Responses of Organic Phosphorus Fractionation to Environmental Conditions and Lake Evolution.
Geochemical fractionation is used to assess the significance of environmental factors on organic phosphorus (OP) pools in sediments. Labile, moderately labile, and nonlabile OP pools in the sediments from Lake Hulun, Inner Mongolia, were fractionated, and their responses to environmental conditions and lake evolution were investigated based on the spatial and vertical distribution of OP fractionations. In light of the recalcitrant characteristics of organic matter (OM) in different environmental conditions, the pH presents significant negative effects on the amount of labile OP, while water depth shows an important role in regulating the distribution between the moderately labile and nonlabile OP pools. A latitudinal zonation in the distribution of OP pools in surface sediments from different lakes was apparent with this zonation likely linked to the gradient effects of climate and anthropogenic activities on OM decomposition and thereby on the sediments capacity to hold phosphorus. These results show that OM plays a role in governing the impacts of weather and environmental factors on OP fractionation in aquatic environments. This work suggests that OP pools in the sediment core could be used as an archive for environmental conditions and lake evolution.
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.|Institute of Environmental Geology, Inner Mongolia University , Huhhot 010021, China.|Department of Chemistry, University of Oslo , N-0315, Oslo, Norway.
Changwei
C
Lü
Forestry College, Inner Mongolia Agricultural University , Huhhot 010019, China.
Bing
B
Wang
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.|Institute of Environmental Geology, Inner Mongolia University , Huhhot 010021, China.
Jiang
J
He
Department of Chemistry, University of Oslo , N-0315, Oslo, Norway.
Rolf D
RD
Vogt
Department of Chemistry, University of Oslo , N-0315, Oslo, Norway.|Tianjin Academy of Environmental Sciences , Tianjin, 300191, China.
Bin
B
Zhou
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.
Rui
R
Guan
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.
Le
L
Zuo
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.
Weiying
W
Wang
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.
Zhilei
Z
Xie
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.
Jinghua
J
Wang
College of Environment and Resources, Inner Mongolia University , Huhhot 010021, China.
Daohao
D
Yan
D005591:Chemical Fractionation; D019015:Geologic Sediments / Q000737:chemistry; D060106:Lakes / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D014874:Water Pollutants, Chemical
D014874:Water Pollutants, Chemical; D010758:Phosphorus