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"Today, warm-water coral reefs are limited to tropical-to-subtropical latitudes. " We explore the role of climate and palaeogeography in determining coral reef distribution over geological timescales here. To do so, we integrate habitat suitability analysis, Earth System modeling, and the 247-million-year geological record of scleractinian coral reefs. Due to an extended tropical belt and more equiable distribution of shallow marine substrate, a broader latitudinal distribution of climatically suitable habitat persisted throughout much of the Mesozoic u2013early Paleogene. Though our findings show that global warming could facilitate long-term poleward range expansions, coral reef ecosystems are unlikely to keep up with the rapid rate of anthropogenic climate change. Today, warm-water coral reefs are limited to tropical and subtropical latitudes, but they have remained poleward in the geological past. This report shows that climatic and tectonic factors contributed to the past distribution of coral reefs and associated wildlife.
Source link: https://doi.org/10.1038/s41467-022-30793-8
"The Banco Chinchorro Reef is an area of high ecological value, impacted by Hurricane Dean in 2007 and tropical storm Karl in 2010. i species richness, rarity, and composition were determined before and after the meteor strike; ii beta diversity; ii taxonomic identity; and an iv relationship between species composition and benthic habitat. The findings revealed that Hurricane Dean and tropical storm Karl had temporarily altered fish populations. The fish assemblage in Banco Chinchorro is trending toward a state similar to that found before Hurricane Dean and Storm Karl's arrival; this data shows that this biological species is resilient and resilient despite strong natural forces. Reef fish species can recolonization of reef fish species based on the ecosystem's conditions, according to our findings.
Source link: https://doi.org/10.1007/s42974-022-00093-8
"Surgeonfishes have a long evolutionary history that has been closely associated with coral reef ecosystems," says the author. However, coral reefs are at the forefront of environmental change, with a combination of stressors that have pushed these ecosystems into new configurations. The role of surgeonfishes in these ecosystems may be shifting, and our knowledge of these fishes must now be considered in a context of change. We review the literature on surgeonfishes and investigate how their key roles on coral reefs have changed over the past 50 million years, the key roles played by surgeons on modern-day coral reefs, and how their roles will change in the near future. We also highlighted how surgeonfishes may continue to play increasingly important parts in supporting key functions and services on new and existing coral reefs.
Source link: https://doi.org/10.1007/s11160-021-09692-6
"In a patient with a degenerative thoracic aneurysm and a coral reef aorta, we discuss a practical strategy for transfemoral TEVAR. " After establishing a filter catheter in the abdominal aorta by a contralateral percutaneous femoral access, a working channel in the distal thoracic aorta was established with a balloon-expandable stent graft in the coral reef segment was developed.
Source link: https://doi.org/10.1007/s00270-022-03147-6
"We use the variational limiting equilibrium method to experimentally determine the slope stability of coral reefs covered with hard reef shells as a result of horizontal wave loads in this work. " We found the stability factor N _ s of coral reefs under combined vertical self-gravity and horizontal wave loads in the N _ s, which is consistent with the published findings. The analysis revealed that the presence of a hard reef shell could increase the stability of reef slope and that there is a nonlinear relationship between the stability factor N _ s, the shear strength, and the thickness D _ s of the covered coral reef shell. In addition, the emergence of top-layer tensile cracks on the coral reefs reduces their stability, and horizontal wave loads has drastically reduced the coral reefs' stability.
Source link: https://doi.org/10.1007/s11802-022-4846-0
"Here we look at the literature for evidence of hybridization in coral reef organisms and find that hybridization is prevalent in well-studied populations, namely fish and hermatypic corals. " At least 183 fish and 81 scleractinian coral species have been reported to hybridise, with the highest abundance in angelfishes and psammocorid corals in angelfishes and psammocorid corals being reported to hybridize. These findings reveal that hybridization can influence fishes and corals in a variety of ways, and that the presence of hybridization is likely to be highly underestimated for coral reef taxa. The use of new genomic techniques will advance our understanding of the prevalence and evolutionary importance of hybridisation in coral reef organisms. In addition, these devices will help coral reef species adapt to increasing environmental change.
