TY - JOUR
T1 - Biogeographic analysis of the American genus Echeandia (Agavoideae: Asparagaceae)
AU - Ortiz-Brunel, Juan Pablo
AU - Munguía-Lino, Guadalupe
AU - Castro-Castro, Arturo
AU - Rodríguez, Aarón
N1 - Publisher Copyright:
© 2021 Universidad Nacional Autonoma de Mexico. All rights reserved.
PY - 2021/10
Y1 - 2021/10
N2 - Echeandia (Asparagaceae) is an American genus of herbaceous geophytes. Its distribution is heterogeneous but concentrates along the Mexican Transition Zone (MTZ). We analyzed the species richness distribution and endemism of the group. We compiled a data base of 2,078 records obtained by revision of herbarium specimens, scientific publications, and electronic databases. Species richness was quantified under 4 different criteria. Also, we estimated the weighted endemism and the corrected weighted endemism index to detect centers of endemism. We identified 85 species and registered 74 in Mexico. The MTZ had 61 species and the Sierra Madre del Sur province was the most diverse with 39. The richest cell was located in the Transmexican Volcanic Belt and contained 12 species. In addition, 63 species (85.1%) present in Mexico were endemic. Weighted endemism showed 5 cells in the Sierra Madre del Sur and Balsas Basin in Mexico. In contrast, almost all the high valued cells of corrected weighted endemism index were located in South America. The results were congruent with the patterns of the geophytes and endemic angiosperms of Mexico. The MTZ has a complex tectonic, volcanic and climatic history. These factors have promoted the diversification of several angiosperm lineages, including Echeandia.
AB - Echeandia (Asparagaceae) is an American genus of herbaceous geophytes. Its distribution is heterogeneous but concentrates along the Mexican Transition Zone (MTZ). We analyzed the species richness distribution and endemism of the group. We compiled a data base of 2,078 records obtained by revision of herbarium specimens, scientific publications, and electronic databases. Species richness was quantified under 4 different criteria. Also, we estimated the weighted endemism and the corrected weighted endemism index to detect centers of endemism. We identified 85 species and registered 74 in Mexico. The MTZ had 61 species and the Sierra Madre del Sur province was the most diverse with 39. The richest cell was located in the Transmexican Volcanic Belt and contained 12 species. In addition, 63 species (85.1%) present in Mexico were endemic. Weighted endemism showed 5 cells in the Sierra Madre del Sur and Balsas Basin in Mexico. In contrast, almost all the high valued cells of corrected weighted endemism index were located in South America. The results were congruent with the patterns of the geophytes and endemic angiosperms of Mexico. The MTZ has a complex tectonic, volcanic and climatic history. These factors have promoted the diversification of several angiosperm lineages, including Echeandia.
KW - Geophyte
KW - Mexican transition zone
KW - Sierra madre del sur
KW - Species richness
UR - http://www.scopus.com/inward/record.url?scp=85120073057&partnerID=8YFLogxK
U2 - 10.22201/IB.20078706E.2021.92.3739
DO - 10.22201/IB.20078706E.2021.92.3739
M3 - Artículo
AN - SCOPUS:85120073057
SN - 1870-3453
VL - 92
JO - Revista Mexicana de Biodiversidad
JF - Revista Mexicana de Biodiversidad
M1 - e923739
ER -