{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:38:12Z","timestamp":1760243892814,"version":"build-2065373602"},"reference-count":36,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2010,2,11]],"date-time":"2010-02-11T00:00:00Z","timestamp":1265846400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Disturbance plays a fundamental role in determining the vertical structure of vegetation in many terrestrial ecosystems, and knowledge of disturbance histories is vital for developing effective management and restoration plans. In this study, we investigated the potential of using vertical vegetation profiles derived from discrete-return lidar to predict time since fire (TSF) in a landscape of oak scrub in east-central Florida. We predicted that fire influences vegetation structure at the mesoscale (i.e., spatial scales of tens of meters to kilometers). To evaluate this prediction, we binned lidar returns into 1m vertical by 5 \u00d7 5 m horizontal cells and averaged the resulting profiles over a range of horizontal window sizes (0 to 500 m on a side). We then performed a series of resampling tests to compare the performance of support vector machine (SVM), k-nearest neighbor (k-NN), logistic regression, and linear discriminant analysis (LDA) classifiers and to estimate the amount of training data necessary to achieve satisfactory performance. Our results indicate that: (1) the SVMs perform significantly better than the other classifiers, (2) SVM classifiers may require relatively small training data sets, and (3) the highest classification accuracies occur with averaging over windows representing sizes in the mesoscale range.<\/jats:p>","DOI":"10.3390\/rs2020514","type":"journal-article","created":{"date-parts":[[2010,2,11]],"date-time":"2010-02-11T11:08:27Z","timestamp":1265886507000},"page":"514-525","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Using Lidar-Derived Vegetation Profiles to Predict Time since Fire in an Oak Scrub Landscape in East-Central Florida"],"prefix":"10.3390","volume":"2","author":[{"given":"James  J.","family":"Angelo","sequence":"first","affiliation":[{"name":"Department of Biology, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL, 32816-2368, USA"}]},{"given":"Brean  W.","family":"Duncan","sequence":"additional","affiliation":[{"name":"Innovative Health Applications, Mail Code: IHA-300, Kennedy Space Center, FL, 32899, USA"}]},{"given":"John  F.","family":"Weishampel","sequence":"additional","affiliation":[{"name":"Department of Biology, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL, 32816-2368, USA"}]}],"member":"1968","published-online":{"date-parts":[[2010,2,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1007\/BF02860857","article-title":"Pattern, process, and natural disturbance in vegetation","volume":"45","author":"White","year":"1979","journal-title":"Bot. Rev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1016\/0378-1127(80)90013-4","article-title":"Forest development in North America following major disturbances","volume":"3","author":"Oliver","year":"1980","journal-title":"Forest Ecol. Manage."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Hunter, M. (1999). Maintaining Biodiversity in Forest Ecosystems, Cambridge University Press.","DOI":"10.1017\/CBO9780511613029"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"308","DOI":"10.1890\/070176","article-title":"Monitoring and evaluating the ecological integrity of forest ecosystems","volume":"7","author":"Tierney","year":"2009","journal-title":"Front. Ecol. Environ."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"483","DOI":"10.1007\/BF02940573","article-title":"Ecological effects of forest fires","volume":"26","author":"Ahlgren","year":"1960","journal-title":"Bot. Rev."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"387","DOI":"10.1016\/j.tree.2005.04.025","article-title":"Fire as a global \u2018herbivore\u2019: the ecology and evolution of flammable ecosystems","volume":"20","author":"Bond","year":"2005","journal-title":"Trend. Ecol. Evolut."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1890\/07-1289.1","article-title":"Environmental controls on the distribution of wildfire at multiple spatial scales","volume":"79","author":"Parisien","year":"2009","journal-title":"Ecol. Monogr."},{"key":"ref_8","first-page":"1179","article-title":"Overview of the use of natural variability concepts in managing ecological systems","volume":"9","author":"Landres","year":"1999","journal-title":"Ecol. Appl."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1641\/0006-3568(2003)053[0077:TIOLUL]2.0.CO;2","article-title":"The importance of land-use legacies to ecology and conservation","volume":"53","author":"Foster","year":"2003","journal-title":"Bioscience."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"199","DOI":"10.2307\/1942611","article-title":"Fire and landscape diversity in subalpine forests of Yellowstone National Park","volume":"52","author":"Romme","year":"1982","journal-title":"Ecol. Monogr."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"731","DOI":"10.2307\/3235886","article-title":"Effects of fire on landscape heterogeneity in Yellowstone National Park, Wyoming","volume":"5","author":"Turner","year":"1994","journal-title":"J. Veg. Sci."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1146\/annurev.environ.33.020107.113339","article-title":"Terrestrial vegetation in the coupled human-Earth system: contributions of remote sensing","volume":"33","author":"DeFries","year":"2008","journal-title":"Ann. Rev. Environ. Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"250","DOI":"10.5589\/m07-031","article-title":"Effects of band combinations and GIS masking on fire-scar mapping at local scales in east-central Florida, USA","volume":"33","author":"Shao","year":"2007","journal-title":"Can. J. Remote Sens."