Watch and listen to two recent talks given by Dr. Dominick DellaSala at the University of British Columbia (UNBC) Natural Resources and Environmental Studies Institute. Videos are available on the UNBC website, or click below to go directly to Dominick’s talks.
There are three types of rainforests: tropical, temperate, and boreal. Tropical rainforests are warm and very wet places found near the equator that receive some 60 to 160 inches rainfall evenly distributed throughout the year. In contrast, temperate and boreal rainforests are found at high latitudes (northern and southern hemispheres), generally near coastlines, and in very wet (40 to 100 inches or more) and cool (average annual temperature of 43- 52̊ F) places that receive up to a quarter of their annual rainfall in the summer, a time when other forest types are experiencing summer droughts. Boreal rainforests are found in northern latitudes and are at the cool end of the temperature spectrum, even cooler than temperate climates. While most of the world’s boreal forests are in dry climates, a small subset with coastal influences are wet enough to qualify as rainforests. Ecologists also have recognized them as rainforests, but the general public is unaware of this distinction or its importance.
Go to Yale Climate Connections to listen to commentary by Dominick DellaSala on how his daughter contracted Lyme disease from ticks, which may be spreading because of climate change.
Yale Climate Connections consists of 90-second stories about how people are responding to our warming world.
Umair Irfan, E&E News reporter
Published: Friday, July 28, 2017
The eight-legged bloodsuckers that spread Lyme disease are crawling farther north and infecting more people due to climate change, scientists report.
Rising average temperatures are making more parts of North America hospitable to the Ixodesticks that carry Lyme disease.
The infection’s range is expected to move northward into Canada by 250 to 500 kilometers (155 to 310 miles) by 2050, and the season for the disease may start up to two weeks earlier than it does now. Health officials report similar patterns in Europe.
And human-caused climate change is a major contributing factor, scientists say.
In a recent Jefferson Public Radio interview, Dr. Dominick DellaSala (co-editor of The Ecological Importance of Mixed- Severity Fires and editor-in-chief of the Encyclopedia of the Anthropocene) discusses how climate change aids the spread of Lyme disease.
In the interview, he states that the animals that normally carry ticks (deer, mice, etc.) are surviving through the warmer winters coupled by the lack of top predators. He goes on to say with the warmer weather, the ticks could start making way to more northern parts of the world like Canada and Scandinavia thus putting more people at risk to the disease.
You can listen to his interview here.
Climate change is NOT an environmental problem – new research has increasingly pointed to a link between climate change and the spread of vector-borne diseases like Lyme disease. The decision by the Trump administration to pull out of the Paris climate change accords is only going to increase the spread of diseases associated with a warming planet.
Related article: “How climate change helped Lyme disease invade America” (Vox)
Download the factsheet: Lyme Disease Spreading Due to Climate Change and Human Activities, by Dominick DellaSala, Ph.D.
By Dominick DellaSala
This Earth Day, I am giving thanks for the lingering effects of our cold-wet winter and the beautiful snow-capped mountains. Reservoirs are filling up, fisher-people are casting away in streams with hopes of bountiful catches, and kayakers are bucking the rapids again. We should all enjoy this wet winter that used to be the “norm,” while remembering that we have much work to do to make the climate safe for our children.
I would like to share my family’s story because it concerns all parents, hikers, hunters and other outdoor enthusiasts in the region.
In an open letter to the U.S. Senate and President Obama, 276 scientists expressed concern that current legislation in both the House and Senate would use fear and misunderstanding about wildland fires to suspend federal environmental protections to expedite logging and clearcutting of both post-fire wildlife habitat and unburned old forests on National Forest lands, removing most of the structure a forest ecosystem needs to properly function.
The proposed House and Senate legislation addresses the borrowing of funds from other programs to cover costs of fire suppression. However, both bills would increase funding for suppression of mostly backcountry fires in remote areas, and neither would focus on, or prioritize, protection of rural communities. The best available science has shown that effective home protection from wildland fire depends on “defensible space” work within approximately 100 feet of individual structures, and improving the fire resistance of the homes themselves. Unfortunately, neither bill recognizes the ecological costs of further suppressing fire in fire-adapted ecosystems.
Fifty-four scientists from nine countries, supported by prominent experts speaking at the Earth Summit in Rio, sent a letter to the Premier of British Columbia, Christy Clark, calling on her government to fully implement the agreements to protect the world renowned Great Bear Rainforest – announced more than six years ago. In the letter the emphasized the importance of implementing the agreements within the next year.
“Most of the rare old-growth rainforests outside of the tropics have been logged, making it imperative that we safeguard the Great Bear Rainforest – the largest remaining temperate rainforest of its kind,” said Dominick DellaSala, chief scientist of the Geos Institute and an expert on temperate and boreal rainforests, who initiated the letter. “Scientists are eager to have a model of conservation that can be replicated around the world, and while we have hope with the Great Bear agreement, six years later it remains an unfinished job,” he added.
In the letter, the scientists point out that the Great Bear Rainforest is one of the few remaining large blocks of comparatively unmodified landscapes left on earth. The region includes over a quarter of the Pacific Coastal rainforests of North America that provide habitat for spectacular wildlife like the Spirit Bear and wild salmon runs that are increasingly rare throughout the world. Currently, half of the Great Bear Rainforest remains open to logging, but the scientists’ recommendation built into the Great Bear Rainforest Agreements was to set aside 70 percent of the natural old-growth forest that has yet to be implemented.
Over 260 scientists sent a letter to the U.S. Senate and President Obama urging them to oppose two public lands logging bills, being promoted by the timber industry and their supporters in Congress, which the scientists say would be very destructive to forest ecosystems and wildlife on National Forests and other federal public forestlands. The bills, HR 2647 and S 1691, will not improve forest health or reduce fire risks by promoting widespread logging of ecologically rich post-fire “snag forest” and older forest in mostly remote areas of federal public forestlands.
Instead they would eliminate most environmental analysis, prevent enforcement of environmental laws by the courts, and markedly reduce public participation in forest management decisions on public forests. The role of the timber industry in federal forest management would also unfairly increase under the deceptive guise of promoting decision-making by “collaborative” groups.
The scientists urged Congress and the Administration to oppose the misguided bills, which “misrepresent scientific evidence,” and instead focus on “ways for the public to co-exist with fires burning safely in the backcountry.” They urged Senators and the President “to consider what the science is telling us: that post-fire habitats created by fire, including patches of severe fire, are ecological treasures rather than ecological catastrophes, and that post-fire logging does far more harm than good to public forests.”