Статті в журналах з теми "Mountain ecology Victoria"
Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Mountain ecology Victoria.
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Mountain ecology Victoria".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.
1
Morrison, A. D., and A. Reay. "Geochemistry of Ferrar Dolerite sills and dykes at Terra Cotta Mountain, south Victoria Land, Antarctica." Antarctic Science 7, no. 1 (March 1995): 73–85. http://dx.doi.org/10.1017/s0954102095000113.
Повний текст джерелаАнотація:
At Terra Cotta Mountain, in the Taylor Glacier region of south Victoria Land, a 237 m thick Ferrar Dolerite sill is intruded along the unconformity between basement granitoids and overlying Beacon Supergroup sedimentary rocks. Numerous Ferrar Dolerite dykes intrude the Beacon Supergroup and represent later phases of intrusion. Major and trace element data indicate variation both within and between the separate intrusions. Crystal fractionation accounts for much of the geochemical variation between the intrusive events. However, poor correlations between many trace elements require the additional involvement of open system processes. Chromium is decoupled from highly incompatible elements consistent with behaviour predicted for a periodically replenished, tapped and fractionating magma chamber. Large ion lithophile element-enrichment and depletion in Nb, Sr, P and Ti suggests the addition of a crustal component or an enriched mantle source. The trace element characteristics of the Dolerites from Terra Cotta Mountain are similar to those of other Ferrar Group rocks from the central Transantarctic Mountains and north Victoria Land, as well as with the Tasmanian Dolerites. This supports current ideas that the trace element signature of the Ferrar Group is inherited from a uniformly enriched mantle source region.
2
Perchiazzi, Natale, Luigi Folco, and Marcello Mellini. "Volcanic ash bands in the Frontier Mountain and Lichen Hills blue-ice fields, northern Victoria Land." Antarctic Science 11, no. 3 (September 1999): 353–61. http://dx.doi.org/10.1017/s0954102099000449.
Повний текст джерелаАнотація:
Dust bands in the blue-ice of the Frontier Mountain meteorite trap (northern Victoria Land, Antarctica) were previously reported as upthrust basal debris. Four of them have now been sampled at Frontier Mountain and Lichen Hills. The absence of local rocks and sedimentary fragments, the ubiquitous abundant volcanic glass with no evidence for abrasion, the igneous minerals, the chemical compositions of glass and minerals and the bulk chemical compositions indicate that they are volcanic ash bands (tephra) and not glacial debris. Although hardly distinguishable in the field, the different volcanic ash bands are discriminated using mineralogical and chemical data, as well as particle size, abundance and vesicularity of glass. Chronological constraints, particle size and chemical compositions localize the source for the Frontier Mountain and Lichen Hills tephra within the recent activity of the Mount Melbourne Volcanic Province in northern Victoria Land; possible emission centres are the Pleiades (40 ± 50 ka to 3 ± 14 ka) and/or Mount Rittmann (3.97 Ma to present).
3
Lindenmayer, David, and Chris Taylor. "Diversifying Forest Landscape Management—A Case Study of a Shift from Native Forest Logging to Plantations in Australian Wet Forests." Land 11, no. 3 (March 10, 2022): 407. http://dx.doi.org/10.3390/land11030407.
Повний текст джерелаАнотація:
Natural forests have many ecological, economic and other values, and sustaining them is a challenge for policy makers and forest managers. Conventional approaches to forest management such as those based on maximum sustained yield principles disregard fundamental tenets of ecological sustainability and often fail. Here we describe the failure of a highly regulated approach to forest management focused on intensive wood production in the mountain ash forests of Victoria, Australia. Poor past management led to overcutting with timber yields too high to be sustainable and failing to account for uncertainties. Ongoing logging will have negative impacts on biodiversity and water production, alter fire regimes, and generate economic losses. This means there are few options to diversify forest management. The only ecologically and economically viable option is to cease logging mountain ash forests altogether and transition wood production to plantations located elsewhere in the state of Victoria. We outline general lessons for diversifying land management from our case study.
4
Tamaris-Turizo, CE, GA Pinilla-A, CJ Guzmán-Soto, and CE Granados-Martínez. "Assigning functional feeding groups to aquatic arthropods in a Neotropical mountain river." Aquatic Biology 29 (March 12, 2020): 45–57. http://dx.doi.org/10.3354/ab00724.
Повний текст джерелаАнотація:
The importance of aquatic arthropods in the processing of organic matter in fluvial systems is well known, but this topic has been poorly studied in Neotropical rivers. In this research, we studied the composition of functional feeding groups (FFGs) associated with differences in elevation in a tropical river in northern Colombia during the wet and dry seasons. Between 2008 and 2013, we collected benthic arthropods at 3 sites located in the upper (San Lorenzo), intermediate (La Victoria) and lower (Puerto Mosquito) sections of the Gaira River. We found some differences in the gut contents and FFGs of the animals from different sites and between the climatic seasons. The dominant food source at all the sites and during both seasons was fine particulate organic matter (FPOM). At La Victoria, the genera Leptonema, Smicridea and Phylloicus (all belonging to Trichoptera) presented significant differences in the consumption of coarse particulate organic matter (CPOM) between the rainy and dry seasons (p < 0.05). At San Lorenzo, Leptonema had the highest animal tissue consumption value (p < 0.05). A discriminant function analysis based on gut contents suggested that some taxa may have been assigned to the wrong FFGs. We concluded that the diets of the aquatic arthropods in our study tended to present high trophic plasticity. Consequently, our results suggest that Neotropical rivers need to be re-evaluated in terms of traditionally established FFGs, which heretofore have been based on information from other regions of the world, producing incorrect assessments of aquatic systems.
5
Burns, Emma L., David B. Lindenmayer, John Stein, Wade Blanchard, Lachlan McBurney, David Blair, and Sam C. Banks. "Ecosystem assessment of mountain ash forest in the Central Highlands of Victoria, south-eastern Australia." Austral Ecology 40, no. 4 (September 25, 2014): 386–99. http://dx.doi.org/10.1111/aec.12200.
Повний текст джерела
6
Grierson, PF, MA Adams, and PM Attiwill. "Estimates of Carbon Storage in the Aboveground Biomass of Victorias Forests." Australian Journal of Botany 40, no. 5 (1992): 631. http://dx.doi.org/10.1071/bt9920631.
Повний текст джерелаАнотація:
The pool of carbon in the world's forests is of similar magnitude to that in the atmosphere, yet little attention has been given to improving measures of carbon in terrestrial biomass. Much of the critical data for forest biomass on which models of global carbon cycling rely is, in fact, based on the accurate sampling of less than 100 ha of forest. Uncertainties in biomass estimation at the local and regional level may be responsible for much of the current speculation as to unidentified sinks for carbon. We have used a forest inventory (i.e. records of forest volume obtained for harvesting purposes) approach to quantify the biomass of forests in Victoria, Australia. Forests were analysed by type, age and region. Regression equations were developed for the accumulation of biomass with age across all productivity classes for each forest type. The mean carbon density for above-ground components of Victorian native forests is 157 tonnes ha-1 (t ha-1), although forest types range in mean carbon density from 250 to 18 t ha-1. Pinus radiata D. Don plantations in Victoria have a mean carbon density of 91 t ha-1 in the above-ground components. Total carbon stored in above-ground biomass is estimated to be 1.2 X 109 t. Rates of carbon fixation vary with forest age, species and site. Mountain ash (Eucalyptus regnans F. Muell.) forests fix around 9 t of carbon ha-1 annually during the first few years of growth, decreasing to 6 t ha-1 by age 10. Rates of carbon accumulation by other forests are generally less than this and, at the lower end of the range, box-ironbark forests, mallee and woodlands accumulate between 0.5 and 2 t ha-1 year-1. P. radiata plantations in Victoria will accumulate around 7 t carbon ha-1 year-1.
7
Welsh, A. H., D. B. Lindenmayer, C. F. Donnelly, and A. Ruckstuhl. "Use of nest trees by the mountain brushtail possum (Trichosurus caninus) (Phalangeridae : Marsupialia). IV. Transitions between den trees." Wildlife Research 25, no. 6 (1998): 611. http://dx.doi.org/10.1071/wr97080.
Повний текст джерелаАнотація:
Statistical models of the patterns of den-tree choice by the mountain brushtail possum (Trichosurus caninus) at Cambarville in the mountain ash (Eucalyptus regnans) forests of the central highlands of Victoria, south-eastern Australia are presented. These models enable us to predict, for a particular possum, the choice of den tree on the basis of patterns of recent den-tree usage and are required for individual-based simulation studies. The models show that the pattern of den-tree use is more complicated than might have been expected, in the sense that it is animal-specific, and that old animals exhibit more complicated patterns of den-tree choice than young ones.
8
WANG, LIANGMIN, PETER M. ATTIWILL, and MARK A. ADAMS. "Fertilizer impacts on the understorey of a regenerating Mountain Ash (Eucalyptus regnans F. Muell.) forest, Victoria." Austral Ecology 21, no. 4 (December 1996): 459–63. http://dx.doi.org/10.1111/j.1442-9993.1996.tb00632.x.
