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Rising Sea Levels : Increased Range And Abundance Of Pest?

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Alpine and Subalpine Increased Range and Abundance of Pests
Eg ship rats don’t like the area between 800 metres and the treeline, which means there is a ‘safety belt’ where small birds can breed without being under threat from these pests.
Increased Range and Abundance of Weeds
Bunnies at 1800 metres on ruapehu- when normally they don’t go above 1000. Snow Cover

Coastal and Oceanic Shifting habitats, changing breeding seasons and migration patterns, advantages for pests and weeds Rising Seas
Sea level rise, caused largely by the expansion of ocean water as it heats and the melting of glaciers and ice caps will be a threat to our ecosystems. Rising sea levels will increase the relative frequency and intensity of storm surges …show more content…

While this will protect the infrastructure (you don't want a house in an estuary) on the coast by blocking out the water, it effectively means that the ecosystem will be ‘squeezed out’. As sea levels rise and push ecosystems back- there won't be anywhere to go as they will be blocked by storm infrastructure or be drained/infilled. This is problematic as estuaries are vital ecosystems- nurseries and resting areas for marine mammals, birds and fish. As are mudflats and beaches- with beaches especially guarding against erosion. Mitigation options for this ‘squeezing’ of coastal infrastructure really come down to whether or not we are willing to spend money to move and make room for these ecosystems to retreat. They are important as they are nursing and resting areas for native and indigenous marine species and migratory birds and fish. They are vital ecosystems whose protection must be balanced with the demands of our society. Immediately at risk species
It can be said that the dramatic decline in many of New Zealand’s is a ‘Canary in the Coalmine’, that how these seabirds populations are crashing as a result of climate change can be a prediction of what is to come. It’s a pretty pessimistic prediction, based on how these seabirds are doing.
A clear example of this is Red Billed gulls- the New Zealand native seagull. The numbers of Red Billed gulls has steeply declined by more than half- from 19000 birds to 9000

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