How does global warming affect nature?

Answer 1

Changes in climate (warmer/colder, wetter/drier) affect the ecologies present in an area. Climate change (sometimes simplistically called global warming) can induce all of these impacts. As a result the plants which grow in areas both wild and crops will change,, the animals supported by the plants will change, and human populations will have to adjust. As examples:

• droughts will turn some presently productive areas into barren deserts. For humnas this will mean no water supply for major cities.
  
• changes in warm spring wether will have food supplies for returning migratory birs out of phase with their breeding and nesting need
  
• invasive species will overcome present fish and animals - this includes insects
  
• many fish need cool water for breeding and this may change
  
• flooding with increased rainfall will alter the course of rivers
• many animals have migration routes requiring specific weather timing, these animals will not survive
• feeding and breeding grounds for arctic animals will vanish
• lowlands will flood with increased ocean levels which will destroy many low lying ecosystems