Particulate organic matter fluxes and hydrodynamics at the Tisler cold-water coral reef

Wagner, Hannes; Purser, Autun; Thomsen, Laurenz; Jesus, C.; Lundälv, Tomas

doi:10.1016/j.jmarsys.2010.11.003

Cited by 69 publications

(108 citation statements)

References 47 publications

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“…live stands, dead coral and rubble) would likely alter oxygen uptake rates (e.g. Wild et al 2009, Wagner et al 2011), but the approach here was to assess a bulk respiration rate for the CWC ecosystem and provide a first order estimate. There was evidence for significant seasonal variability in oxygen uptake rates, as might be expected.…”

Section: Discussionmentioning

confidence: 99%

Cold-water coral ecosystem (Tisler Reef, Norwegian Shelf) may be a hotspot for carbon cycling

White¹,

Wolff²,

Lundälv³

et al. 2012

Mar. Ecol. Prog. Ser.

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Cold-water coral (CWC) reefs are recognised as an important marine benthic ecosystem at continental margins. Where abundant, they most likely play a role both in the maintenance of biodiversity and in the provision of ecosystem services provided by shelf seas. Here, we directly measure the community respiration of a CWC reef on the Norwegian shelf and show that rates of oxygen uptake are high in summer ( ). Spring uptake rates are comparable to values at shelf sediments at similar water depths, while summer values are much higher. We calculate that with such high respiration rates, CWC reef ecosystems potentially turnover a significant proportion (~25%) of the annual shelf carbon export in the Norwegian Sea, where CWC reefs are abundant. The loss of CWCs through physical destruction or ocean acidification may have a significant impact on local carbon cycling in the mid-to high-latitude North Atlantic Ocean. KEY WORDS: Benthic community respiration · Cold-water corals · Lophelia pertusa · Carbon cyclingResale or republication not permitted without written consent of the publisher

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Section: Discussionmentioning

confidence: 99%

Cold-water coral ecosystem (Tisler Reef, Norwegian Shelf) may be a hotspot for carbon cycling

White¹,

Wolff²,

Lundälv³

et al. 2012

Mar. Ecol. Prog. Ser.

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“…It is located at a depth of 70 to 155 m in the Skagerrak, on a sill forming the submarine border between Norway and Sweden. The current velocity over the reef varies from 0 to 50 cm s −1 throughout the year while the flow direction fluctuates irregularly between NW and SE Wagner et al, 2011). The amount and quality of particulate organic carbon (POC) entering the reef depend on the location within the reef, and concentrations vary between 43 to 106 µg POC L −1 (Wagner et al, 2011).…”

Section: Sampling Location and Maintenancementioning

confidence: 99%

“…The current velocity over the reef varies from 0 to 50 cm s −1 throughout the year while the flow direction fluctuates irregularly between NW and SE Wagner et al, 2011). The amount and quality of particulate organic carbon (POC) entering the reef depend on the location within the reef, and concentrations vary between 43 to 106 µg POC L −1 (Wagner et al, 2011). Temperature at the reef site typically fluctuates between 6 and 9 • C throughout the year Wagner et al, 2011).…”

Section: Sampling Location and Maintenancementioning

confidence: 99%

Opportunistic feeding on various organic food sources by the cold-water coral <i>Lophelia pertusa</i>

et al. 2014

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Abstract. The ability of the cold-water coral Lophelia pertusa to exploit different food sources was investigated under standardized conditions in a flume. The tested food sources, dissolved organic matter (DOM, added as dissolved free amino acids), bacteria, algae, and zooplankton (Artemia) were deliberately enriched in 13 C and 15 N. The incorporation of 13 C and 15 N was traced into bulk tissue, fatty acids, hydrolysable amino acids, and the skeleton ( 13 C only) of L. pertusa. Incorporation rates of carbon (ranging from 0.8-2.4 µg C g −1 DW d −1 ) and nitrogen (0.2-0.8 µg N g −1 DW d −1 ) into coral tissue did not differ significantly among food sources indicating an opportunistic feeding strategy. Although total food assimilation was comparable among sources, subsequent food processing was dependent on the type of food source ingested and recovery of assimilated C in tissue compounds ranged from 17 % (algae) to 35 % (Artemia). De novo synthesis of individual fatty acids by L. pertusa occurred in all treatments as indicated by the 13 C enrichment of individual phospholipid-derived fatty acids (PLFAs) in the coral that were absent in the added food sources. This indicates that the coral might be less dependent on its diet as a source of specific fatty acids than expected, with direct consequences for the interpretation of in situ observations on coral nutrition based on lipid profiles.

