diversity of springtails (hexapoda) according to a altitudinal gradient diversidade de colêmbolos (hexapoda) de acordo com o gradiente de altitude

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ID: 144240
2009
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Abstract
The objective of this work was to elevate gradient effect on diversity of Collembola, in a temperate forest on the northeast slope of Iztaccíhuatl Volcano, Mexico. Four expeditions were organized from November 2003 to August 2004, at four altitudes (2,753, 3,015, 3,250 and 3,687 m a.s.l.). In each site, air temperature, CO2 concentration, humidity, and terrain inclination were measured. The influence of abiotic factors on faunal composition was evaluated, at the four collecting sites, with canonical correspondence analyses (CCA). A total of 24,028 specimens were obtained, representing 12 families, 44 genera and 76 species. Mesaphorura phlorae, Proisotoma ca. tenella and Parisotoma ca. notabilis were the most abundant species. The highest diversity and evenness were recorded at 3,250 m (H' = 2.85; J' = 0.73). Canonical analyses axes 1 and 2 of the CCA explained 67.4% of the variance in species composition, with CO2 and altitude best explaining axis 1, while slope and humidity were better correlated to axis 2. The results showed that CO2 is an important factor to explain Collembola species assemblage, together with slope and humidity.
O objetivo deste trabalho foi avaliar o efeito do gradiente de elevação na diversidade de Collembola, em uma floresta temperada no Vulcão Iztaccíhuatl, México. Quatro expedições foram organizadas de novembro 2003 a agosto 2004, em quatro altitudes (2.753, 3.015, 3.250 e 3.687 m). Em cada local foram medidas a temperatura, a concentração de CO2 e a umidade do ar, além da inclinação do terreno. A influência de fatores abióticos na composição da fauna foi avaliada nos quatro locais de coleta, por meio da análise de correspondência canônica. Coletaram-se 24.028 espécimes, distribuídos em 12 famílias, 44 gêneros e 76 espécies. Mesaphorura phlorae, Proisotoma ca. tenella e Parisotoma ca. notabilis foram as espécies mais abundantes. A diversidade e a equitabilidade mais elevadas foram registradas a 3.250 m (H' = 2.85; J' = 0.73). A análise canônica mostrou que os eixos de correspondências 1 e 2, juntos, explicam 67.4% da variação na composição específica, em que o CO2 e a altitude explicam melhor o eixo 1, ao passo que a inclinação e a umidade estão mais bem relacionadas ao eixo 2. Os resultados mostraram que o CO2 é um fator importante para explicar o agrupamento das espécies de Collembola, juntamente com a inclinação e a umidade.
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garca-gmez2009pesquisadiversity Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Arturo García-Gómez, Gabriela Castaño-Meneses, José G. Palacios-Vargas
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Journal proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006
Year 2009
DOI
10.1590/S0100-204X2009000800016
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800016
Keywords
co2 canonical correspondence analysis

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