Land use cover changes the bird distribution and functional groups at the local and landscape level in a Mexican shaded-coffee agroforestry system

Alvarez-Alvarez, Edson A.; Almazán-Núñez, R. Carlos; Corcuera, Pablo; González-García, Fernando; Brito-Millán, Marlene; Alvarado-Castro, Víctor Manuel

doi:10.1016/j.agee.2022.107882

Cited by 15 publications

(10 citation statements)

References 73 publications

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“…Indeed just as in the case for forest birds, while in the forest, such farmland birds may also predate on arthropod pestprey that primarily consume forest trees and thus acquire forestbased plant carbon, and in the process, contribute to the removal of forest-tree pests. Such dynamic dispersal opportunities and trophic interaction options may be pivotal in facilitating avian and arthropod functional roles in promoting ecological connectivity and energy exchange between the agricultural and forest ecosystems (Alvarez-Alvarez et al, 2022). Furthermore, maize's highest proportion in birds' tissues at both the overall and the family levels underscores its importance over legume plants in the overall sustenance of all insectivorous birds across the farm-forest edge zone in this broader agrarian landscape.…”

Section: Plant Basal Carbon In Bird Tissuesmentioning

confidence: 99%

“…As a consequence of these factors, only species adapting to such perturbations can persist in forest-farm ecotones and have to disperse across habitat to obtain resources necessary for their survival (Bos et al, 2007;Gonzalez et al;Alvarez-Alvarez et al, 2022). For instance, bees and wasps normally establish colonies in forests but often forage for nectar on neighboring farmlands (Hill and Webster, 1995) and many butterfly species oviposit and breed on croplands but roost and hibernate in woodlands (Sosa-Aranda et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Tropical insectivorous birds’ predation patterns that promote forest–farmland trophic connectivity for integrated top–down pest biocontrol

Otieno,

Mukasi

2023

Front. Environ. Sci.

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Although conversion of natural forest to agriculture can negatively impact biodiversity in many ways, some affected species may respond by dispersing across the forest–farmland eco-zone, thereby facilitating functional connections through food-web interactions beneficial to crop production and forestry. This study examined patterns of Lepidoptera (butterflies and moths), Hemiptera (bugs), and Coleoptera (beetles) herbivory, and insectivorous bird predation within forest-adjacent farms in western Kenya, and how these processes trophically connect the two ecosystems to promote pest biocontrol. Through δ13C and δ15N stable isotope analyses, proportions of maize, farmland legumes and forest trees in pest diets, and pest-prey in bird’s diets were estimated. Birds’ habitat associations and diet specializations’ influence on pest consumption and basal plant carbon levels in birds’ tissues were determined to evaluate birds’ pest-biocontrol potential. Maize was the mostly consumed plant especially by Lepidoptera, but forest trees were peimarily consumed by Coleoptera and Hemiptera. In turn, Lepidoptera were mainly consumed by forest-associated birds, whereas Hemiptera and Coleoptera were mostly consumed by farmland-associated birds. Thus, birds showed cross-habitat pest consumption tendencies, though diet-specialization was unimportant in predicting those tendencies. Muscicapidae (flycatchers and allies); Hirundinidae (swifts and swallows); Motacillidae (pipits and wagtails); and Ploceidae (weavers) birds showed the highest contributory potential for pest biocontrol of Lepidoptera pests, but Estrildidae (manikins and waxbills), Muscicapidae, and Malaconotidae (boubous and gonoleks) birds showed the best potential against Hemiptera and Coleoptera. Furthermore, more maize basal carbon was assimilated by forest-associated compared to farmland-associated birds, whereas most basal carbon from farmland legumes and forest trees were assimilated by farmland birds, suggesting that unlike pest-prey choice, basal plant carbon pathways to avian insectivorous consumers did not strongly mirror birds’ habitat associations. Lepidoptera and Hemiptera were potentially the most significant interhabitat trophic connector arthropods, and for birds, Muscicapidae, Ploceidae, and Estrildidae. These findings show that such functional connectivity may be enhanced through increasing structural cover elements that promote insectivorous birds’ dispersal between farmland and adjacent forests to boost their pest-regulation ecosystem service contribution. The results serve to inform effective management practices by agronomists, foresters, and land-use planners toward promoting landscape-scale-integrated pest management for sustainable agriculture and biodiversity conservation.

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Section: Plant Basal Carbon In Bird Tissuesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tropical insectivorous birds’ predation patterns that promote forest–farmland trophic connectivity for integrated top–down pest biocontrol

Otieno,

Mukasi

2023

Front. Environ. Sci.

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“…For example, it has been proven that shade trees have a complex impact on American leaf spot disease and CLR, and multiple factors, including nutrients, shade level, microclimate, and possible ecological interactions, can have a combined effect [ 37 , 57 ]. Specifically, the CATIE center in Turrialba, Costa Rica, has developed a network of long-term trials from 1990 to 2020 in agroforestry systems with coffee [ 58 , 59 ].…”

Section: Defense Mechanisms Of High Mountain Coffee and The Transitio...mentioning

confidence: 99%

“…Later, environmental degradation, primarily via soil erosion and pesticide residues, can seriously reduce productivity and environmental quality. In addition, in a scenario of accelerated global climate change (characterized by the reduction of water availability and the increase in temperature), we must not ignore that the coffee economy requires greater exploration and search for alternatives for the long term, capable of producing both in regions with optimal conditions and marginal environments [ 55 , 57 , 59 ].…”

