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Journal articles on the topic 'Low density populations of koalas'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Sullivan, B. J., W. M. Norris, and G. S. Baxter. "Low-density koala (Phascolarctos cinereus) populations in the mulgalands of south-west Queensland. II. Distribution and diet." Wildlife Research 30, no. 4 (2003): 331. http://dx.doi.org/10.1071/wr00032.

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This study used faecal pellets to investigate the broadscale distribution and diet of koalas in the mulgalands biogeographic region of south-west Queensland. Koala distribution was determined by conducting faecal pellet searches within a 30-cm radius of the base of eucalypts on 149 belt transects, located using a multi-scaled stratified sampling design. Cuticular analysis of pellets collected from 22 of these sites was conducted to identify the dietary composition of koalas within the region. Our data suggest that koala distribution is concentrated in the northern and more easterly regions of

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Law, B., L. Gonsalves, R. Bilney, J. Peterie, R. Pietsch, P. Roe, and A. Truskinger. "Using Passive Acoustic Recording and Automated Call Identification to Survey Koalas in the Southern Forests of New South Wales." Australian Zoologist 40, no. 3 (January 2020): 477–86. http://dx.doi.org/10.7882/az.2019.033.

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Cost-effective surveys of low density koala populations are challenging, but technological developments in the acoustics field offer great potential for landscape-scale surveys and monitoring. We assessed passive acoustic recording coupled with automated call identification as a survey method for koalas Phascolarctos cinereus . Surveys targeted areas of previously known koala activity based on scat surveys in southern forests of New South Wales where a low density of koalas is suspected. We set 24 Song Meters to record at night over a two week period (~3,696 hours) in the koala breeding season

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Menkhorst, Peter, David Ramsey, Tim O'Brien, Emily Hynes, and Desley Whisson. "Survival and movements of koalas translocated from an over-abundant population." Wildlife Research 46, no. 7 (2019): 557. http://dx.doi.org/10.1071/wr19090.

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Abstract Context At some sites in southern Victoria, browsing pressure caused by high-density koala populations can result in defoliation of preferred browse trees. In extreme cases, this over-browsing can lead to widespread tree death and starvation of koalas. To reduce the potential for mortality of trees and koalas, a management strategy that includes fertility control of females and translocation of healthy individuals (male and female) has been adopted. AimsTo compare the short- to medium-term survival and body condition of koalas translocated from over-browsed habitat and released into u

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Masters, Pip, Toni Duka, Steve Berris, and Graeme Moss. "Koalas on Kangaroo Island: from introduction to pest status in less than a century." Wildlife Research 31, no. 3 (2004): 267. http://dx.doi.org/10.1071/wr03007.

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In less than a century the ecological profile of koalas on Kangaroo Island has shifted from that of a species introduced for conservation purposes to one of pest status. Between 1923 and 1925, 18 koalas were released on Kangaroo Island. Their numbers increased rapidly and in 1997 a population-control program was implemented based on a population estimate of 5000 koalas. During the course of this program, it became clear that the koala population on Kangaroo Island was much greater and more widely distributed than previously thought, hence a more comprehensive population survey was carried out.

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Sullivan, B. J., G. S. Baxter, A. T. Lisle, L. Pahl, and W. M. Norris. "Low-density koala (Phascolarctos cinereus) populations in the mulgalands of south-west Queensland. IV. Abundance and conservation status." Wildlife Research 31, no. 1 (2004): 19. http://dx.doi.org/10.1071/wr02037.

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Urban encroachment on dense, coastal koala populations has ensured that their management has received increasing government and public attention. The recently developed National Koala Conservation Strategy calls for maintenance of viable populations in the wild. Yet the success of this, and other, conservation initiatives is hampered by lack of reliable and generally accepted national and regional population estimates. In this paper we address this problem in a potentially large, but poorly studied, regional population in the State that is likely to have the largest wild populations. We draw o

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Hynes, E. F., K. A. Handasyde, Geoff Shaw, and Marilyn B. Renfree. "Levonorgestrel, not etonogestrel, provides contraception in free-ranging koalas." Reproduction, Fertility and Development 22, no. 6 (2010): 913. http://dx.doi.org/10.1071/rd09253.

