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9.1. Are ecosystems less adaptable now to Climate Change?
Ecosystems
might not adapt to climate
change as they had done in earlier periods because:
- the rate of climate
change is projected to be faster than in the previous 10 000
years;
- human activities have altered many ecosystems;
- pollution has increased.
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9.2. Is the speed of Climate Change detrimental to ecosystems?
Because the temperatures are expected to change
faster, plants may be required to migrate to more suitable areas
faster than their maximum migrating speed. This would result in:
- changes in species composition and flora degradation,
which may accelerate climate
change;
- a degradation of natural wildlife habitats, which
may increase the prevalence of pest species.
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9.3. Has man affected the adaptability of ecosystems?
Humans activities are occupying larger portions
of land, resulting in fewer large contiguous ecosystems. Therefore,
some species may not be able to effectively migrate to more suitable
locations.
Also, many species are already weakened by air pollution.
And although the increased CO2 concentration
should be beneficial to many plants, its net effect on ecosystem
productivity could be limited by other factors.
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9.4. Which ecosystems would be the most affected?
Higher latitude and coastal ecosystems are most
likely to experience the most severe effects from climate
change. More...
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