{"occurrences":[{"area":"ML.251","occurrenceCount":2,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.252","occurrenceCount":33,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.253","occurrenceCount":85,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.254","occurrenceCount":3,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.255","occurrenceCount":2,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.256","occurrenceCount":20,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.257","occurrenceCount":12,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.260","occurrenceCount":3,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.261","occurrenceCount":3,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.263","occurrenceCount":13,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.264","occurrenceCount":1,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.265","occurrenceCount":5,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"},{"area":"ML.266","occurrenceCount":2,"status":"MX.typeOfOccurrenceOccursBasedOnOccurrences"}],"parent":{"phylum":{"cursiveName":false,"vernacularName":"putkilokasvit","scientificName":"Tracheophyta","scientificNameAuthorship":"Sinnott ex Cavalier-Smith","taxonRank":"MX.phylum","id":"MX.53078","hasBold":false},"genus":{"cursiveName":true,"vernacularName":"vaahterat","scientificName":"Acer","scientificNameAuthorship":"L.","taxonRank":"MX.genus","id":"MX.39121","hasBold":false},"species":{"cursiveName":true,"vernacularName":"saarnivaahtera","scientificName":"Acer negundo","scientificNameAuthorship":"L.","taxonRank":"MX.species","id":"MX.40838","bold":{"binCount":0,"publicRecords":33,"specimens":65,"barcodes":11},"hasBold":true},"domain":{"cursiveName":false,"vernacularName":"aitotumaiset","scientificName":"Eucarya","scientificNameAuthorship":"Whittaker & Margulis, 1978","taxonRank":"MX.domain","id":"MX.53761","hasBold":false},"subphylum":{"cursiveName":false,"scientificName":"Spermatophytina","taxonRank":"MX.subphylum","id":"MX.4986645","hasBold":false},"family":{"cursiveName":false,"vernacularName":"saippuamarjakasvit","scientificName":"Sapindaceae","scientificNameAuthorship":"Juss.","taxonRank":"MX.family","id":"MX.289481","hasBold":false},"kingdom":{"cursiveName":false,"vernacularName":"kasvit","scientificName":"Plantae","scientificNameAuthorship":"Haeckel","taxonRank":"MX.kingdom","id":"MX.37601","hasBold":false},"class":{"cursiveName":false,"vernacularName":"koppisiemeniset","scientificName":"Magnoliopsida","scientificNameAuthorship":"Brongn.","taxonRank":"MX.class","id":"MX.4976189","hasBold":false},"order":{"cursiveName":false,"scientificName":"Sapindales","scientificNameAuthorship":"Juss. ex Bercht. & J. Presl","taxonRank":"MX.order","id":"MX.70072","hasBold":false}},"hasLatestRedListEvaluation":true,"scientificName":"Acer negundo","latestRedListStatusFinland":{"year":2019,"status":"MX.iucnNA"},"hasChildren":false,"redListStatusesInFinland":[{"year":2019,"status":"MX.iucnNA"},{"year":2010,"status":"MX.iucnNA"}],"descriptions":[{"speciesCardAuthors":{"variable":"MX.speciesCardAuthors","title":"Kuvaustekstin laatijat","content":"
Eeva-Maria Tuhkanen ja Miia Jauni (Luke) 2023
"},"groups":[{"variables":[{"variable":"MX.descriptionText","title":"Yleiskuvaus","content":"Saarnivaahtera on Pohjois-Amerikasta kotoisin oleva nopeakasvuinen pioneeripuulaji. Se on levinnyt puutarhakäytöstä laajalle, sillä se sietää monenlaisia olosuhteita, kuten kylmää, kosteutta ja tulvia. Kunnolla juurruttuaan se sietää myös kuivuutta paremmin kuin muut vaahteralajit. Saarnivaahtera kasvaa nopeasti ensimmäisen 15-20 elinvuotensa aikana, mutta sen jälkeen kasvunopeus hidastuu. Saarnivaahterat ovat melko lyhytikäisiä puita. Ne elävät keskimäärin 75-vuotiaiksi, harvoin satavuotiaaksi. Laji kasvaa parhaiten pioneerilajin tapaan valoisalla avoimella paikalla, mutta se pärjää myös puolivarjossa. Siementaimet menestyvät paremmin valoisassa ympäristössä kuin varjossa.