Source link: https://doi.org/10.1007/s00338-021-02193-9
"Corals influence microorganisms in the surrounding seawater, but coral-reef systems have not been properly addressed" explains author Richard Cohen. In the pristine coral reef flats and semi-closed inner lagoons of the pristine coral reef flats and semi-closed inner lagoons of Xisha Islands, South China's pristine coral reef flats and semi-closed inner lagoons. We obtained 40 seawater samples in outer coral reef flats and semi-closed inner lagoons. Based on qPCR results, the 16S rDNA copies were much higher in coral reef flats than in lagoons. In both samples, Alolata represented the majority of microeukaryotic populations of Microeukaryotic communities in Dinophyceae and Syndiniales, with Dinophyceae and Syndiniales well represented. Neither bacterial nor microeukaryotic community had a distinct layer or niche pattern, however, Haptophyta and Picozoa decreased with depth, and MAST-3 and Picozoa were enriched in lagoons, and neither bacterial nor microeukaryotic communities in lagoons were enriched in lagoons. "The paper demonstrated how seawater microbes could adapt to the unique coral-reef habitats. ".
Source link: https://doi.org/10.1007/s11802-022-5107-y
According to the authors, "Integrating bioenergetic models and global coral reef fish community surveys reveal that there are functional trade-offs, meaning that no one group can achieve any desired outcomes, and that dominant species underpin local functions, but geographically distinct. " Human presence is increasingly changing global ecosystems, often reducing biodiversity and disrupting the provision of essential ecosystem services to humanity. Coral reefs are declining worldwide as a result of climate change and intensive fishing, and although studies on coral reef ecosystem functioning have risen, most studies, such as fish biomass, rely on simplified proxies. Here we use global coral reef fish community surveys and bioenergetic data to identify five key ecosystem roles mediated by coral reef fishes. Our findings support the need for a nuanced, locally tailored approach to coral reef conservation that considers many biological functions beyond the effects of standing stock biomass. ".
Source link: https://doi.org/10.1038/s41559-022-01710-5
"The high species diversity in the tropical coral ecosystem shows that it is influenced by a complex network of processes that are not typical allopatric ecological speciation schemes, because geographical boundaries are limited in marine ecosystems. " Multiple molecular marker (u2013-based studies revealed that coral reef ecological nicheu2013-dependent adaptive divergent evolutionary selective pressure is acting on both coding and non-coding mitochondrial markers. We also found that Conus striolatus, a morphologically similar species to rocky shore C. catus, is the result of sympatric speciation through a remarkably diverse selection pressure exerted on each other in rocky intertidal ecosystems. Ecotypes of C. catus are in the way of parapatric speciation, and the only unit of biodiversity conservation should be the habitat separate from the species, according to the present study.
Source link: https://doi.org/10.1007/s13127-021-00533-9
"This research finds two common tropical sea cucumbers to find the causes that influence their habitat selection and seasonal changes, as well as providing information for the spatial planning of sea cucumbers reserves in the coral reef area. " In the north of Wuzhizhou Island, the study area is a concentrated distribution area of living coral reefs and sandy bottom. In G transect, the dissemination of H. edulis was highly correlated with the sand coverage and sand continuity, and was highly associated with live coral coverage in three transects, and it was strongly connected with live coral coverage. Small rock, sand, and a small coral reef are all typical habitats of S. chloronotus in dry season, while the H. edulis is S. SR, a dead coral wreck, and decomposing coral rubbles. The preferred habitats of S. chloronotus are changing to SCR and SR in rainy season, while the H. edulis is SCR, DCR, and sand. ".
Source link: https://doi.org/10.1007/s00343-021-1254-z
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