Coral Reefs最新文献

{"title":"The hydrodynamics of Lizard Island lagoon, Great Barrier Reef","authors":"Caitlin J. Philipps, David R. Bellwood","doi":"10.1007/s00338-024-02511-x","DOIUrl":"https://doi.org/10.1007/s00338-024-02511-x","url":null,"abstract":"<p>Hydrodynamic processes are a major driver for marine systems, linking marine organisms with their environment. However, a lack of hydrodynamic data at an ecologically relevant spatial resolution has stymied our understanding of reef function, as exemplified by Lizard Island on the Great Barrier Reef. To address this gap, 23 to 27 Marotte HS current meters were deployed over three periods, collecting 15 months of current velocity data. Combining these data with wind and tide datasets, we provide a preliminary description of the circulation in the Lizard Island lagoon, examining wind and tide influence, and flushing time. During south-easterly trade winds, flood tides flow through the Lagoon Entrance, while wind-induced waves cross the Bird-South crest, driving a north-westerly flow through Loomis Channel and across the western lagoon. Ebb tides flow east–south-east through the Lagoon Entrance and south-west through the Palfrey-South channel. Tides contribute a mean of 20.4% to the overall current speed, particularly in deeper sites with less reef interference, while shallow sites were more influenced by wind. Lizard Island lagoon flushing times ranged from a few hours to 10 days; longer during periods with low wind speeds. Hindcast flushing times during the 2016 coral bleaching event (following 8 Degree Heating Weeks) were approximately 22 h, suggesting that flushing time likely had minimal influence on bleaching. Our analyses provide initial insights into the circulation of the Lizard Island system and aid understanding of the potential relationships between reef organisms and their physical environment, bridging the gap between ecology and hydrodynamics.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"10 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coral-associated Symbiodiniaceae dynamics during the 2016 mass bleaching event in New Caledonia","authors":"Tullia I. Terraneo, Fanny Houlbreque, Roberto Arrigoni, Benedetta Longari, Michael L. Berumen, Benjamin C. C. Hume, Sylvie Fiat, Riccardo Rodolfo-Metalpa, Claude E. Payri, Christian R. Voolstra, Francesca Benzoni","doi":"10.1007/s00338-024-02510-y","DOIUrl":"https://doi.org/10.1007/s00338-024-02510-y","url":null,"abstract":"<p>The ecological success of shallow water corals hinges on their association with photosynthetic Symbiodiniaceae algae. This is affected by environmental drivers among which sea temperature is pivotal. In 2016, a prolonged heat wave challenged New Caledonia reefs triggering a severe bleaching event. Here, we tracked 72 coral colonies comprising two species of <i>Pocillopora</i> and <i>Porites</i> from a cross-shelf gradient during the event and subsequent recovery period. Symbiodiniaceae association over time was assessed using the ITS2 marker. Bleaching prevalence and photosynthetic efficiency showed that 83% of <i>Pocillopora</i> and 29% of <i>Porites</i> colonies were affected, with corals from a mid-shelf site having been most impacted. The majority of tracked colonies recovered by December 2016, with a recorded 33% mortality of <i>Pocillopora,</i> while <i>Porites</i> showed higher resilience. Consistent with previous studies, genotyping data suggest stable, species- and site-specific associations between corals and Symbiodiniaceae.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"27 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Fourth Global Coral Bleaching Event: Where do we go from here?","authors":"James Davis Reimer, Raquel S. Peixoto, Sarah W. Davies, Nikki Traylor-Knowles, Morgan L. Short, Rafael A. Cabral-Tena, John A. Burt, Igor Pessoa, Anastazia T. Banaszak, R. Scott Winters, Tom Moore, Verena Schoepf, Deepeeka Kaullysing, Luis E. Calderon-Aguilera, Gert Wörheide, Simon Harding, Vikash Munbodhe, Anderson Mayfield, Tracy Ainsworth, Tali Vardi, C. Mark Eakin, Morgan S. Pratchett, Christian R. Voolstra","doi":"10.1007/s00338-024-02504-w","DOIUrl":"https://doi.org/10.1007/s00338-024-02504-w","url":null,"abstract":"","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"326 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new type of Halimeda bioherm on the Queensland Plateau, NE Australia","authors":"Jesus Reolid, Or M. Bialik, Sebastian Lindhorst, Jan Oliver Eisermann, Alexander Petrovic, Carola Hincke, Robin J. Beaman, Jody M. Webster, Christian Betzler","doi":"10.1007/s00338-024-02500-0","DOIUrl":"https://doi.org/10.1007/s00338-024-02500-0","url":null,"abstract":"<p>Morphology, internal structure, and in situ facies distribution of mesophotic <i>Halimeda</i> bioherms from the Queensland Plateau (NE Australia) are presented based on hydroacoustic and oceanographic