That said, climate change is more of a future threat for wild bees. Pesticides, herbicides, and fungicides as well as habitat loss from human use (agriculture, residential) are the main current threats to bee loss. Climate change is being added on top of these issues.
Some plants don’t require direct pollination, like tomatoes. However, several studies have shown that increased heat results in dropped production in tomatoes: http://www.ncbi.nlm.nih.gov/pubmed/16497700
“METS did not cause a significant change in biomass, the number of flowers, or the number of pollen grains produced, but there was a significant decrease in the number of fruit set, pollen viability and the number of pollen grains released.”
“When temperatures rise above 85 to 90 degrees F (depending on humidity) during the day and 75 degrees F at night, pollen will become unviable.”
So, right now in Texas, my tomato plants are alive and look healthy, but their flowers are not producing at all. Climate change will cause the more agriculturally productive areas of the world to become like Texas is now.
Any grassy area in my region of the country that hasn’t received artificial watering looks a dull tannish-yellow right now. Several places in the dividers along highways have caught fire, and you can see the blackened scorch marks remaining. Yesterday, I saw a city services truck pouring water in one spot alongside a street from a 4 inch hose. That will help that one spot for about a week.
Many thanks for informing and clarifying the Climate Change threat to these vital pollinators, who work so hard in our food chain . Under pressure from many sides, the climate change threat clearly identified in this video. Appreciated, and I love growing tomatoes too.
The clip itself leaves the question of whether or not changes in flowering time and bee arrival will have an adverse effect. The clip also indicates that the problem might be the flowering time happening before the bee arrival, when the reverse might be more of a problem:
http://www.theguardian.com/environment/2014/nov/06/climate-change-is-disrupting-flower-pollination-research-shows
“New research reveals that rising temperatures are causing bees to fly before flowers have bloomed, making pollination less likely”
Another possible problem is habitat loss from climate change, where the bees do not migrate in time and drop in populations due to heat:
http://www.theguardian.com/environment/2015/jul/09/bumblebee-habitat-shrinking-europe-north-america-climate-change-study
That said, climate change is more of a future threat for wild bees. Pesticides, herbicides, and fungicides as well as habitat loss from human use (agriculture, residential) are the main current threats to bee loss. Climate change is being added on top of these issues.
Some plants don’t require direct pollination, like tomatoes. However, several studies have shown that increased heat results in dropped production in tomatoes:
http://www.ncbi.nlm.nih.gov/pubmed/16497700
“METS did not cause a significant change in biomass, the number of flowers, or the number of pollen grains produced, but there was a significant decrease in the number of fruit set, pollen viability and the number of pollen grains released.”
This is corroborated by practical gardening:
http://bonnieplants.com/2011/07/tomato-plants-not-setting-fruit-heres-why/
“When temperatures rise above 85 to 90 degrees F (depending on humidity) during the day and 75 degrees F at night, pollen will become unviable.”
So, right now in Texas, my tomato plants are alive and look healthy, but their flowers are not producing at all. Climate change will cause the more agriculturally productive areas of the world to become like Texas is now.
Any grassy area in my region of the country that hasn’t received artificial watering looks a dull tannish-yellow right now. Several places in the dividers along highways have caught fire, and you can see the blackened scorch marks remaining. Yesterday, I saw a city services truck pouring water in one spot alongside a street from a 4 inch hose. That will help that one spot for about a week.
Many thanks for informing and clarifying the Climate Change threat to these vital pollinators, who work so hard in our food chain . Under pressure from many sides, the climate change threat clearly identified in this video. Appreciated, and I love growing tomatoes too.
Link to B.B.C on why we need to protect Bees:
http://www.bbc.co.uk/guides/zg4dwmn