Повний текст джерела
9
Lindenmayer, DB, A. Welsh, CF Donnelly, and RB Cunningham. "Use of Nest Trees by the Mountain Brushtail Possum (Trichosurus Caninus) (Phalangeridae: Marsupialia). Ii. Characteristics of Occupied Trees." Wildlife Research 23, no. 5 (1996): 531. http://dx.doi.org/10.1071/wr9960531.
Повний текст джерелаАнотація:
The use of den trees by a population of the mountain brushtail possum (Trichosorus caninus) in forests of mountain ash (Eucalyptus regnans) at Cambarville, in the central Highlands of Victoria, is described. Relationships are explored between the use of trees with hollows by 16 radio-tracked T. caninus and a range of measures of the morphological characteristics of the 113 different den trees they occupied. The results of the analyses indicate that the most used trees contained a relatively large number of cavities and were not surrounded by dense vegetation. Male possums were found most frequently in the southern part of the 35-ha study area, and females were found most often in the northern part.
10
Lindenmayer, D. B., J. Dubach, and K. L. Viggers. "Geographic dimorphism in the mountain brushtail possum (Trichosurus caninus): the case for a new species." Australian Journal of Zoology 50, no. 4 (2002): 369. http://dx.doi.org/10.1071/zo01047.
Повний текст джерелаАнотація:
The morphological and genetic characteristics of the mountain brushtail possum (Trichosurus caninus) are described for animals from a range of locations throughout its known geographic distribution in eastern Australia. Although there is considerable variation among populations, unequivocal morphological and genetic differences exist between northern and southern populations of the species. Specimens from southern populations (from Victoria) have a significantly (P < 0.001) larger ear conch, a significantly (P < 0.001) longer pes, and a significantly (P < 0.001) shorter tail than do specimens from northern populations (from New South Wales and Queensland). Animals can be clearly distinguished using a simple index based on these three morphological measures, which are gathered from live animals. North–south dimorphism is strongly supported by patterns in genetic data that show genetic distances of 2.7–3.0% between the southern and northern populations. The combined outcomes of morphological and genetic analyses suggest the existence of two distinct species. We recommend that the northern form, distributed from central New South Wales north to central Queensland, retain the name Trichosurus caninus; the southern form from Victoria is described here as Trichosurus cunninghami, sp. nov. The common names of these new species should be the 'short-eared possum' and the 'mountain brushtail possum', respectively.
11
Lindenmayer, D. B., C. I. MacGregor, R. B. Cunningham, R. D. Incoll, M. Crane, D. Rawlins, and D. R. Michael. "The use of nest boxes by arboreal marsupials in the forests of the Central Highlands of Victoria." Wildlife Research 30, no. 3 (2003): 259. http://dx.doi.org/10.1071/wr02047.
Повний текст джерелаАнотація:
The results are reported of a nest-box study conducted in two locations in the mountain ash (Eucalyptus regnans) forests of the Central Highlands of Victoria (south-eastern Australia) to compare usage of different nest-box designs located at different heights in trees. A total of 96 nest boxes was established using a rigorous experimental design – two regions (Powelltown and Toolangi State Forests), two forest age classes (20-year post-logging regrowth and 60-year fire- and salvage-logging regrowth), two nest-box designs (large boxes with large entrance holes and small boxes with small entrance holes), and two heights at which nest boxes were attached to trees (3 m and 8 m above the ground). The study entailed setting out four nest boxes at each of 24 sites to meet the design criteria. Evidence of occupancy by vertebrates was recorded in a total of 19 of 96 boxes on 11 of 24 sites site during regular inspections over more than three years. Thirteen boxes were used by Leadbeater's possum (Gymnobelideus leadbeateri), six by the mountain brushtail possum (Trichosurus cunninghami) and seven by the common ringtail possum (Pseudocheirus peregrinus). The common ringtail possum and mountain brushtail possum were seen only in high–large boxes but Leadbeater's possum used all but the low–large boxes. There was evidence of spatial dependence in usage patterns, with all four boxes at a given site showing signs of eventually being occupied. Only two nest boxes located in mountain ash forest regenerating after the 1939 wildfires were occupied. Relatively limited use of nest boxes supports concerns about the use of a nest box over large scales and long timeframes as an effective recovery tool for species threatened by the loss and subsequent shortage in the numbers of naturally occurring hollows.
12
Lindenmayer, DB, KL Viggers, RB Cunningham, and CF Donnelly. "Morphological Variation Among Populations of the Mountain Brushtail Possum, Trichosurus-Caninus Ogilby (Phalangeridae, Marsupialia)." Australian Journal of Zoology 43, no. 5 (1995): 449. http://dx.doi.org/10.1071/zo9950449.
Повний текст джерелаАнотація:
The results are described of a study of morphometric variation among populations of the mountain brushtail possum, Trichosurus caninus Ogilby. Trapping surveys were completed at seven sites from southern Victoria to central Queensland. The variables measured from each of the 102 animals captured included head length, skull width, total body length, tail length, pes length, length of the ear conch, body girth, belly girth and the pelage colour. Canonical variate analysis highlighted the existence of a marked separation between populations in Victoria and those in New South Wales and Queensland. The first canonical variate accounted for 89% of the variation between the populations and was dominated by the length of the ear conch, tail length and pes length. There also were differences between the populations for several other morphometric measures including the head and body length. We recorded considerable variation in the fur colour of T. caninus both within and between the populations surveyed. However, no consistent pattern in the geographic variation of fur coloration was evident. We do not know the ecological or evolutionary causes underlying the observed differences in morphological characteristics amongst the populations of T. caninus. Further work is planned to examine the genetic variability of the populations and to assess the taxonomic significance of our findings.
13
Lindenmayer, D. B., R. D. Incoll, R. B. Cunningham, M. L. Pope, C. F. Donnelly, C. I. MacGregor, C. Tribolet, and B. E. Triggs. "Comparison of hairtube types for the detection of mammals." Wildlife Research 26, no. 6 (1999): 745. http://dx.doi.org/10.1071/wr99009.
Повний текст джерелаАнотація:
We compare detection rates of different species of mammals by three types of hairtubes in both the mountain ash forests of the central highlands of Victoria and a range of wet forest types at Tumut in southern New South Wales. The types of hairtubes were a small-diameter PVC pipe, a large-diameter PVC pipe and a newly constructed tapered hair funnel. Data were analysed for brown antechinus (Antechinus stuartii), bush rat (Rattus fuscipes), common wombat (Vombatus ursinus), swamp wallaby (Wallabia bicolor) and common and mountain brushtail possums (Trichosurus vulpecula and T. caninus). The most effective hairtube type (i.e. the one yielding the highest number of detections) varied between species: small hairtubes forR. fuscipes, hair funnels for Trichosurus spp., and large hairtubes for V. ursinus and W. bicolor. For A. stuartii, the most effective hairtube type differed between the two study regions (hair funnels in Victoria and small hairtubes at Tumut). Detection by more than one hairtube type at a given plot was uncommon. Our findings have important implications for field surveys and how data gathered from such studies are interpreted. For example, if the aim of field survey is to detect a wide range of species then several types of hairtubes may need to be deployed.
14
Viggers, K. L., D. B. Lindenmayer, R. B. Cunningham, and C. F. Donnelly. "Estimating body condition in the mountain brushtail possum, Trichosurus caninus." Wildlife Research 25, no. 5 (1998): 499. http://dx.doi.org/10.1071/wr96110.
Повний текст джерелаАнотація:
Two methods of assessing body condition were examined for the mountain brushtail possum, Trichosurus caninus (Ogilby) at a single study site in central Victoria, south-eastern Australia. Condition indices were derived from measures of skeletal size and body mass, and body water composition was determined using isotopic dilution of tritiated water to give an estimate of total body water space. There were significant negative relationships between body water composition and the condition indices for body length, total length and pes length. Body water composition of T. caninus was significantly higher in spring than in winter, and those animals with higher body water composition had lower absolute neutrophil counts and higher urea values. The relative usefulness of the two methods used for estimating body condition in T. caninus is discussed.
15
Loyn, Richard H. "Bird Populations in Successional Forests of Mountain Ash Eucalyptus Regnans in Central Victoria." Emu - Austral Ornithology 85, no. 4 (December 1985): 213–30. http://dx.doi.org/10.1071/mu9850213.
Повний текст джерела
16
Lindenmayer, D. B., A. Welsh, and C. F. Donnelly. "The use of nest trees by the mountain brushtail possum (Trichosurus caninus) (Phalangeridae : Marsupialia). V. Synthesis of studies." Wildlife Research 25, no. 6 (1998): 627. http://dx.doi.org/10.1071/wr97081.