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Management of high-density koala (Phascolarctos cinereus) populations is essential because of the browsing damage they inflict on their habitat. We have tested two types of gestagen implant, namely levonorgestrel and etonogestrel, as contraceptives for koalas. Free-ranging female koalas were given either a control, levonorgestrel (70 mg) or etonogestrel (34 or 68 mg) implant before the breeding season. Koalas were monitored every 4–12 weeks for births. Plasma progesterone was measured and a cytological smear of the urogenital sinus was taken. Fertility was high in the control group and the two

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Seabrook, Leonie, Clive McAlpine, Greg Baxter, Jonathan Rhodes, Adrian Bradley, and Daniel Lunney. "Drought-driven change in wildlife distribution and numbers: a case study of koalas in south west Queensland." Wildlife Research 38, no. 6 (2011): 509. http://dx.doi.org/10.1071/wr11064.

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Context Global climate change will lead to increased climate variability, including more frequent drought and heatwaves, in many areas of the world. This will affect the distribution and numbers of wildlife populations. In south-west Queensland, anecdotal reports indicated that a low density but significant koala population had been impacted by drought from 2001–2009, in accord with the predicted effects of climate change. Aims The study aimed to compare koala distribution and numbers in south-west Queensland in 2009 with pre-drought estimates from 1995–1997. Methods Community surveys and faec

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Graham, C., L. Woolford, L. Johnson, and K. N. Speight. "Age-dependent changes in gross and histological morphology of the thyroid gland in South Australian koalas (Phascolarctos cinereus)." Australian Journal of Zoology 62, no. 5 (2014): 360. http://dx.doi.org/10.1071/zo14011.

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Studies characterising the thyroid gland structure of koalas are limited and have not previously been undertaken in South Australian populations. Hence, this study aimed to describe the thyroid gland morphology of koalas from the Mount Lofty region, South Australia. Results showed that thyroid gland morphology was highly variable between individual koalas (n = 36), ranging from that considered typical for healthy mammals, in which small colloid-filled follicles were lined by cuboidal epithelium, to that consistent with colloidal goitre, in which macrofollicles distended with colloid were lined

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Martin, R. W. "Overbrowsing, and decline of a population of the koala, Phascolarctos cinereus, in Victoria. III. Population dynamics." Wildlife Research 12, no. 3 (1985): 377. http://dx.doi.org/10.1071/wr9850377.

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The demography of a population of koalas at Walkerville, Victoria, which was severely defoliating its preferred food trees was monitored for 3 yr from Aug. 1977. Population density declined from 3.0 animals/ha in winter 1978 to 0.7/ha in winter 1980. Population density also fluctuated seasonally, with a max. in autumn/winter and a min. in spring. Fertility rate was low compared with that of other populations and declined over the period of the study. This was due to depressed fertility among the younger females and substantial infertility among the older females. Mortality was heaviest in the

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Lunney, Daniel, Mathew S. Crowther, Ian Shannon, and Jessica V. Bryant. "Combining a map-based public survey with an estimation of site occupancy to determine the recent and changing distribution of the koala in New South Wales." Wildlife Research 36, no. 3 (2009): 262. http://dx.doi.org/10.1071/wr08079.

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The present study demonstrates one solution to a problem faced by managers of species of conservation concern – how to develop broad-scale maps of populations, within known general distribution limits, for the purpose of targeted management action. We aimed to map the current populations of the koala, Phascolarctos cinereus, in New South Wales, Australia. This cryptic animal is widespread, although patchily distributed. It principally occurs on private property, and it can be hard to detect. We combined a map-based mail survey of rural and outer-urban New South Wales with recent developments i

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Sullivan, B. J., G. S. Baxter, and A. T. Lisle. "Low-density koala (Phascolarctos cinereus) populations in the mulgalands of south-west Queensland. III. Broad-scale patterns of habitat use." Wildlife Research 30, no. 6 (2003): 583. http://dx.doi.org/10.1071/wr02036.

