Giant ephemeral anemones? Rapid growth and high mortality of corkscrew sea anemones Bartholomea annulata (Le Sueur, 1817) under variable conditions

O’Reilly, Erin; Titus, Benjamin M.; Nelsen, M.W.; Ratchford, Stephen G.; Chadwick, Nanette E.

doi:10.1016/j.jembe.2018.08.013

Cited by 8 publications

(7 citation statements)

References 57 publications

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“…Here, we conducted range‐wide population‐level sampling on coral reefs throughout the Tropical Western Atlantic (TWA) for the corkscrew sea anemone Bartholomea annulata , a common and ecologically important sea anemone (Briones‐Fourzán, Pérez‐Ortiz, Negrete‐Soto, Barradas‐Ortiz, & Lozano‐Álvarez, ; O'Reilly, Titus, Nelsen, Ratchford, & Chadwick, ; Titus & Daly, ; Titus, Daly, & Exton, ; Titus et al, ). Using a double digest restriction‐site associated DNA sequencing (ddRADseq) approach, we detected support for a previously unrecognized cryptic species that is codistributed throughout the region.…”

Section: Introductionmentioning

confidence: 99%

Genomic signatures of sympatric speciation with historical and contemporary gene flow in a tropical anthozoan (Hexacorallia: Actiniaria)

2019

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Sympatric diversification is recognized to have played an important role in the evolution of biodiversity. However, an in situ sympatric origin for codistributed taxa is difficult to demonstrate because different evolutionary processes can lead to similar biogeographic outcomes, especially in ecosystems that can readily facilitate secondary contact due to a lack of hard barriers to dispersal. Here we use a genomic (ddRADseq), model‐based approach to delimit a species complex of tropical sea anemones that are codistributed on coral reefs throughout the Tropical Western Atlantic. We use coalescent simulations in fastsimcoal2 and ordinary differential equations in Moments to test competing diversification scenarios that span the allopatric‐sympatric continuum. Our results suggest that the corkscrew sea anemone Bartholomea annulata is a cryptic species complex whose members are codistributed throughout their range. Simulation and model selection analyses from both approaches suggest these lineages experienced historical and contemporary gene flow, supporting a sympatric origin, but an alternative secondary contact model receives appreciable model support in fastsimcoal2. Leveraging the genome of the closely related Exaiptasia diaphana, we identify five loci under divergent selection between cryptic B. annulata lineages that fall within mRNA transcripts or CDS regions. Our study provides a rare empirical, genomic example of sympatric speciation in a tropical anthozoan and the first range‐wide molecular study of a tropical sea anemone, underscoring that anemone diversity is under‐described in the tropics, and highlighting the need for additional systematic studies into these ecologically and economically important species.

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Section: Introductionmentioning

confidence: 99%

Genomic signatures of sympatric speciation with historical and contemporary gene flow in a tropical anthozoan (Hexacorallia: Actiniaria)

2019

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“…This may indicate a potential range expansion. In warm waters, Bartholomea annulata (Le Sueur, 1817), a species native to the Caribbean that undergoes both sexual and asexual reproduction to form aggregations (Jennison 1981), is commonly harvested and thus moved via the aquarium trade (O’Reilly et al 2018 , Legore et al 2005 ). The combination of life history strategies encourage the potential for introduction and invasion if released into a non-native body of water from an aquarium.…”

Section: Discussion: Assessing the Risk Of Introduction And Successfumentioning

confidence: 99%

Mediators of invasions in the sea: life history strategies and dispersal vectors facilitating global sea anemone introductions

et al. 2020

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Widespread non-native species tend to demonstrate an apparent lack of selectivity in habitat requirements, feeding regimes, and reproductive needs, while displaying a tendency to thrive in human-modified habitats. The high phenotypic plasticity typical of sessile, substrate-attached marine species may enhance their chances of survival and spread in a new region. Anthropogenic activities have changed marine habitats over a wide range of phenomena, including water temperature, community species composition, and the types of available substrates, creating new physical and biotic regimes that may contribute to the potential for successful species introduction. Here we examine ten species of sea anemones that have been introduced outside of their native range, and elucidate specific characteristics that are common among globally introduced sea anemones. Various life history strategies enable these species to survive and flourish through transport, introduction, establishment and spread, leading to the successful colonization of a new geographic area. Considering life history strategies and weighing of vector potential, we suggest conditions that facilitate introduction of these species, and identify species of sea anemones that may be introduced in the future in the face of changing climate and increased anthropogenic activities.

