1997
DOI: 10.1111/j.1442-9993.1997.tb00644.x
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Influence of suburban edges on invasion of Pittosporum undulatum into the bushland of northern Sydney, Australia

Abstract: Suburban edges are shown to exert a major infiuence on invasion ofthe native Pittosporum undulatum Vent, in dry sclerophyll busbland of northern Sydney. Transect data from fifteen urban busbland sites spanning approximately 90 years of development indicate significant increases oi P. undulatum witb time. Basal area, density and frequencies of plants in all size-classes increased significantly witb age of adjoining development. Mean basal area at edges of old sites was 5700 times greater tban in comparable busb… Show more

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Cited by 43 publications
(41 citation statements)
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“…Nutrient enrichment of these bushlands by urban runoff and rubbish dumping improves the habitat for pittosporum (though it may not be recognized as an invasive species where it is within its natural range) (for example, [18]). Lantana (Lantana camara) and two privets (Ligustrum) are exotics that have similar traits to pittosporum and can invade dry bushlands around settlements or rainforests (which contain many species with fleshy fruits) in a similar fashion [14]. Like pittosporum, long distance dispersal of lantana and privet are limited by a scarcity of frugivorous birds in dry eucalypt forests (pers.…”
Section: Traits Of Successful "Invaders" and Properties Of Susceptiblmentioning
confidence: 99%
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“…Nutrient enrichment of these bushlands by urban runoff and rubbish dumping improves the habitat for pittosporum (though it may not be recognized as an invasive species where it is within its natural range) (for example, [18]). Lantana (Lantana camara) and two privets (Ligustrum) are exotics that have similar traits to pittosporum and can invade dry bushlands around settlements or rainforests (which contain many species with fleshy fruits) in a similar fashion [14]. Like pittosporum, long distance dispersal of lantana and privet are limited by a scarcity of frugivorous birds in dry eucalypt forests (pers.…”
Section: Traits Of Successful "Invaders" and Properties Of Susceptiblmentioning
confidence: 99%
“…It slowly invades from the edges of dry bushlands around Sydney where exotic trees and shrubs with similar fruits occur on the urban fringe and attract such birds [14]. Nutrient enrichment of these bushlands by urban runoff and rubbish dumping improves the habitat for pittosporum (though it may not be recognized as an invasive species where it is within its natural range) (for example, [18]).…”
Section: Traits Of Successful "Invaders" and Properties Of Susceptiblmentioning
confidence: 99%
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“…The general trend of an increase in introduced components of natural vege tation accompanied by a decrease in native components has also been greatly assisted by the increasingly extensive explo itation of natural areas, which can alter natural dis turbance regimes and thereby provide enhanced opportuni ties for the colonisation and establishment of introduced plants. Invasive plants have been found to affect ecosystem struc ture and function adversely in habitats throughout the world by reducing native species richness, altering water or fire regimes, changing soil nutrient status and altering geomorphological processes (Macdonald et al 1989, Cronk & Fuller 1995, Rose 1997. A major challenge for in vasive plant research is to develop the ability to predict the invasiveness of species and invasibility of habitats (Ka reiva 1996).…”
Section: Phytogeography and Invasion Spread Of Chromolaena Odorata (Lmentioning
confidence: 99%