Flashcards in Topic 7 Deck (12):
What is Biodiversity?
Biodiversity is the variety of different species of organisms on earth or within an ecosystem
What caused a large increase in human population?
Due to advancements in medicine and farming
How does human pollution effect water, land and air?
Water- Sewage and toxic chemicals in lakes and rivers
Land- Toxic chemicals used for farming as well as nuclear waste
Air- Smoke and acidic gases released into the atmosphere
What is abiotic factors?
Non living factors of the environment like temperature
What is Biotic?
Living factors of the environment like food
What 4 things do species rely on?
How do abiotic factors effect an ecosystem?
Carbon dioxide level (for plants)
Wind intensity and direction
Oxygen level (for aquatic animals)
Soil pH and mineral content
How do biotic factors effect an ecosystem?
Competition- One species may out compete other species
Availability of food
How do you collect data with a transect?
Mark out a line
Collect data along the line
Count all organisms that touch the line
How does availability of water effect the distribution of organisms?
Some animals and plant species changes during the dry and wet season e.g Wildebeest migrate to the north and south of Africa
How does temperature effect the distribution of organisms?
Bird species in Germany is changing due to temperature e.g European bee-eater which is a Mediterranean specieS but is found in Germany