Diversity of saxicolous lichens along an aridity gradient in central México
- Author:
- Soto-Correa J.C., Saldaña-Vega A., Cambrón-Sandoval V.H., Concostrina-Zubiri L. & Gómez-Romero M.
- Year:
- 2022
- Journal:
- Phyton - International Journal of Experimental Botany
- Pages:
- 91(4): 827–840
- Url:
- DOI: 10.32604/phyton.2022.017929
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.
Keywords: Climate change; drylands; ecological indicators; environmental stress; precipitation; temperature.
- Id:
- 34216
- Submitter:
- zdenek
- Post_time:
- Monday, 07 March 2022 23:37