Diet of Acorn Woodpeckers at La Primavera Forest, Jalisco, Mexico

Rosas-Espinoza, Verónica Carolina; Maya-Elizarrarás, Elisa; Bustos, Óscar; Huerta-Martínez, Francisco Martín

doi:10.1676/06-102.1

Cited by 5 publications

(7 citation statements)

References 21 publications

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“…Within territories, woodpecker usage of acorn source trees is complex, and we were able to detect only a rough general pattern of decreased usage with distance with little relationship to local acorn source‐tree availability. Other factors may influence usage of acorn sources within territories, as acorn woodpeckers do not forage from different Quercus species according to local species abundance, and always include some portion of insects and tree sap in their diet (MacRoberts & MacRoberts 1976; Koenig & Mumme 1987; Rosas‐Espinoza et al. 2008).…”

Section: Discussionmentioning

confidence: 99%

Influence of acorn woodpecker social behaviour on transport of coast live oak (Quercus agrifolia) acorns in a southern California oak savanna

2010

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Summary1. Many plant species depend upon animals for seed dispersal, yet animals disperse seeds in pursuit of their own social and behavioural agendas. Animal social behaviour affects where and how they forage, so it must also shape patterns of seed dispersal. 2. At Sedgwick Reserve, California, USA, we established a study population of Quercus agrifolia to determine patterns of acorn foraging by the acorn woodpecker (Melanerpes formicivorous). This cooperative breeder lives in social groups that defend territories surrounding arboreal seed caches (granaries), foraging communally within these territories. 3. We genotyped pericarp tissue of 568 acorns, as well as 285 adult Q. agrifolia trees, including all adults within 150 m of 16 focal granaries. After quantifying genotyping error, we identified a genetically reliable subset of 524 acorns. We assigned a source tree to each acorn and estimated the number of seed sources per granary and seed source sharing among granaries. 4. We found one to eight distinct seed-source genotypes per granary, and an effective source diversity ranging from 1.0 to 6.6 seed sources. Of all transport events, 96.5% involve source trees within 150 m of the granaries. For one granary, all sampled acorns were transported from five trees located more than 1.3 km away, with all source trees within 90 m of each other. No measure of seed-source diversity was associated with density of potential seed sources, and the pattern of acorn movement fits three traditional dispersal curves poorly. 5. Woodpecker groups rarely collected acorns from overlapping sets of maternal sources. Some pairs of neighbouring granaries shared maternal sources, and we identify those that were probably maintained by the same woodpecker group. 6. Synthesis. Territoriality of woodpecker groups restricts both the spatial area of foraging and the sharing of seed sources. This foraging behaviour limits distances and directions of acorn transport from oaks located within woodpecker territories. Dispersal agents with this type of social structure will create a high degree of local genetic structure. Extreme behavioural variations may result in anomalous long-distance dispersal events that increase genetic connectivity, but are likely to do so in an episodic and erratic fashion.

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Section: Discussionmentioning

confidence: 99%

Influence of acorn woodpecker social behaviour on transport of coast live oak (Quercus agrifolia) acorns in a southern California oak savanna

2010

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“…In tropical areas, the avian breeding season is considered to occur during the months of March to September (Skutch 1950, Stiles & Skutch 2007. Acorn Woodpecker studies showed similar patterns, with breeding occurring between early March (Russell 1964, Kattan 1988) and mid-June (Russell 1964, Rosas-Espinoza et al 2008, Flores 2017), but breeding has also been reported to occur in August (Skutch 1969, Flores 2017. This resembles the bimodal breeding season reported for Californian Acorn Woodpeckers, which consists of one main peak in spring (early April and late June) and a second lesser one in autumn, starting in August and extending as late as early November.…”

Section: Acorn Woodpecker Neotropical Populationsmentioning

confidence: 81%

“…Reported group size from the seven Neotropical studies ranged from two to ten members, similar values to those found in Nearctic populations (Table 1), and with the same components . Supporting the assertion that Neotropical Acorn Woodpeckers are organized in three components are observations of multiple adults in groups (Kattan 1988, Stanback 1989); a report of egg removal and consumption by a female of the same group (Flores 2017), typical of the competition faced by females when laying eggs communally ; and the large number of juveniles, with bigger groups regularly having three to four young per year (Rosas-Espinoza et al 2008, Flores 2017). Unfortunately, temperate-tropical comparisons of Acorn Woodpecker demography necessary to understand selective pressures favoring communal groups are limited given the absence of studies on juvenile survival rates and population dynamics outside of the USA.…”

Section: Acorn Woodpecker Neotropical Populationsmentioning

confidence: 96%

“…Later studies have focused on particular aspects of Acorn Woodpecker ecology, based mainly on observations on the food habits and social organization ranging from a few days to a year. Observational studies have been widely spread both geographically and temporally with seven studies over the last four decades (Koenig & Williams 1979, Stacey 1981, Kattan 1988, Stanback 1989, Wong 1989, Rosas-Espinoza et al 2008, Flores 2017.…”

Section: Introductionmentioning

confidence: 99%

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Social Organization and Food Habits of the Acorn Woodpecker (Melanerpes Formicivorus) in the Neotropics Including Observations in Central Honduras

Flores

Ardón

2018

Ornitol. Neotrop.

