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玻里亚和卢西塔尼亚的物种在温带水域表现出热带的变化
Morgane Amelot1,2, Marianne Robert2, Maud Mouchet1
1Centre d'Ecologie et des Sciences de la Conservation UMR 7204 MNHN-CNRS- Sorbonne Université, Muséum national d'Histoire naturelle de Paris Paris France.
Ecology and evolution
|November 29, 2023
概括
气候变化正在改变凯尔特海的鱼类饮食. 冰水物种是冷水物种.
科学领域:
- 海洋生态海洋生态学
- 气候变化影响气候变化的影响.
- 稳定的同位素分析.
背景情况:
- 气候变化导致物种分布和丰度的非线性变化,影响生态系统的结构和功能.
- 热带相互作用对气候驱动的变化敏感,特别是在生物地理过渡区.
- 凯尔特海是一个温带地区,拥有北极 (冷附属) 和卢西塔尼亚 (温暖附属) 物种,非常适合研究气候对食物网的影响.
研究的目的:
- 为了研究凯尔特海底鱼类种类中热带结构的变化.
- 分析气候变化如何影响北极和卢西塔尼亚物种的食用特征 (面积,宽度,位置).
- 为了评估这些热带变化的时间和空间动态,在一个定义的时期.
主要方法:
- 使用碳和稳定同位素比率 (δ13C和δ15N) 来推断养关系.
- 量化了10种丰富的底生鱼类的热带区面积,宽度和位置.
- 在凯尔特海内分析了跨空间梯度和时间尺度 (2014-2021) 的数据.
主要成果:
- 观察到一个总体趋势,即北极物种的食物缩,而卢西坦尼亚物种的食物扩大.
- 在短时间内,受物种热偏好影响,在食用中表现出快速的修改.
- 鉴定了北极物种的热带宽的空间变化,这表明与卢西塔尼亚物种的资源竞争加剧.
结论:
- 凯尔特海的热带正在动态地应对气候变化,对于北极和卢西坦尼亚物种有不同的模式.
- 在不断变化的环境条件下,物种的热偏好在调解热量利基转移方面发挥着至关重要的作用.
- 热带生态指标对于监测气候引起的生态系统变化至关重要,可能揭示了对温带生态系统脆弱性的低估.
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