Marked Variability in Distance‐Decay Patterns Suggests Contrasting Dispersal Ability in Abyssal Taxa

Global Ecology and Biogeography, Год журнала: 2025, Номер 34(1)

Опубликована: Янв. 1, 2025

ABSTRACT Aim We assess the role of spatial distance and depth difference in shaping beta diversity patterns across abyssal seascape regions. measured decrease faunistic similarity northeast Pacific seafloor, to test whether species turnover rates differ between deep shallow‐abyssal biogeographical provinces these vary functionally or taxonomically different biotic groups. Location Abyssal NE Ocean. Time Period Present. Major Taxa Studied Benthic Invertebrates (13 Phyla). Methods examined relationship compositional (𝛽 sim ) distance, distance‐decay, benthic megafauna communities (animals > 10 mm) based on seabed imagery data (> 36,000 specimens 402 species) collected 28 locations spanning a total 4000 km. By comparing statistical parameters (intercept slope) decay curves, we investigated distance‐decay (i) above below carbonate compensation (~4400 m at N Pacific), (ii) among taxa with contrasting life‐habits dominant phyla. Results found steeper 4400 variations Turnover was higher for facultatively growing hard‐substratum patches (polymetallic nodules) than sediment‐dwelling swimming organisms. Cnidaria Porifera, respectively, depicted most least evident decays community similarity. Main Conclusions demonstrate utility combining imaging modelling capture macroecological poorly explored deep‐sea ecosystems. Our results suggest that chemical boundaries associated are very relevant niche‐sorting mechanism driving large‐scale beta‐diversity an association dispersal limitation communities. These findings have important implications biodiversity conservation plans ocean, amid need protect vast ecosystems from globally rising human threats.

Язык: Английский

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BBNJ Agreement: Considerations for Scientists and Commercial End Users of MGR at Research, Development and Commercialization Stages

Sustainable development goals series, Год журнала: 2025, Номер unknown, С. 283 - 315

Опубликована: Янв. 1, 2025

Язык: Английский

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How little we’ve seen: A visual coverage estimate of the deep seafloor

Science Advances, Год журнала: 2025, Номер 11(19)

Опубликована: Май 7, 2025

Despite the importance of visual observation in ocean, we have imaged a minuscule fraction deep seafloor. Sixty-six percent entire planet is ocean (≥200 m), and our data show that visually observed less than 0.001%, total area approximately tenth size Belgium. Data gathered from 44,000 deep-sea dives indicate also seen an incredibly biased sample. Sixty-five all situ seafloor observations dataset were within 200 nm only three countries: United States, Japan, New Zealand. Ninety-seven compiled been conducted by just five Zealand, France, Germany. This small sample problematic when attempting to characterize, understand, manage global ocean.

Язык: Английский

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Carbonate compensation depth drives abyssal biogeography in the northeast Pacific

Nature Ecology & Evolution, Год журнала: 2023, Номер 7(9), С. 1388 - 1397

Опубликована: Июль 24, 2023

Abstract Abyssal seafloor communities cover more than 60% of Earth’s surface. Despite their great size, abyssal plains extend across modest environmental gradients compared to other marine ecosystems. However, little is known about the patterns and processes regulating biodiversity or potentially delimiting biogeographical boundaries at regional scales in abyss. Improved macroecological understanding remote environments urgent as threats widespread anthropogenic disturbance grow deep ocean. Here, we use a new, basin-scale dataset show existence clear zonation 5,000 km span Clarion–Clipperton Zone (northeast Pacific), an area targeted for deep-sea mining. We found two pronounced biogeographic provinces, shallow-abyssal, separated by transition zone between 4,300 4,800 m depth. Surprisingly, species richness was maintained this boundary phylum-level taxonomic replacements. These transitions are probably related calcium carbonate saturation taxa dependent on structures, such shelled molluscs, appear restricted shallower province. Our results suggest geochemical climatic forcing distributions populations over large spatial provide potential paradigm macroecology, opening new basis regional-scale research conservation strategies largest biome.

