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首页> 外文期刊>Restoration ecology >Ecosystem Changes Following Restoration of a Buckthorn-Invaded Woodland
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Ecosystem Changes Following Restoration of a Buckthorn-Invaded Woodland

机译：恢复沙棘入侵林地后的生态系统变化

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摘要

Shifts in plant-community composition following habitat degradation and species invasions can alter ecosystem structure and performance of ecosystem services. In temperate North American woodlands, invasion by aggressive Eurasian shrubs has produced dense thickets with depauperate understory vegetation and increased rates of litter decomposition and nutrient cycling, attributes that could impair storage of carbon as soil organic matter (SOM). It is important to know if such impairment has occurred and, if so, the extent to which restoration can return this service. We used an oak-woodland restoration chronosequence in northeastern Illinois to contrast structural and functional attributes of unrestored areas dominated by Rhamnus cathartica (common buckthorn) with areas that had undergone buckthorn removal and ongoing, active management for less than 1 to 14 years. With increasing age, restored areas had higher understory plant diversity and cover (p < 0.0001 and 0.005, respectively) and higher litter mass (p = 0.018). These structural differences were associated with some evidence of reduced soil erosion (p = 0.027-0.135) but greater soil CO_2 efflux (p = 0.020-0.033). Total particulate organic matter (POM) in the soil increased with restoration age, which was driven by increases in the slow-turnover, mineral-associated SOM fraction. However, variance was high and relationships were only weakly significant (p = 0.082 and 0.083 for total POM and mineral-associated SOM, respectively). Our results suggest that, in addition to better documented biodiversity benefits, beneficial changes to ecosystem properties and processes may also occur with active, long-term restoration of degraded woodlands.
机译：生境退化和物种入侵后植物群落组成的变化会改变生态系统的结构和生态系统服务的性能。在北美温带林地，侵略性的欧亚灌木入侵产生了茂密的灌丛，灌木丛下层植被退化，凋落物分解和养分循环的速率增加，这些特性可能会损害碳作为土壤有机质（SOM）的存储。重要的是要知道是否发生了这种损害，如果发生了这种损害，恢复可以在多大程度上恢复该服务。我们使用了伊利诺伊州东北部的橡树林恢复时间序列，对比了以鼠李（Rhamnus cathartica）（常见的沙棘）为主的未复原区域与经过沙棘去除和持续有效管理不到1至14年的区域的结构和功能属性。随着年龄的增长，恢复区的林下植物多样性和覆盖度更高（分别为p <0.0001和0.005）和凋落物质量更高（p = 0.018）。这些结构上的差异与减少土壤侵蚀（p = 0.027-0.135）但增加土壤CO_2流出量（p = 0.020-0.033）的一些证据有关。土壤中的总颗粒有机物（POM）随着恢复年龄的增长而增加，这是由与矿物相关的SOM慢周转率增加引起的。但是，方差很高，并且关系仅是微弱的（总POM和与矿物相关的SOM分别为p = 0.082和0.083）。我们的结果表明，除了有更好的文献记载的生物多样性收益外，积极，长期恢复退化的林地还可能对生态系统特性和过程产生有益的变化。

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  • 来源
    《Restoration ecology》 |2014年第1期|89-97|共9页
  • 作者

    Daniel J. Larkin; James F. Steffen; Rachel M. Gentile; Chad R. Zirbel;

  • 作者单位

    Plant Science and Conservation, Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, IL 60022, U.S.A.;

    Plant Science and Conservation, Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, IL 60022, U.S.A.;

    Plant Science and Conservation, Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, IL 60022, U.S.A. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, U.S.A.;

    Plant Science and Conservation, Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, IL 60022, U.S.A. Department of Plant Biology, Michigan State University, East Lansing, MI 48824, U.S.A.;

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  • 正文语种 eng
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  • 关键词

    carbon sequestration; chronosequence; erosion; plant diversity; Rhamnus cathartica; soil organic matter;

    机译：碳汇;时间序列;侵蚀;植物多样性;鼠李土壤有机质;

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