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An exotic woody weed in a pastoral landscape provides habitat for many native species, but has no apparent threatened species conservation significance

journal contribution
posted on 2023-05-19, 23:58 authored by Ranyard, C, James KirkpatrickJames Kirkpatrick, Christopher JohnsonChristopher Johnson, Leon BarmutaLeon Barmuta, Menna JonesMenna Jones
Exotic woody plants are often used by native organisms, but may also be targets of expensive control justified by nature conservation. We determine the use of a weed of national significance, Gorse (Ulex europaeus L.), by native mammals, birds, reptiles and vascular plants in pastoral areas in an Australian biodiversity hotspot. Large numbers of fauna species were observed using Gorse within our 43 × 1 ha sample sites in riparian, woodland and pasture vegetation. Gorse cover and/or height positively influenced: the detection of mammals as a whole in an interaction with visibility at 50-75 cm above ground, but not their species richness or individual species abundances; bird abundance, but not richness; and, reptile richness but not abundance. In terms of flora, Gorse cover and/or height positively affected: non‐native plant species richness and the height and fecundity, but not the richness, of native grasses and forbs - but Gorse cover negatively influenced the height of native herbs. The only species of conservation significance using Gorse were three mammals, only one of which, the Tasmanian Pademelon (Thylogale billardieri), was sufficiently common to analyse. Its abundance had no relationship with Gorse cover or height. Even in the wider context of complementary work, there is no strong threatened species conservation justification for retaining Gorse thickets in the Northern Midlands pastoral landscape. Equally, expending scarce conservation resources to remove Gorse, as is taking place, is unlikely to achieve any threatened species conservation outcome but may help reduce long‐term loss of native animal and plant species.

Funding

Australian Research Council

Greening Australia (TAS) Ltd

History

Publication title

Ecological Management and Restoration

Volume

19

Pagination

212-221

ISSN

1442-7001

Department/School

School of Natural Sciences

Publisher

Wiley-Blackwell Publishing

Place of publication

United Kingdom

Rights statement

Copyright 2018 Ecological Society of Australia and John Wiley & Sons Australia, Ltd.

Repository Status

  • Restricted

Socio-economic Objectives

Assessment and management of Antarctic and Southern Ocean ecosystems; Control of pests, diseases and exotic species in terrestrial environments; Terrestrial biodiversity