Bolger Douglas T, Case Ted J
Department of Biology, University of California, San Diego, 0116, 92093-0116, La Jolla, CA, USA.
Oecologia. 1994 Dec;100(4):397-405. doi: 10.1007/BF00317861.
We report differences in the thermal biology, elevational, temporal and geographic distributions of sympatric clones of the widespread asexual house gecko, Lepidodactylus lugubris. The two most common L. lugubris clones in Fiji, clones 2NA and 2NB, differ significantly in preferred temperature as measured in a laboratory heat gradient, but were similar in critical thermal maximum and minimum. Significant differences were found in the relative frequency of clones 2NA, 2NB, and a third Fijian clone, clone 3NB, at seven sites along an elevational gradient in Fiji. Clone 2NB was not collected at sites above 235 m, consistent with its higher preferred temperature, whereas clone 2NA was captured as high as 835 m. Clone 3NB was extremely rare at sealevel (1% of all individuals at three sites below 100 m), but predominated at the two highest-elevation sites (42% and 100%). Clones 2NA and 2NB did not differ significantly in their activity time or ambient activity temperature at low-elevation sites. Clone 3NB however, was active on significantly cooler nights at two of those sites. These significant inter-clonal differences in spatial and temporal distribution should allow a more complete utilization of resources by the assemblage of clones than by any single clonal genotype, and may promote coexistence of clones at a within-island and within-site scale. Clone 2NA, which is the most common clone in Fiji and has the broadest elevational distribution, also has the widest geographic distribution. It was the predominant clone at 27 of 34 sites surveyed in nine Pacific archipelagoes. This suggests that the ecological attributes that favor this clone in Fiji also favor it elsewhere in the Pacific despite differing environmental conditions and clonal composition in those areas.
我们报告了广泛分布的无性繁殖家壁虎（ Lepidodactylus lugubris）同域克隆在热生物学、海拔、时间和地理分布上的差异。斐济最常见的两种L. lugubris克隆，即克隆2NA和2NB，在实验室热梯度中测得的偏好温度上有显著差异，但在临界热最大值和最小值方面相似。在斐济沿海拔梯度的七个地点，克隆2NA、2NB和第三个斐济克隆3NB的相对频率存在显著差异。克隆2NB在海拔235米以上的地点未被采集到，这与其较高的偏好温度一致，而克隆2NA在高达835米的地方被捕获。克隆3NB在海平面极为罕见（在海拔100米以下的三个地点占所有个体的1%），但在两个海拔最高的地点占主导地位（分别为42%和100%）。克隆2NA和2NB在低海拔地点的活动时间或环境活动温度上没有显著差异。然而，克隆3NB在其中两个地点的夜间活动温度明显更低。这些克隆在空间和时间分布上的显著差异，应使克隆组合比任何单一克隆基因型更能充分利用资源，并可能促进克隆在岛内和地点尺度上的共存。克隆2NA是斐济最常见的克隆，海拔分布最广，地理分布也最广。在九个太平洋群岛调查的34个地点中，有27个地点它是主要克隆。这表明，在斐济有利于该克隆的生态属性，尽管其他地区环境条件和克隆组成不同，但在太平洋其他地方也有利于它。