data, seafloor observations, and discrete sediment sampling carried out during RV SONNE cruise SO292 in 2022. <i>Halimeda</i> buildups consist of cone-like mounds up to 500 m in diameter and 3–10 m high, with gentle slopes (2°–5° on the top of Tregrosse Bank). Bioherms occur in water depths of 10–70 m, with most bioherm between 50 and 65 m. Their internal structure consists of aggrading low-amplitude reflections at the core of the bioherm interfingering with high-amplitude reflections to the flanks. Surface facies distribution displays one to four facies belts, from distal to proximal: <i>Halimeda</i> rudstone, <i>Halimeda</i> rudstone with living plants, <i>Halimeda</i> rudstone with coralgal debris, and coralgal boundstone (when present, occupied the top of the bioherms). It is proposed that the alternation of two key processes contributes to the formation of these bioherms: (1) in situ accumulation of <i>Halimeda</i> debris and (2) episodic dismantling of the mesophotic coralgal boundstone at the centre of the bioherm by severe storms. These storms may dismantle the mesophotic reef and export coralgal rubble to the flanks. Flanks may be recolonized by <i>Halimeda</i> during fair-weather periods. Due to their different geomorphic expressions, complex internal structure, and surficial facies distribution, we suggest that the buildups of the Queensland Plateau represent a new <i>Halimed</i>a bioherm morphotype, distinct from previously described bioherms on the adjacent Great Barrier Reef and elsewhere globally.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"21 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proton-pumping rhodopsin of the coral symbiont Breviolum minutum and its potential role in coping with phosphorus deficiency in future warmer ocean","authors":"Minglei Ma, Yanchun You, Yulin Huang, Xueqiong Sun, Jiashun Li, Ling Li, Yujie Wang, Senjie Lin","doi":"10.1007/s00338-024-02507-7","DOIUrl":"https://doi.org/10.1007/s00338-024-02507-7","url":null,"abstract":"<p>Global warming can inhibit chlorophyll-based solar energy capturing of phytoplankton by decreasing nutrient supply through upwelling. However, species with proton-pump rhodopsin (PPR) can independently convert solar energy to cope with nutrient limitation. Besides prokaryotes, PPR has been documented in dinoflagellates and some species of other algal lineages, and its potential role in compensating for the deficiency of phosphorus has been demonstrated in dinoflagellates. However, PPR has not been studied in the coral reef endosymbiotic Symbiodiniaceae. Here, we report a PPR in <i>Breviolum minutum</i> (<i>Bm</i>R). Both phylogenetic analysis and structure prediction results indicate that <i>Bm</i>R resembles eukaryotic proton-pump rhodopsins, phylogenetically affiliated with the subgroup xanthorhodopsins. <i>Bm</i>R contains the critical residues for proton pumping, retinal binding, and spectrum tuning for green absorption. To explore <i>Bm</i>R’s potential roles in responding to phosphorus limitation, we cultured <i>B. minutum</i> under different phosphorus conditions, and monitored physiological and <i>Bm</i>R’s transcriptional responses. Phosphorus limitation caused decreases in <i>B. minutum</i> population growth and photosynthesis efficiency. Meanwhile, our quantitative PCR showed that <i>Bm</i>R expression was strongly upregulated under phosphorus limitation, showing a strong positive correlation with alkaline phosphatase activity and a negative correlation with photosynthetic efficiency. Our findings demonstrate that proton-pump rhodopsin occurs in Symbiodiniaceae and <i>Bm</i>R has the potential to provide supplementary energy to support cell basal metabolisms when photosynthesis of <i>B. minutum</i> is impaired by phosphorus limitation, thereby enabling corals to better weather climate change.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"129 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141167077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"eDNA monitoring detects new outbreak wave of corallivorous seastar (Acanthaster cf. solaris) at Lizard Island, Great Barrier Reef","authors":"Sven Uthicke, Jason R. Doyle, Maria Gomez Cabrera, Frances Patel, Madi J. McLatchie, Peter C. Doll, Josie F. Chandler, Morgan S. Pratchett","doi":"10.1007/s00338-024-02506-8","DOIUrl":"https://doi.org/10.1007/s00338-024-02506-8","url":null,"abstract":"<p>Crown-of-thorns seastar (CoTS, <i>Acanthaster</i> cf. <i>solaris</i>) outbreaks remain a significant cause of coral loss on the Great Barrier Reef (GBR) and across the West-Pacific Ocean. Previous outbreaks on the GBR have only been discovered once fully established, which constrains opportunities for effective control. Early detection of outbreaks would provide an important opportunity for early intervention and increase understanding of outbreak cause(s). Here, we assess the utility of environmental DNA (eDNA) monitoring to detect the initiation of a population outbreak at Lizard Island over five years (2019–2023), compared with density estimates obtained using Scooter-Assisted Large Area Diver-based (SALAD) surveys. At each of the five eDNA sampling sites, 30 replicate samples were collected annually and analysed with CoTS-specific primer sets and digital droplet PCR. Both methods detected distinct increases in CoTS densities from 2020/21 onwards, indicating the start of a new population outbreak. A large part of the observed variation in eDNA (expressed as the percentage of positive samples) was explained by changes in recorded CoTS density, confirming that eDNA data provide a quantitative estimate for adult CoTS abundance. SALAD surveys and eDNA are new and complementary monitoring methods that facilitate early detection of CoTS outbreaks, which will enable more effective management intervention.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"68 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141167349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changing dynamics of Great Barrier Reef hard coral cover in the Anthropocene","authors":"Michael J. Emslie, Daniela M. Ceccarelli, Murray Logan, Makeely I. Blandford, Peran Bray, Adriana Campili, Michelle J. Jonker, Joshua G. Parker, Tara Prenzlau, Tane H. Sinclair-Taylor","doi":"10.1007/s00338-024-02498-5","DOIUrl":"https://doi.org/10.1007/s00338-024-02498-5","url":null,"abstract":"<p>Cycles of disturbance and recovery govern the temporal dynamics of living coral cover on coral reefs. Monitoring the state of the Great Barrier Reef at regional and individual reef scales has been ongoing by the Long-Term Monitoring Program at the Australian Institute of Marine Science since 1986. After a period of relative stability between 1986 and 2010, the latest decade of surveys recorded increased frequency of intense, large-scale disturbance events and coral cover has reached unprecedented lows and highs in each region. Following the consecutive bleaching events in 2016 and 2017, widespread recovery occurred on the northern and central Great Barrier Reef between 2017 and 2022, which was halted in 2023. An examination of the effects of the 2022 bleaching event revealed that the direct and indirect impacts of this event, along with ongoing crown-of-thorns starfish outbreaks, notable incidences of coral disease, and the passage of a tropical cyclone all contributed to the most recent coral cover changes across the Great Barrier Reef. The prognosis for future disturbances suggests increasing and longer-lasting marine heatwaves, continuing severe tropical cyclones and the ongoing risk of outbreaks of crown-of-thorns starfish. Although the observed capacity for recovery is a cause for cautious optimism for the overall state of the Great Barrier Reef, there is increasing concern for its ability to continue to bounce back in the face of escalating climatic pressure.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"2014 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bleaching and recovery in the giant clam Tridacna crocea from the sub-tropical waters of Okinawa","authors":"Sherry Lyn G. Sayco, Haruko Kurihara","doi":"10.1007/s00338-024-02502-y","DOIUrl":"https://doi.org/10.1007/s00338-024-02502-y","url":null,"abstract":"<p>Heat stress-induced bleaching has been shown to lower the photosynthetic and physiological performances and even causes mortality in giant clams. However, there is a lack of information on the responses of sub-tropical giant clams to bleaching stress as well as their recovery from bleaching. Here we exposed the giant clams <i>Tridacna crocea</i> from sub-tropical Okinawa to different temperature conditions for 21 days and then examined their recovery at control temperatures (28–29 °C) within 42 days. <i>T. crocea</i> in control and in 30–31 °C retained their colors, whereas bleaching was observed in 32–33 °C and in the increasing temperatures (29–33 °C, 1 °C change every 5 days). The <i>F</i>_<i>v</i>/<i>F</i>_<i>m</i> decreased at 32–33 °C and in the increasing temperatures (29–33 °C), even before the onset of bleaching, but the <i>F</i>_<i>v</i>/<i>F</i>_<i>m</i> returned to baseline values at day 9 of recovery period. Zooxanthellae density and chlorophyll a + c concentrations were decreased, whereas the zooxanthellae cell size was increased in all elevated temperatures at day 21 of exposure period. Respiration (<i>R</i>) in all temperature conditions was not affected during exposure period, whereas gross photosynthesis (<i>P</i>_g) and <i>P</i>_g/<i>R</i> were reduced at 32–33 °C. At day 42 of recovery period, most bleached individuals regained their colors, phototrophic potential, and zooxanthellae population. No giant clams died within 21 days of exposure period, but mortalities were observed at 32–33 °C and at increasing temperatures (29–33 °C) during recovery period. This study shows that the sub-tropical giant clams are vulnerable to heat stress, but their ability to recover may suggest their persistence in a warming ocean.