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Woodland habitat structures are affected by both agricultural land management and abiotic conditions

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Abstract

Context

The identification of habitat structures with biologically meaningful links to habitat quality has enabled an increased understanding of wildlife distributions in fragmented landscapes. However, knowledge is lacking of where these structures occur in the landscape.

Objectives

For a broad-scale agricultural landscape, we investigated how the occurrence and abundance of wildlife habitat structures is related to abiotic conditions and land management practices, and whether this differed between old growth and regrowth woodland.

Methods

We used generalised linear mixed models to investigate the distribution of eight habitat structures in the South-West Slopes bioregion of south-eastern Australia.

Results

Only one habitat structure, canopy depth, was related to abiotic conditions alone, whereas only leaf litter cover was related to land management practices only. Each of the other structures (abundance of logs, large trees, hollow-bearing trees, mid-sized trees and dead trees, and amount of native grass cover) was related to a combination and/or interaction of abiotic conditions and land management practices. Old growth woodland had higher log, large tree and hollow-bearing tree abundance, whereas regrowth woodland had higher mid-sized tree and dead tree abundance.

Conclusions

Our findings inform key management prescriptions that can be used to improve conservation efforts so they have strong, quantifiable effects on wildlife habitat in temperate agricultural landscapes. Our case study shows that by understanding how management actions in specific abiotic conditions lead to the increased occurrence or abundance of particular habitat structures, management can be spatially targeted to alternative conservation strategies relevant to the landscape of interest.

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Acknowledgments

We thank the Australian Research Council, the Murray Catchment Management Authority and the Caring for Our Country Program for funding for this project. We thank C. MacGregor, L. McBurney, D. Blair and S. Lucas for their important contribution to the collection of the field data, A. Smith for her patient help with R code, J. Newport for her generous assistance with preparing Fig. 3, and I. Stirnemann for her valuable feedback on the manuscript.

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Authors and Affiliations

  1. Fenner School of Environment and Society, Australian Research Council Centre for Environmental Decisions, National Environmental Research Program, The Australian National University, Acton, ACT, 2601, Australia

    Karen Ikin, Alessio Mortelliti, John Stein, Damian Michael, Mason Crane, Sachiko Okada, Jeff Wood & David Lindenmayer

  2. Frank Fenner Building 141, Linnaeus Way, Canberra, ACT, 0200, Australia

    Mason Crane

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  1. Karen Ikin
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  2. Alessio Mortelliti
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Correspondence to Karen Ikin or Mason Crane.

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Ikin, K., Mortelliti, A., Stein, J. et al. Woodland habitat structures are affected by both agricultural land management and abiotic conditions. Landscape Ecol 30, 1387–1403 (2015). https://doi.org/10.1007/s10980-015-0193-5

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