Results 151 to 160 of about 818 (183)

Avian dispersal of an invasive oak is modulated by acorn traits and the presence of a native oak

Forest Ecology and Management, 2022
Abstract Successful invasions of non-native plants often depend on establishing mutualistic interactions with native organisms. Animal seed dispersers can greatly enhance the spread of invasive plants. Emerging seed dispersal mutualisms might also result in indirect interactions between non-native and native plants, mediated by shared dispersal ...
Aleksandra Wröbel, Przemysław Kurek, Michał Bogdziewicz   +2 more
exaly   +2 more sources

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Acorn dispersal by the blue jay (Cyanocitta cristata)

Oecologia, 1981
Blue jays transported and cached 133,000 acorns from a stand of Quercus palustris trees in Blacksburg, Virginia, representing 54% of the total mast crop. A further 20% (49,000) of the mast crop was eaten by jays at the collecting site. A large proportion of the nuts remaining beneath the collecting trees was parasitized by curculionid larvae.
Susan, Darley-Hill, W Carter, Johnson
openaire   +2 more sources

Acorn size and tolerance to seed predators: the multiple roles of acorns as food for seed predators, fruit for dispersal and fuel for growth

Integrative Zoology, 2018
AbstractFitness of parents and offspring is affected by offspring size. In oaks (Quercus spp.), acorns vary considerably in size across, and within, species. Seed size influences dispersal and establishment of oaks, but it is not known whether size imparts tolerance to seed predators.
Andrew W, Bartlow, Salvatore J, Agosta, Rachel, Curtis, Xianfeng, Yi, Michael A, Steele   +4 more
openaire   +2 more sources

Rheological behaviour of acorn starch dispersions: effects of concentration and temperature

International Journal of Food Science & Technology, 2009
SummaryRheological properties of acorn starch dispersions at different concentrations (4%, 5%, 6% and 7%) were evaluated under steady and dynamic shear conditions. The flow behaviours of the acorn starch dispersions at different temperatures (25, 40, 55 and 70 °C) were determined from the rheological parameters provided by the power law model.
Won‐Woo Kim, Byoungseung Yoo
openaire   +1 more source

Rodents change acorn dispersal behaviour in response to ungulate presence

Oikos, 2007
Small rodents are prominent seed predators, but they also favour plant recruitment as seed dispersers. The direct interactions of ungulates on plants are more one‐sided and negative, as they mainly reduce plant recruitment through predation on seeds and seedlings. The effects of small rodents and ungulates on plant recruitment have
Alberto Muñoz, Raúl Bonal
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Dispersal of Quercus mongolica acorns in a broadleaved deciduous forest

Forest Ecology and Management, 1988
Abstract Effects of two sets of factors on the disappearance of acorns of Q. mongolica var. grosserrata were investigated. Acorns were distributed on (a) the floor of a forest with its canopy intact, (b) the floor of a forest clearing, (c) the vegetated sloping bank of a forest road, and (d) a bare forest road.
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Distribution patterns of acorns after primary dispersion in a fragmented oak forest and their consequences on predators and dispersers

European Journal of Forest Research, 2013
Forest fragmentation affects seed production, but little is known about how seeds are distributed in fragmented forests after primary dispersion and how this affects their interactions with other organisms. This study addressed these issues in a fragmented oak forest of Quercus laeta where four habitat types were recognized: interior and edge of ...
Carlos Renato Ramos-Palacios, Ernesto I. Badano, Joel Flores, Jorge A. Flores-Cano, José L. Flores-Flores   +4 more
openaire   +1 more source

Context-dependent seed dispersal determines acorn survival of sympatric oak species

Plant Ecology, 2014
Seed traits play an important role in seed dispersal and possibly in eventual plant community structure and dynamics. Though seed traits have been shown to influence seed dispersal of one given tree species, it is not clear if and how seed dispersal and seed survival of one tree species are affected by neighboring tree species at inter-specific level ...
Xianfeng Yi, Zhenyu Wang, Yi Xianfeng
exaly   +2 more sources

Context-dependent post-dispersal predation of acorns in a California oak community

Acta Oecologica, 2018
Abstract Seed dispersal and predation play important roles in plant life history by contributing to recruitment patterns in the landscape. Mast-seeding – extensive synchronized inter-annual variability in seed production – is known to influence the activity of acorn consumers at source trees, but little is known about its effect on post-dispersal ...
Spencer C. Schubert, Mario B. Pesendorfer, Walter D. Koenig   +2 more
openaire   +1 more source

Ecology of Acorn Dispersal by Small Mammals in Montane Forests of Chiapas, Mexico

2006
The highlands of central and eastern Mexico are the major centre of diversity (60–75 species) for the genus Quercus (Nixon 1993; Chap. 1). Oaks are canopy dominants in many forests in the mountains of Mexico, and provide a wide range of biological resources for insect, mammal and bird species (QuintanaAscencio et al. 1992; Tovar-Sanchez et al.
Robert H Manson
exaly   +2 more sources