The effects of soil drying on the growth of a dominant peatland species, Carex lasiocarpa
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The effects of soil drying on the growth of a dominant peatland species, Carex lasiocarpa. / Yuan, Jihong; Wang, Ping; Weiner, Jacob; Bian, Hongfeng; Tang, Zhanhui; Sheng, Lianxi.
I: Wetlands, Bind 37, Nr. 6, 2017, s. 1135-1143.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - The effects of soil drying on the growth of a dominant peatland species, Carex lasiocarpa
AU - Yuan, Jihong
AU - Wang, Ping
AU - Weiner, Jacob
AU - Bian, Hongfeng
AU - Tang, Zhanhui
AU - Sheng, Lianxi
PY - 2017
Y1 - 2017
N2 - The drying of wetlands due to natural and anthropogenic factors has become a serious problem globally. Understanding the tolerance of the dominant hygrophytic plants to drought would help in establishing effective management for the maintenance, protection and restoration of wetlands. We conducted a greenhouse experiment to explore the effect of soil drought on the growth of Carex lasiocarpa, a dominant species in peatlands in northeastern China. Three different drought treatments were included. The soil water contents were measured. Results showed that there was little impact of shorter drying treatment on the morphological and physiological characteristics of C. lasiocarpa, but significant impact of longer drying treatment on it. The negative effects of longer drying treatment on belowground growth were much higher than aboveground. Drying not only decreased the biomass but also changed the resource allocation, decreasing the root:shoot ratio. The rhizome length of C. lasiocarpa significantly decreased, and the tiller number also showed a decreasing trend. Our results suggest that this species could resist soil drying. But continuous soil drying would reduce carbon accumulation and increase carbon allocation aboveground, which would result in a decline in carbon storage in C. lasiocarpa peatlands.
AB - The drying of wetlands due to natural and anthropogenic factors has become a serious problem globally. Understanding the tolerance of the dominant hygrophytic plants to drought would help in establishing effective management for the maintenance, protection and restoration of wetlands. We conducted a greenhouse experiment to explore the effect of soil drought on the growth of Carex lasiocarpa, a dominant species in peatlands in northeastern China. Three different drought treatments were included. The soil water contents were measured. Results showed that there was little impact of shorter drying treatment on the morphological and physiological characteristics of C. lasiocarpa, but significant impact of longer drying treatment on it. The negative effects of longer drying treatment on belowground growth were much higher than aboveground. Drying not only decreased the biomass but also changed the resource allocation, decreasing the root:shoot ratio. The rhizome length of C. lasiocarpa significantly decreased, and the tiller number also showed a decreasing trend. Our results suggest that this species could resist soil drying. But continuous soil drying would reduce carbon accumulation and increase carbon allocation aboveground, which would result in a decline in carbon storage in C. lasiocarpa peatlands.
KW - Biomass allocation
KW - Root length
KW - Specific leaf area
KW - Wetland degradation
U2 - 10.1007/s13157-017-0946-9
DO - 10.1007/s13157-017-0946-9
M3 - Journal article
AN - SCOPUS:85028778139
VL - 37
SP - 1135
EP - 1143
JO - Wetlands
JF - Wetlands
SN - 0277-5212
IS - 6
ER -
ID: 189461513