Nobody wants to live in a noisy building near a highway or airport. It’s the same for insects and pollinating birds that escape from prolonged noisy trees that seem to retain results even long after the silence has returned.It’s the result of a study, for fifteen years, I noticed a plot of tree land exposed to constant noise pollution. In these places the authors note the impoverishment of vegetation diversity and a series of lasting environmental impacts, despite the suppression of the noise.
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Making,Roads or buildings … noise doesn’t just interfere with them Plant diversity, but its negative impact could last long after the silence returns. The Related to human activities has increased dramatically since the middle of the last century, a situation that has prompted biologists to examine their effect on And plants. Previous studies have already examined the short-term effects of noise – which repel pollinators like insects , But few researchers have investigated the long-term effects. American scientists studied Exposed for 15 years to high man-made noise in New Mexico.
According to the study, published Wednesday in , They found a 75% reduction in pine seedlings in noisy areas compared to . Then they examined the areas where the noise pollution had disappeared to see how the trees would react, assuming that these populations (juniper and pine trees) would recover quickly once the clematis that had sprouted the seeds returned. Silence again.
Noise pollution has lasting impacts on biodiversity
But, on the contrary, they note a long-term decrease in the number of new shoots, which isRefusing to return to these sites. ” The effects of man-made noise pollution permeate the architecture of these forest communitiesClint Francis, a biologist at California Polytechnic University, co-author of the study, commented. What we see is that eliminating noise does not necessarily mean resumption of environmental functions. ».
Because ofPollinators can stay away even if the noise stops: Animals like the maple bird are sensitive to noise and learn to avoid certain areas “Another co-author of the study, Jennifer Phillips, explained.
« Animals may take time to rediscover these previously very noisy areas and we don’t know for how long And she requested that noise pollution be taken into account when assessing the effects of urbanization on nature. ” I really think that noise pollution and other perceptual pollutants like light are not being taken into sufficient consideration ».
Noise pollution also affects plants!
Article by Bruno Scala, published on 23 March 2012
Noise pollution, of human origin, was known to affect some animals. Scientists have just shown that it also has an effect on plants. Indirect but real. In this case, noise can enhance pollination but reduce dispersal of some seeds.
Sure enough, plants don’t have an ear. However, it is very likely that they were affected by noise pollution of human origin. But not directly. Animals that interact with plants may experience behavioral changes in response, Which has an effect on themselves.
Because animals have ears or at least a well-developed auditory system in general. This has been proven for a long time nowIt has a harmful effect on many Marine life, especially mammals Thanks to th Of sounds.
The indirect effect of noise on pollination and seed propagation
Outside of water, animals are also affected by human noise. This is especially the caseIt is known that they have Very sophisticated. However, some of them, by interacting with plants, do a lot : Seed dispersal, pollination … US researchers have shown that noise has an indirect effect on these environmental services, and thus on the plant groups involved.
Two birds caught the attention of researchers: the black-throated hummingbird (Archilochus of Alexandri(And rub Jay)Aphelocoma californica). While the former is a pollinator, the latter feeds on seeds and is fond of pine seeds. Pinus edulis, Which inhabits the remarkably arid ecosystems of New Mexico. The San Juan Basin, in the northwest of the state, is severely pierced by more than 20,000Which extracts natural gas and Fluids from the ground produce a continuous hum throughout the area. This is where the scientists conducted their experiments.
Free environmental services
Previous studies have shown that hummingbirds are more attracted to noisy environments while coyotes tend to shy away. So it is natural that in these environments, pollination is done by a. Alexandri It is preferred during seed propagation by A. californica Weakens. That’s what the researchers noticed, they explain .
TheOf human origin has an indirect effect on the environmental services provided by animals, such as Or the Whether it is positive or negative. In the case of seed dispersal, these inconveniences have repercussions on landscape architecture and on tree populations in particular. Nevertheless, it is a free ecological service that humans seem willing to give up.