{"id":"https://openalex.org/W3123049075","doi":"https://doi.org/10.3390/rs13030391","title":"Foliage Biophysical Trait Prediction from Laboratory Spectra in Norway Spruce Is More Affected by Needle Age Than by Site Soil Conditions","display_name":"Foliage Biophysical Trait Prediction from Laboratory Spectra in Norway Spruce Is More Affected by Needle Age Than by Site Soil Conditions","publication_year":2021,"publication_date":"2021-01-23","ids":{"openalex":"https://openalex.org/W3123049075","doi":"https://doi.org/10.3390/rs13030391","mag":"3123049075"},"language":"en","primary_location":{"id":"doi:10.3390/rs13030391","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs13030391","pdf_url":"https://www.mdpi.com/2072-4292/13/3/391/pdf?version=1611585378","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/2072-4292/13/3/391/pdf?version=1611585378","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5006307009","display_name":"Zuzana Lhot\u00e1kov\u00e1","orcid":"https://orcid.org/0000-0003-3060-641X"},"institutions":[{"id":"https://openalex.org/I21250087","display_name":"Charles University","ror":"https://ror.org/024d6js02","country_code":"CZ","type":"education","lineage":["https://openalex.org/I21250087"]}],"countries":["CZ"],"is_corresponding":true,"raw_author_name":"Zuzana Lhot\u00e1kov\u00e1","raw_affiliation_strings":["Faculty of Science, Charles University, 12844 Prague, Czech Republic"],"raw_orcid":"https://orcid.org/0000-0003-3060-641X","affiliations":[{"raw_affiliation_string":"Faculty of Science, Charles University, 12844 Prague, Czech Republic","institution_ids":["https://openalex.org/I21250087"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5023248651","display_name":"Veronika Kopa\u010dkov\u00e1","orcid":"https://orcid.org/0000-0001-9317-5990"},"institutions":[{"id":"https://openalex.org/I4210127297","display_name":"Czech Geological Survey","ror":"https://ror.org/02xz6bf62","country_code":"CZ","type":"funder","lineage":["https://openalex.org/I4210127297"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Veronika Kopa\u010dkov\u00e1-Strnadov\u00e1","raw_affiliation_strings":["Czech Geological Survey, 11821 Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Czech Geological Survey, 11821 Prague, Czech Republic","institution_ids":["https://openalex.org/I4210127297"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5058175852","display_name":"Filip Oulehle","orcid":"https://orcid.org/0000-0003-3592-461X"},"institutions":[{"id":"https://openalex.org/I4210112497","display_name":"Czech Academy of Sciences, Global Change Research Institute","ror":"https://ror.org/01v5hek98","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210112497"]},{"id":"https://openalex.org/I4210127297","display_name":"Czech Geological Survey","ror":"https://ror.org/02xz6bf62","country_code":"CZ","type":"funder","lineage":["https://openalex.org/I4210127297"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Filip Oulehle","raw_affiliation_strings":["Czech Geological Survey, 11821 Prague, Czech Republic","Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Czech Geological Survey, 11821 Prague, Czech Republic","institution_ids":["https://openalex.org/I4210127297"]},{"raw_affiliation_string":"Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic","institution_ids":["https://openalex.org/I4210112497"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5031320865","display_name":"Lucie Homolov\u00e1","orcid":"https://orcid.org/0000-0001-7455-2834"},"institutions":[{"id":"https://openalex.org/I4210112497","display_name":"Czech Academy of Sciences, Global Change Research Institute","ror":"https://ror.org/01v5hek98","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210112497"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Lucie Homolov\u00e1","raw_affiliation_strings":["Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic"],"raw_orcid":"https://orcid.org/0000-0001-7455-2834","affiliations":[{"raw_affiliation_string":"Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic","institution_ids":["https://openalex.org/I4210112497"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053580853","display_name":"Eva