The ecological role of brachiopods in the Namuncurá MPA/Burdwood Bank, off southern South America

Gordillo, Sandra; Bayer, María Sol; Aranzamendi, María Carla de; Taverna, Anabela; Morán, Gisela A.

doi:10.1007/s12526-019-00935-1

Cited by 8 publications

(6 citation statements)

References 38 publications

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“…Specific studies regarding sedimentation rates, sediment traps, and continuous physico-chemical parameters have been developed since 2018 at Burdwood Bank, and these promising results will help, in the near future, to understand the particularities of the region and the mechanisms of particle transport in the water column to the bottom. Nonetheless, the benthic communities found on the Burdwood Bank slope are similar to those described for northern sectors on the Argentinean slope (see Portela et al, 2012Portela et al, , 2015Schejter et al, 2018), which evi- Asteroidea (Fraysse, Calcagno, & Pérez, 2018), brachiopods (Gordillo, Bayer, de Aranzamendi, Taverna, & Morán, 2019), molluscs (Di Luca & Zelaya, 2019), and polychaetes , and the distribution and reproduction of some fishes have been also reported by García Alonso, Brown, Martín, Pájaro, and Capitanio (2018). Several new species have also been discovered in this area (Schejter, Bertolino, & Calcinai, 2017;Güller & Zelaya, 2017;Urcola & Zelaya, 2018;López Gappa, Liuzzi, & Zelaya, 2018), and many more are undergoing the description process.…”

Section: Discussionsupporting

confidence: 70%

“…Nonetheless, the benthic communities found on the Burdwood Bank slope are similar to those described for northern sectors on the Argentinean slope (see Portela et al, , ; Schejter et al, ), which evidences a continuous habitat in which the Malvinas (Falkland) Current flows. Some important results obtained from the study of the samples taken during the Argentinean research cruises between 2013 and 2018 are the inventories of ascidians (Taverna et al, ), Asteroidea (Fraysse, Calcagno, & Pérez, ), brachiopods (Gordillo, Bayer, de Aranzamendi, Taverna, & Morán, ), molluscs (Di Luca & Zelaya, ), and polychaetes (Bremec et al, ), and the distribution and reproduction of some fishes have been also reported by García Alonso, Brown, Martín, Pájaro, and Capitanio (). Several new species have also been discovered in this area (Schejter, Bertolino, & Calcinai, ; Güller & Zelaya, ; Urcola & Zelaya, ; López Gappa, Liuzzi, & Zelaya, ), and many more are undergoing the description process.…”

Section: Discussionmentioning

confidence: 99%

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Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Schejter

Genzano

Gaitán

et al. 2020

Aquatic Conservation

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The characterization of benthic communities at the Burdwood Bank slope (≥200 m depth) is provided, comprising data from the marine protected area (MPA) Namuncurá II (created in December 2018), as well as from some deep bathyal surrounding areas in the Southwest Atlantic Ocean. This information was acquired during two research cruises with RV Puerto Deseado (Argentina) during 2016 and 2017. Marine animal forests were detected in the study area: coral gardens, mainly composed of alcyonaceans, were detected in the south and west of Burdwood Bank (MPA Namuncurá II) and neighbouring areas, whereas pennatulacean aggregations were detected in the north‐west of the plateau. The three‐dimensional structures of live but also dead corals provide substrate and refuge to many associated species. Benthic communities dominated by sponges were also recorded between 200 and 300 m in depth. Six sites that meet the characteristics of vulnerable marine ecosystems (VMEs) are reported. Conservation strategies applied to scarcely known austral Argentinean waters led to the establishment of a pioneer MPA (Namuncurá I). Following the management plan that aimed to establish the biodiversity of Namuncurá I and neighbouring areas, the area of protection has now been enlarged to include the southern slope of the bank (currently Namuncurá II), where marine animal forests were detected, at depths below 200 m. The data presented here provide empirical evidence to support the conservation value of the region.

