荒漠蜥蜴的生态研究

Studies on Ecology of Desert Lizard

植物密度、植被覆盖度、食物种数、密度和多样性是决定荒漠蜥蜴群落结构的主导因子．这些因子同时也是群落优势种的种群调节的主导因子．主导因子通过对群落中优势种种群密度的调节调控群落结构．这一理论在鸟类群落研究中得到证实．在体温调节上，荒漠蜥蜴代表了一种过渡类型；一方面具有其它变温动物所具有的行为性体温调节特点。

The community diversity of lizards was negatively interrelated to the coverage of vegetation and the density of plants fairly significantly ( r =-0 553 7, P <0 05; r =-0 551 1, P <0 05) and also to the number of species, density and diversity of potential food resources significantly( r =-0 726 0, P <0.01; r =-740 7; r =-0.641 1, P <0 01). The vegetation and food resources were the determinants of community structure. They were these determinants also determinants of population regulation of dominants in the same community. These determinants regulated the community structure by controlling the density of population that compose the communities. This theory was proved true in the study of bird community.Desert lizards are typical terrestrial poikilothermal animals. They can maintain their body temperatures in a relatively narrower range through both behavioral and physiological regulations so as to satisfy their needs for physiological activities. They are transitional types in thermaregulation. They not only have characteristics of behavioral thermaregulation. Like other poikilothermal animals, but are in the early stage of physiological thermaregulation as mammals and birds hold.