Язык: Английский

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Deep learning–assisted biodiversity assessment in deep-sea benthic megafauna communities: a case study in the context of polymetallic nodule mining

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Апрель 17, 2024

Introduction Technological developments have facilitated the collection of large amounts imagery from isolated deep-sea ecosystems such as abyssal nodule fields. Application a monitoring tool in these areas interest for exploitation is extremely valuable. However, order to collect comprehensive number species observations, thousands images need be analysed, especially if high diversity combined with low abundances case As visual interpretation volumes and manual extraction quantitative information time-consuming error-prone, computational detection tools may play key role lessen this burden. Yet, there still no established workflow efficient marine image analysis using deep learning–based computer vision systems task fauna classification. Methods In study, dataset 2100 polymetallic fields eastern Clarion-Clipperton Fracture zone SO268 expedition (2019) was selected investigate potential machine learning–assisted annotation workflows. The Machine Learning Assisted Image Annotation method (MAIA), provided by BIIGLE system, applied different set-ups trained manually annotated data. results computed were compared those obtained biologists regarding accuracy (i.e. recall precision) time. Results Our show that MAIA can general object species) satisfactory (90.1% 13.4% precision), when considered one intermediate step workflow. We also investigated performance training data, tuned individual morphological groups impact sediment coverage Discussion conclude that: a) steps must taken enable scientists access more data CCZ improve system’s b) combination posteriori filtering has higher efficiency than fully analyses.

Язык: Английский

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Self-governance at depth: The international seabed authority and verification culture of the deep-sea mining industry

Resources Policy, Год журнала: 2023, Номер 89, С. 104577 - 104577

Опубликована: Дек. 29, 2023

Язык: Английский

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Biodiversity of the Clarion-Clipperton Fracture Zone: a worm perspective

Marine Biodiversity, Год журнала: 2024, Номер 54(1)

Опубликована: Янв. 11, 2024

Язык: Английский

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Complex deep-sea expeditions try to size up seabed mining impacts

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(15)

Опубликована: Апрель 3, 2024

Structures from the Stone Age can provide unique insights into Late Glacial and Mesolithic cultures around Baltic Sea. Such structures, however, usually did not survive within densely populated Central European subcontinent. Here, we ...The Sea basins, some of which only submerged in mid-Holocene, preserve structures that on land. Yet, discovery these features is challenging requires cross-disciplinary approaches between archeology ...

Язык: Английский

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North Atlantic deep-sea benthic biodiversity unveiled through sponge natural sampler DNA

Communications Biology, Год журнала: 2024, Номер 7(1)

Опубликована: Авг. 19, 2024

The deep-sea remains the biggest challenge to biodiversity exploration, and anthropogenic disturbances extend well into this realm, calling for urgent management strategies. One of most diverse, productive, vulnerable ecosystems in deep sea are sponge grounds. Currently, environmental DNA (eDNA) metabarcoding is revolutionising field monitoring, yet complex benthic remain challenging assess even with these novel technologies. Here, we evaluate effectiveness whole-community characterise metazoan diversity grounds across North Atlantic by leveraging natural eDNA sampling properties sponges themselves. We sampled 97 tissues from four species North-Atlantic biogeographic regions screened them using universal COI barcode region. recovered unprecedented levels taxonomic per unit effort, especially phyla Chordata, Cnidaria, Echinodermata Porifera, at least 406 found our study area. These assemblages identify strong spatial patterns relation both latitude depth, detect emblematic currently employed as indicators habitats. remarkable performance approach different sponges, whole animal kingdom, illustrates vast potential samplers high-resolution biomonitoring solutions highly diverse ecosystems.

Язык: Английский

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The conservation‐extraction nexus in ocean areas beyond National Jurisdiction: Tension or co‐constitution?

Journal of Agrarian Change, Год журнала: 2024, Номер unknown

Опубликована: Окт. 17, 2024

Abstract Recent years have seen a sharp uptick in efforts to expedite resource extraction in, and expand biodiversity conservation to, Areas Beyond National Jurisdiction (ABNJ), the ~70% of oceans outside state space. In this symposium piece, we explore co‐constitution parallel acceleration economic exploitation that is unfolding ways unique high seas, but consistent with global patterns wherein coupling encloses space for capitalist value extraction. These coupled tendencies are part expanded ocean regulation and, ABNJ, they form state‐capital advancement into one remaining world frontiers. We extraction‐conservation nexus two contemporary ABNJ negotiations: 1) Implementing Agreement under United Nations Convention on Law Sea (UNCLOS) Conservation Sustainable Use Marine Biological Diversity 2) International Seabed Authority's development an regime deep‐seabed mining Area. Our findings build insights from agrarian political economy ecology establish – rather than incommensurability extractive activities terrestrial spaces draw out arenas ecologically complex, political‐economic grey zone uninhabited (by humans), non‐state planet. This work contributes placing seas emergent blue within critical scholarship describes explores conservation‐extraction its consequences.

Язык: Английский

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