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To date there have been few quantitative studies of the distribution of, and relative habitat utilisation by, koalas in the mulgalands of Queensland. To examine these parameters we applied habitat-accessibility and relative habitat-utilisation indices to estimates of faecal pellet density sampled at 149 sites across the region. Modelling the presence of pellets using logistic regression showed that the potential range of accessible habitats and relative habitat use varied greatly across the region, with rainfall being probably the most important determinant of distribution. Within that distrib

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Lollback, Gregory W., J. Guy Castley, Alexa C. Mossaz, and Jean-Marc Hero. "Fine-scale changes in spatial habitat use by a low-density koala population in an isolated periurban forest remnant." Australian Mammalogy 40, no. 1 (2018): 84. http://dx.doi.org/10.1071/am16036.

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Koala (Phascolarctos cinereus) populations in south-east Queensland are in decline. Although various studies have looked at broad-scale tree preference and habitat quality, there has been little attempt to quantify fine-scale activity shifts from one year to the next or examination of activity at the mesoscale. This study quantified koala activity levels in a 909-ha forest patch at Karawatha Forest Park, in south Brisbane. The Spot Assessment Technique was used to quantify activity and tree selection on 33 long-term monitoring plots in 2009 and 2010. In total, 843 trees were searched and koala

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Mitchell, PJ, R. Bilney, and RW Martin. "Population-Structure and Reproductive Status of Koalas on Raymond Island, Victoria." Wildlife Research 15, no. 5 (1988): 511. http://dx.doi.org/10.1071/wr9880511.

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In December 1980, 87 adult (>1-year-old) koalas (36 males, 51 females) were captured and marked on Raymond Island, in the Gippsland Lakes of Victoria. A further 85 adults and 34 juveniles (6-12 months old) were sighted but not captured. In August 1985, 25 females and 24 males were captured and examined. The proportions of animals in the older age classes (age classes 4 and above) were 61% in 1980 and 39% in 1985, while the reproduction rates were 38 and 40%, respectively. The low reproduction rates, and the high proportions of older animals in 1980, were attributed to reproductive tract dis

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Sullivan, B. J., G. S. Baxter, and A. T. Lisle. "Low-density koala (Phascolarctos cinereus) populations in the mulgalands of south-west Queensland. I. Faecal pellet sampling protocol." Wildlife Research 29, no. 5 (2002): 455. http://dx.doi.org/10.1071/wr00110.

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Koala (Phascolarctos cinereus) populations in eastern Australia are threatened by land clearing for agricultural and urban development. At the same time, conservation efforts are hindered by a dearth of information about inland populations. Faecal deposits offer a source of information that is readily available and easily collected non-invasively. We detail a faecal pellet sampling protocol that was developed for use in a large rangeland biogeographic region. The method samples trees in belt transects, uses a thorough search at the tree base to quickly identify trees with koala pellets under t

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TAYLOR, ANDREA C., JENNY MARSHALL GRAVES, NEIL D. MURRAY, STEPHEN J. O'BRIEN, N. YUHKI, and BILL SHERWIN. "Conservation genetics of the koala (Phascolarctos cinereus): low mitochondrial DNA variation amongst southern Australian populations." Genetical Research 69, no. 1 (February 1997): 25–33. http://dx.doi.org/10.1017/s0016672397002607.

