热带岛屿农业生态系统中通过多营养途径控制有害生物的生态和管理驱动因素

IF 6.4 1区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY
Thibault Nève de Mévergnies , Théo Delauney , Marie-Stéphane Tixier , Camille Gendron Hoareau , Joël Huat , Anaïs Chailleux
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引用次数: 0

摘要

节肢动物天敌提供的自然害虫治理服务是生态集约化的基石。虽然已知植被多样化支持天敌群落,但其相对贡献和与其他驱动因素的相互作用仍不清楚,特别是在热带地区动态和多样化的小农农业生态系统中。在本研究中,我们研究了La r union岛热带市场园艺系统中作物和非作物地植被多样性、耕作方式、气候和景观参数如何共同影响节肢动物群落结构及其在空中和地面上的服务。我们在两个季节调查了22个露天市场园艺系统。利用多营养、分段结构方程建模方法,我们评估了当地和景观因素对节肢动物多样性和有害生物调控服务的直接和间接级联效应。结果表明,在空中群落中,非作物植被丰富度产生了一个正向的自下而上的营养级联。它增加了食草动物的多样性,从而增加了天敌的丰富程度,最终减少了害虫的数量和作物的损害,特别是在旱季。相反,杀虫剂的使用抑制了天敌的丰富度,降低了害虫的防治效果。地表生物群落受景观破碎化、半自然生境覆盖和温度的影响更大,结构性营养级联的证据较少。总体而言,植被对地上社区有害生物治理服务的有利级联效应可能超过其他管理和景观驱动因素的影响。这些发现强调了促进植被多样性和减少农药使用作为加强热带小农农业生态系统自然有害生物调控的关键战略的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ecological and management drivers of pest regulation via multitrophic pathways in tropical insular agroecosystems
Natural pest regulation services provided by arthropod natural enemies are a cornerstone of ecological intensification. While vegetation diversification is known to support natural enemy communities, its relative contribution and interactions with other drivers for pest regulation services remains unclear, especially in dynamic and diversified smallholder agroecosystems under the tropics. In this study, we investigate how crop and non-crop field vegetation diversity, farming practices, climatic and landscape parameters jointly shape arthropod community structure and their services in the aerial and ground strata in tropical market gardening systems on La Réunion Island. We surveyed 22 open-field market gardening systems during two seasons. Using a multitrophic, piecewise structural equation modeling approach, we assessed direct and indirect cascading effects of local and landscape factors on arthropod diversity and pest regulation services. Results show that in aerial communities, non-crop vegetation richness generated a positive bottom-up trophic cascade. It enhanced herbivore diversity which, in turn, increased natural enemy richness, ultimately reducing pest abundance and crop damage, particularly during the dry season. In contrast, insecticide use suppressed natural enemy richness and reduced the effectiveness of pest regulation. Ground-dwelling communities were more strongly influenced by landscape fragmentation, semi-natural habitat cover, and temperature, with less evidence for structured trophic cascades. Overall, beneficial cascading effects of vegetation on pest regulation services in above-ground communities may outweigh the impacts of other management and landscape drivers. These findings underscore the potential of promoting vegetation diversity and reducing pesticide use as key strategies for enhancing natural pest regulation in tropical smallholder agroecosystems.
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来源期刊
Agriculture, Ecosystems & Environment
Agriculture, Ecosystems & Environment 环境科学-环境科学
CiteScore
11.70
自引率
9.10%
发文量
392
审稿时长
26 days
期刊介绍: Agriculture, Ecosystems and Environment publishes scientific articles dealing with the interface between agroecosystems and the natural environment, specifically how agriculture influences the environment and how changes in that environment impact agroecosystems. Preference is given to papers from experimental and observational research at the field, system or landscape level, from studies that enhance our understanding of processes using data-based biophysical modelling, and papers that bridge scientific disciplines and integrate knowledge. All papers should be placed in an international or wide comparative context.
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