The coastal marine mollusc fauna of King Island, Tasmania

Grove, S; Little, R.

doi:10.26749/rstpp.148.17

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…Shell deposits were identified for poor habitat fidelity from upper estuarine and/or intertidal to supra-tidal zones (Grove, 2017). The temporal shell fidelity with respect to the Anthropocene was measured from the 14 C of the shell carbonate from the largest and dominant species (ANSTO).…”

Section: Methodsmentioning

confidence: 99%

Sediment geochronology for bar-built estuaries subject to flood deposition and erosion: A robust multiproxy approach across an estuarine zone

Gallagher

Ross

2017

The Holocene

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This paper presents a contiguous late Anthropocene 210 Pb sediment geochronology and a late Anthropocene flood/fire event geochronology for an estuary subject to flood deposition and erosion. The procedure used multiple proxies to identify and evaluate flood facies overlying regions of erosion. Reconstructions of the original baseline sediments were undertaken for the major 210 Pb geochronological methods. Only the lower estuary core site, which was deficient in inventory of excess 210 Pb of baseline sediments, over the expected atmospheric supply for, was chosen to calculate the total amount of erosion. Erosion, as both cumulative mass and thickness, was then proportioned across flood events, relative to the size of the Rp index flood signal. The Rp index is the product of a simple stepwise thermogravimetric procedure. The flood geochronology was constructed by correlating the relative magnitudes of pivotal floods from an existing 100-year rainfall/river flow model and correlations in peak sediment char content outside of the flood facies with contemporary fire records. Overall, it was determined that 210 Pb sediment isotope tomography gave the closest convergence with flood and fire events over those of the constant rate of supply and constant initial concentration methods. The agreement signified that around 40% of the original baseline accretion (25 cm) had been eroded by floods over the last 83 years and that there was possibly considerably more erosion at the upper site, which led to the loss of two flood facies.

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Section: Methodsmentioning

confidence: 99%

Sediment geochronology for bar-built estuaries subject to flood deposition and erosion: A robust multiproxy approach across an estuarine zone

Gallagher

Ross

2017

The Holocene

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“…Even though the invertebrate values on Tasmania's offshore islands are becoming better known, this faunal group remains significantly under-surveyed. The coastal mollusc fauna on King Island contains at least 408 species with 78 being recorded for the first time by Grove and de Little (2014). Hamish Saunders Memorial Island surveys and Oil Spill Response surveys have targeted the PLATE 2 -Dolerite structural columns on Tasman Island.…”

Section: Fauna Valuesmentioning

confidence: 99%

Overview of Tasmania’s offshore islands and their role in nature conservation

Bryant¹,

Harris²

2020

PPRST

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Since the 1970s, knowledge of Tasmania's offshore islands has expanded greatly due to an increase in systematic and regional surveys, the continuation of several long-term monitoring programs and the improved delivery of pest management and translocation programs. However, many islands remain data-poor especially for invertebrate fauna, and non-vascular flora, and information sources are dispersed across numerous platforms. While more than 90% of Tasmania's offshore islands are statutory reserves, many are impacted by a range of disturbances, particularly invasive species with no decision-making framework in place to prioritise their management. This paper synthesises the significant contribution offshore islands make to Tasmania's land-based natural assets and identifies gaps and deficiencies hampering their protection. A continuing focus on detailed gap-filling surveys aided by partnership restoration programs and collaborative national forums must be strengthened if we are to capitalise on the conservation benefits islands provide in the face of rapidly changing environmental conditions and pressure for future use.

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“…The genus Berthelinia s.l. comprises species in several potentially distinct genera (Edenttellina, Midorigai, Tamanovalva), which are currently considered junior synonyms but often still used in identification (Grove and de Little 2014;Wägele and Martin 2014). There is, thus, some modest diversity in the family.…”

Section: Drivers For Species Diversitymentioning

confidence: 99%

Natural history clues to the evolution of bivalved gastropods (Mollusca: Gastropoda: Sacoglossa: Juliidae)

Wong

Sigwart

2019

Mar Biodiv

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Bivalved gastropods (family Juliidae) are a pan-tropical group of small, green, extraordinary gastropods with a symmetrical clam-like shell. Only a single species of Juliidae has been reported in Malaysia, Berthelinia singaporensis Jensen, 2015, feeding on multiple species of siphonous green algae in the genus Caulerpa. In spite of a baseline expectation for megadiversity in this region, including 13 recorded species in the genus Caulerpa from two small field sites studied here, B. singaporensis appears to be a relative generalist without preferences among available Caulerpa spp. that occur in suitable (micro)habitats. The life cycle of Juliidae includes univalve, coiled larvae that transform to bivalved adults. In the presence of Caulerpa, swimming veligers rapidly settle and begin feeding; in a later, terminal metamorphosis, the larval operculum is shed, and the teleoconch shell field splits to form a second, right valve of the adult bivalved form. By three days after hatching, settled larvae achieve a fully functional bivalved shell with a working hinge. Both veligers and adults produce an unusual elastic mucous tether to maintain attachment to the substratum or food plant. These animals are dependent on Caulerpa for their entire life cycle; so, adults occupy environments where dislodgement may be a substantial risk. In the adult, bivalved, form, the gastropod can withdraw completely into its shell and close the valves while maintaining the byssus-like tether. This arrangement, enabling the gastropod to be simultaneously anchored to the food plant and protected within the shell, suggests that being able to use a byssus is the most plausible adaptive explanation for the evolution of the bivalved form within gastropods.

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The coastal marine mollusc fauna of King Island, Tasmania

Cited by 3 publications

References 13 publications

Sediment geochronology for bar-built estuaries subject to flood deposition and erosion: A robust multiproxy approach across an estuarine zone

Sediment geochronology for bar-built estuaries subject to flood deposition and erosion: A robust multiproxy approach across an estuarine zone

Overview of Tasmania’s offshore islands and their role in nature conservation

Natural history clues to the evolution of bivalved gastropods (Mollusca: Gastropoda: Sacoglossa: Juliidae)

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