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Issue: Vol. 609 No. 3: 24 Aug. 2023
Type: Article
Published: 2023-08-24
DOI: 10.11646/phytotaxa.609.3.2
Page range: 180-194
Abstract views: 196
PDF downloaded: 21

Richness and endemism in Chusquea subg. Swallenochloa (Poaceae), a Neotropical subgenus adapted to temperate conditions

Departamento de Botánica y Zoología; Centro Universitario de Ciencias Biológicas y Agropecuarias; Universidad de Guadalajara. Camino Ramón Padilla Sánchez 2100; Nextipac; Zapopan; Jalisco 45200; Mexico; Laboratorio Nacional de Identificación y Caracterización Vegetal (LaniVeg). Instituto de Botánica; Univerisdad de Guadalajara; Camino Ramón Padilla Sánchez 2100; Nextipac; Zapopan; Jalisco 45200; Mexico
Laboratorio Nacional de Identificación y Caracterización Vegetal (LaniVeg). Instituto de Botánica; Univerisdad de Guadalajara; Camino Ramón Padilla Sánchez 2100; Nextipac; Zapopan; Jalisco 45200; Mexico; Cátedras CONAHCyT-Universidad de Guadalajara; Departamento de Botánica y Zoología; Centro Universitario de Ciencias Biológicas y Agropecuarias; Universidad de Guadalajara. Camino Ramón Padilla Sánchez 2100; Nextipac; Zapopan; Jalisco 45200; Mexico
Universidade Estadual de Feira de Santana; Departamento de Ciências Biológicas; Programa de Pós-Graduação em Botânica; Av. Transnordestina; s/n; Novo Horizonte; 44036-900; Feira de Santana; Bahia; Brazil
Instituto Jardín Botánico de Mérida; Facultad de Ciencias; Universidad de Los Andes; Mérida 5101; Venezuela
Department of Ecology; Evolution; and Organismal Biology; 251 Bessey Hall; Iowa State University; Ames; Iowa 50011-4009; USA
Monocots Andes Bamboo diversity and endemism Brazilian highlands Central America Mexico Páramos

Abstract

Chusquea subg. Swallenochloa comprises 52 species distributed in five biogeographical areas (Mexican Transition Zone, Brazilian subregion, South American Transition Zone, Chacoan subregion, and Andean region). Species of the subgenus grow from almost sea level in the Andean region to almost 4000 m in the northern South American Transition Zone (SATZ) and are often common or dominant elements of the vegetation. In this study, three questions related to species richness, endemism, and risk category of Chusquea subg. Swallenochloa were addressed. Analyses were based on the geo-referenced occurrence data of these 52 species, using different methods and software programs. Results indicate that the Chacoan subregion and SATZ had the highest richness with 16 and 15 species, respectively. The area of highest endemism was found in the Brazilian subregion. The AOO and EOO methods provided strongly differing estimations of conservation status.

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