Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range

Austrominius modestus, formerly Elminius modestus, is a relatively small species of four-plated acorn barnacle, which is native to the subtropical and temperate zones of Australasia. It was introduced into Europe in the 1940s, where its current range includes England, Scotland, Wales, Ireland and co...

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description Austrominius modestus, formerly Elminius modestus, is a relatively small species of four-plated acorn barnacle, which is native to the subtropical and temperate zones of Australasia. It was introduced into Europe in the 1940s, where its current range includes England, Scotland, Wales, Ireland and continental Europe from Denmark to southern Portugal, as well as two reported locations in the Mediterranean Sea. This species occurs intertidally and subtidally on a very wide range of substrata in both its native and introduced range and is found on sheltered to intermediate exposed shores, but is absent from wave-exposed shores, probably due to the relative fragility of its shell. A. modestus is known to be both euryhaline and eurythermal, but its physiology (and that of other cirripedes) has been relatively little studied in comparison with other invertebrate species. Cold temperatures and competition from arctic-boreal barnacle species currently control its northern limit. At the southern limit, desiccation stress, or some other stress(es), may be limiting the abundance of Austrominius modestus by affecting cyprids and/or metamorphs at the settlement and recruitment stages. Abundance may also be limited by factors occurring at the reproductive stage. Since Austrominius modestus is an obligatory cross-fertiliser, the need for a critical breeding density is one of the factors that appears to have slowed the speed of its spread in Europe. Although this species can commence reproducing at a very young age and under optimal conditions produces multiple broods per year, its fecundity has not yet been studied. An examination of the age of first brooding, the timing and size and number of broods per year at sites at the northern (Scotland) and southern (Portugal) limits of the current invasive range of Austrominius modestus may provide a better understanding of the factors controlling its geographic distribution, abundance and speed of spread in its non-native range. For instance, warming waters could result in increased reproduction and recruitment of Austrominius modestus, leading to a reduced density of the native Semibalanus balanoides Linnaeus which may drive Semibalanus balanoides to extinction in certain parts of its range. Further research is necessary to determine the functional role of Austrominius modestus in relation to native species in order to understand the implications that changes in abundance and distribution of A. modestus may have for ecosystems.
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spelling doab-20.500.12854ir-641162025-03-12T19:57:38Z Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range O'Riordan, Ruth M. Culloty, Sarah C. Mcallen, Rob gallagher, mary catherine Austrominius modestus, Elminius modestus, four-plated acorn barnacle, subtropical Australasia, Australasian marine life, invasive species, ecosystems, invertebrate species thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSP Hydrobiology::PSPM Marine biology thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology::RNCB Biodiversity thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBK Hydrology and the hydrosphere::RBKC Oceanography (seas and oceans) thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology thema EDItEUR::P Mathematics and Science::PS Biology, life sciences thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSV Zoology and animal sciences::PSVA Zoology: invertebrates Austrominius modestus, formerly Elminius modestus, is a relatively small species of four-plated acorn barnacle, which is native to the subtropical and temperate zones of Australasia. It was introduced into Europe in the 1940s, where its current range includes England, Scotland, Wales, Ireland and continental Europe from Denmark to southern Portugal, as well as two reported locations in the Mediterranean Sea. This species occurs intertidally and subtidally on a very wide range of substrata in both its native and introduced range and is found on sheltered to intermediate exposed shores, but is absent from wave-exposed shores, probably due to the relative fragility of its shell. A. modestus is known to be both euryhaline and eurythermal, but its physiology (and that of other cirripedes) has been relatively little studied in comparison with other invertebrate species. Cold temperatures and competition from arctic-boreal barnacle species currently control its northern limit. At the southern limit, desiccation stress, or some other stress(es), may be limiting the abundance of Austrominius modestus by affecting cyprids and/or metamorphs at the settlement and recruitment stages. Abundance may also be limited by factors occurring at the reproductive stage. Since Austrominius modestus is an obligatory cross-fertiliser, the need for a critical breeding density is one of the factors that appears to have slowed the speed of its spread in Europe. Although this species can commence reproducing at a very young age and under optimal conditions produces multiple broods per year, its fecundity has not yet been studied. An examination of the age of first brooding, the timing and size and number of broods per year at sites at the northern (Scotland) and southern (Portugal) limits of the current invasive range of Austrominius modestus may provide a better understanding of the factors controlling its geographic distribution, abundance and speed of spread in its non-native range. For instance, warming waters could result in increased reproduction and recruitment of Austrominius modestus, leading to a reduced density of the native Semibalanus balanoides Linnaeus which may drive Semibalanus balanoides to extinction in certain parts of its range. Further research is necessary to determine the functional role of Austrominius modestus in relation to native species in order to understand the implications that changes in abundance and distribution of A. modestus may have for ecosystems. 2021-03-19T03:03:38Z 2021-03-19T03:03:38Z 2021-03-18T16:09:31Z 2020 chapter https://library.oapen.org/handle/20.500.12657/47403 9780367367947 https://directory.doabooks.org/handle/20.500.12854/64116 eng open access image/jpeg image/jpeg Attribution-NonCommercial-NoDerivatives 4.0 International Attribution-NonCommercial-NoDerivatives 4.0 International https://library.oapen.org/bitstream/20.500.12657/47403/1/9780429351495_oachapter1.pdf https://library.oapen.org/bitstream/20.500.12657/47403/1/9780429351495_oachapter1.pdf Taylor & Francis CRC Press fa69b019-f4ee-4979-8d42-c6b6c476b5f0 Oceanography and Marine Biology University College Cork 6514ed25-71c1-4e46-b165-a8ea5f2a0b19 9780367367947 CRC Press 79 open access
spellingShingle Austrominius modestus, Elminius modestus, four-plated acorn barnacle, subtropical Australasia, Australasian marine life, invasive species, ecosystems, invertebrate species
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSP Hydrobiology::PSPM Marine biology
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology::RNCB Biodiversity
thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBK Hydrology and the hydrosphere::RBKC Oceanography (seas and oceans)
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSV Zoology and animal sciences::PSVA Zoology: invertebrates
Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range
title Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range
title_full Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range
title_fullStr Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range
title_full_unstemmed Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range
title_short Chapter 1 The Biology of Austrominius Modestus (Darwin) in its Native and Invasive Range
title_sort chapter 1 the biology of austrominius modestus darwin in its native and invasive range
topic Austrominius modestus, Elminius modestus, four-plated acorn barnacle, subtropical Australasia, Australasian marine life, invasive species, ecosystems, invertebrate species
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSP Hydrobiology::PSPM Marine biology
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology::RNCB Biodiversity
thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBK Hydrology and the hydrosphere::RBKC Oceanography (seas and oceans)
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSV Zoology and animal sciences::PSVA Zoology: invertebrates
topic_facet Austrominius modestus, Elminius modestus, four-plated acorn barnacle, subtropical Australasia, Australasian marine life, invasive species, ecosystems, invertebrate species
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSP Hydrobiology::PSPM Marine biology
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology::RNCB Biodiversity
thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBK Hydrology and the hydrosphere::RBKC Oceanography (seas and oceans)
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNC Applied ecology
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSV Zoology and animal sciences::PSVA Zoology: invertebrates
url https://library.oapen.org/handle/20.500.12657/47403