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饮食脂质的出口通过新兴的昆虫从优食性鱼池出口
Lena Fehlinger1,2, Margaux Mathieu-Resuge1, Matthias Pilecky1,2
1WasserCluster Lunz - Biologische Station GmbH; Inter-university Center for Aquatic Ecosystem Research, Dr. Carl Kupelwieser Promenade 5, 3293 Lunz am See, Austria.
概括
鱼池出口大量的昆虫生物量,为陆地生态系统提供必需的脂质和脂肪酸. 然而,鱼池中较高的藻类 (Chlorophyll-a) 减少了这种营养出口,影响了陆地食物网.
科学领域:
- 生态生态学 生态生态学
- 临界技术 临界技术
- 昆虫生态学 昆虫生态学
背景情况:
- 鱼池在全球范围内很丰富,但由于它们对陆地环境的生态贡献而未得到充分研究.
- 从鱼池中出现的昆虫代表了对陆地生态系统的脂质和必需脂肪酸的潜在来源.
研究的目的:
- 研究甲度对奥地利鱼池中出现的昆虫的生物质和营养质量 (脂质,LC-PUFA) 的影响.
- 量化食补贴从鱼池出口到陆地环境的数量.
主要方法:
- 在奥地利 (2020年6月至9月) 进行了9个优食性鱼池的实地研究.
- 收集和分析了新兴昆虫种群的生物量 (n=108) 和它们的总脂质和长链多不和脂肪酸 (LC-PUFA) 含量 (n=94).
- 研究了甲度与昆虫生物质/营养素出口之间的关系.
主要成果:
- 从65.3公的鱼池中出口了总共1068公斤的新生昆虫干质.
- 鱼类和鱼类是最丰富的种类,仅鱼类就出口了103公斤的脂质和9.4公斤的欧米茄-3PUFA.
- 增加的叶绿素-a度与减少的昆虫生物质出口和减少的脂质/LC-PUFA出口相关,特别是来自Chironomidae.
结论:
- 鱼池通过通过新兴的昆虫出口必需的营养素来提供关键的生态系统服务.
- 新生昆虫的营养质量 (脂质,LC-PUFA) 与藻类不同,表明昆虫选择性保留.
- 欧型鱼池出口的昆虫生物质比以前报告的寡型湖泊更多,尽管比管理的池少.
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