{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,24]],"date-time":"2026-02-24T14:41:22Z","timestamp":1771944082762,"version":"3.50.1"},"reference-count":57,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2022,3,20]],"date-time":"2022-03-20T00:00:00Z","timestamp":1647734400000},"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>Mangrove forests have unique ecosystem functions and services, yet the coastal mangroves in tropics are often disturbed by tropical cyclones. Hurricane Maria swept Puerto Rico and nearby Caribbean islands in September 2017 and caused tremendous damage to the coastal mangrove systems. Understanding the vulnerability and resistance of mangrove forests to disturbances is pivotal for future restoration and conservation. In this study, we used LiDAR point clouds to derive the canopy height of five major mangrove forests, including true mangroves and mangrove associates, along the coast of Puerto Rico before and after the hurricanes, which allowed us to detect the spatial variations of canopy height reduction. We then spatially regressed the pre-hurricane canopy height and the canopy height reduction on biophysical factors such as the elevation, the distance to rivers\/canals within and nearby, the distance to coast, tree density, and canopy unevenness. The analyses resulted in the following findings. The pre-hurricane canopy height increased with elevation when elevation was low and moderate but decreased with elevation when elevation was high. The canopy height reduction increased quadratically with the pre-hurricane canopy height, but decreased with elevation for the four sites dominated by true mangroves. The site of Palma del Mar dominated by Pterocarpus, a mangrove associate, experienced the strongest wind, and the canopy height reduction increased with elevation. The canopy height reduction decreased with the distance to rivers\/canals only for sites with low to moderate mean elevation of 0.36\u20130.39 m. In addition to the hurricane winds, the rainfall during hurricanes is an important factor causing canopy damage by inundating the aerial roots. In summary, the pre-hurricane canopy structures, physical environment, and external forces brought by hurricanes interplayed to affect the vulnerability of coastal mangroves to major hurricanes.<\/jats:p>","DOI":"10.3390\/rs14061497","type":"journal-article","created":{"date-parts":[[2022,3,20]],"date-time":"2022-03-20T21:37:17Z","timestamp":1647812237000},"page":"1497","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Elevation Regimes Modulated the Responses of Canopy Structure of Coastal Mangrove Forests to Hurricane Damage"],"prefix":"10.3390","volume":"14","author":[{"given":"Qiong","family":"Gao","sequence":"first","affiliation":[{"name":"Department of Environmental Sciences, University of Puerto Rico, Rio Piedras, San Juan, PR 00926, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mei","family":"Yu","sequence":"additional","affiliation":[{"name":"Department of Environmental Sciences, University of Puerto Rico, Rio Piedras, San Juan, PR 00926, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1146\/annurev-marine-010213-135020","article-title":"Carbon Cycling and Storage in Mangrove Forests","volume":"6","author":"Alongi","year":"2014","journal-title":"Annu. Rev. Mar. Sci."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"523","DOI":"10.1038\/nclimate3326","article-title":"Global patterns in mangrove soil carbon stocks and losses","volume":"7","author":"Atwood","year":"2017","journal-title":"Nat. Clim. Chang."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"186","DOI":"10.1016\/j.aquabot.2008.01.009","article-title":"Faunal impact on vegetation structure and ecosystem function in mangrove forests: A review","volume":"89","author":"Cannicci","year":"2008","journal-title":"Aquat. Bot."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1111\/nph.12605","article-title":"How mangrove forests adjust to rising sea level","volume":"202","author":"Krauss","year":"2014","journal-title":"New Phytol."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1343","DOI":"10.1007\/s13157-019-01138-x","article-title":"Landscape-Level Consequences of Rising Sea-Level on Coastal Wetlands: Saltwater Intrusion Drives Displacement and Mortality in the Twenty-First Century","volume":"39","author":"Yu","year":"2019","journal-title":"Wetlands"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1017\/S0376892905001967","article-title":"Valuing ecosystem functions: An empirical study on the storm protection function of Bhitarkanika mangrove ecosystem, India","volume":"32","author":"Badola","year":"2005","journal-title":"Environ. Conserv."