Spatiotemporal dynamics of active flying Diptera predators among different farmland habitats

Harterreiten-Souza, Érica Sevilha; Togni, Pedro Henrique Brum; Capellari, Renato Soares; Bickel, Daniel J.; Pujol-Luz, José Roberto; Sujii, Edison Ryoiti

doi:10.1111/afe.12435

Cited by 10 publications

(5 citation statements)

References 34 publications

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“…In addition to reducing pesticide use, ecologically intensive on‐farm practices, such as planting floral border crops, can improve habitat characteristics by providing additional nectar sources, hosting alternative prey species, as well as increasing the structural complexity and ground cover present, which can increase or help conserve populations of beneficial insects (Amaral et al, 2016; Langellotto & Denno, 2004; Rosas‐Ramos et al, 2020). Although not well captured in our study (most likely due to survey methodology, which was biased towards intercepting less mobile species), parasitic wasps and some flies, two important natural enemy groups of YSB (IRRI, 2018), also demonstrably benefit from additional floral resources, particularly from the nectar and pollen resources they provide (Pollier et al, 2019; Tschumi et al, 2016) as well as other local habitat features such as open fields (Harterreiten‐Souza et al, 2021).…”

Section: Discussionmentioning

confidence: 86%

The benefits of floral border crops in smallholder rice production depends on agronomic inputs and landscape context

Willcox,

Garratt,

Breeze

et al. 2024

Agri and Forest Entomology

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Ecological intensification (EI) provides an important and increasingly adopted pathway for achieving more sustainable agricultural systems. However, the implementation and success of on‐farm EI practices may vary depending on landscape context and local management practices. We evaluated how EI interventions, including two different agricultural input regimes (high or low use of synthetic pesticides and fertilizers) and floral border crops, affected local natural enemy biodiversity, pest abundance and crop yield, and how this was influenced by the surrounding landscape context across 12 rice fields on smallholder farms in Puducherry, India. Reducing agricultural inputs positively impacted the overall natural enemy assemblage; however, responses to landscape factors varied. For example, coccinellid beetles were negatively correlated with higher densities of field edges (landscape configuration). In contrast, spiders, the most abundant group surveyed, were not significantly influenced by any landscape metric. Furthermore, pest abundance was greatest in fields with reduced inputs but only at sites where floral border crops were not present. Mean rice grain yield was lower across low‐input sites compared with high‐input sites and floral border crops had opposing effects across high‐ and low‐input sites. At low‐input sites, mean yields were 33% higher where floral border crops were present. At high‐input sites, the presence of floral border crops was correlated with a lower mean yield (16%). These findings show that ecological intensification practices can benefit smallholder crop systems but highlight the need to account for variations in landscape context and local management practices for developing effective sustainable management practices.

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Section: Discussionmentioning

confidence: 86%

The benefits of floral border crops in smallholder rice production depends on agronomic inputs and landscape context

Willcox,

Garratt,

Breeze

et al. 2024

Agri and Forest Entomology

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“…These favorable conditions are further provided by surrounding natural habitat patches, explaining why NE abundance and richness increased with the amount of natural vegetation on smaller scales. The presence of NEs is conditioned to the amount of close and accessible prey in the crop (Harterreiten‐Souza et al, 2021; Nicholls et al, 2001), and NEs will be more abundant and active near habitat interfaces. Furthermore, such habitats can sustain NE populations during disturbances and ensure crop recolonization afterward (Togni, Venzon, Souza, Sousa, et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Natural habitat connectivity and organic management modulate pest dispersal, gene flow, and natural enemy communities

