Using topographic attributes to predict the density of vegetation layers in a wet eucalypt forest

2021 ◽  
pp. 1-13
Author(s):  
B. K. V. Yadav ◽  
A. Lucieer ◽  
G. J. Jordan ◽  
S. C. Baker
Keyword(s):  
Eucalypt Forest ◽  
Topographic Attributes

scholarly journals Importance of deep water uptake in tropical eucalypt forest

2016 ◽  
Vol 31 (2) ◽  
pp. 509-519 ◽  
Author(s):  
Mathias Christina ◽  
Yann Nouvellon ◽  
Jean‐Paul Laclau ◽  
Jose L. Stape ◽  
Jean‐Pierre Bouillet ◽  
...  
Keyword(s):  
Water Uptake ◽  
Deep Water ◽  
Eucalypt Forest

Bottom-up delineation of individual trees from full-waveform airborne laser scans in a structurally complex eucalypt forest

2016 ◽  
Vol 173 ◽  
pp. 69-83 ◽  
Author(s):  
Iurii Shendryk ◽  
Mark Broich ◽  
Mirela G. Tulbure ◽  
Sergey V. Alexandrov
Keyword(s):  
Bottom Up ◽  
Eucalypt Forest ◽  
Full Waveform ◽  
Airborne Laser ◽  
Individual Trees

Evidence of late Pleistocene fires and eucalypt forest from a North Queensland humid tropical rainforest site

1990 ◽  
Vol 15 (3) ◽  
pp. 345-347 ◽  
Author(s):  
M. S. HOPKINS ◽  
A. W. GRAHAM ◽  
R. HEWETT ◽  
J. ASH ◽  
J. HEAD
Keyword(s):  
Late Pleistocene ◽  
Tropical Rainforest ◽  
Eucalypt Forest

Spatial prediction of the onset of spruce budworm defoliation

2004 ◽  
Vol 80 (4) ◽  
pp. 485-494 ◽  
Author(s):  
Steen Magnussen ◽  
Paul Boudewyn ◽  
Rene Alfaro
Keyword(s):  
Logistic Regression ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Spatial Prediction ◽  
Spatially Explicit ◽  
Nearest Neighbour ◽  
Single Model ◽  
Stand Volume ◽  
Topographic Attributes ◽  
A Current

A logistic regression model for spatially explicit predictions of the likelihood of an onset of stand-level spruce budworm (Choristoneura fumiferana, Clemens) defoliation in a 15 000 km2 study area in northern British Columbia, Canada is developed. Predictions are derived from stand (volume and needle biomass) and topographic attributes (distance from nearest river, distance from previous year defoliation, and stand elevation) collected during the first 12 years of a current budworm outbreak. The likelihood of an onset of defoliation increased with an increase in stand volume and biomass of current needles and it decreased with an increase in the distance to the nearest river and to the nearest stand with a defoliation recorded for the year prior to the year of prediction. Stands located at higher elevations sustained less defoliation than stands located at lower elevations. A single model is assumed adequate for predictions throughout an entire outbreak cycle. Observed and predicted relative frequencies of locations with an onset of defoliation compared relatively well. Key words: Choristoneura fumiferana; Picea; logistic regression; nearest neighbour distance

Powerline Easements: Do They Promote Edge Effects in Eucalypt Forest for Small Mammals?

1997 ◽  
Vol 24 (6) ◽  
pp. 737 ◽  
Author(s):  
Ross L. Goldingay ◽  
Robert J. Whelan
Keyword(s):  
Small Mammals ◽  
Edge Effects ◽  
Native Species ◽  
Vegetative Cover ◽  
Mammal Species ◽  
Terrestrial Mammals ◽  
Eucalypt Forest ◽  
Hair Sampling ◽  
South Wales ◽  
Antechinus Stuartii

The distribution and abundance of small terrestrial mammals were assessed in forest adjacent to powerline easements at three different sites in New South Wales. At each site, four transects of 300 m length extended into the forest from the edge of the easement. The abundances of two native species (Antechinus stuartii, Rattus fuscipes) did not differ significantly with distance from the easement but abundances differed markedly among sites. Mammals were captured in only one easement where dense vegetation was present. Feral carnivores, which may mediate edge effects on small mammals, were surveyed by using hair-sampling tubes. Cats and dogs were detected only 50–200 m inside the forest. Foxes were not detected by hair-tubes but were observed on two easements. These results suggest that powerline easements may not create edge effects in eucalypt forest for some native mammal species, although further studies are needed to determine the generality of this conclusion. We recommend that easement management should be more benign to native mammals, given the ubiquity of this form of habitat fragmentation. Promotion of dense vegetative cover and habitat linkages within easements could achieve this.

