Name: 丹尼爾．保立：海洋基準線的改變
Uploaded: 2012-02-28T17:45:21Z
Duration: 8 min 45 s
Description: 在我們有生之年，海洋生態系統逐漸衰退，魚的平均長度逐漸變小可以證明這一點。而如同丹尼爾．保立在藍色任務演講描述的，每當海洋基準線下降，我們就稱它為新的「正常」基準線。什麼時候我們才會停止向下調整這個基準線？

在我們有生之年，海洋生態系統逐漸衰退，魚的平均長度逐漸變小可以證明這一點。而如同丹尼爾．保立在藍色任務演講描述的，每當海洋基準線下降，我們就稱它為新的「正常」基準線。什麼時候我們才會停止向下調整這個基準線？

丹尼爾．保立：海洋基準線的改變

People often believe the natural world they inherit is how it has always been, overlooking dramatic losses over time. In one lagoon, fish shrank to half their former size in a generation, yet locals accepted this as normal. The phenomenon, called shifting baseline, means that as ecosystems degrade, expectations quietly move downward. Without preserving history or creating protected areas, society risks accepting only remnants of what once existed.