A resilient brooding coral in the broadcast spawning Porites lobata species complex: a new endemic, introduced species, mutant, or new adaptive potential?

Brown, Narrissa P.; Forsman, Zac H.; Tisthammer, Kaho H.; Richmond, Robert H.

doi:10.1007/s00338-020-01922-w

Cited by 14 publications

(26 citation statements)

References 41 publications

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“…Technical replicates always clustered together and were nearly identical, indicating that mislabeling or sample switching was also highly unlikely. P.sp.1 , which has been recently described as an unusually resilient brooding coral 37 was intermediate between Clade B and Clade C. The clades B and C (Fig. 2 A,B blue and green boxes), differed from each other by only ~ 7 bp over the 18 Kb alignment (0.04 ± 0.02%; mean ± S.D.).…”

Section: Resultsmentioning

confidence: 85%

“…2, 3, S1) clustered towards the edge boundaries of the P. lobata species complex. P.sp1 is of interest as it has recently been described as an unusual and resilient brooding coral found proliferating in Honolulu Harbor 37 . RAxML trees of a range of filtered data subsets showed that the 'relaxed' filtering settings resulted in stronger clade support values, shorter tip branch length, and increased resolution, with no clear conflict with more strictly filtered data subsets, therefore the 'relaxed' filtered datasets were presented here (Fig.…”

Section: Read Mapping To References and Genomic Analysismentioning

confidence: 99%

“…We collected paired bleached (n = 19) and apparently unaffected colonies (n = 18) during the 2015 that were located side by side on the same reefs in Kāne'ohe Bay O'ahu during the 2015 thermal stress event (see Table S1 for complete sampling information). We also included a single sample of the unusual 'Habor Porites' (P.sp1) that was described previously 37 . These metagenomic libraries were compared with other Porites collected on O'ahu from a previous study in our laboratory generated using the same method 10 .…”

Section: Sample Collection and Dna Sequencing Coral Samples Were Colmentioning

confidence: 99%

“…We used a reduced representation genomic approach 36 to extract metagenomic libraries from these samples to compare to additional P. lobata and outgroup (P. evermanni) libraries from a previous study (n = 17) using the same method (ezRAD) developed in our laboratory 10 . In addition, we included a single sample from an unidentified and unusual Porites coral (P. sp1) recently discovered to be rapidly proliferating in Honolulu Harbor, seemingly unaffected by multiple stressors and bleaching events 37 . This coral was placed well within the gonochoric broadcast spawning P. lobata species complex, by mitochondrial and nuclear markers, despite observations of unusual color, colony morphology, and asexual brooding mode of reproduction 37 .…”

mentioning

confidence: 99%

“…In addition, we included a single sample from an unidentified and unusual Porites coral (P. sp1) recently discovered to be rapidly proliferating in Honolulu Harbor, seemingly unaffected by multiple stressors and bleaching events 37 . This coral was placed well within the gonochoric broadcast spawning P. lobata species complex, by mitochondrial and nuclear markers, despite observations of unusual color, colony morphology, and asexual brooding mode of reproduction 37 .…”

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confidence: 99%

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Host-symbiont coevolution, cryptic structure, and bleaching susceptibility, in a coral species complex (Scleractinia; Poritidae)

Forsman

Ritson‐Williams

Tisthammer

et al. 2020

Sci Rep

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The ‘species’ is a key concept for conservation and evolutionary biology, yet the lines between population and species-level variation are often blurred, especially for corals. The ‘Porites lobata species complex’ consists of branching and mounding corals that form reefs across the Pacific. We used reduced representation meta-genomic sequencing to examine genetic relationships within this species complex and to identify candidate loci associated with colony morphology, cryptic genetic structure, and apparent bleaching susceptibility. We compared existing Porites data with bleached and unbleached colonies of the branching coral P. compressa collected in Kāneʻohe Bay Hawaiʻi during the 2015 coral bleaching event. Loci that mapped to coral, symbiont, and microbial references revealed genetic structure consistent with recent host-symbiont co-evolution. Cryptic genetic clades were resolved that previous work has associated with distance from shore, but no genetic structure was associated with bleaching. We identified many candidate loci associated with morphospecies, including candidate host and symbiont loci with fixed differences between branching and mounding corals. We also found many loci associated with cryptic genetic structure, yet relatively few loci associated with bleaching. Recent host-symbiont co-evolution and rapid diversification suggests that variation and therefore the capacity of these corals to adapt may be underappreciated.