\r\nSaarnivaahtera on tuulipölytteinen ja -levintäinen, kaksikotinen puu ja sen emiyksilöt tuottavat runsaasti siemeniä, mikäli lähistöllä on pölyttävä hedeyksilö. Siipipalteiset siemenet leviävät tuulen mukana, mutta niitä kuljettavat myös linnut ja oravat. Leviäminen on kuitenkin melko paikallista, yleensä alle 100 m emopuusta. Saarnivaahtera leviää erityisesti ihmisen häiritsemillä mailla, kuten teiden varsilla ja piha-alueilla. Lisäksi laji lisääntyy kasvullisesti kanto- ja juurivesoista, ja saattaa kasvattaa uusia versoja myös vahingoittuneista juurista.
"},{"variable":"MX.identificationText","title":"Tunnistaminen","content":"Avoimella kasvupaikalla saarnivaahterasta tulee usein monirunkoinen, jopa pensasmainen, ja latvuksesta kupumainen. Varjossa puusta tulee useammin yksirunkoinen ja suorempi. Saarnivaahtera kasvaa 6-10 m korkeaksi, alkuperäisellä levinneisyysalueellaan jopa 20 m korkeaksi. Saarnivaahtera poikkeaa ulkonäöltään muista vaahteralajeista, sillä sen lehdet muistuttavat saarnen lehtiä. Ne ovat päättöparisia, enimmäkseen viisilehdykkäisiä, 15-35 cm pitkiä. Versot ovat aluksi vihreitä ja muuttuvat violetinsävyisiksi toisena vuotena. Syysväri on keltainen. Saarnivaahteran hedepuissa on tiheitä, pienikukkaisia huiskilokukintoja ja emipuissa pitkiä, riippuvia terttumaisia kukintoja. Puu kukkii aikaisin keväällä ennen lehtien tuloa, ja varsinkin hedekukinta voi olla näyttävä. Oksat ovat usein murtumaherkkiä heikkojen haaraliitosten vuoksi.
"}],"title":"Yleistä","group":"MX.SDVG1"},{"variables":[{"variable":"MX.originAndDistributionText","title":"Alkuperä ja yleislevinneisyys","content":"Saarnivaahtera on kotoisin Pohjois-Amerikasta, Guatemalasta Kanadan keskiosiin asti. Lajia on viety puutarha- ja puistopuuksi Eurooppaan, Australiaan, Aasiaan ja Uuteen-Seelantiin, joissa se on levinnyt urbaaneille alueille ja rantavyöhykkeille. Saarnivaahtera on vakiintunut vieraslaji Liettuassa ja Latviassa. Norjassa laji on luokiteltu alhaisen riskin lajiksi, sillä sen leviämisnopeus ja ekologinen haitta ovat olleet vähäisiä. Venäjällä saarnivaahteraa on käytetty metsätaloudessa ja maisemoinnissa, ja se onkin yksi laajemmin levinneitä vieraslajikasveja Venäjällä. Suomessa saarnivaahteraa käytetään jonkin verran viherrakentamisessa, lähinnä Etelä-Suomessa. Laji menestyy Raahen, Oulun ja Tornion seudulle asti. Saarnivaahtera tekee myös Suomessa itämiskelpoista siementä ja leviämistaipumuksesta on havaintoja rakennetussa ympäristössä.
"}],"title":"Levinneisyys","group":"MX.SDVG2"},{"variables":[{"variable":"MX.invasiveEffectText","title":"Haitat","content":"Vaikka saarnivaahtera onkin levinnyt laajalti siellä, minne sitä on viety, merkittäviä haittavaikutuksia ei ole dokumentoitu. Jos laji vakiintuu merkittäväksi osaksi eurooppalaista kosteikkokasvillisuutta, se saattaa muuttaa lajistokoostumusta ja vähentää joidenkin luontaisten lajien esiintymistä. Tiheät saarnivaahterakasvustot pidättävät valoa, ja siten voivat heikentää alla kasvavien kasvien menestymistä ja vähentää lajirunsautta.
