气候变化是否会导致温带水域的藻床扩大或收缩? 来自Sargassum范围转移模式的证据
1Jiangsu Province Engineering Research Center for Marine Bio-resources Sustainable Utilization, Hohai University, Nanjing, 210024, China.
Marine environmental research
|July 31, 2024
概括
气候变化将使萨尔加索姆海藻森林在西北太平洋向北移动. 这些基础物种的本地适应可能会减轻一些息地丧失,但总体范围的收缩仍然被预测.
科学领域:
- 海洋生态海洋生态学
- 气候变化生物学
- 保护科学是一种保护科学.
背景情况:
- 像藻这样的基础物种对沿海生物多样性至关重要.
- 物种分布模型 (SDM) 预测,由于气候变化,棕藻森林将遭受重大息地丧失.
- 内部特定的局部适应可能会影响范围转移预测.
研究的目的:
- 为了预测气候变化下的西北太平洋Sargassum fusiforme和Sargassum thunbergii的范围变化.
- 研究本地适应在这些物种对气候条件变化的反应中的作用.
- 评估在温带水域的石床的潜在扩张或收缩.
主要方法:
- 根据温度和植物地理,将S. fusiforme和S. thunbergii分为北方和南方的血统.
- 使用n维超体积量化实现的血统.
- 构建血统级SDM来预测未来的分布.
主要成果:
- 两种物种的北方和南方血统之间存在显著的利基区分,这表明当地适应.
- 预计适合两种Sargassum物种的分布区域向北移动.
- 在低度地区 (东中国海) 保留一些适合息地,但不足以抵消损失.
- 观察到对气候变化的血统特异性反应.
结论:
- 当地适应在藻对气候变化的反应中发挥着作用,但范围的收缩仍然很可能.
- 为了准确的分布预测,未来对大藻的管理必须考虑种内变异.
- 保护战略需要考虑北方范围的转移和温带沿海生态系统的潜在息地丧失.
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