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首页> 美国卫生研究院文献>other >Influence of Global Atmospheric Change on the Feeding Behavior and Growth Performance of a Mammalian Herbivore Microtus ochrogaster
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Influence of Global Atmospheric Change on the Feeding Behavior and Growth Performance of a Mammalian Herbivore Microtus ochrogaster

机译：全球大气变化对Micro草食草动物摄食行为和生长性能的影响

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摘要

Global atmospheric change is influencing the quality of plants as a resource for herbivores. We investigated the impacts of elevated carbon dioxide (CO2) and ozone (O3) on the phytochemistry of two forbs, Solidago canadensis and Taraxacum officinale, and the subsequent feeding behavior and growth performance of weanling prairie voles (Microtus ochrogaster) feeding on those plants. Plants for the chemical analyses and feeding trials were harvested from the understory of control (ambient air), elevated CO2 (560 µl CO2 l−1), and elevated O3 (ambient × 1.5) rings at the Aspen FACE (Free Air CO2 Enrichment) site near Rhinelander, Wisconsin. We assigned individual voles to receive plants from only one FACE ring and recorded plant consumption and weanling body mass for seven days. Elevated CO2 and O3 altered the foliar chemistry of both forbs, but only female weanling voles on the O3 diet showed negative responses to these changes. Elevated CO2 increased the fiber fractions of both plant species, whereas O3 fumigation elicited strong responses among many phytochemical components, most notably increasing the carbon-to-nitrogen ratio by 40% and decreasing N by 26%. Consumption did not differ between plant species or among fumigation treatments. Male voles were unaffected by the fumigation treatments, whereas female voles grew 36% less than controls when fed O3-grown plants. These results demonstrate that global atmospheric change has the potential to affect the performance of a mammalian herbivore through changes in plant chemistry.
机译：全球大气变化正在影响作为食草动物资源的植物的质量。我们研究了二氧化碳（CO2）和臭氧（O3）升高对两种植物加拿大一枝黄花和蒲公英的植物化学特性的影响以及断奶的野田大田鼠（Microtus ochrogaster）的摄食行为和生长性能。在Aspen的控制下（环境空气），CO2升高（560 µl CO2 lssup-1 -supup）和O3环（周围环境×1.5）升高，收获了用于化学分析和进食试验的植物。威斯康星州莱茵兰德附近的FACE（自由空气二氧化碳浓缩）厂。我们分配了单独的田鼠只从一个FACE环接收植物，并记录了7天的植物消耗量和断奶体重。升高的CO2和O3改变了两个前爪的叶片化学成分，但只有O3日粮上的雌性断奶田鼠对这些变化表现出负面反应。升高的二氧化碳增加了两种植物的纤维含量，而O3熏蒸在许多植物化学成分之间引起了强烈的反应，最显着的是使碳氮比增加了40％，氮减少了26％。消费在植物物种之间或熏蒸处理之间没有差异。雄性田鼠不受熏蒸处理的影响，而雌性田鼠饲喂O3生长的植物比对照少36％。这些结果表明，全球大气变化具有通过植物化学变化影响哺乳动物草食动物性能的潜力。

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