Open Access

ARTICLE

Diversity of Saxicolous Lichens along an Aridity Gradient in Central México

by José Carmen Soto-Correa¹, Abraham Saldaña-Vega¹, Víctor Hugo Cambrón-Sandoval¹, Laura Concostrina-Zubiri², Mariela Gómez-Romero^3,*

1 Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Querétaro, 73230, México
2 Departamento de Biología y Geología, Física y Química Inorgánica Tulipán s/n, Universidad Rey Juan Carlos, Móstoles, Madrid, 28933, España
3 Cátedra CONACYT–Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, 58030, México

* Corresponding Author: Mariela Gómez-Romero. Email:

(This article belongs to the Special Issue: The Effect of Soil Quality Degradation on the Plant Growth, Quality and Food Safety in Subtropical Agroforestry Ecosystems)

Phyton-International Journal of Experimental Botany 2022, 91(4), 827-840. https://doi.org/10.32604/phyton.2022.017929

Received 17 June 2021; Accepted 23 September 2021; Issue published 09 December 2021

Abstract

Lichens are symbiotic organisms that comprise a fungus and a photosynthetic partner wich are recognized as a good indicator of climate change. However, our understanding of how aridity affects the diversity of saxicolous lichens in drylands is still limited. To evaluate the relationship between saxicolous lichen diversity and aridity in a central México dryland, a geographical transect was established of 100 km to build an aridity gradient in the semiarid zone of the State of Querétaro, Mexico, comprising ten sampling sites with a 10 km separation. Species richness, abundance and diversity of soil lichen species were recorded using two sampling methods: the quadrat-intercept and the line-intercept method, to compare their performance in assessing soil lichen diversity in drylands. The number of species and Shannon diversity of saxicolous lichens were higher at intermediate values of the aridity index (AI = 0.10–0.34). Quadrat intercept and point intercept methods gave quite similar results, which means that the selected method does not influence the results in a significant way. This study confirms the role of saxicolous lichens as climate change indicators and reveals the importance of the sampling method selection in the evaluation of different parameters of soil lichen diversity in drylands.

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Keywords

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