Hydrodynamic patterns favouring sea urchin recruitment in coastal areas: A Mediterranean study case

Farina, Simone; Quattrocchi, Giovanni; Guala, Ivan; Cucco, Andrea

doi:10.1016/j.marenvres.2018.05.013

Cited by 23 publications

(31 citation statements)

References 78 publications

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“…This finding differed from that observed for the tropical sea urchin Diadema aff. antillarum (Hernández et al 2010) and other echinoderms (e.g., Lamare and Barker 1999;Fabricius et al 2010) and highlights a need for exploring mechanistically how spatial and temporal variability in ocean circulation and phytoplankton productivity affect patterns of larval settlement. These outcomes do not suggest that food is not important for urchin larvae, only that interannual variation therein did not explain the interannual trends in settlement.…”

Section: Discussionmentioning

confidence: 99%

Effects of ocean climate on spatiotemporal variation in sea urchin settlement and recruitment

Okamoto

Schroeter

Reed

2020

Limnology & Oceanography

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Sea urchins are voracious herbivores that influence the ecological structure and function of nearshore ecosystems throughout the world. Like many species that produce planktonic larvae, their recruitment is thought to be particularly sensitive to climatic fluctuations that directly or indirectly affect adult reproduction and larval transport and survival. Yet how climate alters sea urchin populations in space and time by modifying larval recruitment and year‐class strength on the time‐scales that regulate populations remains understudied. Using a, spatially replicated weekly‐biweekly data set spanning 27 yr and 1100 km of coastline, we characterized seasonal, interannual, and spatial patterns of larval settlement of the purple sea urchin (Strongylocentrotus purpuratus). We show that large spatial differences in temporal patterns of larval settlement were associated with different responses to fluctuations in ocean temperature and climate. Importantly, we found a strong correlation between larval settlement and regional year class strength suggesting that such temporal and spatial variation in settlement plays an important role in controlling population dynamics. These results provide strong evidence over extensive temporal and spatial domains that climatic fluctuations shape broad‐scale patterns of larval settlement and subsequent population structure of an important marine herbivore known to control the productivity, community state, and provisioning services of marine ecosystems.

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Section: Discussionmentioning

confidence: 99%

Effects of ocean climate on spatiotemporal variation in sea urchin settlement and recruitment

Okamoto

Schroeter

Reed

2020

Limnology & Oceanography

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“…Collinearity among independent variables was evaluated by examining the variance inflation factors (VIFs). In this evaluation, variables were considered independent if VIF values were close to 1 and collinear when the value reached 10 or above (Allison 2012;Farina et al 2018;O'brien 2007). A value of p < 0.05 was chosen as the input and output values to identify the set of variables that were important in the description of the dependent variable.…”

Section: Physicochemical Variation and Its Influence On T-hg Content mentioning

confidence: 99%

“…A univariate multiple regression analysis was performed to determine which physicochemical variables of the water and sediment, including sediment T-Hg content, influenced the macroinvertebrate muscle's T-Hg content. Collinearity between the independent variables was evaluated by examining the VIFs (Allison 2012;Farina et al 2018;O'brien 2007). The same criteria as those used in the univariate multiple regression model described above were used here.…”

Section: Influence Of Sediment T-hg Concentration and Physicochemicalmentioning

confidence: 99%

Mercury dynamics in macroinvertebrates in relation to environmental factors in a highly impacted tropical estuary: Buenaventura Bay, Colombian Pacific

Gamboa-García

Duque

Cogua

et al. 2019

Environ Sci Pollut Res

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The environmental health of Buenaventura Bay, a highly impacted tropical estuary, is influenced by numerous human activities, including mining upstream. Large-and small-scale fishing plays an important role in the local economy, so we investigated the dynamic processes of bioaccumulation of mercury at basal trophic levels. Four samples were taken at each of the four locations in Buenaventura Bay during each of the four seasons of 2015. We measured the total mercury content (T-Hg, dry weight) in sediments and in muscle tissue across 17 macroinvertebrate species. The most abundant were the blue crab (C. arcuatus) and the mantis shrimp (S. aculeata aculeata). Blue crab showed an average muscle T-Hg value exceeding the limit of 0.2 g•g-1 , which is the maximum T-Hg level suggested for food consumption by vulnerable humans and populations: pregnant women, children, and the community that feeds from this source of protein on a daily basis. It was found that, 6.22% of individuals exceeded the 0.5 g•g-1 level, which is the maximum T-Hg level suggested for food consumption by the general population: the population that consumes it sporadically. Significantly high values of T-Hg in blue crab and mantis shrimp occurred during low salinity conditions in the estuary, suggesting that Hg mainly originates from river runoff during the rainy season. Nevertheless, the biota-sediment accumulation factor (BSAF) was favored in high salinity, which could mean greater availability of Hg for higher levels of the estuarine food web in the dry season and in marine waters. In general, the T-Hg levels in some samples exceeded 0.2 g•g −1. Therefore this pollutant must be monitored due to its biomagnification potential and as a threat to human health, especially that for the local population of fishermen and their families.

