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

作者：Huyler Ann^*; Chappelka Arthur H; Fan Zhaofei; Prior Stephen A

来源：Urban Ecosystems, 2017, 20(1): 87-96.

DOI：10.1007/s11252-016-0572-y

• Lawns
• Aboveground tree biomass
• Belowground tree biomass, soil carbon

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)].

• 出版日期2017-2