Marine heat waves drive bleaching and necrosis of temperate sponges

Current Biology, Год журнала: 2022, Номер 33(1), С. 158 - 163.e2

Опубликована: Дек. 2, 2022

Язык: Английский

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Subtidal benthic assemblages in a mediterranean bank along a depth gradient: Conservation perspectives of a vulnerable marine ecosystem

Ocean & Coastal Management, Год журнала: 2025, Номер 262, С. 107572 - 107572

Опубликована: Фев. 2, 2025

Язык: Английский

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The global significance of Scleractinian corals without photoendosymbiosis

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Май 3, 2024

Abstract Globally tropical Scleractinian corals have been a focal point for discussions on the impact of changing climate marine ecosystems and biodiversity. Research into corals, particularly role breakdown photoendosymbiosis in response to warming, has prolific recent decades. However, research their subtropical, temperate, cold- deep-water counterparts, whose number is dominated by without photoendosymbiosis, not as prolific. Approximately 50% (> 700 species) do maintain such, rely upon products photosynthesis homeostasis. Some species also variable partnerships with photendosymbionts depending life history ecological niche. Here we undertake systematic map literature without, or variable, photoendosymbiosis. In doing so identify 482 publications spanning 5 mapping effort, find sporadic over time, predominately focusing limited species, greater effort directed towards species. We only 141 studied, approximately 30% total identified toward single Desmophyllum pertusum , highlighting significant knowledge gaps diversity. similar limitations studied locations, 78 from global data, which few represent most outputs. inconsistencies terminology used describe Scleractinia likely contributing difficulties accounting contribution ecosystems. propose that requires re-evaluation allow further assessment literature, ensure it’s consistent changes implemented photoendosymbiotic corals. Finally, 20 years ago are still present aphotoendosymbiotic show data deficiencies remain regarding function, biodiversity impacts anthropogenic stressors.

Язык: Английский

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Marine heatwave‐driven mass mortality and microbial community reorganisation in an ecologically important temperate sponge

Global Change Biology, Год журнала: 2024, Номер 30(8)

Опубликована: Авг. 1, 2024

Marine heatwaves (MHWs) are increasing in frequency, duration and intensity, disrupting global marine ecosystems. While most reported impacts have been tropical areas, New Zealand experienced its strongest longest MHW 2022, profoundly affecting sponges. Sponges vital to rocky benthic communities, with their abundance influencing ecosystem functioning. This study examines the impact of this on photosynthetic sponge Cymbastella lamellata Fiordland, Zealand. We describe extent, physiological responses, mortality, microbial community changes ecological C. lamellata. The Fiordland reached a maximum temperature 4.4°C above average, lasting for 259 days. Bleaching occurred >90% population. population size exceeded 66 million from 5 25 m, making largest bleaching event kind ever recorded. identified symbiont as diatom, bleached sponges had reduced efficiency. Post-MHW surveys 2023 found that over 50% at sampling sites died but remaining mostly recovered earlier bleaching. Using simulated experiment, we stress was driver necrosis rather than bleaching, despite only rarely being observed field (<2% sponges). suggests may not be cause mortality directly. also shift surviving sponges, which propose represents microbial-mediated adaptive response MHWs. key contributors dissolved organic carbon water column, loss likely impacting function. demonstrate potential MHWs disrupt phyla temperate regions, highlighting how susceptible globally might

Язык: Английский

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Marine heatwave conditions drive carryover effects in a temperate sponge microbiome and developmental performance

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2023, Номер 290(2000)

Опубликована: Июнь 7, 2023

Marine heatwaves are increasingly subjecting organisms to unprecedented stressful conditions, but the biological consequences of these events still poorly understood. Here we experimentally tested presence carryover effects heatwave conditions on larval microbiome, settlers growth rate and metamorphosis duration temperate sponge

Язык: Английский

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High Megabenthic Complexity and Vulnerability of a Mesophotic Rocky Shoal Support Its Inclusion in a Mediterranean MPA

Diversity, Год журнала: 2023, Номер 15(8), С. 933 - 933

Опубликована: Авг. 16, 2023

The deep shoal of Punta del Faro (Ligurian Sea, Mediterranean Sea) is a mesophotic rocky elevation hosting complex animal forests threatened by fishing activities. To identify appropriate conservation measures and set reference example for similar cases, we present detailed characterization its megabenthic communities quantification the pressure. results highlight high natural value area, presenting biodiversity (111 demersal species) diverse types forest, predominantly dominated cnidarians. tridimensional seascape among most in eastern Ligurian but long-term evaluation environmental status suggested consistent affects due to abundance lost gear (0.65 items m−2) directly entangled with structuring artisanal recreational pressure are currently moderate. However, use bottom-contact causes significant modifications seafloor’s integrity. This study emphasizes vulnerability shoal, highlighting importance protection through inclusion Portofino MPA, whose external perimeter 200 m from area. A critical discussion advantages disadvantages provided map possible extension MPA boundaries.

