Editing Cliff (section)

==As habitat ==
Cliff landforms provide unique habitat [[Niche (ecology)|niches]] to a variety of plants and animals, whose preferences and needs are suited by the vertical geometry of this landform type. For example, a number of birds have decided affinities for choosing cliff locations for nesting,<ref>{{Cite web |title=Abiotic factor |url=http://www.eoearth.org/article/Abiotic_factor?topic=49461 |url-status=dead |archive-url=https://web.archive.org/web/20130608071757/http://www.eoearth.org/article/Abiotic_factor?topic=49461 |archive-date=2013-06-08}}</ref> often driven by the defensibility of these locations as well as absence of certain predators.
Humans have also inhabited [[cliff dwelling]]s.

===Flora===
The population of the rare'' [[Borderea chouardii]]'', during 2012, existed only on two cliff habitats within western Europe.<ref>{{cite journal |last1=González   |first1=García  |last2=Begoña   |first2=María  |last3=Espadaler|first3= X |last4=Olesen|first4= Jens M  |editor1=Bente Jessen Graae|date=12 September 2012|title=Extreme Reproduction and Survival of a True Cliffhanger: The Endangered Plant Borderea chouardii (Dioscoreaceae) |journal=PLOS ONE |type= |series= |language= |edition= |publisher=[[Public Library of Science]] |publication-place=digital.csic.es |publication-date= |volume= 7 |issue=9|pages=e44657 |doi=10.1371/journal.pone.0044657 |pmid=22984539 |pmc=3440335|bibcode=2012PLoSO...744657G |hdl=10261/56308 |doi-access=free }}</ref>