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Surrogate species versus landscape metric: does presence of a raptor species explains diversity of multiple taxa more than patch area?

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Abstract

Prioritizing conservation areas is a central theme in conservation biology. The use of surrogate species and landscape metrics to identify areas with high conservation value is common. However, few studies have examined the relative efficacy of these two surrogates. In this study, we compared the efficacy of the presence/absence (PA) of a top predator (Eastern Marsh Harrier, Circus spilonotus) and wetland patch area on species richness, total abundance, and community composition of birds, plants, and small mammals, but species richness and community composition only for plants, in a fragmented wetland landscape. Although harrier PA was an effective indicator of the distribution of birds, it had no significant efficacy on the distributions of plants and small mammals. Patch area was more effective indicator of the distributions of plants and small mammals. These results suggest that surrogate species can be more effective indicators than landscape surrogates when there are ecological linkages between surrogate species and the focal taxa (e.g., similarity of habitat requirements between surrogate species and focal taxa or hetero-specific attraction). On the other hand, landscape surrogates would be useful when ecological knowledge about the relationships is limited.

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Acknowledgments

We thank T. Shimazaki and T. Namba for their field support and Tomatoh, the Yufutsu Mill of Nippon Paper Industries, and H. Honda for their logistical support. Dr. F. Nakamura, Dr. J. Morimoto, and an anonymous referee provided valuable comments on the early version of the manuscript.

Funding

MS was supported by JSPS KAKENHI Grant Number 14J05368 and YY by JSPS KAKENHI Grant Number 23248021.

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Correspondence to Masayuki Senzaki.

Appendix

Appendix

See Table 3.

Table 3 Results of model selection. “Weight” indicates “Akaike weight”

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Senzaki, M., Yamaura, Y. Surrogate species versus landscape metric: does presence of a raptor species explains diversity of multiple taxa more than patch area?. Wetlands Ecol Manage 24, 427–441 (2016). https://doi.org/10.1007/s11273-015-9469-4

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  • DOI: https://doi.org/10.1007/s11273-015-9469-4

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