Extra Populations Flashcards
GPP - NPP = ?
Respiration
Give 2 examples of primary succession environments
New volcanic islands, rocks uncovered by glaciers
Give an example of a pioneer species
Moss
What 3 factors affect succession?
Migration, inter specific competition, facilitation
How does migration affect succession?
The arrival of seeds/animals is vital as alters the community and soil
How does inter specific competition affect succession?
Two species cannot have the same niche = fight for survival
How does facilitation affect succession?
The invasion of later species depends on the conditions created by earlier colonists.
What can carbon be used for?
Forms carbohydrates, proteins and fats
What does respiration do with carbon?
Adds CO2 to the air
What does photosynthesis use co2 for?
Removes CO2 from the atmosphere
What does decomposition do with carbon?
Releases CO2 into the atmosphere as proteins and fats are broken down
Describe the greenhouse effect?
Radiation from the sun heads for Earth, some radiation is reflected, some radiation reaches the earths surface and is absorbed or remitted, this radiation is absorbed by greenhouse gases
Why is the greenhouse effect increasing?
Burning fossil fuels, deforestation, methane, CFCs
What are the consequences of global warming?
Ice melting, extreme weather, availability of water decreases, migration, food production decrease, sea pH changes
Name 4 ways humans impact the nitrogen cycle
More fertilizers increase the Haber process and nitrogen fixation, ploughing, drainage systems decreases waterlogging and denitrification, more leguminous plants increase nitrogen fixation
Why does a food chain sustain no more than 6 transfers?
Insufficient energy available to support another level
Give an advantages of re introduction?
Increases biodiversity
Why is illegal re introduction bad?
May spread disease, destruction of land, wrong habitat
What should be considered before reintroduction?
Effect on environment, research, correct type of species
What molecule contains sulfur?
Proteins
Why are more species going extinct?
Species adaptations unsuitable to environment, cant adapt quickly, increase in human population
