Ecosystem responses to climate change,particularly in arid environments,is an understudied topic.This study conducted a spatial analysis of ecosystem responses to short-term variability in temperature,precipitation,an...Ecosystem responses to climate change,particularly in arid environments,is an understudied topic.This study conducted a spatial analysis of ecosystem responses to short-term variability in temperature,precipitation,and solar radiation in the Qilian Mountains National Park,an arid mountainous region in Northwest China.We collected precipitation and temperature data from the National Science and Technology Infrastructure Platform,solar radiation data from the China Meteorological Forcing Dataset,and vegetation cover remote-sensing data from the Moderate Resolution Imaging Spectroradiometer.We used the vegetation sensitivity index to identify areas sensitive to climate change and to determine which climatic factors were significant in this regard.The findings revealed a high degree of heterogeneity and non-linearity of ecosystem responses to climate change.Four types of heterogeneity were identified:longitude,altitude,ecosystem,and climate disturbance.Furthermore,the characteristics of nonlinear ecosystem responses to climate change included:(1)inconsistency in the controlling climatic factors for the same ecosystems in different geographical settings;(2)the interaction between different climatic factors results in varying weights that affect ecosystem stability and makes them difficult to determine;and(3)the hysteresis effect of vegetation increases the uncertainty of ecosystem responses to climate change.The findings are significant because they highlight the complexity of ecosystem responses to climate change.Furthermore,the identification of areas that are particularly sensitive to climate change and the influencing factors has important implications for predicting and managing the impacts of climate change on ecosystems,which can help protect the stability of ecosystems in the Qilian Mountains National Park.展开更多
Water conservation is one of the most important ecosystem functions.This study uses the InVEST model to examine the water conservation function of the Qilian Mountain National Park(QMNP),an important water supply area...Water conservation is one of the most important ecosystem functions.This study uses the InVEST model to examine the water conservation function of the Qilian Mountain National Park(QMNP),an important water supply area in northwest China.We analyzed the spatiotemporal water conservation patterns of QMNP from 1988 to 2019.It showed that the water conservation capacity in QMNP has increased over the past 32 years,reaching a peak of 6.495×108 m3 in 2019.The area with an increased water conservation capacity is 12 times larger than the area with a reduced capacity.We also examined how climatic,land-use,vegetation coverage,and topographical factors influence water conservation functions.We found that precipitation is the main climatic factor in water conservation.The water conservation function also varies with land-cover type,with forests having the highest capacity,followed by grasslands.Lastly,topographical factors,including altitude and slope,also shape the spatial patterns of water conservation functions in QMNP.展开更多
Objective:To investigate the correlation between serum secretory frizzled-related protein 5(SFRP-5)expression levels and insulin resistance and glucolipid metabolism in patients with gestational diabetes mellitus(GDM)...Objective:To investigate the correlation between serum secretory frizzled-related protein 5(SFRP-5)expression levels and insulin resistance and glucolipid metabolism in patients with gestational diabetes mellitus(GDM).Methods:Baseline data were collected from 58 patients with GDM and 51 healthy controls who were admitted Affiliated Hospital of Hebei University from May 2020 to June 2022.sSTRA5 concentrations in peripheral blood of pregnant women were measured,and SFRP-5 levels in patients with different GDM types and normal controls were analyzed by logistic regression models.Results:The levels of triglyceride(TG),total cholesterol(TC),low-density lipoprotein cholesterol(LDL-C),fasting blood glucose(FBG),fasting insulin(FINS),hemoglobin A1c(HbA1c),and homeostasis model assessment-estimated insulin resistance(HOMA-IR)were higher in the observation group than in the control group,with statistically significant differences(P<0.05),while the expression levels of high-density lipoprotein cholesterol(HDL-C)and serum SFRP-5 were lower than in the control group,with statistically significant differences(P<0.05);serum SFRP-5,TG,TC,FBG,and HOMA-IR were all risk factors for GDM(P<0.05).Conclusion:Elevated serum sSTRA5 may be involved in the regulation of insulin resistance in the body and the regulation of blood glucose in the body by affecting lipid metabolism and inflammatory response.展开更多
