{"key":"441fec02-b448-4db6-80bd-51fdf11bb611","installationKey":"faeb021c-ab9f-4c80-9587-3749a8f6fb23","publishingOrganizationKey":"ba7b835b-ec0d-4380-99a5-9065b4206868","doi":"10.15468/7g5re7","external":false,"numConstituents":0,"type":"OCCURRENCE","subtype":"OBSERVATION","shortName":"subtidal_benthos_strait_of_magellan","title":"Subtidal Megabenthic Biodiversity of Rocky Bottoms in the Strait of Magellan - Rewilding Chile Foundation","description":"

This study investigates the distribution patterns of subtidal benthic communities in the Strait of Magellan.

Conducted during the austral winter of 2021, the field expedition surveyed five locations through scuba diving and photographic records along vertical transects.

This study provides relevant information on subtidal biodiversity in rocky habitats of southern Chile.

","language":"eng","citation":{"text":"Rodríguez B, Hüne M (2025). Subtidal Megabenthic Biodiversity of Rocky Bottoms in the Strait of Magellan - Rewilding Chile Foundation. Fundación Rewilding Chile. Occurrence dataset https://doi.org/10.15468/7g5re7 accessed via GBIF.org on 2026-10-12.","citationProvidedBySource":false},"contactsCitation":[{"key":6143385,"abbreviatedName":"Rodríguez B","firstName":"Benjamín","lastName":"Rodríguez","roles":["ORIGINATOR"],"userId":[]},{"key":6143386,"abbreviatedName":"Hüne M","firstName":"Mathias","lastName":"Hüne","roles":["METADATA_AUTHOR"],"userId":[]}],"lockedForAutoUpdate":false,"createdBy":"ba7b835b-ec0d-4380-99a5-9065b4206868","modifiedBy":"ba7b835b-ec0d-4380-99a5-9065b4206868","created":"2025-06-17T13:33:43.963+00:00","modified":"2025-12-19T19:08:18.258+00:00","contacts":[{"key":6143385,"type":"ORIGINATOR","primary":true,"userId":[],"firstName":"Benjamín","lastName":"Rodríguez","position":[],"email":["benja.rodriguez.stepke@gmail.com"],"phone":[],"homepage":[],"organization":"RewildingChile","address":[],"city":"VIÑA DEL 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Study Sites in the Strait of Magellan

\n\n

1. Carlos III Island
\nLocated at the boundary between the central and western micro-basins of the Strait of Magellan. This station borders the Francisco Coloane Multiple-Use Marine Protected Area, which covers approximately 672 km².

\n\n

2. Clarence Island – Simón Bay and Bell Bay
\nLocated approximately 30 km southeast of Carlos III Island. Both bays open directly into the Strait of Magellan and lie within the Kawésqar National Reserve.

\n\n

3. Brunswick Peninsula – Cape San Isidro and Observatorio Island
\nLocated approximately 60 km southeast of Clarence Island. These sites are situated along the boundary of the future Cabo Froward National Park, currently designated as a Protected National Asset (Bien Nacional Protegido, BNP).

\n\n

General Environmental Characteristics
\nThe region exhibits a precipitation gradient from southwest to northeast. Rocky bottoms extend beyond 25 meters in depth. The area is influenced by water masses from the Cape Horn Current entering from the South Pacific Ocean, with a lesser influence from Atlantic waters. Freshwater input originates from precipitation, coastal river discharge, and glacial meltwater.

","boundingBox":{"minLatitude":-90.0,"maxLatitude":90.0,"minLongitude":-180.0,"maxLongitude":180.0,"globalCoverage":true}}],"temporalCoverages":[{"@type":"range","start":"2021-07-07T00:00:00.000+00:00","end":"2021-07-15T00:00:00.000+00:00"}],"keywordCollections":[{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml","keywords":["Marine invertebrates","Diversity","Subtidal zone","Benthos","Occurrence"]},{"thesaurus":"GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml","keywords":["Observation"]}],"samplingDescription":{"studyExtent":"

The study was conducted in the interior of the Comau Fjord, Cahuelmó Fjord, and Lilihuapi Island, located in the southern region of Chile.

","sampling":"

This study investigates the distribution patterns of subtidal benthic communities in the Strait of Magellan. Conducted during the austral winter of 2021, the field expedition surveyed five locations using scuba diving and photographic records along vertical transects (from 5 to 20 m depth). The main objective was to examine spatial scales—vertical (depth gradient) versus horizontal (differences among locations)—that explain community variation. Three replicates were obtained per depth level using 0.25 m² quadrats, identifying megabenthic organisms (<2 cm) to the lowest possible taxonomic level. The abundance of individual species was recorded, and colonial invertebrates were noted as presence/absence. This study provides relevant information on subtidal biodiversity in rocky habitats of southern Chile.

","methodSteps":["

Fieldwork was conducted using scuba diving along vertical transects at five locations, with images collected using a Nikon D500 digital camera equipped with a Tokina 10–17 mm fisheye lens. The camera was housed in an ISOTTA underwater casing and paired with dual INON Z-330 strobes to ensure optimal lighting. Photographic quadrats of 0.25 m² (50 × 50 cm) were used to document the megabenthic assemblages at depths between 5 and 20 meters. Image analysis and species identification were conducted using standard taxonomic literature and image review. Data processing and statistical analyses were performed using R (R Core Team, 2024), including both univariate and multivariate methods. QGIS was used for spatial visualization and mapping.

"]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"spa","purpose":"

This study investigates the distribution patterns of subtidal benthic communities in the Strait of Magellan. Conducted during the austral winter of 2021, the field expedition surveyed five locations through scuba diving and photographic records along vertical transects (from 5 to 20 m depth). The main objective was to examine spatial scales—vertical (depth gradient) versus horizontal (differences among locations)—that explain community variation.

","introduction":"

The Strait of Magellan, located in the sub-Antarctic Magellanic region of southern Chile, is a dynamic and ecologically rich area shaped by glacial history, oceanographic processes, and complex coastal geomorphology. Rocky subtidal habitats in this region act as biodiversity hotspots, supporting a high degree of endemism and playing key ecological and socioeconomic roles. Understanding the vertical and horizontal distribution patterns of benthic communities is essential to assess how abiotic and biotic factors influence their structure. This study aims to characterize subtidal benthic assemblages across five locations in the Strait of Magellan during the austral winter, focusing on whether community variation is primarily driven by depth (vertical scale) or by differences among sites (horizontal scale).

","acknowledgements":"

This work was made possible thanks to Rewilding Chile Foundation, a Chilean non-profit organization financially supported by a broad philanthropic network.

","pubDate":"2025-06-17T00:00:00.000+00:00","maintenanceUpdateFrequency":"NOT_PLANNED","maintenanceDescription":"","license":"http://creativecommons.org/licenses/by/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Occurrence","extensions":[],"modified":"2026-07-11T05:24:35.763+00:00"},"approximateCounts":{"occurrenceCount":180}}