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Cartier, K. (2019). Hurricanes Hit Puerto Rico\u2019s Mangroves Harder Than Florida\u2019s. EOS, 100.","DOI":"10.1029\/2019EO137889"},{"key":"ref_8","unstructured":"Duryea, M.L., and Kamp, E. (2017). Wind and Trees: Lessons Learned from Hurricanes, School of Forest Resources and Conservation, University of Florida FAS Extension."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1672\/08-40.1","article-title":"Cumulative impacts of hurricanes on Florida mangrove ecosystems: Sediment deposition, storm surges and vegetation","volume":"29","author":"Smith","year":"2009","journal-title":"Wetlands"},{"key":"ref_10","first-page":"447","article-title":"A review of mechanistic modelling of wind damage risk to forests","volume":"81","author":"Gardiner","year":"2008","journal-title":"For. Int. J. For. Res."},{"key":"ref_11","first-page":"147","article-title":"Wind as a natural disturbance agent in forests: A synthesis","volume":"86","author":"Mitchell","year":"2012","journal-title":"For. Int. J. For. Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1703","DOI":"10.5194\/nhess-21-1703-2021","article-title":"A cross-scale study for compound flooding processes during Hurricane Florence","volume":"21","author":"Ye","year":"2021","journal-title":"Nat. Hazards Earth Syst. Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1007\/BF00005670","article-title":"Prolonged inundation and ecological changes in an Avicennia mangrove: Implications for conservation and management","volume":"285","author":"Choy","year":"1994","journal-title":"Hydrobiologia"},{"key":"ref_14","first-page":"213","article-title":"Tropical cyclones and the organization of mangrove forests: A review","volume":"125","author":"Krauss","year":"2019","journal-title":"Ann. Bot."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Goldstein, G., and Santiago, L.S. (2016). The Physiology of Mangrove Trees with Changing Climate. Tropical Tree Physiology: Adaptations and Responses in a Changing Environment, Springer International Publishing.","DOI":"10.1007\/978-3-319-27422-5"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"701","DOI":"10.15517\/rbt.v65i2.24372","article-title":"Stomatal density, leaf area and plant size variation of Rhizophora mangle (Malpighiales: Rhizophoraceae) along a salinity gradient in the Mexican Caribbean","volume":"65","author":"Peel","year":"2017","journal-title":"Rev. Biol. Trop."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1590\/0102-33062017abb0100","article-title":"The effects of salinity on growth and survival of mangrove seedlings changes with age","volume":"32","author":"Kodikara","year":"2018","journal-title":"Acta Bot. Bras."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1111\/j.1399-3054.1986.tb01264.x","article-title":"Salt balance of leaves of the mangrove Avicennia marina","volume":"67","author":"Waisel","year":"2006","journal-title":"Physiol. Plant."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"385","DOI":"10.1093\/aob\/mcu174","article-title":"Regulation of water balance in mangroves","volume":"115","author":"Reef","year":"2015","journal-title":"Ann.Bot."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Wang, Y. (2014). Mangrove Forests. Encyclopedia of Natural Resources\u2013Land, Taylor & Francis Group.","DOI":"10.1081\/E-ENRL"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Branoff, B. (2018). Urban Mangrove Biology and Ecology: Emergent Patterns and Management Implications, University of Puerto Rico.","DOI":"10.1007\/978-3-319-73016-5_23"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1016\/j.foreco.2008.08.037","article-title":"Conversion and recovery of Puerto Rican mangroves: 200 years of change","volume":"257","author":"Martinuzzi","year":"2009","journal-title":"For. Ecol. Manag."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"200","DOI":"10.18475\/cjos.v43i2.a6","article-title":"Ecophysiology of a Mangrove Forest in Jobos Bay, Puerto Rico","volume":"43","author":"Lugo","year":"2007","journal-title":"Caribb. J. Sci."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"e22089","DOI":"10.3897\/BDJ.5.e22089","article-title":"Dataset of \u201ctrue mangroves\u201d plant species traits","volume":"5","author":"Quadros","year":"2017","journal-title":"Biodivers. Data J."