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“…At each station, the number of A. pedersoni individuals were recorded as was the size of the inhabited anemone, measured as tentacle crown surface area (TCSA cm 2 ) and calculated from the long and short diameters of the anemone tentacle crown (e.g. Huebner & Chadwick, 2012 b ; O'Reilly et al ., 2018).…”

Section: Methodsmentioning

confidence: 99%

“…Almost always inhabiting sea anemones (Limbaugh et al ., 1961), its primary host is the corkscrew sea anemone, Bartholomea annulata (LeSueur) (Mahnken, 1972; Briones-Fourzán et al ., 2012; Mascaró et al ., 2012; Huebner & Chadwick, 2012 a , 2012 b ; Titus et al ., 2017 a ) with which they can be found living singly or in groups of up to 12 individuals (Titus et al ., 2015 b ). The most abundant anemone in the Caribbean, B. annulata is a habitat generalist found solitarily or in small aggregations on coral reefs, seagrass beds, and hard-bottom habitats (Briones-Fourzán et al ., 2012; Titus et al ., 2017 b ; O'Reilly et al ., 2018). This anemone species also serves as a visual cue for reef fish to locate A. pedersoni cleaning stations (Huebner & Chadwick, 2012 b ).…”

Section: Introductionmentioning

confidence: 99%

Comparative cleaning behaviour of Pederson's cleaner shrimp (Ancylomenes pedersoni) between geographically close yet ecologically dissimilar coral reef habitats

et al. 2020

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Cleaning mutualisms are important interactions on coral reefs. Intraspecific variation in cleaning rate and behaviour occurs geographically and is often attributed to local processes. However, our understanding of fine-scale variation is limited, but would allow us to control for geography and region-specific behavioural patterns. Here, we compare the cleaning activity of Pederson's cleaner shrimp (Ancylomenes pedersoni) on two neighbouring, yet ecologically dissimilar, reef systems in Honduras: Banco Capiro, an offshore bank close to significant land runoff with high coral cover but a depleted fish population, and an oligotrophic fringing reef around the island of Utila, with lower coral cover but high fish abundance and diversity. The proportion of realized to potential fish clientele was <60% at both sites, and the composition of clientele was neither reflective of the demographics of the resident assemblages at each site nor similar between sites. Parrotfishes represented 13–15% of total fish abundance at both sites yet accounted for >50% (Banco Capiro) and 10% (Utila) of all cleans. Conversely, the schoolmaster snapper (Lutjanus apodus) represented ~1% of total fish abundance at both sites yet accounted for 40% (Utila) and 1% (Banco Capiro) of all cleans. After standardizing our cleaning rate data by clientele abundance, we find that clientele at Banco Capiro engage in over four times as many cleaning encounters per hour with A. pedersoni than at Utila. Our study highlights the variable nature of coral reef cleaning interactions and the need to better understand the ecological and environmental drivers of this biogeographic variation.

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Giant ephemeral anemones? Rapid growth and high mortality of corkscrew sea anemones Bartholomea annulata (Le Sueur, 1817) under variable conditions

Cited by 8 publications

References 57 publications

Genomic signatures of sympatric speciation with historical and contemporary gene flow in a tropical anthozoan (Hexacorallia: Actiniaria)

Genomic signatures of sympatric speciation with historical and contemporary gene flow in a tropical anthozoan (Hexacorallia: Actiniaria)

Mediators of invasions in the sea: life history strategies and dispersal vectors facilitating global sea anemone introductions

Comparative cleaning behaviour of Pederson's cleaner shrimp (Ancylomenes pedersoni) between geographically close yet ecologically dissimilar coral reef habitats

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