Neuwirthov\u00e1","orcid":"https://orcid.org/0000-0001-5613-847X"},"institutions":[{"id":"https://openalex.org/I21250087","display_name":"Charles University","ror":"https://ror.org/024d6js02","country_code":"CZ","type":"education","lineage":["https://openalex.org/I21250087"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Eva Neuwirthov\u00e1","raw_affiliation_strings":["Faculty of Science, Charles University, 12844 Prague, Czech Republic"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculty of Science, Charles University, 12844 Prague, Czech Republic","institution_ids":["https://openalex.org/I21250087"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5083683908","display_name":"Marian \u0160vik","orcid":"https://orcid.org/0000-0001-7976-9645"},"institutions":[{"id":"https://openalex.org/I21449261","display_name":"Masaryk University","ror":"https://ror.org/02j46qs45","country_code":"CZ","type":"education","lineage":["https://openalex.org/I21449261"]},{"id":"https://openalex.org/I4210112497","display_name":"Czech Academy of Sciences, Global Change Research Institute","ror":"https://ror.org/01v5hek98","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210112497"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Marian \u0160vik","raw_affiliation_strings":["Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic","Laboratory on Geoinformatics and Cartography, Department of Geography, Faculty of Science, Masaryk University, 61137 Brno, Czech Republic"],"raw_orcid":"https://orcid.org/0000-0001-7976-9645","affiliations":[{"raw_affiliation_string":"Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic","institution_ids":["https://openalex.org/I4210112497"]},{"raw_affiliation_string":"Laboratory on Geoinformatics and Cartography, Department of Geography, Faculty of Science, Masaryk University, 61137 Brno, Czech Republic","institution_ids":["https://openalex.org/I21449261"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5078264256","display_name":"R\u016f\u017eena Janoutov\u00e1","orcid":"https://orcid.org/0000-0003-1830-7556"},"institutions":[{"id":"https://openalex.org/I4210112497","display_name":"Czech Academy of Sciences, Global Change Research Institute","ror":"https://ror.org/01v5hek98","country_code":"CZ","type":"facility","lineage":["https://openalex.org/I202391551","https://openalex.org/I4210112497"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"R\u016f\u017eena Janoutov\u00e1","raw_affiliation_strings":["Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic"],"raw_orcid":"https://orcid.org/0000-0003-1830-7556","affiliations":[{"raw_affiliation_string":"Global Change Research Institute of the Czech Academy of Sciences, 60300 Brno, Czech Republic","institution_ids":["https://openalex.org/I4210112497"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5088985836","display_name":"Jana Albrechtov\u00e1","orcid":"https://orcid.org/0000-0001-6912-1992"},"institutions":[{"id":"https://openalex.org/I21250087","display_name":"Charles University","ror":"https://ror.org/024d6js02","country_code":"CZ","type":"education","lineage":["https://openalex.org/I21250087"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Jana Albrechtov\u00e1","raw_affiliation_strings":["Faculty of Science, Charles University, 12844 Prague, Czech Republic"],"raw_orcid":"https://orcid.org/0000-0001-6912-1992","affiliations":[{"raw_affiliation_string":"Faculty of Science, Charles University, 12844 Prague, Czech Republic","institution_ids":["https://openalex.org/I21250087"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":8,"corresponding_author_ids":["https://openalex.org/A5006307009"],"corresponding_institution_ids":["https://openalex.org/I21250087"],"apc_list":{"value":2500,"currency":"CHF","value_usd":2707},"apc_paid":{"value":1731,"currency":"EUR","value_usd":1866},"fwci":2.1975,"has_fulltext":true,"cited_by_count":19,"citation_normalized_percentile":{"value":0.86681308,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":95,"max":99},"biblio":{"volume":"13","issue":"3","first_page":"391","last_page":"391"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10111","display_name":"Remote