Efficient crushing of hard benthic diatoms in the gut of the Manila clam Ruditapes philippinarum – Experimental and observational evidence

Houki, Shouji; Kawamura, Tomohiko; Ogawa, Norio; Watanabe, Yoshirô

doi:10.1016/j.jembe.2018.04.007

Cited by 6 publications

(6 citation statements)

References 46 publications

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“…In contrast, primarily benthic taxa, most notably Navicula (but also Halamphora ) increased in relative abundance. It is generally recognized that planktonic diatoms tend to be lightly silicified whereas frustules of benthic diatoms are heavily silicified (Conley et al, 1989; Houki et al, 2018). Disparate selective forces, for example, the ability to float vs. defend against abrasion in sediments, could explain this pattern (Houki et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…It is generally recognized that planktonic diatoms tend to be lightly silicified whereas frustules of benthic diatoms are heavily silicified (Conley et al, 1989; Houki et al, 2018). Disparate selective forces, for example, the ability to float vs. defend against abrasion in sediments, could explain this pattern (Houki et al, 2018). Feeding studies suggest that weak silicification corresponds to higher digestive susceptibility, for example, in copepods (Friedrichs et al, 2013; Pančič et al, 2019) and suspension‐feeding clams (Houki et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…A smaller subset of studies has demonstrated that feeding by macroinvertebrates can alter the community composition of MPB (Hagerthey et al, 2002; Plante & Busby, 2011; Smith et al, 1996). In particular, MPB community shifts have been associated with mollusks employing a variety of feeding modes including deposit feeding (Connor & Edgar, 1982; Hagerthey et al, 2002), suspension feeding (Cognie et al, 2001; Houki et al, 2018), and grazing on hard substrata (Nicotri, 1977). Changes in composition could represent selective feeding (Connor & Edgar, 1982), differential digestion (Kawamura et al, 1998), or some combination of these mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Feeding effects of the keystone deposit feeder Ilyanassa obsoleta (Neogastropoda, Gastropoda) on sedimentary diatoms

Plante

Hill‐Spanik

Emerson

2023

Journal of Phycology

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Microphytobenthos (MPB), typically comprised mainly of diatoms, is a key contributor to nearshore energy flow and nutrient cycles. Deposit-feeding invertebrates are known to alter the structure and activity of MPB. The eastern mud snail Ilyanassa obsoleta can reach extremely high densities in estuaries of the northwestern Atlantic, and their deposit-feeding and locomotion strongly influence other invertebrates and microbes. Our objective was to explore quantitative and qualitative effects of this keystone deposit-feeder on diatoms of intertidal sediments. We gathered snails from mudflat and sandflat habitats and collected their fresh fecal pellets in the laboratory. DNA metabarcoding allowed us to characterize diatom assemblages of ingested sediments and feces. We noted selective feeding such that reduction in MPB biomass with gut passage was difficult to quantify. Diatom α-diversity was reduced with gut passage in snails from both sedimentary regimes. Mudflat and sandflat diatom assemblages were distinct and differed markedly between feces and sediment in mud-feeding snails, whereas the difference in sand-feeding snails was minor. The sandy habitat was dominated by a mix of epipelic and epipsammic diatoms. In contrast, mudflat samples were dominated by epipelic and planktonic diatoms. Compositional differences between sediment and feces reflected preferential removal of planktonic taxa. Our results suggest the importance of phytodetritus to the mud snail diet, particularly in hydrodynamically quiescent environments. Due to the natural spatial patchiness of the snails and the capacity for rapid microbial recolonization, field experiments are recommended to determine whether MPB community changes attributed to gut passage are manifested at the landscape scale.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Feeding effects of the keystone deposit feeder Ilyanassa obsoleta (Neogastropoda, Gastropoda) on sedimentary diatoms

Plante

Hill‐Spanik

Emerson

2023

Journal of Phycology

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“…After dehydration through a series of ethanol, xylene, and paraffin, the specimens were transferred to holding slides and then cooled to let the paraffin solidify. Subsequently, specimens for SEM were prepared following the method of Houki et al (2018). The paraffin blocks containing specimens were sliced using a 10-µm microtome to expose stomach contents.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

Flexible herbivory of the euryhaline mysid <i>Neomysis awatschensis</i> in the microtidal Yura River estuary, central Japan

Omweri

Suzuki

Houki

et al. 2021

Plankton Benthos Res

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“…They play key roles in the sustainability of the littoral ecosystems (cf. Cox et al, 2020) including suspension feeders, thanks to their prominent place in the food web as primary producers (Houki et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

A New Insight Into Amicula, a Genus of Tiny Marine Benthic Diatoms With the Description of Two New Tropical Species and the Largest Mitogenome Known for a Stramenopile

Gastineau

Ashworth

et al. 2022

Front. Mar. Sci.

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The current article focuses on the morphological and molecular characterization of the often inconspicuous genus Amicula. This recently erected genus from brackish and marine sediments was monotypic but here we describe two new tropical species: Amicula micronesica sp. nov. and Amicula vermiculata sp. nov. Once considered an incertae sedis genus regarding its higher rank taxonomy, its position among the family Diploneidaceae is proposed here by molecular phylogenetics. The complete plastid and mitochondrial genomes of Amicula micronesica sp. nov. are also presented here. It appears that the 177614-bp long mitogenome is the biggest yet recorded among stramenopiles, due to its invasion by 57 introns. Moreover, it utilizes the genetic code 4 for translation instead of the code 1 usually found among diatoms.

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Efficient crushing of hard benthic diatoms in the gut of the Manila clam Ruditapes philippinarum – Experimental and observational evidence

Cited by 6 publications

References 46 publications

Feeding effects of the keystone deposit feeder Ilyanassa obsoleta (Neogastropoda, Gastropoda) on sedimentary diatoms

Feeding effects of the keystone deposit feeder Ilyanassa obsoleta (Neogastropoda, Gastropoda) on sedimentary diatoms

Flexible herbivory of the euryhaline mysid <i>Neomysis awatschensis</i> in the microtidal Yura River estuary, central Japan

A New Insight Into Amicula, a Genus of Tiny Marine Benthic Diatoms With the Description of Two New Tropical Species and the Largest Mitogenome Known for a Stramenopile

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