Climate influence on juvenile European sea bass (Dicentrarchus labrax, L.) populations in an estuarine nursery: A decadal overview

Bento, Eduardo G.; Grilo, Tiago F.; Nyitrai, Daniel; Dolbeth, Marina; Pardal, Miguel Ângelo; Martinho, Filipe

doi:10.1016/j.marenvres.2016.09.011

Cited by 27 publications

(23 citation statements)

References 61 publications

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“…The average minimum and maximum air temperature ranged between 11.5 to 22.6 °C in October 2018 ( www.ipma.pt ). Usually, water temperature during this time varies around 17 °C 57 .…”

Section: Methodsmentioning

confidence: 99%

“…We tested three temperature treatments, assuming five replicates per treatment, considering a (1) control, with a constant temperature of 17 °C, hereafter named as constant 17 °C; (2) short heatwave, with an 8 °C temperature increase for seven days, and a recovery period of 14 days when temperature decreased to 17 °C; (3) long heatwave, with 8 °C increase for 14 days and a recovery period of 7 days. The constant temperature of 17 °C was chosen based on the average values for the Mondego estuary 57 and those verified at the sampling time 58 . Daily temperature amplitude may change with the effect of the tides, absence of light, and season.…”

Section: Methodsmentioning

confidence: 99%

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Benthic estuarine communities' contribution to bioturbation under the experimental effect of marine heatwaves

Dolbeth¹,

Babe²,

Costa

et al. 2021

Sci Rep

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Marine heatwaves are increasing worldwide, with several negative impacts on biological communities and ecosystems. This 24-day study tested heatwaves' effect with distinct duration and recovery periods on benthic estuarine communities' diversity and contribution to ecosystem functioning experimentally. The communities were obtained from a temperate estuary, usually subjected to high daily thermal amplitudes. Our goal was to understand the communities' response to the thermal change, including the community descriptors and behavioural changes expected during heat extremes. We measured community composition and structural changes and the bioturbation process and nutrient release as ecosystem functioning measurements. Overall, our findings highlight the potential tolerance of studied estuarine species to the temperature ranges tested in the study, as community composition and structure were similar, independently of the warming effect. We detected a slight trend for bioturbation and nutrient release increase in the communities under warming, yet these responses were not consistent with the heatwaves exposure duration. Overall, we conclude on the complexity of estuarine communities’ contribution to functioning under warming, and the importance of scalable experiments with benthic organisms' responses to climate variability, accommodating longer time scales and replication. Such an approach would set more efficient expectations towards climate change mitigation or adaptation in temperate estuarine ecosystems.

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“…The average minimum and maximum air temperature ranged between 11.5 to 22.6 °C in October 2018 ( www.ipma.pt ). Usually, water temperature during this time varies around 17 °C 57 .…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Benthic estuarine communities' contribution to bioturbation under the experimental effect of marine heatwaves

Dolbeth¹,

Babe²,

Costa

et al. 2021

Sci Rep

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“…For juvenile seabass in particular, the expression of individual trophic specialisation appears related to levels of intraspecific competition, although it is appreciated that only one location was included in this study and therefore the regional extent of specialisation is unclear. Management measures designed to maintain diverse habitats facilitating individual specialisation and reducing levels of intraspecific competition will therefore promote survival and population growth in juvenile seabass during early, vulnerable life stages that are more susceptible to climatic fluctuations (Kelley, 2002;Le Pape & Bonhommeau, 2015;Bento et al, 2016) (Araújo et al, 2011). Enhanced juvenile survival will contribute to increasing standing stock biomass at a time when efforts are required at multiple levels to the recovery of this commercially important species (ICES, 2017;MMO, 2018).…”

Section: Discussionmentioning

confidence: 99%

Individual trophic specialization in juvenile European seabass: implications for the management of a commercially important species

Cobain

Steward

Trueman

et al. 2019

ICES Journal of Marine Science

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Individual differences in diet can play an important role defining a population's ecological niche and its role within food webs and habitats, but individual trophic specialization is rarely considered in a fisheries context. Stocks of European seabass, Dicentrarchus labrax, have declined in recent years, and policy has focused on managing fishing effort. Inshore nursery grounds represent a critical habitat in terms of recruitment to standing stocks, and improved understanding of the ecology of juvenile seabass at the level of the individual may assist the development of management strategies aimed at maximizing their survival and growth. We quantified levels of individual trophic specialization in juvenile seabass using stomach contents and stable isotope analyses at a monthly resolution over an annual cycle. We found significant, seasonally varying levels of individual specialization in stomach contents, with reduced specialization observed in the spring. This was corroborated by stable isotope analyses, where isotopic variance among seabass individuals was significantly higher compared to that in two other concurrently sampled, sympatric bentho-pelagic predators. Our findings suggest that juvenile seabass form trophic-generalist populations composed of specialized individuals. Considering variation in individual behaviours may improve management strategies aimed at protecting the vulnerable life stages of this commercially important species.

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“…To overcome these obstacles, some authors have used the cumulative sums method (Cusum, [7]) to analyze time series. Cusum charts and analysis are well established in the field of industrial process control ([[8], [9], [10]]) and more recently have gained popularity in environmental sciences, including aquatic biology ([11,12]), biogeochemistry ([13,14]), climate change ([[15], [16], [17]]), and in commercial software for time series analysis ([18]).…”

Section: Methods Detailsmentioning

confidence: 99%

Analyzing and comparing complex environmental time series using a cumulative sums approach

2019

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Climate influence on juvenile European sea bass (Dicentrarchus labrax, L.) populations in an estuarine nursery: A decadal overview

Cited by 27 publications

References 61 publications

Benthic estuarine communities' contribution to bioturbation under the experimental effect of marine heatwaves

Benthic estuarine communities' contribution to bioturbation under the experimental effect of marine heatwaves

Individual trophic specialization in juvenile European seabass: implications for the management of a commercially important species

Analyzing and comparing complex environmental time series using a cumulative sums approach

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