Stormwater wetlands can function as ecological traps for urban frogs

Ecological Applications : a Publication of the Ecological Society of America
Michael SieversRobin Hale

Abstract

Around cities, natural wetlands are rapidly being destroyed and replaced with wetlands constructed to treat stormwater. Although the intended purpose of these wetlands is to manage urban stormwater, they are inhabited by wildlife that might be exposed to contaminants. These effects will be exacerbated if animals are unable to differentiate between stormwater treatment wetlands of varying quality and some function as "ecological traps" (i.e., habitats that animals prefer despite fitness being lower than in other habitats). To examine if urban stormwater wetlands can be ecological traps for frogs, we tested if survival, metamorphosis-related measures, and predator avoidance behaviors of frogs differed within mesocosms that simulated stormwater wetlands with different contaminant levels, and paired this with a natural oviposition experiment to assess breeding-site preferences. We provide the first empirical evidence that these wetlands can function as ecological traps for frogs. Tadpoles had lower survival and were less responsive to predator olfactory cues when raised in more polluted stormwater wetlands, but also reached metamorphosis earlier and at a larger size. A greater size at metamorphosis was likely a result of increased ...Continue Reading

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Citations

Aug 29, 2018·Conservation Biology : the Journal of the Society for Conservation Biology·Michael SieversKirsten M Parris
Jun 28, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Carolyn M RodakJason R Vogel
Jun 21, 2019·Ecological Applications : a Publication of the Ecological Society of America·Luke T BarrettStephen E Swearer
Jan 3, 2022·The Science of the Total Environment·Elizabeth C LoweMariana Mayer Pinto

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