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Insect Die-off: Even Common Species Are Becoming Rare (sciencedaily.com)

Scientists at Senckenberg Nature Research Society and Technical University of Munich (TUM) have been able to show that currently widespread insects are threatened with a serious decline in species diversity in the near future. From the report: The research team lists the fragmentation of habitats and the intensification of agriculture as reasons for the decline of these "generalists." According to the study, published today in the scientific journal Biological Conservation, the genetic diversity among the examined butterfly species is also expected to decline sharply in the future -- as a result, the insects will become more sensitive to environmental changes.

12 of 127 comments (clear)

  1. Sad news on a beautiful spring day... by Kenja · · Score: 3, Insightful

    ... what do you mean it's winter?

    --

    "Have you ever thought about just turning off the TV, sitting down with your kids, and hitting them?"
  2. Then what will real programmers use? by jfdavis668 · · Score: 4, Funny

    If there are no more butterflies, what will real programmers use? :https://xkcd.com/378/

  3. What can you do to help? by JoshuaZ · · Score: 5, Insightful

    Since part of this is caused by an increase in agriculture, a big one is to eat less meat. This doesn't mean be a complete vegetarian, but just eat less meat and more non-meat options. The acreage used for meat as a food is much much higher than the same for most vegetarian options https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1097070.pdf and this also helps shrink one's carbon footprint http://shrinkthatfootprint.com/food-carbon-footprint-diet. Given that many meat substitutes are cheap, this can pay off nicely. Moreover, in the US now there are many more genuinely tasty vegetarian options than there used to be both in terms of store-bought items and in terms of available high quality recipes. I remember when I was a little kid and we went to my vegetarian aunt's for Thanksgiving, and it was awful. The situation now is very different.

    1. Re:What can you do to help? by JaredOfEuropa · · Score: 3, Insightful

      Is acreage used for meat all that detrimental to insects? I would have thought that growing food crops is worse, what with all the pesticides.

      --
      If construction was anything like programming, an incorrectly fitted lock would bring down the entire building...
    2. Re:What can you do to help? by Anonymice · · Score: 3, Insightful

      The overwhelming majority of livestock are raised on said crops themselves.

    3. Re:What can you do to help? by tlhIngan · · Score: 3, Informative

      They shouldn't be eating any "crops" except what they can graze. If you feed animals corn, soy, etc. they will become just as unhealthy as people who eat that kind of food.

      Most corn harvested in the US goes to feed for animals, actually. Free range animals graze and are often "grass fed", but the vast majority of meat is at factory farms where the cows don't graze but are fed troughs of corn to fatten them up quickly and slaughter.

      The demand for meat is high enough that free range beef will not satisfy demand and would case prices to spike (not that beef is cheap these days - it's still hitting all time high prices)

  4. Where do they live? by amiga3D · · Score: 3, Funny

    Not in Middle Georgia at least. I'm inundated by bugs of all types. My car is covered in them from driving at night, they fly all around my yard, they eat the fruit on my trees, my vegetables. They need to come here and collect all they want, free of charge. For a fee I'll box a swarm up and ship it to them.

  5. Re:Sad it's happening to butterflies by Z00L00K · · Score: 4, Insightful

    I have a feeling that one factor is that contributes is the lack of small farms with mixed livestock grazing the land and dropping fresh manure at random.

    A number of butterflies are also thriving on plants that we consider weed (not the type you smoke) like nettles. And nettles thrive where the soil is highly fertilized - preferably by natural manure.

    But today cattle are often on large farms where the manure handling is strictly regulated.

    Overall the problem is that farming is getting highly specialized instead of diversified and that causes a monoculture of plant life with very little other vegetation permitted since it will contaminate the crop.

    --
    If builders built buildings the way programmers wrote programs, then the first woodpecker would destroy civilization.
  6. Fireflies by Nidi62 · · Score: 3, Interesting

    I've noticed that during the summers growing up even just 2 decades ago fireflies were all over the place. Now they are a rare sight. Sadly though, whatever has done in the fireflies hasn't done much to the mosquitoes around here.

    --
    The only thing necessary for evil to triumph is for it to be pitted against a slightly greater evil
    1. Re:Fireflies by Anonymous Coward · · Score: 3, Informative

      Or yeah.http://science.sciencemag.org/content/356/6345/1393
      Country-specific effects of neonicotinoid pesticides on honey bees and wild bees
      Science 30 Jun 2017:
      Vol. 356, Issue 6345, pp. 1393-1395
      DOI: 10.1126/science.aaa1190

      Damage confirmed
      Early studies of the impacts of neonicotinoid insecticides on insect pollinators indicated considerable harm. However, lingering criticism was that the studies did not represent field-realistic levels of the chemicals or prevailing environmental conditions. Two studies, conducted on different crops and on two continents, now substantiate that neonicotinoids diminish bee health (see the Perspective by Kerr). Tsvetkov et al. find that bees near corn crops are exposed to neonicotinoids for 3 to 4 months via nontarget pollen, resulting in decreased survival and immune responses, especially when coexposed to a commonly used agrochemical fungicide. Woodcock et al., in a multicounty experiment on rapeseed in Europe, find that neonicotinoid exposure from several nontarget sources reduces overwintering success and colony reproduction in both honeybees and wild bees. These field results confirm that neonicotinoids negatively affect pollinator health under realistic agricultural conditions.

  7. Re:Sad it's happening to butterflies by hey! · · Score: 5, Insightful

    No danger there. The mosquito species that commonly bite humans are the ones that are adapted to living in proximity of humans. What is habitat destruction for other species is habitat creation for them.

    For example Culex pipiens is so well adapted to coexiting with humans its common name is "house mosquito". Clearly it didn't evolve to live around humans. In its natural habitat it laid its eggs in mucky forest puddles and fed on birds. Wipe out the forest and replace it with a suburban subdivision and you actually increase its egg laying habitat: ditches, poorly draining gutters, catch basins and so on. Populations have developed a taste for human blood too -- evolution in action -- and because it still bites birds is a perfect vector for many viral disease that cross from avian to human populations.

    Something like this always happens when there is widespread habitat disruption: most species populations are harmed but a small number of them hit the jackpot: what biologists call "weedy species". Mice, voles and pikas are all very similar small woodland creatures, but its ability to adapt to human activities transforms the mouse in some situation into a nightmarish plague.

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    Post may contain irony: discontinue use if experiencing mood swings, nausea or elevated blood pressure.
  8. Re:The planet is dying by riverat1 · · Score: 3, Insightful

    The planet is not in a death dive. It may be that human civilization is and we may take a lot of species with us but after we're gone give the planet a couple million years of evolution and it will be just as alive as it was before humans arrived on the scene.