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Koala (Phascolarctos cinereus) populations in southern Australia have a history of bottlenecks – earlier this century the species became extinct in South Australia, and almost so in Victoria. Subsequently large numbers of animals from island populations (founded from very few animals) have been translocated back to mainland sites and to other islands in the region. As part of a larger study of the genetic structure of koala populations in southern Australia, we have undertaken a survey of mitochondrial DNA restriction fragment length polymorphism (mtDNA-RFLP) variability. Genomic DNA from 91 k

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Stalenberg, Eleanor, Ian R. Wallis, Ross B. Cunningham, Chris Allen, and William J. Foley. "Nutritional Correlates of Koala Persistence in a Low-Density Population." PLoS ONE 9, no. 12 (December 3, 2014): e113930. http://dx.doi.org/10.1371/journal.pone.0113930.

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Wilmer, JMW, A. Melzer, F. Carrick, and C. Moritz. "Low genetic diversity and inbreeding depression in Queensland Koalas." Wildlife Research 20, no. 2 (1993): 177. http://dx.doi.org/10.1071/wr9930177.

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The amount of genetic variation in two natural populations of Queensland koalas (Phascolarctos cinereus adustus) was assessed by analysis of mitochondrial DNA. Levels and any adverse effects of inbreeding (inbreeding depression) were estimated from the pedigree of a well-characterised captive colony. Genetic diversity of mitochondrial DNA was found to be exceedingly low both within and between the two populations, but the variation detected was found to be strongly structured geographically. Inbreeding levels in the captive colony were moderate to high yet the only apparent evidence of inbreed

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18

Seddon, Jennifer M., Kristen E. Lee, Stephen D. Johnston, Vere N. Nicolson, Michael Pyne, Frank N. Carrick, and William A. H. Ellis. "Testing the regional genetic representativeness of captive koala populations in South-East Queensland." Wildlife Research 41, no. 4 (2014): 277. http://dx.doi.org/10.1071/wr13103.

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Context Captive breeding for release back to the wild is an important component of ex situ conservation but requires genetic diversity that is representative of the wild population and has the ultimate goal of producing ecologically sustainable and resilient populations. However, defining and testing for representativeness of captive populations is difficult. Koalas (Phascolarctos cinereus) are bred for educational and tourism purposes in zoos and wildlife parks in South-East Queensland, but there are drastic declines evident in some wild koala populations in this region. Aim We compared genet

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de Oliveira, S. M., P. J. Murray, D. L. de Villiers, and G. S. Baxter. "Ecology and movement of urban koalas adjacent to linear infrastructure in coastal south-east Queensland." Australian Mammalogy 36, no. 1 (2014): 45. http://dx.doi.org/10.1071/am12046.

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In Redland City, koalas (Phascolarctos cinereus) are in rapid decline as they are exposed to anthropogenic threats such as habitat clearing, dog attacks, vehicle collisions and disease. This study investigated the influence of linear infrastructure on the movement and habitat use of urban koalas. Seven koalas were tracked for up to 28 weeks during the breeding season. Home ranges were calculated for 95% Minimum Convex Polygon (MCP95%) and 95% fixed Kernel Density (FK95%). Koalas responded to the landscape in different ways. Linear infrastructure did not restrict the movements of most koalas. H

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Cristescu, Romane, Valma Cahill, William B. Sherwin, Kathrine Handasyde, Kris Carlyon, Desley Whisson, Catherine A. Herbert, Britt Louise J. Carlsson, Alan N. Wilton, and Des W. Cooper. "Inbreeding and testicular abnormalities in a bottlenecked population of koalas (Phascolarctos cinereus)." Wildlife Research 36, no. 4 (2009): 299. http://dx.doi.org/10.1071/wr08010.

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Habitat destruction and fragmentation, interactions with introduced species or the relocation of animals to form new populations for conservation purposes may result in a multiplication of population bottlenecks. Examples are the translocations of koalas to French Island and its derivative Kangaroo Island population, with both populations established as insurance policies against koala extinction. In terms of population size, these conservation programs were success stories. However, the genetic story could be different. We conducted a genetic investigation of French and Kangaroo Island koalas

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Cristescu, Romane, Valma Cahill, William B. Sherwin, Kathrine Handasyde, Kris Carlyon, Desley Whisson, Catherine A. Herbert, Britt Louise J. Carlsson, Alan N. Wilton, and Des W. Cooper. "Corrigendum to: Inbreeding and testicular abnormalities in a bottlenecked population of koalas (Phascolarctos cinereus)." Wildlife Research 39, no. 4 (2012): 374. http://dx.doi.org/10.1071/wr08010_co.

