Ecosystems Essay

365 Words2 Pages
Chapter 1 Ecosystems I. Earth’s Biomes A. Biome: a major ecological community type characterized by a similar climate, soil, plants, and animals. 1. Biomes include bother terrestrial and aquatic communities. a) Terrestrial: Land based b) Aquatic: In water 2. Biomes display huge differences in the number or diversity of species present and how these species interact with one another. 3. Earth is divided into distinct climate zones that are created by global circulation patterns. a) Tropics are the warmest, wettest regions on the globe, while subtropical high – pressure zones create dry zones at about 30 degrees latitude north and south. b) Temperatures and precipitation are lowest at the poles 1) These conditions create biomes a) Each biome contains many ecosystems made up of organisms adapted for life in their specific settings. 1) Ecosystems: smaller communities 4. Earth’s major biomes result primarily from differences in climate a) Each biome contains many ecosystems made up of species adapted for life in their specific biome B. Land Biomes: Typically names for their characteristic types of vegetation, which in turn influences what kinds of animals, will live there. 1. Soil characteristics also vary from one biome to another, depending on local climate and geology C. Aquatic Biomes: (Marine and freshwater) cover three quarters of the earth’s surface and include rivers, lakes, coral reefs, estuaries, and open ocean. 1. Oceans account for almost all of this area. 2. Which include large bodies of water (oceans and lakes) are stratified into layers: surface waters are warmest and contain most of the available light, but depend on mixing to bring up nutrients from deeper levels. 3. The distribution of temperature, light, and nutrients set broad conditions for life in aquatic biomes in much of the same way that climate and soils do for land. D.
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