An extensive reef system at the Amazon River mouth

Science Advances, Journal Year: 2016, Volume and Issue: 2(4)

Published: April 1, 2016

A novel Amazonian reef biome was discovered, encompassing large rhodolith and sponge beds under low light, oxygen, high POC.

Language: Английский

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Brazilian coral reefs in a period of global change: A synthesis

Brazilian Journal of Oceanography, Journal Year: 2016, Volume and Issue: 64(spe2), P. 97 - 116

Published: Jan. 1, 2016

Abstract Brazilian coral reefs form structures significantly different from the well-known reef models, as follows: (i) they have a growth of mushroom-shaped pinnacles called "chapeirões", (ii) are built by low diversity fauna rich in endemic species, most them relic forms dating back to Tertiary, and (iii) nearshore bank surrounded siliciclastic sediments. The distributed following four major sectors along coast: northern, northeastern eastern regions, oceanic islands, but certain isolated species can be found warmer waters embayments southern region. There types reefs, fringing "chapeirões" an atoll present coast. Corals, milleporids coralline algae build rigid frame reefs. areas which occur correspond regions nearby urban centers experiencing accelerated growth, tourism development is rapidly increasing. human effects on ecosystem mostly associated with increased sedimentation due removal Atlantic rainforest discharge industrial effluents. warming that had previously affected several high intensity bleaching not shown, time 2010 event, any episodes mass mortality

Language: Английский

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No coral recovery three years after a major bleaching event in reefs in the Southwestern Atlantic refugium

Marine Biology, Journal Year: 2024, Volume and Issue: 171(5)

Published: April 18, 2024

Language: Английский

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Perspectives on the Great Amazon Reef: Extension, Biodiversity, and Threats

Frontiers in Marine Science, Journal Year: 2018, Volume and Issue: 5

Published: April 23, 2018

Here we provide a broad overview of the Great Amazon Reef System (GARS) based on first-ever video surveys region. This footage supports four major hypotheses: 1) GARS area may be six times larger than previously suggested (up to 56,000 km2); 2) extend deeper 220 m); 3) is composed greater complexity and diversity habitats recognized (e.g. reef platforms, walls, rhodolith beds, sponge bottoms); 4) represents useful system test whether deep corridor connects Caribbean Sea Southwest Atlantic Ocean. We also call attention urgent need adopt precautionary conservation measures protect region in face increasing threats from extractive oil gas practices. With less 5% potential surveyed so far, more research will required inform systematic planning approach determine how best establish network marine protected areas. Such reconcile activities with effective biodiversity GARS.

Language: Английский

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Large-scale patterns of benthic marine communities in the Brazilian Province

PLoS ONE, Journal Year: 2018, Volume and Issue: 13(6), P. e0198452 - e0198452

Published: June 8, 2018

As marine ecosystems are influenced by global and regional processes, standardized information on community structure has become crucial for assessing broad-scale responses to natural anthropogenic disturbances. Extensive biogeographic provinces, such as the Brazilian Province in southwest Atlantic, present numerous theoretical methodological challenges understanding patterns a macroecological scale. In particular, is composed of complex system heterogeneous reefs few offshore islands, with contrasting histories geophysical-chemical environments. Despite large extent (almost 8,000 kilometers), most studies shallow benthic communities qualitative surveys and/or have been geographically restricted. We quantified reef habitats from 0° 27°S latitude using standard photographic quadrat technique. Percent cover data indicated that were dominated algal turfs frondose macroalgae, low percent reef-building corals. Community composition differed significantly among localities, mostly because their macroalgal abundance, despite type or geographic region, no evident latitudinal pattern. Benthic diversity was lower tropics, contrary general gradient Richness peaked at mid-latitudes, between 20°S 23°S, where it ~3.5-fold higher than localities lowest richness. This study provides first large-scale description along southwestern providing baseline comparisons evaluation future impacts. Moreover, new richness distribution will contribute conservation planning efforts, management strategies spatial prioritization creation protected areas.

Language: Английский

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South Atlantic Coral Reefs Are Major Global Warming Refugia and Less Susceptible to Bleaching

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: June 25, 2020

Mass coral bleaching has increased in intensity and frequency severely impacted shallow tropical reefs worldwide. Although extensive investigation been conducted on the resistance resilience of Indo-Pacific Caribbean, unique South Atlantic remain largely unassessed. Here we compiled primary literature data for from three biogeographical regions: Indo-Pacific, Caribbean performed comparative analyses to investigate whether latter may be more resistant bleaching. Our findings show that corals display critical features make them less susceptible mass bleaching: (i) deeper bathymetric distribution, as species have a mean maximum depth occurrence 70 m; (ii) higher tolerance turbidity, nearly 60% are found turbid conditions; (iii) nutrient enrichment, nitrate concentration is naturally elevated; (iv) morphological resistance, massive growth forms dominant comprise two thirds species; (v) flexible symbiotic associations, 75% symbiont phylotypes generalists. Such were associated with fewer episodes mortality Atlantic, approximately than 50% Caribbean. In addition, no global events reported which suffered considerably These results several remarkable withstanding thermal stress. Together historic experience lower heat stress, our explain why climate change impacts this region intense. Given large extension latitudinal distribution communities, recognized major refugium likely resist effectively reefs.

Language: Английский

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A modelling approach to assess the impact of land mining on marine biodiversity: Assessment in coastal catchments experiencing catastrophic events (SW Brazil)

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 659, P. 828 - 840

Published: Dec. 18, 2018

Language: Английский

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Sustained mass coral bleaching (2016–2017) in Brazilian turbid-zone reefs: taxonomic, cross-shelf and habitat-related trends

Coral Reefs, Journal Year: 2019, Volume and Issue: 38(4), P. 801 - 813

Published: March 15, 2019

Language: Английский

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Complexities of reef fisheries in Brazil: a retrospective and functional approach

Reviews in Fish Biology and Fisheries, Journal Year: 2024, Volume and Issue: 34(1), P. 511 - 538

Published: Jan. 2, 2024

Language: Английский

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The Thermal Stress History of South Atlantic Reefs Reveals Increasing Intensity, Duration, Frequency, and Likely Undocumented Bleaching Episodes

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

The primary consequence of global warming for reefs is coral bleaching, often leading to extensive mortality. Although bleaching well-documented globally, the thermal stress and experienced by unique South Atlantic remain largely unknown due insufficient monitoring on both spatial temporal scales. Therefore, this work aimed reconstruct past episodes across reefs, assessed whether are becoming more intense, longer-lasting, frequent. We retrieved daily 5 km-resolution Degree Heating Week (DHW) data from U.S. National Oceanic Atmospheric Administration Coral Reef Watch server 33 reef sites spanning last 40 years. For each episode, we intensity (maximum DHW value), duration (number continuous days under stress), frequency between episodes). Generalized linear models were fitted intensity, duration, evaluate influence latitude time x region interaction as predictors. recorded multiple episodes, increasing 2010 onwards, ranging 10 1985-89 75 2020-24. Intensity increased over entire Atlantic. Frequency also Southwestern coast oceanic islands, but not Africa. Episodes at higher latitudes prolonged, validity history reconstruction was groundtruthed using information Abrolhos Bank, only consistently monitored site in Atlantic-DHW accurately matched observed site. With this, our dataset shows that likely occurred Atlantic, went undocumented field. currently available underestimates extent occurring area, which experiencing increases stress.

Language: Английский

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