鼠类种内个性差异对种子传播影响的研究进展

程继铭, 何慧敏, 牛红玉, 张洪茂

Research progress on the effect of intraspecific personality differences on seed dispersal in rodents

Jiming Cheng, Huimin He, Hongyu Niu, Hongmao Zhang

图3 分散贮藏鼠类积极主动型个体(a)和被动反应型个体(b)对种子传播的假设。箭头粗细及方块高度表示相对作用强度; 虚线表示事件发生的概率很小(改自Zwolak & Sih, 2020)。与被动反应型个体相比, 积极主动型个体能更好地应对捕食风险, 有更大的活动范围, 并且有更高的能量需求, 所以积极主动型个体可能收集和取食更多种子, 贮藏相对较少的种子, 并将这些少量的种子分散贮藏至远离母树、开阔的地点, 有利于种子萌发和幼苗建成。

Fig. 3 Hypothetical trade-offs involved in seed dispersal by proactive individuals (a) and reactive individuals (b), illustrated with an example of a scatterhoarding rodent. The width of arrows and the height of boxes indicate the relative strength at each stage during seed-seedling period. The dashed lines indicate the low probability of the stages (revised from Zwolak & Sih, 2020). In comparison to reactive individuals, proactive individuals can better cope with the predation risk, have a larger range of activity, and have a higher energy demand, thus active individuals are more likely to collect and eat more seeds, rather than cache them, but active individuals disperse a small number of scatterhoarding seeds to be far away from the mother tree, open place, where is beneficial to seed germination and seedling establishment.