INTRODUCTION TO BIOGEOGRAPHY

INTRODUCTION TO BIOGEOGRAPHY - INTRODUCTION TO BIOGEOGRAPHY...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
INTRODUCTION TO BIOGEOGRAPHY * the geography of flora (plants) and fauna (animals) ** Basic ideas: Biodiversity or biological diversity : the variety of life forms, the ecological roles they perform and the genetic diversity they contain * # of species (life forms): 1.75 million identified & described; Estimates of between 3.7 & 111 million species, with a working estimate 13.62 million. (Fig. 19.4, pg 610) (Table 20.1.1, p 662) Types of diversity: T Genetic Diversity: variety in the genetic makeup among individuals within a species Species Diversity: variety among the species or distinct types of organisms found in different habitats of the planet d Ecological Diversity: variety of forests, deserts, grasslands, streams, lakes, oceans, coral reefs wetlands & other biological communities Functional Diversity: biological & chemical processes or functions such as energy * Processes: (Fig 19.2, p 608) * photosynthesis * energy flow * ecological efficiency: Trophic levels, food webs * * geographic dispersal : Physical factors, Biotic factors Basic Building Blocks: B * Matter: from subatomic particles to ecosystems * atom –> molecules –> protoplasm –> cells –> tissues –> organs –> organ systems –> organisms –> populations –> communities –> ecosystems –> biosphere * based on atoms : protons, electrons, neutrons, ions
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
elements : non-human made (‘natural’) & human-made compounds ** 2 Sub-Areas: Phytogeography Zoogeography Plant distributions Animal distributions Photosynthesis: * occurs in the cells of plants which contain chloroplasts , which contain the pigment chlorophyll (Fig. 19.5, pg 612) 6 CO 2 + 6 H 2 O + energy ------------> C 6 H 12 O 6 + 6 H 2 O + 6 O 2 (sunlight) (glucose) * the above process is broken down into several steps, the major two being the Light reactions (Calvin Cycle) ** Limitations of photosynthesis : * rate of respiration by the plant (where the plant uses some of the energy-food created in photosynthesis; also involves glycolysis ) * If increase respiration then decrease efficiency of photosynthesis * If increase heat then increase respiration * availability of water * If increase water then increase CO2 uptake by plant which increases photosynthesis * rate of evaporation & transpiration * if increase rate of evapotranspiration then decrease efficiency of photosynthesis ** Results of photosynthesis:
Background image of page 2
** creation of Biomass or useful chemical energy (plant & animal) (Fig. 19.6, p 612) (Table 19.1, p 614) * plant biomass or phytomass is created directly by photosynthesis
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

INTRODUCTION TO BIOGEOGRAPHY - INTRODUCTION TO BIOGEOGRAPHY...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online