Influence of landscape context on the abundance of native bee pollinators in tomato crops in Central Brazil

Franceschinelli, Edivani Villaron; Elias, Marcos A. S.; Bergamini, Leonardo Lima; Silva-Neto, Carlos de Melo e; Sujii, Edison Ryoiti

doi:10.1007/s10841-017-0015-y

Cited by 22 publications

(7 citation statements)

References 69 publications

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“…Although roughly a third of that forest cover has since been lost, due primarily to human activities within the past 300 years, roughly 27% of the global land area remains forested (Ritchie & Roser, 2021). In some regions, forest loss has been far more extensive than these global estimates suggest, particularly within urbanized or intensive agricultural production landscapes where forests are typically limited to small fragments or narrow corridors bordering fields, streams, or roads (Proesmans et al ., 2019; Zelaya et al ., 2018; Franceschinelli et al ., 2017; Lentini et al ., 2012). Moreover, most remaining forests have changed substantially in their structure and/or composition due to logging practices, fragmentation, altered fire regimes, the intentional planting of exotic tree species, and the introduction of other non‐native organisms (e.g.…”

Section: Introductionmentioning

confidence: 99%

Forests are critically important to global pollinator diversity and enhance pollination in adjacent crops

et al. 2023

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Although the importance of natural habitats to pollinator diversity is widely recognized, the value of forests to pollinating insects has been largely overlooked in many parts of the world. In this review, we (i) establish the importance of forests to global pollinator diversity, (ii) explore the relationship between forest cover and pollinator diversity in mixed‐use landscapes, and (iii) highlight the contributions of forest‐associated pollinators to pollination in adjacent crops. The literature shows unambiguously that native forests support a large number of forest‐dependent species and are thus critically important to global pollinator diversity. Many pollinator taxa require or benefit greatly from resources that are restricted to forests, such as floral resources provided by forest plants (including wind‐pollinated trees), dead wood for nesting, tree resins, and various non‐floral sugar sources (e.g. honeydew). Although landscape‐scale studies generally support the conclusion that forests enhance pollinator diversity, findings are often complicated by spatial scale, focal taxa, landscape context, temporal context, forest type, disturbance history, and external stressors. While some forest loss can be beneficial to pollinators by enhancing habitat complementarity, too much can result in the near‐elimination of forest‐associated species. There is strong evidence from studies of multiple crop types that forest cover can substantially increase yields in adjacent habitats, at least within the foraging ranges of the pollinators involved. The literature also suggests that forests may have enhanced importance to pollinators in the future given their role in mitigating the negative effects of pesticides and climate change. Many questions remain about the amount and configuration of forest cover required to promote the diversity of forest‐associated pollinators and their services within forests and in neighbouring habitats. However, it is clear from the current body of knowledge that any effort to preserve native woody habitats, including the protection of individual trees, will benefit pollinating insects and help maintain the critical services they provide.

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Section: Introductionmentioning

confidence: 99%

Forests are critically important to global pollinator diversity and enhance pollination in adjacent crops

et al. 2023

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“…This pattern reinforces the relationship between the application frequency of agrochemicals and manufacturer's recommendation, making it vital to check the period established by the manufacturer for the product to be re-applied to a crop. The application frequency of agrochemicals, time of day and forms of application are relevant for the effects that products will have on targets (insect pests and fungi) and on non-target insects, such as bees (Franceschinelli et al, 2017). These non-target effects are relevant research topics for future studies.…”

Section: Discussionmentioning

confidence: 99%

Interaction between biological and chemistry fungicides and tomato pollinators

Neto

Ribeiro

Gomes

et al. 2018

Rev. Colomb. Cienc. Hortic.

