Rogovin K A
A. N. Severtzov Institute of Ecology and Evolution, Moscow, Russia.
Zh Obshch Biol. 1998 Sep-Oct;59(5):477-97.
Between-year variation of rodent population densities was studied in the central part of trans-Altai Gobi, Mongolia, in summers of a nine year period. Variation in spatial structure of the desert rodent community in 1982-84 and in 1992 was examined by the use of discriminant function analysis. Although population densities, breadth and positions of niches of many species tended to vary independently, the positive conjunct variation was found for the most ecologically distinctive species. This can be explained by limitations of the climate. Although a guild structure of the community was pronounced each year, there were significant between year shifts in niche breadth and niche centres along certain axes of ecological space. Within year nearest neighbours in niche overlap (high seasonal overlap) differed in between year variation in abundance. It is supposed that interspecific competition could contribute to development of community structure.
在九年期间的夏季，对蒙古阿尔泰山脉戈壁中部的啮齿动物种群密度的年间变化进行了研究。通过判别函数分析，研究了1982 - 1984年和1992年沙漠啮齿动物群落空间结构的变化。尽管许多物种的种群密度、生态位宽度和位置往往独立变化，但发现生态上最具特色的物种存在正向联合变化。这可以用气候限制来解释。尽管每年群落的功能群结构都很明显，但生态位宽度和生态位中心在生态空间的某些轴上存在显著的年间变化。在年间，生态位重叠的最近邻（高季节重叠）在丰度的年间变化上存在差异。据推测，种间竞争可能有助于群落结构的发展。
