Ecological Meltdown in Predator-Free Forest Fragments

@article{Terborgh2001EcologicalMI,
  title={Ecological Meltdown in Predator-Free Forest Fragments},
  author={John Terborgh and Lawrence Lopez and Percy N{\'u}{\~n}ez and Meenakshi Rao and Ghazala Shahabuddin and Gabriela Orihuela and Marcela Ferreira Riveros and Rafael Arévalo Ascanio and Gregory H. Adler and Thomas Lambert and Luis Balbas},
  journal={Science},
  year={2001},
  volume={294},
  pages={1923 - 1926}
}
The manner in which terrestrial ecosystems are regulated is controversial. [...] Key Result Predators of vertebrates are absent, and densities of rodents, howler monkeys, iguanas, and leaf-cutter ants are 10 to 100 times greater than on the nearby mainland, suggesting that predators normally limit their populations. The densities of seedlings and saplings of canopy trees are severely reduced on herbivore-affected islands, providing evidence of a trophic cascade unleashed in the absence of top-down regulation.Expand
Seed predation and seedling herbivory as factors in tree recruitment failure on predator-free forested islands
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INDIRECT EFFECTS OF A TOP PREDATOR ON A RAIN FOREST UNDERSTORY PLANT COMMUNITY
Tropical rain forests, some of the most diverse natural communities, have been characterized either as inherently stable or as extremely fragile. Theoretically, complex food webs allow forExpand
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Islands can serve as model systems for understanding how biological invasions affect community structure and ecosystem function. Here we show invasion by the alien crazy ant Anoplolepis gracilipesExpand
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There is a behaviorally mediated cascade such that owls on the island had a positive indirect effect on murrelet egg survival, adding to the wider recognition of the strength of risk effects to structure food webs, as well as highlighting the complex ways that marine and terrestrial food webs can intersect. Expand
Above and below ground impacts of terrestrial mammals and birds in a tropical forest
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Evidence is presented that loss of this functional group may result in increased tree seedling herbivory and altered nutrient regimes through changes in the abundance and guild structure of invertebrates, and illustrates the potential importance of vertebrate predators in both above and belowground food webs despite the biotic diversity and structural heterogeneity of the rainforest floor. Expand
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