Patch size and breeding status influence movement patterns in the threatened Malleefowl (Leipoa ocellata)
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Published:2023-03-27
Issue:5
Volume:48
Page:904-927
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ISSN:1442-9985
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Container-title:Austral Ecology
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language:en
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Short-container-title:Austral Ecology
Author:
Stenhouse Peri1ORCID,
Moseby Katherine E.1ORCID
Affiliation:
1. School of Earth and Environmental Sciences The University of Adelaide Adelaide South Australia Australia
Abstract
AbstractInformation on the movement ecology of species can assist with identifying barriers to dispersal and appropriate management actions. We focus on the threatened Malleefowl (Leipoa ocellata) whose ability to move and disperse within fragmented landscapes is critical for their survival. We also investigate the possible effects of climate change on Malleefowl movement. We used solar‐powered GPS telemetry to collect movement data and determine the influence of breeding status, remnant vegetation patches and environmental variables. Seven Malleefowl were tracked between 1 and 50 months, resulting in 20 932 fixes. While breeding, Malleefowl had significantly smaller home ranges (92 ± 43 ha breeding; 609 ± 708 ha non‐breeding), moved shorter daily distances (1283 ± 605 breeding; 1567 ± 841 non‐breeding) and stayed closer to the incubation mound (349 ± 324 m breeding; 3293 ± 2715 m non‐breeding). Most Malleefowl effectively disassociated from the mound once breeding stopped, with two birds dispersing up to 10.2 km. Movement patterns were significantly correlated with the size of the remnant native vegetation patch, with smaller home ranges being utilized in small patches than in large patches. One male almost exclusively remained within a 107‐ha patch for over 4 years, but a female crossed between closely spaced uncleared patches. Long‐range movements of nearly 10 km daily displacement were recorded in large remnants almost exclusively when not breeding. Temperature and rain had a significant effect on movement: modelling suggests daily distances decline from 1.3 km at 25°C to 0.9 km at 45°C, with steeper declines over 30°C. The influence of patch size on movement patterns suggests that Malleefowl movement may be governed by the size of remnant patches and that habitat continuity may be important for facilitating recolonization after catastrophic events and maintaining genetic diversity. Climate change may reduce Malleefowl movement during hot, dry periods possibly affecting breeding success.
Funder
Australian Government
BirdLife Australia
Ecological Society of Australia
Nature Foundation SA
University of Adelaide
Subject
Ecology,Ecology, Evolution, Behavior and Systematics
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