Topographic Attributes Override Impacts of Agronomic Practices on Prokaryotic Community Structure

2021 ◽  
Author(s):  
Mitra Ghotbi ◽  
Ademir Durrer ◽  
Katharina Frindte ◽  
William R. Horwath ◽  
Jorge L. M. Rodrigues ◽  
...  
Keyword(s):  
Community Structure ◽  
Prokaryotic Community ◽  
Agronomic Practices ◽  
Topographic Attributes

Pattern analysis of Scleropyll trees aggregated to different degrees

1970 ◽  
Vol 18 (2) ◽  
pp. 237
Author(s):  
WE Westman ◽  
DJ Anderson
Keyword(s):  
Mathematical Models ◽  
Tree Species ◽  
Pattern Analysis ◽  
New South ◽  
Analysis Data ◽  
Eucalypt Forest ◽  
South Wales ◽  
Sclerophyll Forest ◽  
The One ◽  
Block Sizes

Pattern analysis data are presented for a number of tree species populations sampled from two sites located in dry sclerophyll forest within the Ku-ring-gai Chase park of New South Wales. The distributions proved to be predominantly contagious or random, with regularity occurring only occasionally. Observed variations in the degree of aggregation exhibited by a species were taken into account in interpreting pattern analysis curves. The relation of pattern analysis data to sample quadrat data fitted to known mathematical models is extremely variable, and it is shown that pattern at block sizes other than the one under consideration may suppress the appearance of deviations from randomness at block sizes which do show contagion when sampled with randomly placed quadrats. The possible origins of contagious distributions in eucalypt forest are briefly discussed.

scholarly journals Fire severity and ecosystem resilience – lessons from the Wombat Fire Effects Study (1984-2003)

2012 ◽  
Vol 124 (1) ◽  
pp. 30
Author(s):  
Kevin G. Tolhurst
Keyword(s):  
Prescribed Fire ◽  
Fire Severity ◽  
Fire Effects ◽  
Royal Commission ◽  
Mixed Species ◽  
Terrestrial Mammals ◽  
Low Intensity ◽  
Eucalypt Forest ◽  
Fire Characteristics ◽  
Understorey Plants

The Wombat Fire Effects Study was established to address a number of questions in relation to the effects of repeated low-intensity fires in mixed species eucalypt forest in the foothills of Victoria. This study has now been going for 25 years and has included the study of understorey plants, fuels, bats, terrestrial mammals, reptiles, invertebrates, fungi, birds, soils, tree growth, fire behaviour and weather. This forest system has shown a high resilience to fire that is attributed here to the patchiness and variability in the fire characteristics within a fire and the relatively small proportion of the landscape being affected. A means of comparing the level of “injury” caused by low-intensity prescribed fire with high intensity wildfire is proposed so that the debate about leverage benefits (the reduction in wildfire area compared to the area of planned burning) can be more rational. There are some significant implications for assessing the relative environmental impacts of wildfire compared with the planned burning program being implemented in Victoria since the Victorian Bushfires Royal Commission recommendations (Teague et al. 2010).

scholarly journals Within-Tree Distribution and Survival of the Eucalyptus Longhorned Borer Phoracantha semipunctata (Coleoptera: Cerambycidae) in a Mediterranean-Type Ecosystem

Insects ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 225
Author(s):  
Stephen Seaton ◽  
George Matusick ◽  
Giles Hardy
Keyword(s):  
Larval Development ◽  
Larval Survival ◽  
Severe Drought ◽  
Eucalyptus Marginata ◽  
Phoracantha Semipunctata ◽  
Tree Distribution ◽  
Eucalypt Forest ◽  
Attack Patterns ◽  
Mediterranean Type Ecosystem ◽  
Tree Characteristics

The attack patterns, infestation success and larval development of woodborers within living trees are complex and are largely shaped by host tree characteristics. Following a severe drought in a native eucalypt forest where outbreak densities of a native Australian beetle, the eucalyptus longhorned borer (Phoracantha semipunctata), occurred, a tree dissection study was conducted in Australia. This involved felling 40 trees each of jarrah (Eucalyptus marginata) and marri (Corymbia calophylla) that were cut into 1-m sections and neonate larval galleries, larvae in pupal cells and adult borer emergence were measured and added to give total numbers per tree to determine the within-tree distribution and survival of P. semipunctata. There was a significant impact on larval survival in both species, in contrast, pupal survival remained high. Within-tree distribution of P. semipunctata was directional with borer emergence and incidence of larval galleries both negatively associated with tree section height above the ground and positively associated with section diameter and bark thickness, reaching a maximum towards the base of trees. High incidence and survival in lower thicker tree sections indicate a more conducive environment for larval development, in contrast to poor larval survival in smaller thinner sections at the top of trees. The dependence of larval survival on tree characteristics controlling the within-tree distribution of borer emergence is emphasized, and needs to be considered when estimating the spread of borer populations during outbreaks.

Sign in / Sign up

Export Citation Format

Share Document