Pribil Stanislav, Houlahan Jeff E
Department of Biology, University of Miami, PO Box 249118, Coral Gables, FL 33124-0421, USA.
Proc Biol Sci. 2003 Jul 7;270(1522):1419-23. doi: 10.1098/rspb.2003.2378.
A widely held ecological tenet is that, at the local scale, populations of K-selected species (i.e. low fecundity, long lifespan and large body size) will be less variable than populations of r-selected species (i.e. high fecundity, short lifespan and small body size). We examined the relationship between long-term population trends and life-history attributes for 185 bird species in the Czech Republic and found that, at regional spatial scales and over moderate temporal scales (100-120 years), K-selected bird species were more likely to show both large increases and decreases in population size than r-selected species. We conclude that life-history attributes commonly associated with variable populations at the local scale, confer stability at the regional scale.
一个被广泛接受的生态学原则是，在局部尺度上，K选择物种（即低繁殖力、长寿命和大体型）的种群比r选择物种（即高繁殖力、短寿命和小体型）的种群变化更小。我们研究了捷克共和国185种鸟类的长期种群趋势与生活史特征之间的关系，发现，在区域空间尺度和适度的时间尺度（100 - 120年）上，与r选择物种相比，K选择鸟类物种的种群数量更有可能出现大幅增加和减少。我们得出结论，在局部尺度上通常与可变种群相关的生活史特征，在区域尺度上赋予了稳定性。