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Section: Discussionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Schejter

Genzano

Gaitán

et al. 2020

Aquatic Conservation

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“…It can be used to describe the colonization of inorganic, dead organic and live organic substrates, including cases of biotic interactions between colonizers and colonized organisms and those without such interactions. If the colonized substrate is a living organism, biotic interactions between colonizers and colonized substrate can be Likewise, the usage of sclerobiosis will be appropriate for studies encompassing several life habits, such as motile organisms, encrusters, and borers mentioned as species associated with different substrates colonized (e.g., Reiss et al, 2003;Williams & McDermott, 2004) or encrusting/epibionts, nestlers, drillholes, and other bioerosional traces (e.g., Vinn, 2017;Romero et al, 2018;Gordillo et al, 2019). Most modern studies of hard substrate colonization consider only fouling and epibiosis.…”

Section: Why Sclerobiosis?mentioning

confidence: 99%

Sclerobiosis: A Term for Colonization of Marine Hard Substrates

Romero¹,

Casadı́o²,

Bremec³

et al. 2022

Ameghiniana

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“…Likewise, the oceanic NMPA holds high benthic biodiversity, particularly invertebrates with high endemism for this area [39], including cold water corals [40,41] and Asteroidea [42]. A recent study highlighted the key role of brachiopods in providing benthic refuge, food and substrate for other organisms in the NMPA [43]. Further, the area provides spawning and nursery habitat for important commercial fish species, such as the Patagonian sprat (Sprattus fuegensis) and the Patagonian toothfish (Dissostichus eleginoides) [44,45,46].…”

Section: Introductionmentioning

confidence: 99%

Microbial plankton configuration in the epipelagic realm from the Beagle Channel to the Burdwood Bank, a Marine Protected Area in Sub-Antarctic waters

et al. 2020

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Marine microbial plankton hold high structural and functional diversity, however, highresolution data are lacking in a large part of the Global Ocean, such as in subpolar areas of the SW Atlantic. The Burdwood Bank (BB) is a submerged plateau (average depth 100 m) that constitutes the westernmost segment of the North Scotia Ridge (54˚-55˚S; 56˚-62˚W). The BB hosts rich benthic biodiversity in low chlorophyll waters of the southern Patagonian Shelf, Argentina, declared Namuncura ´Marine Protected Area (NMPA) in 2013. So far, the pelagic microorganisms above the bank have not been described. During austral summer 2016, we assessed the microbial plankton (0.2-200 μm cell size) biomass and their taxonomical and functional diversity along a longitudinal transect (54.2-55.3˚S, 58-68˚W) from the Beagle Channel (BC) to the BB, characterized by contrasting hydrography. Results displayed a marked zonation in the composition and structure of the microbial communities. The biomass of phytoplankton >5 μm was 28 times higher in the BC, attributed mainly to large diatom blooms, than in oceanic waters above the BB, where the small coccolithophore Emiliania huxleyi and flagellates <10 μm dominated. In turn, the biomass of microheterotrophs above the BB doubled the biomass in the BC due to large ciliates. Notably, toxic phytoplankton species and their phycotoxins were detected, in particular high abundance of Dinophysis acuminata and pectenotoxins above the bank, highlighting their presence in open subpolar regions. Picophytoplankton (<2 μm), including Synechococcus and picoeukaryotes, were remarkably important above the BB, both at surface and deep waters (up to 150 m). Their biomass surpassed by 5 times that of phytoplankton > 5 μm, emphasizing the importance of small-sized phytoplankton in low chlorophyll waters. The homogeneous water column and high retention above the bank seem to favor the development of abundant picophytoplankton and microzooplankton communities. Overall, our findings unfold the plankton configuration in the Southern Patagonian Shelf, ascribed as a sink for anthropogenic CO 2 , and highlight

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The ecological role of brachiopods in the Namuncurá MPA/Burdwood Bank, off southern South America

Cited by 8 publications

References 38 publications

Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Sclerobiosis: A Term for Colonization of Marine Hard Substrates

Microbial plankton configuration in the epipelagic realm from the Beagle Channel to the Burdwood Bank, a Marine Protected Area in Sub-Antarctic waters

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