Ecological interactions between Cepaea nemoralis and Cepaea hortensis: competition, invasion but no niche displacement
Ecological interactions between Cepaea nemoralis and Cepaea hortensis: competition, invasion but no niche displacement
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Cepaea nemoralis 和 Cepaea hortensis 之间的生态相互作用：竞争、入侵，但没有生态位移位
DOI：
10.2307/2389710
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发表时间：
1987
影响因子：
5.2
通讯作者：
Js Jones
中科院分区：
文献类型：
--
作者：
R. Cowie;Js Jones
共同进化在塑造社区方面的重要性尚不清楚。用在阳光下褪色的油漆标记的贝壳进行的实验表明，陆地蜗牛 Cepaea hortensis (Mull.) 比 Cepaea nemoralis (L.) 更容易暴露在日光下，但当蜗牛被放置在混合或单一物种种群中时，这种行为没有变化，也没有证据表明种间相互作用可能是该生态位维度的共同进化和性格位移的前兆。在过去 25 年里，马尔堡丘陵的 C. hortensis 已经入侵了许多 C. nemoralis 菌落并取代了其他菌落，这种范围的扩大可能反映了实验室中观察到的两者之间的竞争。如果这里研究的生态位维度缺乏相互作用是典型的，那么 C. hortensis 和 C. nemoralis 的相对丰度可能反映了入侵和灭绝之间的平衡，而不是共同进化。关键词: 竞争, 入侵, 生态位置换, 共同进化, 行为温度调节, 群落结构, 蜗牛, Cepaea
The importance of coevolution in shaping communities is not clear. Experiments with shells marked with a paint which fades in the sun show that the land snail Cepaea hortensis (Mull.) is more exposed to daylight than is Cepaea nemoralis (L.), but that there is no change in this behaviour when snails are placed in mixed or single species populations and no evidence of an interspecific interaction that might be a precursor of coevolution and character displacement for this niche dimension. C. hortensis on the Marlborough Downs has invaded many C. nemoralis colonies and replaced others during the past 25 years, a range expansion that may reflect the competition between the two that has been observed in the laboratory. If the lack of interaction for the niche dimension studied here is typical, the relative abundance of C. hortensis and C. nemoralis may reflect a balance between invasion and extinction rather than coevolution. Key-words: Competition, invasion, niche displacement, coevolution, behavioural thermoregulation, community structure, land snail, Cepaea