Inoculation and habitat amelioration efforts in biological soil crust recovery vary by desert and soil texture
Inoculation and habitat amelioration efforts in biological soil crust recovery vary by desert and soil texture
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DOI：
10.1111/rec.13087
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发表时间：
2020-01-08
影响因子：
3.2
通讯作者：
Barger, Nichole N.
中科院分区：
文献类型：
--
作者：
Faist, Akasha M.;Antoninka, Anita J.;Barger, Nichole N.
随着旱地退化的继续，了解如何有效地恢复生物群落变得越来越重要。潜在的技术包括添加生物尘埃接种剂以加速生物尘埃的恢复。退化环境的典型特征是侵蚀加剧，这给这些方法带来了挑战，因为风或水造成的损失，以及跳跃颗粒的掩埋。为了保留和保护添加的接种物，包括栖息地改善技术可以提高回收率。这项研究测试了三种不同类型的接种物(田间采集的、温室栽培的和实验室栽培的生物渣土)，并结合两种处理来增强土壤稳定性和改善栖息地限制：添加土壤表面聚丙烯酰胺和安装秸秆屏障。这项研究是在两个沙漠(大盆地和吉娃娃)上进行的，并将每个沙漠中的土壤分成一般粗糙或质地较细的土壤，结果监测了3年(2015、2016、2017年)。虽然接种类型，加上栖息地的改善，偶尔会促进多年来的生物生长和处理，但在其他情况下，与自然恢复率相比没有什么不同。相反，沙漠位置和土壤质地分类是决定恢复轨迹的最显著因素。在大盆地和奇瓦瓦沙漠中，质地较细的遗址的恢复比例相似，而大盆地中质地较粗的遗址随着时间的推移确实显示出一些恢复，而吉娃娃质地较粗的遗址则没有。这项研究证明了了解场地潜力和确定生物灰烬恢复的关键限制对于成功的修复项目的重要性。
As dryland degradation continues, it is increasingly important to understand how to effectively restore biocrust communities. Potential techniques include the addition of biocrust inoculum to accelerate biocrust recovery. Enhanced erosion typical of degraded environments creates a challenge for these approaches, due to loss by wind or water and burial by saltating particles. To retain and protect added inoculum, the inclusion of habitat-amelioration techniques can improve recovery rates. This study tested three different types of inoculum (field-collected, greenhouse-cultivated, and laboratory-cultivated biocrust) coupled with two treatments to augment soil stability and ameliorate habitat limitations: soil surface polyacrylamide additions and installation of straw barriers. This was done across two deserts (Great Basin and Chihuahuan) and separated into generally coarse- or finer-textured soils in each desert, with results monitored for 3 years (2015, 2016, 2017). While the inoculum type, coupled with habitat ameliorations, occasionally enhanced biocrust growth across years and treatments, in other cases, it made no difference compared to natural recovery rates. Rather, the desert location and soil texture groupings were the most prominent factors in determining recovery trajectories. Recovery proportions were similar in the finer-textured sites in both the Great Basin and the Chihuahuan deserts, while the coarser-textured site in the Great Basin did show some recovery over time and the Chihuahuan coarser-textured site did not. This study demonstrates the importance of understanding site potential and identifying key limitations to biocrust recovery for successful restoration projects.