侵袭对淡水清洁共生系统的影响
Spencer S Bell1, Philip McElmurray1,2, Robert P Creed3
1Department of Biological Sciences, Virginia Tech, Blacksburg, VA, 24061, USA.
Oecologia
|August 3, 2024
概括
侵袭性鱼取代了本地物种,对它们的类共生生物产生了负面影响. 这种有益的共生体的丧失可能会降低本地鱼入侵的抵抗力,这引起了保护问题的关注.
科学领域:
- 生态生态学 生态生态学
- 侵入性物种 生物学 生物学
- 保护生物学 保护生物学
背景情况:
- 生物入侵威胁着生物多样性,但对本地共生动物群体的影响还未得到充分研究.
- 侵入性宿主可以对本地共生生物有益或有害,影响它们的丰富性和多样性.
- 鱼寄存于多种结体共生体 (Branchiobdellida),侵入性Faxonius物种与本地宿主相互作用.
研究的目的:
- 评估入侵鱼对本地分枝生物共生体丰富性和多样性的影响.
- 为了调查侵入性宿主越来越多的影响对共生动物社区.
- 了解对本地宿主-共生系统的生态后果.
主要方法:
- 在西弗吉尼亚州的水域进行了广泛的实地调查,具有不同的入侵水平.
- 进行了互补的宿主替换实验,以检查共生体相互作用.
- 量化分支的丰富性和多样性与鱼宿主组成有关.
主要成果:
- 随着入侵的比例的增加,Branchiobdellidan的丰富性和多样性显著下降.
- 侵袭性Faxonius cristavarius被确定为对共生者的不那么有能力的宿主.
- 同生体的存活率和分散成功率随着入侵宿主比例的增加而下降.
结论:
- 侵入性鱼通过减少它们的数量,多样性和生存,对本地共生动物社区产生负面影响.
- 本地宿主被无能力的入侵宿主所取代,危及本地宿主-共生体系统.
- 失去有益的共生生物可能会降低本地物种的入侵抵抗力,加剧生态影响并创造保护挑战.
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