Disentangling effects of air and soil temperature on C allocation in cold environments: A ¹⁴C pulse-labelling study with two plant species.

ABSTRACT: Carbon cycling responses of ecosystems to global warming will likely be stronger in cold ecosystems where many processes are temperature-limited. Predicting these effects is difficult because air and soil temperatures will not change in concert, and will affect above and belowground processes differently. We disentangled above and belowground temperature effects on plant C allocation and deposition of plant C in soils by independently manipulating air and soil temperatures in microcosms planted with either Leucanthemopsis alpina or Pinus mugo seedlings. Daily average temperatures of 4 or 9°C were applied to shoots and independently to roots, and plants pulse-labelled with ¹⁴ CO ₂. We traced soil CO ₂ and ¹⁴ CO ₂ evolution

SUBMITTER: Ferrari A 

PROVIDER: S-EPMC6144959 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature