human influence on the environment

water vapour carbon dioxide nitrous oxide methane

respiration burning fossil fuels

food waste

burning coal

allows earth maintain stable temperature suitable for life, greenhouse gases in the atmosphere trap heat when reflected keeping the earth warm

global warming sea level raise ice caps melt flooding habitat destruction climate change

faeces and other organic waste

species that tend to only be present when an aquatic ecosystem is healthy

aerobics bacteria in water polluted by sewage use the dissolved oxygen in the water as they break down organic materials, the lack of oxygen will kill larger organisms like fish, sewage can also contain pathogenic bacteria which are dangerous to humans

• leaching of nitrogen waste into the river • eutrophication, algal bloom formed on the surface • algal bloom is blocking the sunlight • death of benethic plants , due to no sunlight = no photosynthesis • decomposition and bacteria increase • fish need oxygen to respire • no plants= no oxygen • death of fishy BIODIVERSITY DECREASE

permanent removal of forested area due to a change in land use or due to logging

decrease in trees permanent man-made destruction of habitat large scale consequences of global warming trees are carbon sinks

burning dead trees decomposition of dead trees less photosynthesis

combustion releases carbon dioxide no trees= no carbon dioxide absorption

fungi and bacteria respire as they decompose= releasing carbon dioxide

less carbon stored as biomass=increase of carbon dioxide in the atmosphere

habitat destruction extinction of species global warming soil erosion leaching of mineral ions increase carbon dioxide emission