Lecture6_Water budget_biomes


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Unformatted text preview: energy (light and heat). Food Chain Food Chain ► Food Chain: is the process how food is distribution to the ecosystem ► Tropic Level: each step in the food chain ► At each level food is passed from one level to the next, but most of the energy is lost. Food Chains Food Chains ► Carnivores: are meat­ eating animals, eat herbivores and in turn be eaten by other carnivores. ► Omnivores: humans ► Herbivores: are animals that consuming plants. Community Succession Community Succession ► As plants grow and multiply, they alter their environment. ► The plants of the community may change over time until a stable plant population emerges. ► This community remains until something like a fire changes the physical environment. ► The changes in the community is called Succession. Biodiversity Biodiversity ► Diversity of species ► Stability of community ► Biosphere reserves UN Biosphere Reserve Program ► Importance of size ► Managed landscapes Biomes Biomes ► Biome: is a large, stable, terrestrial ecosystem characterized by a specific ecosystems grouped by: Plant types Animal types ► Named for dominant vegetation/climate ► Typically contain many ecosystems ► Because plant distribution respond to environmental conditions and reflect variations in climate and soil, the biome­related world climate map. Major Biomes Major Biomes ► Forest Tropical rainforest Temperate rainforest Boreal ► Savannah ► Woodland ► Scrubland ► Grassland ► Desert ► Tundra Equatorial and Tropical Rain Forest Equatorial and Tropical Rain Forest ► This biome is in a climate that receives 12hr ► High insolation ► And average temperature of 77 F ► The Amazon is the largest tract of tropical rainforest. Savanna Savanna ► Large expanses of grassland interrupted by trees and shrubs ► This is a transitional biome between the tropical forest and semiarid tropical steppe and deserts. ► Savannas covered more than 40% of Earth Land surface before human intervention. ► The Savannas receive their precipitation during less than 6 months and are influenced by the ITCZ Mediterranean Shrubland Mediterranean Shrubland ► This biome occupies those regions poleward of the shifting high­pressure cells. ► Their stable high­pressure presence produces the characteristics dry summer climate. ► In exist in place in Chile, Australia and Mediteranean Vegetation and Hydrologic Cycle Vegetation and Hydrologic Cycle ► Trees and forests require large amounts of water ► Trees play key role in returning rainwater to the atmosphere Deforestation affects water balance of regions Ex. Amazon ► Grasses Shallow roots Variable transpiration rates The Carbon Cycle The Carbon Cycle ► Processes that cycle carbon and oxygen between the environment and living things Photosynthesis ► Determined by climate ► Seasonal cycles of solar radiation Respiration ► Opposite reaction of photosynthesis Combustion ► Coal, oil, natural gas ► Industrial Revolution ► Lithosphere stores carbon Carbon Trading Excersice Carbon Trading Excersice ► http://today.msnbc.msn.com/id/18288820/...
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