Feeding Behavior of Purple‐throated Fruitcrow (<i>Querula purpurata</i>: Cotingidae) in the Colombian Amazon and Its Implications for Seed Dispersal<sup>1</sup>

Parrado-Rosselli, Ángela; Amaya-Espinel, Juan David

doi:10.1111/j.1744-7429.2006.00164.x

Cited by 3 publications

(3 citation statements)

References 15 publications

(20 reference statements)

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“…Numerous studies have documented the ecological role of birds and mammals, as pollinators and dispersal agents, in forest ecology (Mcdiarmid, Ricklefs & Foster, 1977; Cant, 1979; Howe, 1986; Jordano, 1989; Fleming & Sosa, 1994; Clark, Poulsen & Parker, 2001; Bollen, Van Elsacker & Ganzhorn, 2004; Ingle, 2004; Vander Wall, Kuhn & Beck, 2005; Parrado‐Rosselli & Amaya‐Espinel, 2006; Mishra, 2007). As large‐bodied seed predators, predispersal seed predation by parrots has received particular attention (HIGGINS, 1979; Janzen, 1981; Galetti & Rodriquez, 1992;Coates‐Estrada, Estrada & Meritt, 1993; Norconk, Wertis & Kinzey, 1997; Francisco, De Oliveira Lunardi & Galetti, 2002; Bollen et al.…”

Section: Introductionmentioning

confidence: 99%

Do Meyer’s Parrots Poicephalus meyeri benefit pollination and seed dispersal of plants in the Okavango Delta, Botswana?

Boyes¹,

Perrin²

2010

African Journal of Ecology

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Recent studies of new world parrots repeatedly document, with few exceptions, that parrots are wasteful and destructive predispersal seed predators that are unlikely to contribute towards pollination and seed dispersal. Few detailed studies, however, have assessed the contribution of African parrots to forest ecology by quantifying the potential net benefit of seed and flower predation by parrots for most tree species in their diet. Due to the incidence of pollen on the heads of Meyer’s Parrots when feeding on Leguminosae flowers and the dispersal of viable seeds to the ground during seed predation, we compared destruction rates, when feeding on pods, fruits and flowers, with dispersal rates of viable seeds to the ground and frequency of head contact with reproductive apparatus to estimate net benefit from Meyer’s Parrot feeding activity. Meyer’s Parrots were not implicated in endo‐ or epizoochory, but they dropped uneaten fruit pulp and seeds to the ground during feeding bouts, thus providing ripe, undamaged seeds to secondary seed dispersers. This link with forest recruitment was weak, as all tree species utilized by Meyer’s Parrots either had more significant primary dispersal agents or were primarily wind‐dispersed. In most cases, the negative effect of seed predation outweighed any positive effects in terms of dispersal, whereby almost three times more seeds were consumed or destroyed than were dispersed to the ground. Significantly, only Sclerocarya birrea caffra recorded marginal net dispersal benefit from utilization by Meyer’s Parrots. Due to low relative resource abundance and high destruction rate, feeding activity on Berchemia discolor may be significant enough to influence its spatial distribution and abundance. Utilization of flowers of Kigelia africana and Adansonia digitata by parrots likely had a significant negative impact on pollination. Feeding on Acacia nigrescens flowers, however, was potentially advantageous to their pollination. We conclude that Poicephalus parrots are net consumers of ripe, undamaged seeds and flowers, thus having an overall negative impact on forest recruitment in subtropical Africa.

show abstract

Section: Introductionmentioning

confidence: 99%

Do Meyer’s Parrots Poicephalus meyeri benefit pollination and seed dispersal of plants in the Okavango Delta, Botswana?