Повний текст джерелаАнотація:
A general synthesis is presented of the key results of a series of studies of den tree use by the mountain brushtail possum (Trichosurus caninus) at Cambarville in the mountain ash (Eucalyptus regnans) forests of the central highlands of Victoria, south-eastern Australia. The project produced a range of unexpected results including (1) the number of den trees used, (2) the extent of den sharing, especially among adult males, (3) the overlap in denning ranges of animals, and (4) the predictability of transitions between den trees. Possible reasons for these findings are outlined. We also discuss the limitations of our study, how it could be improved if it were to be repeated, and some of the important implications of the findings for the management of forests where T. caninus occurs.
17
Lindenmayer, David B., and Jeff T. Wood. "Long-term patterns in the decay, collapse, and abundance of trees with hollows in the mountain ash (Eucalyptus regnans) forests of Victoria, southeastern Australia." Canadian Journal of Forest Research 40, no. 1 (January 2010): 48–54. http://dx.doi.org/10.1139/x09-185.
Повний текст джерелаАнотація:
Large trees with hollows are an important component of stand structural complexity worldwide. Understanding their population dynamics is needed to manage cavity-dependent biota. We quantified long-term rates of collapse of 302 measured trees with hollows in 1939-aged regrowth mountain ash ( Eucalyptus regnans F. Muell.) forest in southeastern Australia. We identified time-dependent dynamics in which the collapse rates of trees slowed from ∼4% annually between 1983 and 1993 to ∼2.2% between 1993 and 2007. Transitions of trees between different decay states (forms) also slowed over time. Nevertheless, during the 24-year period of our study, over half of our marked and measured trees had fallen, but there was no recruitment of new trees with hollows. Under current projections, few trees with hollows will occur on our field sites by ∼2050, although more had been forecast in earlier investigations. Such a paucity of trees with hollows in extensive areas of regrowth mountain ash forests will lead to a shortage of nesting and sheltering sites for cavity-dependent biota. We suggest a short–medium (10- to 100-year) focus on the conservation of old growth and multi-aged stands will be needed to maintain populations of those species strongly associated with trees with hollows in mountain ash forests.
18
Savage, Jeni E., Margaret A. Bradshaw, and Kari N. Bassett. "Marginal marine depositional setting and correlation of the Devonian Sperm Bluff Formation (Taylor Group), southern Victoria Land, Antarctica." Antarctic Science 25, no. 6 (April 16, 2013): 767–90. http://dx.doi.org/10.1017/s0954102013000205.
Повний текст джерелаАнотація:
AbstractAnalysis of conglomerates and sandstones of the Sperm Bluff Formation at the base of the Taylor Group (Devonian) between the Mackay Glacier and Bull Pass provides new insights into the nature of initial coarse-grained deposition on basement along the northern side of the McMurdo sedimentary basin. Six lithofacies are recognized in the Sperm Bluff Formation: conglomerate lithofacies, pebbly sandstone lithofacies, cross-bedded sandstone lithofacies, low-angle cross-stratified sandstone lithofacies, bioturbated sandstone lithofacies and interbedded siltstone/sandstone lithofacies. Sedimentary environments ranged from wave-dominated delta, estuary or lagoon to shoreface and inner shelf. The assemblage is thought to reflect changes in sea level. Rhyolite is the most abundant clast type in the coarse lithofacies, but is unknown in outcrop in southern Victoria Land. The rhyolites correlate in age and geochemistry with Cambrian granites in the basement. Coarse beds also contain numerous quartzite clasts, probably derived from the late Precambrian Skelton Group. Palaeocurrents on Mount Suess indicate a strong unimodal flow to the west, but other sites show polymodal palaeoflow. The Sperm Bluff Formation is correlated with Terra Cotta Siltstone, New Mountain Sandstone and Altar Mountain formations based on the lithology of sandstones and their ichnology. A northward onlap during the Early Devonian is indicated.
19
BROWN, G. W., and J. L. NELSON. "Influence of successional stage of Eucalyptus regnans (mountain ash) on habitat use by reptiles in the Central Highlands, Victoria." Austral Ecology 18, no. 4 (December 1993): 405–17. http://dx.doi.org/10.1111/j.1442-9993.1993.tb00468.x.
Повний текст джерела
20
Viggers, K. L., and D. B. Lindenmayer. "A population study of the mountain brushtail possum (Trichosurus caninus) in the central highlands of Victoria." Australian Journal of Zoology 48, no. 2 (2000): 201. http://dx.doi.org/10.1071/zo99040.
Повний текст джерелаАнотація:
Life-history attributes are described for the mountain brushtail possum (Trichosurus caninus) in mountain ash (Eucalyptus regnans) forest at Cambarville in the central highlands of Victoria, south-eastern Australia. The population was trapped on a regular basis between 1992 and 1995. Population density of T. caninus at Cambarville was high (2.3 animals ha–1). The adult sex ratio was female-biased (1.4 : 1) and the age class structure differed between sexes. There were more adult females than males in very old age classes (those animals assigned to Age Classes 7–9 and exceeding an estimated 10 years of age), whereas there were more males in the young adult cohorts (Age Classes 3 and 4). The breeding season was restricted to March–April, when a single young was produced. A second young was not produced if the first was lost. The survival of young from birth to emergence from the pouch showed strong between-year variation (30–80%). Sex ratios at birth were strongly male-biased (average = 2.6 : 1) but female young were far more likely to survive to advanced back-young stage. Breeding success of females at Cambarville was not influenced by the presence of semi-independent young from a previous year remaining in the natal territory. There was some evidence of senescence in breeding success among females in older age cohorts (Age Classes 7–9) and these animals did not successfully rear young. Many animals were trapped repeatedly at the same place, whereas others ranged over a much wider area (up to 3 ha). There was also considerable overlap between individuals in the spatial location of the areas where they were trapped.
21
Curzio, Pietro, Luigi Folco, Marinella Ada Laurenzi, Marcello Mellini, and Antonio Zeoli. "A tephra chronostratigraphic framework for the Frontier Mountain blue-ice field (northern Victoria Land, Antarctica)." Quaternary Science Reviews 27, no. 5-6 (March 2008): 602–20. http://dx.doi.org/10.1016/j.quascirev.2007.11.017.
Повний текст джерела
22
Mansergh, I. M., and D. J. Scotts. "Winter occurrence of the Mountain Pygmy-possum, Burramys parvus (Broom) (Marsupialia: Burramyidae), on Mt Higginbotham, Victoria." Australian Mammalogy 9, no. 1 (January 1, 1986): 35–42. http://dx.doi.org/10.1071/am86004.
Повний текст джерелаАнотація:
Between June, 1982 and October, 1984 traps were laid in the subnivean space of the optimal breeding habitat of Burramys parvus. Mean trapping success during both the snow-free and post-snow periods was more than 12%. No B. parvus were caught in traps set under the snow; the animals either have long periods of torpor and/or their activity is limited to feeding from their food caches, which are presumably located near to the nest (s). Food caches were similar to those of Burramys in captivity. In only one of 14 buildings located within 100 m of B. parvus habitat on Mt Higginbotham was B. parvus trapped during the snow period. In that building, the University Ski Club Lodge (USCL), where the mean trapping success was 28%, 10 females and 13 males were caught. Most of the females were caught during late October. About 50% of animals had been previously tagged during the snow-free period. During the snow period, the number of adult females moving to the USCL was few (8.1% of previous taggings, compared to adult males, 21%). Males returned to female breeding habitat during the breeding season October-November. These data suggest that the Burramys population is sexually segregated during the nonbreeding season.
23
Spring, Daniel A., Michael Bevers, John OS Kennedy, and Dan Harley. "Economics of a nest-box program for the conservation of an endangered species: a reappraisal." Canadian Journal of Forest Research 31, no. 11 (November 1, 2001): 1992–2003. http://dx.doi.org/10.1139/x01-139.
Повний текст джерелаАнотація:
An optimization model is developed to identify timing and placement strategies for the installation of nest boxes and the harvesting of timber to meet joint timberwildlife objectives. Optimal management regimes are determined on the basis of their impacts on the local abundance of a threatened species and net present value (NPV) and are identified for a range of NPV levels to identify production possibility frontiers for abundance and NPV. We apply the model to a case study focusing on an area of commercially productive mountain ash (Eucalyptus regnans F. Muell.) forest in the Central Highlands region of Victoria, Australia. The species to be conserved is Leadbeater's possum (Gymnobelideus leadbeateri McCoy), which is locally limited by a scarcity of nesting hollows. The modeling is exploratory but indicates that nest boxes may offer a promising population recovery tool if consideration is taken of their placement and areal extent through time.
24
Cary, Geoffrey J., Wade Blanchard, Claire N. Foster, and David B. Lindenmayer. "Effects of altered fire intervals on critical timber production and conservation values." International Journal of Wildland Fire 30, no. 5 (2021): 322. http://dx.doi.org/10.1071/wf20129.
