Iron fertilization from Asian dust drives tertiary-level productivity of Pacific salmon

文献类型： 外文期刊

第一作者： Qiu, Yongsong

作者： Qiu, Yongsong

作者机构：

关键词： Iron fertilization; Asian dust; Ocean productivity; Ecosystem response; Climate mitigation; Sockeye salmon

期刊名称：PROGRESS IN OCEANOGRAPHY （ 影响因子：3.6； 五年影响因子：4.0 ）

ISSN： 0079-6611

年卷期： 2025 年 237 卷

页码：

收录情况： SCI

摘要： Iron enrichment in high-macronutrient, low-chlorophyll surface oceans was hypothesized to enhance primary production and carbon sinks that ultimately influence the earth's climatic system. Although the enhancement of primary production and carbon sinks has been repeatedly verified, the role of iron in upper-level production remained uninvestigated, and thus, our understanding of ecosystem responses is incomplete. In this analysis, paleorecords and modern time series are gleaned to test an extended hypothesis that tertiary-level productivity is also promoted by iron fertilization. Paleoproxies and modern records for the abundance of sockeye salmon returning to an Alaskan lake are related to climatic variables describing the flux of iron-laden Asian dust, its trans-Pacific transport, and its deposition into the iron-limited Gulf of Alaska sockeye salmon feeding ground. The linkage shows that for similar to 2,200 years, the productivity of the salmon stock has been driven by this Asian dust supply. Data from modern observations provide more direct support for the linkage between dust-iron input, primary production, and salmon abundance. This analysis indicates that iron from Asian dust drives primary through to sockeye salmon productivity via bottom-up food-web control. This understanding of the role of iron in tertiary-level production provides a basis for the artificial enhancement of ocean living resources, but questions arise regarding the efficiency of iron fertilization in climate mitigation.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序