Coral Reefs最新文献

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Species delimitation in the sailfin blenny (Emblemaria pandionis) reveals cryptic endemic species diversity in the Greater Caribbean and Gulf of Mexico 帆鳍金鱼(Emblemaria pandionis)的物种划分揭示了大加勒比海和墨西哥湾的隐秘特有物种多样性
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-29 DOI: 10.1007/s00338-024-02495-8
Megan A. Sporre, Max D. Weber, Joshua E. Carter, Ron I. Eytan
{"title":"Species delimitation in the sailfin blenny (Emblemaria pandionis) reveals cryptic endemic species diversity in the Greater Caribbean and Gulf of Mexico","authors":"Megan A. Sporre, Max D. Weber, Joshua E. Carter, Ron I. Eytan","doi":"10.1007/s00338-024-02495-8","DOIUrl":"https://doi.org/10.1007/s00338-024-02495-8","url":null,"abstract":"<p>Life history characteristics of cryptobenthic reef fishes (CRFs), such as their fast growth and reproductive rates, near-shore larval retention and high turnover, predispose these species to rapid diversification and cryptic speciation. This may be particularly true for isolated CRF populations. The sailfin blenny, <i>Emblemaria pandionis</i>, is widespread throughout the Caribbean and is found on the reefs of the Flower Garden Banks, an isolated reef system in the NW Gulf of Mexico. Using DNA barcoding and multi-locus delimitation, we show that <i>E. pandionis</i> is a species complex comprised of at least four distinct taxonomic units in the Caribbean, one at the Flower Garden Banks, a second in eastern Florida, a third in the central Caribbean and a fourth in Curaçao. The phylogenetic relationships within the <i>E. pandionis</i> species complex are defined by well-established phylogeographic barriers to gene flow in the Caribbean. Populations of <i>E. pandionis</i> from eastern Florida are genetically distinct from populations found in the Bahamas, highlighting the role of the Florida Strait as a strong barrier to gene flow and populations in Curaçao are deeply divergent from all other populations sampled in the Caribbean. Results from this study highlight the roles of isolated reefs and ocean currents in the speciation of cryptobenthic reef fishes.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"28 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140809349","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}
引用次数: 0
DNA metabarcoding as a tool for characterising the spatio-temporal distribution of planktonic larvae in the phylum Echinodermata 将 DNA 代谢编码作为确定棘皮动物门浮游幼虫时空分布特征的工具
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-28 DOI: 10.1007/s00338-024-02496-7
Ilha Byrne, Cynthia Riginos, Sven Uthicke, Dean Brookes, Iva Popovic
{"title":"DNA metabarcoding as a tool for characterising the spatio-temporal distribution of planktonic larvae in the phylum Echinodermata","authors":"Ilha Byrne, Cynthia Riginos, Sven Uthicke, Dean Brookes, Iva Popovic","doi":"10.1007/s00338-024-02496-7","DOIUrl":"https://doi.org/10.1007/s00338-024-02496-7","url":null,"abstract":"<p>Metabarcoding is revolutionising the analysis of biodiversity in marine ecosystems, especially as it provides a means of detecting and identifying cryptic life stages in field samples. The planktonic larval stage of many species underpins the abundance and distribution of adult populations but is challenging to characterise given the small size of larvae and diffuse distributions in pelagic waters. Yet, planktonic larval dynamics are key to understanding phenomena observed in adult populations, such as the boom-and-bust dynamics exhibited by some echinoderms. Rapid changes in echinoderm population density can have significant effects on local benthic ecosystems. For example, outbreaks of the crown-of-thorns sea star (CoTS) on the Great Barrier Reef (GBR) have led to considerable declines in coral cover. Here, we used a DNA metabarcoding approach to investigate the spatio-temporal distribution and diversity of echinoderm larvae on the GBR, including CoTS. Generalised linear mixed models revealed that echinoderm larval richness, was significantly correlated with temporal variables (i.e. season and year) which is consistent with expected fluctuations in larval output based on adult spawning periodicity. However, neither site-specific differences in echinoderm larval richness, nor correlations between larval composition and environmental, temporal, or spatial variables were found. This study validates the utility of metabarcoding approaches for detecting and characterising echinoderm larvae, including CoTS, which could prove useful to future monitoring efforts. Our findings suggest that metabarcoding can be used to better understand the life history of planktonic larvae, and analyses combining environmental (e.g., temperature, nutrients) and oceanographic (e.g., currents) data could deliver valuable information on the factors influencing their spatio-temporal distributions.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"33 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140809352","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}
