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  •  The Bullfrogs and bluegills are allied (10+ / 0-)

    to crowd out our tiny native Oregon frogs.   There are even studies about how bluegills prefer to eat native frog tadpoles over bullfrog tadpoles.

    And the bluegills also eat the dragonfly larvae, which would ordinarily prey on the smaller bullfrog larvae (tadpoles).

    The native frogs' tadpoles mature much earlier in the year, so they are hopping by the time seasonal wetlands dry up.

    The bullfrogs need year-round ponds for their life-cycle.  This means that when seasonal wetlands are destroyed and "mitigated/replaced" with duck ponds, it's goodbye to native frog habitat and hello to bullfrog habitat.

    Orly, it isn't evidence just because you downloaded it from the internet.

    by 6412093 on Tue Apr 02, 2013 at 12:42:17 PM PDT

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    •  Yes! Too true! (8+ / 0-)

      A lot of people put ponds in around here too, thinking it's "natural", and scenic-looking. A few use them for livestock or irrigation, but mostly it's for ambience. You mention one of the downsides, the native frog decimation.

      Another is that ponds are lined, to prevent the water from draining away, so it sits there collecting runoff, and then evaporates it into the air. A lot of rainwater gets diverted away from groundwater that way, which is a serious problem where I live. All our water comes from aquifers which are being overdrawn, and not recharged adequately.

      Plus the biofiltration function of wetlands, sequestering or breaking down excess nutrients and pollutants.

      We need more seasonal wetlands and fewer ponds!

    •  Others have talked about problems with the bulls (4+ / 0-)

      being detrimental to their smaller native cousins but for some reason it doesn't seem to be a problem here in Missouri. Wetlands, ponds, lakes or rivers, you'll find bullfrogs living alongside lot's of other native species, and most of those smaller species actually outnumber the bullfrogs by large margins. It may be that the frog hunters have kept the bullfrog numbers in check. Not much meat on the legs of a spring peeper...........

      Just give me some truth. John Lennon

      by burnt out on Tue Apr 02, 2013 at 08:18:33 PM PDT

      [ Parent ]

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