Browsing by Subject "Global warming"

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Effect of Temperature on Habitat Use by Moose in Voyageurs National Park in the Summer
(University of Minnesota Duluth, 2015) Moen, Ronald; Joyce, Michael; Windels, Steven K
Moose (Alces alces) are an integral part of biological processes and a favorite sight of visitors to Voyageurs National Park (VNP). In the face of global climate change moose may also become a bellwether species for the persistence of northern species in VNP and the surrounding area. Climate change will affect national parks like VNP in many ways, ranging from changes in vegetation and possible loss of wildlife species to altered visitation rates by people. Minnesota is at the southern edge of moose distribution. Climate change predictions are for a 3o to 4o C increase in average summer temperatures by 2100, which would result in an increased number of summer days during which moose would be heat stressed. We deployed GPS collars on moose in VNP to evaluate changes in habitat use and activity as related to fine-scale changes in ambient temperature. We captured and radiocollared 21 moose by aerial darting or net-gunning. We measured black globe temperatures in habitats across VNP. The annual Minimum Convex Polygon home range area was about 15 km2, while seasonal home ranges were about 10 km2. Home range size was slightly less than in adjoining areas of northeast Minnesota. There was no difference in proportional cover type in the home range among annual, winter, and summer home ranges, and cover type use was similar to cover type use by moose in northeast Minnesota. Wet bog and wet marsh/fen cover types were preferred in hot summer temperatures, while open water was not used very much, with less than 1% of locations in water when temperatures were above 30 C. Use of almost all cover types was similar whether temperature, dew point, or heat index were used as the metric. For future analysis of cover type use ambient or black globe temperature should be an adequate metric. Habitats that are of most use to moose in hot temperatures have a wet substrate and some canopy cover during the day. At night moose seemed to be less limited by heat dissipation because of colder temperatures and the lack of solar radiation. Monitoring the population status of moose at Voyageurs National Park is of critical importance in order to make contrasts with the declining moose populations in other regions of Minnesota.
Encroaching Tides: How Sea Level Rise and Tidal Flooding Threaten U.S. East and Gulf Coast Communities over the Next 30 Years
(2014) Spanger-Siegfried, Erika; Fitzpatrick, Melanie; Dahl, Kristina
This recent study examined coastal flooding along the Eastern and Gulf coasts of the US, and did not include the Great Lakes. However, the report concludes that extreme weather events and floods are occurring nationwide, and that other coastal communities are also at higher risk. Coastal communities and states, and the nation as a whole, need to prepare for near-term changes in tidal flooding, while working hard to minimize longer-term losses through efforts to both adapt to these changes and limit their extent. The report outlines steps to ensure more resilient coastal communities, which are extracted and reproduced below. “BUILDING COASTAL RESILIENCE IS A LOCAL IMPERATIVE . . . Over the next few decades—the time frame of our analysis—changes set in motion by our past and present heat-trapping emissions will largely drive the pace of sea level rise. The lag of several decades between the release of carbon into the atmosphere and the response of the ocean means that more tidal flooding is virtually guaranteed, and that communities need to act with urgency. Locally, there are many things we can do to help ensure enduring coastal communities, including: • Upgrade the built infrastructure in harm’s way. With help, communities can prioritize and incentivize flood-proofing of homes, neighborhoods, and key infrastructure, such as sewer and stormwater systems. • Avoid putting anything new in harm’s way. Communities can use a range of regulatory and planning tools to curtail new development in coastal locations subject to tidal flooding now and in the future. • Consider the risks and benefits of adaptation measures. Some measures to limit the impact of coastal flooding can provide multiple benefits, while others can alter shoreline dynamics and damage neighboring areas and ecosystems. Decision makers need to ensure that a rush to protect coastal communities builds broad-based resilience, rather than helping some areas while putting others at risk. • Develop a long-term vision. Communities that create a vision for both near-term protection and long-term resilience in the face of sea level rise—and craft plans for building better, safer, and more equitably—will be best positioned to thrive in the years ahead. . . . AND A NATIONAL ONE But local communities can’t go it alone—coastal challenges are too great, the costs are too steep, and too many people are at risk. Instead, we need a coordinated, well-funded national response to our country’s coastal vulnerability involving federal, state, and local collaboration. Federal and state governments can help build local resilience by supporting, incentivizing, regulating, and even mandating action. They can: • Build and maintain a coastal monitoring and data-sharing system equal to the threat. Key federal agencies can sustain and expand efforts to monitor and project sea level rise and flooding, and ensure that local decision makers have access to the data. • Encourage or mandate the use of good scientific information. Agencies can require that communities and other applicants for state and federal funds use the best available data, and demonstrate that new development and redevelopment projects can withstand projected tidal flooding and storm surges. • Support planning. More federal support for state and local planning and collaboration can accelerate efforts to build coastal resilience. • Mobilize funding. Adapting to sea level rise will require major, sustained investment. Federal policy makers need to develop new funding sources to support resilience-building efforts at the state and local level. • Improve risk management. The true costs of living on the coast are not reflected in the price of flood insurance and other risk management tools. But big increases in the cost of insurance are hard for many to bear. Federal incentives to reduce some property owners’ risks and costs can aid the transition to a more solvent flood insurance system and better risk management. • Ensure equitable investments. Federal investments in coastal resilience can prioritize households and communities with the greatest needs. • Reduce heat-trapping emissions. A near-term increase in sea level rise and tidal flooding may be locked in, but changes later this century and beyond are not fixed. To slow the rate of sea level rise—and enable coastal communities to adapt in affordable and manageable ways— we must reduce our global warming emissions.”
