Introduction to Ecology

Introduction to Ecology - Introduction to Ecology 16:01...

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Introduction to Ecology 16:01 Major points • World is complicated, but patterns can be found • Our environment is living and nonliving (abiotic & biotic) • Important aspects of populations can be explained with few terms • Knowing these terms can be very useful for management and conservation What is Ecology • Interactions of organisms with each other and with their new environment (*school of fish) o Biotic environment- corals and sponges build material for coral reef o Abiotic Environment- huge currents affect structure, temperature which can affect sediments Important • Context for evolution • Management of resources • Evaluation of human impacts Ecology- Levels of Study (4major) • Organismal- Individual interactions with their environment o Ex. Kangaroo rat: doesn’t drink water because adapted to arid climate, able to extract water from low water content foods. Still can survive because it conserves water • Population- Factors regulating population growth rates and population size o Ex. Leaf, pest eats it (caterpillars, but are limited due to the size of the leaf) o Huge fluctuation in size (locusts) • Community- interactions among different species in an area o Predator vs. prey o Rainforest species to claim land for resources • Ecosystem- interactions between communities and their environments (abiotic & biotic) o Animals and current, temp, climate Abalone (snail, large mollusk- used for jewelry purposes because of irradiances) • Produce millions of eggs and off spring, why aren’t they overwhelming us? o Organismal- o Population- not every egg is fertilized, no male or current is too fast o Community- can be preyed upon at any stage, competition interactions o Ecosystem – current could be too strong, temperature too hot/cold, light Abiotic Factors • Some predictable attributes of communities based on large scale abiotic factors, e.g. o Light and latitude (Fig. 50.23) Angle of sunlight- density of sunlight, different amount of energy input Ex. Equator has dense forest Tundra no big plants because temp (cold), little sunlight miniaturization of species • Global Circulation (50.24) o Hadley cells Equator holds a lot of water because of warm air, but rises, Equator: wet moist, 30 ° N & S: dry areas (dessert) • Seasonality (50.25) o Tilt has effect, change through time Green Sahara – about 8000 years ago, Sahara desert was a lush and wet environment, until the change in tilt of the Earth’s axis • Local Geography- e.g. “ rain shadows” (50. 25) o Wet side and dry side of town in Hawaii because of rain shadow...
View Full Document

{[ snackBarMessage ]}

Page1 / 45

Introduction to Ecology - Introduction to Ecology 16:01...

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