Editing Habitat fragmentation (section)

===Human causes===
Habitat fragmentation is frequently caused by humans when [[native plant]]s are cleared for human activities such as [[agriculture]], [[Subdivision (land)|rural development]], [[urbanization]] and the creation of [[hydroelectric]] reservoirs. Habitats which were once continuous become divided into separate fragments. Due to human activities, many tropical and temperate habitats have already been severely fragmented, and in the near future, the degree of fragmentation will significantly rise.<ref>{{Cite journal |last1=Templeton |first1=Alan R. |last2=Shaw |first2=Kerry |last3=Routman |first3=Eric |last4=Davis |first4=Scott K. |date=1990 |title=The Genetic Consequences of Habitat Fragmentation |url=https://www.jstor.org/stable/2399621 |journal=Annals of the Missouri Botanical Garden |volume=77 |issue=1 |pages=13–27 |doi=10.2307/2399621 |jstor=2399621 |bibcode=1990AnMBG..77...13T |issn=0026-6493}}</ref> After intensive clearing, the separate fragments tend to be very small islands isolated from each other by cropland, pasture, pavement, or even barren land. The latter is often the result of [[slash and burn]] farming in [[tropical forest]]s.  In the wheat belt of central-western [[New South Wales]], [[Australia]], 90% of the native vegetation has been cleared and over 99% of the [[tall grass prairie]] of [[North America]] has been cleared, resulting in extreme habitat fragmentation.