By World Wildlife Fund
Climate change leads to a loss of species
Our planet is warming faster than at any time in the past 10,000 years. With these changes, species have to adapt to new climate patterns (variations in rainfall; longer, warmer summers etc).
Global warming resulting from human emissions of greenhouse gases. The consequences include habitat loss; shifts in climatic conditions and in habitats that surpass migrational capabilities; altered competitive relationships.
Changes already underway
Evidence suggests that the warming of the past century already has resulted in marked ecological changes, including changes in growing seasons, species ranges, and patterns of seasonal breeding.
Growing need for adaptations
The fate of many species in a rapidly warming world will likely depend on their ability to migrate away from increasingly less favorable climatic conditions to new areas that meet their physical, biological, and climatic needs.
Selection of the fastest?
WWF scientists have estimated that most species on this planet (including plants) will have to "move" faster than 1,000 metres per year if they are to keep within the climate zone which they need for survival.
Many species will not be able to redistribute themselves fast enough to keep up with the coming changes.
These species, as far as we know given present knowledge, may well become extinct.