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Miller, G.L., and Lugo, A.E. (2009). Guide to the Ecological Systems of Puerto Rico, U.S. Department of Agriculture, Forest Service, International Institute of Tropical Forestry.","DOI":"10.2737\/IITF-GTR-35"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"4831","DOI":"10.1073\/pnas.1908597117","article-title":"Hurricanes fertilize mangrove forests in the Gulf of Mexico (Florida Everglades, USA)","volume":"117","author":"Chambers","year":"2020","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"064010","DOI":"10.1088\/1748-9326\/ab82cf","article-title":"Widespread mangrove damage resulting from the 2017 Atlantic mega hurricane season","volume":"15","author":"Taillie","year":"2020","journal-title":"Environ. Res. Lett."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Branoff, B., and Martinuzzi, S. (2018). Mangrove forest structure and composition along urban gradients in Puerto Rico. bioRxiv, 504928.","DOI":"10.1101\/504928"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"3","DOI":"10.2307\/2997693","article-title":"Mangrove biodiversity and ecosystem function","volume":"7","author":"Field","year":"1998","journal-title":"Glob. Ecol. Biogeogr. Lett."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"154","DOI":"10.1111\/j.1466-8238.2010.00584.x","article-title":"Status and distribution of mangrove forests of the world using earth observation satellite data","volume":"20","author":"Giri","year":"2011","journal-title":"Glob. Ecol. Biogeogr."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"104046","DOI":"10.1088\/1748-9326\/abae2c","article-title":"Topography, drainage capability, and legacy of drought differentiate tropical ecosystem response to and recovery from major hurricanes","volume":"15","author":"Yu","year":"2020","journal-title":"Environ. Res. Lett."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"319","DOI":"10.1016\/j.rse.2013.03.017","article-title":"Mapping biomass change after forest disturbance: Applying LiDAR footprint-derived models at key map scales","volume":"134","author":"Huang","year":"2013","journal-title":"Remote Sens. Environ."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"31","DOI":"10.34237\/1008744","article-title":"JALBTCX\/NCMP emergency-response airborne Lidar coastal mapping & quick response data products for 2016\/2017\/2018 hurricane impact assessments","volume":"87","author":"Eisemann","year":"2019","journal-title":"Shore Beach"},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Gao, Q., and Yu, M. (2021). Elevation and Distribution of Freshwater and Sewage Canals Regulate Canopy Structure and Differentiate Hurricane Damages to a Basin Mangrove Forest. Remote Sens., 13.","DOI":"10.3390\/rs13173387"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"356","DOI":"10.2747\/1548-1603.44.4.356","article-title":"The forest types and ages cleared for land development in Puerto Rico","volume":"44","author":"Kennaway","year":"2007","journal-title":"Gisci. Remote Sens."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Gao, Q., and Yu, M. (2014). Discerning Fragmentation Dynamics of Tropical Forest and Wetland during Reforestation, Urban Sprawl, and Policy Shifts. Plos ONE, 9.","DOI":"10.1371\/journal.pone.0113140"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"4045","DOI":"10.3390\/rs5084045","article-title":"NASA Goddard\u2019s LiDAR, Hyperspectral and Thermal (G-LiHT) Airborne Imager","volume":"5","author":"Cook","year":"2013","journal-title":"Remote Sens."},{"key":"ref_38","unstructured":"Office for Coastal Management (2022, March 15). C-CAP Land Cover, Puerto Rico, Available online: https:\/\/www.fisheries.noaa.gov\/inport\/item\/48301."},{"key":"ref_39","unstructured":"Roussel, J.-R., Auty, D., Boissieu, F.D., and Meador, A.S. (2021, August 24). lidR: Airborne LiDAR Data Manipulation and Visualization for Forestry Applications. Available online: https:\/\/cran.r-project.org\/package=lidR."},{"key":"ref_40","unstructured":"Pasch, R.J., Penny, A.B., and Berg, R. (2019). National Hurricane Center Tropical Cyclone Report\u2013Hurricane Maria (AL152017) September 16\u201330, 2017, National Hurricane Center."},{"key":"ref_41","unstructured":"R Core Team (2021). R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing. Available online: https:\/\/www.R-project.org\/."},{"key":"ref_42","first-page":"381","article-title":"Wind load estimation on an open-grown European oak tree","volume":"92","author":"Angelou","year":"2019","journal-title":"For. Int. J. For. Res."