Are clam-seagrass interactions affected by heatwaves during emersion?

Román, Marta; Gilbert, Franck; Viejo, Rosa M.; Román, Salvador; Troncoso, Jesús Souza; Vázquez, Elsa; Olabarria, Celia

doi:10.1016/j.marenvres.2023.105906

Cited by 7 publications

(3 citation statements)

References 56 publications

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“…Thus, heatwaves can be expected to cause significant mortality levels in R. philippinarum and R. decussatus if they occur immediately after intensive spawning events; however, the presence of seagrass (e.g., Z. noltei) buffers the increase in sediment temperature caused by exposure to solar radiation during emersion [65,66], thus helping to mitigate the thermal stress in some species, such as R. decussatus [65]. Furthermore, this interaction may have other positive effects, such as allowing clams to burrow to shallower depths below Z. noltei [66], which implies less energy expenditure [43].…”

Section: Discussion: Consequences For Shellfisheriesmentioning

confidence: 99%

“…Thermal stress was applied during simulated low tides, for 4 h, on 4 consecutive days. The variables measured in bivalves were shell growth and burrowing activity (for more details see [66]).…”

Section: Methodsmentioning

confidence: 99%

“…This is the case of seagrass meadows that cover areas of shellfish beds to some extent, favouring climate mitigation and coastal system resilience ( [65]), and enhancing the productivity of fisheries (e.g., [64]). For example, the intertidal seagrass Zostera noltei Hornemann, can have positive effects on the physiological performance of bivalves exposed to thermal stress during emersion [65] and can reduce the risk of predation in stressed bivalves [66]. Due to the positive effects of these interactions, seagrass conservation and management actions within shellfish beds may help to mitigate the effects of climate change on this commercially important resource.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Risks Associated with Extreme Climate Events in Small-Scale Bivalve Fisheries: Conceptual Maps for Decision-Making Based on a Review of Recent Studies

Domínguez

Olabarria

Vázquez

2023

JMSE

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Extreme climate events, such as heatwaves and torrential rain, affect the physiology and functioning of marine species, especially in estuarine habitats, producing severe ecological and socioeconomic impacts when the affected species support important fisheries, such as artisanal shellfisheries. Studies of the impact of sudden decreases in salinity and increases in temperature were reviewed with the aim of producing comprehensive conceptual maps to aid the management of fisheries of the native clams Ruditapes decussatus and Venerupis corrugata, the introduced Ruditapes philippinarum, and the cockle Cerastoderma edule in Galicia (NW Spain). The maps show the effects on mortality, scope for growth, ability to burrow, changes in gonad development or predation risk. While V. corrugata will generally be more affected by low salinity (5 to 15) or high temperature (30 °C) during only two tidal cycles, C. edule populations may recover. Both species are also expected to become more vulnerable to predators. The clams R. philippinarum and R. decussatus will be more resistant, unless extreme events occur after massive spawning episodes; however, the presence of the intertidal seagrass Zostera noltei may buffer the negative effects of high sediment temperature on the growth of some species, such as R. decussatus. Finally, recommendations for assessing climate risk and designing management actions for shellfisheries are given.

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Section: Discussion: Consequences For Shellfisheriesmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of Risks Associated with Extreme Climate Events in Small-Scale Bivalve Fisheries: Conceptual Maps for Decision-Making Based on a Review of Recent Studies

Domínguez

Olabarria

Vázquez

2023

JMSE

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Increased Frequency of Sediment Heatwaves in a Virginia Seagrass Meadow

Tassone,

Pace

2023

Estuaries and Coasts

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Recovery of the Seagrass Zostera noltei and Commercial Bivalve Populations After Shellfish Harvesting

Román,

Vázquez,

Simón

et al. 2024

Estuaries and Coasts

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Conservation efforts have raised awareness about the impact of small-scale fisheries on the distribution of seagrass plants. The patterns of recovery of the seagrass Zostera noltei and of the commercial bivalves Cerastoderma edule, Ruditapes decussatus and Ruditapes philippinarum after shellfish harvesting were studied in a field experiment in a shellfish bed in NW Spain. Sample plots were subjected to a single disturbance in two types of shellfish harvesting treatments in three zones characterized by different harvesting frequency and seagrass density. The photosynthetic efficiency (Fv/Fm), shoot density, leaf length and carbohydrate content of Z. noltei were monitored every three months during one year, and the C and N content of leaves and biomass of plants were measured one year after the disturbance. The abundance of adults, juveniles and recruits and the condition index of adult bivalves were quantified after the experimental harvesting. Shoot density and biomass of Z. noltei remained low during the ten months after the disturbance but recovered to control values after one year. Carbohydrate contents of apical rhizomes were lower in disturbed (treated) plots, whereas no effect was observed on Fv/Fm. Denser and more complex seagrass patches recovered faster. The abundance of adult bivalves below commercial size was lower in the disturbed plots, while the abundance of adults of commercial size, juveniles and recruits did not vary, indicating that abundance and condition were not hampered by harvesting pressure. The findings also suggest that Z. noltei meadows can recover within one year of the impact of shellfish harvesting if the havesting areas are rotated and dense patches are preserved.

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Are clam-seagrass interactions affected by heatwaves during emersion?

Cited by 7 publications

References 56 publications

Assessment of Risks Associated with Extreme Climate Events in Small-Scale Bivalve Fisheries: Conceptual Maps for Decision-Making Based on a Review of Recent Studies

Assessment of Risks Associated with Extreme Climate Events in Small-Scale Bivalve Fisheries: Conceptual Maps for Decision-Making Based on a Review of Recent Studies

Increased Frequency of Sediment Heatwaves in a Virginia Seagrass Meadow

Recovery of the Seagrass Zostera noltei and Commercial Bivalve Populations After Shellfish Harvesting

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