Язык: Английский

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Environmental DNA reveals temporal variation in mesophotic reefs of the Humboldt upwelling ecosystems of central Chile: Toward a baseline for biodiversity monitoring of unexplored marine habitats

Ecology and Evolution, Год журнала: 2024, Номер 14(2)

Опубликована: Фев. 1, 2024

Temperate mesophotic reef ecosystems (TMREs) are among the least known marine habitats. Information on their diversity and ecology is geographically temporally scarce, especially in highly productive large upwelling ecosystems. Lack of information remains an obstacle to understanding importance TMREs as habitats, biodiversity reservoirs connections with better-studied shallow reefs. Here, we use environmental DNA (eDNA) from water samples characterize community composition central Chilean coast, generating first baseline for monitoring these We analyzed two depths (30 60 m) over four seasons (spring, summer, autumn, winter) at locations approximately 16 km apart. used a panel three metabarcodes, that target all eukaryotes (18S rRNA mitochondrial COI) one specifically targeting fishes (16S rRNA). All panels combined encompassed eDNA assigned 42 phyla, 90 classes, 237 orders, 402 families. The highest family richness was found phyla Arthropoda, Bacillariophyta, Chordata. Overall, similar between but decreased during pattern consistent both locations. Our results indicate structure (composition) communities varied predominantly seasons. further better-resolved fish assemblage compared other visual methods same depths. recovered 19 genera fish, six have also been observed towed underwater videos, while 13 were unique eDNA. discuss potential drivers seasonal differences richness. suggest can provide valuable insights TMRE highlight necessity completing reference databases available this region.

Язык: Английский

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Mesophotic zone as buffer for biodiversity protection: A promising opportunity to enhance MPA effectiveness

Marine Environmental Research, Год журнала: 2024, Номер 201, С. 106676 - 106676

Опубликована: Авг. 13, 2024

Coastal areas conservation strategies often left deeper habitats, such as mesophotic ones, unprotected and exposed to anthropogenic activities. In this context, an approach for including the zone inside protection plans is proposed, considering 27 Italian Marine Protected Areas (MPAs) a model. MPAs were classified their bathymetries, exposure marine heat waves (MHWs), mass mortality events (MMEs) and, using local ecological knowledge (LEK) approach, estimated resilience of certain sessile species after MMEs. Only 8 contained considerable areas, with stronger MHWs mainly occurring in shallower MPAs, MMEs mostly affecting coralligenous assemblages. Even only 10% response rate, LEK provided useful information on species, allowing us suggest that presence nearby can help habitats facing climate change, thus making "deep refugia" hypothesis, usually related tropical applicable also Mediterranean Sea.

Язык: Английский

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The Hidden Diversity of Temperate Mesophotic Ecosystems from Central Chile (Southeastern Pacific Ocean) Assessed through Towed Underwater Videos

Diversity, Год журнала: 2023, Номер 15(3), С. 360 - 360

Опубликована: Март 2, 2023

The largely unexplored diversity in temperate mesophotic ecosystems (TME, ~30–150 m depth) has attracted much attention over the past years. However, number of studies and knowledge TME ecology remains limited geographically restricted. absence information on how assemblages vary across environmental gradients with depth for most regions also limits our capacity to delimit conservation areas devise management plans effectively. This study focuses from central Chile describes distribution reef fishes benthic invertebrates algae first time. Through analysis towed underwater video surveys between 4.7–95.5 multiple sites, we show that total fish density richness decrease but increase local topographic complexity. depth-related varies among species trophic groups, it reverses case Sebastes oculatus, which increases depth. Sponges gorgonians dominate below 20 depth, brachiopods anemones 40 60 m, respectively. Some these form animal forests which, some extent, replace shallow-water kelp as structural habitat providers. Nevertheless, community do not a clear structure or studied sites. We highlight urgency intensify expand quantitative characterization communities, through this other methodologies, better define ecological patterns advance towards TME, including Souteastern Pacific region.

Язык: Английский

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Plumbing the depths with environmental DNA (eDNA): Metabarcoding reveals biodiversity zonation at 45–60 m on mesophotic coral reefs

Molecular Ecology, Год журнала: 2023, Номер 32(20), С. 5590 - 5608

Опубликована: Сен. 20, 2023

Mesophotic coral ecosystems (MCEs) are tropical reefs found at depths of ~30-150 m, below the region most heavily impacted by heat stress and other disturbances. Hence, MCEs may serve as potential refugia for threatened shallow reefs, but they also harbour depth-endemic fauna distinct from reefs. Previous studies have characterized biodiversity patterns along depth gradients, focussed primarily on conspicuous taxa (fishes, corals, etc.). Environmental DNA (eDNA) metabarcoding offers a more holistic approach to assess across tree life. Here, we use three assays targeting fishes (16S rRNA), eukaryotes (18S rDNA) metazoans (COI) change surface ~90 m 15-m intervals sites within Hawaiian Archipelago. We observed significant community differences between zones, with zonation centred 45-60 metazoans, not fishes. This finding be attributable higher mobility reef fishes, although methodological limitations likely contributing factor. The possibility is excluded invertebrate communities >45 distinct, indicating limited connectivity majority fauna. study provides new surveying MCEs, revealing in much broader context than limited-taxon that comprise bulk our present knowledge.

Язык: Английский

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