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"155 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution and ecology of shallow-water black corals across a depth gradient on Galápagos rocky reefs","authors":"Marisa Agarwal, Robert W. Lamb, Franz Smith, Jon D. Witman","doi":"10.1007/s00338-024-02497-6","DOIUrl":"https://doi.org/10.1007/s00338-024-02497-6","url":null,"abstract":"<p><i>Antipathes galapagensis</i> is a prevalent habitat-forming black coral in subtidal ecosystems of the Galápagos Marine Reserve (GMR). Despite their ecological importance and status as a CITES-regulated order, little is known about their depth distribution, population structure and ecology in the GMR. Surveys were conducted in 2021 and 2022 at 9 sites in the central Galápagos Archipelago to investigate how black coral densities, occupancy, size, habitat utilization, and epizoan overgrowth varied between 2.0 and 20.0 m depth. The shallowest black corals occurred at 3.4 m depth, one of the shallowest occurrences of an <i>Antipathes</i> spp. in the world. Coral density increased with depth, with a maximum density of 5.2 colonies per m² observed across the depth range surveyed. Occupancy modeling also yielded curves with increasing probabilities of black coral presence with depth at all sites. Colony height increased with depth at 8 out of 9 sites and was positively correlated with coral density at 6 of 9 sites. Overall, 47% of colonies surveyed occupied cryptic habitats and 53% were attached to exposed substrate, but black coral habitat usage patterns varied with depth at 5 of 9 sites. At these sites, colonies on shallower transects (5.0, 10.0 m depth) more frequently displayed cryptic habitat usage while colonies along the deeper transects (15.0, 20.0 m) were more often exposed. In general, coral density, probability of occupancy, height, and exposed habitat utilization increased with depth, while the average degree of overgrowth and number of epibiont taxa were unrelated to depth. Five hypotheses regarding factors potentially limiting the shallow (upper) depth distribution of <i>A. galapagensis</i>—ranging from negative impacts of the physical environment to high predation on exposed substrates—are presented for future testing. These results provide a comprehensive ecological characterization of Galápagos black coral populations that can be used to assess the impact of future environmental change and applied to management decisions for this key marine foundation species in the GMR.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"93 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microbial characterization of the first occurrence of White Plague disease in the endemic brain coral Mussismilia hispida at Alcatrazes Archipelago, Brazil","authors":"Aline Aparecida Zanotti, Kátia Cristina Cruz Capel, Marcelo Visentini Kitahara","doi":"10.1007/s00338-024-02499-4","DOIUrl":"https://doi.org/10.1007/s00338-024-02499-4","url":null,"abstract":"<p>Endemic to the Brazilian fauna, the brain coral <i>Mussismilia hispida</i> is the second most widespread zooxanthellate coral of the South-west Atlantic and, most importantly, is within the main reef-building species of the region. Counterintuitively, <i>M. hispida</i> has one of its most abundant populations near its southernmost distributional limit, the Alcatrazes Archipelago off the coast of São Paulo State. On this archipelago, colonies thrive from 2 to over 20 m deep, and in some localities, <i>M. hispida</i> covers more than 50% of the rocky shore. Although more resistant to bleaching than other coral species, a capacity enhanced by colder water resurgence around the archipelago, signs of a coral disease affecting some colonies were recorded in 2019, simultaneously with a severe bleaching event. Diseased corals had tissue loss and a distinct white lesion on the corals’ tissue, suggesting that it may be a White Plague disease. Using 16S rRNA metabarcoding, we compared the microbial community associated with the part of the colonies presenting signs of disease to those apparently healthy. Results indicate that the microbiota genera from healthy and diseased colony portions are highly variable, suggesting community dysbiosis and alterations in the metabolic pathways of the microbiome. While it was not possible to identify a pathogen or a pathogenic consortium associated with the disease, the overall microbial signature, characterized by the presence of <i>Roseimarinus</i>, <i>Carboxylicivirga</i>, <i>Tepidibacter</i>, <i>Vallitalea</i>, and <i>Halodesulfovibrio</i>, is similar to that found in diseased Caribbean massive corals.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"20 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}