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They plan to continue culling the ravens and currawongs and removing birdlime trees until the dense understorey has been restored and ecological harmony returns to the island.
For much of a plantation rotation, the groundcover of litter and understorey vegetation is continuous and undisturbed, and accelerated hillslope erosion together with off-site nutrient removal is not considered a problem (see also Bormann and Likens 1981).
consideniana, and dominant understorey species include Pomaderris aspera, Acacia dealbata, A.
2]/s around midday, understorey light environments are characterized by low diffuse irradiance, punctuated by sunflecks from a few seconds to minutes (Bazzaz and Picket, 1980; Chazdon et al.
Although pockets of vegetation only experienced a slow burn, the fire burnt through all the undergrowth and 35% of the catchment suffered a 'very high-severity burn' that completely defoliated eucalypts and incinerated the understorey and probably most of the seed stores.
At Ranginui, however, the widespread grass understorey, and associated below-ground C inputs, may have partially counterbalanced soil C loss associated with P.
Left to its own devices the forest takes shape - all understorey of hornbeam sits between the ground carpet of wood, yellow anemones and liverwort and the main canopy of oak, lime and ash.
Several factors control populations of ringtail possum including availability of shelter, density of understorey vegetation, predation (originally mainly by humans, dingoes, spot-tailed quolls, large raptors and large owls, and now mainly by cats, foxes, large raptors and large owls where they occur), fire, food quality and availability, and heat waves.
Patterns of leaf development and herbivory in a tropical understorey community.
The survey team found that most bird species that foraged among canopy foliage, in the air, among the understorey and on the ground had recovered within 22 years of logging.
This blurred boundary from one vegetation type to another is unique in itself; it is characterised by an understorey of rainforest species with a eucalypt canopy (Busby and Brown 1994).
His research revealed the possum flourishes in these fire-disturbed landscapes, commuting from nesting hollows high in the trunks of mature mountain ash trees to feed on sap and insects in surrounding young regrowth forest with a dense understorey of acacias.
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