Upper Bathyal Pacific Ocean biogeographic provinces from octocoral distributions

Summers, Natalie; Watling, Les

doi:10.1016/j.pocean.2020.102509

Cited by 9 publications

(9 citation statements)

References 28 publications

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“…In general, the distribution of deep-sea bottom fauna follows the dynamics of water masses, productivity at the surface of the ocean, and climatic zonation ( Vinogradova, 1979 ; Zezina, 1997 ; Carney, 2005 ; McClain & Hardy, 2010 ; McClain & Schlacher, 2015 ). However, in some areas the benthic distribution patterns have shown to be more related to horizontal (latitudinal), rather than vertical limits (water column) ( De Leo, Bernardino & Sumida, 2020 ; Summers & Watling, 2021 ), and our results appear support those regional processes.…”

Section: Discussionsupporting

confidence: 77%

“…However, unlike zoogeographic studies, these provinces remained hypothetical and remain to be tested in many regions with species distribution data. More recently, Summers & Watling (2021) tested the biogeographic scheme for the upper bathyal depths (200–1,000 m) across the Pacific Ocean using octocoral distributions with the MEOW biogeographic scheme and Ecological Marine Units (EMUs) ( Sayre et al, 2017 ), and suggested that shifts from the global biogeographical predictions occur due to regional changes in the geographical species distribution. Although depth, temperature and water masses play important roles, biogeographic depth boundaries can vary by region; which was also previously observed in the North Atlantic ( Braga-Henriques et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

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Benthic biogeographic patterns on the deep Brazilian margin

Yepes-Gaurisas¹,

Bernardino²

2023

PeerJ

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The Brazilian continental margin (BCM) extends from the Tropical to the Subtropical Atlantic Ocean, with much of its seafloor within deep waters, supporting rich geomorphological features and under wide productivity gradients. Deep-sea biogeographic boundaries on the BCM have been limited to studies that used water mass and salinity properties of deep-water masses, partly as a result of historical under sampling and a lack of consolidation of available biological and ecological datasets. The aim of this study was to consolidate benthic assemblage datasets and test current oceanographic biogeographical deep-sea boundaries (200–5,000 m) using available faunal distributions. We retrieved over 4,000 benthic data records from open-access databases and used cluster analysis to examine assemblage distributions against the deep-sea biogeographical classification scheme from Watling et al. (2013). Starting from the assumption that vertical and horizontal distribution patterns can vary regionally, we test other schemes incorporating latitudinal and water masses stratification within the Brazilian margin. As expected, the classification scheme based on benthic biodiversity is in overall agreement with the general boundaries proposed by Watling et al. (2013). However, our analysis allowed much refinement in the former boundaries, and here we propose the use of two biogeographic realms, two provinces and seven bathyal ecoregions (200–3,500 m), and three abyssal provinces (>3,500 m) along the BCM. The main driver for these units seems to be latitudinal gradients as well as water mass characteristics such as temperature. Our study provides a significant improvement of benthic biogeographic ranges along the Brazilian continental margin allowing a more detailed recognition of its biodiversity and ecological value, and also supports the needed spatial management for industrial activities occurring in its deep waters.

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Section: Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Benthic biogeographic patterns on the deep Brazilian margin

Yepes-Gaurisas¹,

Bernardino²

2023

PeerJ

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“…Benthic regionalizations of the lower bathyal, abyssal, and hadal zones of the ocean using both environmental data and expert knowledge were proposed by Watling et al (2013) and recently modified based on anthozoan distributions (Watling and Lapointe 2022). A first attempt to examine the upper bathyal distributions was made in the Pacific using octocoral distributional data (Summers and Watling 2021). While these are important advances, none of the regionalizations cover entirely the ocean seafloor nor are they complementary to or interoperable with each other.…”

Section: Main Text Background and Summarymentioning

confidence: 99%

“…We hope it will support broader marine research and stakeholder communities to account for the three dimensions of marine benthic habitats more comprehensively. For instance, it can advance the knowledge of benthic macroecological patterns, and expand on existing taxon-specific refinements (Kulbicki et al 2013;O'Hara, Rowden, and Bax 2011;O'Hara et al 2019;Summers and Watling 2021;Woolley et al 2020). It can further coarsely inform the representation of important benthic regions in marine protected areas, with important implications for marine benthic conservation practice and policy (Rice et al 2011).…”

Section: Main Text Background and Summarymentioning

confidence: 99%

A global biogeographic regionalization of the benthic ocean

Maureaud¹,

Reygondeau²,

Ingenloff³

et al. 2023

Preprint

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“…Their ecoregions and provinces are defined as cohesive units applicable to the broad life history processes of most mobile, sedentary, and dispersive species (e.g., cnidarians of the class Hydrozoa; Spalding et al 2007). As such, they are widely used for biodiversity and biogeographic studies wordwide (Poore and Bruce 2012;Vilar et al 2019;Palomares et al 2020;Summers and Watling 2021).…”

Section: Introductionmentioning

confidence: 99%

Biodiversity and biogeography of hydroids across marine ecoregions and provinces of southern South America and Antarctica

et al. 2021

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To better understand the biodiversity-biogeographic polar connections between southern South America and Antarctica (SSA & A), we used benthic communities of hydroids as a model to investigate marine assemblages by evaluating classic spatial divisions at different geographical resolutions. Using a georeferenced dataset of 249 species and multivariate analyses, we investigated species' distribution, composition and biogeographic connectivity, and defined assemblages of ecoregions and provinces for the area. Hotspots of rich biodiversity at risk of depletion were defined. Analyses of ecoregions have a more stratified biogeographic structure, and reveal critical regions susceptible to loss of diversity. Analyses of provinces show a clear division between Atlantic-Pacific and Antarctic-Subantartic assemblages, with high biogeographic isolation of the Subantarctic islands. Depending on spatial resolution, the biogeographic position of the Magellan area is spatially contradictory, clustering on the one hand with SSA ecoregions and on the other with Antarctic provinces. Our patterns appear to be driven by different combinations of processes and barriers, reflected in the stratified distribution of hydroids. The high level of endemism and concentration of species at the edge of distribution in the Magellan area and Scotia Arc suggest their transitional nature and particular importance for understanding the historical and ecological connections between SSA & A.

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Upper Bathyal Pacific Ocean biogeographic provinces from octocoral distributions

Cited by 9 publications

References 28 publications

Benthic biogeographic patterns on the deep Brazilian margin

Benthic biogeographic patterns on the deep Brazilian margin

A global biogeographic regionalization of the benthic ocean

Biodiversity and biogeography of hydroids across marine ecoregions and provinces of southern South America and Antarctica

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