Effect of sand burial on the subcritical water repellency of a dominant moss crust in a revegetated area of the Tengger Desert, Northern China
Effect of sand burial on the subcritical water repellency of a dominant moss crust in a revegetated area of the Tengger Desert, Northern China
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沙埋对腾格里沙漠植被恢复区主要苔藓结皮亚临界防水性的影响
DOI：
10.2478/johh-2020-0025
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发表时间：
2020-08
影响因子：
1.9
通讯作者：
Yang Zhao
中科院分区：
文献类型：
--
作者：
Rongliang Jia;Yanhong Gao;Lichao Liu;Haotian Yang;Yang Zhao
摘要沙埋是影响桑迪地区苔藓结皮生态和水文特性的一种普遍存在的干扰。关于沙埋对沙漠地区苔藓结皮的防水性（WR）的影响，目前还没有什么可用的信息。因此，本研究评估沙埋的效果（砂层深度为0（对照）、0.5、1、2、4和10 mm），然后是三种模拟降水方案（春、秋两季每隔8天施用蒸馏水4、6mm、2、3mm、1、1.5mm，分别）的WR的广泛的苔藓地壳占主导地位的真藓。在中国腾格里沙漠的一个重新植被的地区。结果表明，在整个沙埋试验过程中，苔藓结皮的WR值始终处于亚临界状态，沙埋后立即下降，但秋季的WR值显著高于春季（p <0.05）。此外，沙埋的深度阈值（TD）值，减少WR为零，在春季和秋季分别为1和2毫米。经过近一个季节（72天）的恢复期，苔藓结皮的WR显著增加（p <0.05）。此外，沙埋有两个独立的影响苔藓结皮WR。沙埋较浅（埋深小于0.5mm）增加了苔藓结皮的WR，而沙埋较深（埋深大于0.5mm）则降低了WR，TD值在春季和秋季分别显著增加到2和4mm。这些研究结果的影响沙埋苔藓地壳WR提供了额外的信息，可以用来更好地了解沙埋苔藓地壳殖民和维护干旱沙埋强调生态系统的影响，并帮助解释为什么有一些对比的观点生物壳WR。
Abstract Sand burial is a ubiquitous disturbance that influences the ecological and hydrological properties of moss crusts in many sandy desert areas. There is little available information regarding the effect of sand burial on the water repellency (WR) of moss crusts in desert areas. Therefore, this study evaluated the effects of sand burial (sand depths of 0 (control), 0.5, 1, 2, 4 and 10 mm) followed by three simulated precipitation regimes (through applying 4 and 6 mm, 2 and 3 mm, and 1 and 1.5 mm of distilled water at 8-day intervals in spring and autumn, respectively) on the WR of a widespread moss crust dominated by Bryum argenteum Hedw. in a revegetated area of the Tengger Desert, China. The results showed moss crust WR remained subcritical during the whole experiment, and that it considerably decreased immediately after sand burial, even though the values of WR were significantly higher in autumn than those in spring under the same treatment (p < 0.05). Furthermore, the depth threshold (TD) values for sand burials that reduced WR to zero were 1 and 2 mm in spring and autumn, respectively. After a recovery period of nearly one-season (72 days), the WR of the moss crust significantly increased (p < 0.05). In addition, sand burial had two separate effects on moss crust WR. Specifically, shallower sand burial (burial depth less than 0.5 mm) increased moss crust WR, whereas deeper sand burial (burial depth exceeds 0.5 mm) decreased it. The TD values also significantly increased to 2 and 4 mm in spring and autumn, respectively. These findings about the effects of sand burial on moss crust WR provide additional information that can be used to better understand the influence of sand burial on moss crust colonization and maintenance in arid sand-burial-stressed ecosystems, and to help explain why there are some contrasting viewpoints on biocrust WR.
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影响因子：
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作者：
Kidron, GJ;Yaalon, DH;Vonshak, A
通讯作者：
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影响因子：
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通讯作者：
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影响因子：
2.5
作者：
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影响因子：
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作者：
Yang Haotian;Liu Lichao;Li Xinrong;Wei Yongping;Li Xiaojun;Jia Rongliang
通讯作者：
Jia Rongliang
影响因子：
3.7
作者：
Bowker, Matthew A.;Maestre, Fernando T.;Mau, Rebecca L.
通讯作者：
Mau, Rebecca L.