Spatial synchrony propagates through a forest food web via consumer-resource interactions
Spatial synchrony propagates through a forest food web via consumer-resource interactions
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DOI：
10.1890/08-1709.1
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发表时间：
2009-11-01
期刊：
影响因子：
4.8
通讯作者：
Johnson, Derek M.
中科院分区：
文献类型：
--
作者：
Haynes, Kyle J.;Liebhold, Andrew M.;Johnson, Derek M.
在许多研究系统中，人口在大区域内同步波动。已经提出了几种机制来解释这一点，但它们在本质上的重要性往往是不确定的。理论研究表明，在一个物种中通过莫兰效应启动的空间同步可能会在营养相关的物种之间传播，但在自然界中缺乏证据。通过应用非参数空间相关函数的时间序列数据，我们发现，密度的舞毒蛾，蛾的主要捕食者（白足鼠），和小鼠的冬季食物来源（红橡树橡子）的波动同步在类似的距离（类似1000公里），并具有类似的同步水平。此外，我们调查的重要性，消费者资源的相互作用，在传播物种之间的同步性，使用经验告知橡子，白足鼠，舞毒蛾，和舞毒蛾的病毒病原体之间的相互作用的模拟模型。我们的研究结果表明，区域随机性直接作用于人口的小鼠，蛾，或病原体可能对这些物种所显示的同步水平的影响不大。与此相反，肥大播种的同步性可以跨营养水平传播，从而解释了在白足鼠和舞毒蛾种群中观察到的同步性水平。这项工作表明，营养连锁物种之间的同步转移可能是一个主要因素，造成种间同步。
In many study systems, populations fluctuate synchronously across large regions. Several mechanisms have been advanced to explain this, but their importance in nature is often uncertain. Theoretical studies suggest that spatial synchrony initiated in one species through Moran effects may propagate among trophically linked species, but evidence for this in nature is lacking. By applying the nonparametric spatial correlation function to time series data, we discover that densities of the gypsy moth, the moth's chief predator (the white-footed mouse), and the mouse's winter food source (red oak acorns) fluctuate synchronously over similar distances (similar to 1000 km) and with similar levels of synchrony. In addition, we investigate the importance of consumer-resource interactions in propagating synchrony among species using an empirically informed simulation model of interactions between acorns, the white-footed mouse, the gypsy moth, and a viral pathogen of the gypsy moth. Our results reveal that regional stochasticity acting directly on populations of the mouse, moth, or pathogen likely has little effect on levels of the synchrony displayed by these species. In contrast, synchrony in mast seeding can propagate across trophic levels, thus explaining observed levels of synchrony in both white-footed mouse and gypsy moth populations. This work suggests that the transfer of synchrony among trophically linked species may be a major factor causing interspecific synchrony.