the isopod fauna were much higher in the central basin of the Admiralty Bay than in the Ezcurra Inlet, an area affected by a strong disturbance of glacial origin.

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“…A cyclic decrease of water salinity led to a signifi cant increase in the mortality of halophiles. Experimental studies carried out by Janecki et al (2010) showed great vulnerability of ocean organisms to water salinity decline. Organic matter carried from the ocean to the shores of Admiralty Bay was the subject of detailed analyses.…”

Section: Characteristics Of the Ecology Lagoonmentioning

confidence: 99%

Effects of Climate Change on Microbial Community Structure and Function in the Antarctic Glacier Lagoon

Świątecki¹,

Górniak²,

Jankowska³

et al. 2010

Papers on Global Change IGBP

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One of the dramatic effects of global warming is the retreat of glaciers. This phenomenon has intensifi ed in the last two decades. Postglacial areas are quickly colonised by various groups of organisms. Auto-and heterotrophic microorganisms play an especially vital role in these processes. They thrive in shallow glacial lagoons which often form in front of retreating glaciers. These reservoirs are characterised by high dynamics of physicochemical parameters, including: salinity, temperature and concentrations of organic compounds and nutrients. The conducted microbiological studies have revealed rich structural and functional diversity of bacteria occurring in the ecosystem of Ecology Lagoon situated on King George Island. Bacteria found on the surface of algae and stones in the shore zone of the lagoon showed particularly intense metabolic activity. A molecular analysis has indicated that unique taxonomic groups of bacteria occur in the ecosystem of Ecology Lagoon.

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The effects of temperature and salinity on vital biological functions of the Antarctic crustacean Serolis polita

Cited by 42 publications

References 49 publications

Metabolic rates of the antarctic amphipod Gondogeneia antarctica at different temperatures and salinities

Metabolic rates of the antarctic amphipod Gondogeneia antarctica at different temperatures and salinities

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

Effects of Climate Change on Microbial Community Structure and Function in the Antarctic Glacier Lagoon

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