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• W2014322534 endingPage "e1745" @default.
• W2014322534 startingPage "e1745" @default.
• W2014322534 abstract "Background Some neotropical, fleshy-fruited plants have fruits structurally similar to paleotropical fruits dispersed by megafauna (mammals >103 kg), yet these dispersers were extinct in South America 10–15 Kyr BP. Anachronic dispersal systems are best explained by interactions with extinct animals and show impaired dispersal resulting in altered seed dispersal dynamics. Methodology/Principal Findings We introduce an operational definition of megafaunal fruits and perform a comparative analysis of 103 Neotropical fruit species fitting this dispersal mode. We define two megafaunal fruit types based on previous analyses of elephant fruits: fruits 4–10 cm in diameter with up to five large seeds, and fruits >10 cm diameter with numerous small seeds. Megafaunal fruits are well represented in unrelated families such as Sapotaceae, Fabaceae, Solanaceae, Apocynaceae, Malvaceae, Caryocaraceae, and Arecaceae and combine an overbuilt design (large fruit mass and size) with either a single or few (<3 seeds) extremely large seeds or many small seeds (usually >100 seeds). Within-family and within-genus contrasts between megafaunal and non-megafaunal groups of species indicate a marked difference in fruit diameter and fruit mass but less so for individual seed mass, with a significant trend for megafaunal fruits to have larger seeds and seediness. Conclusions/Significance Megafaunal fruits allow plants to circumvent the trade-off between seed size and dispersal by relying on frugivores able to disperse enormous seed loads over long-distances. Present-day seed dispersal by scatter-hoarding rodents, introduced livestock, runoff, flooding, gravity, and human-mediated dispersal allowed survival of megafauna-dependent fruit species after extinction of the major seed dispersers. Megafauna extinction had several potential consequences, such as a scale shift reducing the seed dispersal distances, increasingly clumped spatial patterns, reduced geographic ranges and limited genetic variation and increased among-population structuring. These effects could be extended to other plant species dispersed by large vertebrates in present-day, defaunated communities." @default.
• W2014322534 created "2016-06-24" @default.
• W2014322534 creator A5058629427 @default.
• W2014322534 creator A5065042718 @default.
• W2014322534 creator A5078919481 @default.
• W2014322534 date "2008-03-05" @default.
• W2014322534 modified "2023-10-13" @default.
• W2014322534 title "Seed Dispersal Anachronisms: Rethinking the Fruits Extinct Megafauna Ate" @default.
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• W2014322534 doi "https://doi.org/10.1371/journal.pone.0001745" @default.
• W2014322534 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2258420" @default.
• W2014322534 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18320062" @default.
• W2014322534 hasPublicationYear "2008" @default.
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