A comparison of soil carbon dynamics in residential yards with and without trees

详细信息    查看全文

• 作者：Ann Huyler ; Arthur H. Chappelka ; Zhaofei Fan ; Stephen A. Prior
• 关键词：Lawns ; Aboveground tree biomass ; Belowground tree biomass ; soil carbon
• 刊名：Urban Ecosystems
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：20
• 期：1
• 页码：87-96
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Urban Ecology; Environmental Management; Ecology; Nature Conservation;
• 出版者：Springer US
• ISSN：1573-1642
• 卷排序：20

文摘

Residential lawns provide chronosequences to examine influences of home age and aboveground tree biomass (ATB) on soil carbon (C) levels. Soil C dynamics were compared between 44 lawns with trees (LwT) and 23 without trees (PL). At the 0–15 cm depth, LwT had higher mean soil C than PL and an earlier rise in median soil C across home age. Nonparametric quantile regression also showed a steeper rise in the 5th, 50th, and 95th soil C quantiles for LwT. Fitted polynomial regression models indicated that home age and ATB together accounted for 40 % of the soil C variation at the 0–15 cm depth [C = 1.34 + 0.05(Age) + 0.0003(ATB)]. At the 15–30 cm depth, the interaction between home age and ATB explained 33 % of the soil C variation [C = 0.78 + 0.0003(Age*ATB)]; at 30–50 cm, ATB was responsible for 20 % [C = 0.56 + 0.0003(ATB)].