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"In the Great Barrier Reef lagoon and the Coral Sea, the bio-optical properties of coral reef waters were investigated across coral reef ecosystems that were not affected by land-based run-off. " The aim was to determine whether the absorption properties, the concentration-specific absorption characteristics, and the phytoplankton and non-algal pigmented particle absorption concentrations varied from the ocean waters flushing onto the reef to those waters off the reef or flopping off the reef at low tide. The chl a concentration values increased by 7fold and NAP concentrations increased by 29 percent in the reef samples, with average 2 to 3 times lower than those of the oceans, while the NAP values were marginally higher on the reefs. The spectral absorption of chl a was up to 3-fold lower on the reef waters, but the CDOM's absorption was up to 2-fold higher, and the NAP absorption was 1. 6-fold higher on the reef waters, with a spectral absorption of chl a Due to the reef's unpredictable appearance and size, the Lihou Reef measurements were more ambiguous between the reef waters and ocean waters. The difference in the biological characteristics of reef waters and nearby ocean waters has significant implications for the estimation of sun absorption along the water column, the UV penetration depth, temperature distributions, and coral reef ecosystems' nutrient and carbon fluxes. When estimating benthic cover, Earth observation algorithms require proper parameterization for the water column effects, so the actual optical properties must be used. ".
Source link: https://doi.org/10.3390/rs14122892
"Abstract": Warm-water coral reefs in the United States are limited to tropical-to-subtropical latitudes. We explore the role of climate and palaeogeography in shaping coral reef distribution over geological timescales. To do so, we integrate habitat suitability modeling, Earth System modeling, and the 247-year geological record of scleractinian coral reefs. During a U2018cold-snapu2019 period, the oldest Cretaceous may have been an exception, with reduced shallow sea snapu2019 interval. Although our findings indicate that global warming may lead to long-range poleward range expansions, coral reef ecosystems are unlikely to keep pace with the rapid rate of anthropogenic climate change. ".
Source link: https://doi.org/10.1038/s41467-022-30793-8
"Current coral reef surveys around the Perhentian Islands do not specifically monitor sea anemone populations, nor do they investigate how sea anemone abundance correlates to live coral reef cover on reef sites. " The current research was designed to investigate sea anemone abundance and distribution patterns around the Perhentian Islands, as well as finding significant correlations between sea anemone abundance and live coral cover, as well as determining the presence of strong associations between sea anemone abundance and distribution patterns. In addition, live coral cover estimates were collected and tested for correlations between coral and sea anemone abundances. The new report presents the first population survey of hosting sea anemone assemblages around the Perhentian Islands, as well as a preliminary investigation into the links between the reefs' host sea anemone presence and live coral cover.
Source link: https://doi.org/10.1101/2021.01.22.427756
"Artificial reefs have demonstrated their ability as a way to prevent localized habitat destruction and biodiversity loss on degraded coral reefs. " The wellbeing of coral reefs in Indonesia and their associated faunal populations has declined in recent decades, and community-managed non-government groups have begun using artificial reefs to restore local degraded reef habitats. Fish assemblages on two artificial reefs of differing ages were found in north Bali's three-month period, in comparison to two nearby natural habitats: degraded sand flats and relatively healthy coral reefs. This is one of the few studies in Indonesia that highlight the promise of artificial reef habitat improvement, as well as the fact that these structures can provide ecologically equivalent mobile faunal populations to a natural reef on a localized basis.
Source link: https://doi.org/10.3934/geosci.2022018
Darwin drew on findings from the Keeling Islands in the Indian Ocean to support his assertion that ocean floor subsidence can account for coral atolls' formation. " Darwin would receive the Royal Society's royal medal in 1853 for this and his work on barnacles. In this series, the other research in the trilogy, Geological Observations on the Volcanic Islands, and Geological Observations on South America, are both reissued.
Source link: https://doi.org/10.1017/cbo9781107325098
"Currently, there is scant evidence describing benthic amphipod species in the Marine Protected Area Tuxpan, Mexico's southwestern Gulf of Mexico's Coral Reef, a coral reef containing benthic amphipod species. " This report summarizes the first study of these benthic amphipods associated with many living or hard bottom substrates found in July 2014, with 1,386 individuals collected at depths of 0. 5 mm, 19 families, and 3 suborders. In the Tuxpan u2014Lobos coral reef system, nineteen species were identified as dominant. "Txpan2014Lobos Coral Reef system has the third highest amphipod species diversity in a coral reef ecosystem, after Alacranes and Sisal reefs, both located in the southern GoM. ".
Source link: https://doi.org/10.18785/gcr.3301.04
Coralline algae algae, coralline algae, are one of the most common groups of highly prone calcified benthic organisms to ocean acidification, according to the "Abstract" section of ocean acidification. We review the similarity in taxonomic groups, spatial distribution, and seawater acidification vulnerability of these algae species to seawater acidification here.
Source link: https://doi.org/10.1038/s41598-022-13731-y
"The extreme rise in temperatures has a major effect on sea surface temperature and coral reef ecosystems. " Coral bleaching has caused damage to coral reefs, which is characterized by decreased live coral cover in the United Kingdom. Observations on coral reef restoration have been carried out at 13 sites in Central Tapanuli waters. Using the UVC technique, the coral fish density was determined. Live coral cover has increased by around 5% since 2018 observations. Despite the fact that coral composition changes and mainly the number of corals decreases, after five years, the number of corals is on the increase.
Source link: https://doi.org/10.1088/1755-1315/1033/1/012044
"As many as 1 billion people around the world depend on coral reefs for food, coastal defense, cultural practices, and income [1, 2]. Corals are starving as a result of their primary source of food, the photosynthetic algae that live within their tissue, as rising ocean temperatures cause corals to starve. Ocean warming has been impacting coral reefs around the globe for decades, with the new 2014-2016 heat stress event killing more than 75% of the world's corals [3, 4]. We also have identified organizational and legislative ineffectively preserving coral habitats. From their immense economic and ecological value, coral reefs' increase and urgency are evident. However, the new course of ocean temperatures is still requires global measures to reduce greenhouse gas emissions in order to adequately safeguard coral reefs' future. The United States should lead the world leader in combating climate change and protecting one of the planet's most important ecosystems. ".
Source link: https://doi.org/10.38105/spr.7vn798jnsk
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