Повний текст джерелаАнотація:
Forests exhibit thresholds in disturbance intervals that influence sustainability of production and natural values including sawlog production, species existence and habitat attributes. Fire is a key disturbance agent in temperate forests and frequency of fire is increasing, threatening sustainability of these forest values. We used mechanistically diverse, theoretical fire interval distributions for mountain ash forest in Victoria, Australia, in the recent past and future to estimate the probability of realising: (i) minimum sawlog harvesting rotation time; (ii) canopy species maturation; and (iii) adequate habitat hollows for fauna. The likelihood of realising fire intervals exceeding these key stand age thresholds diminishes markedly for the future fire regime compared with the recent past. For example, we estimate that only one in five future fire intervals will be sufficiently long (~80 years) to grow sawlogs in this forest type, and that the probability of forests developing adequate habitat hollows (~180 years) could be as low as 0.03 (3% of fire intervals). Therefore, there is a need to rethink where sawlogs can be sourced sustainably, such as from fast-growing plantations that can be harvested and then regrown rapidly, and to reserve large areas of existing 80-year-old forest from timber harvesting.
25
Myartseva, Svetlana N., Enrique Ruiz-Cancino, and Juana Maria Coronado-Blanco. "Aphelinidae (Hymenoptera: Chalcidoidea) in the Mountain Localities of Miquihuana and Victoria, Tamaulipas, Mexico, with Description of a new Species ofEncarsia." Florida Entomologist 96, no. 2 (June 2013): 548–53. http://dx.doi.org/10.1653/024.096.0220.
Повний текст джерела
26
EDWARD, KAREN L., and MARK S. HARVEY. "A review of the Australian millipede genus Atelomastix (Diplopoda: Spirostreptida: Iulomorphidae)." Zootaxa 2371, no. 1 (February 25, 2010): 1. http://dx.doi.org/10.11646/zootaxa.2371.1.1.
Повний текст джерелаАнотація:
A review of the Australian endemic millipede genus Atelomastix reveals the presence of 28 species, including the type species A. albanyensis Attems, A. nigrescens Attems, and 25 new species from Western Australia, as well as A. solitaria Jeekel from Victoria. All species are from the high rainfall zone of southern Australia. The new species are: A. anancita, A. attemsi, A. bamfordi, A. brennani, A. culleni, A. danksi, A. dendritica, A. ellenae, A. flavognatha, A. francesae, A. gibsoni, A. grandis, A. julianneae, A. lengae, A. longbottomi, A. mainae, A. melindae, A. montana, A. poustiei, A. priona, A. psittacina, A. rubricephala, A. sarahae, A. tigrina and A. tumula. Most species are shown to have extremely small distributions and all are classified as short-range endemic species. Most species have been collected at very few locations, occurring in discontinuous habitats such as mountain ranges, islands, granite outcrops, or fragments of wet forest.
27
Mansergh, I. M., and J. Scotts D. "Aspects of the life history and breeding biology of the Mountain Pygmy-possum (Burramys parvus), (Marsupialia: Burramyidae) in alpine Victoria." Australian Mammalogy 13, no. 2 (1990): 179. http://dx.doi.org/10.1071/am90018.
Повний текст джерелаАнотація:
From February 1982 to November 1989, a trapping and captive breeding program was undertaken to examine the life history of the vulnerable Mountain Pygmy-possum (Burramys parvus), the only Australian mammal restricted to the alpine and subalpine region. During the active season (Oct.-Apr.) over 38 000 trapnights in the habitat throughout Victoria yielded over 900 individual B. parvus captured on over 3 800 occasions. Burramys parvus is a polyoestrous species (mean cycle period of 20.3 days) and produces supernumerary young, up to twice the number of available teats (4). In the wild, breeding is highly synchronised to spring and a single litter is carried p.a. (x = 3.6; mode = 4). Whilst B. parvus retains the capacity to produce a second litter, this is a rare event in the wild and would be selected against as there would be insufficient time to obtain fat reserves for hibernation. At birth and independence the sex ratio of the cohort is at parity, yet at any time the sex ratio of the B. parvus population is always biased toward females due to differential survival of the sexes (at breeding I M: 4-6 F). In autumn, females that would survive winter were on average > 12 % heavier than those not retrapped. One female was at least 11 years old whilst the oldest male recorded was 4 years. Burramys parvus is the longest lived small terrestrial mammal known. Aspects of the life histo ry are discussed in the context of adaptions to the alpine environment and are compared to other small mammals in the habitat and in other cold climates, and to other small marsupial diprotodonts.
28
PERKINS, PHILIP D. "A revision of the Australian humicolous and hygropetric water beetle genus Tympanogaster Perkins, and comparative morphology of the Meropathina (Coleoptera: Hydraenidae)." Zootaxa 1346, no. 1 (October 30, 2006): 1. http://dx.doi.org/10.11646/zootaxa.1346.1.1.
Повний текст джерелаАнотація:
The Australian endemic humicolous and hygropetric water beetle genus Tympanogaster Perkins, 1979, is revised, based on the study of 7,280 specimens. The genus is redescribed, and redescriptions are provided for T. cornuta (Janssens), T. costata (Deane), T. deanei Perkins, T. macrognatha (Lea), T. novicia (Blackburn), T. obcordata (Deane), T. schizolabra (Deane), and T. subcostata (Deane). Lectotypes are designated for Ochthebius labratus Deane, 1933, and Ochthebius macrognathus Lea, 1926. Ochthebius labratus Deane, 1933, is synonymized with Ochthebius novicius Blackburn, 1896. Three new subgenera are described: Hygrotympanogaster new subgenus (type species Tympanogaster (Hygrotympanogaster) maureenae new species; Topotympanogaster new subgenus (type species Tympanogaster (Topotympanogaster) crista new species; and Plesiotympanogaster new genus (type species Tympanogaster (Plesiotympanogaster) thayerae new species. Seventy-six new species are described, and keys to the subgenera, species groups, and species are given. High resolution digital images of all primary types are presented (online version in color), and geographic distributions are mapped. Male genitalia, representative spermathecae and representative mouthparts are illustrated. Scanning electron micrographs of external morphological characters of adults and larvae are presented. Selected morphological features of the other members of the subtribe Meropathina, Meropathus Enderlein and Tympallopatrum Perkins, are illustrated and compared with those of Tympanogaster. Species of Tympanogaster are typically found in the relict rainforest patches in eastern Australia. Most species have very limited distributions, and relict rainforest patches often have more than one endemic species. The only species currently known from the arid center of Australia, T. novicia, has the widest distribution pattern, ranging into eastern rainforest patches. There is a fairly close correspondence between subgenera and microhabitat preferences. Members of Tympanogaster (s. str.) live in the splash zone, usually on stream boulders, or on bedrock stream margins. The majority of T. (Hygrotympanogaster) species live in the hygropetric zone at the margins of waterfalls, or on steep rockfaces where water is continually trickling; a few rare species have been collected from moss in Nothofagus rainforests. Species of T. (Plesiotympanogaster) have been found in both hygropetric microhabitats and in streamside moss. The exact microhabitats of T. (Topotympanogaster) are unknown, but the morphology of most species suggests non-aquatic habits; most specimens have been collected in humicolous microhabitats, by sifting rainforest debris, or were taken in flight intercept traps. Larvae of hygropetric species are often collected with adults. These larvae have tube-like, dorsally positioned, mesothoracic spiracles that allow the larvae to breathe while under a thin film of water. The key morphological differences between larvae of Tympanogaster (s. str.) and those of Tympanogaster (Hygrotympanogaster) are illustrated. New species of Tympanogaster are: T. (s. str.) aldinga (New South Wales, Dorrigo National Park, Rosewood Creek), T. (s. str.) amaroo (New South Wales, Back Creek, downstream of Moffatt Falls), T. (s. str.) ambigua (Queensland, Cairns), T. (Hygrotympanogaster) arcuata (New South Wales, Kara Creek, 13 km NEbyE of Jindabyne), T. (Hygrotympanogaster) atroargenta (Victoria, Possum Hollow falls, West branch Tarwin River, 5.6 km SSW Allambee), T. (Hygrotympanogaster) barronensis (Queensland, Barron Falls, Kuranda), T. (s. str.) bluensis (New South Wales, Blue Mountains), T. (Hygrotympanogaster) bondi (New South Wales, Bondi Heights), T. (Hygrotympanogaster) bryosa (New South Wales, New England National Park), T. (Hygrotympanogaster) buffalo (Victoria, Mount Buffalo National Park), T. (Hygrotympanogaster) canobolas (New South Wales, Mount Canobolas Park), T. (s. str.) cardwellensis (Queensland, Cardwell Range, Goddard Creek), T. (Hygrotympanogaster) cascadensis (New South Wales, Cascades Campsite, on Tuross River), T. (Hygrotympanogaster) clandestina (Victoria, Grampians National Park, Golton Gorge, 7.0 km W Dadswells Bridge), T. (Hygrotympanogaster) clypeata (Victoria, Grampians National Park, Golton Gorge, 7.0 km W Dadswells Bridge), T. (s. str.) cooloogatta (New South Wales, New England National Park, Five Day Creek), T. (Hygrotympanogaster) coopacambra (Victoria, Beehive Falls, ~2 km E of Cann Valley Highway on 'WB Line'), T. (Topotympanogaster) crista (Queensland, Mount Cleveland summit), T. (Hygrotympanogaster) cudgee (New South Wales, New England National Park, 0.8 km S of Pk. Gate), T. (s. str.) cunninghamensis (Queensland, Main Range National Park, Cunningham's Gap, Gap Creek), T. (s. str.) darlingtoni (New South Wales, Barrington Tops), T. (Hygrotympanogaster) decepta (Victoria, Mount Buffalo National Park), T. (s. str.) dingabledinga (New South Wales, Dorrigo National Park, Rosewood Creek, upstream from Coachwood Falls), T. (s. str.) dorrigoensis (New South Wales, Dorrigo National Park, Rosewood Creek, upstream from Coachwood Falls), T. (Topotympanogaster) dorsa (Queensland, Windin Falls, NW Mount Bartle-Frere), T. (Hygrotympanogaster) duobifida (Victoria, 0.25 km E Binns, Hill Junction, adjacent to Jeeralang West Road, 4.0 km S Jeerelang), T. (s. str.) eungella (Queensland, Finch Hatton Gorge), T. (Topotympanogaster) finniganensis (Queensland, Mount Finnigan summit), T. (s. str.) foveova (New South Wales, Border Ranges National Park, Brindle Creek), T. (Hygrotympanogaster) grampians (Victoria, Grampians National Park, Epacris Falls, 2.5 km WNW Halls Gap), T. (Hygrotympanogaster) gushi (New South Wales, Mount Canobolas Park), T. (s. str.) hypipamee (Queensland, Mount Hypipamee National Park, Barron River headwaters below Dinner Falls), T. (s. str.) illawarra (New South Wales, Macquarie Rivulet Falls, near Wollongong), T. (Topotympanogaster) intricata (Queensland, Mossman Bluff Track, 5–10 km W Mossman), T. (s. str.) jaechi (Queensland, Running Creek, along road between Mount Chinghee National Park and Border Ranges National Park), T. (Topotympanogaster) juga (Queensland, Mount Lewis summit), T. kuranda (Queensland, Barron Falls, Kuranda), T. (s. str.) lamingtonensis (Queensland, Lamington National Park, Lightening Creek), T. (s. str.) magarra (New South Wales, Border Ranges National Park, Brindle Creek), T. (Hygrotympanogaster) maureenae (New South Wales, Back Creek, Moffatt Falls, ca. 5 km W New England National Park boundary), T. (Hygrotympanogaster) megamorpha (Victoria, Possum Hollow falls, W br. Tarwin River, 5.6 km SSW Allambee), T. (Hygrotympanogaster) merrijig (Victoria, Merrijig), T. (s. str.) millaamillaa (Queensland, Millaa Millaa), T. modulatrix (Victoria, Talbot Creek at Thomson Valley Road, 4.25 km WSW Beardmore), T. (Topotympanogaster) monteithi (Queensland, Mount Bartle Frere), T. moondarra (New South Wales, Border Ranges National Park, Brindle Creek), T. (s. str.) mysteriosa (Queensland), T. (Hygrotympanogaster) nargun (Victoria, Deadcock Den, on Den of Nargun Creek, Mitchell River National Park), T. (Hygrotympanogaster) newtoni (Victoria, Mount Buffalo National Park), T. (s. str.) ovipennis (New South Wales, Dorrigo National Park, Rosewood Creek, upstream from Coachwood Falls), T. (s. str.) pagetae (New South Wales, Back Creek, downstream of Moffatt Falls), T. (Topotympanogaster) parallela (Queensland, Mossman Bluff Track, 5–10 km W Mossman), T. (s. str.) perpendicula (Queensland, Mossman Bluff Track, 5–10 km W Mossman), T. plana (Queensland, Cape Tribulation), T. (Hygrotympanogaster) porchi (Victoria, Tarra-Bulga National Park, Tarra Valley Road, 1.5 km SE Tarra Falls), T. (s. str.) precariosa (New South Wales, Leycester Creek, 4 km. S of Border Ranges National Park), T. (s. str.) protecta (New South Wales, Leycester Creek, 4 km. S of Border Ranges National Park), T. (Hygrotympanogaster) punctata (Victoria, Mount Buffalo National Park, Eurobin Creek), T. (s. str.) ravenshoensis (Queensland, Ravenshoe State Forest, Charmillan Creek, 12 km SE Ravenshoe), T. (s. str.) robinae (New South Wales, Back Creek, downstream of Moffatt Falls), T. (s. str.) serrata (Queensland, Natural Bridge National Park, Cave Creek), T. (Hygrotympanogaster) spicerensis (Queensland, Spicer’s Peak summit), T. (Hygrotympanogaster) storeyi (Queensland, Windsor Tableland), T. (Topotympanogaster) summa (Queensland, Mount Elliott summit), T. (Hygrotympanogaster) tabula (New South Wales, Mount Canobolas Park), T. (Hygrotympanogaster) tallawarra (New South Wales, Dorrigo National Park, Rosewood Creek, Cedar Falls), T. (s. str.) tenax (New South Wales, Salisbury), T. (Plesiotympanogaster) thayerae (Tasmania, Liffey Forest Reserve at Liffey River), T. (s. str.) tora (Queensland, Palmerston National Park), T. trilineata (New South Wales, Sydney), T. (Hygrotympanogaster) truncata (Queensland, Tambourine Mountain), T. (s. str.) volata (Queensland, Palmerston National Park, Learmouth Creek, ca. 14 km SE Millaa Millaa), T. (Hygrotympanogaster) wahroonga (New South Wales, Wahroonga), T. (s. str.) wattsi (New South Wales, Blicks River near Dundurrabin), T. (s. str.) weiri (New South Wales, Allyn River, Chichester State Forest), T. (s. str.) wooloomgabba (New South Wales, New England National Park, Five Day Creek).
29
Lindenmayer, D. B., C. MacGregor, and P. Gibbons. "Comment Economics of a nest-box program for the conservation of an endangered species: a re-appraisal." Canadian Journal of Forest Research 32, no. 12 (December 1, 2002): 2244–47. http://dx.doi.org/10.1139/x02-142.
Повний текст джерелаАнотація:
Spring et al. (D.A. Spring, M. Bevers, J.O.S. Kennedy, and D. Harley. 2001. Can. J. For. Res. 31: 19922003) recently published a paper on the economics of a nest-box program for the endangered arboreal marsupial, Leadbeater's possum (Gymnobelideus leadbeateri) in southeastern Australian forests. While their paper is a useful one, there are some important limitations of nest-box programs that need to be highlighted. In the case of Leadbeater's possum, we have undertaken extensive nest-box studies in Victoria mountain ash (Eucalyptus regnans F. Muell.) forests, where the vast majority of populations of the species now occur. Although large numbers of nest boxes have been deployed, very few have actually been occupied, which is a major problem since the effectiveness of any nest-box program will depend on patterns of use by the target species. Given very low levels of nest-box occupancy, harvesting regimes such as those that lead to on-site tree retention are needed to better conserve hollow-dependent species like Leadbeater's possum. Moreover, the need for nest boxes in the first place indicates that logging practices are presently not ecologically sustainable, and modified forestry practices need to be adopted.
30
Hufschmid, J., K. A. Handasyde, and I. Beveridge. "The role of host and environmental factors in the epidemiology of rumpwear in brushtail possums." Australian Journal of Zoology 58, no. 4 (2010): 250. http://dx.doi.org/10.1071/zo10030.
Повний текст джерелаАнотація:
Rumpwear is a common, but poorly defined and understood disease of brushtail possums (Trichosurus spp.) in Australia and New Zealand, resulting in varying degrees of fur loss. Populations of Trichosurus cunninghami (mountain brushtail possum) and T. vulpecula (common brushtail possum) were studied over two years at Boho South (Victoria), to describe the disease, investigate its prevalence and explore its epidemiology. The main type of lesion observed was coat damage in the lumbo-sacral region, and increased severity of rumpwear was related to decreased coat length and increased hair breakage. Significant skin lesions were rare and hair breakage patterns suggested mechanical damage. Rumpwear was very prevalent in both T. cunninghami and T. vulpecula, but very severe rumpwear was rare. There was no true seasonal pattern to the prevalence of rumpwear in T. cunninghami and sex and habitat did not affect prevalence or severity. Prevalence and severity of rumpwear did, however, increase with age. There were no significant relationships between the number of previous captures or body condition index with rumpwear.
31
Lindenmayer, DB, and RA Meggs. "Use of Den Trees by Leadbeater's Possum (Gymnobelideus Leadbeateri)." Australian Journal of Zoology 44, no. 6 (1996): 625. http://dx.doi.org/10.1071/zo9960625.