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The use of agrochemicals is harmful to bees visiting agricultural crops, reducing production gains from pollination, but the effect of fungicides on these bees is not known. The objective of this study was to verify the effect of bee visitation influenced by different fungicides on the tomato crop and on the deposition of pollen grains on the stigma, number of seeds, mass and fruit size. The experiment was conducted with 10 treatments: (T1) control treatment, without application of agrochemicals; (T2 and T3) Bacillus subtilis in different application frequencies; (T4) copper hydroxide; (T5) B. subtilis and copper hydroxide; (T6) acibenzolar-S-methyl; (T7) (trifloxystrobin+tebuconazole) and B. subtilis; (T8) copper hydroxide+Mancozeb; (T9) propineb+(trifloxystrobin+ tebuconazole); (T10) (trifloxystrobin+tebuconazole)+B. subtilis+copper hydroxide. The presence of the pollination mark on the flower, the pollen load of the stigmas, the number of seeds per fruit, and the size and mass of the fruits were determined in each treatment. Subsequently, the mortality rate of Melipona quadrifasciata (Hymenoptera, Apidae) exposed to four fungicides (trifloxystrobin+tebuconazole; manganese and zinc; copper hydroxide; Bacillus subtilis) was estimated. The mortality rate of M. quadrifasciata over 24 h of evaluation was higher in the treatments with copper hydroxide and trifloxystrobin+tebuconazole (75 and 50%, respectively). The mortality rate was lower in the treatments with manganese and zinc and Bacillus subtilis and in the control treatment. The treatments with trifloxystrobin+tebuconazole reduced the presence of bite marks on the flowers and of pollen grains on the flower stigma. The fruits of the control treatments and treatments with B. subtilis and copper hydroxide were larger and had greater mass, as compared to other agrochemicals. Thus, a higher number of pesticide applications on the tomatoes reduced bee visitation rates to the flowers and, consequently, reduced the amount of pollen grains deposited on the stigmas, also reducing the fruit production.

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“…For example, buildings may interfere with wind patterns that transport pollen (Emberlin and Norris-Hill, 1991). Also, urban cores typically host fewer native plant species than surrounding areas (McKinney, 2008), which may reduce the abundance (Franceschinelli et al, 2017) and species richness of bees (Matteson et al, 2008), the primary pollinators of S. lycopersicum. If so, pollinator richness and abundance, and long-distance dispersal, may be higher at Calder, which may account for why Calder was the only site that exhibited slightly fat-tailed pollen dispersal in S. lycopersicum.…”

Section: Probability Density Function Fittingmentioning

confidence: 99%

Long-Distance Pollen Dispersal in Urban Green Roof and Ground-Level Habitats

2022

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Long-distance pollen dispersal is critical for gene flow in plant populations, yet pollen dispersal patterns in urban habitats such as green roofs have not been extensively studied. Pollen dispersal patterns typically are assessed either by fitting non-linear models to the relationship between the degree of pollen dispersal and distance to the pollen source (i.e., curve fitting), or by fitting probability density functions (PDFs) to pollen dispersal probability histograms (i.e., PDF fitting). Studies using curve fitting typically report exponential decay patterns in pollen dispersal. However, PDF fitting typically produces more fat-tailed distributions, suggesting the exponential decay may not be the best fitting model. Because the two approaches may yield conflicting results, we used both approaches to examine pollen dispersal patterns in the wind-pollinated Amaranthus tuberculatus and the insect-pollinated Solanum lycopersicum at two green roof and two ground-level sites in the New York (NY, United States) metropolitan area. For the curve fitting analyses, the exponential decay and inverse power curves provided good fits to pollen dispersal patterns across both green roof and ground-level sites for both species. Similar patterns were observed with the PDF fitting analyses, where the exponential or inverse Gaussian were the top PDF at most sites for both species. While the curve fitting results are consistent with other studies, the results differ from most studies using PDF fitting, where long-distance pollen dispersal is more common than we observed. These results highlight the need for further research to compare curve and PDF fitting for predicting pollen dispersal patterns. And, critically, while long-distance pollen dispersal may be an important component of overall pollen dispersal for A. tuberculatus and S. lycopersicum in both urban green roof and ground-level sites, our results suggest it potentially may occur to a lesser extent compared with plants in less-urban areas.

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Influence of landscape context on the abundance of native bee pollinators in tomato crops in Central Brazil

Cited by 22 publications

References 69 publications

Forests are critically important to global pollinator diversity and enhance pollination in adjacent crops

Forests are critically important to global pollinator diversity and enhance pollination in adjacent crops

Interaction between biological and chemistry fungicides and tomato pollinators

Long-Distance Pollen Dispersal in Urban Green Roof and Ground-Level Habitats

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