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From Wikipedia

Ecosystem engineer

An ecosystem engineer is any organism that creates or modifies habitats. Jones et al. (1994) identified two different types of ecosystem engineers:

  • Allogenic engineers modify the environment by mechanically changing materials from one form to another. Beavers are archetypal ecosystem engineers; in the process of clearcutting and damming, beavers alter their ecosystem extensively. Different types and numbers of other organisms will thrive in the region of a beaver dam than would in a non-dammed region. Caterpillars that create shelters from leaves are also creating shelters for other organisms which may occupy them either simultaneously or subsequently.
  • Autogenic engineers modify the environment by modifying themselves. As trees grow, their trunks and branches create habitats for other living things. In the tropics, lianas connect trees, which allow many animals to travel exclusively through the forest canopy.

Humans are very significant allogenic engineers, though this interaction is more studied in the field of human ecology.

Introduced species are often ecosystem engineers. Kudzu, a leguminous plant introduced to the southeast U.S., changes the distribution and number of animal and bird species in the areas it invades. It also crowds out native plant species. The zebra mussel is an ecosystem engineer in North America. By providing refuge from predators, it encourages the growth of freshwater invertebrates through increasing microhabitats. Light penetration into infected lakes also improves, resulting in an increase in algae.



From Yahoo Answers

Question:Please answer it in detail. I'm not understanding the differene between aquatic biome and an aquatic ecosystem. And also the meaning of the statement "Biosphere is the single largest ecosystem." Thanks.

Answers:Biome Definition: A distinct group lifeforms and the environment in which they are found. The world's biomes can be grouped into the following types: Aquatic: The aquatic biome includes freshwater habitats (ponds, lakes, streams, wetlands) as well as marine habitats (ocean, coastal waters, estuaries, coral reefs). Desert: The desert biome includes areas where rainfall is less than 50 cm/year. Desert habitat types include hot and dry, semiarid, coastal, and cold. Forest: The forest biome includes areas that are dominated by trees and other woody vegetation. ecosysten An ecosystem is a complete community of living organisms and the nonliving materials of their surroundings. Thus, its components include plants, animals, and microorganisms; soil, rocks, and minerals; as well as surrounding water sources and the local atmosphere. The size of ecosystems varies tremendously. An ecosystem could be an entire rain forest, covering a geographical area larger than many nations, or it could be a puddle or a backyard garden. Even the body of an animal could be considered an ecosystem, since it is home to numerous microorganisms. On a much larger scale, the history of various human societies provides an instructive illustration as to the ways that ecosystems have influenced civilizations. biosphere The biosphere is simply "life on Earth" the sum total, that is, of all living things on Earth. Yet the whole is more than the sum of the parts: not only is the biosphere an integrated system whose many components fit together in complex ways, but it also works, in turn, in concert with the other major earth systems. The latter include the geosphere, hydrosphere, and atmosphere, through which circulate the chemical elements and compounds essential to life.

Question:Please do not give me scientific definitions, etc. Ive already got those xD Anyway, my science teacher makes it seem likes it's a specific place ex: "there are about 13-14 biomes in the world" ...this makes me think, like theres 7 continents, theres 13 biomes? or are there 13 different types and they're scattered everywhere? is every place a biome? also, does anyone know any examples of these? [not about humans, though] *ecosystem *biotic [an organism] *community *population *organism [other than human] *niche *producer [of food] *consumer *herbivore [other than human] *decomposer Thank You So Much<3 My Science Teacher Is Way Too Vague :/

Answers:Biomes are basically areas with similar vegetation, climate, animals, etc. Ecosystem- desert, coral reef, savanna, prairie, rainforest, tundra Biotic- fungi and algae within lichen, flowering plants and pollinators Community- a group of plants, trees, and animals within a forest Population- a number of the same organism living in an area Organism- dog, cat, bacteria Niche- plants produce oxygen, fungi decompose things Producer- grass Consumer- bear, dog, deer Herbivore- deer, cows, sheep Decomposer- fungi

Question:The title explains all. What are the 2 types of competition (which is a type of interaction in an ecosystem) in an ecosystem???

Answers:I believe its inter-specific competition and intra-specific competition. Inter-specific competition is between members of different species while intra-specific competition is between members of the same species. Hope this helps!=)

Question:Please do not give me scientific definitions, etc. Ive already got those xD Anyway, my science teacher makes it seem likes it's a specific place ex: "there are about 13-14 biomes in the world" ...this makes me think, like theres 7 continents, theres 13 biomes? or are there 13 different types and they're scattered everywhere? is every place a biome? also, does anyone know any examples of these? [not about humans, though] *ecosystem *biotic [an organism] *community *population *organism [other than human] *niche *producer [of food] *consumer *herbivore [other than human] *decomposer Thank You So Much<3 My Science Teacher Is Way Too Vague :/

Answers:13 different biomes and they're scattered everywhere. Tundra is my favorite biome. http://www.marietta.edu/~biol/biomes/images/tundra/alaskapipeline1.jpg

From Youtube

Forest Biomes and Forest Types :An overview of world forest biomes and different forest types.

0504 733 biomes and ecosystems.mov :7.3.3 explain how the biotic and abiotic factors affect the carrying capacity and sustainability of an ecosystem What is the difference between biotic and abiotic factors? What are examples of biomes, each with its characteristic temperature and precipitation, fauna and flora?