Factors Influencing the Distribution of Freshwater Mollusks in the Lakes of the Pyrenees : Implications in a Shifting Climate Scenario
de Mendoza, Guillermo (Centro de Estudios Avanzados de Blanes)
Araujo, Rafael (Museo Nacional de Ciencias Naturales (Madrid, Espanya))
Catalán, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2023
Resum:	Climate warming is expected to drive an upward altitudinal shift of species distributions in mountain areas. In this study, we consider how environmental variables constrain the distribution of freshwater mollusks across elevations based on an extensive survey of the entire Pyrenean range. Results show that several altitude-related variables are significantly relevant for the distribution of all mollusks (i. e. , temperature, sediment organic content). Others respond more precisely to some variables: fine substrate proportion increases the probability of finding Pisidium sensu lato (mostly Euglesa species), and the latter, the macrophyte presence, and Ampullaceana balthica. Despite the low acid-neutralizing capacity in many of the lakes, only the distribution of A. balthica was significantly constrained by this factor, independent from elevation. The results confirm a likely altitudinal expansion of the distributions of all species, particularly toward lakes with a summer surface temperature increasing above 12 °C. The pace of change is expected to differ among species according to different nonlinear thresholds in thermal response, which temperature value increases from Pisidium s. l. to Ampullaceana to Ancylus, and the taxon-specific sensitivity to substrates and chemical conditions.
Ajuts:	Agencia Estatal de Investigación PID2019-111137GB-C21
Nota:	Altres ajuts: European Council, FP5-EESD-grant number EVK1-CT-1999-00032 (EMERGE)
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Freshwater mollusks ; Mountain lakes ; Upward distributional shift ; Acid neutralizing capacity ; Climate warming
Publicat a:	Diversity, Vol. 15, Issue 4 (April 2023) , art. 500, ISSN 1424-2818

DOI: 10.3390/d15040500

17 p, 3.2 MB

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