|
|
|
| Registros recuperados: 19 | |
|
| |
|
|
| CERQUEIRA,R.; FREITAS,S. R.. |
| The variables in habitat studies are usually transformed in such a way that they become abstractions and intuition is lost. We tested a new method for the analysis of habitat using data collected in a grid laid at the "restinga de Maricá", in Rio de Janeiro State, Brazil. Thirty-seven microhabitat variables were measured at each trap station. We assume that these variables characterize the microhabitat structure at the moment when measurements were taken. The data are transformed in 3 ways: (1) the averages of the measured variables were calculated, as usual in habitat studies; (2) the data are transformed in densities per area in square meters without reduction in the number of variables; and (3) we calculated the natural logarithms of the data thus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Discriminant analysis; Methods; Niche; Neotropics; Small mammals. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200006 |
| |
|
| |
|
| |
|
|
| KELT,DOUGLAS A.. |
| Four recent studies on Chilean vertebrates underscore the very different effects that habitat fragmentation may have under different conditions. In southern Chile, birds exhibited significant species-area relationships, whereas the more depauperate small mammal community did not. The avifauna of highly isolated rainforest remnants in Fray Jorge National Park (IV Región) presented steeper species-area relations than those in southern Chile, reminiscent of land-bridge islands after faunal relaxation. The small mammal results were unexpected but may reflect the reduced vagility and immigration potential of this group. Additionally, the inter-remnant matrix habitat may support large populations of only some species, allowing them to capitalize on resources... |
| Tipo: Journal article |
Palavras-chave: Habitat fragmentation; Valdivian temperate rainforest; Small mammals; Birds; Conservation. |
| Ano: 2001 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000400005 |
| |
|
| |
|
| |
|
|
| Yahnke,Christopher J.. |
| I conducted a small mammal trapping study in the central Paraguayan Chaco region of South America to investigate habitat selection by small mammals at different spatial scales. Small mammals were collected in forest, successional thorn scrub, pasture, and crop fields representing both relatively undisturbed habitats and agroecosystems. A total of 1089 small mammals representing 13 species were captured during 23 296 trap nights. Pastures had the highest species richness as well as the highest number of captures. Some small mammal species such as Calomys laucha and Akodon toba were captured in a variety of habitats whereas others like Holochilus chacarius and Bolomys lasiurus were captured almost exclusively in pastures. Principal components analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chaco; Habitat selection; Natural history; Paraguay; Small mammals. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832006000100008 |
| |
|
|
| Shepherd,John D.; Ditgen,Rebecca S.. |
| Small mammals were sampled in five closed, humid, Araucaria araucana forests that differed in the degree of anthropogenic disturbance in southwestern Neuquén province. Nine species were captured in 3416 trap nights. Abrothrix longipilis and Oligoryzomys longicaudatus made up 88% of all captures. Small mammal relative abundance was 52 times higher where grazing was absent compared to a site with intense grazing pressure. Seed predation, primarily by livestock and feral exotic mammals, varied from 59.7% to 15.1% of marked seeds per day. Small mammal community productivity and composition were correlated with understory structure (Mantel test, r = 0.529, p = 0.04), and with rates of seed predation (r = -0.91, n = 4, p = 0.08). Forests with less complex... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Araucaria araucana; Exotic species; Human impact; Seed predation; Small mammals. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832005000200008 |
| |
|
|
| Ribeiro-Júnior,Marco A; Rossi,Rogério V; Miranda,Cleuton L; Ávila-Pires,Teresa C. S. |
| One of the most commonly used sampling techniques to capture leaf litter amphibians, lizards and small mammals is a set of pitfall traps with drift fences. However, there are still many speculations concerning the effectiveness of different designs of pitfall traps and the most adequate size of each trap. To address this problem, we conducted the first standardized comparison of patterns of species richness, rank-abundance, and community structure of leaf litter amphibians, lizards and small mammals for two trap designs (I and Y format) and three bucket sizes (35, 62, and 100 L) in a Neotropical forest. Results are very similar for the herpetofauna, regardless of the pitfall trap design or size used, while for small mammals values of species richness were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Faunal survey; Neotropical forest; Reptiles; Sampling method; Small mammals. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000100012 |
