Seasons and seasonality in lakes: A synthesis amid global change

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Abstract
Seasonality in environmental conditions plays a fundamental role in shaping lake ecosystems. However, patterns of seasonality vary worldwide, and these patterns are shifting over time amid global change. Thus, it is increasingly important to evaluate how seasons and seasonality are represented in lake ecosystem research. Here, we used a literature review and global data analysis to synthesize approaches for conceptualizing seasons and seasonality in lakes. We found that a wide range of criteria are used to delineate discrete seasons in published literature, including fixed dates (e.g., months, solstice/equinox), environmental thresholds (e.g., temperature and precipitation cutoffs), and lake‐specific indicators (e.g., ice cover, plankton phenology). Analyzing data from lakes worldwide, we found that using different criteria to define the same season resulted in divergent interpretations of ecosystem states. Based on our synthesis, we offer recommendations for how to incorporate seasonality into lake research and communications amid global change.
Funding Information
  • Smithsonian Institution
  • U.S. Geological Survey
  • Division of Graduate Education (1840995)
  • Institute for Critical Technologies and Applied Science, Virginia Tech
  • Emerging Frontiers Office (2318861)
  • Biological and Environmental Research (DE‐SC0023084)
  • Division of Environmental Biology (1753639)
  • Division of Environmental Biology (2306898)
  • Division of Environmental Biology (2327030)

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