Published under the authority of the GreenFacts Scientific Board. Implications are particularly great for future generations that will face the consequences of current action or inaction. Other observed changes in the United States include a shift in the temperate broadleaf/conifer forest boundary in the Green Mountains of Vermont; a shift in the shrubland/conifer forest boundary in New Mexico; and an upward elevation shift of the temperate mixed/conifer forest boundary in Southern California. Rising temperatures. Canadian Arctic Climate change is causing ice sheets to melt at a rapid pace. Animal species’ diversity, ranges, and distribution will change. Arctic ecosystem changes will have an impact on a global scale, notably by affecting migratory species’ summer breeding and feeding grounds. The Arctic is home to an array of plants, animals, and people that survive in some of the most extreme conditions on the planet and that are uniquely adapted to such conditions. Climate is an important environmental influence on ecosystems. Arctic fox's habitat in the Arctic tundra is in a hairline balance in an ecosystem which is vulnerable to climate change. For instance, warming may force species to migrate to higher latitudes or higher elevations where temperatures are more conducive to their survival. To learn more about climate change impacts on human health, visit the Health ImpactsÂ page. How is the climate changing in the Arctic? Levy, S. MacCracken, P.R. Understanding and Responding to Climate Change: Highlights of National Academies Reports. Moreover, local features of the natural world and societies create differences in what impacts will occur and which will be most significant locally. This ecosystem is a vast area of small, shallow lakes, known as "prairie potholes" or "playa lakes." This Digest is a faithful summary of the leading scientific consensus report produced in 2004 by the Arctic Climate Impact Assessment (ACIA): "Impacts of a Warming Arctic: Arctic Climate Impact Assessment " Learn more... 1.1 The world’s climate is changing. A major ocean current in the Arctic is faster and more turbulent as a result of rapid sea ice melt, a new study from NASA shows. Because the processes involved are highly dependent on temperature, changes in one have consequences on the other. The many indigenous communities whose cultures and activities are shaped by the Arctic environment are facing new challenges because of climate change, in addition to those posed by current social, economic, and political conditions. Terrestrial and Inland Water Systems. 10.3 Impacts of changing climate in the Arctic are already being widely observed and felt. 2. This is known as coral bleaching. Though the Earth's climate has changed in the past, the rapid severity of this change will directly â¦ Over the past 25 years, the population of AdÃ©lie penguins decreased by 22%, while the population of Chinstrap penguin increased by an estimated 400%. United States Global Change Research Program. All the organisms in an ecosystem are While this means a range expansion for some species, for others it means movement into less hospitable habitat, increased competition, or range reduction, with some species having nowhere to go because they are already at the top of a mountain or at the northern limit of land suitable for their habitat. The Arctic ecosystem is tundra, and covered in snow and ice for most of the year. Learn about the impact and consequences of climate change and global warming for the environment and our lives. Contact Us to ask a question, provide feedback, or report a problem. Kissel, A.N. In fact, without action, Australia is expected to warm as much as 5 degrees Celsius (9 degrees Fahrenheit) by 2090. This summary is free and ad-free, as is all of our content. Climate change presents a major and growing challenge to the Arctic and the world as a whole. Climate change and shifts in ecological conditions could support the spread of pathogens, parasites, and diseases, with potentially serious effects on human health, agriculture, and fisheries. Climate change is having a direct impact on the people that live in the Arctic, as well as other societies around the woâ¦ From a human perspective, the rapid climate change and accelerating biodiversity loss risks human security (e.g. FOODWEBSANDECOSYSTEMS An ecosystem is a community of bacteria, plants, and animals that occupy the same habitat. Climate Change and Arctic Ecosystems Figure2 Figure2 A who-eats-whom food web in the Arctic. Changes in the Arctic will not only affect local people and ecosystems but also the rest of the world, because the Arctic plays a special role in global climate. *1 Most of the warming observed in the past 50 years is attributed to human activities and particularly to the burning of fossil fuels. This year, as the sea ice extent continues to decline and scientists race to understand climate change across the Arctic, Brown and his Canadian colleagues will be tracking how ice algae energy is transferred throughout an entire ecosystem's food chain in Foxe Basin, north of Hudson Bay, by measuring the same chemical marker in sediments, plankton, fish, and various marine mammals. All the organisms in an ecosystem â¦ Additionally, recently logged forested areas may become vulnerable to erosion if climate change leads to increases in heavy rain storms. , An ecological threshold is the point at which there is an abrupt change in an ecosystem quality, property, or phenomenon, or where small changes in one or more external conditions produce large and persistent responses in an ecosystem.. More... 7.1 Indigenous communities are facing major economic and cultural impacts. 