引用次数: 0
Steroid markers for species-specific Symbiodiniaceae: insights from molecular and δ13C measurements on four scleractinian corals 物种特异性共生藻的类固醇标记:从四种硬手珊瑚的分子和 δ13C 测量中获得的启示
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-26 DOI: 10.1007/s00338-024-02492-x
Xiaowei Zhu, Fen Chen, Guodong Jia, Pingan Peng, Hui Huang, Xiyang Zhang, Wen Yan
{"title":"Steroid markers for species-specific Symbiodiniaceae: insights from molecular and δ13C measurements on four scleractinian corals","authors":"Xiaowei Zhu, Fen Chen, Guodong Jia, Pingan Peng, Hui Huang, Xiyang Zhang, Wen Yan","doi":"10.1007/s00338-024-02492-x","DOIUrl":"https://doi.org/10.1007/s00338-024-02492-x","url":null,"abstract":"<p>Endosymbiotic dinoflagellates in the family Symbiodiniaceae are physiologically and ecologically important for reef-building corals. Certain symbiotic lineages may provide adaptive functions that aid corals in coping with and surviving rapid environmental and climate changes; and thus, there is a growing interest in exploring Symbiodiniaceae communities and their associated roles. Steroid biomarkers have been proposed as a means of identifying species-specific symbionts, but their reliability has yet to be examined through comparison of different coral species that harbor known Symbiodiniaceae. Here, steroid molecular and <i>δ</i><sup>13</sup>C analyses are applied to four stony corals that host identified (<i>Porites lobata</i> and <i>Galaxea fascicularis</i>) or undescribed (<i>Goniopora tenuidens</i> and <i>Goniastrea minuta</i>) Symbiodiniaceae to address this issue. The 23-Me C<sub>28</sub>Δ<sup>5,22</sup>, 23,24-Me C<sub>29</sub>Δ<sup>5,22</sup>, and dinosterol are characteristic of <i>P. lobata</i>; while, C<sub>29</sub>Δ<sup>5</sup>, gorgosterol, and 4α-methylgorgostanol are diagnostic for <i>G. fascicularis</i>, tracking the marked differences in their Symbiodiniaceae assemblages. These two steroid groups also exhibit largely similar (− 20.6 to − 17.0‰) and visibly variable (− 24.1 to − 17.3‰) <i>δ</i><sup>13</sup>C signatures, following the low and high diversity of symbionts in <i>P. lobata</i> and <i>G. fascicularis</i>, respectively. Our present results, together with previous reports, clearly demonstrate the effectiveness of steroid molecular and <i>δ</i><sup>13</sup>C features in depicting Symbiodiniaceae population, providing a useful complement to Symbiodiniaceae genetic analysis. A further comparison of steroid characteristics between unclear and known Symbiodiniaceae in our four corals reveals the almost identical symbiotic population between <i>G. minuta</i> and <i>G. fascicularis</i> and a restricted range of symbiotic composition in <i>G. tenuidens</i> that is shared with <i>G. fascicularis</i> (and <i>G. minuta</i>). Additionally, the occurrence of 5α-stanols suggestive of anaerobic conversion on Δ<sup>5</sup>-sterols implies complex steroid interactions within coral–algae–microbe holobionts.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"52 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140802845","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}
引用次数: 0
Variation in species and functional composition of octocorals and zoantharians across a tropical to temperate environmental gradient in the Indo-Pacific 印度洋-太平洋从热带到温带环境梯度上的章鱼和藻类物种和功能组成的变化
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-20 DOI: 10.1007/s00338-024-02487-8
Nori Otis, James D. Reimer, Iori Kawamura, Hiroki Kise, Masaru Mizuyama, Masami Obuchi, Brigitte Sommer, Catherine S. McFadden, Maria Beger
