Bird community response to landscape and foliage arthropod variables in sun coffee of central Kenyan highlands

Smith, Chris; Milligan, Megan C.; Johnson, Matthew D.; Njoroge, Peter

doi:10.1016/j.gecco.2018.e00378

Cited by 8 publications

(6 citation statements)

References 39 publications

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“…Such situation renders the difference between habitat sizes in the two islands may be less of an influencing factor in determining the diversity, as both islands seem capable of supporting an almost similar quality of bird community. As observed in other studies, bird diversity and richness in a similarly conditioned environment are seem to be more influenced by their guilds than by their habitat characteristics (Kim et al 2007, Smith et al 2018. In other words, the availability of food sources may be the key factor directly influencing the structure of the bird community.…”

Section: Resultssupporting

confidence: 53%

“…The dominance of the insectivore bird population may reflect the habitat situation in both islands that have seen clearances due to conversions to agricultural lands. Despite the fact that such process removes land covers from the areas, the agricultural crops that replace them could also provide food for insects, sustaining their population (Benton et al 2002, Smith et al 2018. The other two feed types (seed and fish) signify the original condition of the now partially beach-forested islands with large areas of agricultural land and surrounded by sea on its sides, which supply both seeds and fish to the foraging bird population.…”

Section: Resultsmentioning

confidence: 99%

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Bird diversity in transition zone of Taka Bonerate, Kepulauan Selayar Biosphere Reserve, Indonesia

et al. 2019

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Abstract. Praptiwi RA, Saab R, Setia TM, Wicaksono G, Wulandari P, Sugardjito J. 2019. Bird diversity in transition zone of Taka Bonerate, Kepulauan Selayar Biosphere Reserve, Indonesia. Biodiversitas 20: 819-823. Conservation management in the buffer and transition zones of Biosphere Reserves play an important role in ensuring enhanced core zone protection. Tambolongan and Polassi are two islands located in the administrative region of South Sulawesi, Indonesia, and part of the transition zone area of UNESCO’s Taka Bonerate-Kepulauan Selayar (TBKS) Biosphere Reserve (BR). These two islands can be considered as some of the most populated islands in the region, containing a variety of human activities. These human activities, such as the ever expanding agriculture and the building of human habitation have put pressures toward ecosystem and species conservation in the BR. Bird are often the focus of conservation efforts, due to their roles in supporting the ecological functioning of their habitats. This study aims to provide baseline data of bird diversity in Tambolongan and Polassi that can be used as a proxy indicator of ecosystem health and input to conservation strategies within the BR area. A Visual Encounter Survey (VES) method is used to examine bird diversity index. Results from the observation recorded a total of 29 species were found in both islands, with 5 listed as protected species and 3 categorized as migratory species. The comparison between the two islands showed that the bird diversity index (H’) differs only slightly (H’Tambolongan=2.98; H’Polassi=2.71). This study provided the initial attempt in understanding the role of habitats or land cover types, guild types and human interferences in determining the diversity of bird population - and related ecosystem health - in the area. Such knowledge is essential in providing the information necessary for sustainable management practices. This work represents the first study to inventorize avian species diversity in the transition zone of TBKS BR.

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Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Bird diversity in transition zone of Taka Bonerate, Kepulauan Selayar Biosphere Reserve, Indonesia

et al. 2019

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“…Instead of enhancing its buffer role as a green infrastructure in the Central Valley, the increasing abandonment turned many coffee plantations located in the urban-rural fringe into the typical urban fallow waiting for new land urban developments. Many researches confirm that heterogeneous shade-grown coffee agroforestry contributes to biodiversity maintenance for birds (Hernández et al 2013), beetles, bees, butterflies and other insects (Rojas et al 1999, Sánchez et al 2014, mammals (Granados et al 2008, Caudill et al 2015 and plants (Perfecto et al 1996, Moguel and Toledo 1999, Somarriba et al 2004, Komar 2006, Vandermeer and Perfecto 2007, Perfecto and Vandermeer 2008, Méndez et al 2010, Philpott and Bichier 2012, Perfecto et al 2014, Coral-Acosta and Pérez-Torres 2017, Smith et al 2018). Yet these researches have so far been…”

Section: Impact Of Land Cover Change On Biodiversitymentioning

confidence: 98%

The impacts of agricultural and urban land-use changes on plant and bird biodiversity in Costa Rica (1986–2014)

et al. 2021

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“…The resemblance between the crop layer, regardless of shade tree species, and the Cordia canopy suggests that Cordia attracts birds to the canopy with its high abundance of non pest arthropods, and birds then move down and spread out to forage throughout the crop layer. These results, coupled with the relatively low arthropod abundance on in the crop layer (Milligan 2014, Smith et al 2018), suggest Cordia attracts greater numbers of insect-eating birds to the canopy that subsequently spill over into the crop layer, increasing the potential for birds to predate on pest species such as coffee berry borer, white coffee stem-borer Xylotrechus quadripes , and scale insects (Superfamily Coccoidea). Our data did not suggest that native trees increased the abundance of pest species, because none of the species observed during the arthropod sampling were known coffee pests.…”

Section: Discussionmentioning

confidence: 99%

The effect of shade tree species on bird communities in central Kenyan coffee farms

KAMMERICHS-BERKE

LANE

ONG’ONDO

et al. 2022

Bird Conservation International

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Summary Shade coffee is a well-studied cultivation strategy that creates habitat for tropical birds while also maintaining agricultural yield. Although there is a general consensus that shade coffee is more “bird-friendly” than a sun coffee monoculture, little work has investigated the effects of specific shade tree species on insectivorous bird diversity. This study involved avian foraging observations, mist-netting data, temperature loggers, and arthropod sampling to investigate bottom-up effects of two shade tree taxa - native Cordia sp. and introduced Grevillea robusta - on insectivorous bird communities in central Kenya. Results indicate that foliage-dwelling arthropod abundance, and the richness and overall abundance of foraging birds were all higher on Cordia than on Grevillea. Furthermore, multivariate analyses of the bird community indicate a significant difference in community composition between the canopies of the two tree species, though the communities of birds using the coffee understorey under these shade trees were similar. In addition, both shade trees buffered temperatures in coffee, and temperatures under Cordia were marginally cooler than under Grevillea. These results suggest that native Cordia trees on East African shade coffee farms may be better at mitigating habitat loss and attracting insectivorous birds that could promote ecosystem services. Identifying differences in prey abundance and preferences in bird foraging behaviour not only fills basic gaps in our understanding of the ecology of East African coffee farms, it also aids in developing region-specific information to optimize functional diversity, ecosystem services, and the conservation of birds in agricultural landscapes.

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Bird community response to landscape and foliage arthropod variables in sun coffee of central Kenyan highlands

Cited by 8 publications

References 39 publications

Bird diversity in transition zone of Taka Bonerate, Kepulauan Selayar Biosphere Reserve, Indonesia

Bird diversity in transition zone of Taka Bonerate, Kepulauan Selayar Biosphere Reserve, Indonesia

The impacts of agricultural and urban land-use changes on plant and bird biodiversity in Costa Rica (1986–2014)

The effect of shade tree species on bird communities in central Kenyan coffee farms

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