New Paper – No need for disease: testing extinction hypotheses for the thylacine using multi-species metamodels

A new paper involving Environment Institute members Thomas Prowse, Corey Bradshaw (also SARDI), Michael Watts and Barry Brook as well as Christopher Johnson (University of Tasmania), Robert Lacy (Chicago Zoological Society) and John Pollak (Cornell University) has recently been published in the Journal of Animal Ecology.

The paper titled ‘No need for disease: testing extinction hypotheses for the thylacine using multi-species metamodels’ designed a new population viability approach (PVA) that includes species interactions explicitly by networking species models within a single ‘metamodel’.

Thylacine Thylacinus cynocephalusImage: Kelly Garbato

Thylacine Thylacinus cynocephalus
Image: Kelly Garbato (Flikr)

Population viability analysis (PVA) is used to assess the extinction risk of threatened species and to evaluate different management strategies. However, conventional PVA neglects important biotic interactions and therefore can fail to identify important threatening processes.

This study demonstrates the utility of PVA metamodels by using them to reinterpret the extinction of the carnivorous, marsupial thylacine Thylacinus cynocephalus (Tasmanian Tiger) in Tasmania. In particular, they test the claim that well-documented impacts of European settlement cannot account for this extinction and that an unknown disease must have been an additional and necessary cause.

Read the paper to find out more.


New Paper: Climate change and the cockatoo

Berton Harris

A new paper titled ‘Managing the long-term persistence of a rare cockatoo under climate change‘ investigates using combined population and bioclimatic models to estimate the future effects of climate change on the viability of a cockatoo population. Their research revealed that unmitigated climate change is likely to be a substantial threat to the cockatoo.

The paper involves Environment Institute members Berton Harris, Damien Fordham, David Paton, Michael Stead, Michael Watts and Barry Brook as well as Patricia Mooney (Department of Environment and Heritage), Lynn Pedler (Department of Environment and Heritage), Miguel Araújo (National Museum of Natural Sciences) and Reşit Akçakaya (Stony Brook University). The paper was published in the Journal of Applied Ecology

Download the paper to read about their findings