Objective:To understand the vitamin levels in pregnant women and its influencing factors and provide a basis for formulating scientific and reasonable vitamin supplement plans for pregnant women.Methods:Pregnant women...Objective:To understand the vitamin levels in pregnant women and its influencing factors and provide a basis for formulating scientific and reasonable vitamin supplement plans for pregnant women.Methods:Pregnant women with a pregnancy period of 12 weeks to 36 weeks in Baoding area were selected as the research subjects using the random sampling method.The sample size is estimated to be 5,000 people,and the diversity of the research subjects,such as age,education level,pregnancy,etc.,were recorded through a survey.The content of the survey included the personal information of the research subjects,pregnancy conditions,eating habits,vitamin supplements taken,etc.At the same time,blood tests were carried out on the research subjects to detect indicators such as vitamin levels.Results:The results of serum measurement showed that the vitamin A level of pregnant women was 0.38±0.12 mg/L,the vitamin E level was 13.51±3.17 mg/L,and the vitamin D level was 17.82±4.18 ng/L;the level of vitamin A of pregnant women in the first trimester was significantly lower than those in the second and third trimesters,and the level of vitamin E of pregnant women in second trimester was significantly higher than those in the first and third trimesters,with statistically significant differences(P<0.05).The rate of vitamin A deficiency in the early stage was significantly higher than that in the middle and late stages of pregnancy,(P<0.05);vitamin D deficiency existed in all pregnant women.Conclusion:Pregnant women should maintain a reasonable diet and eat more vitamin-rich foods,such as vegetables,fruits,etc.;besides,pregnant women should take vitamin supplements under the guidance of doctors or professionals according to their own conditions;moreover,the publicity and education for pregnant women should be improved with more emphasis on vitamin supplementation.展开更多
基金supported by the National Key Research and Development Program of China (2019YFC0507402)
文摘Ecosystem responses to climate change,particularly in arid environments,is an understudied topic.This study conducted a spatial analysis of ecosystem responses to short-term variability in temperature,precipitation,and solar radiation in the Qilian Mountains National Park,an arid mountainous region in Northwest China.We collected precipitation and temperature data from the National Science and Technology Infrastructure Platform,solar radiation data from the China Meteorological Forcing Dataset,and vegetation cover remote-sensing data from the Moderate Resolution Imaging Spectroradiometer.We used the vegetation sensitivity index to identify areas sensitive to climate change and to determine which climatic factors were significant in this regard.The findings revealed a high degree of heterogeneity and non-linearity of ecosystem responses to climate change.Four types of heterogeneity were identified:longitude,altitude,ecosystem,and climate disturbance.Furthermore,the characteristics of nonlinear ecosystem responses to climate change included:(1)inconsistency in the controlling climatic factors for the same ecosystems in different geographical settings;(2)the interaction between different climatic factors results in varying weights that affect ecosystem stability and makes them difficult to determine;and(3)the hysteresis effect of vegetation increases the uncertainty of ecosystem responses to climate change.The findings are significant because they highlight the complexity of ecosystem responses to climate change.Furthermore,the identification of areas that are particularly sensitive to climate change and the influencing factors has important implications for predicting and managing the impacts of climate change on ecosystems,which can help protect the stability of ecosystems in the Qilian Mountains National Park.