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Habitat destruction and fragmentation, interactions with introduced species or the relocation of animals to form new populations for conservation purposes may result in a multiplication of population bottlenecks. Examples are the translocations of koalas to French Island and its derivative Kangaroo Island population, with both populations established as insurance policies against koala extinction. In terms of population size, these conservation programs were success stories. However, the genetic story could be different. We conducted a genetic investigation of French and Kangaroo Island koalas

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Lunney, Daniel, Carol Esson, Chris Moon, Murray Ellis, and Alison Matthews. "A Community-based Survey of the Koala, Phascolarctos cinereus, in the Eden Region of South-eastern New South Wales." Wildlife Research 24, no. 1 (1997): 111. http://dx.doi.org/10.1071/wr94034.

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A community-based postal survey (questionnaire and map) was undertaken in the Eden region of south-eastern New South Wales in 1991–92 to help determine the local distribution of koalas and to obtain information on which to base a regional plan of management for koalas. The 1198 replies from the II 600 households in the region represented all parts of the area surveyed. The survey responses suggest that koalas are rare in the Eden region, and that the number of koalas has been constantly low for the last four decades. The records are scattered both chronologically and geographically. National P

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Curtin, A., D. Lunney, and A. Matthews. "A survey of a low-density koala population in a major reserve system, near Sydney, New South Wales.." Australian Mammalogy 23, no. 2 (2001): 135. http://dx.doi.org/10.1071/am01135.

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cinereus) in Yengo National Park and Parr State Recreation Area, which together form a major reserve system where P. cinereus were known to be scarce. The first, a community survey which was distributed to 823 residences adjoining the reserves, yielded 139 responses. Of these, 31 responses provided information that allowed 26 P. cinereus locality records to be verified. A further eight P. cinereus locality records were obtained from interviews with neighbours. Most records were road-based. The second, a field survey based on scat searches, produced an additional 13 P. cinereus localities. P. c

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Fitzpatrick, Matthew C., Evan L. Preisser, Aaron M. Ellison, and Joseph S. Elkinton. "Observer bias and the detection of low-density populations." Ecological Applications 19, no. 7 (October 2009): 1673–79. http://dx.doi.org/10.1890/09-0265.1.

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Heinke, C. O., M. G. Ivanov, E. W. Koch, R. Andrews, L. Chomiuk, H. N. Cohn, S. Crothers, et al. "The X-ray emissivity of low-density stellar populations." Monthly Notices of the Royal Astronomical Society 492, no. 4 (January 24, 2020): 5684–708. http://dx.doi.org/10.1093/mnras/staa194.

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ABSTRACT The dynamical production of low-mass X-ray binaries and brighter cataclysmic variables (CVs) in dense globular clusters is well-established. We investigate how the X-ray emissivity of fainter X-ray binaries (principally CVs and coronally active binaries) varies between different environments. We compile calculations (largely from the literature) of the X-ray emissivity of old stellar populations, including open and globular clusters and several galaxies. We investigate three literature claims of unusual X-ray sources in low-density stellar populations. We show that a suggested quiesce

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Liu, Zhenguo. "Oxidized low-density lipoprotein alters endothelial progenitor cell populations." Frontiers in Bioscience 20, no. 6 (2015): 975–88. http://dx.doi.org/10.2741/4351.

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Crawley, Michael J. "Reduction of oak fecundity by low-density herbivore populations." Nature 314, no. 6007 (March 1985): 163–64. http://dx.doi.org/10.1038/314163a0.

