Ecosystems

• abiotic factors of wind, oxygen, sunlight, water and temperature effect organisms
• with no oxygen respiration in plant roots cannot occur so other animals cant feed on them
• bitotic factors is predetors, mating and disease
• trophic levels is the position of organisms with a food chain and describes its feeding relationship with other organisms
• pyramid of numbers can be inverted and hard to count
• pyramids of biomass shows mass of dried animals and involves killing them and time consuming
• pyramids of energy is the most accurate way to represent
• gross primary productivity can be used to quantify how productive an ecosystem is
• net primary productivity is the value after respiration of energy taken
• weather is a state of the atmosphere at a particular time and place
• climate is the average weather pattern in an area over many years
• enzyme controlled activities, embryos of gender and species distribution are affected by climate change
• with cilmate change theres a risk of flooding from ice melting and volume of the ocean increases
• depletion of resources is the reduction in the number of something
• sustainability is the ability to maintain something at a certain rate
• humans influence ecosystems by population increase, engines releasing huge quantities of exhaust gases, rainforests being taken down for crops and deep mines
• the IPCC is the intergovernmental panel on climate change
• methane has increased by 150% since 1750 and is 72x greater than carbon dioxide