Macrolichens from Chaco National Park (Chaco Province, Argentina)

María Pía Rodríguez,Andrea Michlig

doi:10.1590/2175-7860202172067

María Pía Rodríguez, Andrea Michlig

Open Access

https://doi.org/10.1590/2175-7860202172067

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Abstract

Abstract A study of the macrolichens diversity from Chaco National Park was conducted. Thirty-six species were identified, three of which are recorded for the first time from Argentina (Dirinaria melanocapa, Pyxine petricola var. convexula, and P. pungens). Moreover, the distribution of 27 species in the country is extended, including new records for Chaco province and, additionally, for other provinces of the region. An identification key for species is here provided and the geographic distribution of each one in Argentina was revised.

Highlights

Chaquenian region, together with Paranaense and Yungas forests, constitutes the three ecoregions with the highest biological diversity in the Argentinean territory (Guinzburg et al 2005)
And that the lichen diversity is still poorly known in Chaco Province, with only ca. 50 species recorded so far (Calvelo & Liberatore 2002; Adler & Calvelo 2010; Rodríguez et al 2012; Michlig 2014; Michlig et al 2017)
CNP is located in the center-eastern region of Chaco province, in Sargento Cabral and Presidencia de la Plaza departments (26o40’S, 59o48’W)

Summary

Introduction

Chaquenian region, together with Paranaense and Yungas forests, constitutes the three ecoregions with the highest biological diversity in the Argentinean territory (Guinzburg et al 2005). Chaco National Park (CNP hereafter), located within Eastern Chacoan district (or Humid Chaco), was created in 1954 considering its flora and fauna representative of this phytogeographical region (Caruso 2015). Vegetational types in this area are conditioned by flood gradient (Guinzburg & Adámoli 2006), encompassing a wide variety of natural landscapes: xerophytic forests, palm groves, savannahs, and marginal forests, which alternate with wetlands and swamps; all of them having different ecological conditions where diverse lichen groups could develop.

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