2026 biology talkshow:大自然的餐桌-破解生物營養級密碼 (國中生物單元十)

深入探討生態學中的生物營養級概念，解釋了生物如何透過「吃與被吃」來獲取太陽能。指出營養級並非單一的固定階層，而是可以透過加權平均公式計算出的數值，例如人類的全球平均營養級僅約 2.21，與豬隻相仿。特別強調分解者在生態系統中的「幽靈」地位，牠們透過碎屑食物網將物質能量重新循環。科學家目前能利用穩定同位素分析技術，精準追蹤生物的真實飲食結構與位階。最後，警示生物放大作用的風險，提醒毒素會隨著營養級的提升而大幅累積，影響高階掠食者的健康。聽完後可以自主進行線上測驗，檢視學習成效喔~(需要登入gemini) 測驗網址 https://gemini.google.com/share/864b576204e8 Powered by Firstory Hosting

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2026 biology talkshow:大自然的餐桌-破解生物營養級密碼 (國中生物單元十)

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