TY - JOUR
T1 - 400 years for long-distance dispersal and divergence in the northern Atacama desert - Insights from the Huaynaputina pumice slopes of Moquegua, Peru
AU - Schwarzer, Christian
AU - Huamaní, Fatima Cáceres
AU - Cano Echevarria, Asuncion Alipio
AU - La Torre, María I.
AU - Weigend, Maximilian
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010/11
Y1 - 2010/11
N2 - The Huaynaputina eruption (1600 AD, Moquegua, S Peru) in the northern Atacama Desert denuded the Omate area of all vegetation and deposited deep pumice layers. Data on the flora, climate and soil characteristics of these slopes near Omate at 1600-2600 m a.s.l. are provided. Fifty-nine angiosperm species established themselves on the pumice slopes in the past ca. 400 years, with the bulk of the small and herbaceous species and several species new records for Peru. Three Omate sites were sampled in both a dry and a wet year and species numbers differed widely (14 versus 45 spp.). Among areas compared floristic composition is most similar to the Lomas de Tacna, and has less in common with geographically closer Lomas or Sierra formations. Nine species represent highly disjunct populations (200->700 km) from their nearest known living populations in central Peru, Chile, or Argentina/Bolivia and appear to have reached the area via long-distance dispersal. Abiotic conditions may have played an important role in limiting the establishment of species from the neighboring vegetation. Four taxa on the pumice slopes show clear morphological differences to populations elsewhere, two of them may represent neoendemics of the Omate pumice, indicating rapid morphological divergence.
AB - The Huaynaputina eruption (1600 AD, Moquegua, S Peru) in the northern Atacama Desert denuded the Omate area of all vegetation and deposited deep pumice layers. Data on the flora, climate and soil characteristics of these slopes near Omate at 1600-2600 m a.s.l. are provided. Fifty-nine angiosperm species established themselves on the pumice slopes in the past ca. 400 years, with the bulk of the small and herbaceous species and several species new records for Peru. Three Omate sites were sampled in both a dry and a wet year and species numbers differed widely (14 versus 45 spp.). Among areas compared floristic composition is most similar to the Lomas de Tacna, and has less in common with geographically closer Lomas or Sierra formations. Nine species represent highly disjunct populations (200->700 km) from their nearest known living populations in central Peru, Chile, or Argentina/Bolivia and appear to have reached the area via long-distance dispersal. Abiotic conditions may have played an important role in limiting the establishment of species from the neighboring vegetation. Four taxa on the pumice slopes show clear morphological differences to populations elsewhere, two of them may represent neoendemics of the Omate pumice, indicating rapid morphological divergence.
KW - Climate
KW - Loma
KW - Moquegua
KW - Peru
KW - Pumice
KW - Sierra
KW - Similarity analysis
KW - Speciation
UR - http://www.scopus.com/inward/record.url?scp=77956225397&partnerID=8YFLogxK
U2 - 10.1016/j.jaridenv.2010.05.034
DO - 10.1016/j.jaridenv.2010.05.034
M3 - Artículo
AN - SCOPUS:77956225397
VL - 74
SP - 1540
EP - 1551
JO - Journal of Arid Environments
JF - Journal of Arid Environments
SN - 0140-1963
IS - 11
ER -