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In comparison with other biomes, however, the taiga has low botanical diversity. Coniferous trees are the dominant plants of the taiga biome. Very few species, in four main genera, are found: the evergreen spruce, fir and pine, and the deciduous larch. In North America, one or two species of fir, and one or two species of spruce, are dominant.
The seeds are 4–5 mm (0.16–0.20 in) in diameter and weigh on average 68 mg. [5] The berries exude a deep red resin, known as dragon's blood. [ 6 ] Like other monocotyledons, such as palms , the dragon's blood tree grows from the tip of the stem, with the long, stiff leaves borne in dense rosettes at the end.
[9] [10] Jungles may exist within, or at the borders of, tropical forests in areas where the woodland has been opened through natural disturbance such as hurricanes, or through human activity such as logging. [6] [11] [12] The successional vegetation that springs up following such disturbance, is dense and tangled and is a "typical" jungle ...
During this stage, the roots are established, and the bud of the tree is protected from fire. Years later, the longleaf will reach about 6–10 feet (1.8–3.0 m) in height and the diameter will increase with time. Somewhere around 30 years after the trees will begin to produce cones with fertile seeds and average about 110 feet (34 m) at maturity.
Setaria pumila, a species of Poaceae (the dominant plant family in grasslands) A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents ...
A grass savanna at Kruger National Park in South Africa. A savanna or savannah is a mixed woodland - grassland (i.e. grassy woodland) biome and ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous ...
Montane ecosystems. A subalpine lake in the Cascade Range, Washington, United States. Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial factor in shaping ...
The Canadian boreal forest is a very large bio-region that extends in length from the Yukon-Alaska border right across the country to Newfoundland and Labrador. It is over 1,000 kilometres (620 mi) in width (north to south) separating the arctic tundra region from the various landscapes of southern Canada. The taiga growth (as defined in North ...