Bacterial community dynamics are linked to patterns of coral heat tolerance

Nature Communications, Год журнала: 2017, Номер 8(1)

Опубликована: Фев. 10, 2017

Abstract Ocean warming threatens corals and the coral reef ecosystem. Nevertheless, can be adapted to their thermal environment inherit heat tolerance across generations. In addition, diverse microbes that associate with have capacity for more rapid change, potentially aiding adaptation of long-lived corals. Here, we show microbiome is different thermally variable habitats changes over time when are reciprocally transplanted. Exposing these bleaching conditions heat-sensitive corals, but not heat-tolerant growing in natural high extremes. Importantly, particular bacterial taxa predict host response a short-term stress experiment. Such associations could result from parallel responses microbial community living at temperatures. A competing hypothesis causally linked.

Язык: Английский

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Rapid adaptive responses to climate change in corals

Nature Climate Change, Год журнала: 2017, Номер 7(9), С. 627 - 636

Опубликована: Сен. 1, 2017

Язык: Английский

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SymPortal: A novel analytical framework and platform for coral algal symbiont next‐generation sequencing ITS2 profiling

Molecular Ecology Resources, Год журнала: 2019, Номер 19(4), С. 1063 - 1080

Опубликована: Фев. 11, 2019

Abstract We present SymPortal (SymPortal.org), a novel analytical framework and platform for genetically resolving the algal symbionts of reef corals using next‐generation sequencing (NGS) data ITS2 rDNA. Although marker is widely used to characterize taxa within family Symbiodiniaceae (formerly genus Symbiodinium) , multicopy nature complicates its use. Commonly, intragenomic diversity resultant from this collapsed by approaches, thereby focusing on only most abundant sequences. In contrast, employs logic identify within‐sample informative sequences, which we have termed ‘defining variants' (DIVs), ‐type profiles representative putative taxa. By making use diversity, able resolve genetic delineations at level that was previously possible additional markers. demonstrate comparing approach commonly alternative NGS data, 97% similarity clustering operational taxonomic units (OTUs). The accepts raw as input provide an easy‐to‐use, standardization‐enforced, community‐driven integrates with database gain power increased consider SymPortal, in conjunction ongoing large‐scale sampling efforts, should play instrumental role future efforts more comparable maximizing their efficacy working towards classification global diversity.

Язык: Английский

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Environmental sustainability: challenges and viable solutions

Environmental Sustainability, Год журнала: 2018, Номер 1(4), С. 309 - 340

Опубликована: Дек. 1, 2018

Язык: Английский

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Metaorganisms in extreme environments: do microbes play a role in organismal adaptation?

Zoology, Год журнала: 2018, Номер 127, С. 1 - 19

Опубликована: Фев. 15, 2018

From protists to humans, all animals and plants are inhabited by microbial organisms. There is an increasing appreciation that these resident microbes influence the fitness of their plant animal hosts, ultimately forming a metaorganism consisting uni- or multicellular host community associated microorganisms. Research on host–microbe interactions has become emerging cross-disciplinary field. In both vertebrates invertebrates complex microbiome confers immunological, metabolic behavioural benefits; conversely, its disturbance can contribute development disease states. However, molecular cellular mechanisms controlling within poorly understood many key between organisms remain unknown. this perspective article, we outline some issues in interspecies particular address question how metaorganisms react adapt inputs from extreme environments such as deserts, intertidal zone, oligothrophic seas, hydrothermal vents.

Язык: Английский

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The Future of Coral Reefs Subject to Rapid Climate Change: Lessons from Natural Extreme Environments

Frontiers in Marine Science, Год журнала: 2018, Номер 5

Опубликована: Фев. 2, 2018

Global climate change and localised anthropogenic stressors are driving rapid declines in coral reef health. In vitro experiments have been fundamental providing insight into how organisms will potentially respond to future climates. However, such inevitably limited their ability reproduce the complex interactions that govern systems. Studies examining communities already persist under naturally-occurring extreme marginal physicochemical conditions therefore become increasingly popular advance ecosystem scale predictions of form function, although no single site provides a perfect analogue reefs. Here we review current state knowledge exists on distribution corals environments, geographic sites at latitudinal extremes growth, as well variety shallow systems reef-neighbouring environments (including upwelling CO2 vent sites). We also conduct synthesis abiotic data collected these systems, provide first collective assessment range which currently persist. use increase our understanding biological ecological mechanisms facilitate survival success sub-optimal conditions. This comprehensive can begin to: (i) highlight extent scenarios persist, (ii) explore whether there commonalities taxa able extremes, (iii) evidence for key required support and/or persistence environmental conditions, iv) evaluate potential act refugia changing Such approach is critical better understand environment. finally outline priority areas research discuss additional management options they may through refuge or by genetic stocks stress tolerant proactive strategies.

