Loman Jon
Deptartment of Biology Lund University Lund Sweden.
Ecol Evol. 2016 Aug 3;6(17):6202-9. doi: 10.1002/ece3.2356. eCollection 2016 Sep.
Frog breeding phenology in temperate zones is usually compared to progress of spring temperatures at a regional scale. However, local populations may differ substantially in phenology. To understand this, local climate and other aspects must be studied. In this study, breeding phenology of the common frog, Rana temporaria, in a set of ponds in southern Sweden is analyzed. There was within year a variation of up to 3 weeks in start of breeding among local populations. Water temperature was measured in the ponds, and breeding tended to be earlier in warmer ponds (surprise!). Breeding was also earlier in ponds with a large breeding congregation. Alternative reasons for these patterns are suggested and discussed. There was a large residual variation. The common frog has a wide range of acceptable wintering sites, and I hypothesize that the particular choice by a local population may explain part of this residual variation.
温带地区的蛙类繁殖物候通常在区域尺度上与春季气温的变化进行比较。然而，当地种群在物候方面可能存在很大差异。为了理解这一点，必须研究当地气候和其他方面。在本研究中，对瑞典南部一组池塘中普通青蛙（林蛙）的繁殖物候进行了分析。当地种群之间繁殖开始时间在一年内最多相差3周。对池塘水温进行了测量，结果显示在较温暖的池塘中繁殖往往更早（令人惊讶！）。在有大量繁殖群体的池塘中繁殖也更早。针对这些模式提出并讨论了其他可能的原因。存在很大的剩余变异。普通青蛙有多种可接受的越冬地点，我推测当地种群的特定选择可能是造成这种剩余变异的部分原因。