基金supported by the National Key Research and Development Program(2019YFC0507402)。
文摘Water conservation is one of the most important ecosystem functions.This study uses the InVEST model to examine the water conservation function of the Qilian Mountain National Park(QMNP),an important water supply area in northwest China.We analyzed the spatiotemporal water conservation patterns of QMNP from 1988 to 2019.It showed that the water conservation capacity in QMNP has increased over the past 32 years,reaching a peak of 6.495×108 m3 in 2019.The area with an increased water conservation capacity is 12 times larger than the area with a reduced capacity.We also examined how climatic,land-use,vegetation coverage,and topographical factors influence water conservation functions.We found that precipitation is the main climatic factor in water conservation.The water conservation function also varies with land-cover type,with forests having the highest capacity,followed by grasslands.Lastly,topographical factors,including altitude and slope,also shape the spatial patterns of water conservation functions in QMNP.
基金Youth Science and Technology Fund of Affiliated Hospital of Hebei University(Project number:2017Q024)Baoding City Science and Technology Plan Projects(Project number:2041ZF295)Hebei University Medical Subject Cultivation Project(Project number:2022B03)。
文摘Objective:To investigate the correlation between serum secretory frizzled-related protein 5(SFRP-5)expression levels and insulin resistance and glucolipid metabolism in patients with gestational diabetes mellitus(GDM).Methods:Baseline data were collected from 58 patients with GDM and 51 healthy controls who were admitted Affiliated Hospital of Hebei University from May 2020 to June 2022.sSTRA5 concentrations in peripheral blood of pregnant women were measured,and SFRP-5 levels in patients with different GDM types and normal controls were analyzed by logistic regression models.Results:The levels of triglyceride(TG),total cholesterol(TC),low-density lipoprotein cholesterol(LDL-C),fasting blood glucose(FBG),fasting insulin(FINS),hemoglobin A1c(HbA1c),and homeostasis model assessment-estimated insulin resistance(HOMA-IR)were higher in the observation group than in the control group,with statistically significant differences(P<0.05),while the expression levels of high-density lipoprotein cholesterol(HDL-C)and serum SFRP-5 were lower than in the control group,with statistically significant differences(P<0.05);serum SFRP-5,TG,TC,FBG,and HOMA-IR were all risk factors for GDM(P<0.05).Conclusion:Elevated serum sSTRA5 may be involved in the regulation of insulin resistance in the body and the regulation of blood glucose in the body by affecting lipid metabolism and inflammatory response.
基金Medical Science Research Project of Hebei Provincial Health and Health Commission,Epidemiological Investigation of Vitamin A,D,and E Levels of Pregnant Women in Baoding Area(Fund number:20190947)。
文摘Objective:To understand the vitamin levels in pregnant women and its influencing factors and provide a basis for formulating scientific and reasonable vitamin supplement plans for pregnant women.Methods:Pregnant women with a pregnancy period of 12 weeks to 36 weeks in Baoding area were selected as the research subjects using the random sampling method.The sample size is estimated to be 5,000 people,and the diversity of the research subjects,such as age,education level,pregnancy,etc.,were recorded through a survey.The content of the survey included the personal information of the research subjects,pregnancy conditions,eating habits,vitamin supplements taken,etc.At the same time,blood tests were carried out on the research subjects to detect indicators such as vitamin levels.Results:The results of serum measurement showed that the vitamin A level of pregnant women was 0.38±0.12 mg/L,the vitamin E level was 13.51±3.17 mg/L,and the vitamin D level was 17.82±4.18 ng/L;the level of vitamin A of pregnant women in the first trimester was significantly lower than those in the second and third trimesters,and the level of vitamin E of pregnant women in second trimester was significantly higher than those in the first and third trimesters,with statistically significant differences(P<0.05).The rate of vitamin A deficiency in the early stage was significantly higher than that in the middle and late stages of pregnancy,(P<0.05);vitamin D deficiency existed in all pregnant women.Conclusion:Pregnant women should maintain a reasonable diet and eat more vitamin-rich foods,such as vegetables,fruits,etc.;besides,pregnant women should take vitamin supplements under the guidance of doctors or professionals according to their own conditions;moreover,the publicity and education for pregnant women should be improved with more emphasis on vitamin supplementation.