{"title":"Variation in species and functional composition of octocorals and zoantharians across a tropical to temperate environmental gradient in the Indo-Pacific","authors":"Nori Otis, James D. Reimer, Iori Kawamura, Hiroki Kise, Masaru Mizuyama, Masami Obuchi, Brigitte Sommer, Catherine S. McFadden, Maria Beger","doi":"10.1007/s00338-024-02487-8","DOIUrl":"https://doi.org/10.1007/s00338-024-02487-8","url":null,"abstract":"<p>Global warming causes functional shifts and reorganisation in marine communities through range shifts to high-latitude reefs and cnidarian bleaching mortality in the tropics. Such changes threaten the integrity and structure of marine communities, especially as foundational and associated species are reduced or lost. However, comparatively little is known about the extent of range shifts and their ecological consequences for the overlooked components of marine ecosystems, such as octocorals and zoantharians (O + Z) on shallow coral reefs. As these groups play a crucial part in building complexity and sustaining life in reef communities, functional shifts in these taxa may cascade through the entire ecosystem, but these processes have not been quantified. Here, we examined the environmental drivers and functional consequences of spatial variation in octocoral and zoantharian communities across 27 sites in southern Japan, spanning from tropical to warm-temperate waters. We collated a trait database for 42 entities (species, genus, and family level identifications) of octocorals and zoantharians and calculated functional diversity and functional richness to measure functional compositional change. We identified five functional groups according to their trait similarities and identified how their abundances respond to changing environmental factors with general additive models (GAMs). We found functional shifts among octocorals and zoantharians across the tropical to temperate thermal gradient, with the abundances of two functional groups best explained by gradients in minimum sea surface temperature. Non-linear relationships between the functional groups and thermal gradients imply a more intricate relationship than expected, suggesting other non-temperature-based drivers, e.g., nitrogen or pH levels might also play an important role. Only functional group richness and species richness showed significant correlations with latitude, whilst functional diversity and functional richness did not. Our results indicate that octocoral and zoantharian communities and functionality potentially undergo shifts with clear community compositional changes, influenced by climate change across environmental gradients. However, the taxonomy and identification of these taxa remain difficult, and information on functional traits is often sparse or not species-specific, indicating a clear need for further basic zoological and ecological work on octocorals and zoantharians.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"31 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140625343","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}
引用次数: 0
Low light intensity increased survival of coral spat in aquaculture 低光照强度提高了水产养殖中珊瑚幼体的存活率
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-20 DOI: 10.1007/s00338-024-02489-6
B. D. Ramsby, F. Emonnot, F. Flores, S. Schipper, G. Diaz-Pulido, M. A. Abdul Wahab, A. Severati, A. P. Negri
{"title":"Low light intensity increased survival of coral spat in aquaculture","authors":"B. D. Ramsby, F. Emonnot, F. Flores, S. Schipper, G. Diaz-Pulido, M. A. Abdul Wahab, A. Severati, A. P. Negri","doi":"10.1007/s00338-024-02489-6","DOIUrl":"https://doi.org/10.1007/s00338-024-02489-6","url":null,"abstract":"<p>Coral reef ecosystems are declining and may not recover under future climate scenarios without intervention. Seeding reefs with corals bred in aquaculture is a promising restoration intervention; however, early coral recruits (spat) are vulnerable to overgrowth by benthic algae and maximizing their survival is essential for the feasibility of large-scale breeding operations. This study investigated the optimal light quality and intensity for spat survival and growth in the presence of algal communities typically used in coral aquaculture to induce larval settlement, but which might also outcompete spat and reduce survival during the grow-out period. Spat were exposed to two light spectra (blue and a full spectrum) at four light intensities (5–160 µmol m<sup>−2</sup> s<sup>−1</sup>) over 12-week post-settlement. Survival was reduced under the highest intensity by nearly 40% compared to the lowest intensity. Light