\r\nVenäjällä sata vuotta saapumisensa jälkeen saarnivaahtera ei ole osoittautunut täysin invasiiviseksi lajiksi, joka kaikkialla syrjäyttäisi alkuperäisiä kasvilajeja. Myöskin Riikassa ja Kaunasissa tehdyn riskinarvioinnin mukaan saarnivaahteralla on tällä hetkellä vähäinen sosiaalinen, ympäristöllinen ja taloudellinen vaikutus.
\r\nLuontaisissa kasvupaikoissaan rantavyöhykkeillä ja tulva-alueilla saarnivaahtera edistää sedimenttien kertymistä.
"},{"variable":"MX.invasivePreventionMethodsText","title":"Torjuntakeinot","content":"Saarnivaahteran poistossa kaulaaminen on suositeltava keino, koska silloin estetään kanto- ja juurivesojen kasvu. Siementaimet kannattaa poistaa varhaisessa vaiheessa.
"},{"variable":"MX.invasiveCitizenActionsText","title":"Mitä minä voin tehdä?","content":"Tarkkaile ympäristöä ja estä saarnivaahteran leviäminen. Poista siementaimet maanomistajan luvalla. Uusia puuistutuksia suunniteltaessa mieti, voitko saarnivaahteran sijaan käyttää muita puulajeja. Älä istuta saarnivaahteraa herkkien luontoympäristöjen, kuten puronvarsien tai muiden rantojen lähelle. Ilmoita havaintosi saarnivaahterasta vieraslajit.fi-sivustolla.
"}],"title":"Vieraslajitietoa","group":"MX.SDVG13"},{"variables":[{"variable":"MX.miscText","title":"Lisätiedot","content":"\r\nBranquart Etienne, Vanderhoeven Sonia, Van Landuyt Wouter, Van Rossum Fabienne, Verloove Filip. 2012. Acer negundo. Invasive species in Belgium. https://alienplantsbelgium.myspecies.info/content/acer-negundo
\r\nCamenen, E., Porté, A.J. and Benito Garzón, M. 2016. American trees shift their niches when invading Western Europe: evaluating invasion risks in a changing climate. Ecol Evol, 6: 7263-7275. https://doi.org/10.1002/ece3.2376
\r\nMędrzycki, P. 2011. NOBANIS – Invasive Alien Species Fact Sheet – Acer negundo. – From: Online Database of the European Network on Invasive Alien Species – NOBANIS www.nobanis.org.
\r\nMerceron, NR; Lamarque, LJ; (...); Porte, AJ. 2016. Killing it Softly: Girdling as an Efficient Eco-friendly Method to Locally Remove Invasive Acer negundo. Ecological Rest. December 1, 2016 vol. 34 no. 4 297-305. https://doi.org/10.3368/er.34.4.297
\r\nSapanov, M.K., Sizemskaya, M.L. 2021. Ecological Features of the Renewal of the Boxelder Maple in Arid Regions of Russia. Contemp. Probl. Ecol. 14, 785–791. https://doi.org/10.1134/S1995425521070155
\r\nStraigytė, L., Cekstere, G., Laivins, M. & Marozas, V. 2015. The spread, intensity and invasiveness of the Acer negundo in Riga and Kaunas. Dendrobiology 2015, vol. 74: 157-168. http://dx.doi.org/10.12657/denbio.074.016
\r\nVeselkin, D.V., Dubrovin, D.I. & Pustovalova, L.A. 2021. High canopy cover of invasive Acer negundo L. affects ground vegetation taxonomic richness. Sci Rep 11, 20758 (2021). https://doi.org/10.1038/s41598-021-00258-x
"}],"title":"Lisätietoja","group":"MX.SDVG10"}],"id":"default","title":"Laji.fi lajikuvaukset"},{"groups":[{"variables":[{"variable":"MX.originAndDistributionText","title":"Alkuperä ja yleislevinneisyys","content":"Pohjois-Amerikka (USA: useimmat itäiset osavaltiot Kalliovuoriin asti lännessä sekä Arizona, Kalifornia, Nevada ja Utah. Kanada: itäisten ja keskisten provinssien eteläosat). Väli-Amerikka (Guatemala. Meksiko). Vakiintuvana tulokkaana myös muualla Pohjois-Amerikassa ja Euroopassa.
