University and the Northern Territory government’s weed management branch. Gamba grass Ongoing monitoring as Eradication program conducted, Numbers steady (Andropogon part of integrated weed particularly on the major road Under control within the gayanus) program. networks in the park where park but a large infestations occur as a result of infestation is advancing inadvertent seed transport. towards the park’s Removal of 29 plants from park southern boundary and roadsides. presents a high risk. Infestation of the park via the two major highways continues to be a significant management issue. Mission grass Ongoing monitoring as Treated in a number of strategic Numbers rising (Pennisetum part of integrated weed opportunistic control elsewhere. The distribution of this polystachion) program. species is increasing. Olive The results of the NERP project developed a Numbers rising hymenachne helicopter survey of preliminary rainfall-inundation model The distribution of this (Hymenachne distribution of para grass and commenced models of sea-level species is increasing. amplexicaulis) and olive hymenachne rise for Kakadu floodplains under on the Kakadu climate scenarios. floodplains has been Controlled at a number of key assessed for accuracy. locations; opportunistic control This project is a elsewhere. collaboration between the Kakadu weeds team, Charles Darwin University and the Northern Territory government’s weed management branch. Salvinia Ongoing monitoring as No specific actions. Numbers steady (Salvinia part of integrated weed Extent of infestations molesta) program. varies greatly between locations and over time. Water buffalo Incidental sightings Opportunistic culling (22 buffalo Numbers rising (Bubalus database maintained. shot). bubalis) Feral pig Incidental sightings Opportunistic culling (103 pigs shot). Numbers rising (Sus scrofa) database maintained. Norfolk Island National Park Species Monitoring Actions Trend Black rat Quarterly survey of Predation by rodents is listed as a Numbers rising (Rattus rattus) presence/absence. priority threatening process the Trapping and baiting Norfolk Island Region Threatened program provides an Species Recovery Plan and the indication of Threat Abatement Plan for rodents presence/absence. on islands. More than 1000 bait stations set through the park and baited each month.
University and the Northern Territory government’s weed management branch. Gamba grass (Andropogon gayanus) Ongoing monitoring as part of integrated weed program. Eradication program conducted, particularly on the major road networks in the park where infestations occur as a result of inadvertent seed transport. Removal of 29 plants from park roadsides. Numbers steady Under control within the park but a large infestation is advancing towards the park’s southern boundary and presents a high risk. Infestation of the park via the two major highways continues to be a significant management issue. Mission grass (Pennisetum polystachion) Ongoing monitoring as part of integrated weed program. Treated in a number of strategic opportunistic control elsewhere. Numbers rising The distribution of this species is increasing. Olive hymenachne (Hymenachne amplexicaulis) The results of the helicopter survey of distribution of para grass and olive hymenachne on the Kakadu floodplains has been assessed for accuracy. This project is a collaboration between the Kakadu weeds team, Charles Darwin University and the Northern Territory government’s weed management branch. NERP project developed a preliminary rainfall-inundation model and commenced models of sea-level rise for Kakadu floodplains under climate scenarios. Controlled at a number of key locations; opportunistic control elsewhere. Numbers rising The distribution of this species is increasing. Salvinia (Salvinia molesta) Ongoing monitoring as part of integrated weed program. No specific actions. Numbers steady Extent of infestations varies greatly between locations and over time. Water buffalo (Bubalus bubalis) Incidental sightings database maintained. Opportunistic culling (22 buffalo shot). Numbers rising Feral pig (Sus scrofa) Incidental sightings database maintained. Opportunistic culling (103 pigs shot). Numbers rising Norfolk Island National Park Species Monitoring Actions Trend Black rat (Rattus rattus) Quarterly survey of presence/absence. Trapping and baiting program provides an indication of presence/absence. Predation by rodents is listed as a priority threatening process the Norfolk Island Region Threatened Species Recovery Plan and the Threat Abatement Plan for rodents on islands. More than 1000 bait stations set through the park and baited each month. Numbers rising
director-national-parks-annual-report-2013-14_1.docx