夜间人工光对藻类度的影响可以调解草食藻类相互作用
Roddy Jara1, Oscar Varas1, Marcela Aldana2
1Instituto One Health, Centro de Investigación Marina de Quintay (CIMARQ), Programa de Doctorado en Medicina de la Conservación, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile.
Proceedings. Biological sciences
|September 2, 2025
概括
夜间的人工光 (ALAN) 降低了红藻Mazzaella laminarioides中的化合物,使其对黑 (Tegula atra) 更有味道. 这突显了ALAN对海洋食草的影响.
科学领域:
- 海洋生物学
- 生态学
- 生物化学
背景情况:
- 人工夜间照明 (ALAN) 是越来越多的环境压力因素.
- 它对光合作用生物,特别是大藻及其与食草动物的相互作用的影响还未得到充分研究.
- 大藻类中的化合物对于阻止食草动物至关重要.
研究的目的:
- 调查ALAN对Mazzaella laminarioides中化合物的产生的影响.
- 评估ALAN如何影响食草动物Tegula atra的食行为.
- 了解ALAN对海洋草食藻类相互作用的间接影响.
主要方法:
- 在M. laminarioides中监测化合物的每日和潮变化.
- 将藻类暴露在三种光处理中:白天/夜晚,持续的黑暗和持续的光 (ALAN).
- 评估T. atra在不同光处理的藻类上的食草率,包括选择实验.
主要成果:
- 化合物度在潮期间达到峰值, 与草食动物食活动的峰值相吻合.
- 在昼夜条件下,藻类的度明显高于ALAN.
- 泰古拉阿特拉对ALAN暴露的藻类的消耗量显著增加,这表明味道增加.
结论:
- 暴露于ALAN会导致M. laminarioides中化合物的产生减少.
- 减少的化合物增加了藻类的口味,从而提高了T. atra的食草率.
- 通过改变化学防御,ALAN有可能破坏海洋草食藻类的动态.
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