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“…Cold-water coral reefs are often associated with elevated seabed features or areas where hydrodynamic conditions assist delivery of large volumes of refractory material, or pulses of labile material to the benthic ecosystem (Duineveld et al, 2004;Kiriakoulakis et al, 2005;Thiem et al, 2006;Kiriakoulakis et al, 2007;Davies et al, 2009;Rüggeberg et al, 2010;Wagner et al, 2011;Duineveld et al, 2012). Sizable reef structures can develop with successive generations of coral polyp growth (Mortensen et al, 1995;De Mol., 2002;Dorschel et al, 2005;Wheeler et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Dead coral polyps provide hard substrate for sessile filter-feeding organisms (López Correa et al, 2004), with the complexity of the reef morphology providing refuge for mobile organisms such as fish (Husebø et al, 2002;Costello et al, 2005;Ross and Quattrini, 2007;Ballion et al, 2012;D'Onghia et al, 2012), shrimp and other crustaceans (Reed et al, 1982;Mortensen et al, 1995;Krieger and Wing., 2002; Roberts et al, 2008;Le Guilloux et al, 2010;D'Onghia et al, 2012). Local hydrodynamic flow may be influenced by coral structure, enhancing or reducing local depositional rates across a reef, or entrapping suspended material in turbidity loops above the reef structure (Mortensen et al, 1995White, 2007;Wagner et al, 2011). Sediments dropping from suspension within and surrounding coral provide further microhabitats for meiofauna (Raes and Vanreusel, 2006;Bongiorni et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Microhabitat and shrimp abundance within a Norwegian cold-water coral ecosystem

et al. 2013

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Cold-water coral (CWC) reefs are heterogeneous ecosystems comprising numerous microhabitats. A typical European CWC reef provides various biogenic microhabitats (within, on and surrounding colonies of coral species such as Lophelia pertusa, Paragorgia arborea and Primnoa resedaeformis, or formed by their remains after death). These microhabitats may be surrounded and intermixed with non-biogenic microhabitats (soft sediment, hard ground, gravel/pebbles, steep walls). To date, studies of distribution of sessile fauna across CWC reefs have been more numerous than those investigating mobile fauna distribution. In this study we quantified shrimp densities associated with key CWC microhabitat categories at the Røst Reef, Norway, by analysing image data collected by towed video sled in June 2007. We also investigated shrimp distribution patterns on the local scale (<40 cm) and how these may vary with microhabitat. Shrimp abundances at the Røst Reef were on average an order of magnitude greater in biogenic reef microhabitats than in non-biogenic microhabitats. Greatest shrimp densities were observed in association with live Paragorgia arborea microhabitat (43 shrimp m⁻², SD = 35.5), live Primnoa resedaeformis microhabitat (41.6 shrimp m⁻², SD = 26.1) and live Lophelia pertusa microhabitat (24.4 shrimp m⁻², SD = 18.6). In non-biogenic microhabitat, shrimp densities were <2 shrimp m⁻². CWC reef microhabitats appear to support greater shrimp densities than the surrounding non-biogenic microhabitats at the Røst Reef, at least at the time of survey

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Particulate organic matter fluxes and hydrodynamics at the Tisler cold-water coral reef

Cited by 69 publications

References 47 publications

Cold-water coral ecosystem (Tisler Reef, Norwegian Shelf) may be a hotspot for carbon cycling

Cold-water coral ecosystem (Tisler Reef, Norwegian Shelf) may be a hotspot for carbon cycling

Opportunistic feeding on various organic food sources by the cold-water coral <i>Lophelia pertusa</i>

Microhabitat and shrimp abundance within a Norwegian cold-water coral ecosystem

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Particulate organic matter fluxes and hydrodynamics at the Tisler cold-water coral reef

Cited by 69 publications

References 47 publications

Cold-water coral ecosystem (Tisler Reef, Norwegian Shelf) may be a hotspot for carbon cycling

Cold-water coral ecosystem (Tisler Reef, Norwegian Shelf) may be a hotspot for carbon cycling

Opportunistic feeding on various organic food sources by the cold-water coral &lt;i&gt;Lophelia pertusa&lt;/i&gt;

Microhabitat and shrimp abundance within a Norwegian cold-water coral ecosystem

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Opportunistic feeding on various organic food sources by the cold-water coral <i>Lophelia pertusa</i>