Biological soil crusts influence carbon release responses following rainfall in a temperate desert, northern China
Biological soil crusts influence carbon release responses following rainfall in a temperate desert, northern China
复制标题
生物土壤结皮影响中国北部温带沙漠降雨后的碳释放响应
DOI：
10.1007/s11284-014-1177-7
复制
发表时间：
2014-07
影响因子：
2
通讯作者：
Chen Yongle
中科院分区：
文献类型：
--
作者：
Li xinrong;Zhang Zhishan;Hu Yigang;Chen Yongle
土壤复盖类型和降雨模式如何影响温带沙漠生态系统的碳(C)释放在很大程度上尚未被探索。我们从沙坡头地区移除了10厘米以下的完整结壳，中国，并在降雨后立即在PVC中测量了它们。测定了4种覆盖类型(苔藓-结皮、藻类-结皮、苔藓、藻类和地衣)-结皮和流动沙丘土中碳的释放速率。在自然条件下，我们调查了7种不同的降雨量(0-1，1-2，2-5，5-10，10-15，15-20，和20 mm)。C的释放量随降雨量的增加而增加。随着降雨量从0增加到45 mm，苔藓结皮土壤的碳释放量从0.13±0.09增加到15.2±1.35，藻类结皮土壤的碳释放量从0.08±0.06增加到6.43±1.23，混合结皮土壤的碳释放量从0.11±0.08增加到8.01±0.51，流动沙地的碳释放量从0.06±0.04增加到8.47±0.51。在暴雨发生(44.9 mm)后，苔藓结皮土壤的碳释放速率显著高于藻类和混合结皮土壤和流动沙地，分别为0.95g/μ、0.30g±0.03、0.13g±0.04和0.51g/−·2s−-1。降雨模式的变化，特别是大雨脉冲(>；10 mm)影响不同土壤覆盖类型对碳释放量的贡献；在短期极端降雨事件后，苔藓结皮土壤比其他生物结皮土壤维持更高的呼吸速率。
How soil cover types and rainfall patterns influence carbon (C) release in temperate desert ecosystems has largely been unexplored. We removed intact crusts down to 10 cm from the Shapotou region, China, and measured them in PVC mesocosms, immediately after rainfall. C release rates were measured in soils with four cover types (moss-crusted soil, algae-crusted soil, mixed (composed of moss, algae, and lichen)-crusted soil, and mobile dune sand). We investigated seven different rainfall magnitudes (0–1, 1–2, 2–5, 5–10, 10–15, 15–20, and >20 mm) under natural conditions. C release from all four BSCs increased with increasing rainfall amount. With a rainfall increase from 0 to 45 mm, carbon release amounts increased from 0.13 ± 0.09 to 15.2 ± 1.35 gC m−2in moss-crusted soil, 0.08 ± 0.06 to 6.43 ± 1.23 gC m−2in algae-crusted soil, 0.11 ± 0.08 to 8.01 ± 0.51 gC m−2in mixed-crusted soil, and 0.06 ± 0.04 to 8.47 ± 0.51 gC m−2in mobile dune sand, respectively. Immediately following heavy rainfall events (44.9 mm), moss-crusted soils showed significantly higher carbon release rates than algae- and mixed-crusted soils and mobile dune sands, which were 0.95 ± 0.02, 0.30 ± 0.03, 0.13 ± 0.04, and 0.51 ± 0.02 μmol CO2m−2s−1, respectively. Changes in rainfall patterns, especially large rain pulses (>10 mm) affect the contributions of different soil cover types to carbon release amounts; moss-crusted soils sustain higher respiration rates than other biological crusts after short-term extreme rainfall events.
登录
查看更多内容
影响因子：
6.4
作者：
Chamizo, Sonia;Canton, Yolanda;Domingo, Francisco
通讯作者：
Domingo, Francisco
影响因子：
--
作者：
Kidron, GJ;Yaalon, DH;Vonshak, A
通讯作者：
Vonshak, A
影响因子：
9.7
作者：
Miralles, Isabel;Trasar-Cepeda, Carmen;Gil-Sotres, Fernando
通讯作者：
Gil-Sotres, Fernando
影响因子：
4.8
作者：
A. Thomas;S. Hoon;P. Linton
通讯作者：
A. Thomas;S. Hoon;P. Linton
区域气候预测
DOI：
10.1007/978-3-319-68418-5_10
发表时间：
2018
期刊：
Journal of chromatography
影响因子：
--
作者：
R. Vautard
通讯作者：
R. Vautard