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Forest cover and resource pulse driving natural enemies spillover into coffee plantations

Grant number: 19/00923-8
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Start date: March 01, 2019
End date: December 31, 2019
Field of knowledge:Biological Sciences - Ecology - Applied Ecology
Principal Investigator:Andrea Larissa Boesing
Grantee:Mariana Polesso Machado
Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:13/23457-6 - Interface project: relationships among landscape structure, ecological processes, biodiversity and ecosystem services, AP.BTA.TEM

Abstract

The organismal cross-habitat spillover from natural habitats to agriculture systems is one of the main processes driving pest control provision by natural enemies. Cross-habitat spillover may be affected by different co-dependent mechanisms, associated with organismal movement within agricultural matrices, with resource availability across different environments, and with landscape characteristics. We will apply a novel methodology (plasticine models) in a spatio-temporal replicated sampling design to test three hypothesis: I) that resource availability in-matrix affects natural enemies predation intensity; II) that the effect of distance from natural remnants will be mediated by the resource availability in- matrix; and III) that resource availability will determine the forest cover effects on predation intensity. We selected nine circular landscapes (1,254 ha) varying from 6% to 50% of remaining forest cover, where we will allocate artificial caterpillars (in grids with 10 models) in six sample sites along a distance gradient from the inner of the forest remnant (~100 m) to the inner of the matrix (~100 m) - composed by sun coffee plantations. We will perform this experiment in two temporal seasons: during coffee borer beetle peak of infestation (May-July 2019) and out of the peak of infestation of coffee borer beetle (January-March 2019). We will use generalized linear mixed models and a model selection (AIC) approach to test our hypothesis. This study will provide important information for a better understanding of the mechanisms linked to cross-habitat spillover of natural enemies to agricultural systems and its relationship with natural pest control, contributing to a more sustainable management of agricultural landscapes.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BOESING, ANDREA LARISSA; BIANCHI, FELIX J. J. A.; ROJAS, ANDRES; POLESSO, MARIANA; KERCHES-ROGERI, PATRICIA; RIBEIRO, MILTON CESAR; METZGER, JEAN PAUL. Seasonality modulates habitat cover effects on avian cross-boundary responses and spillover. ECOGRAPHY, v. 2022, n. 12, p. 13-pg., . (20/01779-5, 13/50421-2, 13/23457-6, 17/26093-6, 21/10195-0, 19/13802-4, 19/00923-8)