Sensing in Agriculture","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10111","display_name":"Remote Sensing in Agriculture","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10266","display_name":"Plant Water Relations and Carbon Dynamics","score":0.9961000084877014,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10005","display_name":"Ecology and Vegetation Dynamics Studies","score":0.9955999851226807,"subfield":{"id":"https://openalex.org/subfields/2309","display_name":"Nature and Landscape Conservation"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/evergreen","display_name":"Evergreen","score":0.6187012195587158},{"id":"https://openalex.org/keywords/canopy","display_name":"Canopy","score":0.5306453108787537},{"id":"https://openalex.org/keywords/trait","display_name":"Trait","score":0.47788965702056885},{"id":"https://openalex.org/keywords/reflectivity","display_name":"Reflectivity","score":0.464517742395401},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.45684775710105896},{"id":"https://openalex.org/keywords/lignin","display_name":"Lignin","score":0.412632554769516},{"id":"https://openalex.org/keywords/biology","display_name":"Biology","score":0.3901415765285492},{"id":"https://openalex.org/keywords/ecology","display_name":"Ecology","score":0.32519838213920593},{"id":"https://openalex.org/keywords/botany","display_name":"Botany","score":0.2779843211174011}],"concepts":[{"id":"https://openalex.org/C177924670","wikidata":"https://www.wikidata.org/wiki/Q190489","display_name":"Evergreen","level":2,"score":0.6187012195587158},{"id":"https://openalex.org/C101000010","wikidata":"https://www.wikidata.org/wiki/Q5033434","display_name":"Canopy","level":2,"score":0.5306453108787537},{"id":"https://openalex.org/C106934330","wikidata":"https://www.wikidata.org/wiki/Q1971873","display_name":"Trait","level":2,"score":0.47788965702056885},{"id":"https://openalex.org/C108597893","wikidata":"https://www.wikidata.org/wiki/Q663650","display_name":"Reflectivity","level":2,"score":0.464517742395401},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.45684775710105896},{"id":"https://openalex.org/C2781052789","wikidata":"https://www.wikidata.org/wiki/Q184817","display_name":"Lignin","level":2,"score":0.412632554769516},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.3901415765285492},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.32519838213920593},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.2779843211174011},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.3390/rs13030391","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs13030391","pdf_url":"https://www.mdpi.com/2072-4292/13/3/391/pdf?version=1611585378","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:1e55435e2dbc47a197440ea2e254e70f","is_oa":true,"landing_page_url":"https://doaj.org/article/1e55435e2dbc47a197440ea2e254e70f","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Remote Sensing, Vol 13, Iss 3, p 391 (2021)","raw_type":"article"},{"id":"pmh:oai:mdpi.com:/2072-4292/13/3/391/","is_oa":true,"landing_page_url":"https://dx.doi.org/10.3390/rs13030391","pdf_url":null,"source":{"id":"https://openalex.org/S4306400947","display_name":"MDPI (MDPI AG)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210097602","host_organization_name":"Multidisciplinary Digital Publishing Institute (Switzerland)","host_organization_lineage":["https://openalex.org/I4210097602"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Remote Sensing","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.3390/rs13030391","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs13030391","pdf_url":"https://www.mdpi.com/2072-4292/13/3/391/pdf?version=1611585378","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/15","score":0.6800000071525574,"display_name":"Life