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Bergmann's rule - Penguins on the Earth (mass m, height h) [1] Bergmann's rule is an ecogeographical rule that states that, within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, while populations and species of smaller size are found in warmer regions.
Many different plant species live in the high-altitude environment. These include perennial grasses, sedges, forbs, cushion plants, mosses, and lichens. [81] High-altitude plants must adapt to the harsh conditions of their environment, which include low temperatures, dryness, ultraviolet radiation, and a short growing season.
Vegetation shifts from non-poisonous to poisonous plants seem to correlate with increased land degradation. Plants defined as poisonous in the alpine grasslands area include species such as locoweed, [2] which is known to be very invasive. Not only are poisonous plants an indicator of decline, they result in increased mortality of grazing animals.
The African bush elephant (foreground), Earth's largest extant land animal, and the Masai ostrich (background), one of Earth's largest extant birds. In zoology, megafauna (from Greek μέγας megas "large" and Neo-Latin fauna "animal life") are large animals. The precise definition of the term varies widely, though a common threshold is ...
Numerous animals have coevolved with plants; flowering plants have evolved pollination syndromes, suites of flower traits that favour their reproduction. Many, including insect and bird partners , are pollinators , visiting flowers and accidentally transferring pollen in exchange for food in the form of pollen or nectar .
Studies have shown that tall people have an edge in a number of personal and professional situations, but there are many health benefits short people get. 5 reasons why it's better to be short ...
A study published on eLIFE says, "People from different countries grow to different heights. This may be partly due to genetic, but most differences in height between countries have other causes."
A tree savanna at Tarangire National Park in Tanzania in East Africa 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.