Social Plasticity Enhances Signal-Preference Codivergence
Social Plasticity Enhances Signal-Preference Codivergence
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DOI：
10.1086/726786
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发表时间：
2023-12-01
影响因子：
2.9
通讯作者：
Rodriguez，Rafael L.
中科院分区：
文献类型：
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作者：
Desjonqueres，Camille;Speck，Bretta;Rodriguez，Rafael L.
社会环境往往是动物所经历的最具活力和与健康相关的环境。在这里，我们测试了由社会环境变化引起的可塑性是否会促进信号偏好分歧——这是最近物种形成理论的一个关键预测，但在自然系统中已被证明难以验证。混合社会群体中的互动可以减少、创造或增强信号偏好差异。在后一种情况下，社会可塑性可以建立或增加选型交配。我们通过饲养两种最近分化的enchenopatrehopers来测试这一点，enchenopatrehopers是一种取食汁液的昆虫，通过植物传播的振动信号进行交流，在混合物种和单一物种聚集的处理中。异种的社会经验（在混合物种处理中）导致信号偏好的物种差异增强。我们对其中一个物种进行了测试，但发现同域和异域区域的可塑性反应没有差异，这表明信号和偏好及其可塑性反应缺乏强化。我们的研究结果支持社会可塑性可以创造或增强信号偏好差异的假设，这可能发生在缺乏长期选择的情况下，而不是在可塑性反应本身的杂交。这种社会可塑性可能会促进多样化的快速爆发。
The social environment is often the most dynamic and fitness-relevant environment animals experience. Here we tested whether plasticity arising from variation in social environments can promote signal-preference divergence—a key prediction of recent speciation theory but one that has proven difficult to test in natural systems. Interactions in mixed social aggregations could reduce, create, or enhance signal-preference differences. In the latter case, social plasticity could establish or increase assortative mating. We tested this by rearing two recently diverged species ofEnchenopatreehoppers—sap-feeding insects that communicate with plant-borne vibrational signals—in treatments consisting of mixed-species versus own-species aggregations. Social experience with heterospecifics (in the mixed-species treatment) resulted in enhanced signal-preference species differences. For one of the two species, we tested but found no differences in the plastic response between sympatric and allopatric sites, suggesting the absence of reinforcement in the signals and preferences and their plastic response. Our results support the hypothesis that social plasticity can create or enhance signal-preference differences and that this might occur in the absence of long-term selection against hybridization on plastic responses themselves. Such social plasticity may facilitate rapid bursts of diversification.