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Jiang, Alex, Andrew Tribe, Clive J. C. Phillips, and Peter J. Murray. "Do Livestock Injure and Kill Koalas? Insights from Wildlife Hospital and Rescue Group Admissions and an Online Survey of Livestock–Koala Conflicts." Animals 11, no. 9 (September 13, 2021): 2684. http://dx.doi.org/10.3390/ani11092684.

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Koala populations in Australia are declining due to threats such as chlamydiosis, wild dog predation and vehicle collision. In the last decade, grazing livestock emerged anecdotally as a threat to koala survival in areas where koala habitat and livestock grazing land overlap. This is the first study investigating the significance of livestock-inflicted injuries and deaths in koala populations over a large spatial and temporal scale. We investigated the outcome, scale, and frequency of livestock–koala incidents via an online survey and analysed koala admission records in Queensland wildlife hos

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Dreitz, Victoria J., Paul M. Lukacs, and Fritz L. Knopf. "MONITORING LOW DENSITY AVIAN POPULATIONS: AN EXAMPLE USING MOUNTAIN PLOVERS." Condor 108, no. 3 (2006): 700. http://dx.doi.org/10.1650/0010-5422(2006)108[700:mldapa]2.0.co;2.

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Willi, Y., P. Griffin, and J. Van Buskirk. "Drift load in populations of small size and low density." Heredity 110, no. 3 (December 5, 2012): 296–302. http://dx.doi.org/10.1038/hdy.2012.86.

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Dreitz, Victoria J., Paul M. Lukacs, and Fritz L. Knopf. "Monitoring Low Density Avian Populations: An Example Using Mountain Plovers." Condor 108, no. 3 (August 1, 2006): 700–706. http://dx.doi.org/10.1093/condor/108.3.700.

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Abstract Declines in avian populations highlight a need for rigorous, broad-scale monitoring programs to document trends in avian populations that occur in low densities across expansive landscapes. Accounting for the spatial variation and variation in detection probability inherent to monitoring programs is thought to be effort-intensive and time-consuming. We determined the feasibility of the analytical method developed by Royle and Nichols (2003), which uses presence-absence (detection-nondetection) field data, to estimate abundance of Mountain Plovers (Charadrius montanus) per sampling uni

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Kvasnes, Mikkel Andreas Jørnsøn, Hans Christian Pedersen, Torstein Storaas, and Erlend Birkeland Nilsen. "Vegetation type and demography of low density willow ptarmigan populations." Journal of Wildlife Management 81, no. 1 (October 5, 2016): 174–81. http://dx.doi.org/10.1002/jwmg.21180.

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Murray, Dennis L., James D. Roth, Ethan Ellsworth, Aaron J. Wirsing, and Todd D. Steury. "Estimating low-density snowshoe hare populations using fecal pellet counts." Canadian Journal of Zoology 80, no. 4 (April 1, 2002): 771–81. http://dx.doi.org/10.1139/z02-027.

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Snowshoe hare (Lepus americanus) populations found at high densities can be estimated using fecal pellet densities on rectangular plots, but this method has yet to be evaluated for low-density populations. We further tested the use of fecal pellet plots for estimating hare populations by correlating pellet densities with estimated hare numbers on 12 intensive study areas in Idaho; pellet counts from extensive transects (n = 615) across northern Idaho enabled rectangular plots (0.155 m2) to be compared with paired small (0.155 m2) and large (1 m2) circular plots (metre-circle plots). Metre-circ

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Dennison, S., G. J. Frankham, L. E. Neaves, C. Flanagan, S. FitzGibbon, M. D. B. Eldridge, and R. N. Johnson. "Population genetics of the koala (Phascolarctos cinereus) in north-eastern New South Wales and south-eastern Queensland." Australian Journal of Zoology 64, no. 6 (2016): 402. http://dx.doi.org/10.1071/zo16081.

