半自然栖息地(而非蚜虫数量或连续性)可预测农业景观中瓢虫的丰度

IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Benjamin Iuliano, Claudio Gratton, Tania N. Kim, Brian J. Spiesman
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引用次数: 0

摘要

农田周围半自然栖息地的数量是天敌数量和捕食服务的一个常见但不一致的预测指标。标准的土地覆被指标可能无法准确捕捉天敌的限制性资源的实际可用性,并可能遗漏跨时空的重要动态变化。根据动物运动和景观生态学的理论预测,拥有更多连续时空资源(即食物和庇护所)的地区应该拥有更多的天敌种群,并能加强生物控制。在两个研究年度中,我们在 24 个 1.5 千米缓冲地带的 336 块农作物田(玉米、大豆、紫花苜蓿和小谷物)和邻近的半自然栖息地斑块(草地和林地)中的瓢虫和蚜虫取样,每次取样 4 到 7 个时间点,并在其中一年用哨兵卵卡评估捕食率。我们使用蚜虫计数来模拟特定生境的蚜虫物候,并据此计算出猎物数量和连续性的景观指数。虽然不同栖息地的蚜虫数量和发生时间有很大差异,但在这些景观中,半自然栖息地数量仍比蚜虫数量或连续性指数更好地预测瓢虫数量和哨兵卵捕食率。我们的研究结果证实了瓢虫与农业景观中的半自然栖息地之间的密切关系,同时也凸显了在实际景观中测量精细尺度资源异质性的复杂性。在农业景观中保留或增加林地和草地斑块可能会支持更多的瓢虫种群,并增强作物田中的捕食。我们的研究结果表明,这些栖息地对庇护所的重要性可能大于猎物的连续性,但这一机制还需要进一步研究。未来的工作应继续完善实验方法,以成功整合景观生态学和动物行为学,支持保护目标的实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Semi-natural habitat, but not aphid amount or continuity, predicts lady beetle abundance across agricultural landscapes

Semi-natural habitat, but not aphid amount or continuity, predicts lady beetle abundance across agricultural landscapes

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来源期刊
Journal of Applied Ecology
Journal of Applied Ecology 环境科学-生态学
CiteScore
9.80
自引率
3.50%
发文量
229
审稿时长
4.5 months
期刊介绍: Journal of Applied Ecology publishes novel, high-impact papers on the interface between ecological science and the management of biological resources.The editors encourage contributions that use applied ecological problems to test and develop basic theory, although there must be clear potential for impact on the management of the environment.
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