Nitrogen availability and nitrification during succession: Primary, secondary, and old-field seres
Nitrogen availability and nitrification during succession: Primary, secondary, and old-field seres
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DOI：
10.1007/bf02202591
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发表时间：
1989-04
期刊：
影响因子：
4.9
通讯作者：
P. Vitousek;P. Matson;K. Cleve
中科院分区：
文献类型：
--
作者：
P. Vitousek;P. Matson;K. Cleve
营养循环变得更强有力的调节和硝化作用在生态演替过程中逐渐受到抑制的建议刺激了许多实地测量。这些结果是不一致的，在某些情况下，氮周转和硝化作用在演替过程中减少，而在其他两个increasingsubstantial.Consideration的性质的干扰，启动每个演替解释了氮动力学的差异。初级演替（生态系统在全新基质上的发展）总是涉及演替早期的低氮可用性和硝化作用。相比之下，破坏性的干扰，然后立即再生长（“纯粹的情况下”的二次演替）总是增加氮的可用性（和一般硝酸盐生产）在最近扰动的网站，其次是在继承的后期阶段下降。一段时间的慢性干扰（即长期农业）后的连续性并不遵循如此明确的模式;干扰的持续时间和强度可能会控制氮素可用性和潜在硝化作用在此类序列的早期是否增加或减少。
Suggestions that nutrient cycles become more strongly regulated and that nitrification is progressively inhibited in the course of ecological succession have stimulated numerous field measurements. Results of these are inconsistent; in some cases nitrogen turnover and nitrification decrease during succession, while in others both increase substantially.Consideration of the nature of disturbance which initiates each succession explains much of the difference in nitrogen dynamics. Primary succession (the development of ecosystems on wholly new substrates) invariably involves a low nitrogen availability and nitrification early in succession. In contrast, destructive disturbance followed by immediate regrowth (the ‘pure case’ of secondary succession) invariably increases nitrogen availability (and generally nitrate production) in recently disturbed sites; it is followed by a decline during later stages of succession. Succession following a period of chronic disturbance (i.e.prolonged agriculture) does not follow such clear patterns; the duration and intensity of disturbance may control whether nitrogen availability and potential nitrification increase or decrease early in such seres.