Biodiversity
Biological diversity
diversity in genes, species, habitats and ecosystems
what are the 2 types of experiments?
observational studies and manipulation studies
What is a system
What is environmental science?
What is..... study of human impact on environmental systems
global warming 5 most AFFECTED on earth?
Solar radiation, Heat absorption, Ice caps and oceans, atmosphere
estimated mammals extinct per 40,000 every 1000 years is
2 mammals
sample size =?
large enough to represent population
matter and energy exchange is?
How Sunlight, Food, Fuel, Water, Oxygen, etc. is used up
Envirnomental indicator
measure of health of a system
Anthropogenic Cause means?
CO2 increase from deforestation and burning fossil fuels
species decline is comparable to mass extinction events
a widely accepted hypothesis becomes a.;....??
theory
open and closed system is? give example
Changes depending on scale
Open- Solar radiation enters and leaves atmosphere
Ocean, Beach, Atmosphere, etc interconnect
Closed- Chemicals, nutrients, etc. contained on Earth
what does algae bloom do to the ocean
kills it
clean air laws removed leaded gas
Keystone species
major animal in environment
universal laws
energy flow consists of
flux rate and steady state
world human population, how many millions
8-12million
elephant case study positive loop
Positive Feedback- Poverty and ivory demand leads people to poach elephants
Too many elephants die, International effort to stop poaching
Overshoot- increasing deaths/endangered species
Keystone species type of threat
threat to change entire ecosystem
what is a scientific method
is to discover, test and refine explanations of phenomena through systematic observation
feedback systems what do they consist in?
Actions that either drive values back to or away from set parameters
Positive Feedback System moves away
Negative Feedback System Returns
Overshoot- Time between parameter change and correction
food production 3 most eaten calories?
rice, corn, and wheat
elephant case study neg loop
Negative Feedback if population was not affected by people
Resource for food
Disease spreading in dense populations