Through the process of photosynthesis, trees take in water and carbon dioxide and, in the presence of sunlight, produce oxygen. A new report in Nature Climate Change shows that Northeast forests are starting this process earlier in the spring and extending further into the fall, adjusting their phenology based on warmer temperatures. The short term result of these changes is an increased uptake of carbon dioxide from the atmosphere. However, the long term results are not fully known. Read more
Archive for the ‘News’ Category
Curious about trends and anomalies from the spring data? If you have been tracking red maples or sugar maples, your observations are part of the Northeast Green Wave. Learn how scientists are using the information from this and other campaigns in a Nature’s Notebook Webinar on Tuesday, June 10th from 2-3:30PM. Advanced registration is required.
Elissa Koskela, an assistant coordinator of the Signs of the Seasons program coordinated by the University of Maine Cooperative Extension and the Maine Sea Grant, wrote an opinion piece for the Bangor Daily News titled “Wondering how climate change is affecting us now? Citizen scientists have a role to play.” Signs of the Seasons is a phenology program that helps scientists document the local effects of global climate change through the work of volunteer citizen scientists who are trained to record the seasonal changes of common plants and animals in their communities.
Before the age of soil thermometers, farmers used clues from nature to determine the appropriate times to plant. Their observations have transformed into local lore that can still be of use today. Species with temperature dependent phenophases can signal appropriate times to plant crops or take action for pest management. Read more
Research being conducted through Maine’s Sustainability Solutions Initiative was cited in the the newly released National Climate Assessment report, which found global warming is affecting life in Maine and other New England states.
Under the “Selected Adaptation Efforts” of the Northeast section of the report, it reads:
“Officials in coastal Maine are working with the statewide Sustainability Solutions Initiative to identify how culverts that carry stormwater can be maintained and improved, in order to increase resiliency to more frequent extreme precipitation events. This includes actions such as using larger culverts to carry water from major storms.”
The paragraph is referring to a project being conducted by SSI researchers Shaleen Jain, an associate professor of civil engineering; Esperanza Stancioff, an educator with UMaine Cooperative Extension and Maine Sea Grant; and Alexander Gray, a research assistant.
The “Helping Communities Weather the Storm” project aims to help Maine communities better understand and prepare for the potential local impacts of climate change.
The research is part of Maine’s Sustainability Solutions Initiative, a program of the Senator George J. Mitchell Center, which is supported by National Science Foundation award EPS-0904155 to Maine EPSCoR at the University of Maine.
According to the National Climate Assessment, plant and animal species are used by humans for food, infrastructure and medicine, in addition to the roles they play as members of an ecosystem. Increases in temperature and varying rain patterns modify relationships between organisms that have traditionally coexisted. Scientists have already documented mismatches in symbiotic species that did not alter the timing of their phenophases in the same manner. Data also show that native species are extending their habitat ranges north and to higher elevations. At the same time, invasive species are migrating into new locations. All of these shifts will have significant effects on ecosystem health and will alter our ability to utilize these species as we once did.
The recently released National Climate Assessment details both observed changes and predicted outcomes for the US over the next hundred years. Each section contains key messages that summarize the findings for that topic. Information on seasonal changes can be found in the section on Ecosystems and Biodiversity. It is also possible to examine the overall effects of climate change on our region in the Northeast section.
Your observations assist scientists in measuring the extent of the adjustments made by specific organisms. A nationwide database, such as Nature’s Notebook, helps to increase our understanding of shifts in phenology by giving scientists the ability to quantify real change. Gathering evidence to develop a knowledge base is the first step when creating policies that will benefit Earth’s inhabitants.
Waiting to see a ruby-throated hummingbird at your Signs of the Seasons site in New England? They migrated south last fall as the daylight hours were reduced and food became scarce. Now, as sources of nectar blossom this spring, the hummingbirds are returning to their northern breeding grounds.
A worldwide trend of earlier spring has researchers examining changes in the timing of plant phenophases and teasing apart possible causes. Long term studies of flowering plants show shifted bloom patterns, earlier flowers in the spring for some species and later blooms in the fall for others. Warming has been identified as a factor, but new studies suggest that increased levels of carbon dioxide in the atmosphere and the availability of ground water also have an impact. Read more.
Signs of the Seasons added three amphibian species in 2014: American toad, spring peeper, and wood frog. While camouflage makes these species challenging to spot, distinctive calls allow observers to identify them using sound. Hear their calls and practice identification at the USGS Frog Quizzes page. Use the “Frog Call Lookup” section to play audio clips from each species.
Predictions for future climate change may be varied, but the data suggest that the maple tapping season is happening earlier each year. This, however, may be an oversimplification of the trend. UMaine graduate student Jenny Shrum is looking deeper to determine connections between weather conditions and the rate of sap flow. An understanding of these relationships may help syrup producers to better predict the best time to tap, allowing syrup production to continue even as conditions change. Read more.