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同时出现的物种的生物固活动受到它们通过降落吸收树冠上的气的能力的影响

Charlotte Blasi¹, Daniel Houle², Gaëlle Vacherand³

¹Centre Sève, Département de Chimie, Université de Sherbrooke, Sherbrooke, QC, J1K 2R1, Canada. charlotte.blasi@usherbrooke.ca.

|July 2, 2025

概括

在北极森林中的羽毛固定,但速度因树冠覆盖和沉积而异. Ptilium crista-castrensis比Pleurozium schreberi具有更高的生物固定,特别是在成熟的森林中.

科学领域:

生态生态学生态生态学
生物地质化学生物地质化学
森林科学森林科学森林科学

背景情况:

羽的生物固定 (BNF) 是北极生态系统中一个关键的源.
了解树冠状况和沉积如何影响BNF率对于北极森林管理至关重要.

研究的目的:

为了研究气候变量和沉积化学对BNF的影响.
为了比较不同森林微息地中两种同时出现的羽毛物种 (Pleurozium schreberi和Ptilium crista-castrensis) 的BNF率和吸收策略.

主要方法:

在两个生长季节内监测气候变量,生物N2固定,蓝藻生物质和的特征.
现场和实验室实验使用15N标记剂来评估从沉积物中提取的情况.
在成熟森林中比较BNF与森林间隙 (风暴).

主要成果:

这两种羽毛物种在森林空隙中表现出相似的BNF.
在成熟森林中,BNF在两种物种中都下降,但显著高 (约. 在P.crista-castrensis中比在P.schreberi.中增加了10倍).
在成熟森林中减少的BNF与不太有利的气候条件有关,对于P. schreberi来说,通过降落增加了吸收,抑制了蓝藻细菌.

结论:

羽毛物种对影响BNF的环境变化做出不同的反应.
覆盖状况和沉积化学在北极森林中调节BNF和循环中起着截然不同的作用.
与P. schreberi. 相比,P. crista-castrensis可能对改变的沉积更有弹性.

关键词:

黑杉树林是黑杉树林中的一个.气候变量气候变量气候变量同时出现的物种.与相关的固定.的沉积沉积的沉积.固定的驱动因素固的驱动因素

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