Episode 1 (Season 3) Growing Produce in a Changing Climate with Kenny Blumenfeld: What's Killing My Kale?
(2020-03-30) Klodd, Annie; Hoidal, Natalie; Blumenfeld, Kenny
In this episode Natalie interviewed DNR senior climatologist Kenny Blumenfeld about how our climate has changed over the last 100 years in Minnesota, and predictions for future changes.
Episode 2 (Season 3) Climate Change Adaptation at Loon Organics Farm: What's Killing My Kale?
(2020-03-30) Klodd, Annie; Hoidal, Natalie; Frerichs, Laura
Annie interviewed Laura Frerichs from Loon Organics in Hutchinson farm about the impacts she's seeing on her diversified vegetable farm, and strategies she and her husband Adam are using for adaptation.
Episode 3 (Season 3) Climate Change Adaptation at Open Hands Farm: What's Killing My Kale?
(2020-03-30) Klodd, Annie; Hoidal, Natalie; Johnson, Erin; Doherty, Ben
Natalie interviewed Erin Johnson and Ben Doherty from Open Hands Farm in Northfield about climate impacts on their diversified vegetable farm and adaptation strategies.
Episode 4 (Season 3) Climate Change Adaptation at Little Hill Berry Farm: What's Killing My Kale?
(2020-03-30) Klodd, Annie; Hoidal, Natalie; Wills, Aaron
Annie interviewed Aaron Wills from Little Hill Berry Farm in Northfield about climate impacts on perennial fruit production.
The Impacts of Climate Change on Tribal Traditional Foods
(2013) Lynn, Kathy; Daigle, John; Hoffman, Jennie; Lake, Frank; Michelle, Natalie; Ranco, Darren; Viles, Carson; Voggesser, Garrit; Williams, Paul
The tribal communities noted in this very interesting paper are from the Pacific Northwest. This paper is included in the study even though it is not specifically focused on Minnesota’s coastal resources, but is relevant in discussing modes and strategies that tribal leaders may pursue to address the impacts of climate change. Mention is made of wild rice and Ojibwe communities in Minnesota. Key points are extracted and reproduced below. Abstract: “American Indian and Alaska Native tribes are uniquely affected by climate change. Indigenous peoples have depended on a wide variety of native fungi, plant and animal species for food, medicine, ceremonies, community and economic health for countless generations. Climate change stands to impact the species and ecosystems that constitute tribal traditional foods that are vital to tribal culture, economy and traditional ways of life. This paper examines the impacts of climate change on tribal traditional foods by providing cultural context for the importance of traditional foods to tribal culture, recognizing that tribal access to traditional food resources is strongly influenced by the legal and regulatory relationship with the federal government, and examining the multi-faceted relationship that tribes have with places, ecological processes and species. Tribal participation in local, regional and national climate change adaption strategies, with a focus on food-based resources, can inform and strengthen the ability of both tribes and other governmental resource managers to address and adapt to climate change impacts. "American Indian and Alaska Native tribes face unique and disproportionate challenges from climate change that are not yet widely understood in academic or policy arenas. This paper explores one of these challenges in particular—the impact of climate change on traditional foods and the reality that 1) tribal access to resources is strongly influenced by the legal and regulatory relationship that tribes have with the federal government, and 2) tribes have a unique and multi-faceted relationship with places, ecological processes, and species. These frameworks shape tribal responses to climate change. “Water is held sacred by many indigenous peoples (Cozzetto et al.), and considered by some to be a traditional food... Climate change impacts on water temperature and availability will also have significant impacts on tribal traditional foods. Already, the lack of water is among one of the leading causes for the decline in the ability to grow corn and other crops... In the Great Lakes region, warming winters and changes in water level are crippling the ability of wild rice to grow and thrive in its traditional range. Wild rice is a pillar of cultural health for the Anishnaabeg people in Minnesota, and any decline in wild rice negatively affects their well-being. In response to threats facing wild rice, the Fond du Lac Band of Lake Superior Tribe has begun trying to address potential hydrological changes. In the early 1900s, settlers