Tipping Points
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What is a tipping point in an ecosystem?
When environmental changes and positive feedback overwhelm resilience, converting it from one stable form to another.
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What are boreal forests considered to be?
Important carbon sinks.
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Why are boreal forests carbon sinks?
Cold slows cellular respiration of detritus while photosynthesis captures carbon in tree biomass.
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How is climate change affecting boreal forests?
It is pushing them toward a tipping point where they may become carbon sources.
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How do warm, dry summers affect boreal forests' carbon balance?
They cause droughts and fires releasing stored carbon and preventing further carbon storage.
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