Boyes¹,

Perrin²

2010

African Journal of Ecology

View full text Add to dashboard Cite

show abstract

“…Numerous studies have documented the ecological role of birds and mammals, as pollinators and dispersal agents, in forest ecology (Mcdiarmid, Ricklefs & Foster, 1977;Cant, 1979;Howe, 1986;Jordano, 1989;Fleming & Sosa, 1994;Clark, Poulsen & Parker, 2001;Bollen, Van Elsacker & Ganzhorn, 2004;Ingle, 2004;Vander Wall, Kuhn & Beck, 2005;Parrado-Rosselli & Amaya-Espinel, 2006;Mishra, 2007). As large-bodied seed predators, predispersal seed predation by parrots has received particular attention (HIGGINS, 1979;Janzen, 1981;Galetti & Rodriquez, 1992;Coates-Estrada, Estrada & Meritt, 1993;Norconk, Wertis & Kinzey, 1997;Francisco, De Oliveira Lunardi & Galetti, 2002;Trivedi, Cornejo & Watkinson, 2004;Da Silva, 2005, 2007Filardi & Tewksbury, 2005;Ragusa-Netto, 2006;Francisco et al, 2008;Haugaasen, 2008;Shepherd, Ditgen & Sanguinetti, 2008).…”

Section: Introductionmentioning

confidence: 99%

Flocking Dynamics and Roosting Behaviour of Meyer's Parrot (Poicephalus meyeri) in the Okavango Delta, Botswana

Boyes

Perrin

2009

African Zoology

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Recent studies of new world parrots repeatedly document, with few exceptions, that parrots are wasteful and destructive predispersal seed predators that are unlikely to contribute towards pollination and seed dispersal. Few detailed studies, however, have assessed the contribution of African parrots to forest ecology by quantifying the potential net benefit of seed and flower predation by parrots for most tree species in their diet. Due to the incidence of pollen on the heads of Meyer's Parrots when feeding on Leguminosae flowers and the dispersal of viable seeds to the ground during seed predation, we compared destruction rates, when feeding on pods, fruits and flowers, with dispersal rates of viable seeds to the ground and frequency of head contact with reproductive apparatus to estimate net benefit from Meyer's Parrot feeding activity. Meyer's Parrots were not implicated in endo-or epizoochory, but they dropped uneaten fruit pulp and seeds to the ground during feeding bouts, thus providing ripe, undamaged seeds to secondary seed dispersers. This link with forest recruitment was weak, as all tree species utilized by Meyer's Parrots either had more significant primary dispersal agents or were primarily wind-dispersed. In most cases, the negative effect of seed predation outweighed any positive effects in terms of dispersal, whereby almost three times more seeds were consumed or destroyed than were dispersed to the ground. Significantly, only Sclerocarya birrea caffra recorded marginal net dispersal benefit from utilization by Meyer's Parrots. Due to low relative resource abundance and high destruction rate, feeding activity on Berchemia discolor may be significant enough to influence its spatial distribution and abundance. Utilization of flowers of Kigelia africana and Adansonia digitata by parrots likely had a significant negative impact on pollination. Feeding on Acacia nigrescens flowers, however, was potentially advantageous to their pollination. We conclude that Poicephalus parrots are net consumers of ripe, undamaged seeds and flowers, thus having an overall negative impact on forest recruitment in subtropical Africa.

show abstract

“…Numerous studies have documented the ecological role of birds and mammals, as pollinators and dispersal agents, in forest ecology (Mcdiarmid, Ricklefs & Foster, 1977;Cant, 1979;Howe, 1986;Jordano, 1989;Fleming & Sosa, 1994;Clark, Poulsen & Parker, 2001;Bollen, Van Elsacker & Ganzhorn, 2004;Ingle, 2004;Vander Wall, Kuhn & Beck, 2005;Parrado-Rosselli & Amaya-Espinel, 2006;Mishra, 2007). As large-bodied seed predators, predispersal seed predation by parrots has received particular attention (HIGGINS, 1979;Janzen, 1981;Galetti & Rodriquez, 1992;Coates-Estrada, Estrada & Meritt, 1993;Norconk, Wertis & Kinzey, 1997;Francisco, De Oliveira Lunardi & Galetti, 2002;Trivedi, Cornejo & Watkinson, 2004;Da Silva, 2005, 2007Filardi & Tewksbury, 2005;Ragusa-Netto, 2006;Francisco et al, 2008;Haugaasen, 2008;Shepherd, Ditgen & Sanguinetti, 2008).…”

