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Warm-up: (10-6-15)
*Ch.4,7 CW/Ch.3 CG and rubric out for stamp!
*Late Ishmael Q’s in the HW tray!
• 1. Which biome has shallow soil/less humus and why?
• 2. Which biome has deep fertile soil?
• 3. List 2 ways desert plants have adapted to a dry climate.
• 4. Which biome has the least amount of precipitation? (be specific)
Ch.7-3: Tropical Rainforests
Mrs. Boyd
• Goals for today:
– Identify the characteristics of a rainforest such as soil type, organisms, and layers
– Describe examples of interdependence
• Why does what’s happening in the rainforest matter to us here?
• Biodiversity
• Interdependence
• Biodiversity includes
– Diversity in _____
– Diversity of _____
– Diversity of _____ in a population
• Genetic variation plays an important role in natural selection and the survival of a species
• And Interdependence
• Tropical Rain Forest
• High diversity of species.
– Found near the equator.
• Primary limiting factor is soil nutrients!
• Soil is acidic and low in nutrients
• Rapid decomposition so very few nutrients are left to go into the ground.
• Most nutrients are stored in the….
• Trees:
– Shallow roots
– Buttress- wide base
– Broad, evergreen leaves
• What is the most limiting factor for plant growth in a rainforest?
• What would be the second most limiting factor for plant growth?
• Tropical Rain Forests
• Most productive biome
• Tree tops form a continuous layer: canopy, competition for light
• Epiphytes: grow on branches of other trees
• Tropical Rain Forest
• Filling such niches enables species to avoid or minimize competition and coexist.
• What is this called?
• How have plants adapted to the rainforest environment?
• How humans have misused the rainforests…
• Logging
• Agriculture
• Poaching
• Drilling for oil
• Check for Understanding:
1. Where are tropical rain forests found?
2. Why should we protect them?
3. Describe the soil.
4. How do the populations reduce competition for resources in a rain forest?