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Qin X.,Tianjin Natural History Museum | Sun N.,Harbin University | Ma L.,Harbin University | Chang Y.,Harbin University | Mu L.,Harbin University
Environmental Science and Pollution Research | Year: 2014

In order to examine whether the leaves of the Colorado blue spruce (Picea pungens) are damaged or not by traffic pollution, the traits of the anatomy and physiology of its leaves are investigated by exposure to vehicle exhausts in a laboratory experiment lasting 30 days. The results show that both the anatomical structures and physiological traits of the leaves are significantly affected by vehicle exhausts. The anatomical structures, including epidermis, cuticle, palisade, and spongy parenchyma are modified when exposed to the high concentrations (≥0.4 mg/m3) of vehicle exhausts. However, physiological traits such as total chlorophyll content are not changed when exposed to different concentrations of vehicle exhaust. Unlike the total chlorophyll content, the electrical conductivities increased, whereas the POD activities decreased when presented in vehicle exhausts. The present study indicates that the Colorado blue spruce changes its anatomical structures and physiological traits to avoid possible damage by vehicle exhausts. © 2014, Springer-Verlag Berlin Heidelberg. Source

Wu A.,Zhoukou Normal University | Guo N.,Zhoukou Normal University | Qin X.,Tianjin Natural History Museum
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2015

Anbanghe wetland is a typical swamp in the cold region. In this study, the concept of functional group was firstly applied to study seasonal variation of phytoplankton community of Anbanghe Wetland. The distribution of phytoplankton functional groups and their relationship with environmental factors were investigated by multivariate analysis techniques. A total of 104 taxa were recorded. There were 14 functional groups, including C, D, E, F, H1, J, Lo, M, MP, N, P, SN, X1 and Y, found during the study periods. Groups C, D, E, J, Lo, N, P and Y were the dominant group. The phytoplankton functional groups exhibited a noticeably seasonal variation. Group E and Lo were predominant in the spring associated with low water temperature (WT) and nutrients availability. Group D, J and P were associated with high WT, nutrients availability and turbidity in the summer. Group J and P were associated with high WT and nutrients availability in the autumn. The redundancy analysis (RDA) showed that WT, dissolved inorganic nitrogen (DIN), and soluble reactive phosphorus (SRP) were the key environmental factors which impacted the seasonal variation of phytoplankton functional groups in Anbanghe Wetland. ©, 2015, Science Press. All right reserved. Source

Qin X.,Tianjin Natural History Museum | Zeng Z.,Beijing Museum of Natural History
Acta Theriologica Sinica | Year: 2011

Relationships between environmental factors and the rodent community sampled by a trap-day method was studied by redundancy analysis (RDA) in different habitats of Sino-Singapore Tianjin Eco-city from June to August 2008. Relatively high population densities of rodents (ind/100 traps/ha) were found in the village area (8.33), the Ji canal side (8. 00), the highway (7.00) and the bulrush area (6.00). Low population densities were found in the alkali area (1. 00), the estuary (1.00), and the salt pond (0.66). The highest diversity index was found in the village area (1.97) and the highway (1.68), following by the bulrush area (1.40) and the Ji canal side (1.18), the lowest were the salt pond (1.00), the alkali area (0.92), and the estuary (0.92). There were differences in community structures of rodents among the 7 habitats based on the similarity indices, indicating that the structures of rodent communities were affected by environmental factors. RDA with forward selection showed that variation of rodent communities was significantly related to water salinity (F=6.30, P=0.016) and plant coverage (F=4.6, P=0.026), suggesting that these two environmental factors are the most important environmental factors defining the structure of rodent communities in Sino-Singapore Tianjin Eco-city during summer. Source

Chi Y.,State Oceanic Administration | Shi H.,State Oceanic Administration | Wang X.,Tianjin University of Technology | Qin X.,Tianjin Natural History Museum | And 2 more authors.
Chinese Journal of Oceanology and Limnology | Year: 2016

Herbaceous plants are widely distributed on islands and where they exhibit spatial heterogeneity. Accurately identifying the impact factors that drive spatial heterogeneity can reveal typical island biodiversity patterns. Five southern islands in the Miaodao Archipelago, North China were studied herein. The spatial distribution of herbaceous plant diversity on these islands was analyzed, and the impact factors and their degree of impact on spatial heterogeneity were identified using CCA ordination and ANOVA. The results reveal 114 herbaceous plant species, belonging to 94 genera from 34 families in the 50 plots sampled. The total species numbers on different islands were significantly positively correlated with island area, and the average α diversity was correlated with human activities, while the β diversity among islands was more affected by island area than mutual distances. Spatial heterogeneity within islands indicated that the diversities were generally high in areas with higher altitude, slope, total nitrogen, total carbon, and canopy density, and lower moisture content, pH, total phosphorus, total potassium, and aspect. Among the environmental factors, pH, canopy density, total K, total P, moisture content, altitude, and slope had significant gross effects, but only canopy density exhibited a significant net effect. Terrain affected diversity by restricting plantation, plantation in turn influenced soil properties and the two together affected diversity. Therefore, plantation was ultimately the fundamental driving factor for spatial heterogeneity in herbaceous plant diversity on the five islands. © 2016, Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag Berlin Heidelberg. Source

Qin X.,Tianjin Natural History Museum
Hystrix | Year: 2011

For many animals, bed-site selection is influenced by anti-predator strategies, as they are forced to cope with high risk of predation. I examined summer bed-site selection by roe deer (Capreolus capreolus bedfordi) in an area - Baxianshan Nature Reserve, north China -, where predators were extirpated 22 years before, predicting that roe deer would select the bed-sites which allowed them to maximize fawn survival, independently from predation risk. Among three available forest types, roe deer showed a strong preference for deciduous forests. Roe deer bedded at sites with higher elevation, denser shrub, higher herb biomass and cover and higher percentage of new shoots to the total twigs compared to negative sites. They selected bed-sites relatively far from trees, shrubs, and human features. Furthermore, roe deer avoided areas with tall shrubs and steep slopes. Principal component analysis (PCA) revealed that food availability, visibility, space, and human disturbance were the most important factors affecting bed-site selection by roe deer. Bed-site selection by roe deer was still the result of anti-predator strategies. This implies that two decades were a too short period to let deer lose the memory of predation pressure. This study suggests that the nonrandom bed-site selection of roe deer aimed to increase reproductive success by enhancing fawn survival. Source

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