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Habitat loss and fragmentation are key threats to local koala (Phascolarctos cinereus) populations. Broad-scale management is suboptimal for koalas because distribution models are not easily generalised across regions. Therefore, it is imperative that data relevant to local management bodies are available. Genetic data provides important information on gene flow and potential habitat barriers, including anthropogenic disturbances. Little genetic data are available for nationally significant koala populations in north-eastern New South Wales, despite reported declines due to urbanisation and ha

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Martin, R. W. "Overbrowsing, and decline of a population of the koala, Phascolarctos cinereus, in Victoria. II. Population condition." Wildlife Research 12, no. 3 (1985): 367. http://dx.doi.org/10.1071/wr9850367.

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Juvenile and sub-adult koalas from a population at Walkerville, Victoria, which was severely defoliating its preferred food trees, had significantly lower growth rates than animals from a population on French Island, Victoria. Mature males from Walkerville were significantly smaller than French Island males in most age classes. There was no significant difference between the body weights of mature females of the 2 populations. Haematological tests on the females showed that nutritionally induced anaemia was significant in the Walkerville animals by Jan. 1981. Heavy tick loads probably exacerba

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CORRÊA, F. F., R. H. MADAIL, S. BARBOSA, M. P. PEREIRA, E. M. CASTRO, C. T. G. SORIANO, and F. J. PEREIRA. "Anatomy and physiology of Cattail as related to different population densities." Planta Daninha 33, no. 1 (March 2015): 01–12. http://dx.doi.org/10.1590/s0100-83582015000100001.

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The objective of this work was to evaluate the effects of the population density of Typha angustifolia plants in the anatomical and physiological characteristics. Plants were collected from populations of high density (over 50% of colonization capacity) and low density (less than 50% of colonization capacity) and cultivated under controlled greenhouse conditions. Plants from both populations were grown in plastic trays containing 4 L of nutritive solution for 60 days. At the end of this period, the relative growth rate, leaf area ratio, net assimilatory rate, root/shoot ratio, leaf anatomy, ro

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Järemo, P., M. Milovanovic, C. Buller, S. Nilsson, and B. Winblad. "Low-density platelet populations demonstrate lowin vivoactivity in sporadic Alzheimer disease." Platelets 23, no. 2 (December 13, 2011): 116–20. http://dx.doi.org/10.3109/09537104.2011.593654.

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Hart, Leslie C., Maurice C. Goodman, Ryan K. Walter, Laura Rogers-Bennett, Peter Shum, April D. Garrett, James M. Watanabe, and Jennifer K. O'Leary. "Abalone Recruitment in Low-Density and Aggregated Populations Facing Climatic Stress." Journal of Shellfish Research 39, no. 2 (August 26, 2020): 359. http://dx.doi.org/10.2983/035.039.0218.

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Stacy, E. A., J. L. Hamrick, J. D. Nason, S. P. Hubbell, R. B. Foster, and R. Condit. "Pollen Dispersal in Low-Density Populations of Three Neotropical Tree Species." American Naturalist 148, no. 2 (August 1996): 275–98. http://dx.doi.org/10.1086/285925.

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Rodríguez-Barreras, Ruber. "Demographic implications of predatory wrasses on low-density Diadema antillarum populations." Marine Biology Research 14, no. 4 (February 26, 2018): 383–91. http://dx.doi.org/10.1080/17451000.2018.1426861.

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Collobert, Maela, Marc Sarzi, Roger L. Davies, Harald Kuntschner, and Matthew Colless. "Central stellar populations of early-type galaxies in low-density environments." Monthly Notices of the Royal Astronomical Society 370, no. 3 (July 5, 2006): 1213–22. http://dx.doi.org/10.1111/j.1365-2966.2006.10538.x.

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Stober, Jonathan M., Rocio Prieto-Gonzalez, Lora L. Smith, Tiago A. Marques, and Len Thomas. "Techniques for Estimating the Size of Low-Density Gopher Tortoise Populations." Journal of Fish and Wildlife Management 8, no. 2 (June 1, 2017): 377–86. http://dx.doi.org/10.3996/012017-jfwm-005.