in Land"}],"awards":[{"id":"https://openalex.org/G2082994898","display_name":null,"funder_award_id":"LM2018123","funder_id":"https://openalex.org/F4320321005","funder_display_name":"Ministerstvo \u0160kolstv\u00ed, Ml\u00e1de\u017ee a T\u011blov\u00fdchovy"},{"id":"https://openalex.org/G2783574440","display_name":null,"funder_award_id":"17-05743S","funder_id":"https://openalex.org/F4320321006","funder_display_name":"Grantov\u00e1 Agentura \u010cesk\u00e9 Republiky"}],"funders":[{"id":"https://openalex.org/F4320309755","display_name":"Univerzita Karlova v Praze","ror":"https://ror.org/024d6js02"},{"id":"https://openalex.org/F4320321005","display_name":"Ministerstvo \u0160kolstv\u00ed, Ml\u00e1de\u017ee a T\u011blov\u00fdchovy","ror":"https://ror.org/037n8p820"},{"id":"https://openalex.org/F4320321006","display_name":"Grantov\u00e1 Agentura \u010cesk\u00e9 Republiky","ror":"https://ror.org/01pv73b02"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W3123049075.pdf","grobid_xml":"https://content.openalex.org/works/W3123049075.grobid-xml"},"referenced_works_count":103,"referenced_works":["https://openalex.org/W9910819","https://openalex.org/W1569449202","https://openalex.org/W1598763153","https://openalex.org/W1681494015","https://openalex.org/W1853173642","https://openalex.org/W1915014321","https://openalex.org/W1966579847","https://openalex.org/W1966675249","https://openalex.org/W1972878094","https://openalex.org/W1977084785","https://openalex.org/W1981017127","https://openalex.org/W1984013872","https://openalex.org/W1985101884","https://openalex.org/W1991887584","https://openalex.org/W1995471416","https://openalex.org/W1996601340","https://openalex.org/W2000852813","https://openalex.org/W2006448900","https://openalex.org/W2010838483","https://openalex.org/W2015639658","https://openalex.org/W2021889809","https://openalex.org/W2028202868","https://openalex.org/W2031831298","https://openalex.org/W2033771952","https://openalex.org/W2036817663","https://openalex.org/W2037753438","https://openalex.org/W2040230155","https://openalex.org/W2045479037","https://openalex.org/W2046112831","https://openalex.org/W2049299109","https://openalex.org/W2053373080","https://openalex.org/W2055433187","https://openalex.org/W2056187304","https://openalex.org/W2057277597","https://openalex.org/W2060783799","https://openalex.org/W2062459439","https://openalex.org/W2073317899","https://openalex.org/W2076018788","https://openalex.org/W2082917714","https://openalex.org/W2091874171","https://openalex.org/W2095197810","https://openalex.org/W2097911224","https://openalex.org/W2105756833","https://openalex.org/W2107363073","https://openalex.org/W2109947953","https://openalex.org/W2114004260","https://openalex.org/W2114648178","https://openalex.org/W2115597201","https://openalex.org/W2121154153","https://openalex.org/W2131175560","https://openalex.org/W2134755017","https://openalex.org/W2136428375","https://openalex.org/W2138597409","https://openalex.org/W2138726936","https://openalex.org/W2141776924","https://openalex.org/W2141974358","https://openalex.org/W2142649963","https://openalex.org/W2168521267","https://openalex.org/W2170671734","https://openalex.org/W2176406297","https://openalex.org/W2257011234","https://openalex.org/W2258657061","https://openalex.org/W2258718742","https://openalex.org/W2347430718","https://openalex.org/W2586813976","https://openalex.org/W2588036647","https://openalex.org/W2589473822","https://openalex.org/W2606228910","https://openalex.org/W2610660139","https://openalex.org/W2738066716","https://openalex.org/W2741017892","https://openalex.org/W2755249989","https://openalex.org/W2759585531","https://openalex.org/W2767180030","https://openalex.org/W2789793009","https://openalex.org/W2792703442","https://openalex.org/W2793366794","https://openalex.org/W2794887530","https://openalex.org/W2806394060","https://openalex.org/W2806474296","https://openalex.org/W2889454