built ditches to drain the land for agricultural purposes, resulting in negative impacts to the watershed. The Fond du Lac are now building dams at ditch flow points to keep water levels stable and prevent extreme changes in water level that would negatively affect wild rice harvests. “Climate and ecosystems change over time. Paleoclimate, archaeology, and ethno-ecological research provide a foundation for understanding how climate, environmental productivity and tribal food utilization strategies evolved. Historical evidence demonstrates the rate of climatic change experienced within past environments and the accompanying tribal food security systems that occurred in response to these changes. Although the rate of change experienced was not as rapid as contemporary conditions, tribes historically experienced significant climate changes that affected ecosystems and food-based resources, requiring tribal cultures to strategically adapt and respond to survive. “Tribes may enter government-to-government agreements to increase their role in local resource management, to access additional areas to gather traditional foods, or lease and buy lands that ensure sustained access to traditional foods. Tribes may also exchange information and identify different technologies to access, acquire, process, and store foods. Additionally, tribes can develop formal and informal agreements with other tribes to grant or request access to traditional foods that may now only be found on one of their reservations. Tribes may have to consider diversifying their food-based resources and possibly adopting and utilizing new animals, plants, or fungi. “Addressing climate change through the knowledge, experiences, and policy contexts of indigenous peoples provides a powerful counter-point to the lack of effective global climate responses. As indigenous peoples may experience some of the harshest impacts of climate change, they can also lead the way in creative solutions for adaptation and ethical policy strategies. “Climate change impacts on tribal traditional foods should be viewed in the context of historical and cultural tribal relationships with places, wildlife, and plants, as well as in the landscape of the treaties, federal policies, and federal trust responsibilities and regulations in which they exist. Moreover, tribes view climate change adaptation in light of their reciprocal relations to care for and respect natural resources. As a result of these relationships of reciprocity and responsibility between tribes and nature and existing policies, Indian tribes’ vulnerability to climate change, and the adaptation strategies they adopt are multi-faceted and deeply rooted in a complex historical context. As sovereign governments, tribes have the authority to identify and implement adaptation strategies, and attempt to influence and strengthen the climate change protocols of other governments. “The various adaptive practices tribal practitioners and communities employ may enable managers to institute changes in policies, regional strategies, and resource regulation/conservation that enable ecosystems to respond more favorably to climate change. Tribal participation in local, regional and national climate change adaption frameworks and strategies, with a focus on food-based resources, can assist with prioritizing research and management directions. “Under extreme and rapid conditions of severe change at different ecological scales, western scientists and managers may need to partner with tribal scientists, managers, harvesters, and communities to explore innovative approaches to addressing climate change impacts. Tribal participation in climate change research, policy development and planning can help identify more solutions that fully consider tribal cultural values. Climate change will not obey the jurisdictional boundaries between tribal, private, state, and federal lands. As such, meaningful government-to-government relationships and collaboration will be vital to address the climate change impacts to the traditional foods, and to the wildlife, plants, and habitats valued by tribes and other Americans."
Lake Superior Climate Change Impacts and Adaptation
(2014) Huff, A; Thomas, A
This is a recent and comprehensive report that summarizes expected and cross-cutting impacts of climate change on all biophysical aspects of Lake Superior (fisheries, bird migration, pollutants, flooding, etc.). It is based on a review of other studies, and proposes a framework for monitoring changes in the Lake Superior basin.
