|
|
|
|
|
| Dossa, A. N.; Da-allada, C. Y.; Herbert, G; Bourles, Bernard. |
| The region located in the far northeast of the Gulf of Guinea (NEGG), eastern tropical Atlantic, remains poorly documented due to a lack of available in situ ocean data. Heavy rainfall and intense river discharges observed in this region induce a strong salinity stratification that may have a significant impact on the mixed layer depth and on sea surface temperatures, through the so-called barrier-layer effect. By using recent in situ data and climatological outputs from a numerical simulation, we reveal the existence of a barrier layer in the NEGG and describe its seasonal occurrence. In the NEGG, the barrier layer limits the mixed layer depth. From January to March, significant values for the barrier-layer thickness are observed mostly due to the... |
| Tipo: Text |
Palavras-chave: Mixed layer depth; Niger River discharge; Numerical model; Oceanography; Sea surface salinity; Tropical Atlantic; Vertical stratification. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00509/62103/66273.pdf |
| |
|
| |
|
|
| Gottsberger,Gerhard; Silberbauer-Gottsberger,Ilse. |
| ABSTRACT A comprehensive census of a hectare of cerrado s.s. in southeastern Brazil, a small-tree and scrub woodland physiognomy, allowed the evaluation of whether pollination and dispersal modes are correlated with the stratification of the vegetation and if so, in what way. Generalist pollination, and pollination by small bees, as well as ornithophily and anemophily were more frequent in the lower layers (ground and scrub), while species pollinated by large bees and beetles are more or less equally distributed among the ground, scrub and tree layers. The three nocturnal pollination modes, phalenophily, sphingophily, and chiropterophily indicated a preference for the upper layers (tree and scrub). Zoochory predominated in the tree layer, but autochory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado s.s. woodland; Dispersal systems; Neotropical forests; Pollination modes; Vertical stratification. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300434 |
| |
|
|
|