spectrum only affected survival at 60 µmol m<sup>−2</sup> s<sup>−1</sup>—where survival was higher under blue compared to full spectrum light. Light treatments did not affect final spat size but spat were 33% smaller at the highest light intensity in weeks 6 and 8 due to overgrowth by crustose coralline algae (CCA), which was most abundant under these conditions. Low light intensity, on the other hand, favored green and brown algae, potentially due to their respective physiologies or less competition from crustose coralline algae. These results indicate that low light intensity presents several advantages for maintaining spat in coral aquaculture, including maximizing survival without significantly affecting growth, as well as minimizing husbandry and operating expenses.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"4 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140625528","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}
引用次数: 0
The influence of Sargassum biomass and thallus density on the recruitment of coral reef fishes 马尾藻生物量和苔藓密度对珊瑚礁鱼类繁殖的影响
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-20 DOI: 10.1007/s00338-024-02494-9
Kelsey Webber, Katharina Fabricius, Shaun K. Wilson, Andrew S. Hoey
{"title":"The influence of Sargassum biomass and thallus density on the recruitment of coral reef fishes","authors":"Kelsey Webber, Katharina Fabricius, Shaun K. Wilson, Andrew S. Hoey","doi":"10.1007/s00338-024-02494-9","DOIUrl":"https://doi.org/10.1007/s00338-024-02494-9","url":null,"abstract":"<p>A habitat’s structural complexity is a key determinant of the recruitment and composition of associated communities. While the influence of the physical structure of corals on coral reef fish recruitment is well studied, the significance of other benthic components, like macroalgae, remains unclear. We used experimental patches of the canopy-forming macroalga <i>Sargassum</i> to assess the influence of macroalgal complexity, which was manipulated by altering thallus density and biomass, on coral reef fish recruitment. We established twenty-five 75 × 75 cm patches on the reef flat of Orpheus Island, (inshore, central Great Barrier Reef) during austral summer. Patches were randomly divided into five treatments of varying <i>Sargassum</i> thallus density (3–9 thalli) and/or biomass (177–779 g per patch) and surveyed daily for recruiting fishes for 18 d. We recorded 35 fish species recruiting to our patches, with <i>Sargassum</i> biomass having the greatest influence on fish recruits’ abundance and species richness. Comparisons between treatments with equal thallus density but varying biomass revealed a positive association between <i>Sargassum</i> biomass and fish species richness and abundance (up to ~ 2.5-fold differences). Additionally, treatments with similar total <i>Sargassum</i> biomass but different density revealed a negative relationship between density and fish species richness and abundance (20–30% reduction). These positive associations with <i>Sargassum</i> thallus biomass suggest that recruiting fishes favour the fine-scale complexity of intra-thallus spaces, rather than the larger, inter-thallus gaps. This study highlights that fine-scales of complexity within tropical macroalgal beds may influence the reef fish recruitment value of these often-underappreciated areas.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"212 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140629459","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}
引用次数: 0
Geochemical evidence of temporal ecosystem photosynthetic plasticity within a pristine coral atoll 原始珊瑚环礁生态系统光合作用时间可塑性的地球化学证据
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-18 DOI: 10.1007/s00338-024-02493-w
Isaiah W. Bolden, Julian P. Sachs, Alexander C. Gagnon