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Abstract Gopher tortoises (Gopherus polyphemus) are candidates for range-wide listing as threatened under the U.S. Endangered Species Act. Reliable population estimates are important to inform policy and management for recovery of the species. Line transect distance sampling has been adopted as the preferred method to estimate population size. However, when tortoise density is low, it can be challenging to obtain enough tortoise observations to reliably estimate the probability of detection, a vital component of the method. We suggest a modification to the method based on counting usable torto

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Bouchard, Mathieu, Véronique Martel, Jacques Régnière, Pierre Therrien, and David Laginha Pinto Correia. "Do natural enemies explain fluctuations in low-density spruce budworm populations?" Ecology 99, no. 9 (July 30, 2018): 2047–57. http://dx.doi.org/10.1002/ecy.2417.

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Hanberry, Brice B. "Compounded Heat and Fire Risk for Future U.S. Populations." Sustainability 12, no. 8 (April 17, 2020): 3277. http://dx.doi.org/10.3390/su12083277.

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Climate change is increasing the risk of extreme events, resulting in social and economic challenges. I examined recent past (1971–2000), current and near future (2010–2039), and future (2040–2069) fire and heat hazard combined with population growth by different regions and residential densities (i.e., exurban low and high densities, suburban, and urban low and high densities). Regional values for extreme fire weather days varied greatly. Temperature and number of extreme fire weather days increased over time for all residential density categories, with the greatest increases in the exurban l

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Kellner, James R., and Stephen P. Hubbell. "Density-dependent adult recruitment in a low-density tropical tree." Proceedings of the National Academy of Sciences 115, no. 44 (October 15, 2018): 11268–73. http://dx.doi.org/10.1073/pnas.1800353115.

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The Janzen–Connell hypothesis is a well-known explanation for why tropical forests have large numbers of tree species. A fundamental prediction of the hypothesis is that the probability of adult recruitment is less in regions of high conspecific adult density, a pattern mediated by density-dependent mortality in juvenile life stages. Although there is strong evidence in many tree species that seeds, seedlings, and saplings suffer conspecific density-dependent mortality, no study has shown that adult tree recruitment is negatively density dependent. Density-dependent adult recruitment is necess

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Hayashi, Hiromi, Hitomi Sakai, Wakako Minakuchi-Fujiwara, Miki Takayama, Michiko Nakamura-Murata, Ryoko Kamo, Kanako Funakoshi, et al. "Cytokinesis Arrest and Nuclear Fission in Low Density Populations of Trichomonad Protozoan." Zoological Science 19, no. 10 (October 2002): 1089–94. http://dx.doi.org/10.2108/zsj.19.1089.

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MacPherson, Laura M., Michael G. Sullivan, Lee Foote, and Cameron E. Stevens. "Evaluating Sampling Techniques for Low-Density Populations of Arctic Grayling (Thymallus arcticus)." Northwestern Naturalist 93, no. 2 (September 2012): 120–32. http://dx.doi.org/10.1898/nwn11-04.1.

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Kieckhefer, R. W., and J. L. Gellner. "Yield Losses in Winter Wheat Caused by Low‐Density Cereal Aphid Populations." Agronomy Journal 84, no. 2 (March 1992): 180–83. http://dx.doi.org/10.2134/agronj1992.00021962008400020011x.

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Rohde, Klaus. "Intra- and Interspecific Interactions in Low Density Populations in Resource-Rich Habitats." Oikos 60, no. 1 (February 1991): 91. http://dx.doi.org/10.2307/3544997.

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Wang, Ying, Xinzhi Sheng, Yao Liu, Baolai Liang, Xiaoli Li, Qinglin Guo, Yuriy I. Mazur, Morgan E. Ware, and Gregory J. Salamo. "PL of low‐density InAs/GaAs quantum dots with different bimodal populations." Micro & Nano Letters 12, no. 9 (September 2017): 599–604. http://dx.doi.org/10.1049/mnl.2016.0779.

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