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“…In general, recruitment and predation are considered the main ecological processes driving P. lividus population dynamics and shaping population structure locally ( Fig.1; Sala & Zabala, 1996;Goñi et al, 2000). Larval supply is strongly influenced by coastal hydrodynamics (Fenaux, Cellario & Rassoulzadegan, 1988;Harmelin-Vivien et al, 2000;Prado et al, 2012;Farina et al, 2018), while the nature of the substrate, the type of habitat and the abundance of predatory fish strongly influence settlement success and post-settlement survival (Boudouresque & Verlaque, 2001;Tomas, Turon & Romero, 2004;Hereu et al, 2005;Oliva et al, 2016). Settlement on rocky habitats is generally higher than in seagrass Posidonia oceanica, where the abundance of cryptic predators determines a high mortality rate (Tomas, Turon & Romero, 2004).…”

Section: The Peninsula Of Sinis In the Central Western Coast Of Sardmentioning

confidence: 99%

“…Hereu et al, 2005;Farina et al, 2017). A circulation model of bottom current speed was used to approximate coastal hydrodynamics that strongly influence larval diffusion and sea urchin settlement (Farina et al, 2018). Finally, predatory fish abundance provides approximative information about potential predation activity along the fishing sectors (Guidetti, 2007).…”

Section: The Peninsula Of Sinis In the Central Western Coast Of Sardmentioning

confidence: 99%

Peer Review #1 of "The challenge of managing the commercial harvesting of the sea urchin Paracentrotus lividus: advanced approaches are required (v0.1)"

2020

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Sea urchins act as a keystone herbivore in marine coastal ecosystems, regulating macrophyte density, which offers refuge for multiple species. In the Mediterranean Sea, both the sea urchin Paracentrotus lividus and fish preying on it are highly valuable target species for artisanal fisheries. As a consequence of the interactions between fish, sea urchins and macrophyte, fishing leads to trophic disorders with detrimental consequences for biodiversity and fisheries. In Sardinia (Western Mediterranean Sea), regulations for sea urchin harvesting have been in place since the mid 90s. However, given the important ecological role of P. lividus, the single-species fishery management may fail to take into account important ecosystem interactions. Hence, a deeper understanding of population dynamics, their dependence on environmental constraints and multispecies interactions may help achieve long-term sustainable use of this resource. This work aims to highlight how sea urchin population structure varies spatially in relation to local environmental constraints and species interactions, with implications for their management. The study area (Sinis Peninsula, West Sardinia, Italy) that includes a Marine Reserve was divided into five sectors. These display combinations of the environmental constraints influencing sea urchin population dynamics, namely type of habitat (calcareous rock, granite, basalt, patchy and continuous meadows of Posidonia oceanica), average bottom current speed and predatory fish abundance. Size-frequency distribution of sea urchins under commercial size (< 5 cm diameter size) assessed during the period from 2004 to 2007, before the population collapse in 2010, were compared for sectors and types of habitat. Specific correlations between recruits (0-1 cm diameter size) and bottom current speeds

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Hydrodynamic patterns favouring sea urchin recruitment in coastal areas: A Mediterranean study case

Cited by 23 publications

References 78 publications

Effects of ocean climate on spatiotemporal variation in sea urchin settlement and recruitment

Effects of ocean climate on spatiotemporal variation in sea urchin settlement and recruitment

Mercury dynamics in macroinvertebrates in relation to environmental factors in a highly impacted tropical estuary: Buenaventura Bay, Colombian Pacific

Peer Review #1 of "The challenge of managing the commercial harvesting of the sea urchin Paracentrotus lividus: advanced approaches are required (v0.1)"

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