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The debate on species coexistence mechanisms never stops. The niche theory, neutral theory, and negative density dependence mechanism has been attracting considerable attention in recent years, but an integrated research on species coexistence mechanisms has rarely been conducted. In this study, a previous investigation at a plot in Henan Province was used as a basis to analyze the spatial structure...
Anthropogenic and agricultural activities are deteriorating drinking water quality of the Siling reservoir. Spatio-temporal variations and risk assessment of select heavy metals (Zn, Cu, Mn, Fe, Cr, Cd, and Pb) were investigated in water samples. During summer Mn (37.32 μg/L), Fe (41.0 μg/L), and Cd (1.18 μg/L) concentrations were higher in the water samples, while the concentrations of Zn (86.12...
Deep water lowermost Cambrian sedimentary successions, Yangtze Plate, China, contain a variety of organic (acritarchs) and siliceous (sponge spicules, radiolarians) microfossils, representing oceanic both plankton and benthos. Predominant rock types are dark bedded cherts and black shales, with phosphorite concretions and phosphatic limestones. Specific methods used to separate micro- fossils from...
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