Atmo 336 1st Edition Lecture 10 Outline of Last Lecture II. Agro-ecologya. Input farming= conventional farmingI. Defining organicOutline of Current Lecture III. Forestsa. Boreal forest = covers most areasb. Tropical rainforests=most primary productivityc. Temperate deciduous forestsd. Temperate rainforestse. Tropical dry (deciduous) forestsIV. Carbon storage helps limit climate changeV. Forests= ecologically complexa. Provide valuable resourcesVI. What happened to forests when settlers came to the new worldVII. Case study of palm oil plantationsCurrent Lecture- Forestso Cover 31% of earth’s land surfaceo Types of forests Boreal forest: in Canada, Scandinavia, and Russia (pine trees) Tropical rainforest= south and central America, Africa, Indonesia, and southeast asia Temperate deciduous forests: mid latitude forests in Europe, eastern china, eastern north America Temperate rainforest: coastal pacific northwest Tropical dry (deciduous forests) : India, Africa, south America, north Australia Woodlands= ecosystem with lower density of treeso Tropical rainforest and tropical deciduous forest Constant temperatures year round in both forestso Which forest biome covers the most area? Boral foresto Boreal forest Ring the regions immediately south of the arctic circle The boreal eco region accounts for the one third of this planets total forest areaThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. This broad circumpolar band runs through most of Canada, Russia, and Scandinaviao Which forest biome is responsible for the most primary productivity per area? Tropical rainforesto Tropical rainforest Southeast asia, west Africa, central and south America Year- round rain and warm temperatures Forest floor is dark and damp Lush vegetation Diverse species (but species in low densities) Very poor, acidic soils Tropical rainforest NPP about the same as open ocean NPPo Carbon storage helps limit climate change Carbon storage by forests is of great international interest- Nations debate how to control climate change Trees absorb carbon dioxide and store carbon- The world’s forests store 280 billion metric tons of C Cutting forests worsens climate change- Dead plants decompose and release carbon dioxide- Fewer trees soak up less carbon dioxide Preserving forests keeps carbon out of the atmosphere Provide cultural, aesthetic, heath, and recreation values Forests also provide vital ecosystem services- Forests are ecologically complexo Forests are some of the richest ecosystems for biodiversity They are structurally complex, with many niches They provide food and shelter for multitudes of species Fungi and microbes have parasitic and mutualistic relationships with plantso Plant diversity leads to greater overall organism diversity Succession changes species compositiono Old growth forest diversity exceeds that of young forests They have higher structural diversity, habitats, and resourceso Forests are some of the richest ecosystems for biodiversity- Forests provide us valuable resourceso Benefits: medicines, food, fuel, shelter, papero Helps us achieve a high standard of livingo Logging locations Boreal forests: Canada, Russia Rainforests: brazil, Indonesia Conifer forests/ pine plantations: USo In 2010, 30% of all forests were designated for timber production- When settlers came to the “new world”o Entire eastern half of continent used to be covered in primary (uncut by humans) forestso Most primary forest was cut for agriculture and timber upon settlers arrival- Palm oil (liquid gold ) plantationso Palm oil is used in snack foods, soaps, cosmetics, biofuel (biodiesal)o Borneo has lost significant forest covero Clearing encourages further development and illegal