Results 231 to 240 of about 133,458 (260)

The Janzen–Connell hypothesis and seed masting

Trends in Ecology & Evolution
The Janzen-Connell hypothesis (JC effect) has been proposed as a mechanism for explaining high tropical tree diversity via negative conspecific density dependence imposed by natural enemies. Seed masting describes the uneven investment in reproduction between years, and could be a mechanism for reducing seed predation by means of predator satiation. JC
T. Jonathan Davies, Janneke Hille Ris Lambers, E.M. Wolkovich   +2 more
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Cephalotaxine homologous alkaloids from seeds of Cephalotaxus oliveri Mast

Phytochemistry, 2022
Six undescribed isoquinoline alkaloids, named as cephaloliverines A-F, were isolated from the seeds of Cephalotaxus oliveri. They were identified by NMR and MS spectroscopic data analyses, combined with the time-dependent density functional theory ECD calculation for cephaloliverines A and B and also by X-ray crystal diffraction for cephaloliverine E ...
Yu, Guang-Xing, Yu, Yang, Jing-Wu, , Zeng, Ling-Hui, Schinnerl, Johann, Cai, Xiang-Hai   +5 more
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Resource depletion, pollen coupling, and the ecology of mast seeding

Annals of the New York Academy of Sciences, 2014
Masting, the highly variable and synchronous production of seeds across a population of perennial plants, is an ecologically important, but still poorly understood, phenomenon. While much is known about the fitness benefits of masting and its effects on seed consumers and trophic interactions, less is understood about the proximate mechanisms of ...
Elizabeth E. Crone, Joshua M. Rapp
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Seed masting as a mechanism for escape from pathogens

Current Biology
Seed masting, a reproductive strategy characterized by variable and synchronous investment in reproduction among years, has attracted much attention. Masting trees incur a cost in delayed reproduction, and thus masting requires an ecological or evolutionary explanation.
T Jonathan, Davies, Ailene, MacPherson
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[A review on mast seeding studies].

Ying yong sheng tai xue bao = The journal of applied ecology, 2003
Mast seeding means that the plants of a population have a highly variable seed production in different years synchronously, and it is widely existed in perennial plants. The periodic variation of seed yield and synchrony of seed production among individuals are the key characteristics. Several hypotheses, including evolutionary bases and limitations of
Bo, Chen, Yongchang, Song, Liangjun, Da
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SEED MASS AND MAST SEEDING ENHANCE DISPERSAL BY A NEOTROPICAL SCATTER‐HOARDING RODENT

Ecological Monographs, 2004
Many tree species that depend on scatter‐hoarding animals for seed dispersal produce massive crops of large seeds at irregular intervals. Mast seeding and large seed size in these species have been explained as adaptations to increase animal dispersal and reduce predation.
Jansen, P.A., Bongers, F.J.J.M., Hemerik, L.   +2 more
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Seed size and dispersal mode select mast seeding in perennial plants

Integrative Zoology
AbstractReproduction by perennial plants varies from being relatively constant over years to the production of massive and synchronous seed crops at irregular intervals, a reproductive strategy called mast seeding. The sources of interspecific differences in the extent of interannual variation in seed production are largely unknown.
Fei, Yu, Mingming, Zhang, Yueqin, Yang, Yang, Wang, Xianfeng, Yi   +4 more
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The evolutionary ecology of mast seeding in trees

Biological Journal of the Linnean Society, 1980
The hypothesis that masting by trees is a defensive strategy which satiates seed predators in mast years and starves them in the intervening periods is tested in 59 sets of data on the seed production and pre-dispersal seed-predation of 25 tree species. Twenty-lour of the 59 data-sets support the hypothesis and show a statistically significant positive
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Scale of mast-seeding and tree-ring growth

Nature, 1998
The synchronous production of large seed crops by a population of plants1,2, known as mast-seeding, and synchronous tree-ring growth3,4 within sites are well known phenomena among trees in the temperate zone. But information about the geographic or taxonomic extent of such synchronous growth or reproduction, or about the geographic extent of switching ...
Walter D. Koenig, Johannes M. H. Knops
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How do vertebrates respond to mast seeding?

Oikos, 2015
Mast‐seeding is the synchronized and intermittent production of a large seed crop by a population of plants. The cascading effects of masting on wildlife have been well documented in granivorous rodents. Yet, the effects of mast‐seeding are potentially further reaching, since a number of generalist species can take advantage of mast years.
Michał Bogdziewicz, Rafał Zwolak, Elizabeth E. Crone   +2 more
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