New Heat Flow Map of Minnesota Corrected for the Effects of Climate Change and an Assessment of Enhanced Geothermal System Resources
(University of Minnesota Duluth, 2012) Klenner, Robert; Gosnold, William; Heine, John J; Severson, Mark J; Hauck, Steven A; Hudak, George J; Fosnacht, Donald R
Paleolimnology of the Lake of the Woods southern basin
(University of Minnesota Duluth, 2015) Reavie, Euan D; Edlund, Mark B; Andresen, Norman A; Engstrom, Daniel R
To quantify the environmental history of the southern basin of Lake of the Woods (Ontario, Manitoba and Minnesota), seven core locations were selected for retrospective analyses. Primary goals were to determine pre-European settlement conditions and track the timing and extent of anthropogenic impacts and remediation. Sediments were dated using isotopic analyses and fossil remains, in concord with other stratigraphic indicators (organic and inorganic materials, sedimentation rates, other biological entities), were used to reconstruct the ~150-year history of the lake. Diatom assemblages were assessed from sediment intervals and inferred trophic conditions in the profiles were derived using a regional diatom-based model for Minnesota lakes. Nutrient reconstructions indicated a period of cultural eutrophication throughout much of the 20th century. Despite a known reduction in anthropogenic nutrient flux to the lake in recent decades, there has been no apparent reversal in eutrophication in the pelagic system. Contemporary observations indicate that blooms of blue-green algae are becoming a greater problem. It appears that legacy nutrient recycling and other environmental drivers are maintaining the current condition of pelagic nutrient enrichment. Sedimentary analyses also indicated that physical changes to the lake resulting from warming may be contributing in small part to the recent reorganization of algal assemblages.
Preparing for the Inevitable: US Climate Change Preparation
(2013) Ernenwein, David
This study does not specifically target Minnesota’s coastal communities. However, in light of the 2012 flooding in the Fond du Lac basins, it highlights the need to anticipate and prepare for extreme weather events and flooding in the future in the region. The abstract is reproduced below. Abstract: “There is growing consensus in the scientific community that the global climate is changing. Increasing average global temperatures are expected to increase both the frequency and intensity of extreme weather events, which will affect human civilization. However, these events do not need to become disasters. Analysis of past extreme weather disasters in the United States shows that failures in policy, specifically in terms of disaster preparedness, are the real culprit and not the actual weather event. Given the increasing destructiveness of storms and the projected increase in frequency, it makes formulating a coherent and effective national response a priority.”
Responses of two understory herbs, Maianthemum canadense and Eurybia macrophylla, to experimental forest warming: early emergence is the key to enhanced reproductive output
(Botanical Society of America, 2015) Jacques, Marie-Hélène; Lapointe, Line; Rice, Karen; Montgomery, Rebecca A; Stefanski, Artur; Reich, Peter B
Understory herbs might be the most sensitive plant form to global warming in deciduous forests, yet they have been little studied in the context of climate change. A field experiment set up in Minnesota, United States simulated global warming in a forest setting and provided the opportunity to study the responses of Maianthemum canadense and Eurybia macrophylla in their natural environment in interaction with other components of the ecosystem. Effects of +1.7° and +3.4°C treatments on growth, reproduction, phenology, and gas exchange were evaluated along with treatment effects on light, water, and nutrient availability, potential drivers of herb responses. Overall, growth and gas exchanges of these two species were modestly affected by warming. They emerged up to 16 (E. macrophylla) to 17 d (M. canadense) earlier in the heated plots than in control plots, supporting early-season carbon gain under high light conditions before canopy closure. This additional carbon gain in spring likely supported reproduction. Eurybia macrophylla only flowered in the heated plots, and both species had some aspect of reproduction that was highest in the +1.7°C treatment. The reduced reproductive effort in the +3.4°C plots was likely due to reduced soil water availability, counteracting positive effects of warming. Global warming might improve fitness of herbaceous species in deciduous forests, mainly by advancing their spring emergence. However, other impacts of global warming such as drier soils in the summer might partly reduce the carbon gain associated with early emergence.
Vehicle miles traveled and the built environment: New evidence from panel data
(Journal of Transport and Land Use, 2020) Ihlanfeldt, Keith
There has been considerable interest in the impact that the built environment has on vehicle miles traveled (VMT). While this issue has been extensively researched, due to the heavy reliance on cross-sectional data, there remains uncertainty regarding how effective local land-use planning and regulation might be in reducing VMT. Based on a 13-year panel of Florida counties, models are estimated that relate VMT to new measures of the spatial distribution of alternative land uses within counties and county urban expansion. Identification of causal effects is established by including year and county fixed effects, along with an extensive set of control variables, and instrumenting those land uses that may be endogenous. Incremental annual changes in the spatial concentration of alternative land uses are found to affect VMT. The policy implication is that appropriate land-use policy can reduce VMT and should be considered part of the strategy for dealing with the problem of global warming.

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