Learn how energy gets into our food by watching this

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Learn how energy gets into our food by watching this short presentation:Ecological Niche
Ecological nichedescribes how an organism or population responds to the distribution of resources and competitors in an environment. An ecological niche includes all the resources available to a species along with the living and nonliving conditions that may have a favorable or unfavorable impact. Put another way, an ecological niche refers to all the possible interactions of a species with other species in a community. Interactions include the following:Competition: This occurs when two or more species compete for the same resources.Predation: Predators are at the top of the food chain in an ecosystem. Their survival depends on the availability of prey populations. Big fish eat smaller fish, and so on. Trophic interactionis a term used to describe feeding behaviors in an ecosystem.Parasitism: Parasites are organisms that live on other organisms. Many species are subject to parasites. For example, the Anophelesmosquito feeds on the blood of both animals and humans. These mosquitos can spread disease-bearing pathogens like those that cause malaria.Mutualism: This describes a mutually beneficial relationship between unrelated species. Pollination of flowering plants (angiosperms) offers a prime example. Bees collect pollen as a source of nutrients. Asthey move from flower to flower, they spread pollen to other angiosperms. This enables the reproduction (pollination) of flowering plants. Thus, bees and angiosperms have a mutual relationship.All of the above are important, along with abiotic factors such as climate and soil type. Informally, a niche is thought of as the “role” played by a species within a community or habitat.BiomesA biomeis different from an ecosystem. An ecosystem describes the interaction of living and nonliving things inan environment. A biome, on the other hand, is a specific geographic area that can be identified by the species living there. A biome is made up of many ecosystems. For example, the aquatic biome includes a number of ecosystems. These include ecosystems associated with phytoplankton, coral reefs, kelp forests, fish, and so on.The five major biomes of planet Earth include desert, tundra, aquatic, forest, and grassland biomes.Desert BiomesDesert biomescover about one-fifth of Earth’s land surface. Deserts form due to the low level of rainfall in an area. A primary characteristic of all deserts is low species diversity, including reptiles and small mammals like field mice and gophers.Four major types of deserts exist in this biome: hot and dry, semiarid, coastal, and cold. Hot and dry desertsinclude the Sahara, the Arabian Peninsula, central Australia, and the Mojave Desert in the American Southwest. Semiarid desertscan be found in areas of Utah, Montana, and the Great Basin. Coastal desertsinclude the far northwestern Sahara where it borders the Atlantic Ocean, and the Atacama Desert of Chile, which borders the Pacific Ocean. Cold desertsare found in places like

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