列举三个以生态系统为背景的研究领域，并分别用一句英文介绍它们。
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1. **Conservation Biology** - This field focuses on the preservation of biodiversity and the protection of ecosystems from degradation and loss.  
2. **Ecological Modeling** - It involves the use of mathematical models to understand and predict the dynamics of ecosystems and the interactions within them.  
3. **Restoration Ecology** - This area is dedicated to the repair and recovery of damaged or destroyed ecosystems, aiming to restore their structure, function, and biodiversity.
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