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Future Ocean Warming and Acidificati...

Ferreira, Sonia Isabel Ribeiro,

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Future Ocean Warming and Acidification: Simultaneous Impacts on the Green Crab Carcinus Maenas /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Future Ocean Warming and Acidification: Simultaneous Impacts on the Green Crab Carcinus Maenas // Sonia Isabel Ribeiro Ferreira.
Author:	Ferreira, Sonia Isabel Ribeiro,
Description:	1 electronic resource (64 pages)
Notes:	Source: Masters Abstracts International, Volume: 84-01.
Contained By:	Masters Abstracts International84-01.
Subject:	Crustaceans. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29149974
ISBN:	9798835560561

Future Ocean Warming and Acidification: Simultaneous Impacts on the Green Crab Carcinus Maenas /
Ferreira, Sonia Isabel Ribeiro,

Future Ocean Warming and Acidification: Simultaneous Impacts on the Green Crab Carcinus Maenas /Sonia Isabel Ribeiro Ferreira. - 1 electronic resource (64 pages)

Source: Masters Abstracts International, Volume: 84-01.

Anthropogenic climate change is gradually provoking ocean warming and acidification, noticeable even at a small temporal scale. The available literature indicates varying responses of different species to the exposure levels indicated by climate predictions. Thus, perceiving the responses of key species to such climate changes is critical to determining how the marine environment may be affected in the future and develop measures to increase their resilience. This study investigated combined effects of predicted levels of ocean warming and acidification on some fitness-linked species traits and responses such as the mechanical properties of Carcinus maenas shell, crabs' predatory behaviour, metabolic rates (O2 consumption) and activity of neurotransmission (acetylcholinesterase, AChE) and energy production (lactate dehydrogenase, LDH, and isocitrate dehydrogenase, IDH) enzymes. The crabs were exposed for 30 days to six treatments resulting from the combination of two pH levels (ambient: 8.02; low: 7.88) and three temperatures (18 ºC. 22 ºC and 26 ºC). The experimental pH and temperatures were selected according to the recent predictions of the International Panel on Climate Change (IPCC). During exposure, the mortality, predatory behaviour and metabolic rates were assessed. Metabolic rate measurements focused on two conditions of O2 consumption: when animals were fed and when they were deprived from eating by 48h prior to the measurements. Predatory behaviour trials consisted in investigating the number of feeding attempts of C. maenas on Mytillus sp, from collected nocturnal videos using animals from each treatment, after 12, 18 and 24 days after exposure on the mesocosms. After exposure biological sampling was done: carapace was used to assess possible effects on the calcifying structure and organs and tissues were removed to determine the activities of AChE (ganglion and muscle), LDH (muscle) and IDH (muscle). Different interactions between pH and temperature were observed across measurements. Whereas significant effects of pH were observed in carapace hardness and width, temperature seems to have a preponderant effect on IDH activity and crab survival despite pH treatments. This study suggested synergistic negative effects of these climate change drivers on some of the responses, although on overall the resilience of this species is high probably enough to cope with the stress resulting from near future warming and acidification trends.

English

ISBN: 9798835560561Subjects--Topical Terms:

