Seasonality of fruiting and food hoarding by rodents in neotropical forests: consequences for seed dispersal and seedling recruitment.

Forget, P. M.; Hammond, David S.; Milleron, T.; Thomas, R.

doi:10.1079/9780851995250.0241

Cited by 60 publications

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“…JANSEN et al (2004) found that seed mass and masting fruiting were the major determinants of seed caching by acouchies -Myoprocta acouchy Erxleben, 1777 of Carapa procera DC., 1824 Meliaceae) in French Guiana. Our data does not show that intra-specific masting was an important factor to determine seed fate, since none of our studied species present fruit masting, but overall fruit availability may have been important (FORGET et al 2002, GENINI et al 2009). Nevertheless, we do not have information on seed fate on species that ripen during the season of fruit scarcity.…”

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confidence: 85%

“…The probability of seed dispersal by agoutis is affected by both seed availability and seed traits, such as seed mass and the presence of secondary compounds in the seeds (FORGET et al 2002, JANSEN et al 2004, GUIMARÃES et al 2003. However, most experiments on seed dispersal by caviomorph rodents have been done with large seeds and focused on seed mass variation within species (JANSEN et al 2004, but see FORGET et al 1998.…”

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confidence: 99%

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The role of seed mass on the caching decision by agoutis, Dasyprocta leporina (Rodentia: Agoutidae)

Galetti

Donatti²,

Steffler

et al. 2010

Zoologia (Curitiba, Impr.)

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ABSTRACT. It has been shown that the local extinction of large-bodied frugivores may cause cascading consequences for plant recruitment and overall plant diversity. However, to what extent the resilient mammals can compensate the role of seed dispersal in defaunated sites is poorly understood. Caviomorph rodents, especially Dasyprocta spp., are usually resilient frugivores in hunted forests and their seed caching behavior may be important for many plant species which lack primary dispersers. We compared the effect of the variation in seed mass of six vertebrate-dispersed plant species on the caching decision by the red-rumped agoutis Dasyprocta leporina Linnaeus, 1758 in a land-bridge island of the Atlantic forest, Brazil. We found a strong positive effect of seed mass on seed fate and dispersal distance, but there was a great variation between species. Agoutis never cached seeds smaller than 0.9 g and larger seeds were dispersed for longer distances. Therefore, agoutis can be important seed dispersers of large-seeded species in defaunated forests.

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confidence: 85%

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confidence: 99%

The role of seed mass on the caching decision by agoutis, Dasyprocta leporina (Rodentia: Agoutidae)

Galetti

Donatti²,

Steffler

et al. 2010

Zoologia (Curitiba, Impr.)

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“…Nos períodos de abundância de frutos, muitos frugívoros podem consumir as mesmas espécies, mas no período de escassez as dietas divergem (Forget et al, 2002), pois diferenças na morfologia do trato digestório permitem que as espécies utilizem diferentes alimentos, ou os mesmos alimentos de maneira diferente (Tutin et al, 1997).…”

Section: Discussão Geral E Implicações Para a Conservaçãounclassified

O mico-leão-dourado ( Leontopithecus rosalia) como dispersor de sementes na Reserva Biológica União/IBAMA, Rio das Ostras, RJ.

Lapenta¹

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“…The seed and seedling ecology of Carapa has been well documented [16,29,41,[68][69][70][71]. Seeds are exclusively dispersed by scatterhoarding rodents, especially acouchi and agouti [72,73]. The peak season for scatter-hoarding-April to May [73]-coincides with the peak seed crop for several large-seeded tree species, such Carapa [74].…”

Section: Study Speciesmentioning

confidence: 99%

“…Seeds are exclusively dispersed by scatterhoarding rodents, especially acouchi and agouti [72,73]. The peak season for scatter-hoarding-April to May [73]-coincides with the peak seed crop for several large-seeded tree species, such Carapa [74]. Rodents act as dispersers by removing seeds from below parent trees, and burying the seeds as food reserves in shallow, spatially scattered caches in the topsoil, each cache containing a single seed.…”

