Pteridofitas indicadoras de alteración ambiental en el bosque templado de San Jerónimo Amanalco, Texcoco, México

Romero, Lucía Rodríguez; Pacheco, Leticia; Hurtado, José Alejandro Zavala
June 2008
Revista de Biología Tropical;jun2008, Vol. 56 Issue 2, p641
Academic Journal
Pteridophytes that indicate environmental alteration in the San Jerónimo Amanalco temperate forest, Texcoco, Mexico. The patterns of distribution of 26 pteridophyte species were studied as possible indicators of environmental alteration in the temperate forest of San Jerónimo Amanalco, Texcoco, State of Mexico. The presence and abundance of the pteridoflora was studied in relation to edaphic, topographic and vegetation variables in 100 sampling locations within an area of 494 hectares. The relationship between these variables was studied using Canonical Correspondence Analysis. Five landscapes were recognized in the study zone according to the degree of deterioration: severe erosion, erosion, mountain with moderate reversible deterioration, mountain with no evident deterioration, and canyon with no evident deterioration. Cheilanthes bonariensis and Pellaea ternifolia are indicators of environmental degradation. The taxa that only grow in landscapes without apparent alteration are Adiantum andicola, Adiantum poiretii, Argyrochosma incana, Asplenium blepharophorum, Dryopteris pseudo filix-mas, Equisetum hyemale and Pteris cretica.


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