10.5061/DRYAD.3FFBG79FK
Wang, Jing
0000-0003-4361-7281
Hebei University
Zhang, Qian
Henan University
Song, Jian
Hebei University
Ru, Jingyi
Henan University
Zhou, Zhenxing
Henan University
Xia, jianyang
East China Normal University
Dukes, Jeffrey
Purdue University
Wan, Shiqiang
Hebei University
Data from: Nighttime warming enhances ecosystem carbon-use efficiency in a
temperate steppe
Dryad
dataset
2020
CUE
asymmetric warming
Carbon use efficiency
nighttime warming
diurnal temperature fluctuations
2020-04-29T00:00:00Z
2020-04-29T00:00:00Z
en
39971 bytes
2
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Reductions in the diurnal temperature range (DTR), e.g., greater
increases in daily minimum than maximum temperatures, have occurred for
several decades and are projected to continue over this century, which
could affect terrestrial carbon (C) cycling. Carbon-use efficiency of
plants (CUEp) and ecosystems (CUEe) represents the capacity of plants to
capture C and ecosystems to store C fixed from the atmosphere,
respectively. Few studies have examined how grassland CUE responds to
asymmetric warming. 2. As part of a long-term (2006-2016) field experiment
that simulated daytime and nighttime warming in a semiarid temperate
steppe on the Mongolian Plateau, this study was conducted to examine the
effects of daytime and nighttime warming on CUEp and CUEe. 3. Nighttime
warming, unlike daytime warming, increased CUEe by 54.2%, whereas neither
nighttime nor daytime warming affected CUEp. Ecosystem-level CUE linearly
increased with soil moisture but declined with soil temperature variation
(CVST). The suppressed ER, which might have been driven by the reduced
CVST, primarily contributed to the higher CUEe under nighttime warming. 4.
These observations indicate that a reduced DTR, associated with a warmer
night under asymmetric diurnal climate warming, could increase the
capacity of the temperate steppe transferring C into ecosystems by
elevating CUEe, resulting more C sequestration.