097","https://openalex.org/W2892129911","https://openalex.org/W2895173458","https://openalex.org/W2909608652","https://openalex.org/W2911909517","https://openalex.org/W2915459044","https://openalex.org/W2921700452","https://openalex.org/W2949321026","https://openalex.org/W2970583167","https://openalex.org/W2972871014","https://openalex.org/W2993386807","https://openalex.org/W2999273829","https://openalex.org/W3006326089","https://openalex.org/W3007935867","https://openalex.org/W3010037619","https://openalex.org/W3034892065","https://openalex.org/W3036390860","https://openalex.org/W3101163566","https://openalex.org/W4229823169","https://openalex.org/W4249341014","https://openalex.org/W4250721016","https://openalex.org/W6649328448","https://openalex.org/W6649349413"],"related_works":["https://openalex.org/W2179867608","https://openalex.org/W2362712337","https://openalex.org/W2365952856","https://openalex.org/W2292388182","https://openalex.org/W2171342480","https://openalex.org/W1186156579","https://openalex.org/W4386762469","https://openalex.org/W2348809089","https://openalex.org/W2227954997","https://openalex.org/W2545911898"],"abstract_inverted_index":{"Scaling":[0],"leaf-level":[1,47],"optical":[2,21],"signals":[3],"to":[4,31,148,207],"the":[5,33,149],"canopy":[6],"level":[7],"is":[8],"essential":[9],"for":[10,83,89,108,164,230],"airborne":[11],"and":[12,20,78,92,118,183,212],"satellite-based":[13],"forest":[14,56],"monitoring.":[15],"In":[16],"evergreen":[17,231],"trees,":[18],"biophysical":[19,42,67,111,136],"traits":[22,68,112,170,210,225],"may":[23],"change":[24],"as":[25,226],"foliage":[26],"ages.":[27],"This":[28,204],"study":[29,126],"aims":[30],"evaluate":[32],"effect":[34],"of":[35,158],"age":[36,116,121,143,194,201],"in":[37,58,129,134],"Norway":[38,50],"spruce":[39,51],"needle":[40,90,110,115,135,176,193,224,235],"on":[41,45],"trait-prediction":[43],"based":[44],"laboratory":[46],"spectra.":[48],"Mature":[49],"trees":[52],"were":[53,81,94,106,171,196],"sampled":[54],"at":[55],"stands":[57],"ten":[59,125],"headwater":[60],"catchments":[61],"with":[62,173,233],"different":[63],"soil":[64,130,150],"properties.":[65],"Foliage":[66],"(pigments,":[69],"phenolics,":[70,178],"lignin,":[71],"cellulose,":[72],"leaf":[73,179],"mass":[74,180],"per":[75,181],"area,":[76],"water,":[77],"nitrogen":[79],"content)":[80],"assessed":[82],"three":[84],"needle-age":[85,162,208],"classes.":[86],"Complementary":[87],"samples":[88],"reflectance":[91],"transmittance":[93],"measured":[95],"using":[96],"an":[97],"integrating":[98],"sphere.":[99],"Partial":[100],"least":[101],"square":[102],"regression":[103],"(PLSR)":[104],"models":[105,160,187],"constructed":[107],"predicting":[109],"from":[113],"reflectance\u2014separating":[114],"classes":[117,122,195,202],"assessing":[119],"all":[120,165,192],"together.":[123],"The":[124,155,168],"sites":[127],"differed":[128],"properties":[131,139],"rather":[132],"than":[133,199],"traits.":[137,167],"Optical":[138],"consistently":[140],"varied":[141],"among":[142],"classes;":[144],"however,":[145],"variation":[146],"related":[147],"conditions":[151],"was":[152,161],"less":[153],"pronounced.":[154],"predictive":[156],"power":[157],"PLSR":[159,186],"dependent":[163],"studied":[166],"following":[169],"predicted":[172],"moderate":[174],"accuracy:":[175],"pigments,":[177],"area":[182],"water":[184],"content.":[185],"always":[188],"performed":[189],"better":[190],"if":[191],"included":[197],"(rather":[198],"individual":[200],"separately).":[203],"also":[205,222],"applied":[206],"independent":[209],"(water":[211],"lignin).":[213],"Thus,":[214],"we":[215],"recommend":[216],"including":[217],"not":[218],"only":[219],"current":[220],"but":[221],"older":[223],"a":[227],"ground":[228],"truth":[229],"conifers":[232],"long":[234],"lifespan.":[236]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":4},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":3}],"updated_date":"2026-05-21T06:26:12.895304","created_date":"2025-10-10T00:00:00"}