Язык: Английский

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Thermal refugia against coral bleaching throughout the northern Red Sea

Global Change Biology, Год журнала: 2017, Номер 24(2)

Опубликована: Окт. 17, 2017

Abstract Tropical reefs have been impacted by thermal anomalies caused global warming that induced coral bleaching and mortality events globally. However, there only very few recordings of within the Red Sea despite covering a latitudinal range 15° consequently it has considered region is less sensitive to anomalies. We therefore examined historical patterns sea surface temperature ( SST ) associated (1982–2012) compared trends with unique compilation corresponding records from throughout region. These data indicated northern not experienced mass intensive Degree Heating Weeks DHW >15°C‐weeks. Severe was restricted central southern where s more frequent, but far intense (DHWs <4°C‐weeks). A similar pattern observed during 2015–2016 El Niño event which time corals in did bleach high stress (i.e. DHWs >8°C‐weeks), lower < 8°C‐weeks). Heat assays carried out (Hurghada) (Thuwal) on four key reef‐building species confirmed different regional susceptibility, are as those north. Together, our demonstrate much higher heat tolerance than their prevailing regime would suggest. In contrast, close limits, closely match maximum annual water temperatures. The harbours live well below thresholds thus we propose represents refuge importance.

Язык: Английский

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Extending the natural adaptive capacity of coral holobionts

Nature Reviews Earth & Environment, Год журнала: 2021, Номер 2(11), С. 747 - 762

Опубликована: Окт. 12, 2021

Язык: Английский

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Rare symbionts may contribute to the resilience of coral–algal assemblages

The ISME Journal, Год журнала: 2017, Номер 12(1), С. 161 - 172

Опубликована: Дек. 1, 2017

The association between corals and photosynthetic dinoflagellates (Symbiodinium spp.) is the key to success of reef ecosystems in highly oligotrophic environments, but it also their Achilles' heel due its vulnerability local stressors effects climate change. Research during last two decades has shaped a view that coral host-Symbiodinium pairings are diverse, largely exclusive. Deep sequencing now revealed existence rare diversity cryptic Symbiodinium assemblages within holobiont, addition one or few abundant algal members. While contribution most resident species physiology widely recognized, significance low background remains matter debate. In this study, we assessed how coral-Symbiodinium communities assemble components together constitute community by analyzing 892 samples comprising >110 000 unique ITS2 marker gene sequences. Using network modeling, show non-random 'clusters' symbionts. structure follows same principles as bacterial communities, for which functional members (the 'rare biosphere') long been recognized. Importantly, inclusion taxa robustness analyses significant stability host-symbiont overall. As such, highlights potential functions symbionts may provide environmental resilience holobiont.

Язык: Английский

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Standardized short‐term acute heat stress assays resolve historical differences in coral thermotolerance across microhabitat reef sites

Global Change Biology, Год журнала: 2020, Номер 26(8), С. 4328 - 4343

Опубликована: Июнь 21, 2020

Abstract Coral bleaching is one of the main drivers reef degradation. Most corals bleach and suffer mortality at just 1–2°C above their maximum monthly mean temperatures, but some species genotypes resist or recover better than others. Here, we conducted a series 18‐hr short‐term acute heat stress assays side‐by‐side with 21‐day long‐term experiment to assess ability both approaches resolve coral thermotolerance differences reflective in situ temperature thresholds. Using suite physiological parameters (photosynthetic efficiency, whitening, chlorophyll , host protein, algal symbiont counts, type association), assessed susceptibility Stylophora pistillata colonies from windward/exposed leeward/protected sites nearshore central Red Sea, which had previously shown differential during natural event. Photosynthetic efficiency was most indicative expected higher thermal tolerance protected site, denoted by an increased retention dark‐adapted quantum yields temperatures. These were resolved using experimental setups, as corroborated positive linear relationship, not observed for other parameters. Notably, per‐colony (genotype) that may have been masked acclimation effects experiment. our newly developed portable system termed Bleaching Automated Stress System (CBASS), thus highlight potential mobile, standardized fine‐scale thermotolerance. Accordingly, such be suitable large‐scale determination complement existing identify resilient genotypes/reefs downstream examination prioritization conservation/restoration. Development framework consistent recommendations National Academy Sciences Reef Restoration Adaptation Program committees new intervention restoration strategies.

Язык: Английский

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