Novaes,

Sujii,

Rodrigues

et al. 2023

Ecological Applications

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The simplification and fragmentation of agricultural landscapes generate effects on insects at multiple spatial scales. As each functional group perceives and uses the habitat differently, the response of pest insects and their associated natural enemies to environmental changes varies. Therefore, landscape structure may have consequences on gene flow among pest populations in space. This study aimed to evaluate the effects of local and landscape factors, at multiple scales, on the local infestation, gene flow and broad dispersion dynamics of the pest insect Bemisia tabaci (Genn.) Middle East‐Asia Minor 1 (MEAM‐1, former biotype B) (Hemiptera: Aleyrodidae) and its associated natural enemies in a tropical agroecosystem. We evaluated the abundance of B. tabaci populations and their natural enemy community in 20 tomato farms in Brazil and the gene flow between farms from 2019 to 2021. Landscapes dominated by agriculture resulted in larger B. tabaci populations and higher gene flow, especially in conventional farms. A higher density of native vegetation patches disfavored pest populations, regardless of the management system. The results revealed that whitefly responds to intermediate spatial scales and that landscape factors interact with management systems to modulate whitefly populations on focal farms. Conversely, whitefly natural enemies benefited from higher amounts of natural vegetation at small spatial scales, while the connectivity between natural habitat patches was beneficial for natural enemies regardless of the distance from the focal farm. The resulting dispersion model predicts that the movement of whiteflies between farms increases as the amount of natural vegetation decreases. Our findings demonstrate that landscape features, notably landscape configuration, can mediate infestation episodes, as they affect pest insects and natural enemies in opposite ways. We also showed that landscape features interact with farm traits, which highlights the need for management strategies at multiple spatial scales. In conclusion, we demonstrated the importance of the conservation of natural areas as a key strategy for area‐wide ecological pest management and the relevance of organic farming to benefit natural enemy communities in tropical agroecosystems.

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“…Forest and agroforest areas are important to natural pest enemies when abiotic conditions become more restrictive, such as during the Cerrado's dry season. They act as breeding sites and shelters, thereby maintaining the predator populations in the nearby farmland habitat (Harterreiten‐Souza et al., 2021).…”

Section: Tropical Forests and Supporting Servicesmentioning

confidence: 99%

Beyond Carbon: The Contributions of South American Tropical Humid and Subhumid Forests to Ecosystem Services

Borma

Costa

Rocha

et al. 2022

Reviews of Geophysics

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Tropical forests are key habitats for diverse organisms, and because of their wide global distribution, rich biodiversity, and long history of human use, they are also essential for providing a wide range of ecosystem services (ESs;Brandon, 2015; Brockerhoff et al., 2017;Gibson et al., 2011;Mori et al., 2017). Considerable attention has been devoted to tropical forests and their role as a natural climate solution for mitigating climate change. It is estimated that about 30% of all CO 2 emitted by human activities is removed from the atmosphere by these forests (Le Quéré et al., 2018). The important role of tropical forests as a carbon sink and stock has historically guided conservation pacts, programs, and policies for establishing targets associated with carbon storage and climate change mitigation. This role was important in developing several articles of the 1997 Kyoto Protocol (Swingland et al., 2002) and explicit policies for reducing emissions from deforestation and forest degradation through the REDD+ agreement (Pistorius, 2012). Several countries also set ambitious goals for restoring forests to reduce emissions or sequester carbon in the United Nations Framework Convention on Climate Change 2015 Paris Agreement. The land use, land cover change, and forestry (LULCCF) sector is included in many countries' first nationally determined contributions (NDCs) but with differing levels of specificity. Assuming full implementation of NDCs, Grassi et al. (2017) show that land use-and forests, in particular-emerges as a key component of the Paris Agreement: global land use will turn from a net anthropogenic source during 1990-2010 (1.3 ± 1.1 Gt CO 2 e yr −1 ) to a net sink of carbon by 2030 (up to −1.1 ± 0.5 Gt CO 2 e yr −1 ) and would provide a quarter of countries' planned emission reductions. Two tropical countries stand out regarding the magnitude of the LULCCF contribution: Brazil set ambitious goals of reducing greenhouse gas emissions by 43% by 2030 with

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Spatiotemporal dynamics of active flying Diptera predators among different farmland habitats

Cited by 10 publications

References 34 publications

The benefits of floral border crops in smallholder rice production depends on agronomic inputs and landscape context

The benefits of floral border crops in smallholder rice production depends on agronomic inputs and landscape context

Natural habitat connectivity and organic management modulate pest dispersal, gene flow, and natural enemy communities

Beyond Carbon: The Contributions of South American Tropical Humid and Subhumid Forests to Ecosystem Services

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