Повний текст джерелаАнотація:
The results of a radio-tracking study of the uses of den trees by Leadbeater's possum (Gymnobelideus leadbeateri McCoy) at Cambarville in the mountain ash (Eucalyptus regnans) forests of the Central Highlands of Victoria, south-eastern Australia, are described. Animals were radio-tracked for three periods of 5-20 days in July 1990, November 1990 and July 1991. A total of 14 individuals was tracked and they occupied 11 different trees with hollows on the 10-ha study site. Preliminary findings showed that some animals moved between hollows in different trees, and most animals used two or more trees. The distances between utilised trees usually exceeded 50 m. Possible reasons for the den-swapping behaviour include attempts to either or both relieve burdens of ecto-parasites and to reduce the risk of predation. There were several examples, in each of the three radio-tracking periods, of two or more radio-collared adult breeding female animals simultaneously co-occupying the same nest tree. This result was different from some of the general findings of an earlier study of G. leadbeateri at Cambarville.
32
HENDRICH, LARS, and CHRIS H. S. WATTS. "Taxonomic revision of the Australian predaceous water beetle genus Carabhydrus Watts, 1978 (Col. Dytiscidae, Hydroporinae, Hydroporini)." Zootaxa 2048, no. 1 (March 23, 2009): 1–30. http://dx.doi.org/10.11646/zootaxa.2048.1.1.
Повний текст джерелаАнотація:
The present paper treats with the enigmatic Australian predaceous water beetle genus Carabhydrus Watts, 1978 (Dytiscidae, Hydroporinae, Hydroporini) which—except C. stephanieae Watts, Hancock & Leys, 2007—is distributed in forest streams and rivers along the Great Dividing Range of the East Coast and the mountain ranges of SE Australia and Tasmania. The largest species of the genus, Carabhydrus innae sp.n. from southern Victoria and New South Wales, and the smallest, C. storeyi sp.n. from north-eastern Queensland, C. janmillerae sp.n. from south-eastern and C. turaki sp.n. from north-eastern New South Wales are described as new. All species, except C. mubboonus Larson & Storey, 1994, C. niger Watts, 1978 and C. andreas Zwick, 1981, are very rarely collected and mainly known from a few specimens from their type localities. The adults of most species can be found under pebbles and stones and among roots at the edge of running waters, only C. stephanieae has been described from ground water. A key to the ten described species of Carabhydrus is presented, and their distribution and habitats are briefly illustrated.
33
Fairman, Thomas A. "Mountain Ash: Fire, Logging and the Future of Victoria's Giant Forests D. Lindenmayer, D. Blair, L. McBurney and S. Banks. CSIRO Publishing, Clayton South, Victoria, 2015. xxii + 173 pp. Price $59.95 (paperback). ISBN 9781486304974 (also available as Eboo." Austral Ecology 42, no. 8 (November 28, 2017): e18-e19. http://dx.doi.org/10.1111/aec.12480.
Повний текст джерела
34
Mansergh, I., B. Baxter, D. Scotts, T. Brady, and D. Jolley. "Diet of the Mountain Pygmy-possum, Burramys parvus (Marsupialia: Burramyidae) and other small mamma ls in the alpine environment at Mt Higginbotham, Victoria." Australian Mammalogy 13, no. 2 (1990): 167. http://dx.doi.org/10.1071/am90017.
Повний текст джерелаАнотація:
The diets of Burramys parvus, Rattus fuscipes and Antechinus swainsonii in Podocarpus lawrencei heathland in alpine Victoria during the non-winter period were determined from analysis of 264 faecal pellets. Both frequency of occurrence and mean percentage composition of dietary items in the samples were determined; the Iatter being used to assess the diet. We found B. parvus to be an omnivore concentrating on insec ts. It eats a variety of foods but the Bogong Moth (Agrolis infusa) is heavily exploited (31 % of the composition of faecal samples) especially by females during the breeding season (46 %). Other components of the diet are other invertebrates, predominantly insects (32 %) and vegetative material (16 %). Seasonal differences in the composition of the diet of B. parvus were due to the exploitation of fruit in the non-breeding season. No differences in diet were observed between age-classes and the sexes but females are sedentary in food resource-rich habitats, whilst when not breeding, males occur in areas of poorer food resources. Circumstantial evidence suggests that during facultative hibernation a major dietary component of B. parvus may be seeds, cached from the previous summer-autumn. The diet of R. fuscipes consists mainly of insects (12 %) and the largest vegetative component was seeds (10.1 %). Fungi were found in 53 % of faecal samples of R. fuscipes but could not be quantified as a percentage composition of diet. The species is classified as a selective omnivore. The diet of A. swainsonii consisted of 68 % in sec ts, 10.4 % of insect setae and worms with the major vegetative component (5.2 %) being soft fruits. Burramys parvus, relative to the other small mammals with which it cohabits, has become a specialist in exploiting the abundant and rich food resource of Bogong moths.
35
Lindenmayer, DB, A. Welsh, CF Donelley, and RA Meggs. "Use of Nest Trees by the Mountain Brushtail Possum (Trichosurus Caninus) (Phalangeridae: Marsupialia). I. Number of Occupied Trees and Frequency of Tree Use." Wildlife Research 23, no. 3 (1996): 343. http://dx.doi.org/10.1071/wr9960343.
Повний текст джерелаАнотація:
A study was made of the use of trees with hollows by 10 adult male and 6 adult female mountain brushtail possums (Trichosurus caninus) at a 35-ha site in central Victoria, south-eastern Australia. Radio-tracking was used to identify which trees were being used as den sites by animals during an 18-month period between September 1990 and March 1992. Analyses of the data showed that, although 113 different trees were used by the 16 animals, most were occupied infrequently. The total number of trees used by a given animal ranged from 5 to 23. However, the majority of individuals spent most of their time denning in 1-3 trees. Of the 113 den trees, 70 were found to have been used by only 1 animal, 54 trees were used exclusively by males, and 28 trees by females only. Twelve trees were used extensively (on >40 occasions) but only 1 was used extensively by both sexes. Most of the T. caninus radio-tracked typically used 2 or more nest trees per week, indicating that animals moved frequently between den sites. Some animals used up to 6 different trees per week. Some possible reasons for this behaviour in T. caninus are discussed.
36
Lindenmayer, DB, RB Cunningham, MT Tanton, AP Smith, and HA Nix. "Habitat Requirements of the Mountain Brushtail Possum and the Greater Glider in the Montane Ash-Type Eucalypt Forests of the Central Highlands of Victoria." Wildlife Research 17, no. 5 (1990): 467. http://dx.doi.org/10.1071/wr9900467.
Повний текст джерела
37
King, H. G. R. "Adventure in Victoria Land - The loneliest mountain. Lincoln Hall. 1989. Brookvale, NSW, Simon & SchusterAustralia. 232p, illustrated, hard cover. ISBN 0-7318-0051-6. £19.95." Polar Record 26, no. 157 (April 1990): 130. http://dx.doi.org/10.1017/s0032247400011232.
Повний текст джерела
38
Cadiz, Geofe O., Jane G. Cawson, Trent D. Penman, Alan York, and Thomas J. Duff. "Environmental factors associated with the abundance of forest wiregrass (Tetrarrhena juncea), a flammable understorey grass in productive forests." Australian Journal of Botany 68, no. 1 (2020): 37. http://dx.doi.org/10.1071/bt19112.
Повний текст джерелаАнотація:
When flammable plant species become dominant they can influence the flammability of the entire vegetation community. Therefore, it is important to understand the environmental factors affecting the abundance of such species. These factors can include disturbances such as fire, which can promote the dominance of flammable grasses causing a positive feedback of flammability (grass–fire cycle). We examined the potential factors influencing the abundance of a flammable grass found in the understoreys of forests in south-east Australia, the forest wiregrass (Tetrarrhena juncea R.Br.). When wiregrass is abundant, its structural characteristics can increase the risk of wildfire ignition and causes fire to burn more intensely. We measured the cover of wiregrass in 126 sites in mountain ash forests in Victoria, Australia. Generalised additive models were developed to predict cover using climatic and site factors. The best models were selected using an information theoretic approach. The statistically significant factors associated with wiregrass cover were annual precipitation, canopy cover, disturbance type, net solar radiation, precipitation seasonality and time since disturbance. Canopy cover and net solar radiation were the top contributors in explaining wiregrass cover variability. Wiregrass cover was predicted to be high in recently disturbed areas where canopy cover was sparse, light levels high and precipitation low. Our findings suggest that in areas with wiregrass, disturbances such as fire that reduce canopy cover can promote wiregrass dominance, which may, in turn, increase forest flammability.
39
Lindenmayer, DB, K. Ritman, RB Cunningham, JBD Smith, and D. Horvath. "A method for predicting the spatial distribution of arboreal marsupials." Wildlife Research 22, no. 4 (1995): 445. http://dx.doi.org/10.1071/wr9950445.