"}],"title":"Levinneisyys","group":"MX.SDVG2"},{"variables":[{"variable":"MX.growthFormAndGrowthHabit","title":"Kasvumuoto","content":"Kausivihanta puu tai pensas.
"},{"variable":"MX.descriptionOrganismSize","title":"Koko","content":"3–15 m.
"}],"title":"Rakenne","group":"MX.SDVG8"}],"id":"LA.159","title":"Pinkka oppimisympäristö: Viheralueiden kasvit - Puuvartiset koristekasvit: koppisiemeniset"},{"groups":[{"variables":[{"variable":"MX.originAndDistributionText","title":"Alkuperä ja yleislevinneisyys","content":"Pohjois-Amerikka (USA: useimmat itäiset osavaltiot Kalliovuoriin asti lännessä sekä Arizona, Kalifornia, Nevada ja Utah. Kanada: itäisten ja keskisten provinssien eteläosat). Väli-Amerikka (Guatemala. Meksiko). Vakiintuvana tulokkaana myös muualla Pohjois-Amerikassa ja Euroopassa.
"}],"title":"Levinneisyys","group":"MX.SDVG2"},{"variables":[{"variable":"MX.growthFormAndGrowthHabit","title":"Kasvumuoto","content":"Kausivihanta puu tai pensas.
"},{"variable":"MX.descriptionOrganismSize","title":"Koko","content":"3–15 m.
"}],"title":"Rakenne","group":"MX.SDVG8"},{"variables":[{"variable":"MX.habitat","title":"Elinympäristö","content":"Meridionaaliset–hemiboreaaliset kosteat metsät, jokien ja järvien rannat.
"}],"title":"Ekologia","group":"MX.SDVG5"},{"variables":[{"variable":"MX.miscText","title":"Lisätiedot","content":"Kumpulan kasvitieteellisessä puutarhassa 19.9.2008 kuvattu kasvi (1992-0060).
"}],"title":"Lisätietoja","group":"MX.SDVG10"}],"id":"LA.189","title":"Pinkka oppimisympäristö: Kasvien talvi - Talvivihreät puutarhakasvit"},{"groups":[{"variables":[{"variable":"MX.descriptionText","title":"Yleiskuvaus","content":"Saarnivaahtera on Suomessa 3-5 m korkeaksi kasvava puu tai pensas. Sen lehtilapa on (3-) 5 (-9) -lehdykkäinen ja päätöparinen. Lehdykät ovat 5-7 cm pitkiä ja mujodoltaan kapeanpuikeita ja pitkäsuippuisia. Päätölehdykkä on usein 3-halkoinen. Sen laita on isohampainen.
Kesäkuussa kukkivaa saarnivaahtera on kaksikotinen. Sen hedekukinto on tiheä huiskilo ja emikukinto on riippuva, pitkä ja terttumainen. Hedelmä on lenninsiivellinen lohkohedelmä eli samara.
"}],"title":"Yleistä","group":"MX.SDVG1"},{"variables":[{"variable":"MX.originAndDistributionText","title":"Alkuperä ja yleislevinneisyys","content":"Pohjois-Amerikka (USA: useimmat itäiset osavaltiot Kalliovuoriin asti lännessä sekä Arizona, Kalifornia, Nevada ja Utah. Kanada: itäisten ja keskisten provinssien eteläosat). Väli-Amerikka (Guatemala. Meksiko). Vakiintuvana tulokkaana myös muualla Pohjois-Amerikassa ja Euroopassa.
