Transition Features from Simplicity-Universality to Complexity-Diversification Under UHNTF

A large unified hybrid network model with a variable speed growth （LUHNM-VSG） is proposed as third model of the unified hybrid network theoretical framework （UHNTF）. A hybrid growth ratio vg of deterministic linking number to random linking number and variable speed growth index a are introduced in it. The main effects of vg and a on topological transition features of the LUHNM-VSC are revealed. For comparison with the other models, we construct a type of the network complexity pyramid with seven levels, in which from the bottom level-1 to the top level-7 of the pyramid simplicity-universality is increasing but complexity-diversity is decreasing. The transition relations between them depend on matching of four hybrid ratios （dr, fd, gr, vg）. Thus the most of network models can be investigated in the unification way via four hybrid ratios （dr, fd, gr, vg）. The LUHNM-VSG as the level-1 of the pyramid is much better and closer to description of real-world networks as well as has potential application.

三江平原小叶章种群构件生长规律与功能特征

从构件水平对典型草甸、沼泽化草甸、沼泽3个生境的小叶章种群各功能构件的生物量结构及生物量比率之间的关系进行了定量分析。结果表明，小叶章种群的个体生长和各构件生物量动态与环境条件关系密切。不同环境条件下，小叶章种群各功能构件生物量平均值具有相同的规律：茎构件〉叶构件。3个生境中小叶章整体种群水平具有一定的相似性。在地表无积水或湿润的典型草甸中，小叶章种群个体生物量和各构件生物量较沼泽化草甸和沼泽中大。不同生境下小叶章种群分株生物量的差异蕴涵着重要的生长调节和物质分配策略。3个生境均表现为优先分配茎器官，尤其是在地表无积水或湿润的典型草甸以及在不同程度季节性积水的沼泽化草甸中，小叶章种群把较多的物质分配给茎的伸长生长，以提高个体对空间和光资源的竞争。而在水分条件较好的沼泽中，小叶章种群把较多的物质分配到叶的建造上，以保证充分的物质生产。3个生境小叶章种群的叶、茎与分株的相对增重均具有相同的幂函数异速生长规律。