{"title":"Geochemical evidence of temporal ecosystem photosynthetic plasticity within a pristine coral atoll","authors":"Isaiah W. Bolden, Julian P. Sachs, Alexander C. Gagnon","doi":"10.1007/s00338-024-02493-w","DOIUrl":"https://doi.org/10.1007/s00338-024-02493-w","url":null,"abstract":"<p>The impacts of ocean acidification on coral reef macroalgal community composition and metabolism have implications for the habitat supporting capacity of future reefs. In this pilot study, we use co-located semi-hourly measurements of total dissolved inorganic carbon (DIC), total alkalinity, and the stable carbon isotope composition of DIC (<i>δ</i><sup>13</sup>C<sub>DIC</sub>) over a 27 + h period from Tetiaroa Atoll, French Polynesia, to investigate the potential for reef carbonate chemistry to record information related to benthic photosynthetic community composition and response to natural gradients in ambient acidity and dissolved carbon dioxide. The results of this preliminary sampling and modeling exercise suggest that Tetiaroa’s macroalgal communities express plastic carbon-concentrating mechanisms (CCMs) over daily cycles of productivity but may potentially vary this expression as a function of ambient CO<sub>2</sub> and acidity within the ecosystem. Additional studies are, therefore, underway to investigate the implications of these observations for reef macroalgal compositional differences under rapidly acidifying oceans.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"13 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611972","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}
引用次数: 0
“Hidden” biodiversity: a new amphipod genus dominates epifauna in association with a mesophotic black coral forest "隐藏的 "生物多样性:一种新的片脚类动物属在与中生黑珊瑚林有关的附生动物中占主导地位
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-15 DOI: 10.1007/s00338-024-02491-y
Sandra Navarro-Mayoral, Benoit Gouillieux, Victoria Fernandez-Gonzalez, Fernando Tuya, Ninon Lecoquierre, Lorenzo Bramanti, Lucas Terrana, Fernando Espino, Jean-François Flot, Ricardo Haroun, Francisco Otero-Ferrer
{"title":"“Hidden” biodiversity: a new amphipod genus dominates epifauna in association with a mesophotic black coral forest","authors":"Sandra Navarro-Mayoral, Benoit Gouillieux, Victoria Fernandez-Gonzalez, Fernando Tuya, Ninon Lecoquierre, Lorenzo Bramanti, Lucas Terrana, Fernando Espino, Jean-François Flot, Ricardo Haroun, Francisco Otero-Ferrer","doi":"10.1007/s00338-024-02491-y","DOIUrl":"https://doi.org/10.1007/s00338-024-02491-y","url":null,"abstract":"<p>Black corals are important components of mesophotic and deep-water marine habitats. Their presence at great depths (e.g., 50 to 200 m) makes accessibility difficult, limiting our understanding of the associated biodiversity. Amphipods dominate vagile epifauna in marine habitats around the world, fulfilling important ecosystem functions. However, there are no studies on amphipods exclusively associated with black corals, including relationships between their ecological patterns (e.g., abundances) and the size of coral colonies. We investigated the epifaunal composition and abundance associated with black coral colonies of <i>Antipathella wollastoni</i> in the subtropical eastern Atlantic Ocean. In total, 1,736 epifaunal individuals were identified, of which 1,706 (98.27%) were amphipods, belonging to 6 taxa. We identified and described a new amphipod genus and species within the Stenothoidae family, <i>Wollastenothoe minuta</i> gen. nov., sp. nov., which outnumbered the amphipod assemblage (86.15%) and provided a complete taxonomic key of Stenothoidae family including this new finding. For the first time, the association between an amphipod species and a black coral was described, including a strong correlation between coral colony size and amphipod abundances. This study demonstrates that epifauna associated with mesophotic black corals remains largely undescribed.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140583916","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}
引用次数: 0
Local habitat heterogeneity rivals regional differences in coral thermal tolerance 当地栖息地的异质性与珊瑚耐热性的区域差异相匹配
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-03 DOI: 10.1007/s00338-024-02484-x
Kristen T. Brown, Marcelina P. Martynek, Katie L. Barott
{"title":"Local habitat heterogeneity rivals regional differences in coral thermal tolerance","authors":"Kristen T. Brown, Marcelina P. Martynek, Katie L. Barott","doi":"10.1007/s00338-024-02484-x","DOIUrl":"https://doi.org/10.1007/s00338-024-02484-x","url":null,"abstract":"<p>Variable temperature regimes that expose corals to sublethal heat stress have been recognized as a mechanism to increase coral thermal tolerance and lessen coral bleaching. However, there is a need to better understand which thermal regimes maximize coral stress hardening. Here, standardized thermal stress assays were used to determine the relative thermal tolerance of three divergent genera of corals (<i>Acropora</i>, <i>Pocillopora</i>, <i>Porites</i>) originating