Environmental and geographical factors structure cauliflower coral's algal symbioses across the Indo‐Pacific

Glynn, Victoria M.; Vollmer, Steven V.; Kline, David I.; Barrett, Rowan D. H.

doi:10.1111/jbi.14560

Cited by 3 publications

(3 citation statements)

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“…Our results highlight the importance of sampling across the relevant spatial scales and environments (Connolly et al., 2005 ; Karlson & Cornell, 1998 ). Most previous studies have focused on factors structuring cryptic diversity and symbiosis by sampling across large spatial scales, such as across the entire ocean basins (Glynn et al., 2023 ; Oury et al., 2023 ; Voolstra et al., 2023 ) or across several degrees of latitude (Buitrago‐López et al., 2023 ; Marzonie et al., 2024 ; Matias et al., 2023 ; Meziere et al., 2024 ). The comparison of samples across islands and reefs over such large scales could be confounded if a species is not sampled because it was rare in the particular habitat that was sampled, or if different habitats are sampled among reefs.…”

Section: Discussionmentioning

confidence: 99%

“…Niche breadth and overlap of cryptic species could also depend on the identity of the photosynthetic microalgae from the family Symbiodiniaceae with which they form an obligate symbiosis (Buitrago‐López et al., 2023 ; Glynn et al., 2023 ; Gómez‐Corrales & Prada, 2020 ; Hoadley et al., 2021 ; Kemp et al., 2023 ; Marzonie et al., 2024 ; Palacio‐Castro et al., 2023 ; Parkinson & Baums, 2014 ; Starko et al., 2023 ; Thornhill et al., 2014 ; Turnham et al., 2021 ). Much of the coral's nutrition relies on the photosynthetic algae to convert inorganic carbon and nitrogen to nutrients through photosynthesis and absorption of nitrogen wastes.…”

Section: Introductionmentioning

confidence: 99%

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Niche breadth and divergence in sympatric cryptic coral species (Pocillopora spp.) across habitats within reefs and among algal symbionts

Burgess,

Turner,

Johnston

2024

Evolutionary Applications

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While the presence of morphologically cryptic species is increasingly recognized, we still lack a useful understanding of what causes and maintains co‐occurring cryptic species and its consequences for the ecology, evolution, and conservation of communities. We sampled 724 Pocillopora corals from five habitat zones (the fringing reef, back reef, and fore reef at 5, 10, and 20 m) at four sites around the island of Moorea, French Polynesia. Using validated genetic markers, we identified six sympatric species of Pocillopora, most of which cannot be reliably identified based on morphology: P. meandrina (42.9%), P. tuahiniensis (25.1%), P. verrucosa (12.2%), P. acuta (10.4%), P. grandis (7.73%), and P. cf. effusa (2.76%). For 423 colonies (58% of the genetically identified hosts), we also used psbAncr or ITS2 markers to identify symbiont species (Symbiodiniaceae). The relative abundance of Pocillopora species differed across habitats within the reef. Sister taxa P. verrucosa and P. tuahiniensis had similar niche breadths and hosted the same specialist symbiont species (mostly Cladocopium pacificum) but the former was more common in the back reef and the latter more common deeper on the fore reef. In contrast, sister taxa P. meandrina and P. grandis had the highest niche breadths and overlaps and tended to host the same specialist symbiont species (mostly C. latusorum). Pocillopora acuta had the narrowest niche breadth and hosted the generalist, and more thermally tolerant, Durusdinium gynnii. Overall, there was a positive correlation between reef habitat niche breadth and symbiont niche breadth—Pocillopora species with a broader habitat niche also had a broader symbiont niche. Our results show how fine‐scale variation within reefs plays an important role in the generation and coexistence of cryptic species. The results also have important implications for how niche differences affect community resilience, and for the success of coral restoration practices, in ways not previously appreciated.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Niche breadth and divergence in sympatric cryptic coral species (Pocillopora spp.) across habitats within reefs and among algal symbionts

Burgess,

Turner,

Johnston

2024

Evolutionary Applications

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“…These results should nevertheless be considered cautiously since (1) host-symbiont associations vary over time and depth (Cunning et al, 2013) and appear driven by biogeography and environmental parameters (Glynn et al, 2023), and (2) quantitative interpretation of metabarcoding results can be misleading (Lamb et al, 2019). First, Pinzón and LaJeunesse (2011) found that Pocillopora type 1 (ORF27; probably GSH09b or GSH09c TSP ) was the only type associated to the thermotolerant Durusdinium glynnii (D1; Wham et al, 2017) in the tropical eastern Pacific.…”

Section: On the (Ir)relevance Of Symbiosis Ecology To Define Speciesmentioning

confidence: 99%

From genomics to integrative species delimitation? The case study of the Indo-Pacific Pocillopora corals

Oury

Noël

Mona

et al. 2023

Molecular Phylogenetics and Evolution

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Using fossil records to predict short‐term changes in niche and spatial dynamics in a broadly distributed coral reef: Niche conservatism and adaptation

de Oliveira,

Dobrovolski,

Barros

et al. 2024

Journal of Biogeography

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AimGiven the rapid pace of climate change and its significant impact on species distribution and survival, understanding the dynamics of ecological niches over time becomes imperative. By employing ecological niche models and species distribution models, alongside analyses of historical occurrence records and palaeoclimatic data, we aimed to assess the extent of changes in the niche of Porites astreoides from the Holocene to the present. Specifically, we quantified the amount of: (1) niche stability, (2) niche expansion, (3) niche decline and (4) niche overlap in both the environmental and geographical space.LocationAtlantic Ocean.TaxonCnidarian, Scleractinia.Materials and MethodsThrough fossil and current records and environmental variables from the same periods, we use two ecological niche modelling approaches (overlap and maximum entropy) to analyse niche dynamics in environmental and geographical space, specifically the degree of expansion, stability and loss of niches over the last ~8000 years. We used a principal component analysis to build the models within two different calibration areas (minimum convex polygon and buffer).ResultsOur results were similar, except for the loss of habitat, across the calibration areas used to build the models. The PCA used to build the models accounts for more than 65% of the variation in the data. Most of the environmental niche remained stable with an increase of almost a third and a negligible loss. Models in geographical space showed that most of the suitable area remained stable, but the species expanded its range from the Caribbean to the coast of Brazil. The analysis also showed a high value of niche overlap in environmental and geographical spaces.Main ConclusionsThe species studied is one of the corals with the greatest capacity to adapt to new environments and locations, but it also has a high tendency to preserve niche traits. These characteristics helped the species to expand its environmental and geographical niche in a period of relative climatic stability. On the other hand, these same characteristics of niche conservatism can lead the species to population decline and habitat loss, if the speed of adaptation is lower than the rapid climate changes predicted for the middle and end of the 21st century.

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Environmental and geographical factors structure cauliflower coral's algal symbioses across the Indo‐Pacific

Cited by 3 publications

References 183 publications

Niche breadth and divergence in sympatric cryptic coral species (Pocillopora spp.) across habitats within reefs and among algal symbionts

Niche breadth and divergence in sympatric cryptic coral species (Pocillopora spp.) across habitats within reefs and among algal symbionts

From genomics to integrative species delimitation? The case study of the Indo-Pacific Pocillopora corals

Using fossil records to predict short‐term changes in niche and spatial dynamics in a broadly distributed coral reef: Niche conservatism and adaptation

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