{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,28]],"date-time":"2026-01-28T06:13:31Z","timestamp":1769580811029,"version":"3.49.0"},"reference-count":63,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2017,9,1]],"date-time":"2017-09-01T00:00:00Z","timestamp":1504224000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>This study presents the results of object-based classifications assessing the potential of bi-temporal Pl\u00e9iades images for mapping broadleaf and coniferous tree species potentially used by the ring-necked parakeet Psittacula krameri for nesting in the urban area of Marseille, France. The first classification was performed based solely on a summer Pl\u00e9iades image (acquired on 28 July 2015) and the second classification based on bi-temporal Pl\u00e9iades images (a spring image acquired on 24 March 2016 and the summer image). An ensemble of spectral and textural features was extracted from both images and two machine-learning classifiers were used, Random Forest (RF) and Support Vector Machine (SVM). Regardless of the classifiers, model results suggest that classification based on bi-temporal Pl\u00e9iades images produces more satisfying results, with an overall accuracy 11.5\u201313.9% higher than classification using the single-date image. Textural and spectral features extracted from the blue and the NIR bands were consistently ranked among the most important features. Regardless of the classification scheme, RF slightly outperforms SVM. RF classification using bi-temporal Pl\u00e9iades images allows identifying 98.5% of the tree species used by the ring-necked parakeet for nesting, highlighting the promising value of remote sensing techniques to assess the ecological requirements of fauna in urban areas.<\/jats:p>","DOI":"10.3390\/rs9090916","type":"journal-article","created":{"date-parts":[[2017,9,1]],"date-time":"2017-09-01T11:05:24Z","timestamp":1504263924000},"page":"916","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["\u201cKill Two Birds with One Stone\u201d: Urban Tree Species Classification Using Bi-Temporal Pl\u00e9iades Images to Study Nesting Preferences of an Invasive Bird"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0816-5761","authenticated-orcid":false,"given":"Marine","family":"Le Louarn","sequence":"first","affiliation":[{"name":"Aix Marseille Univ, IRD, LPED, Marseille, France"},{"name":"Mus\u00e9um National d\u2019Histoire Naturelle, UMR CESCO, 43 rue Buffon, CP135, 75005 Paris, France"}]},{"given":"Philippe","family":"Clergeau","sequence":"additional","affiliation":[{"name":"Mus\u00e9um National d\u2019Histoire Naturelle, UMR CESCO, 43 rue Buffon, CP135, 75005 Paris, France"}]},{"given":"Elodie","family":"Briche","sequence":"additional","affiliation":[{"name":"Aix Marseille Univ, IRD, LPED, Marseille, France"}]},{"given":"Magali","family":"Deschamps-Cottin","sequence":"additional","affiliation":[{"name":"Aix Marseille Univ, IRD, LPED, Marseille, France"}]}],"member":"1968","published-online":{"date-parts":[[2017,9,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"607","DOI":"10.2307\/1313420","article-title":"Quantifying Threats to Imperiled Species in the United States: Assessing the relative importance of habitat destruction, alien species, pollution, overexploitation, and disease","volume":"48","author":"Wilcove","year":"1998","journal-title":"BioScience"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"470","DOI":"10.1016\/j.tree.2004.07.005","article-title":"Are invasive species a major cause of extinctions?","volume":"19","author":"Gurevitch","year":"2004","journal-title":"Trends Ecol. 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