Повний текст джерелаАнотація:
A method is described for predicting the spatial distribution of arboreal marsupials. The approach is demonstrated using a statistical habitat association model for the greater glider (Petauroides volans), developed in the mountain ash (Eucalyptus regnans) forests of the central highlands of Victoria. The method is applied to predict the spatial distribution of P. volans in the Ada Forest Block, using forestinventory data on the values of the two significant variables in the statistical model (the age of a stand of forest and the abundance of large trees with hollows in a 3-ha area). The application of the model enabled values for the estimated probability of occurrence of P, volans (with a 95% confidence interval) to be generated for each of approximately 2200 3-ha pixels in the Ada Forest Block. A kernel smoothing procedure was then applied to allow for the spatial dependence implicit in these data. The standard measures of statistical uncertainty employed in our analysis revealed substantial variation in the predicted probability of occurrence of P. volans, even though the terms in the statistical relationship were highly significant. However, whilst the model is unable to reliably predict the occurrence of P. volans at any given 3-ha site, tests of the performance of the model showed that it performed well when the results of field surveys were aggregated over many sites. The results of our analysis emphasise the importance of including measures of uncertainty in spatial predictions generated from statistical models.
40
Lindenmayer, D. B., A. Welsh, and C. F. Donnelly. "Use of Nest Trees by the Mountain Brushtail Possum (Trichosurus caninus) (Phalangeridae : Marsupialia). III. Spatial Configuration and Co-occupancy of Nest Trees." Wildlife Research 24, no. 6 (1997): 661. http://dx.doi.org/10.1071/wr96112.
Повний текст джерелаАнотація:
Radio-tracking was used to examine the spatial configuration and co-occupancy of large trees with hollows occupied by 16 mountain brushtail possums (Trichosurus caninus) at Cambarville in the central highlands of Victoria, south-eastern Australia. The distance that animals moved between trees on successive days was also examined. Our analyses showed that animals often remained in a given den tree on successive days. On nights when animals did shift between den sites, they typically moved to a new tree that was relatively nearby (< 200 m). Long-distance movements (e.g. > 300 m) between den trees were rare. Considerable variation was found between individuals in the size of areas encompassing trees used frequently (≥5 times) (‘core denning range’) and those encompassing all occupied trees [i.e. including those used infrequently (< 5 times)] (‘total denning range’). The mean area of the core denning range averaged about 1·1 ha for males and 0·7 ha for females. The mean value for the total denning range was approximately 2·6 ha for males and females respectively. Considerable overlap was found in the total denning ranges of pairs of adult males and pairs of adult females. For most animals, the total denning range was shared with the total denning ranges of several other animals. There was substantial variation in the extent of this overlap, ranging from complete enclosure to the sharing of a single tree. The extent of overlap was more limited for the core denning ranges, particularly among females. We observed differences in the extent of the overlap of the total denning ranges of pairs of males and pairs of females in the breeding season (January–March) and non-breeding season (the remaining months of the year). Fewer instances of overlapping total denning ranges among pairs of both males and females were found during the breeding season. The total denning ranges in the breeding season were generally smaller than those in the non- breeding season. Simultaneous co-occupancy of a given den tree by T. caninus was relatively common. Unexpectedly, there was a number of instances of groups of three or four adult animals sharing the same den site on the same night. We recorded several instances of sharing by pairs of animals of the same sex, especially adult males. However, most records of simultaneous tree use were by an adult male and an adult female T. caninus. The extent of overlap in the denning ranges of animals and the prevalence of simultaneous co-occupancy of den trees indicate that the social behaviour of T. caninus at Cambarville may be different from that observed among populations of the species elsewhere in Australia. Possible reasons for these differences are outlined.
41
Lindenmayer, D. B., R. B. Cunningham, C. F. Donnelly, B. J. Triggs, and M. Belvedere. "The conservation of arboreal marsupials in the montane ash forests of the central highlands of Victoria, South-Eastern Australia V. Patterns of use and the microhabitat requirements of the mountain brushtail possum Trichosurus caninus ogilby in retained linear habitats (wildlife corridors)." Biological Conservation 68, no. 1 (1994): 43–51. http://dx.doi.org/10.1016/0006-3207(94)90545-2.
Повний текст джерела
42
Griffiths, Tom. "How many trees make a forest? Cultural debates about vegetation change in Australia." Australian Journal of Botany 50, no. 4 (2002): 375. http://dx.doi.org/10.1071/bt01046.
Повний текст джерелаАнотація:
Environmental history, as it has emerged in recent years, is most distinctive in the way it illustrates a serious engagement between the disciplines of ecology and history. This article begins with an exploration of the lineage and promise of environmental history, particularly in the Australian setting. It then analyses a number of the cultural debates about vegetation change in Australia—about clearing, open landscapes, scrub encroachment and burning practices—and draws attention to the way that morals, politics and aesthetics shaped environmental perception and still do. Clearing was the dominant discourse in the history of landscape change and a legislative requirement for secure settlement. At the same time, criticism of clearing and its effects represented an early conservationist sensibility, but the heroic pioneering labour of clearing, the political imperatives associated with it and the escalating ecological legacy it generated, have sometimes made us forget how open was much of the Australian landscape when Europeans first arrived. The morality of clearing—the arguments for and against—focused the minds of settlers on the trees and the loss of them, while the aesthetics of pastoralism attracted their eyes to the grasslands and made them rejoice in the curious legacy of 'open' landscapes. In the early nineteenth century, the most common usage of the word 'forest' was to describe land fit to graze: 'according to the local distinction, the grass is the discriminating character [of forest land] and not the Trees'. At the same time, pastoralists were unwilling to recognise the role of Aboriginal people in creating such open landscapes and this reticence to acknowledge the Aboriginality of the pastoral economy persists today. This in turn affected the way settlers perceived the new forests that appeared after European invasion. The fate of the vegetation Europeans found has understandably been so much the focus of science and history—its removal, replacement, utilisation, modification and conservation—that 'new forests' easily escape scholarly attention; and being new, they seem far less valuable and threatened. They have generally been perceived as a nuisance, as enclosing and encroaching, as 'scrub', as 'woody weeds'. The politics of understanding regrowth are related not only to the issues of clearing and density, but especially to the culture of burning in Aboriginal and settler society and its implications for management and biodiversity. If the coming together of ecology and history best defines the new 'environmental history', then the most illuminating confluences are those where each discipline helps the other to identify what constitutes a unique 'event', both ecologically and historically. The article therefore finishes with examples of events in two landscapes—the long drought of the 1890s in western New South Wales and the Black Friday bushfires of 1939 in the mountain ash forests of Victoria—to illustrate how each emerges as an intriguing artefact of nature and history, a cultural exaggeration of a natural rhythm. Even as we discover the ecological depth of each apparently 'natural' event, we are reminded of its historical specificity.
43
Unverfärth, Jan, Thomas Mörs, and Benjamin Bomfleur. "Palynological evidence supporting widespread synchronicity of Early Jurassic silicic volcanism throughout the Transantarctic Basin." Antarctic Science 32, no. 5 (July 7, 2020): 396–97. http://dx.doi.org/10.1017/s0954102020000346.
Повний текст джерелаАнотація:
Throughout the Transantarctic Mountains, Early Jurassic silicic magmatism preceding the emplacement of the Ferrar flood-basalt province (Heimann et al. 1994) is documented by the increasing input of silicic ash into otherwise epiclastic, fluviolacustrine deposits of the Beacon Supergroup (see Elliot et al. 2017). Vertebrate biostratigraphy and radiometric analyses indicate a Sinemurian to Pliensbachian age span for silicic volcaniclastic deposits in the central Transantarctic Mountains (CTMs) (Elliot et al. 2017). For northern Victoria Land (NVL), radiometric geochronology and palynostratigraphy revealed that explosive silicic volcanism began with minor pulses during the early Sinemurian (c. 195 Ma) and reached a peak phase beginning in the middle Pliensbachian (c. 187 Ma) (Bomfleur et al. 2014). A basin-wide correlation of these widely separated age frameworks has so far been hampered by the scarcity of data on coeval deposits in southern Victoria Land (SVL). Here, we present new palynostratigraphic data from mixed epiclastic–volcaniclastic deposits in the Prince Albert Mountains that provide supporting evidence for the widespread synchronicity of silicic volcanic episodes preceding Ferrar magmatism.
44
Brunetti, Claudia, Henk Siepel, Peter Convey, Pietro Paolo Fanciulli, Francesco Nardi, and Antonio Carapelli. "Overlooked Species Diversity and Distribution in the Antarctic Mite Genus Stereotydeus." Diversity 13, no. 10 (October 19, 2021): 506. http://dx.doi.org/10.3390/d13100506.
Повний текст джерелаАнотація:
In the harsh Antarctic terrestrial ecosystems, invertebrates are currently confined to sparse and restricted ice free areas, where they have survived on multi-million-year timescales in refugia. The limited dispersal abilities of these invertebrate species, their specific habitat requirements, and the presence of geographical barriers can drastically reduce gene flow between populations, resulting in high genetic differentiation. On continental Antarctica, mites are one of the most diverse invertebrate groups. Recently, two new species of the free living prostigmatid mite genus Stereotydeus Berlese, 1901 were discovered, bringing the number of Antarctic and sub-Antarctic species of this genus up to 15, of which 7 occur along the coast of Victoria Land and in the Transantarctic Mountains. To examine the biodiversity of Stereotydeus spp., the present study combines phylogenetic, morphological and population genetic data of specimens collected from nine localities in Victoria Land. Genetically distinct intraspecific groups are spatially isolated in northern Victoria Land, while, for other species, the genetic haplogroups more often occur sympatrically in southern Victoria Land. We provide a new distribution map for the Stereotydeus species of Victoria Land, which will assist future decisions in matters of the protection and conservation of the unique Antarctic terrestrial fauna.