Section: Introductionmentioning

confidence: 99%

Flocking dynamics and roosting behaviour of Meyer’s parrot (Poicephalus meyeri) in the Okavango Delta, Botswana

Boyes

Perrin

2009

African Zoology

View full text Add to dashboard Cite

Recent studies of new world parrots repeatedly document, with few exceptions, that parrots are wasteful and destructive predispersal seed predators that are unlikely to contribute towards pollination and seed dispersal. Few detailed studies, however, have assessed the contribution of African parrots to forest ecology by quantifying the potential net benefit of seed and flower predation by parrots for most tree species in their diet. Due to the incidence of pollen on the heads of Meyer's Parrots when feeding on Leguminosae flowers and the dispersal of viable seeds to the ground during seed predation, we compared destruction rates, when feeding on pods, fruits and flowers, with dispersal rates of viable seeds to the ground and frequency of head contact with reproductive apparatus to estimate net benefit from Meyer's Parrot feeding activity. Meyer's Parrots were not implicated in endo-or epizoochory, but they dropped uneaten fruit pulp and seeds to the ground during feeding bouts, thus providing ripe, undamaged seeds to secondary seed dispersers. This link with forest recruitment was weak, as all tree species utilized by Meyer's Parrots either had more significant primary dispersal agents or were primarily wind-dispersed. In most cases, the negative effect of seed predation outweighed any positive effects in terms of dispersal, whereby almost three times more seeds were consumed or destroyed than were dispersed to the ground. Significantly, only Sclerocarya birrea caffra recorded marginal net dispersal benefit from utilization by Meyer's Parrots. Due to low relative resource abundance and high destruction rate, feeding activity on Berchemia discolor may be significant enough to influence its spatial distribution and abundance. Utilization of flowers of Kigelia africana and Adansonia digitata by parrots likely had a significant negative impact on pollination. Feeding on Acacia nigrescens flowers, however, was potentially advantageous to their pollination. We conclude that Poicephalus parrots are net consumers of ripe, undamaged seeds and flowers, thus having an overall negative impact on forest recruitment in subtropical Africa.

show abstract

Feeding Behavior of Purple‐throated Fruitcrow (Querula purpurata: Cotingidae) in the Colombian Amazon and Its Implications for Seed Dispersal¹

Cited by 3 publications

References 15 publications

Do Meyer’s Parrots Poicephalus meyeri benefit pollination and seed dispersal of plants in the Okavango Delta, Botswana?

Do Meyer’s Parrots Poicephalus meyeri benefit pollination and seed dispersal of plants in the Okavango Delta, Botswana?

Flocking Dynamics and Roosting Behaviour of Meyer's Parrot (Poicephalus meyeri) in the Okavango Delta, Botswana

Flocking dynamics and roosting behaviour of Meyer’s parrot (Poicephalus meyeri) in the Okavango Delta, Botswana

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Feeding Behavior of Purple‐throated Fruitcrow (Querula purpurata: Cotingidae) in the Colombian Amazon and Its Implications for Seed Dispersal1

Cited by 3 publications

References 15 publications

Do Meyer’s Parrots Poicephalus meyeri benefit pollination and seed dispersal of plants in the Okavango Delta, Botswana?

Do Meyer’s Parrots Poicephalus meyeri benefit pollination and seed dispersal of plants in the Okavango Delta, Botswana?

Flocking Dynamics and Roosting Behaviour of Meyer's Parrot (Poicephalus meyeri) in the Okavango Delta, Botswana

Flocking dynamics and roosting behaviour of Meyer’s parrot (Poicephalus meyeri) in the Okavango Delta, Botswana

Contact Info

Product

Resources

About

Feeding Behavior of Purple‐throated Fruitcrow (Querula purpurata: Cotingidae) in the Colombian Amazon and Its Implications for Seed Dispersal¹