A synthesis of the effects of cheatgrass invasion on US Great Basin carbon storage
A synthesis of the effects of cheatgrass invasion on US Great Basin carbon storage
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欺骗草入侵对美国大盆地碳储存影响的综合
DOI：
10.1111/1365-2664.13770
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发表时间：
2020
影响因子：
5.7
通讯作者：
Macinnis‐Ng, ed., Cate
中科院分区：
文献类型：
--
作者：
Nagy, R. Chelsea;Fusco, Emily J.;Balch, Jennifer K.;Finn, John T.;Mahood, Adam;Allen, Jenica M.;Bradley, Bethany A.;Macinnis‐Ng, ed., Cate
非本地，入侵Bromus tectorum（cheatgrass）在美国西部大盆地生态区的山艾树生态系统中普遍存在，与本地植物竞争并促进更频繁的火灾。因此，Cheatgrass的入侵可能会改变该地区的碳（C）储存。许多研究已经测量了一种或多种常见植被类型中的C库：原生山艾树，入侵山艾树和以千草为主（经常被烧毁）的网站，但这些结果尚未被综合。我们进行了文献综述，以确定评估入侵对地上生物量（AGB），地下生物量（BGB），凋落物，有机土壤和总土壤中C储存的影响的研究。我们确定了41篇文章，其中包含386项独特的研究，并估计了整个游泳池和植被类型的碳储量。我们使用线性混合模型来确定碳储存的主要预测因子。我们发现生物量C随着入侵而一致下降：在Cheatgrass中AGB C（40 ± 4 g C/m2）比天然荞属植物（89 ± 27 g C/m2）低55%，并且在Cheatgrass中BGB C（90 ± 17 g C/m2）比天然荞属植物（238 ± 60 g C/m2）低62%。相比之下，猫草中的窝C（154 ± 12 g C/m2）比天然山艾（32 ± 12 g C/m2）高>4倍。在顶部10厘米的土壤有机碳（SOC）显着高于在本地或入侵的蒿属植物在猫草。20 cm以下的有机碳与最近一次火灾发生的时间显著相关，火灾发生后5年以上，旱麦草深层有机碳损失明显。不同植被类型土壤全碳含量变化不显著。Cheatgrass的入侵降低了生物多样性和牧场生产力，并改变了火灾状况。我们的研究结果表明，Cheatgrass入侵也会导致持续的生物量碳（C）损失，这与山艾树的替代有关。我们估计，从原生山艾树转换到cheatgrass导致净减少碳储存的生物量和凋落物的76克C/平方米，或16 Tg C整个大盆地没有管理措施，如原生山艾树恢复或cheatgrass去除。
Non‐native, invasiveBromus tectorum(cheatgrass) is pervasive in sagebrush ecosystems in the Great Basin ecoregion of the western United States, competing with native plants and promoting more frequent fires. As a result, cheatgrass invasion likely alters carbon (C) storage in the region. Many studies have measured C pools in one or more common vegetation types: native sagebrush, invaded sagebrush and cheatgrass‐dominated (often burned) sites, but these results have yet to be synthesized.We performed a literature review to identify studies assessing the consequences of invasion on C storage in above‐ground biomass (AGB), below‐ground biomass (BGB), litter, organic soil and total soil. We identified 41 articles containing 386 unique studies and estimated C storage across pools and vegetation types. We used linear mixed models to identify the main predictors of C storage.We found consistent declines in biomass C with invasion: AGB C was 55% lower in cheatgrass (40 ± 4 g C/m2) than native sagebrush (89 ± 27 g C/m2) and BGB C was 62% lower in cheatgrass (90 ± 17 g C/m2) than native sagebrush (238 ± 60 g C/m2). In contrast, litter C was >4× higher in cheatgrass (154 ± 12 g C/m2) than native sagebrush (32 ± 12 g C/m2). Soil organic C (SOC) in the top 10 cm was significantly higher in cheatgrass than in native or invaded sagebrush. SOC below 20 cm was significantly related to the time since most recent fire and losses were observed in deep SOC in cheatgrass >5 years after a fire. There were no significant changes in total soil C across vegetation types.Synthesis and applications. Cheatgrass invasion decreases biodiversity and rangeland productivity and alters fire regimes. Our findings indicate cheatgrass invasion also results in persistent biomass carbon (C) losses that occur with sagebrush replacement. We estimate that conversion from native sagebrush to cheatgrass leads to a net reduction of C storage in biomass and litter of 76 g C/m2, or 16 Tg C across the Great Basin without management practices like native sagebrush restoration or cheatgrass removal.
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重复燃烧对以雀麦 (Bromus tectorum) 为主的生态系统中植物和土壤碳和氮的影响
影响因子：
4.9
作者：
Rachel O. Jones;J. Chambers;Dale W. Johnson;R. Blank;D. Board
通讯作者：
D. Board
影响因子：
2.6
作者：
Pilliod DS;Welty JL;Arkle RS
通讯作者：
Arkle RS
DOI：
10.1073/pnas.1908253116
发表时间：
2019-11-19
影响因子：
11.1
作者：
Fusco, Emily J.;Finn, John T.;Bradley, Bethany A.
通讯作者：
Bradley, Bethany A.
北美大盆地公共牧场植被治理七十五年
DOI：
10.1016/j.rala.2016.12.001
发表时间：
2017
期刊：
Rangelands
影响因子：
--
作者：
D. Pilliod;Justin L. Welty;G. Toevs
通讯作者：
G. Toevs
雀麦对火灾的反应因气候条件而异
影响因子：
3.7
作者：
Kimberley T. Taylor;T. Brummer;L. Rew;M. Lavin;B. Maxwell
通讯作者：
B. Maxwell