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   Cestrum nocturnum (arbuste) English     
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         Impact global

    Cestrum nocturnum is known to aggressively colonise disturbed areas (Meyer, 2004) and is capable of forming dense impenetrable thickets in the undergrowth of some forest systems (Meyer, 2004; Oppeheimer, 2007; Williams, 2008) possibly displacing other plant species and altering natural successional processes. It has been shown to be more suited to capturing and using light than native Hawaiian species in greenhouse conditions (Pattison et al., 1998) with its competitiveness thought to be partly responsible for the possible extinction of the endemic Acalypha wilderi on Rarotonga (McCormack, pers. comm., 2000; in Meyer, 2004). Like all Cestrum species, all parts of C. nocturnum are known to be highly toxic either fresh or when dried (Connor, 1977). As such, C. nocturnum forms a risk to livestock with 120 g (approximately 60 leaves) of Cestrum spp. material enough to result in the death of a 400 kg cattle beast (Environment Bay of Plenty, 2003). In humans, C. nocturnum can cause hay-fever like symptoms (Williams, 2008) and while a non-fatal poisoning of a human child was reported by Connor (1977), no poisonings have been reported since 2002 (Williams, 2008) and there have been no records of any fatal poisonings (Connor, 1977; Williams, 2008).



         Étude de cas sur les impacts
    Rarotonga Is. (Cook Islands) English 
    Compétition: Cestrum nocturnum is thought to be one of the invasive species that competed with the rare endemic Acalypha wilderi, driving it to possible extinction (McCormack, pers. comm., 2000; in Meyer, 2004).

    Réduction de la biodiversité indigène: Cestrum nocturnum is thought to be one of the invasive species that competed with the rare endemic Acalypha wilderi, driving it to possible extinction (McCormack, pers. comm., 2000; in Meyer, 2004).
    Tahiti Is. (French Polynesia) English 
    Modification des modes de succession: Cestrum nocturnum is known as an aggressive coloniser of disturbed areas such as trailsides, forest gaps and landslides in the rainforests of Tahiti up to 900 m elevation (Meyer, 2004).
    Auckland Region (New Zealand) English 
    Agricole: All parts of Cestrum spp. Including Cestrum nocturnum have been reported as poisonous and capable of resulting in the death of livestock (Connor, 1977).

    Économique/Subsistance: All parts of Cestrum spp. Including Cestrum nocturnum have been reported as poisonous and capable of resulting in the death of livestock (Connor, 1977).
    Bay of Plenty Region (New Zealand) English 
    Agricole: All parts of Cestrum spp. Including Cestrum nocturnum have been reported as poisonous and capable of resulting in the death of livestock (Connor, 1977).

    Économique/Subsistance: All parts of Cestrum spp. Including Cestrum nocturnum have been reported as poisonous and capable of resulting in the death of livestock (Connor, 1977).
    Northland Region (New Zealand) English 
    Agricole: All parts of Cestrum spp. Including Cestrum nocturnum have been reported as poisonous and capable of resulting in the death of livestock (Connor, 1977).

    Compétition: Williams (2008) states that Cestrum nocturnum may occupy space which could otherwise be used by native species.

    Économique/Subsistance: All parts of Cestrum spp. Including Cestrum nocturnum have been reported as poisonous and capable of resulting in the death of livestock (Connor, 1977).
    Hawaii (Hawai‘i) Is. (United States (USA)) English 
    Compétition: Cestrum nocturnum appears to be more suited to capturing and using light than native Hawaiian species in greenhouse conditions (Pattison et al., 1998). This was shown to be especially so in high light conditions such as those which could be found in highly disturbed areas (Pattison et al., 1998).
    Kaua`i Is. (United States (USA)) English 
    Compétition: Cestrum nocturnum appears to be more suited to capturing and using light than native Hawaiian species in greenhouse conditions (Pattison et al., 1998). This was shown to be especially so in high light conditions such as those which could be found in highly disturbed areas (Pattison et al., 1998).
    Maui Is. (United States (USA)) English 
    Compétition: Cestrum nocturnum appears to be more suited to capturing and using light than native Hawaiian species in greenhouse conditions (Pattison et al., 1998). This was shown to be especially so in high light conditions such as those which could be found in highly disturbed areas (Pattison et al., 1998).

    Perturbation physique: Observations from Makawao and the Ko‘olau Forest Reserves on East Maui reported the potential for Cestrum nocturnum to form dense thickets in riparian areas (Oppenheimer, 2007)
    Oahu Is. (United States (USA)) English 
    Compétition: Cestrum nocturnum appears to be more suited to capturing and using light than native Hawaiian species in greenhouse conditions (Pattison et al., 1998). This was shown to be especially so in high light conditions such as those which could be found in highly disturbed areas (Pattison et al., 1998).



ISSG Landcare Research NBII IUCN University of Auckland