Let’s start with the centerpiece of Thanksgiving dinner. Turkeys face a worrisome future as heat waves and hotter temperatures become increasingly common. In one case, studies on broiler hens found that “a poultry house put under a future climate change scenario exceeded critical temperature on 30 percent more occasions despite a 10 percent increase in ventilation.” And when the temps rise, turkeys don’t grow as big and could even die from heat exhaustion or heat stroke.
POTATOES AND SWEET POTATOES
As temperatures in potato-growing regions rise and rains become less reliable, farmers are trying to adapt to keep their harvests safe. But unless they can develop a heat-resistant variety , potato farmers will have a difficult time growing their crops and face tough choices about moving their farms.
There’s also a nutritional element in how climate change affects potatoes and other plants. Studies show that rising CO2 emissions alter the makeup of most plants, altering their nutritional value. Because of these genetic changes, foods like potatoes, pumpkins, and other crops will contain more starch and sugar and fewer nutritional minerals. Which is not such a sweet scenario.
The cranberry is no fan of extreme weather. Frosts and floods can cut yields, and heat waves can cause an unpleasant rot. With temperatures on the rise – 2015 is on track to be the hottest year on record – cranberry-growers are facing an uncertain future. We’ve already seen what could happen back in 2012, when an early spring and extreme heat meant cranberry production in Massachusetts dropped 23 million pounds in one year alone, enough to leave a bitter taste in the mouth.
Not everyone wants to go gluten-free these days, especially when there’s stuffing on the dinner table. Scientists project that warming temperatures mean yields of staple crops like wheat, corn, and rice will decline. Which is bad news for food-insecure nations that depend on them. More troubling still is that some hotter areas like Sub-Saharan Africa may have trouble growing these crops at all as production shifts to cooler climates.
Your typical pumpkin thrives with ample water and cool autumn temperatures. But with record droughts in California, one of the United States’ biggest pumpkin producers, farmers struggled to get their harvest ready for the season. On the other hand, too much water (in the form of floods) also spells bad news for pumpkins, as we saw in the 2009 shortage, squashing hopes for pumpkin pies. That year, Nestle, the leading manufacturer of canned pumpkin, even told customers there wouldn’t be enough canned pumpkin for Thanksgiving.
Wine is made from grapes, which are part of a plant group known as perennials. Perennials are planted once and last for years, yielding crops each harvest cycle, which makes them especially vulnerable to climate change.
When extreme weather occurs – which is happening more intensely and frequently in many parts of the world – you can’t simply relocate the grapes. Because they’re planted a single time with the intention of lasting many years, they’re essentially stuck wherever they’re planted. Grapes are also sensitive to temperature changes. When temperatures get too hot, the fruit starts to break down, spoiling the entire crop.
With the climate changing, there’s more to be concerned about this Thanksgiving than a visit with the in-laws – but the thing is, we can do something about it today. We don’t have to accept a future where our favorite foods are just too expensive or too hard to grow anymore.
Add your name to our petition calling for a strong global climate agreement, and together we can protect the foods – and plants, and animals, and people – we hold dear this Thanksgiving and the rest of the year.
Header image: © 2012 Tatyana A./Flickr cc by nc nd 2.0