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β-Diversity partitioning of moth communities within and between different forest types

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Abstract

The partitioning of β-diversity is a recurrent practice in biogeographic and ecological studies that can provide key insights for land management, such as identification of biodiversity hot-spots. In this study, we used Baselga’s metrics to measure the contribution of spatial turnover (βsim) and nestedness-resultant dissimilarity (βnes) to overall β-diversity (βsor) within- and between-forest types. We analyzed a presence/absence dataset concerning 593 species of nocturnal Lepidoptera sampled within chestnut, silver fir, beech, and black pine forests of southern Italy. Ordination methods and analysis of similarities were used to assess the relative contribution of βsim and βnes to βsor, and to assess their relationships with variables linked to the experimental design and known to be determinant for insect diversity and abundance. We found that βsor was mostly due to turnover, around 98.5% in β-diversity assessment of the whole sample, and around 91% in β-diversity assessment of individual forests. Using ordination analyses based on βsim, stands were grouped according to forest type, while βnes alone was used to ordinate stands coherently with their species richness. Nevertheless, the addition of βnes to βsim produced a more ecologically coherent grouping of stands within individual forest types, and βnes alone was able to recognize patterns determined by human disturbance. In conclusion, we demonstrate that β-diversity partitioning can help to detect differences in magnitude and role of processes determining the composition of forest moth communities as in different forests the same pattern can be due to opposite processes, providing strong ecological insights into managing forest biodiversity.

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Acknowledgments

We would like to thank the Pollino National Park, the Sila National Park, and the Serre Natural Park for allowing us to perform our study. We would also like to thank Anthony Green for assisting with the final language edit.

Funding

The work was financially supported by the Project “ALForLab” (PON03PE_00024_1), which is co-funded by the National Operational Programme for Research and Competitiveness (PON R and C) 2007–2013 through the European Regional Development Fund (ERDF) and a national resource (Revolving Fund – Cohesion Action Plan (CAP) MIUR).

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The authors declare that they have no conflict of interest.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Communicated by: Matthias Waltert

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Electronic supplementary material

Online Resource 1

Description of investigated areas. (XLSX 18 kb)

Online Resource 2

R script for simulating the processes. (TXT 7 kb)

Online Resource 3

Community matrix (“Db_PA_tot”) and environmental variables matrix (“Var_tot”). (XLSX 147 kb)

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Ienco, A., Dapporto, L., Greco, S. et al. β-Diversity partitioning of moth communities within and between different forest types. Sci Nat 107, 8 (2020). https://doi.org/10.1007/s00114-020-1665-2

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  • DOI: https://doi.org/10.1007/s00114-020-1665-2

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