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Title: Seasonal drought limits tree species across the Neotropics
Authors: Esquivel-Muelbert, Adriane
Baker, Timothy R.
Dexter, Kyle
Lewis, Simon L.
Steege, Hans ter
López González, Gabriela
Monteagudo Mendoza, Abel
Brienen, Roel J. W.
Feldpausch, Ted R.
Pitman, Nigel
Alonso, Alfonso
Heijden, Geertje van der
Peña-Claros, Marielos
Ahuite, Manuel
Alexiaides, Miguel
Álvarez Dávila, Esteban
Murakami, Alejandro Araujo
Arroyo, Luzmila
Aulestia, Milton
Balslev, Henrik
Barroso, Jorcely
Boot, Rene
Cano, Angela
Chama Moscoso, Victor
Comiskey, James A.
Cornejo, Fernando
Dallmeier, Francisco
Daly, Douglas C.
Dávila Cardozo, Nállarett
Duivenvoorden, Joost F.
Duque Montoya, Alvaro Javier
Erwin, Terry
Di Fiore, Anthony
Fredericksen, Todd
Fuentes, Alfredo
García Villacorta, Roosevelt
Gonzales, Therany
Guevara Andino, Juan Ernesto
Honorio Coronado, Eurídice
Huamantupa Chuquimaco, Isau
Killeen Timothy J., Yadvinder Malhi
Mendoza Casimiro, Hugo Mogollón
Jørgensen, Peter Møller
Montero, Juan Carlos
Mostacedo, Bonifacio
Nauray, William
Neill, David
Núñez Vargas, Percy
Palacios, Sonia
Palacios Cuenca, Walter
Pallqui Camacho, Nadir Carolina
Peacock, Julie
Phillips, Juan Fernando
Pickavance, Georgia
Quesada, Carlos Alberto
Ramírez-Angulo, Hirma
Restrepo, Zorayda
Reynel Rodríguez, Carlos
Ríos Paredes, Marcos
Sierra, Rodrigo
Silveira, Marcos
Stevenson, Pablo
Stropp, Juliana
Terborgh, John
Tirado, Miltón
Toledo, Marisol
Torres-Lezama, Armando
Umaña, María Natalia
Urrego, Ligia Estela
Vásquez Martínez, Rodolfo
Valenzuela Gamarra, Luis
Vela, César I. A.
Vilanova Torre, Emilio
Vos, Vincent
Hildebrand, Patricio von
Vriesendorp, Corine
Wang, Ophelia
Young, Kenneth R.
Zartman, Charles Eugene
Phillips, Oliver L.
Peñuela-Mora, Maria Cristina
Keywords: Variedades
Precipitación atmosférica
Variación genética
Biodiversidad forestal
Comunidades vegetales
Estrés de sequía
Cubierta de copas
Composición botánica
Bosque tropical
Clases de árboles
Estación seca
Issue Date: Apr-2016
Publisher: Wiley
Series/Report no.: Ecography; 40(5): 618-629
Abstract: Within the tropics, the species richness of tree communities is strongly and positively associated with precipitation. Previous research has suggested that this macroecological pattern is driven by the negative effect of water‐stress on the physiological processes of most tree species. This implies that the range limits of taxa are defined by their ability to occur under dry conditions, and thus in terms of species distributions predicts a nested pattern of taxa distribution from wet to dry areas. However, this ‘dry‐tolerance’ hypothesis has yet to be adequately tested at large spatial and taxonomic scales. Here, using a dataset of 531 inventory plots of closed canopy forest distributed across the western Neotropics we investigated how precipitation, evaluated both as mean annual precipitation and as the maximum climatological water deficit, influences the distribution of tropical tree species, genera and families. We find that the distributions of tree taxa are indeed nested along precipitation gradients in the western Neotropics. Taxa tolerant to seasonal drought are disproportionately widespread across the precipitation gradient, with most reaching even the wettest climates sampled; however, most taxa analysed are restricted to wet areas. Our results suggest that the ‘dry tolerance' hypothesis has broad applicability in the world's most species‐rich forests. In addition, the large number of species restricted to wetter conditions strongly indicates that an increased frequency of drought could severely threaten biodiversity in this region. Overall, this study establishes a baseline for exploring how tropical forest tree composition may change in response to current and future environmental changes in this region.
ISSN: 9067590
Appears in Collections:Artículos en revistas indexadas

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