According to a recent research project, there are more females frogs than there are males in suburbia due to high estrogen levels in the local environment.
This phenomenon is only present in the suburban environments, because the male-female ratio remains normal in forest areas. And it seems that there are quite a few factors that have led to this estrogen overload in suburbia.
Firstly, those perfect green suburban lawns are causing more damage that they might appear to. In order to maintain the lush green color of the lawns, clover is integrated alongside the grass. And clover contains a high concentration of phytoestrogens, which are the plant version of estrogen, they predispose the frogs to this shift towards a female majority.
Another factor is the estrogen present in the waste from the suburban environment, due to contraceptives that are being used by the women, that eventually makes its way into the soil and the ponds and then to the frogs.
Furthermore, it seems that the pesticides and the herbicides used to keep gardens perfect also affect the frogs and make the number of females increase considerably, because they affect the hormonal balance of the frogs.
The study that made this concerning discovery was published in the scientific journal Proceedings of the National Academy of Sciences and it seems that it has actually signaled the need for further research on this particular matter, because it might be affecting much more species than frogs.
“In suburban ponds, the proportion of females born was almost twice that of frog populations in forested ponds.The fact that we saw such clear evidence was astonishing.” said Yale University researcher Max Lambert, one of the authors of the study.
This is quite the unexpected adaptation to the local environment of suburbia, and this matter needs to be addressed as soon as possible, because the implications it might have on the local fauna could reach concerning proportions.
This study was based on tests conducted in the Connecticut suburbia. Therefore, future research will include other suburban environments in order to compare the results.
However, the matter of high estrogen concentrations in the environment and the effects it might have on the flora and fauna has already been corroborated by previous research that found that the estrogen was causing male fish to produce eggs.
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