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∙ Acorn Woodpeckers (Melanerpes formicivorus) have been widely studied in North America, mainly due to their complex social system. As a resident bird, Acorn Woodpeckers in much of North America hoard acorns for use during the winter and following spring. The importance of this resource, along with geographic differences in the woodpecker’s ecology, has not been as widely studied elsewhere in its range, which extends all the way through Middle America to northern Colombia. This review summarizes published research from five different countries and adds information gathered for a new locality, central Honduras. The results show a gradual change in the importance of acorn storage and a greater variety of foraging behaviors, but with little or no change in social organization. The review highlights the many geographical voids and the need for more thorough studies in most locations to further understand the variation in social and foraging behaviors present throughout this bird’s wide geographical range. Resumen ∙ Organización social y hábitos alimenticios del Carpintero Bellotero (Melanerpes formicivorus) en el Neotrópico incluyendo observaciones del centro de Honduras El Carpintero Bellotero (Melanerpes formicivorus) ha sido ampliamente estudiado en Norteamérica, principalmente debido a su complejo sistema social. Como ave residente, el Carpintero Bellotero en gran parte de Norteamérica acumula bellotas de roble para utilizarlas durante el invierno, y la primavera siguiente. La importancia de este recurso, junto con las diferencias geográficas en la ecología del Carpintero Bellotero, no han sido estudiadas tan ampliamente en el resto de su rango que se extiende a lo largo de Centroamérica hasta el norte de Colombia. Esta revisión resume resultados de investigaciones publicadas de cinco países diferentes y agrega información recopilada para una nueva localidad, el centro de Honduras. Los resultados muestran una diferencia gradual en la importancia del almacenamiento de bellotas y una gran variedad de comportamientos de forrajeo, pero patrones similares en la organización social. La revisión resalta los grandes vacíos geográficos y la necesidad de estudios más exhaustivos en la mayoría de las localidades en orden de comprender las variaciones en comportamiento social y de forrajeo presentes en el amplio rango de esta ave.

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“…Las tendencias en el consumo de insectos por talla y tipo coinciden parcialmente con lo publicado por Rosas-Espinoza et al (2008) quienes señalan que algunas especies de aves consumen insectos perjudiciales o posiblemente considerados plagas forestales, por lo que coadyuvan en su control biológico vía depredación; es imperativo señalar que los registros de insectos en las dietas de Turdidae para la presente, podrían ser explicados considerando los procesos fisiológicos de digestión de cada especie y el tiempo de consumo previo a la obtención de las excretas y su relación con el tipo y tamaño de presas consumidas, por lo que la presencia de estas aves en el ANPPA tiene un efecto controlador de ciertas poblaciones de insectos plaga como lo sugiere Gámez-Virués et al (2007).…”

Section: Figura 5 Clasificación Para Familias (Especies) De Insectosunclassified

Espectro trófico de aves Turdidae en un bosque de Pinus cembroides con dos aperturas de dosel

Ugalde-Lezama

Tarango-Arámbul

Cruz-Miranda

et al. 2019

Remexca

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Durante enero a octubre de 2014 se registraron variables de aves insectívoras Turdidae con el objeto de determinar patrones de su espectro trófico considerando sus técnicas de alimentación y dietas en un bosque de Pinus cembroides bajo dos condiciones de perturbación aparente en su apertura de dosel: semiconservado (BPS) y perturbado (BPP) en el área natural protegida peña alta (ANPPA). Se emplearon métodos de línea de Canfield, cuadrantes con punto central y cuadros empotrados, corte y sacudida de ramas, recuento en puntos de 25 m con búsqueda intensiva, captura con redes de niebla mediante esfuerzo constante; así como índices de abundancia relativa (IAR), frecuencia de observación (Fo); Kruskal-Wallis, correspondencias múltiples (ACM); índices de Jacknife1, Shannon-Wiener, Jaccard; pruebas de c2, clúster, regresión Poisson (ARP). El IAR fue similar, Fo muestran analogía; Kruskal-Wallis no existen diferencias, ACM conformaron grupos definidos; la riqueza, diversidad y similitud promedio de los órdenes entomológicos fueron relativamente bajas; c2 la proporción de individuos registrados son diferentes, clúster gráficamente existen diversos grupos, ARP existe efecto de algunas variables vegetales sobre las abundancias de insectos y aves. Se lograron comprender algunos patrones de la amplitud trófica de este tipo de aves; encontrando que coadyuvan en el control biológico de ciertos componentes entomológicos que pudieran tornarse perjudiciales y plagas forestales de estos bosques; generando conocimiento básico sobre el papel que juega la apertura del dosel en la presencia de presas; sin embargo, parece no tenerlo sobre las abundancias avifaunísticas en esta región particular de México.

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Diet of Acorn Woodpeckers at La Primavera Forest, Jalisco, Mexico

Cited by 5 publications

References 21 publications

Influence of acorn woodpecker social behaviour on transport of coast live oak (Quercus agrifolia) acorns in a southern California oak savanna

Influence of acorn woodpecker social behaviour on transport of coast live oak (Quercus agrifolia) acorns in a southern California oak savanna

Social Organization and Food Habits of the Acorn Woodpecker (Melanerpes Formicivorus) in the Neotropics Including Observations in Central Honduras

Espectro trófico de aves Turdidae en un bosque de Pinus cembroides con dos aperturas de dosel

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