Understory spider diversity in two remnants of tropical montane cloud forest in Chiapas, Mexico |
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Authors: | Julieta Maya-Morales Guillermo Ibarra-Nú?ez Jorge L León-Cortés Francisco Infante |
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Institution: | (1) Departamento de Entomolog?a Tropical, El Colegio de la Frontera Sur, Carr. Antiguo Aeropuerto km 2.5, Tapachula, 30700 Chiapas, Mexico;(2) Departamento de Ecolog?a y Sistem?tica Terrestre, El Colegio de la Frontera Sur, Carr. Panamericana y Av. Perif?rico Sur S/N, San Crist?bal de las Casas, 29290 Chiapas, Mexico; |
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Abstract: | We evaluated the spider diversity of a tropical montane cloud forest understory in two nearby sites with different degree
of human disturbance at the Biosphere Reserve Volcán Tacaná, Chiapas, Mexico. The study was conducted over a 24 days period
distributed in 6 months in 2009, covering dry and rainy seasons. A total of 8,370 spiders (1,208 adults and 7,162 juveniles)
were collected. Determined specimens (7,747) represented 112 species and morphospecies, 71 genera and 22 families. The results
showed that human disturbance has an influence on spider communities: species richness was significantly higher in the preserved
site as regards to the disturbed site. Despite their proximity, the composition of spider communities showed only a moderate
similarity between the two sites. No differences in abundance were found among sites when considering the whole sample, but
sites differed clearly when seasons were analyzed separately. The rainy season had a negative effect on the abundance of spiders
in the preserved site. Although the spider community structure was very similar between sites, there was a trend towards a
greater species evenness in the preserved site for the whole sampling period and for the dry season. |
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