},{"key":"ref_43","first-page":"444","article-title":"Critical wind speeds suggest wind could be an important disturbance agent in Amazonian forests","volume":"92","author":"Peterson","year":"2019","journal-title":"For. Int. J. For. Res."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1016\/j.ecolmodel.2006.10.013","article-title":"Modeling soil salinity distribution along topographic gradients in tidal salt marshes in Atlantic and Gulf coastal regions","volume":"201","author":"Wang","year":"2007","journal-title":"Ecol. Model."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1016\/j.tpb.2012.02.007","article-title":"Towards a theory of ecotone resilience: Coastal vegetation on a salinity gradient","volume":"82","author":"Jiang","year":"2012","journal-title":"Theor. Popul. Biol."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Chen, Y., and Ye, Y. (2014). Effects of Salinity and Nutrient Addition on Mangrove Excoecaria agallocha. PLoS ONE, 9.","DOI":"10.1371\/journal.pone.0093337"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"397","DOI":"10.1093\/aob\/mcu257","article-title":"Growth responses of the mangrove Avicennia marina to salinity: Development and function of shoot hydraulic systems require saline conditions","volume":"115","author":"Nguyen","year":"2015","journal-title":"Ann. Bot."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/j.ecolmodel.2014.04.001","article-title":"Changes in allometric relations of mangrove trees due to resource availability\u2014A new mechanistic modelling approach","volume":"283","author":"Peters","year":"2014","journal-title":"Ecol. Model."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"365","DOI":"10.2307\/2937116","article-title":"Leaf Life-Span in Relation to Leaf, Plant, and Stand Characteristics among Diverse Ecosystems","volume":"62","author":"Reich","year":"1992","journal-title":"Ecol. Monogr."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1016\/j.ecoleng.2012.12.049","article-title":"The salinity gradient influences on the inundation tolerance thresholds of mangrove forests","volume":"51","author":"Yang","year":"2013","journal-title":"Ecol. Eng."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"303","DOI":"10.1016\/S0378-1127(00)00288-7","article-title":"Integration of component models from the tree, stand and regional levels to assess the risk of wind damage at forest margins","volume":"135","author":"Talkkari","year":"2000","journal-title":"For. Ecol. Manag."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1016\/j.foreco.2018.04.009","article-title":"Structural and functional traits predict short term response of tropical dry forests to a high intensity hurricane","volume":"426","author":"Oyama","year":"2018","journal-title":"For. Ecol. Manag."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1016\/j.envsoft.2015.01.016","article-title":"Comparison and validation of three versions of a forest wind risk model","volume":"68","author":"Hale","year":"2015","journal-title":"Environ. Model. Softw."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"450","DOI":"10.1007\/s003480050370","article-title":"Surface roughness effects in turbulent boundary layers","volume":"27","author":"Krogstadt","year":"1999","journal-title":"Exp. Fluids"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"065007","DOI":"10.1088\/1748-9326\/ab18df","article-title":"Statistical properties of hybrid estimators proposed for GEDI\u2014NASA\u2019s global ecosystem dynamics investigation","volume":"14","author":"Patterson","year":"2019","journal-title":"Environ. Res. Lett."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1016\/j.baae.2018.04.002","article-title":"Effects of vegetation structure and landscape complexity on insect parasitism across an agricultural frontier in Argentina","volume":"29","author":"Yu","year":"2018","journal-title":"Basic Appl. Ecol."},{"key":"ref_57","first-page":"12","article-title":"Beetle Diversity Across Micro-habitats on Lizard Island Group (Great Barrier Reef, Australia)","volume":"60","author":"Mccormack","year":"2021","journal-title":"Zool. Stud."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/6\/1497\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:39:52Z","timestamp":1760135992000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/6\/1497"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,3,20]]},"references-count":57,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2022,3]]}},"alternative-id":["rs14061497"],"URL":"https:\/\/doi.org\/10.3390\/rs14061497","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,3,20]]}}}