Variable thermal stress tolerance of the reef-associated symbiont-bearing foraminifera Amphistegina linked to differences in symbiont type

Stuhr, Marleen; Meyer, A. B.; Reymond, Claire E.; Narayan, Gita R; Rieder, Vera; Rahnenführer, Jörg; Kučera, Michal; Westphal, Hildegard; Muhando, Christopher A.; Hallock, Pamela

doi:10.1007/s00338-018-1707-9

Cited by 27 publications

(31 citation statements)

References 47 publications

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“…This confirms the role of the symbiont community as an important interface between the host and the local environment (e.g. [22,25]). Symbiont communities respond differently to differing conditions, and the high variability within sites reveals that a wide array of symbiont communities remains viable within most sites (Fig.…”

Section: Discussionsupporting

confidence: 77%

“…[3]), but our results reveal an unexpectedly high level of variability in the algal communities within sites, especially in A. lobifera. Each site is subject to a unique set of environmental conditions, which dictate the performance of differing algal symbiont types, and consequently the fitness of the host LBF [20,22]. Although some sites contained a limited range of algal taxa (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Interestingly, A. lobifera and A. radiata showed a higher alpha diversity and variability in algal biome, while A. lessonii showed a less diverse and more variable symbiont community gibbosa, which is a species restricted to the Atlantic Ocean. This species has shown to be associated with a single sequence type [22] or very low symbiont diversity [18]. However, the limited geographic distribution of A. gibbosa and the small spatial extent of the study conducted by Stuhr et al [22] might have contributed to the reduced number of symbionts found.…”

Section: Discussionmentioning

confidence: 99%

“…This species has shown to be associated with a single sequence type [22] or very low symbiont diversity [18]. However, the limited geographic distribution of A. gibbosa and the small spatial extent of the study conducted by Stuhr et al [22] might have contributed to the reduced number of symbionts found. For instance, the Caribbean Sea is far smaller than the Indo-Pacific Ocean and supports a reduced diversity of LBF and Amphistegina [30], which is only represented in this region by the single species A. gibbosa.…”

Section: Discussionmentioning

confidence: 99%

“…The diversity of symbionts might also play a key role in thermal stress tolerances [22], and potentially facilitates geographic range expansion in response to ocean warming [23,24]. The presence of a consortium of diverse algal species that can be functionally relevant within different environmental conditions may include thermo-tolerant genotypes or species [20,25].…”

Section: Introductionmentioning

confidence: 99%

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Diversity and flexibility of algal endosymbionts in globally-distributed large benthic foraminifera

Mdf¹,

Roberts²,

Sf³

et al. 2020

Preprint

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Background Revealing the specificity and flexibility of the algal symbiont-host association is fundamental for understanding how species can occupy a diverse range of habitats. Here we assessed the global distribution of the algal symbiont diversity for three shallow-water species of large benthic foraminifera (LBF) of the genus Amphistegina . Specifically, weinvestigated the role of habitat and host identity on the diversity of algal biome. Results Here we used next-generation sequencing to identify the algal biome in the species A. lobifera , A. lessonii , and A. radiata , collected from shallow habitats in 16 sites, spanning from the Mediterranean Sea to French Polynesia. Results showed the consistent presence of Fragilariales as the main algal taxa associated with all species across sites analysed. However, we uncovered unprecedented diversity of algal phylotypes found in low abundance.We further found high variability in algal biomes both within and between species and sites, indicating a substantial level of flexibility in symbiont associations. The effect of site was significant in all species analysed, and showed that local habitat is the main factor influencing the identity of algal symbionts. Symbiotic associations are also not constrained by the species identity nor the phylogenetic relationship among closely related hosts, suggesting symbiont identity plays a limited role in the evolutionary history of the genus Amphistegina . Conclusions We found that species of Amphistegina form flexible symbiotic relationship with algal taxa, which are primarily shaped by their local habitat. These observations strongly suggest that the capacity of Amphistegina species to utilise a diverse array of available symbionts likely underpins the ecological success of these crucial calcifying organisms across their extensive geographic range.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diversity and flexibility of algal endosymbionts in globally-distributed large benthic foraminifera

Mdf¹,

Roberts²,

Sf³

et al. 2020

Preprint

Self Cite

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Microplastics alter feeding strategies of a coral reef organism

Joppien

Westphal

Stuhr

et al. 2022

Limnol Oceanogr Letters

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Increasing marine microplastic pollution has detrimentally impacted organismal physiology and ecosystem functioning. While previous studies document negative effects of microplastics on coral reef animals, the potential responses of organisms such as large benthic foraminifera (LBF) are largely unknown. Here, we document the impact of microplastics on heterotrophic feeding behavior of LBF. Specimens of Amphistegina gibbosa were incubated in three experimental treatments: (1) Artemia sp. nauplii only; (2) pristine microplastic particles only; and (3) choice of nauplii and pristine microplastic. Feeding responses were evaluated 24 h after initiation of treatments. A separate experiment was conducted to compare the effect of conditioned vs. pristine microplastic. Our results indicate that A. gibbosa is able to selectively feed on Artemia, avoiding interactions with pristine microplastic. However, the presence of conditioned microplastic causes similar feeding interaction rates as with Artemia. This suggests that microplastics with longer residence times may have a larger impact on facultative detritivores.

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Effects of thermal history on the responses to thermal stress of a large benthic foraminifera, Calcarina gaudichaudii

et al. 2021

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Variable thermal stress tolerance of the reef-associated symbiont-bearing foraminifera Amphistegina linked to differences in symbiont type

Cited by 27 publications

References 47 publications

Diversity and flexibility of algal endosymbionts in globally-distributed large benthic foraminifera

Diversity and flexibility of algal endosymbionts in globally-distributed large benthic foraminifera

Microplastics alter feeding strategies of a coral reef organism

Effects of thermal history on the responses to thermal stress of a large benthic foraminifera, Calcarina gaudichaudii

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