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The lion is the world's second-largest big cat and serves as an apex land predator in Africa. [1] [2] The saltwater crocodile is the largest living reptile and the dominant predator throughout its range. [3] [4] The great white shark (bottom) is one of the top marine predators; however, the orca (top) is known to prey upon them. Thus, great ...
Tropical and subtropical grasslands, savannas, and shrublands is a terrestrial biome defined by the World Wide Fund for Nature. [1] The biome is dominated by grass and/or shrubs located in semi-arid to semi- humid climate regions of subtropical and tropical latitudes .
Oak savanna with buttercups in Sams Valley, Oregon. Eastern woodlands of the United States - Woodlands in southeastern regions. Oak savanna - Savanna in west coast, western, and central regions. Native American use of fire - Other native uses of fire. Terra preta - Use of burning in South America agricultural use rather than grassland.
Joseph Connell published his hypothesis in 1970 in Dynamics of Populations. [2] Unlike Janzen, Connell proposed experiments that focused on the key prediction that exclusion of host-specific predators would cause a decrease in diversity as tree species with greater establishment or competitive ability formed low-diversity seedling and sapling communities where dominance was concentrated in a ...
A hypothesis which states that as top predators dwindle in an ecosystem, an increase in the different populations of mesopredators occurs. metabolic theory of ecology A theory that explains the relationship between an organism's body mass and metabolic rate. microbial ecology A branch of ecology that studies microorganisms. micro-climate
The African bush elephant (Loxodonta africana), also known as the African savanna elephant, is a species of elephant native to sub-Saharan Africa. It is one of three extant elephant species and, along with the African forest elephant , one of two extant species of African elephant .
Without keystone species, the ecosystem would be dramatically different or cease to exist altogether. Some keystone species, such as the wolf and lion, are also apex predators. The role that a keystone species plays in its ecosystem is analogous to the role of a keystone in an arch. While the keystone is under the least pressure of any of the ...
Fire regimes of United States plants. Savannas have regimes of a few years: blue, pink, and light green areas. When first encountered by Europeans, many ecosystems were the result of repeated fires every one to three years, resulting in the replacement of forests with grassland or savanna, or opening up the forest by removing undergrowth. [23]