Climate-driven variation in food availability between the core and range edge of the endangered northern bettong (Bettongia tropica)

  title={Climate-driven variation in food availability between the core and range edge of the endangered northern bettong (Bettongia tropica)},
  author={Brooke L. Bateman and Sandra E. Abell-Davis and Christopher N. Johnson},
  journal={Australian Journal of Zoology},
The endangered northern bettong (Bettongia tropica) occurs in four disjunct populations in far north Queensland, Australia, at a high density only in its range core (RC). A recent study suggested that B. tropica populations are sparse at the northern and southern range edges (SRE) due to more severe droughts and variable climatic conditions causing fluctuations in the availability of their principal food resource, truffle-like fungi. Truffle availability in the Australian tropics is affected by… 

Figures and Tables from this paper

Invasive predators represent the greatest extinction threat to the endangered northern bettong (Bettongia tropica)

The analysis suggests that assessing and controlling predator populations and thereby minimising predation, particularly of juveniles, should assist in maintaining stability of populations of the northern bettong.

The importance of range edges for an irruptive species during extreme weather events

ContextThreats to wildlife species from extreme events, such as droughts, are predicted to increase in frequency and magnitude with climate change. Extreme events can cause mortality and

Predicting the distribution of a novel bark beetle and its pine hosts under future climate conditions

Habitat distribution models were developed and projected to four potential climate scenarios for the period 2040–2060 and this predicted the gains and losses of suitable D. rhizophagus and Pinus host habitat in all scenarios.

The effects of weather variability on patterns of genetic diversity in Tasmanian bettongs

The relationship between weather and range‐wide genetic diversity in a marsupial, Bettongia gaimardi, is investigated using dynamic species distribution models (SDMs) to illustrate the importance of weather in driving population dynamics and species distributions on decadal timescales and thereby in affecting genetic diversity.

The endangered northern bettong, Bettongia tropica, performs a unique and potentially irreplaceable dispersal function for ectomycorrhizal truffle fungi

The results suggest that this system is sensitive to the extinction of highly connected specialist species like B. tropica and their loss could have consequences for ectomycorrhizal truffle fungal diversity and healthy plant–mycorrhIZal relationships.

Potential breeding distributions of U.S. birds predicted with both short-term variability and long-term average climate data.

To identify which species and guilds are sensitive to climate variability, identify sites of high conservation value where climate variability is low, and assess how species' potential distributions may have already shifted due recent climate change, parameterized species distribution models based on either short-term variability or long-term average climate covariates for 320 bird species in the conterminous USA and tested whether any life-history trait-based guilds were particularly sensitive to short- term conditions.

Which temporal resolution to consider when investigating the impact of climatic data on population dynamics? The case of the lesser horseshoe bat (Rhinolophus hipposideros)

The importance of choosing an appropriate time resolution is demonstrated and it is suggested that analogous studies should consider fine-scale temporal resolution (e.g. month) to better grasp the relationship between population dynamics and climatic conditions.

Bobolink (Dolichonyx oryzivorus) Declines Follow Bison (Bison bison) Reintroduction on Private Conservation Grasslands

It is suggested that bison reintroduction as a conservation strategy may be counterproductive in Grassland fragments where overgrazing, trampling, and other negative impacts drive declines in grassland breeding birds.

Biotic interactions influence the projected distribution of a specialist mammal under climate change

To measure the effects of including biotic interactions on climate‐based species distribution models (SDMs) used to predict distribution shifts under climate change. We evaluated the performance of



Capture success and population density of the northern bettong Bettongia tropica in northeastern Queensland.

The population density of the northern bettong (Bettongia tropica), an endangered potoroid restricted to northeastern Australia, was estimated using minimum known-to-be-alive (MKTBA) and Jolly-Seber estimates derived from mark-recapture data to indicate that populations on the Lamb Range, the species' stronghold, are generally healthy.

Tropical hypogeous fungal sporocarp distribution in time and space: implications for an endangered specialist, Mycophagous Marsupial, Bettongia tropica

Assessment of the temporal and spatial distribution of tropical hypogeous fungal sporocarps along an altitude gradient of ecotonal sclerophyll forest in Far North Queensland, Australia suggested that precipitation may be the sole factor influencing fruiting and diversity in tropical ecosystems.

Responses of Non-volant Mammals to Late Quaternary Climatic Changes in the Wet Tropics Region of North-eastern Australia

  • J. Winter
  • Environmental Science, Geography
  • 1997
Past geographical occurrence of non-volant mammals is examined by equating the mammals’ known temperature tolerance with palaeoclimatic temperature zones, and Clarification of periods of vicariance and dispersal provides a conceptual framework for testing relative divergences of populations within and between regions.

Truffle abundance in riparian and upland mixed-conifer forest of California's southern Sierra Nevada

Truffle frequency, biomass, and species richness were greater in riparian sites than in upland sites in both spring and summer samples, suggesting that log density, tree proximity, and soil moisture may influence truffle production in these habitats.

Ecological and Evolutionary Responses to Recent Climate Change

Range-restricted species, particularly polar and mountaintop species, show severe range contractions and have been the first groups in which entire species have gone extinct due to recent climate change.

Phylogeography and population structure of an ecotonal marsupial, Bettongia tropica, determined using mtDNA and microsatellites

It is found that it may be more difficult to detect molecular signatures for recent bottlenecks under conditions of very low migration rates than for isolated populations and, conversely, that ‘false’ bottleneck signatures may be observed at higher migration rates.

Beyond simple means: integrating extreme events and biotic interactions in species distribution models: conservation implications for the northern bettong (Bettongia tropica) under climate change

In order to adopt pertinent management strategies for a species, it is imperative to have an understanding of its distribution and requirements. Species distribution models (SDMs) are broadly applied

Ecology of the Northern Bettong, Bettongia tropica, a Tropical Mycophagist

It is suggested that this species (like bettongs and potoroos in southern Australia) depends on hypogeous fungi, and that expansion of its geographical range into drier forest types is prevented by shortages of fungus during the dry season.