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Ecological Meltdown in Predator-Free Forest Fragments
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
The Island Syndrome in Rodent Populations
It is suggested that the intensity or absense of density-depressing factors is primarily responsible for the area effect and serves as a principal factor differentiating island from mainland populations of rodents. Expand
Small mammals on Massachusetts islands: the use of probability functions in clarifying biogeographic relationships
Logistic regression has several advantages over linear discriminant function analysis, and it is suggested that it may be useful in other ecological studies and in the preservation of endangered species. Expand
Canine visceral leishmaniasis: dog infectivity to sand flies from non-endemic areas.
It is hypothesised that the presence of infected dogs in areas where L shannoni or L youngi occur could initiate new endemic cycles of VL in both South and North America. Expand
Detection of Leishmania (Viannia) braziliensis complex in wild mammals from Colombian coffee plantations by PCR and DNA hybridization.
The small mammal fauna of coffee plantations in SW Colombia was surveyed to determine which of the species present were infected with parasites of the Leishmania (Viannia) braziliensis complex andExpand
Dynamics of Leishmania chagasi infection in small mammals of the undisturbed and degraded tropical dry forests of northern Colombia.
The infection rate with Leishmania chagasi and the population dynamics of small mammals were studied in an undisturbed forest reserve and an area of highly degraded forest in northern Colombia, both endemic for visceral leishmaniasis. Expand
Diversity of arbuscular mycorrhizal fungi across a fragmented forest in Panama: insular spore communities differ from mainland communities
It is suggested that the convergence of common species found in AMF spore communities in soils of similar forest sizes was a result of forest fragmentation, and may result in differential survival of tree seedlings regenerating on islands versus mainland. Expand
Fruit and Seed Exploitation by Central American Spiny Rats, Proechimys semispinosus
Fruits from trees in the Moraceae were consumed entirely, including the seeds, and spiny rats preferentially ate seeds of several large‐seeded species and primarily peeled off the mesocarp or aril. Expand
Impacts of Resource Abundance on Populations of a Tropical Forest Rodent
Test populations of Proechimys semispinosus (Central American spiny rat) were provisioned with fresh native fruits for 6 mo to test the hypothesis that populations of frugivorous rodents in seasonal Neotropical forests are not limited by food during the season of greatest resource abundance, and increased densities were due to increased production and recruitment of young. Expand
Seasonal dispersal of arbuscular mycorrhizal fungi by spiny rats in a neotropical forest
Examination of the influence of both availability of other food resources and season on the consumption and subsequent dispersal of AMF spores by Proechimys semispinosus from seven island populations located in Gatun Lake, Panama over a 13-month period suggested this rodent may influence tree seedling survival by making spores of their mutualistic fungi available throughout the rainy season. Expand