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Unformatted text preview: A. Seasonality of rainfall. Dashed line in slide. If rainfall is seasonal, get more woody vegetation; otherwise get grassland. B. Soil type: rocky soils don’t hold water that well – this gives vegetation that would otherwise grow in areas with less precipitation. V. We can look at the productivity and biomass of biome types: Biome type Net Primary Productivity Plant Biomass (% world) g/m 2-yr (% world) Tropical rainforest 22 % 1000-3500 42% Tropical seasonal 7 14 (= deciduous) forest Tropical savanna 8 3 All terrestrial, 60% 99.8% fresh water All marine (mostly 40% 0.2% * open ocean) Open ocean 2-400 Yet marine has 70% of Earth’s surface *Class: remember the inverted biomass pyramid in the ocean (Topic 16), not much phytoplankton biomass....
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- Fall '08
- Plankton, biome types, biome type