Section: Study Speciesmentioning

confidence: 99%

Rapid Assessment of Dispersal Failure and Seedling Recruitment of Large-Seeded Non-Timber Forest Products Trees in a Tropical Rainforest

Lermyte

Forget

2009

Tropical Conservation Science

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Forest managers and harvesters of non-timber forest products (NTFPs) need a tool for rapid measurement of the impact of their activities on seed dispersal and tree recruitment. Such a tool could be used for a prospective eco-label which would ensure regeneration. We propose, and have used a new rapid assessment protocol to sample and evaluate the impact of any anthropogenic disturbance on seed dispersal and seedling recruitment of hard-tegument fruit species enclosing large seeds. We set up this protocol in French Guiana for a large-seeded scatter-hoarded tree species, Carapa surinamensis (andiroba), at three different forest sites affected by a variety of anthropogenic pressures, such as hunting and logging. Over a limited time we assessed: 1) dispersal failure: from late May to mid-June, the proportion of seeds remaining undispersed was estimated by sampling the number of seeds, seedlings and fruit husks in 25-m 2 subplots under the tree crown; 2) recruitment effectiveness: in September-October, seedlings were sampled on four 100-m 2 plots located 5-15 m from the tree base around the tree crown. Altogether, 77 trees were sampled, some 1-2 hours being spent beneath each tree, during a total 4-6 weeks in the field for each dispersal and recruitment sampling. We showed that: 1) seed dispersal is affected by hunting, this being significantly marked in the coastal area, which faces major anthropogenic pressures; 2) logging treatments affect seed dispersal and regeneration, on the average. However, canopy gaps due to sylvicultural treatments raise the life expectancy of seedlings.Keywords: Andiroba, seed dispersal, seedling recruitment, rapid assessment, tropical rainforest Résumé Les gestionnaires ont besoin d'un outil permettant d'évaluer rapidement l'impact de l'exploitation forestière et de la collecte des produits forestiers non ligneux (PFNL) sur la dispersion des graines et la régénération des arbres. Cet outil permettrait d'établir un futur écolabel garantissant la régénération des espèces. Nous proposons une méthode rapide d'échantillonnage que nous avons utilisée afin d'évaluer l'impact des perturbations humaines sur la dispersion et la régénération des espèces à grosses graines et à coques dures. Nous avons testé ce protocole en Guyane française sur trois sites présentant différentes pressions anthropiques, comme la chasse et l'exploitation forestière, sur une espèce à grosses graines, Carapa surinamensis (andiroba). Dans un temps restreint, nous avons mesuré 1) la proportion de graines non dispersées : estimée entre fin mai et mi-juin en échantillonnant les graines et coques restées au sol à l'intérieur de quadrats de 25 m 2 sous la couronne ; 2) la régénération : en échantillonnant de septembre à octobre les plantules à l'intérieur de quatre quadrats de 100 m 2 , situés à 5-15 m de la base de l'arbre autour de la couronne. En 4 à 6 semaines, 77 arbres ont été échantillonnés pour la dispersion des graines et la régénération, soit 1 à 2 heures par arbre. L'étude montre que 1) la dispersion est aff...

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Seasonality of fruiting and food hoarding by rodents in neotropical forests: consequences for seed dispersal and seedling recruitment.

Cited by 60 publications

References 0 publications

The role of seed mass on the caching decision by agoutis, Dasyprocta leporina (Rodentia: Agoutidae)

The role of seed mass on the caching decision by agoutis, Dasyprocta leporina (Rodentia: Agoutidae)

O mico-leão-dourado ( Leontopithecus rosalia) como dispersor de sementes na Reserva Biológica União/IBAMA, Rio das Ostras, RJ.

Rapid Assessment of Dispersal Failure and Seedling Recruitment of Large-Seeded Non-Timber Forest Products Trees in a Tropical Rainforest

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