RT info:eu-repo/semantics/article
T1 An island view of endemic rarity—Environmental drivers and consequences for nature conservation
A1 Irl, Severin D.H.
A1 Schweiger, Andreas H.
A1 Medina, Félix M.
A1 Fernández-Palacios, José María
A1 Harter, David E. V.
A1 Jentsch, Anke
A1 Provenzale, Antonello
A1 Steinbauer, Manuel J.
A1 Beierkuhnlein, Carl
K1 corrected weighted endemism
K1 conservation biogeography
K1 endemic plant species
K1 evolutionary pattern
K1 hypervolume
K1 island ecology
K1 Natura 2000
K1 protected areas
K1 biogeografía de la conservación
K1 especies de plantas endémicas
K1 patrones evolutivos
K1 hipervolumen
K1 ecología insular
K1 áreas protegidas
AB Aim: Rarity—an important measure for conservation biogeography—can vary overmany orders of magnitude. However, it is unclear which regional-scaleabiotic conditionsdrive processes affecting rarity of endemic species on islands. To support conservationefforts, we (1) assess the main abiotic drivers of endemic rarity, (2) determinehow well existing protected areas (PAs) coincide with hotspots of endemic rarity and(3) introduce and evaluate a new hypervolume-basedrarity estimator.Location: La Palma (Canary Islands).Methods: We recorded all present endemic vascular plant species in 1,212 plots coveringthe entire island. We calculated endemic rarity (corrected range-rarityrichnessfor endemics) using a rarity estimation approach based on kernel density estimations(hypervolume approach). We performed a sensitivity analysis based on multiple linearregressions and relative importance estimations of environmental drivers to estimatethe performance of the hypervolume-basedrarity estimation compared to standardmethods (occurrence frequency, convex hulls, alpha hulls).Results: Climate variables (mean annual temperature, climatic rarity, precipitation variability)best explained archipelago endemic (AE) and single-islandendemic (SIE) rarity.Existing PAs covered the majority of AE and SIE rarity, especially national and naturalparks as well as the Natura 2000 sites. In our study system, hypervolumes performedbetter than standard measures of range size.Main conclusion: Both AE and SIE rarity on La Palma show a clear spatial pattern, withhotspots of endemic rarity found at high elevations and in rare climates, presumablyowing to geographical and climatic constraints and possibly anthropogenic pressure(e.g., land use, introduced herbivores, fire). Areas of high rarity estimates coincide withthe distribution and extent of PAs on La Palma, especially since the recent addition ofthe Natura 2000 sites. The hypervolume approach is a promising tool to estimate speciesrange sizes, and can be applied on all scales where point/plot data are available.
PB Wiley
YR 2017
FD 2017
LK http://riull.ull.es/xmlui/handle/915/18456
UL http://riull.ull.es/xmlui/handle/915/18456
LA en
NO European Union
DS Repositorio institucional de la Universidad de La Laguna
RD 21-dic-2024