Winter is coming: Food web structure and seasonality in a subtropical freshwater coastal lake.
Winter is coming: Food web structure and seasonality in a subtropical freshwater coastal lake.
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DOI：
10.1002/ece3.3031
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发表时间：
2017-07
影响因子：
2.6
通讯作者：
Petrucio MM
中科院分区：
文献类型：
--
作者：
Peralta-Maraver I;Robertson AL;Rezende EL;Lemes da Silva AL;Tonetta D;Lopes M;Schmitt R;Leite NK;Nuñer A;Petrucio MM
食物网研究为评估自然群落的组织和复杂性提供了一个有用的工具。然而，食物网特性的季节性动态、环境相关性以及与群落多样性和稳定性的潜在联系仍未得到充分研究。在这里，我们浓缩了一个亚热带沿海湖泊的不完整的6年群落数据集，以研究在平均年的理想时间序列中，多样性的月度变化如何影响食物网结构。浮游植物、浮游动物、大型无脊椎动物和鱼类主要被分解到物种水平（n = 120种）。我们的研究结果表明，食物网的季节性组织可以汇总为两个月份的集群，这里分为“夏季”和“冬季”。在“冬季”，食物网的规模和复杂性下降，营养物种的数量从106个减少到82个（节点数量减少22.6%），营养相互作用从1049个减少到637个（节点数量减少39.3%）。观察到的“冬季”食物网结构的简化表明，在此期间，群落稳定性更容易受到任何变化的影响。
Food web studies provide a useful tool to assess the organization and complexity of natural communities. Nevertheless, the seasonal dynamics of food web properties, their environmental correlates, and potential association with community diversity and stability remain poorly studied. Here, we condensed an incomplete 6‐year community dataset of a subtropical coastal lake to examine how monthly variation in diversity impacts food web structure over an idealized time series for an averaged year. Phytoplankton, zooplankton, macroinvertebrates, and fish were mostly resolved to species level (n = 120 trophospecies). Our results showed that the seasonal organization of the food web could be aggregated into two clusters of months grouped here as ‘summer’ and ‘winter’. During ‘winter’, the food web decreases in size and complexity, with the number of trophospecies dropping from 106 to 82 (a 22.6% decrease in the number of nodes) and the trophic interactions from 1,049 to 637 between month extremes (a 39.3% drop in the number of links). The observed simplification in food web structure during ‘winter’ suggests that community stability is more vulnerable to the impact of any change during this period.