As a tropical country with three main agricultural zones (the forest vegetation zone
and the coastal and northern savannah zones), producing a wide variety of crops and able to sustain a range of livestock, Ghana is well-positioned to become a leading agricultural producer.
The class Quercetea pubescentis includes deciduous forest formations in upper Mediterranean vegetation zone
. The order Querco cerridis-Carpinetalia orientalis is characterized by Carpinus orientalis Mill.
The Tropical Lowland Peat Swamp Forests in Sarawak, Malaysia and adjacent Brunei show lateral or horizontal changes in vegetation types from its periphery to the centre of the dome-shaped peat swamps and each of the six dominant lateral vegetation zone
was designated "Phasic Community" by Anderson (1961).
Increases of the wave period and wave length resulted in a higher reduction of wave height as wave travelled along the vegetation zone
, even though the difference observed between the tested wave periods was not very substantial for both the regular (W1E90 and W2E90) and irregular (W4E90 and W5E90).
Laboratory studies on fully developed flows with submerged vegetation have demonstrated reduced velocities within the vegetation zone
To evaluate annual trends in the phenological variables, these variables were analyzed at the vegetation zone
The open Clusia shrubland (OCS) was the vegetation zone
with the highest species richness (S = 5), the highest total bromeliad abundance (6360 rosettes), the highest estimated density (12000 [rosettes.ha.sup.-1]) and the highest estimated bromeliad biomass (8573 kg.[ha.sup.-1]), whereas the anthropic zone (AZ) had the lowest values for the above parameters (Table 2).
A first group of ecologically and morphologically similar morpho-species occur at higher altitudes on the islands in the pampa vegetation zone
and are hereafter referred to as "high elevation species." Based on differences in morphology of the genital organs, different species can be distinguished: Hogna species 1 (H1), living on both southern volcanoes Cerro Azul and Sierra Negra of Isabela, one of the youngest islands, Hogna species 4 (H4) which occurs on islands of intermediate age (Santa Cruz, Santiago, and Volcan Alcedo of Isabela), and Hogna species 2 (H2) which occurs on the oldest island of San Cristobal.
Five plots were established in the buffer (figure 1), where soil samples were collected by vegetation zone
in May 2001 and July 2005.
Two of the mainland lakes, Allikajarv and Lepaauk, are most similar to small lakes of glacial origin, with a developed littoral vegetation zone
well distinguished from the central deeper, profundal-like hollow.
This zone has a different arboreal structure than the secondary vegetation zone
because the trees are planted in rows, and the spaces between the rows are manually weeded, creating spaces where light enters.
HCSNA lies within the Edwards Plateau vegetation zone
(Gould 1975) and the Balconian biotic province (Blair 1950).