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23.11.2018 | Original Paper | Ausgabe 2/2019

Biodiversity and Conservation 2/2019

Identifying hotspots for rare species under climate change scenarios: improving saproxylic beetle conservation in Italy

Zeitschrift:
Biodiversity and Conservation > Ausgabe 2/2019
Autoren:
Francesca Della Rocca, Giuseppe Bogliani, Frank Thomas Breiner, Pietro Milanesi
Wichtige Hinweise
Communicated by Frank Chambers.

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s10531-018-1670-3) contains supplementary material, which is available to authorized users.
This article belongs to the Topical Collection: Forest and plantation biodiversity.

Abstract

Our aim is to model rare species (with few occurrences) but modelling the distribution of species with few occurrence data and many predictor variables leads to model overfitting. Thus, we use the recently developed ensemble of small models, which showed high predictive accuracy in modelling the distribution of rare species to estimate the current and future distribution of 56 rare (and endangered) saproxylic beetle species. Thus, we stacked predictions from individual species distribution models to derive rare species richness. We used current and five future general circulation models and three representative concentration pathways to test whether the distribution of hotspots for rare species shifts due to climate change under different future scenarios. Moreover, we verified the representativeness of existing protected area systems under future climate conditions in Italy. Specifically, we identified potential hotspots for rare species richness through a cumulative relative frequency distribution function. The current surface covered by hotspots is 50.4% of the study area corresponding to 151,223 km2 (mainly from central to northern Italy). Currently, only 35,124 km2 of rare saproxylic hotspots are covered by protected areas (PAs) and they will decrease by about 2–72% in 2070 depending on the future scenarios considered. Our results confirmed that the shift of the distribution of hotspots for rare species might occur due to climate change under different future scenarios and that the existing PAs system would be inadequate for assuring the conservation of rare saproxylic beetles in Italy under current and future climate conditions.

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Zusatzmaterial
Supplementary material 1 (DOCX 699 kb)
10531_2018_1670_MOESM1_ESM.docx
Literatur
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