Rapid collapse of a population of Dieffenbachia spp., plants used for tadpole-rearing by a poison-dart frog (Oophaga pumilio) in a Costa Rican rain forest

  title={Rapid collapse of a population of Dieffenbachia spp., plants used for tadpole-rearing by a poison-dart frog (Oophaga pumilio) in a Costa Rican rain forest},
  author={Mark J. McKone and Jonathan W. Moore and Christopher W. Harbison and Ian C. Holmen and Hillary C. Lyons and Kristine M. Nachbor and Julia L. Michalak and Maurine Neiman and Julia L. Nicol and George R. Wheeler},
  journal={Journal of Tropical Ecology},
  pages={615 - 619}
Abstract: Amphibian populations have been declining worldwide, with multiple potential causes. At La Selva field station in north-eastern Costa Rica, previous work has shown that populations of many amphibians have decreased significantly since the 1970s, especially in primary forest. Starting in 1998, we investigated one of the most common frog species at La Selva, the poison-dart frog Oophaga pumilio (= Dendrobates pumilio). In a survey of 50 plots of 100 m2 in 1998, adult frogs were 4.6… 
Assessing the role of habitat and species interactions in the population decline and detection bias of Neotropical leaf litter frogs in and around La Selva Biological Station, Costa Rica
The experimental surveys suggested that Neotropical leaf litter frog communities are difficult to detect when present and future studies should explicitly account for this detection bias to effectively monitor population trends.


Amphibian and reptile declines over 35 years at La Selva, Costa Rica
A systematic community-wide decline in populations of terrestrial amphibians at La Selva Biological Station, a protected old-growth lowland rainforest in lower Central America, is identified and declines are due to climate-driven reductions in the quantity of standing leaf litter, a critical microhabitat for amphibians and reptiles in this assemblage.
Comparisons of the Leaf Litter Herpetofauna in Abandoned Cacao Plantations and Primary Rain Forest in Costa Rica: Some Implications for Faunal Restoration1
Comparisons among three forest stands at the La Selva Biological Station, Costa Rica were made of biomass, abundance, richness, relative abundance, evenness and species overlap of herpetofauna
Additive threats from pathogens, climate and land-use change for global amphibian diversity
It is shown that the greatest proportions of species negatively affected by climate change are projected to be found in Africa, parts of northern South America and the Andes, and the areas harbouring the richest amphibian faunas are disproportionately more affected by one or multiple threat factors than areas with low richness.
Demographic Effects of Reproductive Resource Supplementation in a Territorial Frog, Dendrobates Pumilio
The population-level response suggests that bromeliad availability is limited and this resource is defended by males, and resource addition affected density.
Effects of collared peccary (Pecari tajacu) exclusion on leaf litter amphibians and reptiles in a Neotropical wet forest, Costa Rica
The results demonstrate that peccaries should be viewed not just as seed predators or ecosystem engineers for palms and pond-breeding amphibians, but also as important agents that affect leaf litter structure and abundance of terrestrial amphibians and reptiles.
Group dynamics, behavior, and current and historical abundance of peccaries in Costa Rica's Caribbean lowlands
Abstract The abundances and habitat preferences of peccaries in Neotropical forests are important to understand because these keystone species influence many aspects of the ecosystem. In the
Are we in the midst of the sixth mass extinction? A view from the world of amphibians
A general message from amphibians is that the authors may have little time to stave off a potential mass extinction, and it is shown that salamanders on tropical mountains are particularly at risk.
Effects of reproductive resource supplementation on space-use patterns in Dendrobates pumilio
The results indicate that the density increase observed on bromeliad-addition plots was accommodated by frogs utilizing previously unoccupied space, indicating the absence of home-range defense.
The omnivorous collared peccary negates an insectivore-generated trophic cascade in Costa Rican wet tropical forest understorey
This is the first study, to the authors' knowledge, to demonstrate that the non-trophic activity of an omnivorous ungulate can reverse a trophic cascade.
La Selva: ecology and natural history of a neotropical rain forest.
La Selva, a nature reserve and field station in Costa Rica, is one of the most intensively studied and best-understood tropical field sites in the world. For over 30 years, La Selva has been a major