Bathymetric segregation of sea urchins on reefs of the Canarian Archipelago: Role of flow-induced forces

Tuya, Fernando; Cisneros-Aguirre, J.; Ortega-Borges, L.; Haroun, Ricardo

doi:10.1016/j.ecss.2007.02.007

Cited by 80 publications

(56 citation statements)

References 28 publications

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“…Lissner 1980, Kawamata 1998, and sea urchins can be dislodged by even moderate water movement (e.g. Tuya et al 2007). Spatial variability in the influence of waves occurs due to depth and geomorphologic features that attenuate waves.…”

Section: Introductionmentioning

confidence: 99%

Intensity of herbivory on kelp by fish and sea urchins differs between inshore and offshore reefs

Vanderklift¹,

Lavery²,

Waddington³

2009

Mar. Ecol. Prog. Ser.

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Interactions between water motion, primary productivity, and herbivory are complex. Rates of grazing by fish on tropical coral reefs and by sea urchins on temperate rocky reefs are usually high, but can be low in areas of extreme water motion. Some herbivores can switch between mobile (grazing) and sedentary (drift-feeding) behaviours, and this can be influenced by water motion. We compared the relative consumption of the kelp Ecklonia radiata at rocky reefs in western Australia with different wave exposures (inshore versus offshore). No herbivory was recorded offshore, suggesting that wave exposure might inhibit herbivory. We also compared grazing by fish and sea urchins, and grazing versus drift-feeding pathways. Grazing by fish and sea urchins was low, except at one inshore reef where grazing by fish was intense. In contrast, drift-feeding by sea urchins was recorded at all inshore reefs, suggesting that this is a ubiquitous behaviour in the region. We measured productivity of E. radiata to determine if spatial patterns in rates of herbivory matched those of productivity. Productivity of E. radiata was higher on offshore reefs at one location. The observed difference in consumption between inshore and offshore reefs at both locations suggests that consumption is not limited by productivity, but by exposure. Further, the high productivity offshore combined with low rates of herbivory suggest that offshore reefs might be a source of kelp that subsidises other habitats.

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Section: Introductionmentioning

confidence: 99%

Intensity of herbivory on kelp by fish and sea urchins differs between inshore and offshore reefs

Vanderklift¹,

Lavery²,

Waddington³

2009

Mar. Ecol. Prog. Ser.

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“…In contrast, the abundance of both P. lividus and A. lixula recruits was not higher in those habitat patches where adults have been typically found in the study area, i.e. rocky substrates at shallow water dominated by macroalgal beds (Tuya et al, 2007). Most likely, Diadema recruits have a tendency to look for protection under the long-spined 'canopy' provided by adult conspecifics (Atkinson et al, 1973), and so increase their Medit.…”

Section: Discussionmentioning

confidence: 82%

“…two short-spined sea urchin species. Across the Canary Islands, these two sea-urchins have overall adult abundances considerably lower than D. africanum (Tuya et al, 2007), which is the species that majorly generates 'grazed urchin' barrens (Tuya et al, 2004;Clemente et al, 2007). The low abundances of both P. lividus and A. lixula do not seem to promote a 'canopy' effect on small-sized individuals, as a way to provide shelter to new recruits.…”

Section: Discussionmentioning

confidence: 99%

“…an 'oasis' effect: attraction of new individuals to the only available substrate (García-Sanz et al, 2012). Indeed, individuals of P. lividus can easily move among adjacent habitat patches (Ceccherelli et al, 2009), which could guarantee further arrival of individuals to favorable rocky substrates covered by macroalgae (Tuya et al, 2007). In conclusion, this study has demonstrated non-overlapping seasonal recruitment patterns of the less abundant species (P. lividus and A. lixula) with the most conspicuous species (D. africanum) of the study area.…”

Section: Discussionmentioning

confidence: 99%

“…Both P. lividus and A. lixula are well-adapted to the turbulent waters of the first few meters of the subtidal, while D. africanum commonly increases in abundance with depth (Tuya et al, 2007). The locally abundant D. africanum occurs in the Eastern Atlantic islands (Rodríguez et al, 2013), from Madeira to the Guinean Gulf, including the Salvage Islands, Canary Islands, Cape Verde Islands (Hernández et al, 2008), and Sâo Tome Island (Lessios et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Contrasting recruitment seasonality of sea urchin species in Gran Canaria, Canary Islands (eastern Atlantic)

2014

Self Cite

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Although sea-urchins can play an important role affecting the community structure of subtidal bottoms, factors controlling the dynamics of sea-urchin populations are still poorly understood. We assessed the seasonal variation in recruitment of three sea-urchin species (Diadema africanum, Paracentrotus lividus and Arbacia lixula) at Gran Canaria Island (eastern Atlantic) via monthly deployment of artificial collectors throughout an entire annual cycle on each of four adjacent habitat patches (seagrasses, sandy patches, 'urchin-grazed' barrens and macroalgal-dominated beds) within a shallow coastal landscape. Paracentrotus lividus and A. lixula had exclusively one main recruitment peak in late winter-spring. Diadema africanum recruitment was also seasonal, but recruits appeared in late summer-autumn, particularly on 'urchin-grazed' barrens with large abundances of adult conspecifics. In conclusion, this study has demonstrated non-overlapping seasonal recruitment patterns of the less abundant species (P. lividus and A. lixula) with the most conspicuous species (D. africanum) in the study area.

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Genetic monitoring of the declining European stony sea urchin Paracentrotus lividus from the central Bay of Biscay (Asturias, northwest Spain) and attempts to restore its wild populations

Parrondo

Rodríguez-López

et al. 2022

Aquatic Conservation

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Paracentrotus lividus is a sea urchin with an important ecological role in the Cantabrian Sea ecosystem, where its populations are in severe decline and the regional government has implemented a population restoration strategy with the aim of preserving this valuable marine resource. In this study, genetic monitoring was conducted for the first time in the central area of the southern Bay of Biscay to describe the genetic diversity patterns of P. lividus and to assess the potential impacts of conservation and mitigation actions on the wild gene pool. Genetic analyses were performed using the mitochondrial cytochrome b gene and microsatellite loci. Asturian localities showed significant genetic heterogeneity, possibly due to genetic drift, and seemed to constitute a differentiated management unit with regard to other areas of the species’ distribution. The genetic diversity analyses comparing wild samples with those subjected to restoration experiments did not show significant negative effects on restored localities. Sea urchins from hatcheries represented 3.5% of the total recaptured individuals (95% accuracy). Even when low hatchery contributions were detected in this work, the results pointed to the necessity of improving the initial autochthonous breeder genetic pool and the aquaculture strategies applied when restoring wild populations to avoid future unwanted negative effects on wild gene pools.

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Bathymetric segregation of sea urchins on reefs of the Canarian Archipelago: Role of flow-induced forces

Cited by 80 publications

References 28 publications

Intensity of herbivory on kelp by fish and sea urchins differs between inshore and offshore reefs

Intensity of herbivory on kelp by fish and sea urchins differs between inshore and offshore reefs

Contrasting recruitment seasonality of sea urchin species in Gran Canaria, Canary Islands (eastern Atlantic)

Genetic monitoring of the declining European stony sea urchin Paracentrotus lividus from the central Bay of Biscay (Asturias, northwest Spain) and attempts to restore its wild populations

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