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Application of Sentinel-2 multispectral data for habitat mapping of Pacific Islands: Palau Republic (Micronesia, Pacific Ocean)

TitoloApplication of Sentinel-2 multispectral data for habitat mapping of Pacific Islands: Palau Republic (Micronesia, Pacific Ocean)
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2019
AutoriImmordino, Francesco, Barsanti Mattia, Candigliota Elena, Cocito Silvia, Delbono Ivana, and Peirano Andrea
RivistaJournal of Marine Science and Engineering
Volume7
Issue9
Paginazione316
Data di pubblicazioneJan-09-2019
ISSN20771312
Abstract

Sustainable and ecosystem-based marine spatial planning is a priority of Pacific Island countries basing their economy on marine resources. The urgency of management coral reef systems and associated coastal environments, threatened by the effects of climate change, require a detailed habitat mapping of the present status and a future monitoring of changes over time. Here, we present a remote sensing study using free available Sentinel-2 imagery for mapping at large scale the most sensible and high value habitats (corals, seagrasses, mangroves) of Palau Republic (Micronesia, Pacific Ocean), carried out without any sea truth validation. Remote sensing 'supervised' and 'unsupervised' classification methods applied to 2017 Sentinel-2 imagery with 10 m resolution together with comparisons with free ancillary data on web platform and available scientific literature were used to map mangrove, coral, and seagrass communities in the Palau Archipelago. This paper addresses the challenge of multispectral benthic mapping estimation using commercial software for preprocessing steps (ERDAS ATCOR) and for benthic classification (ENVI) on the base of satellite image analysis. The accuracy of the methods was tested comparing results with reference NOAA (National Oceanic and Atmospheric Administration, Silver Spring, MD, USA) habitat maps achieved through Ikonos and Quickbird imagery interpretation and sea-truth validations. Results showed how the proposed approach allowed an overall good classification of marine habitats, namely a good concordance of mangroves cover around Palau Archipelago with previous literature and a good identification of coastal habitats in two sites (barrier reef and coastal reef) with an accuracy of 39.8-56.8%, suitable for survey and monitoring of most sensible habitats in tropical remote islands. © 2019 by the authors.

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cited By 2

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85072569876&doi=10.3390%2fjmse7090316&partnerID=40&md5=8e07c359be1a9a4c2e304a6be624cd50
DOI10.3390/jmse7090316
Titolo breveJMSE
Citation KeyImmordino2019