替代猎物对捕食者的功能反应的影响在两种情况下:有和没有内部猎物的捕食
Lizette Cicero1, Luis Enrique Chavarín-Gómez2, Daniela Pérez-Ascencio2
1Laboratorio de Ecología Aplicada al Control Biológico (ECOBI), Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City 04010, Mexico.
Insects
|May 24, 2024
概括
种子内部掠食 (IGP) 涉及掠食者攻击寄生虫. 替代猎物 (AP) 可以改变捕食者的行为,影响对生物控制的有效性,对害虫如Trialeurodes vaporariorum.
科学领域:
- 生态生态学 生态生态学
- 生物控制 生物控制
- 昆虫学 昆虫学是一门学科.
背景情况:
- 捕食者和寄生虫的联合释放在生物控制中很常见.
- 当捕食者攻击有益的寄生虫时,会发生内捕食 (IGP),这可能会破坏害虫管理.
- 随着替代猎物 (AP) 的增加,相互作用动态变得复杂.
研究的目的:
- 实证测试如果替代的猎物 (AP) 改变掠食者的功能反应 (FR) 在一个内掠食 (IGP) 背景下.
- 为了研究替代猎物 (AP) 在寄生虫存在时对Geocoris punctipes和Triaeurodes vaporariorum之间的掠食者-猎物动态的影响.
- 了解替代猎物密度如何影响生物控制剂的有效性.
主要方法:
- 实验设置涉及内掠食者Geocoris punctipes,焦点猎物Trialeurodes vaporariorum,内猎物Eretmocerus eremicus,以及替代的猎物Myzus persicae. 这两种类型的捕食者是不同的.
- 量化G. punctipes对T. vaporariorum在不同密度的替代猎物下以及在存在/缺少 guild内掠食的情况下的功能反应 (FR).
- 对捕食者消费率和处理时间的分析.
主要成果:
- 在没有IGP的情况下,Geocoris punctipes无论是否存在其他猎物,都显示出普遍的FR.
- 在IGP下,G. punctipes在低和高AP密度下表现出II型FR,增加了对焦猎物的压力.
- 增加了替代猎物的密度,导致处理时间延长,焦点猎物的消费率降低,捕食者的反应在25 AP显著转变.
结论:
- 对AP影响FR的理论预测只能在复杂的多重性相互作用中的特定条件下得到满足.
- 监测替代猎物密度至关重要,以防止生物控制有效性的中断.
- 这项研究强调了内捕食的复杂性质,以及在生物控制策略中需要仔细考虑所有相互作用的物种.
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