Editing Fraxinus quadrangulata (section)

==Conservation status==
As of 2014, blue ash appears to be least threatened in comparison to other North American ash by the infestation of the [[emerald ash borer]].  First detected in North America in 2002, this invasive beetle has since spread throughout much of this tree's range.  Approximately sixty to seventy percent of these trees survive<ref>{{cite journal|last1=Tanis|first1=S. R.|last2=McCullough|first2=D. G.|title=Differential persistence of blue ash and white ash following emerald ash borer invasion|journal=Canadian Journal of Forest Research|date=25 July 2012|volume=42|issue=8|pages=1542–1550|doi=10.1139/x2012-103}}</ref> compared to other ash such as [[Fraxinus nigra|black ash]] and [[Fraxinus pennsylvanica|green ash]] where up to ninety-nine percent of them are killed by emerald ash borer. In 2017, the blue ash, along with other ashes native to the Eastern United States such as the black ash, green ash and [[Fraxinus americana|white ash]] were assessed as Critically Endangered by the [[IUCN]]. This is due to the non-native invasive emerald ash borer's massive population increase across the native habitat of these trees.<ref name="iucn status 12 November 2021" />

In Canada, ''Fraxinus quadrangulata'' is legally protected as a threatened species under the [[Species at Risk Act]].<ref>{{cite web|url=https://species-registry.canada.ca/index-en.html#/species/210-379|title=Blue Ash (Fraxinus quadrangulata)|website=Species at risk public registry|publisher=Government of Canada|date=12 December 2023|access-date=22 May 2024}}</ref>  ''F. quadrangulata'' is found in Ontario and has experienced habitat fragmentation within that portion of its range.  Ongoing threats to this species in Canada may include [[white-tailed deer]] browsing of young trees and emerald ash borer activity, although the impact of these threats is not well defined at present.<ref>{{cite web|url=https://wildlife-species.az.ec.gc.ca/species-risk-registry/virtual_sara/files//cosewic/sr_Blue%20Ash_2014_e.pdf|title=COSEWIC Assessment and Status Report on the Blue Ash ''Fraxinus quadrangulata'' in Canada|author=COSEWIC|publisher=Committee on the Status of Endangered Wildlife in Canada|location=Ottawa|access-date=22 May 2024|year=2014}}</ref>