|
|
|
|
|
| García-Gómez,Arturo; Castaño-Meneses,Gabriela; Palacios-Vargas,José G.. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Collembola; Canonical correspondence analysis; CO2; Mesofauna communities; Spatial variation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800016 |
| |
|
| |
|
| |
|
| |
|
|
| Gianotti,André Rodrigues da Cunha; Souza,Maria José Hatem de; Pereira,Israel Marinho; Machado,Evandro Luiz Mendonça; Vieira,Artur Duarte; Magalhães,Mariana Rodrigues. |
| Lychnophora pohlii Sch. Bip. (Asteraceae), known as "Arnica mineira", is widely used in folk medicine and very abundant in the altitude vegetation of rocky grassland. The aim of this work was to study the density of this species and its relationship with soil parameters in rocky grassland in Diamantina, in the Upper Jequitinhonha region, Minas Gerais. Ten contiguous 20 x 50 m plots were marked (total sampled area 10,000 m²) on the campus Juscelino Kubitschek of the Federal University of Jequitinhonha and Mucuri Valleys (UFVJM). The plants in these plots were evaluated for frequency, dominance and density. The relationship between the density of this species with nine soil physical and chemical properties was analyzed by means of canonical correspondence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rocky grassland; Savanna; Forest soils; Canonical correspondence analysis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300002 |
| |
|
|
| Lecchini, D; Adjeroud, M; Pratchett, Ms; Cadoret, L; Galzin, R. |
| Coral reef fishes often exhibit a high degree of structure in their distribution and abundance, but the factors that influence their spatial arrangement are poorly understood. This study sought to explain the spatial structure of coral reef fish communities in the Ryukyu Archipelago. southern Japan. Visual surveys of coral reef fishes were conducted at multiple stations across the fringing reef (from the inner reef flat to the outer slope) at each of three different islands; Aka, Ishigaki and Sesoko. Spatial variation in fish communities (within and among reefs) was then compared to changes in environmental variables (water depth, distance from the shoreline, reef zone, coral abundance and coral richness). Despite being small islands, the total species... |
| Tipo: Text |
Palavras-chave: Analyse des correspondances canoniques; Répartition spatiale; Pomacentridae; Zonation; Canonical correspondence analysis; Distribution; Pomacentridae; Zonation. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43246/42977.pdf |
| |
|
|
|
