Search

To develop the Chinese version of Clinical Outcomes in Routine Evaluation-Outcome Measure (CORE-OM) and examine its psychometric properties, we investigated a sample of 689 non-clinical and 309 clinical participants and found this measurement had good acceptability, internal reliability, test-retest reliability and convergent validity; it had moderate correlations with the Schwartz Outcome Scale and Symptom Check List-90, which showed an acceptable concurrent validity. Specifically, we explored the cut-off line of clinical criterion and found a g factor plus three-factor solution better than original four-domain model in Chinese context. The CORE-OM is a valid tool with referenced cut-offs to measure clinical outcomes, which can bridge the gap in routine clinical evaluation in China.

To test the hypothesis that American students have an advantage over East Asian students in arithmetical reasoning once computational abilities and IQ are controlled, 237 U.S. and 218 Chinese college students took arithmetical computational and reasoning tests, along with IQ and spatial abilities tests. Significant national differences favoring the Chinese students were found for all but the spatial test. After controlling for IQ and computational fluency, the Chinese advantage on the arithmetical reasoning tests was still significant but substantively smaller in magnitude. A similar pattern was observed for a sample of 55 U.S. and 80 Chinese high school students. The results, though not fully consistent with the hypothesis, are consistent with the position that the East Asian advantage in computational abilities contributes to the advantage in arithmetical reasoning.

Younger and older American and Chinese adults were administered arithmetic, perceptual speed, and spatial orientation tests. For the perceptual speed and spatial orientation tests, the younger adults showed substantial performance advantages over the older adults in both the United States and China. For the arithmetic tests, the younger Chinese adults outperformed the older Chinese adults, but the groups of younger and older American adults had comparable arithmetical abilities. Cross-national comparisons indicated that the younger Chinese adults outperformed the younger American adults on the arithmetic tests, but not on the perceptual speed and spatial orientation tests. The performance of the older American and older Chinese adults was comparable for all of the ability measures. The overall pattern suggests that the advantage of Chinese adults over American adults in complex arithmetic might be a relatively recent phenomenon.

To develop the Chinese version of Clinical Outcomes in Routine Evaluation-Outcome Measure (CORE-OM) and examine its psychometric properties, we investigated a sample of 689 non-clinical and 309 clinical participants and found this measurement had good acceptability, internal reliability, test-retest reliability and convergent validity; it had moderate correlations with the Schwartz Outcome Scale and Symptom Check List-90, which showed an acceptable concurrent validity. Specifically, we explored the cut-off line of clinical criterion and found a g factor plus three-factor solution better than original four-domain model in Chinese context. The CORE-OM is a valid tool with referenced cut-offs to measure clinical outcomes, which can bridge the gap in routine clinical evaluation in China. [ABSTRACT FROM AUTHOR]

Qinghai-Tibet Plateau wetland, an important component of terrestrial ecosystem, plays an essential role in global carbon cycling. To understand the variation of organic carbon storage in vegetation-soil system during vegetation degradation in the Gahai wetland we examined aboveground litter, root biomass and soil organic carbon content in different degradation stages (CK; no degradation, SD; light degradation, MD; moderate degradation, HD; heavy degradation). The results showed that except for HD, carbon storage of aboveground biomass was 99.58-205.64 g ⋅ m² and that of root biomass (0-40 cm) was 56.96-754.37 g ⋅ m². The carbon stocks of aboveground and roots decreased significantly with degradation. Soil bulk density increased first and then decreased with degradation. Soil bulk density of each layer under degraded wetland was greater than that of the control. The carbon storage of litter was 17.29-35.69 g ⋅ m², which was significantly higher in CK than in MD and HD. The carbon storage in the soil (0-40 cm) was 7265.06-9604.30 g ⋅ m², with the order of MD>CK>SD>HD. The carbon storage in CK and MD as significantly higher than that in SD and HD. The total carbon storage in the vegetation-soil system was 7265.06-10389.94 g ⋅ m² under different degradation stages. The largest was in CK, followed by MD, SD, and HD. Organic carbon was mostly stored in soil, which accounted for over 90% of the storage. Moderate interference might benefit carbon sequestration of the alpine wetland ecosystems. [ABSTRACT FROM AUTHOR]

