{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,7]],"date-time":"2026-02-07T14:06:39Z","timestamp":1770473199144,"version":"3.49.0"},"reference-count":62,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000270","name":"Natural Environment Research Council","doi-asserted-by":"publisher","award":["PR140015"],"award-info":[{"award-number":["PR140015"]}],"id":[{"id":"10.13039\/501100000270","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Tropical forests play a key role in the global carbon and hydrological cycles, maintaining biological diversity, slowing climate change, and supporting the global economy and local livelihoods. Yet, rapidly growing populations are driving continued degradation of tropical forests to supply wood products. The United Nations (UN) has developed the Reducing Emissions from Deforestation and Forest Degradation (REDD+) programme to mitigate climate impacts and biodiversity losses through improved forest management. Consistent and reliable systems are still needed to monitor tropical forests at large scales, however, degradation has largely been left out of most REDD+ reporting given the lack of effective monitoring and countries mainly focus on deforestation. Recent advances in combining optical data and Synthetic Aperture Radar (SAR) data have shown promise for improved ability to monitor forest losses, but it remains unclear if similar improvements could be made in detecting and mapping forest degradation. We used detailed selective logging records from three lowland tropical forest regions in the Brazilian Amazon to test the effectiveness of combining Landsat 8 and Sentinel-1 for selective logging detection. We built Random Forest models to classify pixel-based differences in logged and unlogged regions to understand if combining optical and SAR improved the detection capabilities over optical data alone. We found that the classification accuracy of models utilizing optical data from Landsat 8 alone were slightly higher than models that combined Sentinel-1 and Landsat 8. In general, detection of selective logging was high with both optical only and optical-SAR combined models, but our results show that the optical data was dominating the predictive performance and adding SAR data introduced noise, lowering the detection of selective logging. While we have shown limited capabilities with C-band SAR, the anticipated opening of the ALOS-PALSAR archives and the anticipated launch of NISAR and BIOMASS in 2023 should stimulate research investigating similar methods to understand if longer wavelength SAR might improve classification of areas affected by selective logging when combined with optical data.<\/jats:p>","DOI":"10.3390\/rs14010179","type":"journal-article","created":{"date-parts":[[2022,1,9]],"date-time":"2022-01-09T23:06:15Z","timestamp":1641769575000},"page":"179","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Combining Sentinel-1 and Landsat 8 Does Not Improve Classification Accuracy of Tropical Selective Logging"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5680-0635","authenticated-orcid":false,"given":"Matthew G.","family":"Hethcoat","sequence":"first","affiliation":[{"name":"Environmental Dynamics Group, School of Mathematics and Statistics, University of Sheffield, Sheffield S3 7RH, UK"},{"name":"Ecology and Evolutionary Biology, School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK"},{"name":"Grantham Centre for Sustainable Futures, University of Sheffield, Sheffield S10 2TN, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2737-9420","authenticated-orcid":false,"given":"Jo\u00e3o M. B.","family":"Carreiras","sequence":"additional","affiliation":[{"name":"Environmental Dynamics Group, School of Mathematics and Statistics, University of Sheffield, Sheffield S3 7RH, UK"},{"name":"National Centre for Earth Observation, University of Sheffield, Sheffield S3 7RH, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7943-4781","authenticated-orcid":false,"given":"Robert G.","family":"Bryant","sequence":"additional","affiliation":[{"name":"Department of Geography, University of Sheffield, Sheffield S3 7ND, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4452-4829","authenticated-orcid":false,"given":"Shaun","family":"Quegan","sequence":"additional","affiliation":[{"name":"Environmental Dynamics Group, School of Mathematics and Statistics, University of Sheffield, Sheffield S3 7RH, UK"},{"name":"National Centre for Earth Observation, University of Sheffield, Sheffield S3 7RH, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8562-3853","authenticated-orcid":false,"given":"David P.","family":"Edwards","sequence":"additional","affiliation":[{"name":"Ecology and Evolutionary Biology, School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1126\/science.aam5962","article-title":"Tropical forests are a net carbon source based on aboveground measurements of gain and loss","volume":"358","author":"Baccini","year":"2017","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1038\/nature18326","article-title":"Anthropogenic disturbance in tropical forests can double biodiversity loss from deforestation","volume":"535","author":"Barlow","year":"2016","journal-title":"Nature"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1038\/nature14258","article-title":"Defining the Anthropocene","volume":"519","author":"Lewis","year":"2015","journal-title":"Nature"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"988","DOI":"10.1126\/science.1201609","article-title":"A Large and Persistent Carbon Sink in the World\u2019s Forests","volume":"333","author":"Pan","year":"2011","journal-title":"Science"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"R1008","DOI":"10.1016\/j.cub.2019.08.026","article-title":"Conservation of Tropical Forests in the Anthropocene","volume":"29","author":"Edwards","year":"2019","journal-title":"Curr. 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