Global Warming Ecosystem Response Migration Goddard High School

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Presentation transcript:

Global Warming Ecosystem Response Migration Goddard High School Nature has always had to adapt to changing climate conditions. But the fear is that the changes currently under way are simply too rapid for species to evolve new strategies for survival. Goddard High School

Migration Global Warming has caused migration of plants and animals to cooler climates Those most susceptible to migration problems: Geographically localized species Highly specialized species Species living on the edge of their range Poor dispersing species Specialized=feed on only one thing

Plant Migration If the Earth warms 2 deg. C in the next 100 years, plants will have to migrate at a rate of 2 mi. per year That rate is more than 5 times higher than migration rates due to climate change before human influence The projected warming leads scientists to believe that plants will have to migrate more than 5 times faster than they have before due to climate change that wasn’t a result of human activity

Plant Migration May result in loss of biodiversity Need for “highly mobile and opportunistic” species especially a problem for “nut-bearing” plants or those that spread seeds by wind Plants will have to migrate 5 times faster than in natural warming from the past

Plant Migration Possible Benefits: Increase in CO2 is a positive feedback mechanism Some scientists argue that the increase in CO2 will cause plants to thrive overall, thus reversing the effect

Animal Migration: Birds Numerous studies of 103 bird species have shown that these birds have been arriving earlier in the second half of the 20th century than they did in the first Chiffchaff- numerous studies

Animal Migration: Fish Mainly a problem for freshwater fish temperature in water of lakes and streams raises freshwater fish (attempt to) migrate to cooler waters Examples: Trout and Salmon Freshwater because sea water pretty much constant

Animal Migration: Red Fox The Red Fox, originally inhabiting North America and Eurasia, is now migrating north into the territory of the Arctic Fox due to warming. When competing for resources the Red Fox usually wins, endangering the survival of the Arctic Fox Most threatening right now

Why is Migration a Problem? Many have nowhere to migrate Many cannot migrate fast enough Migration will cause increase of invasive species

Many Have Nowhere to Migrate Draining of wetlands, deforestation, and development of coastlines leaves limited options for migration draining of wetlands, deforestation, and development of coastlines