What Is a Blue Poison Dart Frog Niche?
The word niche refers to how a population of organisms fits into a specific environment. This can include the organism's habitat, food sources, predators and general impact on the ecosystem where it lives. The niche of an individual species, like that of the blue poison dart frog, is very specific and often an essential part of a fully functioning ecosystem.
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Geography
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Blue poison dart frogs are restricted to a few isolated sections of the South American nation of Suriname. More specifically, blue poison dart frogs can only be found in small patches of rain forest in the Sipaliwini savanna region in the southern part of Suriname. This extremely limited range makes the blue poison dart frog a relict species, according to the National Aquarium Baltimore.
Habitat
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The habitat of the blue poison dart frog differs significantly from its surrounding area. Blue poison dart frogs live in rain forests surrounded by areas of savanna. The neighboring savanna is dry, while the patches of forest remain very wet and humid. Blue poison dart frogs require habitats of high moisture, preferring to live in dark areas near streams.
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Diet
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Blue poison dart frogs are insectivorous and spend their days foraging for small insects and arthropods. Their diet is primarily composed of ants, beetles, termites, spiders, mites, flies and whatever other small insects that they can find in moist leaf litter. The blue poison dart frog's toxic skin secretions--from which it derives its common name--come from the diet that it eats. The toxins are found in the insects that the frog eats, and are absorbed into its skin. Captive blue poison dart frogs that are not fed these toxin-containing insects are not poisonous.
Predation
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Due to their powerful skin toxins that are capable of paralyzing or killing attackers and their bright warning coloration, adult blue poison dart frogs have few natural predators. Some species of snakes and large spiders can withstand the frog's poison skin, however, and these animals serve as the blue poison dart frog's primary predators. Blue poison dart frog tadpoles are eaten by snakes and dragonfly larvae. Tadpoles are made more vulnerable to predation by their lack of skin toxins.
Ecological Impact
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Due to the small size and isolation of the ecosystem in which the blue poison dart frogs reside, any changes in population of any animal could have enormous ecological impact. Blue poison dart frogs are important predators for a number of small insect species. Changes in the frog population could be potentially disastrous for their delicate rain forest habitat's food web, according to the University of Michigan Museum of Zoology.
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