Catchment to sea connection: Impacts of terrestrial run-off on benthic ecosystems in American Samoa

Marine Pollution Bulletin, Journal Year: 2021, Volume and Issue: 169, P. 112530 - 112530

Published: June 1, 2021

Language: Английский

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A Comprehensive Review of Climatic Threats and Adaptation of Marine Biodiversity

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(2), P. 344 - 344

Published: Feb. 17, 2024

Oceans play a vital role in socioeconomic and environmental development by supporting activities such as tourism, recreation, food provision while providing important ecosystem services. However, concerns have been raised about the threat that climate change poses to functions of oceans. This study examines impacts, threats, adaptation strategies marine biodiversity. Using bibliometric secondary data analysis, this determines leads rising sea temperatures, heatwaves, acidification, increasing levels. These factors undermine significance ocean also identifies significant risks posed species diversity distribution, primarily through habitat degradation shifts ranges. Scholarly focus on these challenges has grown over time, focusing building resilience mitigate adverse impacts. critically evaluates various measures, including nature-based human-based solutions restoration, policy legislative frameworks, their potential protect ecosystems. It provides detailed discussions effectiveness protected areas (MPAs), mangrove coral reef range shifts. review emphasises indigenous knowledge systems community participation conservation efforts achieve holistic sustainable management. highlights need for enhanced international cooperation transdisciplinary approach address complex interplay between Additionally, suggests funding research gaps can be secured tourism revenue other mechanisms.

Language: Английский

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Coral reef benthic community changes in the Anthropocene: Biogeographic heterogeneity, overlooked configurations, and methodology

Global Change Biology, Journal Year: 2021, Volume and Issue: 28(6), P. 1956 - 1971

Published: Dec. 24, 2021

Non-random community changes are becoming more frequent in many ecosystems. In coral reefs, towards communities dominated by other than hard corals increasing frequency, with severe impacts on ecosystem functioning and provision of services. Although new research suggests that a variety alternative (i.e. not corals) exist, knowledge the global diversity reef benthic communities, especially those algae, remains scattered. this systematic review meta-analysis 523 articles, we analyse different reported to date discuss advantages limitations methods used study these changes. Furthermore, field cover data (1116 reefs from ReefCheck database) explore biogeographic latitudinal patterns dominant organisms. We found mismatch between literature focus coral-algal (over half studies analysed) observed natural patterns. identified strong patterns, largest most biodiverse regions (Western Central Indo-Pacific) presenting previously overlooked soft-coral-dominated as abundant community. Finally, potential biases associated overlook ecologically important cryptobenthic technological advances improving monitoring efforts. As inevitably swiftly change under changing ocean conditions, there is an urgent need better understand distribution, dynamics well ecological societal communities.

Language: Английский

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Naturally occurring fire coral clones demonstrate a genetic and environmental basis of microbiome composition

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Nov. 4, 2021

Abstract Coral microbiomes are critical to holobiont functioning, but much remains be understood about how prevailing environment and host genotype affect microbial communities in ecosystems. Resembling human identical twin studies, we examined bacterial community differences of naturally occurring fire coral clones within between contrasting reef habitats assess the relative contribution microbiome structure. Bacterial composition differed habitats, highlighting environment. Similarly, a lesser extent, varied across different genotypes denoting influence genotype. Predictions genomic function based on taxonomic profiles suggest that environmentally determined taxa supported functional restructuring metabolic network. In contrast, bacteria by seemed functionally redundant. Our study suggests flexibility as mechanism environmental adaptation with association partially dependent

Language: Английский

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A critical evaluation of benthic phase shift studies on coral reefs

Marine Environmental Research, Journal Year: 2022, Volume and Issue: 178, P. 105667 - 105667

Published: May 25, 2022

Language: Английский

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Macroalgal cover on coral reefs: Spatial and environmental predictors, and decadal trends in the Great Barrier Reef