| |
|
|
| Barros-Battesti,Darci Moraes; Martins,Rosana; Bertim,Carlos Roberto; Yoshinari,Natalino Hajime; Bonoldi,Virginia L.N.; Leon,Elaine P.; Miretzki,Michel; Schumaker,Teresinha T.S.. |
| The Atlantic Forest small mammal land fauna, except bats, and the abiotic factors that might have an influence on its composition, were studied in the Itapevi County, State of Sao Paulo, a forested region, partly altered by antropic action, from January, 1995 to June, 1996. The trapping effort consisted of 2,888 trap-nights, resulting in a 4.6% trapping success and consisted of monthly trappings, for five consecutive days. During this period, 134 specimens were captured, of which 46.3% were Didelphimorphia and 53.7% were Rodentia. Eleven species were registered: two Didelphimorphia: Didelphis marsupialis (Linnaeus, 1758) and Marmosops incanus (Lund, 1841), and nine Rodentia: Akodon cursor (Winge, 1887), Bolomys lasiurus (Lund, 1841), Oxymycterus hispidus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Small mammals; Marsupial; Rodent; Atlantic Forest. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000100021 |
| |
|
|
| GUTIÉRREZ,JULIO R; MESERVE,PETER L; KELT,DOUGLAS A; ENGILIS JR,ANDREW; PREVITALI,M. ANDREA; MILSTEAD,W. BRYAN; JAKSIC,FABIAN M. |
| Since 1989, we have conducted a large-scale ecological experiment in semiarid thorn scrub of a national park in north-central Chile. Initially, we focused on the role of biotic interactions including predation, interspecific competition, and herbivory in small mammal and plant components of the community. We utilized a reductionist approach with replicated 0.56 ha fenced grids that selectively excluded vertebrate predators and/or larger small mammal herbivores such as the degu, Octodon degus. Although we detected small transitory effects of predator exclusions on degu survival and numbers, other species failed to show responses. Similarly, interspecific competition (i.e., degus with other small mammals) had no detectable numerical effects (although some... |
| Tipo: Journal article |
Palavras-chave: Birds; Chilean desert; Ephemeral plants; LTER; Small mammals. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000100005 |
| |
|
| |
|
| |
|
| |
|
|
| Bruijn, H. de; Mayda, S.; Hoek Ostende, L.W. van den; Kaya, T.; Saraç, G.. |
| The assemblage of small mammals from Sabuncubeli is of special interest because: 1) it is the first from the Early Miocene of Anatolia that occurs associated with a set of large mammal remains, 2) it is only the second from Anatolia representing MN3, 3) it has a composition that is essentially different from the one from Keseköy, the other MN3 assemblage from Anatolia. Some of the genera and species that are common in Keseköy are either very rare or absent in Sabuncubeli: i.e. the insectivores Galerix uenayae and Theratiskos and the rodents Debruijnia, Vallaris, Sayimys and Enginia. Others, such as Schizogalerix evae, Steneofiber eseri, Palaeosciurus fissurae and Eumyarion orhani occur in Sabuncubeli, but not in Keseköy. The new species Schizogalerix evae... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Early Miocene; Schizogalerix evae n. sp.; Eumyarion orhani n. sp.; Small mammals; Sabuncubeli; Anatolia; Turkey; 38.22; 42.84. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/327716 |
| |
|
| |
|
|
| Taig-Johnston,Megan; Strom,Madeline K.; Calhoun,Kendall; Nowak,Kendra; Ebensperger,Luis A.; Hayes,Loren. |
| Abstract This review covers long-term ecological studies in Central America, South America, and Antarctica that include at least 10 years of data on both terrestrial and marine mammals as well as birds. Specifically, we compiled long-term research on social systems, population ecology, and community ecology. Long-term research is necessary to understand decadal trends and dynamics that would otherwise go unnoticed in short-term studies. This review highlights the impact of ecological conditions as well as territoriality and conflict on social organization and structure, the role that environmental perturbations and climate change have on populations, and how interaction between biotic and abiotic factors influence entire ecological communities. It... |
| Tipo: Journal article |
Palavras-chave: Long-term studies; Social systems; Population ecology studies; Community ecology studies; ENSO; Small mammals. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2017000100501 |
| |
|
| |
| Registros recuperados: 19 | |
|
|
|
