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| González-Paleo,Luciana; Pastor-Pastor,Alejandro; Bar Lamas,Marlene; Vilela,Alejandra; Ravetta,Damián. |
| Seedling recruitment is a critical stage of a plant's cycle which determines population viability, the potential for invasiveness of a plant species and the success of establishment of a crop, among other processes. We evaluated the most relevant stages leading to recruitment (seed-rain, the time of seedling emergence, and seedling survival) in four species of Physaria (P. gracilis, P. angustifolia, Physaria pinetorum and P. mendocina) in a field experiment in Patagonia, Argentina, to assess the possibility of using spontaneous recruitment to understand population dynamics and to evaluate the potential of this process as a tool for crop reestablishment. We determined the effect of water availability and initial seedling density on final stand density. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lesquerella; Arid environments; Seed-rain; Seedling survival; Seedling density; Water availability. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2016000300012 |
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| Ferreira,Bruno Henrique dos Santos; Souza,Camila Silveira; Fachardo,André Luiz Silva; Gomes,Aline Conceição; Sigrist,Maria Rosângela. |
| ABSTRACT Cleistocactus baumannii is the only ornithophilous cactus species in the Brazilian Chaco. In addition, this species of Cactaceae invests heavily in flowering in the ecoregion. Such characteristics motivated us to evaluate the temporal availability of flowers in the context of its floral visitors. The reproductive system of C. baumannii, the number of individuals in flowering, flower abundance and the frequency and richness of floral visitors were evaluated and quantified. Nectar robbery was a frequent phenomenon in the studied population; therefore, we compared the pollen load deposited on the stigma of damaged (robbery) and undamaged flowers. In the Brazilian Chaco, C. baumannii is self-incompatible and has a continuous flowering pattern,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arid environments; Chlorostilbon lucidus; Floral damage; Nectar robbery; Ornitophily; Xylocopa splendidula. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100167 |
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| Penido,Gabriel; Astete,Samuel; Furtado,Mariana Malzoni; Jácomo,Anah Tereza de Almeida; Sollmann,Rahel; Torres,Natalia; Silveira,Leandro; Marinho Filho,Jader. |
| Abstract Ocelots play a key role in ecological communities as mesopredators affecting the lower trophic level and other mesopredators. They show great variability in ecological traits across their distribution, but knowledge of this species is missing in several regions where it occurs. Here, we present the first study of ocelot in the Brazilian semiarid of Caatinga. Arid habitats might keep carnivore population density low and therefore vulnerable to environmental shocks and to human-induced changes, at risk of local extinction. To assess their population status, we used camera traps between September 2009 and January 2010. We estimated the density of ocelots using a spatially explicit capture-recapture method (SECR) to be 3.16 ± 0.46 individuals per 100... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Arid environments; Brazil; Density; Ocelot; SECR. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000400503 |
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