PLoS ONE, Journal Year: 2023, Volume and Issue: 18(1), P. e0279699 - e0279699

Published: Jan. 20, 2023

Macroalgae are an important component of coral reef ecosystems. We identified spatial patterns, environmental drivers and long-term trends total cover upright fleshy calcareous inhabiting macroalgae in the Great Barrier Reef. The study comprised one-off surveys 1257 sites (latitude 11-24°S, coastal to offshore, 0-18 m depth), while temporal analysis was based on 26 years monitoring data from 93 reefs. Environmental predictors were obtained situ coupled hydrodynamic-biochemical model eReefs. dominated benthos (≥50% cover) at least one site 40.4% surveyed inshore Spatially, macroalgal increased steeply towards coast, with latitude away equator, shallow (≤3 m) depth. conditions associated dominance were: high tidal range, wave exposure irradiance, low aragonite saturation state, Secchi depth, alkalinity temperature. Evidence space competition between hard restricted sites. Temporally, mid-shelf reefs showed some fluctuations, but unlike corals they no systematic trends. Our extensive empirical may serve parameterize ecosystem models, refine condition indices for Pacific

Language: Английский

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Modeling the effects of selectively fishing key functional groups of herbivores on coral resilience

Ecosphere, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 1, 2024

Abstract Mounting evidence suggests that fishing can be a major driver of coral‐to‐macroalgae regime shifts on tropical reefs. In many small‐scale coral reef fisheries, fishers target herbivorous fishes, which weaken resilience via reduced herbivory macroalgae then outcompete corals. Previous models explored the effects harvesting herbivores revealed hysteresis in herbivory–benthic state relationship results bistability coral‐ and macroalgae‐dominated states over some levels pressure, has been supported by empirical evidence. However, past have not accounted for functional differences among or how fisher selectivity different herbivore groups may alter benthic dynamics resilience. Here, we use dynamic model links differential two key to outcome competitive between macroalgae. We show depends only level but also types targeted fishers. Selectively browsing are capable consuming mature (e.g., unicornfish) increases precariousness moving system close tipping point. By contrast, selectively grazing preventing from becoming established parrotfishes) increase catch yields substantially more before point is reached. this lower with increasing effort comes at cost range bistable; makes shift triggered disturbance difficult impractical reverse. Our suggest management strategies fisheries should consider harvested coupled influence light trade‐off recovery following large disturbances.

Language: Английский

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Submarine groundwater discharge drives both direct and indirect effects on organismal and community metabolism on coral reefs

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 292(2039)

Published: Jan. 1, 2025

Coral reefs experience numerous environmental gradients affecting organismal physiology and species biodiversity, which ultimately impact community metabolism. This study shows that submarine groundwater discharge (SGD), a common natural gradient in coastal ecosystems associated with decreasing temperatures, salinity pH increasing nutrients, has both direct indirect effects on coral reef metabolism by altering individual growth rates composition. Our data revealed SGD exposure hindered the of two algae, Halimeda opuntia Valonia fastigiata, 67 200%, respectively, one coral, Porites rus, 20%. Community metabolic showed altered production, respiration calcification between naturally high low areas mostly due to differences identity (i.e. composition), rather than effect physiology. Production were 1.5 6.5 times lower assemblages representing communities regardless environment. However, compounding resulted exhibiting highest under higher exposure. By demonstrating SGD's role composition metabolism, this research highlights critical need consider temperature) broader context ecosystem functions.

Language: Английский

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A systematic review and meta-analysis of the direct effects of nutrients on corals

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 856, P. 159093 - 159093

Published: Sept. 30, 2022

Language: Английский

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Biogeographic patterns of biosynthetic potential and specialized metabolites in marine sediments

The ISME Journal, Journal Year: 2023, Volume and Issue: 17(7), P. 976 - 983

Published: April 15, 2023

Abstract While the field of microbial biogeography has largely focused on contributions abiotic factors to community patterns, potential influence biotic interactions in structuring communities, such as those mediated by production specialized metabolites, remains unknown. Here, we examined relationship between structure and metabolism at local spatial scales marine sediment samples collected from Long-Term Ecological Research (LTER) site Moorea, French Polynesia. By employing a multi-omic approach characterize taxonomic, functional, metabolite composition within find that biogeographic patterns were driven scale processes (e.g., interactions) independent dispersal limitation. Specifically, observed high variation biosynthetic (based Bray-Curtis dissimilarity) samples, even 1 m2 plots, reflected uncharacterized chemical space associated with site-specific metabolomes. Ultimately, connecting metabolomes facilitated situ detection natural products revealed new insights into complex metabolic dynamics communities. Our study demonstrates integrate genes assessments dynamics.

Language: Английский

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