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Monitoring the impacts of feral Horses on vegetation condition using remotely sensed fPAR: a case study in Australia's alpine parks

Citation

Porfirio, LL and Lefroy, T and Hugh, S and Mackey, B, Monitoring the impacts of feral Horses on vegetation condition using remotely sensed fPAR: a case study in Australia's alpine parks, Parks, 23, (2) pp. 9-20. ISSN 0960-233X (2017) [Refereed Article]


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Copyright Statement

Copyright 2017 IUCNparksjournal

DOI: doi:10.2305/IUCN.CH.2017.PARKS-23-2LLP.en

Abstract

Throughout the world, feral horses (Equus caballus) are causing environmental degradation and a decline in ecological integrity. Evidence from scientific monitoring is needed to inform the public debate and help land managers make informed decisions. We used field observations of vegetation condition at a network of sites in the Australian Alps where horses were present or absent. The data were combined with the remotely -sensed fraction of photosynthetic active radiation (fPAR) and topographic condition. Vegetation condition was assessed in the field by rangers using a modified version of the Landscape Function Analysis (LFA) index. We found significant differences in the LFA index between sites where horses were present or absent. Sites with presence of horses have 10 per cent lower fPAR than sites with absence of horses. The results also indicated a significant correlation between LFA and fPAR. Our analysis supports the hypothesis that feral horses have a negative impact on the condition of Australian alpine vegetation. This study provides a useful and relatively cost-effective method for monitoring the impact of feral horses on native vegetation, and can be used to support decision making and management interventions.

Item Details

Item Type:Refereed Article
Keywords:vegetation condition, landscape function analysis, Australian Alps, decision tree, recursive partitioning
Research Division:Environmental Sciences
Research Group:Environmental Science and Management
Research Field:Conservation and Biodiversity
Objective Division:Environment
Objective Group:Remnant Vegetation and Protected Conservation Areas
Objective Field:Remnant Vegetation and Protected Conservation Areas in Mountain and High Country Environments
Author:Lefroy, T (Professor Ted Lefroy)
ID Code:124803
Year Published:2017
Deposited By:Centre for Environment
Deposited On:2018-03-09
Last Modified:2018-06-22
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