Zhouqu County is located in the transition region from the Qinghai-Tibet Plateau to the Qinba Mountains, and is an important part of the ecological barrier in the upper stream of the Yangtze River. In this study, we used the Google Earth Engine cloud processing platform to perform inter-image optimal reconstruction of Landsat surface reflectance images from 1998-2019. We calculated four indicators of regional wet, green, dry, and hot. The component indicators were coupled by principal component analysis to construct remote sensing ecological index (RSEI) and to analyze the spatial and temporal variations of ecological environment quality in Zhouqu County. The results showed that the contribution of the four component indicators to the eigenvalues of the coupled RSEI were above 70%, with even distribution of the loadings, indicating that the RSEI integrated most of the features of the component indicators. From 1998 to 2019, the RSEI of Zhouqu County ranged from 0.55 to 0.63, showing an increasing trend with a growth rate of 0.04·(10 a) -1 , and the area of better grade increased by 425.56 km 2 . The area with altitude ≤2200 m was dominated by medium and lower ecological environment quality grade, while the area of better ecological environment quality grade area increased by 16.5%. The ecological and environmental quality of the region from 2200 to 3300 m was dominated by good grades, increasing to 71.3% in 2019, with the area of medium and below ecological and environmental quality grades decreasing year by year. The area with altitude ≥3300 m was dominated by the medium ecological quality grade. The medium and below ecological quality grades showed a "U" shape trend during the study period. The trend of ecological environment quality in Zhouqu County was becoming better, but with fluctuations. It is necessary to continuously strengthen the protection and management of ecological environment in order to guarantee the continuous improvement of ecological environment quality.

Variations of functional traits with leaf age reflect plant life history strategy and indicate allocation pattern and trade-off characteristics in the limiting resource. In this study, leaves with different ages of Taxus wallichiana var. chinensis saplings were taken as experimental materials. Fourteen leaf functional traits of leaves at three differebt ages were measured in order to reveal changes of the saplings' ecological strategies with leaf aging. The results showed that one-year-old leaves had significantly higher specific leaf area than two- and three-year-old lea-ves, while three-year-old leaves had significantly greater leaf thickness, leaf area, volume, fresh weight and dry weight than leaves at other ages. In addition, one-year-old leaves had significantly greater nitrogen content (N), phosphorus content (P) and N:P than two- and three-year-old leaves, but lower C:N than three-old-year leaves. The slope of allometric relationship between leaf water content and dry weight, leaf thickness and leaf area of one-year-old leaves, leaf thickness and leaf area of three-year-old leaves were all significantly lower than 1.0. Two-year-old leaves showed significantly allometric relationships between many leaf traits, with slope being not equal to 1.0. In conclusion, one-year-old leaves of T. wallichiana var . chinensis saplings tended to have higher photosynthetic capacity, two-year-old leaves had stronger dry matter accumulation, and three-year-old leaves would construct defense system. The coordination and complementation of functional traits among leaves with different ages might have great significance for maintaining individual homeostasis and survival.

Metabolisms are fundamental processes of organisms. They are related to carbon and water cycling of a plant. The relationship between the metabolic rate and the body size of an organism has been a hot spot in ecological research. The typical WBE model with 3/4 power has been controversial. This study tested the applicability of WBE model and examined the change of metabolic exponents with the age class at branch scale in a typical plant, Salix psammophila in the southern edge of the Mu Us desert. The results showed that the estimated metabolic exponent based on the leaf biomass and total biomass was 0.97 for all branches of the S. psammophila. This was significantly greater than the constant power of 3/4 proposed by the WBE model. The branching radius exponent and branching length exponent were 2.67 and 3.83, respectively, being significantly greater than the constant values of 2.0 and 3.0, respectively. The ranges of branching radius exponents and branching length exponents among the age classes were 2.64-3.24 and 2.86-4.30, respectively. Meanwhile, the estimated values and calculated values of metabolic exponents ranged from 1.01-1.29 and 0.94-1.13, respectively. The values of all above were statistically indistinguishable among the six age classes. The common slopes among the six age classes for estimated values and calculated values of metabolic exponents, branching radius exponents and branching length exponents were 1.08, 1.00, 2.84 and 3.35, respectively. These values were significantly greater than the constant values. The changes of the intercept at the y-axis shifted negatively at the common slope of estimated metabolic exponents with significant elevation shift between groups, and the higher age class branches had the greater shift. These indicated that the age classes did not change the metabolic exponents, but changed the metabolic constant significantly. The older branches had lower metabolic activity than the younger branches.

In arid and semi-arid areas, plant physiological responses to water availability depend largely on the intensity and frequency of rain events. Knowledge on the responses of xerophytic plants to rain events is important for predicting the structure and functioning of dryland ecosystems under changing climate. The sap flow of Hedysarum scoparium in the Mu Us Sand Land was continuously measured during the growing season of 2012 and 2013. The objectives were to quantify the dynamics of sap flow under different weather conditions, and to examine the responses of sap flow to rain events of different sizes. The results showed that the daily sap flow rates of H. scoparium were lower on rainy days than on clear days. On clear days, the sap flow of H. scoparium showed a midday plateau, and was positively correlated with solar radiation and relative humidity. On rainy days, the sap flow fluctuated at low levels, and was positively correlated with solar radiation and air temperature. Rain events not only affected the sap flow on rainy days through variations in climatic factors (e.g., solar radiation and air temperature), but also affected post-rainfall sap flow velocities though changes in soil moisture. Small rain events (<20 mm) did not change the sap flow, whereas large rain events (>20 mm) significantly increased the sap flow on days following rainfall. Rain-wetted soil conditions not only resulted in higher sap flow velocities, but also enhanced the sensitivity of sap flow to solar radiation, vapor pressure deficit and air temperature.