北美CHIHUAHUAN荒漠旗尾更格卢鼠(DIPODOMYS SPECTABILIS)的种群生态学

本文提供了1978—1985年美国亚利桑那州Chihuahuan荒漠旗尾更格卢鼠(Dipodomys spectabilis)种群的密度、体重、繁殖、扩散和寿命的标志重捕资料。较长的寿命、较重的体重、低繁殖力和喜巢行为标志着它的灵活的生活史,这种生活史使该鼠的种群密度适应荒漠环境的变化而变化。本文还比较了与旗尾更格卢鼠共同生活于同一地区的同属物种麦利阿姆更格卢鼠(Merriam's kangaroo rat, Dipodomys merriami)的生活史性状的差异,这些差异使这两个同属物种能利用不同资源或以不同方式利用相同资源,从而保证了它们的共同生存。

POPULATION ECOLOGY OF A DESERT RODENT DIPODOMYS SPECTABILIS IN THE CHIHUAHUAN DESERT OF NORTH AMERICA

The data are presented on population density, body weight, reproduction, dispersal, life span for a population of Dipodomys spectabilis in the Chihuahuan Desert of southwestern Arizona, USA from 1978 through 1985.It's long survival,relatively heavy body weight, low reproductive effort and philopatric behavior characterize the flexible life history that enables the population density of this kangaroo rat to vary responding to wide, unpredictable fluctuations in this desert environment. The life history traits of both D. spectabilis and its congeneric species, D. merriami coexisting in the same area, arc compared. The difference of the life history traits between them permits their coexistence by enabling them to use different resources or to use the same resources in different ways.