WHY ARE LARGER FORAMINIFERA LARGE
WHY ARE LARGER FORAMINIFERA LARGE
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DOI：
10.1017/s0094837300011507
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发表时间：
1985-01-01
期刊：
影响因子：
2.7
通讯作者：
HALLOCK, P
中科院分区：
文献类型：
--
作者：
HALLOCK, P
只有在食物资源有限的稳定环境条件下，延迟成熟和生长到大尺寸才是有利的。在有阳光的条件下，藻类共生的专门化也是非常有利的。这两个特征的共同进化在许多有孔虫谱系中发生过多次。这些性状有时与胚胎大小增加和有性生殖抑制有关，这也是在稳定环境条件下最有利的特征。这些特征的特化，确保了在温暖、浅水、稳定、贫营养环境中的成功，往往会在条件变化时使物种或谱系灭绝。
Delayed maturation and growth to large sizes are only advantageous under stable environmental conditions where food resources are limited. Specialization to algal symbiosis is also highly advantageous under those conditions if sunlight is available. The coevolution of these 2 characteristics has occurred many times in many foraminiferal lineages. These traits are sometimes associated with increased embryon size and suppression of sexual reproduction, which are also characteristics most advantageous under stable environmental conditions. Specialization for these traits, ensuring success in warm, shallow, stable, oligotrophic environments, often dooms the species or lineage to extinction when conditions change.