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首页> 外文期刊>Biological Control: Theory and Application in Pest Management >Interaction between temperature and water nutrient levels on the fitness of Eccritotarsus catarinensis (Hemiptera: Miridae), a biological control agent of water hyacinth
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Interaction between temperature and water nutrient levels on the fitness of Eccritotarsus catarinensis (Hemiptera: Miridae), a biological control agent of water hyacinth

机译：温度与水养分水平对肠炎患者（Hemiptera：miridae）的健身性的相互作用，水凝集生物控制剂

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摘要

Fitness traits of insect herbivores of aquatic weeds may change with environmental conditions including temperature and water nutrient levels. Both of these factors are likely to increase due to changes in global weather patterns and human activity. We tested the interaction of temperature and nutrient status on the fitness of Eccritotarsus catarinensis, a biocontrol agent against the invasive aquatic weed, water hyacinth Eichhornia crassipes. Several life history traits were evaluated on plants grown at three constant temperatures (20, 25 and 30 degrees C) combined with three nutrient levels: oligotrophic (low), mesotrophic (medium), and eutrophic (high). When the two factors are separated, all fitness traits decreased with increasing temperature and decreasing water nutrient levels. The combination of high temperature and low water nutrient status had a greater and significant negative effect on some fitness traits: lifetime fecundity, realized fecundity and nymphal survival. The relationship between insect fitness traits and water nutrient status followed different patterns depending on temperature: a monotonic, but non-linear response at 20 degrees C, where fitness was highest at medium water nutrient status and reduced at low and high water nutrient status; and a linear monotonic response at 25 degrees C, where fitness increased with increasing water nutrient status. At 30 degrees C fitness traits were equal on plants grown in water with high and medium nutrient status and lower on those grown in water with low nutrient status. We demonstrated that a combination of low nutrient waters with higher temperatures would hamper the efficacy of this agent. Our results suggested that the negative impact of the herbivorous insects on the aquatic weed would be most successful on vigorous plants, applicable for both mesotrophic and eutrophic nutrient levels, particularly in temperate areas. (C) 2017 Elsevier Inc. All rights reserved.
机译：水生杂草的昆虫食草动物的健身性状可能随着环境条件而改变，包括温度和水营养水平。由于全球天气模式和人类活动的变化，这两种因素可能会增加。我们测试了温度和营养状况对侵入水生杂草的生物控制剂的健身性的温度和养分状况的相互作用，探讨了侵入水生杂草，水合风信子Eichhornia Crassipes。在三个恒温（20,25和30摄氏度）组合三种营养水平的植物上评估了几种寿命历史特征：寡营（低），培养型（中等）和富营养学（高）。当两个因素分开时，所有健身性状随着温度的增加和水营养水平降低而降低。高温和低水营养状况的组合对一些健身性状具有更大和显着的负面影响：终身繁殖力，实现繁殖力和少女生存。昆虫健身性状和水养分状态之间的关系遵循不同的模式，根据温度：20摄氏度的单调但非线性响应，其中适应性在中水营养状态下最高，低于水养护地位。和25摄氏度的线性单调响应，其中适应性随着水营养状况的增加而增加。在30摄氏度下，在水中生长的植物，高中营养状况和低营养状况的水中的植物等于植物。我们证明，具有较高温度的低营养水的组合将妨碍该试剂的功效。我们的研究结果表明，食草昆虫对水生杂草的负面影响将在剧烈的植物中最为成功，适用于脑养殖和富营养的营养水平，特别是在温带区域。 （c）2017年Elsevier Inc.保留所有权利。

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