A review and synthesis of bird and rodent damage estimates to select California crops

Gebhardt, Karen; Anderson, Aaron; Kirkpatrick, Katy N.; Shwiff, Stephanie A.

doi:10.1016/j.cropro.2011.05.015

Cited by 63 publications

(59 citation statements)

References 13 publications

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“…Yet, historically, agricultural scientists have primarily focused on documenting the costs of animal activity to agriculture and strategies for reducing these costs, while ecologists have championed ES research that emphasizes the conservation value of nature. Research into the negative impacts of animals in agroecosystems rarely acknowledges the potential benefits also arising from these interactions (e.g., Gebhardt et al 2011), while studies focused on the positive outcomes of animal activity emphasize benefits (i.e., ES), mostly overlooking potential costs (e.g., Wenny et al 2011). Biological control by natural enemies is one case where costs and benefits may be Electronic supplementary material The online version of this article (doi:10.1007/s13280-015-0696-y) contains supplementary material, which is available to authorized users.…”

Section: Introductionmentioning

confidence: 99%

“…Animal activity can have two major outcomes on production: (i) it can inflict costs on growers, for example, through direct damage to crops that cause yield and income losses (e.g., Gebhardt et al 2011;Murray et al 2013); and (ii) it can provide benefits via the delivery of ecosystem services (ES) like pollination or predation and parasitism of pests (e.g., Cardinale et al 2003;Garibaldi et al 2013). Understanding how to manage these two outcomes for an overall net benefit (where the overall benefits outweigh costs through a trade-off between social, ecological, and economic factors) is critical to sustainable agriculture.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pollinators, pests, and predators: Recognizing ecological trade-offs in agroecosystems

Saunders

Peisley

Rader³

et al. 2015

Ambio

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Ecological interactions between crops and wild animals frequently result in increases or declines in crop yield. Yet, positive and negative interactions have mostly been treated independently, owing partly to disciplinary silos in ecological and agricultural sciences. We advocate a new integrated research paradigm that explicitly recognizes cost-benefit trade-offs among animal activities and acknowledges that these activities occur within socialecological contexts. Support for this paradigm is presented in an evidence-based conceptual model structured around five evidence statements highlighting emerging trends applicable to sustainable agriculture. The full range of benefits and costs associated with animal activities in agroecosystems cannot be quantified by focusing on single species groups, crops, or systems. Management of productive agroecosystems should sustain cycles of ecological interactions between crops and wild animals, not isolate these cycles from the system. Advancing this paradigm will therefore require integrated studies that determine net returns of animal activity in agroecosystems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pollinators, pests, and predators: Recognizing ecological trade-offs in agroecosystems

Saunders

Peisley

Rader³

et al. 2015

Ambio

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“…Birds can be pests of agriculture, depending on crop maturity, with birds feeding on crop seedlings or harvested products (Gebhardt et al. ). Being familiar with crop development and bird species is important for potential benefits from pest control services while at the same time protecting crops from bird damage.…”

Section: Discussionmentioning

confidence: 99%

Multiscale habitat mediates pest reduction by birds in an intensive agricultural region

Heath

Long²

2019

Ecosphere

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Habitat augmentation on farms is predicted to conserve biological diversity and support beneficial animals that reduce crop pests. Effectiveness of local habitat enhancement and subsequent pest reduction services can be mediated by the amount of habitat at larger scales. We tested whether the presence and increase of local and landscape scale bird habitat increased avian predator abundance and pest reduction by birds. We surveyed birds and performed a sentinel prey exclosure experiment in walnut orchards in the Sacramento Valley, California, USA—comparing predation probability between orchards with (n = 10) and without (n = 10) woody habitat in uncultivated orchard margins. We digitized seminatural habitat cover in landscapes around orchards to test the effectiveness of avian predators in reducing sentinel prey along a seminatural cover gradient of 0–38%. Experimental prey were diapausing larvae of Cydia pomonella (L.) (Lepidoptera: Tortricidae; codling moth), a significant pest of walnuts, which overwinter in cocoons in orchards, emerge as adults, and produce larvae that feed on the nuts the following spring. Permitting bird access to cocoons increased larval predation from 11% (caged) to 46% (no cage), and predation increased with increasing proportions of seminatural habitat within 500‐m of orchard transects. Predation also increased as the size and bark furrow depth of walnut trees increased, likely because these characteristics were associated with increasing abundance of avian predators with functional traits specific to consuming tree‐dwelling cocoons (e.g., woodpeckers). The presence and increasing complexity of local margin habitat increased the species richness and abundance of avian predators but was not predictive of cocoon predation. Consistent with intermediate landscape‐complexity hypothesis predictions, the effect size of woodpecker abundance on predation was large in simple landscapes (1–20% seminatural cover) and low in complex landscapes (>20% cover). Contrary to predictions, effect size was large in cleared landscapes (<1% cover), suggesting that orchards supported predators in cleared landscapes, with positive effects on pest reduction. We provide evidence that increasing the abundance of avian predators with traits specific for consuming target pests—by retaining old trees and seminatural cover—can increase orchard pest reduction services in an intensive agricultural region.

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“…Market values are commonly used when monetizing impacts to livestock or crops (Cumming et al 2005;Engeman et al 2010;Gebhardt et al 2011). Loss values are often used in the case of death related to disease transmission, or predation of things not actively bought and sold in markets, including humans, companion animals, and sometimes wildlife.…”

Section: Methods Of Valuation Primary Impactsmentioning

confidence: 99%

Policy and Regulation

Williams¹

2017

Ecology and Management of Terrestrial Vertebrate Invasive Species in the United States

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A review and synthesis of bird and rodent damage estimates to select California crops

Cited by 63 publications

References 13 publications

Pollinators, pests, and predators: Recognizing ecological trade-offs in agroecosystems

Pollinators, pests, and predators: Recognizing ecological trade-offs in agroecosystems

Multiscale habitat mediates pest reduction by birds in an intensive agricultural region

Policy and Regulation

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