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Articles 31 - 41 of 41
Full-Text Articles in Life Sciences
Prediction Of The Probability Of Large Fires In The Sydney Region Of South-Eastern Australia Using Components Of Fire Weather., R A. Bradstock, J S. Cohn, A M. Gill, M Bedward, C Lucas
Prediction Of The Probability Of Large Fires In The Sydney Region Of South-Eastern Australia Using Components Of Fire Weather., R A. Bradstock, J S. Cohn, A M. Gill, M Bedward, C Lucas
Faculty of Science - Papers (Archive)
The probability of large-fire (>= 1000 ha) ignition days, in the Sydney region, was examined using historical records. Relative influences of the ambient and drought components of the Forest Fire Danger Index (FFDI) on large fire ignition probability were explored using Bayesian logistic regression. The preferred models for two areas (Blue Mountains and Central Coast) were composed of the sum of FFDI (Drought Factor, DF = 1) (ambient component) and DF as predictors. Both drought and ambient weather positively affected the chance of large fire ignitions, with large fires more probable on the Central Coast than in the Blue …
U-Pb Zircon Geochronology And Nd Isotopic Signatures Of The Pre-Mesozoic Metamorphic Basement Of The Eastern Peruvian Andes: Growth And Provenance Of A Late Neoproterozoic To Carboniferous Accretionary Orogen On The Northwest Margin Of Gondwana, A Cardona, U G. Cordani, J Ruiz, V A. Valencia, R Armstrong, D Chew, A Nutman, A W. Sanchez
U-Pb Zircon Geochronology And Nd Isotopic Signatures Of The Pre-Mesozoic Metamorphic Basement Of The Eastern Peruvian Andes: Growth And Provenance Of A Late Neoproterozoic To Carboniferous Accretionary Orogen On The Northwest Margin Of Gondwana, A Cardona, U G. Cordani, J Ruiz, V A. Valencia, R Armstrong, D Chew, A Nutman, A W. Sanchez
Faculty of Science - Papers (Archive)
This study integrates U-Pb zircon geochronology (from LAM-ICP-MS, SHRIMP, and TIMS) with Nd isotopic data from orthogneisses and metasedimentary rocks of the pre-Mesozoic basement of the eastern Peruvian Andes to provide new information on the tectonic evolution and Neoproterozoic-Paleozoic paleogeography of this segment of the proto-Andean margin. A high-grade orthogneiss unit yields U-Pb zircon protolith crystallization ages of ~613 Ma. It was metamorphosed and intruded by an Early Ordovician granitoid. Subsequently, two different volcano-sedimentary sequences were laid down and metamorphosed, probably as a consequence of terrane accretion. The older sequence was deposited and metamorphosed between 450 and 420 Ma, and …
Field Guide To The Fishes Of Eastern Washington, Allan T. Scholz, Holly J. Mclellan, Judy Mcmillan, Larry Conboy, Michelle Kirkendall, Angela Davis, Eastern Washington University. Department Of Biology., Eastern Washington University. University Graphics., United States. Bureau Of Land Management.
Field Guide To The Fishes Of Eastern Washington, Allan T. Scholz, Holly J. Mclellan, Judy Mcmillan, Larry Conboy, Michelle Kirkendall, Angela Davis, Eastern Washington University. Department Of Biology., Eastern Washington University. University Graphics., United States. Bureau Of Land Management.
Biology Faculty Publications
"This book was prepared through a grant from the United States Department of the Interior, Bureau of Land Management (BLM)."
Assessment Of Eastern Bristlebird Habitat: Refining Understanding Of Appropriate Habitats For Reintroductions, Jack Baker
Faculty of Science - Papers (Archive)
The cryptic Eastern Bristlebird (Dasyornis brachypterus) is an endangered endemic of south-eastern Australia. Its distribution is highly fragmented with only two populations exceeding 500 individuals. Consequently, recovery planning includes translocation to increase the number of viable populations. The Eastern Bristlebird is typically found in low, dense vegetation. The species occurs in 26 different plant communities throughout its range, which suggests that it might be considered a habitat generalist. However, two studies based on aural surveys have demonstrated that it was conspicuous at heath-wood ecotones. Radiotracking was used to overcome reliance on aural surveys and to investigate the habitat of 12 …
Applying Seed Germination Studies In Fire Management For Biodiversity Conservation In South-Eastern Australia., Tony D. Auld, Mark K.J Ooi
Applying Seed Germination Studies In Fire Management For Biodiversity Conservation In South-Eastern Australia., Tony D. Auld, Mark K.J Ooi
Faculty of Science - Papers (Archive)
We examine the patterns of germination response to fire in the fire-prone flora of the Sydney basin, south-eastern Australia, using examples from several decades of research. The flora shows a strong response to fire-related germination cues. Most species show an interaction between heat and smoke, a number respond only to heat, whilst a few are likely to respond only to smoke. Many recruit in the first 12 months after fire and show no obvious seasonal patterns of recruitment, whilst several species have a strong seasonal germination requirement, even in this essentially aseasonal rainfall region. Key challenges remaining include designing future …
Post-Fire Recovery Of Eastern Bristlebirds (Dasyornis Brachypterus) Is Context-Dependent, D W. Bain, J R. Baker, K O. French, R J. Whelan
Post-Fire Recovery Of Eastern Bristlebirds (Dasyornis Brachypterus) Is Context-Dependent, D W. Bain, J R. Baker, K O. French, R J. Whelan
Faculty of Science - Papers (Archive)