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Section: Resultsmentioning

confidence: 85%

Section: Read Mapping To References and Genomic Analysismentioning

confidence: 99%

Section: Sample Collection and Dna Sequencing Coral Samples Were Colmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Host-symbiont coevolution, cryptic structure, and bleaching susceptibility, in a coral species complex (Scleractinia; Poritidae)

Forsman

Ritson‐Williams

Tisthammer

et al. 2020

Sci Rep

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Extended phenotypes on coral reefs: cryptic phenotypes modulate coral‐vermetid interactions

Brown

Hamman

Shima

et al. 2021

Ecology

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Phenotypic variation can lead to variation in the strength and outcome of species interactions. Variation in phenotypic traits can arise due to plastic responses to environmental stimuli, underlying genetic variation, or both, and may reflect differences in the focal organism or aspects of the extended phenotype (e.g., associated microbes). We used a reciprocal transplant experiment of Porites corals to evaluate the role of plasticity vs. heritable diversity on phenotypic traits and performance of corals that varied in their prior exposure to vermetid gastropods, an organism known to reduce coral growth and survival. We measured a suite of phenotypic traits associated with coral performance, many of which showed a plastic response to vermetid exposure. Vermetids decreased calcification of corals, increased microbial diversity, and shifted microbial composition. Most traits also showed a signature of previous exposure environment that persisted even when exposure was reversed: i.e., under the same conditions, corals naïve to vermetids had slower calcification rates, thicker tissues, higher Symbiodiniaceae densities, and different microbiomes than corals previously exposed to vermetids. We suggest the phenotypic differences are heritable, as reefs with and without vermetids were comprised of two different mitotypes, that revealed high, consistent genetic variation. Vermetids were only found on the fast‐growing coral mitotype that was characterized by thin tissue, and that likely had a history of disturbance. As extended phenotypes can have community impacts, we suggest vermetid, in addition to microbes, are part of the extended community phenotype of these corals. Coral genotypes can establish different reef trajectories, with thin‐tissue types more prone to disturbance and subsequent colonization by other species, like vermetids, which can further facilitate the degradation of coral reefs. The effects of the extended phenotype of species likely influence heterogeneity across landscapes as well as temporal differences in community composition.

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Adaptation of a risk‐based framework for evaluating indirect effects of dredging on sensitive habitats near federal navigation channels: An application of the framework to coral reefs at Honolulu Harbor, Hawai'i

Suedel,

Wilkens,

McQueen

et al. 2023

Integr Envir Assess & Manag

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In major harbors and ports in the United States and its territories, the U.S. Army Corps of Engineers maintains Federal navigation channels in proximity to coral reefs (e.g., Honolulu Harbor, HI; Miami Harbor, FL; Apra Harbor, Guam) and other sensitive habitats. To effectively predict potential adverse impacts from dredging activities near these sensitive habitats, a holistic approach to improve understanding of the pressures on these habitats is needed to foster a more complete prediction of risk drivers. To achieve this, risk‐based frameworks that account for the full range of natural and anthropogenic impacts need to be adapted and applied specifically for assessing and managing indirect dredging impacts on sensitive environments. In this paper we address this need by incorporating a Drivers‐Pressures‐Stressors‐Condition‐Response (DPSCR4) conceptual framework to broaden a comprehensive conceptual model of the coupled human‐ecological system. To help understand these complex interactions, DPSCR4 was applied to evaluate dredging and other unrelated environmental pressures (e.g., terrestrial runoff) in a proof‐of‐concept dredging project in Honolulu Harbor, HI, USA, with a focus on the indirect effects of dredge plumes. Particle tracking models and risk‐based tools were used to evaluate sediment resuspended during a hypothetical mechanical dredging activity near sensitive coral habitats. Stoplight indicators were developed to predict indirect sediment plume impacts on coral and then compared to exposure modeling results. The strengths and limitations of the approach are presented and the incorporation of the risk‐framework into environmental management decisions is discussed.

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A resilient brooding coral in the broadcast spawning Porites lobata species complex: a new endemic, introduced species, mutant, or new adaptive potential?

Cited by 14 publications

References 41 publications

Host-symbiont coevolution, cryptic structure, and bleaching susceptibility, in a coral species complex (Scleractinia; Poritidae)

Host-symbiont coevolution, cryptic structure, and bleaching susceptibility, in a coral species complex (Scleractinia; Poritidae)

Extended phenotypes on coral reefs: cryptic phenotypes modulate coral‐vermetid interactions

Adaptation of a risk‐based framework for evaluating indirect effects of dredging on sensitive habitats near federal navigation channels: An application of the framework to coral reefs at Honolulu Harbor, Hawai'i

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