|
|
|
|
|
| CAMPOS,CLAUDIA M; CAMPOS,VALERIA E; MONGEAUD,ARNALDO; BORGHI,CARLOS E; DE LOS RÍOS,CLAUDIA; GIANNONI,STELLA M. |
| The fate of Prosopis flexuosa seeds dispersed by cattle is dependant on the spatial pattern of dung deposition and foraging movements. We hypothesised that cattle-use site classes explain the response variables related to seed input and fate of seeds, seedlings and saplings (small plants more than one year old). We defined sites with heavy cattle traffic ("trails" and "periphery of trails"), sites used for resting and foraging ("under Prosopis"), and sites where isolated individuals only walk ("under shrubs" and "bare soil"). Considering the established cattle-use site classes, our specific goals were to quantify and compare: (1) seeds transported in cattle dung; (2) seedlings 10 months after dung deposition; (3) established saplings; and (4) germinated... |
| Tipo: Journal article |
Palavras-chave: Dung deposition; Endozoochory; Establishment; Germination; Seed input. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200013 |
| |
|
|
| CAMPOS,VALERIA E; ANDINO,NATALIA; CAPPA,FLAVIO M; REUS,MARÍA L; GIANNONI,STELLA M. |
| The viscacha rat (Octomys mimax; Rodentia, Octodontidae) belongs to a monotypic genus endemic to western Argentina and inhabits lowland deserts with abundant rocks and ravines. Our objectives were 1) to determine the attributes of crevices (depth, height, width, entrance orientation, and rock color) that influence selection by the viscacha rat; 2) to compare the range and variance of temperature inside and outside crevices, at the soil surface, at the rock surface and in the air; and 3) to evaluate if there is a thermal gradient inside crevices, comparing range and variance of temperature at the soil surface at different depths (0, 30 and 50 cm). The viscacha rat did not use microhabitats in proportion to availability; the species selected deep and narrow... |
| Tipo: Journal article |
Palavras-chave: Desert; Rock dwelling mammal; Suitable habitat; Viscacha rat. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000300008 |
| |
|
|
|
