BSC 3052 Lecture Notes - Lecture 6: Continental Drift, Global Change
Document Summary
Rate of ice mass loss has doubled in past 7 years in greenland and. Past exincion event: overall biodiversity has grown over the last 500 million years. Current rate of exincion: 99. 9% (give or take) of all species have gone exinct, the lifespan of the average species seems to be around 1 million years. Thus for every 1 million living species, you could expect to lose 1 species to exincion per year: humans are responsible for (veriied) the exincion of between. 5 and 20% of the species in many groups. Fish: current exincion rates are esimated to be 100-1000 imes greater than pre-human rates. Global change and exincion: likely that most species will be capable of adaptaion, quesions of great importance: How quickly will temps change: mobility, within and between generaions, will primarily determine likelihood of exincion (for interacive species, this applies to hosts etc. , too)
