IB 203 1st Edition Lecture 1Outline of Last Lecture I. No previous lecture materialOutline of Current Lecture II. 9 terrestrial biomesa. Tropical rainforestsb. Savannahsc. Desertsd. Temperate grasslandse. Temperate shrublands and woodlandsf. Temperate deciduous forestsg. Temperature evergreen forestsh. Boreal forestsi. TundraIII. Writing hypothesisCurrent LectureTerrestrial BiomesTropical Rainforests:- Low- latitude tropics (between 10⁰N and S)- Precipitation exceeds 2,000mm a year- Warm temperatures, seasonally invariant- Substantial amount of living plant biomass- Broad leaved evergreen and deciduous treesTropical seasonal Forests and savannahs:- 23.5⁰N and S - greater abundance of grasses and shrubs and less trees- Summer dry seasonDeserts:These 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.- Sparse populations of plants and animals- Generally corresponds to descending air of Hadley cells.- Around 30⁰N and S- Low precipitation levels- High temperatures and high levels of evapotranspirationTemperate Grasslands:- From 30⁰N - 50⁰N and S- Greater seasonal temperature variation- Precipitation can be great enough to support forests in some areas- Mainly grasses and shrubsTemperate shrublands and woodlands:- Winter rainy season- Between 30⁰N and 40⁰N and S- Summer growing seasonTemperate deciduous forests:- 500 – 2500mm of rainfall each year- 30⁰N - 50⁰N - Southern hemisphere contains less land mass areaTemperate evergreen forests:- From 500 to 4,000mm of rain- latitudes between 30⁰N to 50⁰N to S- Mostly on the west coast of continentsBoreal Forest:- 50⁰N and 65⁰N - Known as Taiga- Primarily coniferous species- Largest biome in area and contains one third of earths forested land- Extensive summer droughtsTundra:- Above 65⁰N and S- Lack of trees and low temps during the growing season- Precipitation is low year-longWriting Hypothesis from graphs:From the graph: summarize the influence of the X-axis on the Y-axisEx. The greater the precipitation total, the greater the above ground productivitySummarize the influence with a condition:Ex. In a 20-year burned prairie, as the total precipitation increases as the total above ground productivity stayed the same.Summarize the overall trend:Ex. As the total precipitation increases the above ground productivity increase in both highlands and
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