Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Reed, Adam J.; Morris, James P.; Linse, Katrin; Thatje, Sven

doi:10.1016/j.dsr.2013.07.006

Cited by 10 publications

(7 citation statements)

References 65 publications

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“…Incomplete specimens (those without heads) were not counted, to prevent over-estimating their density. Feeding modes were determined by morphology, and validated against taxonomic keys (Fauchald, 1977;Fauchald and Jumars, 1979;Barnard and Karaman, 1991;Beesley et al, 2000;Smirnov, 2000;Poore, 2001;Kilgallen, 2007;Keuning et al, 2011;Reed et al, 2013;Jumars et al, 2015), the Ocean Biogeographic Information System (OBIS) and studies from similar areas/ environments that have conducted stable isotope analyses (Fauchald and Jumars, 1979;Mincks et al, 2008;Levin et al, 2009).…”

Section: Sample Collection and Processingmentioning

confidence: 99%

Macrofaunal Ecology of Sedimented Hydrothermal Vents in the Bransfield Strait, Antarctica

et al. 2016

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Sedimented hydrothermal vents, where hot, mineral-rich water flows through sediment, are poorly understood globally, both in their distribution and the ecology of individual vent fields. We explored macrofaunal community ecology at a sediment-hosted hydrothermal vent in the Southern Ocean. This is the first such study of these ecosystems outside of the Pacific and the furthest south (62 • S) of any vent system studied. Sedimentary fauna were sampled in four areas of the Bransfield Strait (Southern Ocean), with the aim of contrasting community structure between vent and non-vent sites. Macrofaunal assemblages were clearly distinct between vent and non-vent sites, and diversity, richness, and density declined toward maximum hydrothermal activity. This variation is in contrast to observations from similar systems in the Pacific and demonstrates the influence of factors other than chemosynthetic primary productivity in structuring infauna at deep-sea vent communities. Vent endemic fauna had limited abundance and were represented by a single siboglinid species at hydrothermally active areas, meaning that that the majority of local biota were those also found in other areas. Several taxa occupied all sampling stations but there were large differences in their relative abundances, suggesting communities were structured by niche variation rather than dispersal ability.

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Section: Sample Collection and Processingmentioning

confidence: 99%

Macrofaunal Ecology of Sedimented Hydrothermal Vents in the Bransfield Strait, Antarctica

et al. 2016

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“…Although protobranch bivalves are important bioturbators in the deep sea (Zardus 2002), they remain one of the least studied molluscan groups (Sharma et al 2013;Reed et al 2014). Protobranch bivalves are well represented in the Antarctic, but information regarding the ecology of Protobranchia in the Southern Ocean is limited as most species are found only in deeper water (Reed et al 2013b). One exception is the common shallow-water species Aequiyoldia eightsii (Jay, 1939) (previously Yoldia eightsii), which has been used as a model bivalve species in several investigations.…”

Section: Introductionmentioning

confidence: 99%

The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns

et al. 2018

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The accepted paradigm for reproduction in Antarctic marine species is one where oogenesis takes 18 months to 2 years, and a bimodal egg-size distribution where two cohorts of eggs are present in female gonads throughout the year. These slow gametogenic traits are driven by low temperature and/or the restriction of resource availability because of extreme seasonality in the marine environment. Here we present data on the reproductive ecology of the common Antarctic bivalve Aequiyoldia eightsii (Jay, 1839) (Protobranchia: Sarepidae) from monthly samples collected between January 2013 and May 2014 at Hangar Cove, Rothera Point on the West Antarctic Peninsula. These data show that A. eightsii is unusual because it does not follow the typical pattern expected for reproduction in Antarctic marine invertebrates, and differs also from closely related nuculanid protobranch bivalves with respect to gametogenic duration and reproductive periodicity. Continuous oogenesis, evidenced by the year-round occurrence of previtellogenic, vitellogenic, and ripe oocytes in female gonads, is supplemented by a seasonal increase in reproductive intensity and spawning in Austral winter (April-May), evidenced by the loss of mature spermatozoa and ripe oocytes from males and females, respectively. The simultaneous occurrence of these contrasting traits in individuals is attributed to a flexible feeding strategy (suspension and deposit feeding) in response to seasonal changes in food supply characteristic of the Antarctic marine environment. Asynchrony between individual females is also notable. We hypothesise that the variability may represent a trade-off between somatic and reproductive growth, and previously reported internal interannual cycles in shell growth.

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“…In chemosynthetic ecosystems, such as hydrothermal vents and cold seeps, where the energy availability is high compared to that in the surrounding deep sea area 45 , 46 , the growth rates of chemosynthetic taxa (e.g., Bathymodiolus thermophilus , Calyptogena magnifica , and Riftia pachyptila ) were shown to be in the same range of those of shallower species (a few cm per year) 47 – 49 . However, for other deep-sea bivalves from nonchemosynthetic ecosystems, such as the deep-sea protobranch bivalves, growth rates were shown to be much lower, with a range of 1 to a few mm per year 50 . Deep-sea bivalves are generally small and slow-growing 51 .…”

Section: Discussionmentioning

confidence: 99%

Inferring functional traits in a deep-sea wood-boring bivalve using dynamic energy budget theory

Gaudron

Lefebvre

Marques

2021

Sci Rep

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For species in the deep sea, there is a knowledge gap related to their functional traits at all stages of their life cycles. Dynamic energy budget (DEB) theory has been proven to be an efficient framework for estimating functional traits throughout a life cycle using simulation modelling. An abj-DEB model, which compared with the standard DEB model includes an extra juvenile stage between the embryo and the usual juvenile stages, has been successfully implemented for the deep-sea Atlantic woodeater Xylonora atlantica. Most of the core and primary parameter values of the model were in the range of those found for shallow marine bivalve species; however, in comparison to shallow marine bivalves, X. atlantica required less energy conductance and energy to reach the puberty stage for the same range of body sizes, and its maximum reserve capacity was higher. Consequently, its size at first reproduction was small, and better survival under starvation conditions was expected. A series of functional traits were simulated according to different scenarios of food density and temperature. The results showed a weak cumulative number of oocytes, a low growth rate and a small maximum body size but an extended pelagic larval duration under deep-sea environmental conditions. Moreover, DEB modelling helped explain that some male X. atlantica individuals remain dwarfs while still reproducing by changing their energy allocation during their ontogenetic development in favour of reproduction. The estimation of functional traits using DEB modelling will be useful in further deep-sea studies on the connectivity and resilience of populations.

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Plasticity in shell morphology and growth among deep-sea protobranch bivalves of the genus Yoldiella (Yoldiidae) from contrasting Southern Ocean regions

Cited by 10 publications

References 65 publications

Macrofaunal Ecology of Sedimented Hydrothermal Vents in the Bransfield Strait, Antarctica

Macrofaunal Ecology of Sedimented Hydrothermal Vents in the Bransfield Strait, Antarctica

The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns

Inferring functional traits in a deep-sea wood-boring bivalve using dynamic energy budget theory

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