"}],"title":"Levinneisyys","group":"MX.SDVG2"},{"variables":[{"variable":"MX.habitat","title":"Elinympäristö","content":"Meridionaaliset–hemiboreaaliset kosteat metsät, jokien ja järvien rannat.
"}],"title":"Ekologia","group":"MX.SDVG5"},{"variables":[{"variable":"MX.economicUseText","title":"Käyttö","content":"Koriste- tai varjostuspuu, puuaines soveltuu puukäsitöihin
"}],"title":"Käyttö","group":"MX.SDVG9"},{"variables":[{"variable":"MX.miscText","title":"Lisätiedot","content":"http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=a841
"}],"title":"Lisätietoja","group":"MX.SDVG10"}],"id":"LA.284","title":"Pinkka oppimisympäristö: Viikin arboretum - Taksonominen kokoelma"},{"groups":[{"variables":[{"variable":"MX.distributionFinland","title":"Levinneisyys Suomessa","content":"An exotic ornamental tree, occasionally an escape of cultivation.
"},{"variable":"MX.originAndDistributionText","title":"Alkuperä ja yleislevinneisyys","content":"North America.
"}],"title":"Levinneisyys","group":"MX.SDVG2"},{"variables":[{"variable":"MX.growthFormAndGrowthHabit","title":"Kasvumuoto","content":"Kausivihanta puu tai pensas.
"},{"variable":"MX.descriptionOrganismSize","title":"Koko","content":"3–15 m.
"},{"variable":"MX.descriptionStem","title":"Varsi","content":"The twigs are green and glabrous.
"},{"variable":"MX.descriptionLeaf","title":"Lehti","content":"The lamina is imparipinnate with (3–)5(–9) leaflets. The leaflets are 5–7 cm long, narrowly ovate and acuminate. The terminal leaflet is often trifid and the margin is coarsely serrate.
"},{"variable":"MX.descriptionFlower","title":"Kukka","content":"The male inflorescence is a dense panicle. The female inflorescence is pendent, long and racemose.
"},{"variable":"MX.descriptionFruitAndSeed","title":"Hedelmä ja siemen","content":"The fruit is a paired samara.
"}],"title":"Rakenne","group":"MX.SDVG8"},{"variables":[{"variable":"MX.reproductionFloweringTime","title":"Kukinta-aika","content":"Flowers in June.
"}],"title":"Elinkaari ja elintavat","group":"MX.SDVG4"},{"variables":[{"variable":"MX.habitat","title":"Elinympäristö","content":"Meridionaaliset–hemiboreaaliset kosteat metsät, jokien ja järvien rannat.
"}],"title":"Ekologia","group":"MX.SDVG5"},{"variables":[{"variable":"MX.miscText","title":"Lisätiedot","content":"Kumpulan kasvitieteellisessä puutarhassa 19.9.2008 kuvattu kasvi (1992-0060).
"}],"title":"Lisätietoja","group":"MX.SDVG10"}],"id":"LA.320","title":"Pinkka oppimisympäristö: Kasvitieteen retkeily Lammille - Lammin biologinen asema, dendropuisto"}],"taxonConceptIds":["taxonid:322307"],"informalTaxonGroups":["MVL.343"],"qname":"MX.40838","id":"MX.40838","scientificNameDisplayName":"Acer negundo","occurrenceCountInvasiveFinland":186,"habitatOccurrenceCounts":[{"habitat":{"fi":"kaatopaikka","sv":"kaatopaikka","en":"kaatopaikka"},"occurrenceCount":5,"id":"kaatopaikka"},{"habitat":{"fi":"puistonreuna","sv":"puistonreuna","en":"puistonreuna"},"occurrenceCount":5,"id":"puistonreuna"},{"habitat":{"fi":"täytemaalla","sv":"täytemaalla","en":"täytemaalla"},"occurrenceCount":3,"id":"täytemaalla"},{"habitat":{"fi":"maakasa varastoalueella","sv":"maakasa varastoalueella","en":"maakasa 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