Ecosystem Recovery from Disturbance is Constrained by N Cycle Openness, Vegetation-Soil N Distribution, Form of N Losses, and the Balance Between Vegetation and Soil-Microbial Processes
Ecosystem Recovery from Disturbance is Constrained by N Cycle Openness, Vegetation-Soil N Distribution, Form of N Losses, and the Balance Between Vegetation and Soil-Microbial Processes
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生态系统从干扰中恢复受到氮循环开放度、植被-土壤氮分布、氮损失形式以及植被与土壤-微生物过程之间的平衡的制约
DOI：
10.1007/s10021-020-00542-3
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发表时间：
2020
期刊：
影响因子：
3.7
通讯作者：
Griffin, Kevin L.
中科院分区：
文献类型：
--
作者：
Rastetter, Edward B.;Kling, George W.;Shaver, Gaius R.;Crump, Byron C.;Gough, Laura;Griffin, Kevin L.
我们提出了一个评估陆地生态系统从干扰中恢复的生态地球化学框架。我们确定了三个恢复阶段。在第一阶段，氮从土壤有机质重新分配到植被中，但生态系统继续失去氮，因为恢复的植被不能像从土壤中释放的那样快地吸收氮。在第二阶段，生态系统开始重新积累氮，并收敛于准稳定状态，其中植被和土壤微生物过程处于平衡状态。在第三阶段，植被和土壤微生物过程保持平衡，生态系统缓慢地重新积累剩余的氮。阶段3遵循平衡累积轨迹，该轨迹沿着渐进地接近真实稳定状态的准稳定状态的连续体。我们研究了三个生态系统属性对恢复的影响：氮循环的开放性，氮在植被和土壤之间的分布和周转，以及氮损失的比例是在耐火材料的形式。开放加剧了第1阶段的氮损失，但加速了第2和第3阶段的恢复。植被中生态系统氮的高比例，导致植被中的氮周转缓慢，但土壤中的氮周转快，加剧了第1阶段的氮损失，但在第2和第3阶段的速度恢复。高比例的耐火材料形式的氮损失减轻了阶段1的氮损失，并加速了阶段2和3的回收。我们的概念框架的应用需要经验认识的连续准稳态构成的平衡积累轨迹和平衡积累轨迹和真正的稳态之间的区别。
We present a framework for assessing biogeochemical recovery of terrestrial ecosystems from disturbance. We identify three recovery phases. In Phase 1, nitrogen is redistributed from soil organic matter to vegetation, but the ecosystem continues to lose nitrogen because the recovering vegetation cannot take up nitrogen as fast as it is released from soil. In Phase 2, the ecosystem begins re-accumulating nitrogen and converges on a quasi-steady state in which vegetation and soil-microbial processes are in balance. In Phase 3, vegetation and soil-microbial processes remain in balance and the ecosystem slowly re-accumulates the remaining nitrogen. Phase 3 follows a balanced-accumulation trajectory along a continuum of quasi-steady states that approaches the true steady state asymptotically. We examine the effects of three ecosystem properties on recovery: openness of the nitrogen cycle, nitrogen distribution in and turnover between vegetation and soils, and the proportion of nitrogen losses that are in a refractory form. Openness exacerbates Phase 1 nitrogen losses but speeds recovery in Phases 2 and 3. A high fraction of ecosystem nitrogen in vegetation, resulting from nitrogen turnover that is slow in vegetation but fast in soil, exacerbates Phase 1 nitrogen losses but speeds recovery in Phases 2 and 3. A high proportion of nitrogen loss in refractory form mitigates Phase 1 nitrogen losses and speeds recovery in Phases 2 and 3. Application of our conceptual framework requires empirical recognition of the continuum of quasi-steady states constituting the balanced-accumulation trajectory and a distinction between the balanced-accumulation trajectory and the true steady state.
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影响因子：
4
作者：
R. Yanai
通讯作者：
R. Yanai
影响因子：
3.7
作者：
J. Compton;T. D. Hooker;S. Perakis
通讯作者：
J. Compton;T. D. Hooker;S. Perakis
使用养分分配比评估生物地球化学对生态系统干扰的响应的框架
影响因子：
3.7
作者：
J. Kranabetter;K. McLauchlan;S. Enders;J. Fraterrigo;P. Higuera;J. Morris;E. Rastetter;R. Barnes;B. Buma;D. Gavin;L. Gerhart;L. Gillson;P. Hietz;M. Mack;B. McNeil;S. Perakis
通讯作者：
S. Perakis
影响因子：
3.7
作者：
Rastetter, Edward B.
通讯作者：
Rastetter, Edward B.
DOI：
10.1086/284017
发表时间：
1982-11
期刊：
The American Naturalist
影响因子：
--
作者：
J. Newbold;R. O'Neill;J. Elwood;W. V. van Winkle
通讯作者：
J. Newbold;R. O'Neill;J. Elwood;W. V. van Winkle