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1641\/0006-3568(2002)052[0019:LRSFES]2.0.CO;2","article-title":"Lidar remote sensing for ecosystem studies","volume":"52","author":"Lefsky","year":"2002","journal-title":"Bioscience"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"881","DOI":"10.1093\/jxb\/erl142","article-title":"3D lidar imaging for detecting and understanding plant responses and canopy structure","volume":"58","author":"Omasa","year":"2007","journal-title":"J. Exp. Bot."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1016\/S0034-4257(03)00139-1","article-title":"Characterizing vertical forest structure using small-footprint airborne LiDAR","volume":"87","author":"Zimble","year":"2003","journal-title":"Remote Sens. Environ."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"873","DOI":"10.1890\/02-5317","article-title":"Beyond potential vegetation: combining lidar data and a height-structured model for carbon studies","volume":"14","author":"Hurtt","year":"2004","journal-title":"Ecol. Appl."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1080\/02827580310019257","article-title":"Practical large-scale forest stand inventory using a small-footprint airborne scanning laser","volume":"19","author":"Naesset","year":"2004","journal-title":"Scand. J. Forest Res."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"2137","DOI":"10.1890\/07-0004.1","article-title":"Multi-trophic invasion resistance in Hawaii: Bioacoustics, field surveys, and airborne remote sensing","volume":"17","author":"Boelman","year":"2007","journal-title":"Ecol. Appl."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1016\/j.foreco.2008.04.025","article-title":"Multi-source land cover classification for forest fire management based on imaging spectrometry and LiDAR data","volume":"256","author":"Koetz","year":"2008","journal-title":"Forest Ecol. Manage."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"946","DOI":"10.1016\/j.rse.2009.01.003","article-title":"Characterizing forest succession with lidar data: An evaluation for the Inland Northwest, USA","volume":"113","author":"Falkowski","year":"2009","journal-title":"Remote Sens. Environ."},{"key":"ref_22","unstructured":"Schmalzer, P.A., and Hinkle, C.R. (1987). Effects of Fire on Composition, Biomass, and Nutrients in Oak Scrub Vegetation on John F. Kennedy Space Center, Florida."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Anderson, R.C., Fralish, J.S., and Baskin, J.M. (1999). Savannas, Barrens, and Rock Outcrop Plant Communities of North America, Cambridge University Press.","DOI":"10.1017\/CBO9780511574627"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1023\/A:1008029831187","article-title":"Coupling past management practice and historic landscape change on John F. Kennedy Space Center, Florida","volume":"14","author":"Duncan","year":"1999","journal-title":"Landscape Ecol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1016\/j.foreco.2009.03.053","article-title":"Delineating a managed fire regime and exploring its relationship to the natural fire regime in East Central Florida, USA: a remote sensing and GIS approach","volume":"258","author":"Duncan","year":"2009","journal-title":"Forest Ecol. Manage."},{"key":"ref_26","unstructured":"McGaughey, R.J. (2009). FUSION\/LDV: Software for LIDAR Data Analysis and Visualization, US Department of Agriculture, Forest Service, Pacific Northwest Research Station."},{"key":"ref_27","unstructured":"SJRWMD (2006). SJRWMD Land Use and Land Cover\u20132004, St. Johns River Water Management District."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v011.i09","article-title":"kernlab\u2013An S4 package for kernel methods in R","volume":"11","author":"Karatzoglou","year":"2004","journal-title":"J. Stat. Softw."},{"key":"ref_29","unstructured":"(2008). R: A Language and Environment for Statistical Computing, R Development Core Team, R Foundation for Statistical Computing."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1023\/A:1009715923555","article-title":"A tutorial on support vector machines for pattern recognition","volume":"2","author":"Burges","year":"1998","journal-title":"Data Min. Knowl. Discov."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1416","DOI":"10.1109\/TGRS.2008.916480","article-title":"Fusion of hyperspectral and LIDAR remote sensing data for classification of complex forest areas","volume":"46","author":"Dalponte","year":"2008","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1778","DOI":"10.1109\/TGRS.2004.831865","article-title":"Classification of hyperspectral remote sensing images with support vector machines","volume":"42","author":"Melgani","year":"2004","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/j.ecoinf.2006.03.002","article-title":"Predictive models in ecology: comparison of performances and assessment of applicability","volume":"1","author":"Tan","year":"2006","journal-title":"Ecol. Inform."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Fielding, A.H. (2007). Cluster and Classification Techniques for the Biosciences, Cambridge University Press.","DOI":"10.1017\/CBO9780511607493"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"447","DOI":"10.2307\/2937313","article-title":"Cross-scale morphology, geometry, and dynamics of ecosystems","volume":"62","author":"Holling","year":"1992","journal-title":"Ecol. Monogr."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"903","DOI":"10.1111\/j.1523-1739.2004.521_1.x","article-title":"Forest restoration and fire: principles in the context of place","volume":"18","author":"Brown","year":"2004","journal-title":"Conserv. Biol."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/2\/2\/514\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T22:01:28Z","timestamp":1760220088000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/2\/2\/514"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,2,11]]},"references-count":36,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2010,2]]}},"alternative-id":["rs2020514"],"URL":"https:\/\/doi.org\/10.3390\/rs2020514","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2010,2,11]]}}}