3548330
Crustaceans.

Future Ocean Warming and Acidification: Simultaneous Impacts on the Green Crab Carcinus Maenas /
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100 1 $a Ferreira, Sonia Isabel Ribeiro, $e author. $3 3828251
245 1 0 $a Future Ocean Warming and Acidification: Simultaneous Impacts on the Green Crab Carcinus Maenas / $c Sonia Isabel Ribeiro Ferreira.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 1 electronic resource (64 pages)
336 $a text $b txt $2 rdacontent
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500 $a Source: Masters Abstracts International, Volume: 84-01.
500 $a Advisors: Arenas, Francisco; Guimaraes, Laura.
502 $b M.Sc. $c Universidade do Porto (Portugal) $d 2021.
520 $a Anthropogenic climate change is gradually provoking ocean warming and acidification, noticeable even at a small temporal scale. The available literature indicates varying responses of different species to the exposure levels indicated by climate predictions. Thus, perceiving the responses of key species to such climate changes is critical to determining how the marine environment may be affected in the future and develop measures to increase their resilience. This study investigated combined effects of predicted levels of ocean warming and acidification on some fitness-linked species traits and responses such as the mechanical properties of Carcinus maenas shell, crabs' predatory behaviour, metabolic rates (O2 consumption) and activity of neurotransmission (acetylcholinesterase, AChE) and energy production (lactate dehydrogenase, LDH, and isocitrate dehydrogenase, IDH) enzymes. The crabs were exposed for 30 days to six treatments resulting from the combination of two pH levels (ambient: 8.02; low: 7.88) and three temperatures (18 ºC. 22 ºC and 26 ºC). The experimental pH and temperatures were selected according to the recent predictions of the International Panel on Climate Change (IPCC). During exposure, the mortality, predatory behaviour and metabolic rates were assessed. Metabolic rate measurements focused on two conditions of O2 consumption: when animals were fed and when they were deprived from eating by 48h prior to the measurements. Predatory behaviour trials consisted in investigating the number of feeding attempts of C. maenas on Mytillus sp, from collected nocturnal videos using animals from each treatment, after 12, 18 and 24 days after exposure on the mesocosms. After exposure biological sampling was done: carapace was used to assess possible effects on the calcifying structure and organs and tissues were removed to determine the activities of AChE (ganglion and muscle), LDH (muscle) and IDH (muscle). Different interactions between pH and temperature were observed across measurements. Whereas significant effects of pH were observed in carapace hardness and width, temperature seems to have a preponderant effect on IDH activity and crab survival despite pH treatments. This study suggested synergistic negative effects of these climate change drivers on some of the responses, although on overall the resilience of this species is high probably enough to cope with the stress resulting from near future warming and acidification trends.
520 $a As alteracoes climaticas estao gradualmente a aumentar o aquecimento e acidificacao da agua do mar. A literatura disponivel indica respostas variadas de diferentes especies a exposicao aos niveis indicados pelas previsoes climaticas. Assim, perceber as respostas de especies-chave as mudancas climaticas e fundamental para determinar como o ambiente marinho podera ser afetado no futuro e planear possiveis medidas de protecao que aumentem a sua resiliencia a estas alteracoes. No presente estudo foram investigados os efeitos combinados de niveis aquecimento e acidificacao do oceano nas propriedades mecanicas da carapaca de Carcinus maenas e tambem no comportamento predatorio dos caranguejos, na sua taxa metabolica (consumo de O2) e na atividade de enzimas relacionada com a neurotransmissao colinergica (acetilcolinesterase, AChE) e a producao de energia (lactato desidrogenase, LDH, e isocitrato desidrogenase, IDH). Os caranguejos foram expostos por 30 dias a seis tratamentos resultantes da combinacao de dois niveis de pH (ambiente: 8.02; baixo: 7.88) e tres temperaturas (18 °C, 22 °C e 26 °C). Os niveis de pH e temperatura foram selecionados a partir das previsoes recentes efetuadas pelo Painel Internacional sobre Mudancas Climaticas (IPCC). Durante a exposicao, foram analisadas a mortalidade, o comportamento predatorio e a taxa metabolica. A avaliacao da taxa metabolica focou-se em duas condicoes de consumo de O2: quando os animais eram alimentados e quando eles eram privados de comer por 48h antes das medicoes de consumo. A avaliacao do comportamento predatorio consistiu em investigar o numero de tentativas de alimentacao de C. maenas sobre Mytillus sp, a partir de videos noturnos obtidos com animais de cada tratamento, apos 12, 18 e 24 dias de exposicao nos mesocosmos. Apos a exposicao, tambem foram recolhidas amostras biologicas: a carapaca foi usada para avaliar os efeitos na estrutura calcificante e os orgaos e tecidos foram removidos para determinar a atividade das enzimas AChE (em ganglio e musculo), LDH (musculo) e IDH (musculo). Os resultados obtidos revelaram efeitos significativos de diminuicao de pH na dureza e no crescimento da carapaca, e diminuicao na atividade da IDH e na sobrevivencia do caranguejo. Este estudo revelou efeitos negativos sinergeticos em algumas das respostas devido a estes fatores de mudanca climaticas. No entanto, em geral, a resiliencia desta especie sera provavelmente alta o suficiente para lidar com o stress resultante de tendencias de aquecimento e acidificacao num futuro proximo.
546 $a English
590 $a School code: 5896
650 4 $a Crustaceans. $3 3548330
650 4 $a Emissions. $3 3559499
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Carbon dioxide. $3 587886
650 4 $a Animal sciences. $3 3174829
690 $a 0404
690 $a 0475
710 2 $a Universidade do Porto (Portugal). $e degree granting institution. $3 3815379
720 1 $a Arenas, Francisco $e degree supervisor.
720 1 $a Guimaraes, Laura $e degree supervisor.
773 0 $t Masters Abstracts International $g 84-01.
790 $a 5896
791 $a M.Sc.
792 $a 2021
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29149974