Hydrology influences breeding time in the white-throated dipper.
Hydrology influences breeding time in the white-throated dipper.
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水文学影响白喉北斗星的繁殖时间。
DOI：
10.1186/s12898-020-00338-y
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发表时间：
2020-12-17
期刊：
影响因子：
--
通讯作者：
Walseng B
中科院分区：
文献类型：
--
作者：
Nilsson ALK;Skaugen T;Reitan T;L'Abée-Lund JH;Gamelon M;Jerstad K;Røstad OW;Slagsvold T;Stenseth NC;Vøllestad LA;Walseng B
早期繁殖是对全球鸟类变化最强烈的反应之一，也是决定繁殖成功的关键因素。在大多数关于气候影响的研究中，重点一直放在大范围的环境指数或大片地理区域的平均温度上，而忽视了动物在其栖息地受到当地条件的影响。在河流生态系统中，除了对可再生和清洁水电的需求日益增加所造成的变化外，气候变化还在改变水流状况。再加上气温的升高，这可能会导致与河边栖息地相关的鸟类成功繁殖的时间窗口发生变化。在这里，我们专门研究了区域水平的环境条件如何影响水生生活方式的雀形目鸟类的繁殖时间。我们将日河流流量和其他重要的水文参数与自然河流系统中繁殖物候的长期数据集(1978-2015)联系起来。当冬季河流流量和繁殖前几周的地下水位较高，以及集水区几乎没有降雪时，勺子繁殖得更早。在低海拔地区繁殖的时间也更早，尽管在这段时间里这种影响急剧下降。这表明，在研究期间的晚些时候，海拔较高的地区冬季有更多的开阔水域，这也允许在这里进行早期繁殖。出乎意料的是，导致繁殖时间提前的最大影响是在冬季而不是在繁殖之前的领土河流流量。在研究期间，全港的河道流量亦有所增加。因此，观察到的更早的繁殖可以被解释为对气候变化的反应。因此，在领土范围内测量环境变化提供了关于生物体与非生物环境之间相互作用的详细信息。
Earlier breeding is one of the strongest responses to global change in birds and is a key factor determining reproductive success. In most studies of climate effects, the focus has been on large-scale environmental indices or temperature averaged over large geographical areas, neglecting that animals are affected by the local conditions in their home ranges. In riverine ecosystems, climate change is altering the flow regime, in addition to changes resulting from the increasing demand for renewable and clean hydropower. Together with increasing temperatures, this can lead to shifts in the time window available for successful breeding of birds associated with the riverine habitat. Here, we investigated specifically how the environmental conditions at the territory level influence timing of breeding in a passerine bird with an aquatic lifestyle, the white-throated dipper Cinclus cinclus. We relate daily river discharge and other important hydrological parameters, to a long-term dataset of breeding phenology (1978–2015) in a natural river system. Dippers bred earlier when winter river discharge and groundwater levels in the weeks prior to breeding were high, and when there was little snow in the catchment area. Breeding was also earlier at lower altitudes, although the effect dramatically declined over the period. This suggests that territories at higher altitudes had more open water in winter later in the study period, which permitted early breeding also here. Unexpectedly, the largest effect inducing earlier breeding time was territory river discharge during the winter months and not immediately prior to breeding. The territory river discharge also increased during the study period. The observed earlier breeding can thus be interpreted as a response to climate change. Measuring environmental variation at the scale of the territory thus provides detailed information about the interactions between organisms and the abiotic environment.
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影响因子：
4.8
作者：
Low, Matthew;Part, Tomas;Forslund, Par
通讯作者：
Forslund, Par
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作者：
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影响因子：
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作者：
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