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Sea ice and local weather affect reproductive phenology of a polar seabird with breeding consequences
The Condor: Ornithological Applications ( IF 2.4 ) Pub Date : 2021-06-24 , DOI: 10.1093/ornithapp/duab032
Christophe Sauser 1 , Karine Delord 1 , Christophe Barbraud 1
Affiliation  

Breeding at the right time is essential for animals living in seasonal environments to ensure that energy requirements for reproduction, especially the nutritional needs for rearing offspring, coincide with peak food availability. Climate change is likely to cause modifications in the timing of maximum food availability, and organisms living in polar environments where the breeding period is heavily contracted may be particularly affected. Here we used a 26-year dataset to study the phenological response of a pagophilic species, the Snow Petrel (Pagodroma nivea), to climate change and its demographic impact. First, we investigated the trends and relationships between climate variables and hatching dates measured in three neighboring colonies. In a second step, we examined the impact of the hatching date and environmental covariates on the fledging probability. Our results showed that sea ice, a climate-related variable, showed a positive temporal trend. We found that hatching date was delayed when sea ice concentration was greater and local weather conditions were worse (i.e., increase in the number of windy days or the number of snow days). Hatching date had a negative effect on fledging probability, and fledging probability showed a bell-shaped temporal trend. We suggest that Snow Petrels can delay breeding phenology in response to environmental conditions. However, this plasticity may be limited as fledging success decreased with delayed hatching, potentially making the Snow Petrel vulnerable to a mismatch between resource availability and nutritional needs.

中文翻译:

海冰和当地天气影响极地海鸟的繁殖物候并产生繁殖后果

对于生活在季节性环境中的动物来说,在正确的时间进行繁殖至关重要,以确保繁殖所需的能量,特别是饲养后代的营养需求,与食物供应高峰相吻合。气候变化可能会导致最大食物供应时间的改变,生活在繁殖期严重收缩的极地环境中的生物可能会受到特别影响。在这里,我们使用了一个 26 年的数据集来研究一种喜鹊物种雪海燕 (Pagodroma nivea) 对气候变化及其人口影响的物候反应。首先,我们调查了在三个相邻殖民地测量的气候变量和孵化日期之间的趋势和关系。在第二步中,我们检查了孵化日期和环境协变量对羽化概率的影响。我们的研究结果表明,与气候相关的变量海冰呈现出正的时间趋势。我们发现,当海冰浓度较高且当地天气条件较差(即大风天数或降雪天数增加)时,孵化日期会延迟。孵化日期对出雏概率有负向影响,出雏概率呈钟形时间趋势。我们认为雪海燕可以根据环境条件延迟繁殖物候。然而,这种可塑性可能会受到限制,因为孵化成功率会随着孵化延迟而降低,这可能会使雪海燕容易受到资源可用性和营养需求之间不匹配的影响。我们的研究结果表明,与气候相关的变量海冰呈现出正的时间趋势。我们发现,当海冰浓度较高且当地天气条件较差(即大风天数或降雪天数增加)时,孵化日期会延迟。孵化日期对出雏概率有负向影响,出雏概率呈钟形时间趋势。我们认为雪海燕可以根据环境条件延迟繁殖物候。然而,这种可塑性可能会受到限制,因为孵化成功率会随着孵化延迟而降低,这可能会使雪海燕容易受到资源可用性和营养需求之间不匹配的影响。我们的研究结果表明,与气候相关的变量海冰呈现出正的时间趋势。我们发现,当海冰浓度较高且当地天气条件较差(即大风天数或降雪天数增加)时,孵化日期会延迟。孵化日期对出雏概率有负向影响,出雏概率呈钟形时间趋势。我们认为雪海燕可以根据环境条件延迟繁殖物候。然而,这种可塑性可能会受到限制,因为孵化成功率会随着孵化延迟而降低,这可能会使雪海燕容易受到资源可用性和营养需求之间不匹配的影响。我们发现,当海冰浓度较高且当地天气条件较差(即大风天数或降雪天数增加)时,孵化日期会延迟。孵化日期对出雏概率有负向影响,出雏概率呈钟形时间趋势。我们认为雪海燕可以根据环境条件延迟繁殖物候。然而,这种可塑性可能会受到限制,因为孵化成功率会随着孵化延迟而降低,这可能会使雪海燕容易受到资源可用性和营养需求之间不匹配的影响。我们发现,当海冰浓度较高且当地天气条件较差(即大风天数或降雪天数增加)时,孵化日期会延迟。孵化日期对出雏概率有负向影响,出雏概率呈钟形时间趋势。我们认为雪海燕可以根据环境条件延迟繁殖物候。然而,这种可塑性可能会受到限制,因为孵化成功率会随着孵化延迟而降低,这可能会使雪海燕容易受到资源可用性和营养需求之间不匹配的影响。我们认为雪海燕可以根据环境条件延迟繁殖物候。然而,这种可塑性可能会受到限制,因为孵化成功率会随着孵化延迟而降低,这可能会使雪海燕容易受到资源可用性和营养需求之间不匹配的影响。我们认为雪海燕可以根据环境条件延迟繁殖物候。然而,这种可塑性可能会受到限制,因为孵化成功率会随着孵化延迟而降低,这可能会使雪海燕容易受到资源可用性和营养需求之间不匹配的影响。
更新日期:2021-06-24
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