Section: Defense Mechanisms Of High Mountain Coffee and The Transitio...mentioning

confidence: 99%

Towards an Eco-Friendly Coffee Rust Control: Compilation of Natural Alternatives from a Nutritional and Antifungal Perspective

Castillo

Acosta

Parra-Arroyo

et al. 2022

Plants

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Hemileia vastatrix (HV) is the pathogen responsible for the coffee leaf rust (CLR) disease that has spread globally. CLR causes losses of up to a billion dollars annually and affects all types of crops regardless of their production regime (organic or inorganic). Additionally, smallholders produce approximately 80% of coffee in developing countries. The condition causes losses of up to a billion dollars annually. It affects all types of crops regardless of their production regime (organic or inorganic). Approximately 80% of coffee is produced by smallholders in developing countries. Until the 90s, shaded-production systems and native varieties were encouraged; however, the rapid spread of CLR has forced farmers to migrate towards inorganic schemes, mainly due to a lack of knowledge about natural alternatives to pesticides that can be implemented to control HV. Therefore, the purpose of this article is to compile the currently existing options, emphasizing two key factors that guarantee efficient rust control: selective fungicidal activity against HV and the nutrition of coffee crops. Thus, by comprehending how these natural compounds (such as plant, bacteria, fungi, animals, or algae metabolites) impact coffee rust proliferation. Furthermore, since a various range of biochar effects contributes to the control of foliar fungal pathogens through modification of root exudates, soil properties, and nutrient availability, which influence the growth of antagonist microorganisms, we present a review of the pathogen-suppressive effects of biochar, and new control strategies suitable for organic schemes can be developed.

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“…Bird species and communities are often employed as sentinels of biodiversity, habitat condition and changes in the environment (Gottschalk et al 2010;Bregmann et al 2014;Tryjanowski & Morelli 2015;Fraixedas et al 2020;Virkkala et al 2021;Alvarez-Alvarez et al 2022). Their suitability as ecological indicators is based on a number of characteristics: (1) they occupy most habitats on the planet; (2) they are comparatively easy to monitor; and (3) their ecologies have been well studied (Carignan & Villard 2002).…”

Section: Birds As Indicatorsmentioning

confidence: 99%

Of acoustics and avifauna: An integrative approach to avian ecology across the Southern Hemisphere

Becker¹

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Ecological monitoring is taking on greater significance as we try to better understand and mitigate anthropogenic impacts on Earth’s ecosystems and species. This has led to the development of more effective avenues of ecological inference and means to inform them. These include birds and their ecology, which often represent wider ecological processes reliably. Birds are also relatively easily observable, and not just visually. Vocalising taxa, like birds, are suitable subjects for acoustic monitoring. This compatibility has drawn increased focus to interdisciplinarity and integrated approaches to ecological research. In this thesis, I aimed to adopt an integrated approach to avian ecology in different ecosystems across the Southern Hemisphere, with an emphasis on (but not restricted to) acoustic monitoring. As an introductory study, I conducted a systematic review of bioacoustics literature from Africa, which, as a continent, is particularly well suited for acoustics-based biodiversity research. I reviewed 727 publications, dating back to 1953. My analyses revealed an overall exponential increase in bioacoustics research output, but notable underrepresentation of non-mammalian, non-terrestrial, conservation/human impact, and African-led studies. My results help illustrate the potential for expanding the field of bioacoustics on several levels across Africa. Following this, I used multi-year data (2013-2018) from bird surveys in a flood-pulsed dryland wetland in southern Africa to assess the responses of seven functional groups of wetland-dependent bird to varying (remotely sensed) inundation levels and fire frequencies. I used generalised additive modelling to help predict these responses, in an attempt to relate hydrological fluctuations to ecological processes along the central channel system of Botswana’s Okavango Delta. My models robustly predicted trait-based responses of wetland-dependent birds in the delta’s interior and showcase an avenue for long-term ecological monitoring in dryland wetland systems, to support management and mitigation efforts. Finally, I used data collected from passive acoustic monitoring (PAM) and camera trap surveys to investigate the determinants of functional, phylogenetic, and taxonomic structures of bird communities in urban forest patches across Wellington City in Aotearoa New Zealand. These determinants were broadly divided into (1) forest patch characteristics and (2) relative predator abundances. I identified older forest stands, distance to a sizable ecosanctuary, and cat, possum, and rat (Rattus spp.) abundances as key determinants of urban forest bird community structures. This study presents further evidence of how functional and phylogenetic community measures can be driven by different determinants compared to taxonomic metrics. I highlight the value of these findings in an urban conservation and ecological restoration context and evaluate the use of acoustically derived bird species richness appraisal tools in urban forest habitats. My thesis demonstrates how an integrated approach to avian ecology can help track ecological integrity and inform conservation strategies in a rapidly changing world.

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Land use cover changes the bird distribution and functional groups at the local and landscape level in a Mexican shaded-coffee agroforestry system

Cited by 15 publications

References 73 publications

Tropical insectivorous birds’ predation patterns that promote forest–farmland trophic connectivity for integrated top–down pest biocontrol

Tropical insectivorous birds’ predation patterns that promote forest–farmland trophic connectivity for integrated top–down pest biocontrol

Towards an Eco-Friendly Coffee Rust Control: Compilation of Natural Alternatives from a Nutritional and Antifungal Perspective

Of acoustics and avifauna: An integrative approach to avian ecology across the Southern Hemisphere

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