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Seasonality and land cover characteristics drive aphid dynamics in an arid city

机译:季节性和土地覆盖特征驱动干旱城市中的蚜虫动态

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摘要

Urbanization of arid environments results in biotic communities that differ from the surrounding desert. The growth of cities has lowered biodiversity and increased abundance of generalist species, known as urbanophiles. However, the mechanisms by which specific organisms can dominate urban ecosystems remain unclear. Using an 11-year data set from the Central Arizona-Phoenix Long-Term Ecological Research program, we evaluated how aphids, an arthropod urbanophile, were affected by habitat type and seasonality in Phoenix, Arizona, USA. Twenty-five sites were selected in habitat types varying in land use and land cover characteristics. Aphids varied along a gradient of water availability and vegetation, rather than level of urbanization. Seasonal aphid abundance was the highest in the spring and lowest in the summer, a pattern that did not differ between habitat types. We developed a mathematical model parallel to our empirical study to explain how temperature may affect the temporal patterns. The analysis of our model demonstrated that although seasonal patterns were similar across habitats, slight shifts in microclimate can result in dramatic variation of population dynamics. We conclude that both land cover and climate have huge impacts on aphids and that urbanophiles are able to take advantage of favorable environmental conditions caused by urbanization. Published by Elsevier Ltd.
机译:干旱环境的城市化带来了不同于周围沙漠的生物群落。城市的发展降低了生物多样性,并增加了被称为都市嗜好者的多才多艺的物种。但是,尚不清楚特定生物能控制城市生态系统的机制。我们使用来自亚利桑那中部-凤凰城长期生态研究计划的11年数据集,评估了美国亚利桑那州凤凰城的蚜虫(一种节肢动物都市嗜人菌)如何受到栖息地类型和季节性的影响。根据土地利用和土地覆盖特征不同的栖息地类型,选择了25个地点。蚜虫沿着水和植被的梯度变化,而不是城市化水平。季节性蚜虫的丰度在春季最高,在夏季最低,这在生境类型之间没有区别。我们开发了一个与我们的经验研究平行的数学模型来解释温度如何影响时间模式。对我们模型的分析表明,尽管各个生境之间的季节模式相似,但小气候的轻微变化可能会导致种群动态的剧烈变化。我们得出的结论是,土地覆盖和气候都对蚜虫产生巨大影响,亲城市人士能够利用城市化带来的有利环境条件。由Elsevier Ltd.发布

著录项

  • 来源
    《Journal of arid environments》 |2017年第9期|12-20|共9页
  • 作者单位

    Arizona State Univ, Sch Geog Sci & Urban Planning, 975 S Myrtle Ave, Tempe, AZ 85281 USA|Arizona State Univ, Coll Integrat Sci & Arts, Polytech Campus,6073 S Backus Mall, Mesa, AZ 85212 USA;

    Arizona State Univ, Coll Integrat Sci & Arts, Polytech Campus,6073 S Backus Mall, Mesa, AZ 85212 USA;

    Arizona State Univ, Coll Integrat Sci & Arts, Polytech Campus,6073 S Backus Mall, Mesa, AZ 85212 USA;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Agriculture; Arthropod; Herbivore; Modeling; Sonoran desert; Urbanization;

    机译:农业;节肢动物;草食动物;建模;索诺兰沙漠;城市化;
  • 入库时间 2022-08-17 13:29:57

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