Seamounts and organic matter—Is there an effect? The case of Sedlo and Seine Seamounts: Part 1. Distributions of dissolved and particulate organic matter

Vilas, Juan Carlos; Arı́stegui, Javier; Kiriakoulakis, Kostas; Wolff, George A.; Espino, Minerva; Polo, Irene; Montero, María F.; Mendonça, Ana

doi:10.1016/j.dsr2.2008.12.023

Cited by 36 publications

(23 citation statements)

References 63 publications

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“…The transport would be more pronounced during the periods of higher upwelling intensity, decreasing the concentrations toward the open ocean because of remineralization processes. Vilas et al [2009] reached the same conclusion after studying the distribution of POM around Seine, a seamount placed east of Madeira Island, in the Canary Current. These authors observed peaks of POC in the 200–1000 m layer at the stations closer to the continental shelf and coinciding with the highest activity of the upwelling system.…”

Section: Discussionmentioning

confidence: 57%

Lateral POC transport and consumption in surface and deep waters of the Canary Current region: A box model study

Alonso-González

Arı́stegui

Vilas

et al. 2009

Global Biogeochemical Cycles

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[1] We have estimated the lateral transport and consumption, from surface to 3000 m, of suspended particulate organic carbon (POC), through a box model approach, in the Canary Current region (subtropical northeast Atlantic). Our results show that lateral POC fluxes are up to 3 orders of magnitude higher than vertical fluxes. In the mesopelagic ocean, the central waters (100-700 m) presented a net carbon consumption of 8.51 Â 10 8 mol C d À1 with the highest POC entering through the more coastal section. This lateral flux accounted for 28-59% of the total mesopelagic respiration (R), on the basis of lower and upper case scenarios of vertical POC inputs and dissolved organic carbon contribution to R. We suggest that boundary currents may support higher lateral export of coastally produced POC than previously assumed. A large fraction of this POC would, however, be remineralized in the upper 1000 m instead of being transported to the ocean interior.Citation: Alonso-González, I. J., J. Arístegui, J. C. Vilas, and A. Hernández-Guerra (2009), Lateral POC transport and consumption in surface and deep waters of the Canary Current region: A box model study, Global Biogeochem. Cycles, 23, GB2007,

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Section: Discussionmentioning

confidence: 57%

Lateral POC transport and consumption in surface and deep waters of the Canary Current region: A box model study

Alonso-González

Arı́stegui

Vilas

et al. 2009

Global Biogeochemical Cycles

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“…Moreover, recent studies by Kiriakoulakis et al. (2009) and Vilas et al. (2009) demonstrate varied sources of organic matter for seamount ecosystems encompassing advected allochthonous material, passive sinking or downwelling of locally produced phytoplankton, and/or in situ production.…”

Section: A Critical Evaluation Of Historical Paradigms In Seamount Ecmentioning

confidence: 99%

“…Hirch et al (2009) and Hirch & Christiansen (2010) found no equivocal support for the latter and propose that horizontal advection of smaller zooplankton is energetically more important than trophic transfer of vertically migrating zooplankton, at least for some fish consumers at seamounts. Moreover, recent studies by Kiriakoulakis et al (2009) and Vilas et al (2009) demonstrate varied sources of organic matter for seamount ecosystems encompassing advected allochthonous material, passive sinking or downwelling of locally produced phytoplankton, and ⁄ or in situ production.…”

