A Hot Tropical Grassland With Scattered Trees Is Savanna

A Hot T Tropical Grassland With Scattered Trees Is Asavannatundrabor

A hot T, tropical grassland with scattered trees is a: Savanna Tundra Boreal forest Desert Permafrost is a defining characteristic of which biome?: Steppe Desert Taiga Tundra The dominant plant type in the temperate forest is: Forbs Coniferous trees Deciduous trees Succulents The chaparral biome can be found in: California Australia All answers are correct The Mediterranean Trees in the Boreal forest are adapted to conserve: Carbon Phosphorus Nitrogen Magnesium What is an endemic species? A species native to only one area A species dying from an unknown disease A robust group of organisms that dominate an ecosystem A broad group of pollinating insects Which of the following is a driver of species creation? Climatic stability All answers are drivers Temporal stability Habitat heterogeneity Pollinator ecosystem services are provided by which organism? Birds All are pollinators Bees Bat Why have scientists, farmers and politicians stored the world’s seed heritage on a remote island in the Arctic? Consistent temperatures and humidity for seed survival. If the facility’s climate control fails, the seeds will only freeze. All of these answers are correct. Polar bears and remoteness are great deterrents for terrorists. Scientists consider which of the following an important aspect of “biodiversityâ€? Ecosystems Genes Species All are important What percentage of the timber imported by the United States is potentially illegally harvested? 75% 50% 1% 10% What is the present day extinction rate? About 10 times faster than the background rate About 100 times faster than the background rate About equal to the background rate About 1000 times faster than the background rate What percentage of river lengths in the United States have been modified through damming and bank modification? 50% 20% 90% 10% Which of the following statements is TRUE about extinction? Extinction occurs when speciation rates increase dramatically The only large extinction event was 65 million years ago when the dinosaurs were killed. Extinction of more than half of the existing species on the planet has occurred roughly five times Plants, but not animals, have been known to recover from extinction Which of the following threats has had a large impact on biodiversity? Overharvesting All three are correct Exotic species Habitat loss When an invasive species is introduced, what is the potential consequence of that introduction? Increased predation on some native species All of the listed consequences can occur Extinction of economically important species Reduced predation on some native species The relationship between the populations of wild lynx and snowshoe hare is an example of what ecological interaction? Birth rates dynamics Nutrient cycling Territorial dominance Predator-prey interactions Energy is _________ as you move up the trophic levels. Lost Gained Created Conserved Where one species benefits from prolonged interaction with another species, while the other species neither benefits nor is harmed is called: Parasitism Commensalism Mutualism Advantagism

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Biomes are large ecological areas characterized by specific vegetation, climate, and animal life. Among these, the tropical grassland with scattered trees is known as the savanna. The term "savanna" describes a biome that features a mixture of grasses and isolated trees, typically found in regions with seasonal rainfall and warm temperatures year-round (Hungerford, 2010). This biome supports diverse flora and fauna and plays a significant role in the Earth's ecological balance.

Permafrost, the permanently frozen ground, is a defining characteristic of the tundra biome. The tundra's cold climate results in a short growing season, and the thawing of permafrost due to climate change has implications for global carbon cycles (ACIA, 2004). In contrast, the boreal forest, or taiga, is typified by coniferous trees such as pines, spruces, and firs, which are adapted to survive the cold winters and nutrient-poor soils (Lynch et al., 2008).

The dominant plant type in temperate forests varies but is primarily deciduous trees, which shed leaves seasonally to conserve water and energy during winter months. Examples include oak, maple, and beech trees. The chaparral biome, found in regions such as California, Australia, and the Mediterranean, is characterized by shrubland and hardy, drought-resistant plants adapted to hot, dry summers and mild, wet winters (Keeley, 2012).

Endemic species are those native to only one specific geographic area, and they are often vulnerable to extinction because of their limited distribution. This concept underscores the importance of conserving habitats that harbor unique species (Raxworthy et al., 2008). Drivers of species creation include habitat heterogeneity and climatic stability, which foster speciation over evolutionary timescales (Mayr, 2001).

Pollinator ecosystem services are predominantly provided by bees, which facilitate fertilization by transferring pollen between flowering plants, supporting biodiversity and crop production. Other pollinators include birds and bats, each contributing to ecosystem functioning (Klein et al., 2007).

To safeguard global genetic diversity, scientists, farmers, and policymakers store seed heritage in arctic seed vaults, such as the Svalbard Global Seed Vault. This facility maintains seeds under controlled conditions; even if climate controls fail, the seeds remain preserved via freezing. The vault's remote location and stable climate make it an ideal backup for worldwide crop diversity (Ciol was et al., 2015).

Understanding biodiversity involves considering ecosystems, genes, and species. Each aspect is vital for Earth's resilience and adaptability. Biodiversity hotspots, such as tropical rainforests and coral reefs, are crucial regions hosting a rich variety of life forms, many of which are endemic (Myers et al., 2000).

The percentage of illegally harvested timber imported into the United States is estimated at around 50%, highlighting the challenge of regulating global timber trade and combating illegal logging (Nellemann et al., 2013). Currently, the rapid extinction rate is approximately 10 times faster than the natural background rate, driven largely by human activities such as habitat destruction, pollution, and overharvesting (Ceballos et al., 2015).

Furthermore, approximately 50% of U.S. river length has been modified through damming and bank modification, affecting aquatic ecosystems and biodiversity. Dams alter water flow, impede migration, and change sediment deposition patterns, consequently impacting native species (Richter et al., 1997).

Extinction, the irreversible loss of species, has occurred numerous times in Earth's history, most notably during mass extinction events such as the Cretaceous-Paleogene extinction that wiped out the dinosaurs. Most species that have ever existed are now extinct, emphasizing the importance of conservation efforts to prevent current or future extinctions (Raup, 1991).

Threats to biodiversity include overharvesting of resources, introduction of exotic species, and habitat loss due to urbanization and agriculture. Invasive species can outcompete native species, leading to declines or extinctions, as exemplified by the introduction of zebra mussels in North American water bodies (Pimentel et al., 2005).

The ecological interaction between predators, such as lynx and snowshoe hares, exemplifies predator-prey dynamics. These populations show cyclic fluctuations influenced by predation pressure and food availability, demonstrating a classic example of ecological balance (Krebs et al., 1995).

Energy transfer within food chains is inefficient: only about 10% of energy is gained from one trophic level to the next, with most lost as heat. This concept explains why trophic levels do not support large numbers of top predators (Lindeman, 1942).

Symbiotic relationships are critical for ecosystem stability. Particularly, mutualism, where both species benefit, is common. An example is pollination, where bees and flowering plants mutually benefit; bees obtain nectar while aiding plant reproduction. Other interactions include parasitism and commensalism (Begon, Townsend & Harper, 2005).

References

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