from six reef sites representing an increasing gradient of annual mean diel temperature fluctuations of 1–3 °C day<sup>−1</sup>. Bleaching severity and dark-acclimated photochemical yield (i.e., <i>F</i><sub>v</sub>/<i>F</i><sub>m</sub>) were quantified following exposure to five temperature treatments ranging from 23.0 to 36.3 °C. The greatest thermal tolerance (i.e., <i>F</i><sub>v</sub>/<i>F</i><sub>m</sub> effective dose 50) was found at the site with intermediate mean diel temperature variability (2.2 °C day<sup>−1</sup>), suggesting there is an optimal priming exposure that leads to maximal thermal tolerance. Interestingly, <i>Acropora</i> and <i>Pocillopora</i> originating from the least thermally variable regimes (&lt; 1.3 °C day<sup>−1</sup>) had lower thermal tolerance than corals from the most variable sites (&gt; 2.8 °C day<sup>−1</sup>), whereas the opposite was true for <i>Porites</i>, suggesting divergent responses across taxa. Remarkably, comparisons across global studies revealed that the range in coral thermal tolerance uncovered in this study across a single reef (&lt; 5 km) were as large as differences observed across vast latitudinal gradients (300–900 km). This finding indicates that local gene flow could improve thermal tolerance between habitats. However, as climate change continues, exposure to intensifying marine heatwaves is already compromising thermal priming as a mechanism to enhance coral thermal tolerance and bleaching resistance.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"158 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140583708","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}
引用次数: 0
Modeling the potential spread of the non-native regal demoiselle, Neopomacentrus cyanomos, in the western Atlantic 非本地蓑鲉(Neopomacentrus cyanomos)在西大西洋的潜在传播模型
IF 3.5 2区 生物学
Coral Reefs Pub Date : 2024-04-01 DOI: 10.1007/s00338-024-02490-z
Melanie M. Esch, Catherine S. Jarnevich, Nuno Simões, Timothy R. McClanahan, Alastair R. Harborne
{"title":"Modeling the potential spread of the non-native regal demoiselle, Neopomacentrus cyanomos, in the western Atlantic","authors":"Melanie M. Esch, Catherine S. Jarnevich, Nuno Simões, Timothy R. McClanahan, Alastair R. Harborne","doi":"10.1007/s00338-024-02490-z","DOIUrl":"https://doi.org/10.1007/s00338-024-02490-z","url":null,"abstract":"<p>Predicting the potential distribution of a non-native species can assist management efforts to mitigate impacts on recipient ecosystems. However, such predictions are lacking for marine species, such as the non-native regal demoiselle, <i>Neopomacentrus cyanomos</i>, that is currently expanding its distribution in the western Atlantic. We used correlative species distribution models with three common algorithms to predict suitable habitat for <i>N. cyanomos</i> in the region. We compared models developed using native, non-native, and global occurrences to differentiate drivers across separate ranges using a suite of 12 environmental characteristics. While final models included an ensemble of variables, the majority ranked the combined effect of temperature variables as a key predictor correlated with the distribution of <i>N. cyanomos.</i> Habitat suitability increased as water temperatures increased beyond 16 °C and where annual thermal ranges were greater than 10 °C at the shallowest depth with substrate within a study cell (~ 9.2 km<sup>2</sup> resolution). Habitat suitability also increased where maximum surface temperatures were greater than 27 °C. In the non-native range, the proportion of reef available in each cell was another important variable increasing the suitable habitat for <i>N. cyanomos</i>. Our models predicted high habitat suitability for <i>N. cyanomos</i> throughout the Greater Caribbean, in higher latitudes along North and South American Atlantic coasts, in the eastern Pacific Ocean, and highlights key areas where managers can monitor and target potential removal efforts. The distribution of this non-native species is likely to continue expanding throughout the region with little known about potential implications on native communities.</p>","PeriodicalId":10821,"journal":{"name":"Coral Reefs","volume":"6 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140583802","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}
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