Assemblage structure is related to slope and depth on a deep offshore <scp>P</scp>acific seamount chain

McClain, Craig R.; Lundsten, Lonny

doi:10.1111/maec.12136

Cited by 38 publications

(37 citation statements)

References 49 publications

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“…Vertical zonation, reflecting ecologically significant environmental gradients correlated with depth, is common on seamounts [4, 7, 28, 62, 63] and has been previously reported on Cobb Seamount above 180 m [18] and 700 m depth [11]. In the present study, the nine communities were distributed within six significantly different depth ranges.…”

Section: Discussionsupporting

confidence: 70%

“…The combination of the vertical zonation of narrow communities and the steep slopes of Cobb Seamount supports the hypothesis that high species turnover between vertically distributed communities ultimately produces the relatively high total biodiversity observed on seamounts [7]. It is notable that on Cobb Seamount, like on other Northeast Pacific seamounts, there was a unimodal relationship between the number of unique taxa (species turnover) and depth [62]. …”

Section: Discussionsupporting

confidence: 56%

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The Structure and Distribution of Benthic Communities on a Shallow Seamount (Cobb Seamount, Northeast Pacific Ocean)

2016

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Partially owing to their isolation and remote distribution, research on seamounts is still in its infancy, with few comprehensive datasets and empirical evidence supporting or refuting prevailing ecological paradigms. As anthropogenic activity in the high seas increases, so does the need for better understanding of seamount ecosystems and factors that influence the distribution of sensitive benthic communities. This study used quantitative community analyses to detail the structure, diversity, and distribution of benthic mega-epifauna communities on Cobb Seamount, a shallow seamount in the Northeast Pacific Ocean. Underwater vehicles were used to visually survey the benthos and seafloor in ~1600 images (~5 m2 in size) between 34 and 1154 m depth. The analyses of 74 taxa from 11 phyla resulted in the identification of nine communities. Each community was typified by taxa considered to provide biological structure and/or be a primary producer. The majority of the community-defining taxa were either cold-water corals, sponges, or algae. Communities were generally distributed as bands encircling the seamount, and depth was consistently shown to be the strongest environmental proxy of the community-structuring processes. The remaining variability in community structure was partially explained by substrate type, rugosity, and slope. The study used environmental metrics, derived from ship-based multibeam bathymetry, to model the distribution of communities on the seamount. This model was successfully applied to map the distribution of communities on a 220 km2 region of Cobb Seamount. The results of the study support the paradigms that seamounts are diversity 'hotspots', that the majority of seamount communities are at risk to disturbance from bottom fishing, and that seamounts are refugia for biota, while refuting the idea that seamounts have high endemism.

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Section: Discussionsupporting

confidence: 70%

Section: Discussionsupporting

confidence: 56%

The Structure and Distribution of Benthic Communities on a Shallow Seamount (Cobb Seamount, Northeast Pacific Ocean)

2016

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“…Fournier, Barbet‐Massin, Rome, & Courchamp, ; Stirling, Scott, & Wright, ). Depth and slope have been cited among the main environmental predictors associated with the zonation of benthic communities on seamounts (De la Torriente et al, ; Du Preez, Curtis, & Clarke, ; McClain & Lundsten, ; Serrano et al, ). Distributed as depth‐regulated bands, these assemblages or habitat structure patterns are likely to be a combination of suitable ecological conditions and local recruitment processes (De la Torriente et al, ).…”

Section: Discussionmentioning

confidence: 99%

Benthic habitat modelling and mapping as a conservation tool for marine protected areas: A seamount in the western Mediterranean

Torriente

González-Irusta

Aguilar³

et al. 2019

Aquatic Conservation

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1. An ecologically representative, well-connected, and effectively managed system of marine protected areas (MPAs) has positive ecological and environmental effects as well as social and economic benefits. Although progress in expanding the coverage of MPAs has been made, the application of management tools has not yet been implemented in most of these areas.2. In this work, distribution models were applied to nine benthic habitats on a Mediterranean seamount within an MPA for conservation purposes. Benthic habitat occurrences were identified from 55 remotely operated vehicle (ROV) transects, at depths from 76 to 700 m, and data derived from multibeam bathymetry. Generalized additive models (GAMs) were applied to link the presence of each benthic habitat to local environmental proxies (depth, slope, backscatter, aspect, and bathymetric position index, BPI).3. The main environmental drivers of habitat distribution were depth, slope, and BPI.Based on this result, five different geomorphological areas were distinguished. A full coverage map indicating the potential benthic habitat distribution on the seamount was obtained to inform spatial management. The distribution of those habitats identified as vulnerable marine ecosystems (VMEs)was used to make recommendations on zonation for developing the management plan of the MPA. This process reveals itself as an appropriate methodological approach that can be developed in other areas of the Natura 2000 marine network.

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“…Estas diferencias batimétricas conllevan variaciones en la productividad marina y en los patrones de biodiversidad asociados a la complejidad del hábitat [11]. CONCLUSIONES IV.…”

Section: Datosunclassified

Caracterización de la geoforma submarina Galera durante el proceso de extensión de plataforma continental ecuatoriana

Sánchez

Muñoz

Tituana

et al. 2018

CCTESPE

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Resumen-El fondo marino presenta un sin número de rasgos submarinos que forman parte de la estructura de la corteza oceánica. Dichos rasgos se nombran en múltiples estudios y publicaciones de acuerdo al nombre otorgado por cada investigador. Sin embargo, a medida que se extiende el estudio del fondo marino es necesario asignarles un nombre mediante consideraciones técnicas que actualmente son estandarizadas por la Organización Hidrográfica Internacional y el Subcomité de los Nombres de las Formas del Relieve Submarino de la GEBCO para la temática de la toponimia submarina. En el presente trabajo, a través del modelado de la data batimétrica con la herramienta en Sistemas de Información Geográfica "ArcGis", se encuentra la determinación de la existencia del monte submarino Galera, que fue aprobado por la SCUFN en 2017 por presentar una elevación de más de 1000 m (1027) con respecto al relieve circundante . El comportamiento geodinámico del monte Galera es de importancia regional porque se estima que en ~15000 años podría encontrarse en el límite de la fosa. Palabras Claves-Asperidades, batimetría, fondo oceánico, montes submarinosAbstract-The seabed has a variety of underwater features that conform the structure of the ocean crust. These features are named in studies and publications in a disorganized way. As the study of the seabed extends, it is necessary to assign a name to them using technical considerations that have been standardized by the International Hydrographic Organization (IHO) and the Sub-Committee on Undersea Feature Names (SCUFN) for the thematic underwater toponymy. In the present work, the existence of the Galera seamount was determined through bathymetric data modelling with the Geographic Information System tool "ArcGis", which was approved by SCUFN in 2017 because it shows an elevation higher than 1000m (1027) with respect to the surroundings. The geodynamic behaviour of mount Galera is of regional importance because it is estimated that it could be in the limit of the trench in ~15000 years.

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Assemblage structure is related to slope and depth on a deep offshore Pacific seamount chain

Cited by 38 publications

References 49 publications

The Structure and Distribution of Benthic Communities on a Shallow Seamount (Cobb Seamount, Northeast Pacific Ocean)

The Structure and Distribution of Benthic Communities on a Shallow Seamount (Cobb Seamount, Northeast Pacific Ocean)

Benthic habitat modelling and mapping as a conservation tool for marine protected areas: A seamount in the western Mediterranean

Caracterización de la geoforma submarina Galera durante el proceso de extensión de plataforma continental ecuatoriana

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