In late December 2003, a wildfire in the Jervis Bay region of New South Wales burned through an area that previously supported a large population of the endangered eastern bristlebird (Dasyornis brachypterus). The eastern bristlebird has been described as fire-sensitive, and fire is implicated in the decline of the species. The frequency of occurrence of bristlebirds was investigated in the second week after the fire in a range of sites varying in fire intensity. Bristlebirds were found in burned habitats but were less common in the sites that were more intensely burnt. Bristlebirds had been surveyed along transects in this …
Spatial And Temporal Patterns Of Abundance And Recruitment Of Ghost Shrimp Trypaea Australiensis Across Hierarchical Scales In South-Eastern Australia, Douglas Rotherham, R. J. West
Spatial And Temporal Patterns Of Abundance And Recruitment Of Ghost Shrimp Trypaea Australiensis Across Hierarchical Scales In South-Eastern Australia, Douglas Rotherham, R. J. West
Faculty of Science - Papers (Archive)
Spatial and temporal variation in abundance and recruitment of burrowing ghost shrimp Trypaea australiensis was examined across 3 south-eastern Australian estuaries using a hierarchical sampling design, over a 2 yr period. We tested the hypothesis that abundances of shrimp were different between plots (10s to 100s of metres apart), sites within estuaries (kilometres apart), estuaries (100s of kilometres apart) and through time. More frequent sampling at 1 site also examined temporal variation at scales of months, seasons and years. Another aim was to investigate the reliability of using counts of burrow openings to indirectly measure the relative abundance of T, …
Thermoregulation By Kangaroos From Mesic And Arid Habitats: Influence Of Temperature On Routes Of Heat Loss In Eastern Grey Kangaroos (Macropus Giganteus) And Red Kangaroos (Macropus Rufus), Terence J. Dawson, Cyntina E. Blaney, Adam J. Munn, Andrew Krockenberger, Shane K. Maloney
Thermoregulation By Kangaroos From Mesic And Arid Habitats: Influence Of Temperature On Routes Of Heat Loss In Eastern Grey Kangaroos (Macropus Giganteus) And Red Kangaroos (Macropus Rufus), Terence J. Dawson, Cyntina E. Blaney, Adam J. Munn, Andrew Krockenberger, Shane K. Maloney
Faculty of Science - Papers (Archive)
We examined thermoregulation in red kangaroos (Macropus rufus) from deserts and in eastern grey kangaroos (Macropus giganteus) from mesic forests/woodlands. Desert kangaroos have complex evaporative heat loss mechanisms, but the relative importance of these mechanisms is unclear. Little is known of the abilities of grey kangaroos. Our detailed study of these kangaroos' thermoregulatory responses at air temperatures (T-a) From -5 degrees to 45 degrees C showed that, while some differences occur, their abilities are fundamentally similar. Both species show the basic marsupial characteristics of relatively low basal metabolism and body temperature (T-b). Within the thermoneutral zone, T-b was 36.3 degrees …
Ventilatory Accommodation Of Oxygen Demand And Respiratory Water Loss In Kangaroos From Mesic And Arid Environments, The Eastern Grey Kangaroo (Macropus Giganteus) And The Red Kangaroo (Macropus Rufus), Terence J. Dawson, Adam J. Munn, Cyntina E. Blaney, Andrew Krockenberger, Shane K. Maloney
Ventilatory Accommodation Of Oxygen Demand And Respiratory Water Loss In Kangaroos From Mesic And Arid Environments, The Eastern Grey Kangaroo (Macropus Giganteus) And The Red Kangaroo (Macropus Rufus), Terence J. Dawson, Adam J. Munn, Cyntina E. Blaney, Andrew Krockenberger, Shane K. Maloney
Faculty of Science - Papers (Archive)
We studied ventilation in kangaroos from mesic and arid environments, the eastern grey kangaroo (Macropus giganteus) and the red kangaroo (Macropus rufus), respectively, within the range of ambient temperatures (T-a) from -5 degrees to 45 degrees C. At thermoneutral temperatures (T-a = 25 degrees C), there were no differences between the species in respiratory frequency, tidal volume, total ventilation, or oxygen extraction. The ventilatory patterns of the kangaroos were markedly different from those predicted from the allometric equation derived for placentals. The kangaroos had low respiratory frequencies and higher tidal volumes, even when adjustment was made for their lower basal …
G99-1377 Tree Squirrels And Their Control, Dallas R. Virchow, Scott E. Hygnstrom, John M. Hobbs
G99-1377 Tree Squirrels And Their Control, Dallas R. Virchow, Scott E. Hygnstrom, John M. Hobbs
University of Nebraska-Lincoln Extension: Historical Materials
This NebGuide describes tree squirrel biology and behavior and characterizes the types of damage they cause. It suggests control methods and equipment and describes legal restrictions.
Tree squirrels are known for their bushy tails and their ability to climb high into trees. The eastern fox squirrel (Sciurus niger) is the most common tree squirrel in Nebraska. It is common throughout the state. The eastern gray squirrel (Sciurus carolinensis) occurs only in the extreme southeastern portion of Nebraska. The southern flying squirrel (Glaucomys volans) occurs uncommonly and only in southeastern Nebraska in the forested Missouri …
G96-1308 Management Of Eastern Redcedar On Grasslands, John Ortmann, James L. Stubbendieck, George Pfeiffer, Robert A. Masters, Walter H. Schacht
G96-1308 Management Of Eastern Redcedar On Grasslands, John Ortmann, James L. Stubbendieck, George Pfeiffer, Robert A. Masters, Walter H. Schacht
University of Nebraska-Lincoln Extension: Historical Materials
Developing an integrated control program including prescribed burning, herbicides, and cutting may be the best way to control eastern redcedar in Nebraska, according to recent research. Eastern redcedar is a serious threat to grassland productivity. Some control methods may be too expensive to use on grasslands, but in many cases, an integrated approach combining fire with more intensive follow-up methods will provide reasonable control at an acceptable cost.