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| Tuffi Santos,L.D.; Cardoso Filho,O.; Santos Júnior,A.; Sant'Anna-Santos,B.F.; Felix,R.C.; Leite,F.P.. |
| The objective of this work was to analyze the floristic variation and phytosociological structure of weeds as influenced by relief and time of year in eucalyptus plantations in Santana do Paraíso and Guanhães - MG. The total area sampled for each locality was approximately 10 ± 3 hectares, comprising three types of relief: lowland, slope, and upper area. In each type of relief, 10 plots of 1 m² were sampled, corresponding to 30 plots per locality, where they were randomly allocated in a zigzag. The taxonomic identification was performed in four assessments, corresponding to the months of November and March, comprising two ratings each season, always at the same points, and geo-referenced using the Global Positioning System (GPS). A total of 3,893... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Dynamics; Phytosociology; Ecological adaptation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300001 |
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| Marx,Michael Thomas; Wild,Anna-Katharina; Knollmann,Ulrich; Kamp,Günter; Wegener,Gerhard; Eisenbeis,Gerhard. |
| Standard ecological methods (pitfall traps, trunk eclectors and soil cores) were used to evaluate collembolan community responses to different flooding intensities. Three sites of a floodplain habitat near Mainz, Germany, with different flooding regimes were investigated. The structures of collembolan communities are markedly different depending on flooding intensity. Sites more affected by flooding are dominated by hygrophilic and hygrotolerant species, whereas the hardwood floodplain is dominated by mesophilic species. The survival strategies of the hygrophilic and hygrotolerant species include egg diapause and passive drifting. The physiological adaptations to hypoxic conditions of several collembolan species were analyzed using a microcalorimeter. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavioral adaptation; Ecological adaptation; Egg diapause; Inundation; Morphological adaptation; Physiological adaptation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800032 |
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| Toledo,Marcelo Arruda de; Ribeiro,Pedro Leite; Carrossoni,Priscilla Shiota Fedichina; Tomotani,João Vitor; Hoffman,Ashley Nicole; Klebaner,Daniella; Watel,Halee Rachel; Iannini,Carlos Arturo Navas; Helene,André Frazão. |
| ABSTRACT: Task partitioning in eusocial animals is most likely an evolutionary adaptation that optimizes the efficiency of the colony to grow and reproduce. It was investigated indirect task partitioning in two castes sizes; this involves task partitioning in which the material transported is not transferred directly from one individual to another, but where it is dropped by one ant to be picked up by another. In two separate approaches, it was confirmed previous results pertaining to leaf caching activities among Atta colombica with task partitioning activities involving leaf dropping among Atta sexdens rubropilosa , in which there is a correlation between the size of an individual ant and the leaf fragment it transports. It was also suggested that this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atta; Ant behavior; Leaf cutting; Ecological adaptation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001101902 |
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