DIVERSIDAD DE HELECHOS Y LICÓFITOS EN FRAGMENTOS DE SELVA MEDIANA SUBPERENNIFOLIA DEL SUR DE TABASCO, MÉXICO
DIVERSIDAD DE HELECHOS Y LICÓFITOS EN FRAGMENTOS DE SELVA MEDIANA SUBPERENNIFOLIA DEL SUR DE TABASCO, MÉXICO
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墨西哥塔巴斯科南部的 SELVA MEDIANA SUBPERENNIFOLIA DIVERSIDAD DE HELECHOS Y LICÓFITOS EN FRAGMENTOS
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发表时间：
2013
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通讯作者：
Y. N. Ramírez
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作者：
W. Cetzal;Eliana Noguera;Miguel Martínez;Y. N. Ramírez
虽然塔巴斯科90%以上的领土都被砍伐，但在塔科塔尔帕的一些半常绿森林片段中有48个蕨类植物和石松植物分类群。它们对应于蕨类植物的43种、一变种和一种形式，以及石松植物的3种，分为28属和17科。这种丰富性代表了塔巴斯科蕨类植物和石松植物的36%的分类群，57%的属和63%的科。我们发现了该州的八个新记录（七种蕨类植物和一种石松植物）。这些增加增加了塔巴斯科的蕨类植物124种，一个亚种，六个变种和两个形式。种类最多的属是铁线蕨属（5）、铁角蕨属（5）和金星蕨属（4）。生活型方面，陆生22种1变型，附生7种1变种，陆生或岩生12种，附生或岩生2种，攀缘3种。物种数量最多的地方是La Pila（34），其次是Tomas Garrido（23），Oxolotan（19）和Grutas de Kolem Chen（15）。在半常绿森林片断内部观察到的物种数量最多（45），其次是半常绿森林片断的边缘（33）和次生植被（17）。在另一方面，14种只观察到在半常绿森林片段的内部和半常绿森林片段的边缘上的一个物种。此外，30种都存在于内部和边缘的半常绿森林片段和14种在三种植被类型。物种的丰富性证明了这些稀缺的片段半常绿森林的蕨类植物和石松有效的避难所的重要性。
Although over 90% of the territory of Tabasco is deforested, there were 48 taxa of ferns and lycophytes in a few semier- vergreen forest fragments in Tacotalpa. These correspond to 43 species, one variety, and one form of ferns, and three species of lycophytes, grouped in 28 genera and 17 families. This richness represents 36% of the taxa, 57% of genera, and 63% of the families of the fl ora of ferns and lycophytes of Tabasco. We found eight new records for the state (seven ferns and one lycophyte). These additions increase the pteridofl ora of Tabasco to 124 species, one subspecies, six varieties, and two forms. The genera with the largest number of species are Adiantum (5), Asplenium (5), and Thelypteris (4). As regards to life form, 22 species and one form are terrestrial, seven species and one variety are epiphytic, 12 species are terrestrial or epipetric, two species are epiphytic or epipetric, and three species are scandent. The locality with the largest number of species is La Pila (34), followed by Tomas Garrido (23), Oxolotan (19), and Grutas de Kolem Chen (15). The greatest number of species was observed in the interior of the semievergreen forest fragments (45), followed by the margins of the semievergreen forest fragments (33), and secondary vegetation (17). On the other hand, 14 species were observed only in the interior of the semievergreen forest fragments and one species on the margins of the semievergreen forest fragments. Furthermore, 30 species are present both at the interior and margins of the semievergreen forest fragments and 14 species in the three vegetation types. The species richness evidences the importance of these scarce fragments of semievergreen forest as effective refuge for the ferns and lycophytes.