Lagging spawning and increasing phenological extremes jeopardize walleye (Sander vitreus) in north-temperate lakes

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Martha E. Barta, Greg G. Sass, Jeffrey R. Reed, Thomas A. Cichosz, Aaron D. Shultz, Mark Luehring, Zachary S. Feiner
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Abstract

The phenology of critical biological events in aquatic ecosystems is rapidly shifting due to climate change. Growing variability in phenological cues can increase the likelihood of trophic mismatches (i.e., mismatches in the timing of peak prey and predator abundances), causing recruitment failures in important fisheries. We assessed changes in the spawning phenology of walleye (Sander vitreus) in 194 Midwest US lakes to investigate factors influencing walleye phenological responses to climate change and associated climate variability, including ice-off timing, lake physical characteristics, and population stocking history. Ice-off phenology shifted earlier, about three times faster than walleye spawning phenology over time. Spawning phenology deviations from historic averages increased in magnitude over time, and large deviations were associated with poor offspring survival. Our results foreshadow the risks of increasingly frequent natural recruitment failures due to mismatches between historically tightly coupled spawning and ice-off phenology.

Abstract Image

产卵滞后和极端物候的增加危及北温带湖泊中的马口铁(Sander vitreus)
由于气候变化,水生生态系统中关键生物事件的物候正在迅速变化。物候线索的日益变化会增加营养错配(即猎物和捕食者丰度峰值时间的错配)的可能性,导致重要渔业资源的招募失败。我们评估了美国中西部 194 个湖泊中马黑鱼(Sander vitreus)产卵物候的变化,以研究影响马黑鱼物候对气候变化和相关气候变异性反应的因素,包括冰期、湖泊物理特征和种群放养历史。随着时间的推移,冰期的提前比马黑鱼产卵期的提前快三倍。随着时间的推移,产卵物候与历史平均值的偏差越来越大,偏差大与后代存活率低有关。我们的研究结果预示着,由于历史上产卵和结冰物候紧密耦合的不匹配,自然招募失败的风险越来越频繁。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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