Collins, S.L., S.M. Glenn, and D.J. Gibson. 1995. Experimental analysis of intermediate disturbance and initial floristic composition: decoupling cause and effect. Ecology 76:486-492.
This phyto-ecological study is on halophilic and salt-resistant vegetation of Oran region. The semiarid and sometimes arid climate has been defined and confirmed from a bioclimatic point of view. The pedological approach used shows a soil with sandy to silty-sandy texture, favoring regression of the vegetation and a halophilic vegetation set up. In this study, we analyze the floristic composition of the northern region of Hammam Boughrara using multiple floristic surveys conducted at three stations along the Tafna wadi. Dominated by Mediterranean and Saharo-Sindian elements, the relatively poor flora (88 species in total) is biologically characterized by a clear dominance of therophytes (>33%) and chamaephytes (>19%) to the detriment of phanerophytes.
Initial floristic composition, ..
The core of the idea is that Monterey pine would be encouraged to persist in certain areas on the north coast rather than being removed as an exotic pest. These locations are defined as areas where Monterey pine has naturalized, overlaps its historic range under similar climates at present, and includes floristic associates found in Monterey pine fossil assemblages.
This study aims to determine the floristic characteristics of ..
The works in the region remain somewhat fragmented. We intend contribute floristic surveys that may be useful. The interpretation of the Oran halophilic populations is possible and effective in light of pre-forest formations derived from, because of the strong anthropic pressure exerted in the region. The area was also affected by drought from 1970 to 2000.
The floristic composition of all ..
Correlations between five floristic gradients at small spatial extents (10 â 20 m) and one successional gradient over a larger spatial extent (1.5 km) are analysed.
regeneration in the Cape Floristic Region of
An analysis carried out by the authors on the IUCN red list of Sri Lankan Angiosperms revealed that there are 116 species found exclusive common elements to both Sri Lanka and the Peninsular India. However, only one species, Impatiens acaulis Arn., has been recognized under endangered category for Indian Subcontinent. Disjunct geographical distribution or fragmentation of range in distribution of biological entities is recognized as one of the reasons for rarity and endangerment. Range in geographical distribution of many insular species becoming shrunken owing to isolation and are presently confined their occurrence to a few isolated fragments of their former range. According to Drury . ‘A rare species is one that occurs in widely separated small sub-populations so that, interbreeding between in the sub-populations is seriously affected or reduced or restricted to a single population’. The rediscovery of Pavetta gardneri Bremek. is quite remarkable because an extinct insular endemic element of the Sri Lankan flora currently relocated from a different distinct floristic province of the Southern Western Ghats of the Peninsular India highlight a new dimension on its degree of endemism by disjunct geographical distribution and its exigency for conservation measures.
Изображение и фото "Floristic" Bigstock
Egler FE (1954) Vegetation science concepts. I. Initial floristic composition – a factor in old‐field vegetation development. Vegetatio 4: 412–417.