Section: Seamount Ecosystems Are Highly Productivementioning

confidence: 99%

Paradigms in seamount ecology: fact, fiction and future

et al. 2010

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Despite a relatively short history, the field of seamount ecology is rife with ecological paradigms, many of which have already become cemented in the scientific literature and in the minds of advocates for seamount protection. Together, these paradigms have created a widely held view of seamounts as unique environments, hotspots of biodiversity and endemicity, and fragile ecosystems of exceptional ecological worth. However, closer examination reveals significant gaps in our knowledge, thereby calling the accuracy of some of these paradigms into question. Here, we review the evolution of the major paradigms in seamount ecology, assess their status against the weight of existing evidence to date, identify emerging paradigms, and suggest future research directions. We find the assertions that seamount communities are vulnerable to fishing, and that these communities have high sensitivity and low resilience to bottom trawling disturbance are well supported by existing data. We find plausible evidence that seamounts are stepping stones for dispersal, oases of abundance and biomass, and hotspots of species richness. Nonetheless, the poor sampling coverage of these discrete but globally distributed environments prevents us from accepting these ideas as paradigms. Also plausible, but requiring further investigation, are the emerging paradigms that seamount communities are structurally distinct, that populations of invertebrates on seamounts are the source of propagules for nearby slope sinks, and that seamounts have acted and can act as biological refugia from large‐scale catastrophic environmental events. In contrast, the generalizations that seamounts are island habitats with highly endemic faunas that comprise unique communities distinct in species composition from other deep‐sea habitats, and that they have high production supported by localized bottom‐up forcing, are not supported by the weight of existing evidence.

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“…This spatial heterogeneity in particle flux at the microhabitat scale could explain differences observed in coral growth rates on a seamount. Large intra-seamount variability in POC concentrations and plankton biomass has also been recorded at the Sedlo and Seine Seamounts located in subtropical waters of the northeast Atlantic Ocean, related to differences in local circulation around the seamount (Vilas et al 2009). …”

Section: Variability In Growth Ratesmentioning

confidence: 99%

“…Isotopic evidence indicates that antipatharian corals feed on suspended matter derived from surface production (Roark et al 2006, Sherwood et al 2008, which can be influenced by local hydrographic patterns. In the Azores, information on near-bottom oceanographic conditions (currents, temperatures, and biogeochemical parameters) is scarce and regional models provide only coarse information; however, there is evidence that current circulation and local upwelling− downwelling patterns around seamounts are distinct from the surrounding ocean in the Northeast Atlantic Ocean, producing a diverse and complex physical environment (Vilas et al 2009, Mendonça et al 2012. Preliminary data on particulate organic carbon (POC) influx for Condor Seamount suggest that POC concentrations can be nearly 2 orders of magnitude greater on the northern slope relative to the southern slope (A. Colaço pers.…”

Section: Variability In Growth Ratesmentioning

confidence: 99%

Variability in growth rates of long-lived black coral Leiopathes sp. from the Azores

Carreiro‐Silva¹,

Andrews²,

Braga-Henriques³

et al. 2013

Mar. Ecol. Prog. Ser.

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Five colonies of black coral Leiopathes sp. were collected as bycatch from depths of 293 to 366 m from the Condor, Açor, and Voador seamounts (Azores region). The colonies had axial diameters between 4.9 and 33.1 mm and heights between 43 and 175 cm. Their ages and radial growth rates were estimated using radiocarbon dating. Results indicated that the smallest and largest colonies had similar radial growth rates of 5 to 7 µm yr −1 , whereas the other 3 colonies had grown more rapidly by a factor of 3 to 5 at ~20 to 30 µm yr −1. Colony lifespan ranged between 265 ± 90 and 2320 ± 90 yr. Fine-scale sampling along a radial transect from the edge to the center of the 2320 yr old Leiopathes sp. revealed variable growth rates throughout the colony lifespan. Slower radial growth rates of ~4 to 5 µm yr −1 were recorded over the initial 1600 yr and the last 300 yr of its life span, and a period of more rapid growth (20 µm yr −1 ) over the intermediate 400 yr of its life. Variability in radial growth rates among colonies resulted in colony ages that were not linearly correlated to colony axis diameter or height. Our findings of great longevity and slow growth rates for Leiopathes sp. agree with other Leiopathes sp. age and growth studies, indicating that colony and population recovery from damage or removal may take centuries to millennia. KEY WORDS: Antipatharia · Cold-water corals · Deep-sea · Growth · Longevity · Radiocarbon · Northeast AtlanticResale or republication not permitted without written consent of the publisher OPEN PEN

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Seamounts and organic matter—Is there an effect? The case of Sedlo and Seine Seamounts: Part 1. Distributions of dissolved and particulate organic matter

Cited by 36 publications

References 63 publications

Lateral POC transport and consumption in surface and deep waters of the Canary Current region: A box model study

Lateral POC transport and consumption in surface and deep waters of the Canary Current region: A box model study

Paradigms in seamount ecology: fact, fiction and future

Variability in growth rates of long-lived black coral Leiopathes sp. from the Azores

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