Biodiversity effect human have on ecosystem

• Why is there less land available for organisms?

  humans use land for building quarrying farming and dumping waste
• why does deforestation happen?

  clear land for farming e.g. cattle and rice crops produce more food. grow crops so biofuels produced
• problems of deforestation

  amount of carbon dioxide removed from atmosphere during photosynthesis reduced. less carbon dioxide locked up. release carbon dioxide into atmosphere. carbon dioxide released when trees burnt clear land. when microorganisms feed in wood release carbon dioxide when respire
• what are bogs?

  areas of land that are acidic and waterlogged
• what happens to plants that live in bogs?


  not fully decay because not enough oxygen rotted plants form peat. carbon in plants stored in peat not released in atmosphere
• why does destroying peat bogs add more carbon dioxide to atmosphere?

  when area drained so area can be used as farmland come into contact with air microorganisms start decompose. when microorganism respire produce carbon dioxide to atmosphere. carbon dioxide released when burnt as fuel
• what does destroying peat bogs reduce?

  habitats of organisms and microorganisms reduce biodiversity
• why is biodiversity important?

  make sure ecosystems stable by reducing dependance of one species on another for food, shelter and maintain physical environment
• Why has the population increased so much?

  modern medicine and farming methods reduced number of people die from disease and hunger
• what is the effect if more waste produced?

  sewage and toxic chemicals pollute lakes and oceans effect plants and animals in sea. fertilisers washed into river. land pollution because toxic chemicals from farming burying nuclear waste underground dumping household waste in landfill sites. air pollution smoke and acidic gases released into atmosphere e.g. sulfur dioxide cause acid rain
• Why is biodiversity hard to maintain?

  conflicting pressures
• how is money involved with biodiversity?

  protecting biodiversity cost money. farmers paid maintain hedgerows and field margins. money used for other things
• how is people livelihood put at risk because of biodiversity?

  deforestation good for biodiversity. but people involved in tree felling industry lose jobs.
• what is the conflict between food security and biodiversity?

  pathogens and pests killed by farmers maintain and protect crops for food production. but killing pests reduce biodiversity
• what does development have to do with biodiversity?

  land in very high demand. so untouched land with high biodiversity have to be used for developments. e.g. building houses