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1

Effect of predator-induced maternal stress during gestation on growth in root voles Microtus oeconomus

100%
Bian J., Wu Y., Liu J.
Acta Theriologica
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2005
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tom 50
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nr 4
473-482
We studied the effect of maternal stress evoked by a severe stressor from the cues of predation risk during gestation on the growth of offspring in root volesMicrotus oeconomus Pallas, 1776. Body mass of both male and female offspring was significantly reduced in the period from birth to weaning. Females showed compensatory growth after weaning, whereas males maintained low body mass at weaning into adulthood. Maternal stress led to an elevated plasma corticosterone level in male offspring, but did not affect that of female offspring. Corticosterone levels remained elevated in males from stressed dams into adulthood. Increased levels of plasma corticosterone may have led to the inhibition of pituitary growth hormone and a chronically abnormal energy mobilization, considering the greater energy and metabolic requirements of male offspring, this may account for the sex-specific differences in compensatory growth. We suggest that in the high stress situation, endocrine-based sex-biased effects of maternal stress as a primary factor can lead to long-term physical and ecological consequences for male offspring.
2

Estimating the spatial distribution of soil salinity with geographically weighted regression Kriging and Its relationship to groundwater in the Western Jilin irrigation area, Northeast China

100%
Nie S., Bian J., Zhou Y.
Polish Journal of Environmental Studies
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2021
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tom 30
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nr 1
3

Evaluating SWAT snowmelt parameters and simulating spring snowmelt nonpoint source pollution in the source area of the Liao River

88%
Wang Y., Bian J., Wang S., Tang J., Ding F.
Polish Journal of Environmental Studies
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2016
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tom 25
|
nr 5
Snowmelt hydrology becomes an important component of the soil and water assessment tool (SWAT) when spring flows are dominated by melting snow. The objective of this study was to evaluate the performance of the SWAT model’s snowmelt parameters by simulating nonpoint source pollution in the source area of the Liao River – a cold area in China. The seven snowmelt parameters for the simulation were adjusted. The exports rule of nonpoint source pollution for the spring snowmelt period was analyzed. The result show that SFTMP, SMTMP, SMFMX, SMFMN, and TIMP were sensitive parameters, while SNOCOVMX and SNO50COV were insensitive. In addition, two common statistics (Nash-Sutcliffe coefficient, and coefficient of determination) were used to evaluate the model. This evaluation indicated that the SWAT model had good performance simulating the seasonal nonpoint source pollution with large snowmelt. According to the analysis, rainfall and snowmelt is a main driver of nonpoint source pollution in the cold area, and that summer and spring are high-risk seasons. The study provides a new and suitable method of nonpoint source pollution simulation for the cold areas.
4

Hydro-geochemical characteristics and health risk evaluation of nitrate in groundwater

88%
Bian J., Liu C., Zhang Z., Wang R., Gao Y.
Polish Journal of Environmental Studies
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2016
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tom 25
|
nr 2
Groundwater is considered a major source of drinking water and its quality a basis for good population health. In order to identify groundwater hydro-chemical characteristics and pollution conditions in Songnen Plain, groundwater hydro-chemical characteristics and nitrate-nitrogen (NO3-N) spatial distribution characteristics and the health risks were analyzed. Results showed that groundwater hydro-chemical type was mainly HCO3-Ca, which was associated with the action of calcite and silicate mineral weathering dissolution. The over standards rate of NO3-N accounted for 50.8%, the coeffi cient of variation was 183.57% which was high spatial variability, the high-risk area accounted for 88.78% of the total study area, and the high-risk area covered the area with water quality of classes IV, V, and part of class III. The high-risk area is mainly distributed in the eastern high plains and in the central low plains, while the low-risk zone accounts for only 11.22% of the total area and is mainly distributed in the western alluvial plain with scattered distribution in other areas.
5

Hydrochemistry characteristics and water quality assessment for irrigation along the Second Songhua River in the south of the Songnen Plain, northeast China

76%
Sun X., Bian J., Zhang C., Wang Y., Wan H., Jia Z.
Polish Journal of Environmental Studies
|
2020
|
tom 29
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nr 1
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