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大藻类的本土碳负载刺激了浅海沿海海洋沉积物中的盆地生物固速率

Yubin Raut¹, Casey R Barr¹, Emily R Paris²

¹Marine and Environmental Biology, University of Southern California, Los Angeles, CA, United States.

Frontiers in microbiology

|January 22, 2024

概括

宏观藻类的分解对沿海固有有重大影响,碳的可用性是关键因素. 不同的海藻类型影响微生物群落,红藻抑制固化.

科学领域:

海洋生态海洋生态学
微生物生态学微生物生态学
生物地质化学生物地质化学

背景情况:

大藻类是沿海生态系统中至关重要的初级生产者.
大藻类分解在地生物固定 (BNF) 中的作用还没有得到充分研究.

研究的目的:

调查宏藻分解对盆地BNF比率的影响.
确定有机物可用性和大藻类类型对BNF的影响.
描述在分解过程中发生的二氧化微生物群落变化.

主要方法:

从圣卡塔琳娜岛的大渔夫湾的三个地点收集了沉积物样本.
测量了BNF率,包括和没有修改 (葡萄糖,棕色,绿色和红色大藻类).
利用nifH测序来分析亚松的社区组成.

主要成果:

BNF率受到可变碳 (葡萄糖) 和棕色/绿色宏藻的刺激,但受到红色宏藻的抑制.
宏藻的分解导致了亚热菌群落的明显变化,带来了类特异性的反应.
早期的分解有利于Gammaproteobacteria,而后来的阶段显示Deltaproteobacteria,Bacteroidia和Spirochaeta的主导地位.

结论:

沿海的盆地生物被有机碳的可用性所限制.
宏藻沉积对地微生物群落具有显著的,类特异性的影响.
了解这些相互作用对于沿海生态系统的健康和营养循环至关重要.

关键词:

地N2固定地N2固定沿海海洋沉积物的沿海海洋沉积物迪亚佐特罗夫社区的社区.宏观藻类的分解 nifH安普利康序列的序列化

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