45
Chatterjee, Sankar, Rajni Tewari, and Deepa Agnihotri. "ADicroidiumflora from the Triassic of Allan Hills, South Victoria Land, Transantarctic Mountains, Antarctica." Alcheringa: An Australasian Journal of Palaeontology 37, no. 2 (June 2013): 209–21. http://dx.doi.org/10.1080/03115518.2013.736799.
Повний текст джерела
46
OBERHOLZER, PETER, CARLO BARONI, JOERG M. SCHAEFER, GIUSEPPE OROMBELLI, SUSAN IVY OCHS, PETER W. KUBIK, HEINRICH BAUR, and RAINER WIELER. "Limited Pliocene/Pleistocene glaciation in Deep Freeze Range, northern Victoria Land, Antarctica, derived from in situ cosmogenic nuclides." Antarctic Science 15, no. 4 (December 2003): 493–502. http://dx.doi.org/10.1017/s0954102003001603.
Повний текст джерелаАнотація:
The question of how stable the climate in Antarctica has been during the last few million years compared to the rest of the planet is still controversial. This study attempts to add new information to the discussion by reconstructing the timing and spatial extent of glacial advances in northern Victoria Land over tens of thousands to millions of years. In Terra Nova Bay region, surface exposure ages and erosion rates of glacially rounded bedrock and glacial erratics have been determined using the cosmogenic nuclides 3He, 10Be and 21Ne. Three morphological units have been analysed. They yield minimum ages of 11 to 34 ka, 309 ka, and 2.6 Ma, respectively. Erosion rates were as low as 20 cm Ma−1 since middle Pliocene time. Taking erosion into account, the oldest surface is 5.3 Ma old. Pleistocene glacier advances had considerable extent, reaching up to 780 m above modern ice levels, but have been restricted to the valleys since at least mid-Pliocene. The existence of landscapes of mid-Pliocene age in northern Victoria Land implies that the climatic stability of the McMurdo Dry Valleys is not unique within the Transantarctic Mountains, but rather the expression of a constantly cold and hyperarid climate regime in entire Victoria Land.
47
Bomfleur, Benjamin, Christian Pott, and Hans Kerp. "Plant assemblages from the Shafer Peak Formation (Lower Jurassic), north Victoria Land, Transantarctic Mountains." Antarctic Science 23, no. 2 (November 23, 2010): 188–208. http://dx.doi.org/10.1017/s0954102010000866.
Повний текст джерелаАнотація:
AbstractThe Jurassic plant fossil record of Gondwana is generally meagre, which renders phytogeographic and palaeoclimatic interpretations difficult to date. Moreover, plant fossil assemblages mainly consist of impressions/compressions with rather limited palaeobiological and palaeoecological significance. We here present a detailed survey of new Early Jurassic plant assemblages from the Pliensbachian Shafer Peak Formation, north Victoria Land, Transantarctic Mountains. Some of the well-preserved fossils yield cuticle. The floras consist of isoetalean lycophytes, sphenophytes, several ferns, bennettitaleans, and conifers. In addition, three distinct kinds of conifer shoots and needles were obtained from bulk macerations. The composition of the plant communities is typical for Jurassic macrofloras of Gondwana, which underscores the general homogeneity of Southern Hemisphere vegetation during the mid-Mesozoic. Altogether, the plant fossil assemblages indicate humid and warm temperate conditions, which is in contrast to recent palaeoclimatic models that predict cool temperate climates for the continental interior of southern Gondwana during the Jurassic. However, there is no evidence for notable soil development or peat accumulation. The environmental conditions were apparently very unstable due to intense volcanic activity that resulted in frequent perturbation of landscape and vegetation, hampering the development of long-lived climax communities. Cuticles of bennettitaleans and conifers show xeromorphic features that may have been beneficial for growth in this volcanic environment.
48
Carpenter, Raymond J., Robert S. Hill, David R. Greenwood, Alan D. Partridge, and Meredith A. Banks. "No snow in the mountains: Early Eocene plant fossils from Hotham Heights, Victoria, Australia." Australian Journal of Botany 52, no. 6 (2004): 685. http://dx.doi.org/10.1071/bt04032.
Повний текст джерелаАнотація:
An Early Eocene plant assemblage from near the summit of Mt Hotham, Victoria, is described, using a combination of macro- and microfossils, especially cuticles. This is important since no other Australian macrofossil sites from this time, when environmental conditions are believed to have been the warmest of the Cenozoic, have been described in detail. The nature of the flora and vegetation supports geological evidence that the site was upland (approximately 800 m above sea level) at this time, with climatic conditions similar to those now experienced in regions such as the Atherton Tablelands in Queensland and mid-montane Papua New Guinea. The vegetation was probably a form of rainforest dominated by mesotherm elements, with abundant ferns including Gleicheniaceae and the tree ferns Cnemidaria, Cyathea and Dicksonia. Gymnosperms included Araucariaceae (Agathis) and Podocarpaceae (at least Acmopyle and Dacrydium). Angiosperms were diverse in Lauraceae (at least nine species including probably Cryptocarya, Endiandra and Litsea) and Proteaceae (at least nine species including probably Musgravea and Darlingia). Other angiosperms included Cunoniaceae, Gymnostoma (Casuarinaceae), Diospyros-like Ebenaceae, and the vine Cissocarpus (Vitaceae). Nothofagus was rare or absent from the Mt Hotham region at this time, as no macrofossil evidence was found, and pollen percentages were very low.
49
Bozzo, E., F. Ferraccioli, M. Gambetta, G. Caneva, M. Spano, M. Chiappini, and D. Damaske. "Recent progress in magnetic anomaly mapping over Victoria Land (Antarctica) and the GITARA 5 survey." Antarctic Science 11, no. 2 (June 1999): 209–16. http://dx.doi.org/10.1017/s0954102099000279.
Повний текст джерелаАнотація:
Magnetic anomaly mapping is used to interpret crustal structure and tectonic evolution of Victoria Land and of the adjacent Ross Sea. Previous interpretation of magnetic anomalies verified seismic and gravimetric findings in the Ross Sea by placing additional constraints both on crustal structure and magmatism of the West Antarctic rift system. An aeromagnetic map of the central-southern part of Victoria Land produced in the framework of the GITARA project, provides new crustal images of part of the Transantarctic Mountains rift shoulder. The map was interpreted to study the transition between the Wilson Terrane and the Precambrian East Antarctic Craton, the extent and distribution of Jurassic tholeiitic magmatism, and the occurrence of post- Jurassic faulting oblique to the rift basins. A compilation with adjacent aeromagnetic data was recently used to study the structures inherited from the Palaeozoic terranes and their reactivation as major fault zones separating different crustal blocks along the TAM rift shoulder. Additional aeromagnetic coverage over a 35 500 km2 sector of northern Victoria Land was acquired during the GITARA 5 (1996/97) survey. The flight altitude was 9000 ft and profile line spacing was 4.4 km for the regional grid and 2.2 km for the detailed one, with a tie line interval of 22 km. Standard processing techniques, optimized with microlevelling procedures were applied to the data to produce a 1:250 000 magnetic anomaly map. The processed GITARA 5 magnetic dataset is a new tool to study the structure of the Rennick Graben, and its relationship to the Palaeozoic Wilson Terrane-Bowers Terrane and Robertson Bay Terrane suture zone. The new map also represents important progress towards a magnetic anomaly compilation over the whole of Victoria Land, since it links previous efforts near the Pacific Coast with those near the Ross Sea.
50
Gonzales, Emily K. "The Distribution and Habitat Selection of Introduced Eastern Grey Squirrels, Sciurus carolinensis, in British Columbia." Canadian Field-Naturalist 119, no. 3 (July 1, 2005): 343. http://dx.doi.org/10.22621/cfn.v119i3.143.
Повний текст джерелаАнотація:
Eastern Grey Squirrels were first introduced to Vancouver in the Lower Mainland of British Columbia in 1909. A separate introduction to Metchosin in the Victoria region occurred in 1966. I surveyed the distribution and habitat selection of Eastern Grey Squirrels in both locales. Eastern Grey Squirrels spread throughout both regions over a period of 30 years and were found predominantly in residential land types. Some natural features and habitats, such as mountains, large bodies of water, and coniferous forests, have acted as barriers to expansion for Eastern Grey Squirrels. Given that urbanization is replacing conifer forests throughout southern British Columbia, it is predicted that Eastern Grey Squirrels will continue to spread as habitat barriers are removed.