4.1 The Arctic region has three main types of vegetation: polar deserts in the north, boreal forests in the south, and tundra in between. Because species differ in their ability to adjust, asynchronies can develop, increasing species and ecosystem vulnerability. A changing climate combined with human impact is creating a different Arctic landscape.  CCSP (2008).Â The Effects of Climate Change on Agriculture, Land Resources, Water Resources, and Biodiversity in the United States . In: Climate Change 2014: Impacts, Adaptation and Vulnerability. Given that Antarctica is one of the regions of the world where the impacts â¦ Melillo, and T.C. The current is part of a delicate Arctic environment that is now flooded with fresh water, an effect of human-caused climate change. And the Arctic helps to regulate the worldâs temperature, so as more Arctic ice melts the warmer our world becomes. They provide an early indication for the rest of the world of the significance of climate change. Learn about the impact and consequences of climate change and global warming for the environment and our lives. Precipitation is projected to increase by roughly 20%.  NRC (2008). In a region as large as the Arctic, there are significant sub-regional variations in climate. Polar bears, for example, depend on summer sea ice to hunt seals. In this activity, students learn about how climate change is affecting the Arctic ecosystem and then investigate how this change is impacting polar bear populations. Global Change Research Program, 514-536. Dokken, K.J. National Research Council. The global climate is changing.The impacts of climate change are being observed earlier in the Arctic, and with more immediate and severe consequences, than in most of the rest of the world. Climate change will affect coral reef ecosystems, through sea level rise, changes to the frequency and intensity of tropical storms, and altered ocean circulation patterns.  USGCRP (2014).Â Chapin, F. S., III, S. F. Trainor, P. Cochran, H. Huntington, C. Markon, M. McCammon, A. D. McGuire, and M. Serreze, 2014: Ch. For example, boreal forests are invading tundra, reducing habitat for the many unique species that depend on the tundra ecosystem, such as caribou, arctic foxes, and snowy owls. Check out the infographic below to see how climate change is affecting the water cycle. The ability of the Arctic populations to cope with the impacts of climate change will be greatly affected by political, legal, and socioeconomic factors such as growing populations, urbanization, or self-determination movements. âClimate Change Impacts by Sectors: Ecosystems.â Karl, T.R., J.M. It also includes less material benefits, such as regulation of local climate conditions and aesthetic value or cultural identity. Thresholds of Climate Change in Ecosystems. As winters have become shorter and milder, the timing of these events has changed in some parts of the country: An ecosystem refers to the animals, plants, and microorganisms that live in one place, as well as the environmental conditions that support them. 2 Minute Read The planet is â¦ Because the processes involved are highly dependent on temperature, changes in one have consequences on the other. For example, the large reduction in summer sea ice threatens the future of several ice-dependent species but will also increase marine access to resources and population centers. More fish can be a good thing, but it can also mean that additional new predators could appear in the Arctic in the future, and other parasites, which could bring an â¦ A global 2018 study published in the journal Science showed that every ecosystem on Earth could face a dramatic shift if climate change continues unabated. The Arctic food web is complex. Red foxes historically lived south of the Arctic foxâs tundra habitat.  USGCRP (2014). More... 6.1 Many coastal communities and facilities face increasing exposure to storms.  Range shifts disturb the current state of the ecosystem and can limit opportunities for fishing and hunting. The Arctic ecosystem is tundra, and covered in snow and ice for most of the year. This parasite has extended its range northward from Chesapeake Bay to Maine, a 310-mile expansion tied to above-average winter temperatures. Studying climate change in Antarctica is important because it enables scientists to predict more accurately future climate change and provide information to politicians and policy makers. Climate Change and the Arctic. More... 4.4 Climate change is expected to increase the range of crops that can be grown in the Arctic and to extend the growing season. 23: Hawaiâi and U.S. More... 4.2 The expansion of forest is likely to amplify global warming, because the newly forested areas are darker than the tundra they replace, and absorb more of the sun’s energy. Not only is the decline of sea ice impairing polar bear populations by reducing the extent of their primary habitat, it is also negatively impacting them via food web effects. How is this change in the arctic ecosystem impacting polar bear populations?  USGCRP (2014). Most scientists agree that Arctic weather and climate are changing because of human-caused climate change. Information on past climatic conditions obtained from ice cores and other sources shows that the current increase in global temperatures goes beyond natural climate variability. Sea level rise is likely to cause flooding of marshes and coastal plains and accelerate beach erosion. Overpeck, and M.A. 10. *2 Melting of the Greenland ice sheet may increase this number significantly. Groffman, P. M., P. Kareiva, S. Carter, N. B. Grimm, J. Lawler, M. Mack, V. Matzek, and H. Tallis, 2014: Ch. As rivers and streams warm, warmwater fish are expanding into areas previously inhabited by coldwater species. Ecological Impacts of Climate Change.Â National Research Council. Students analyze maps of Arctic sea ice, temperature graphs, and polar bear population data to answer questions about the impact of climate change on the Arctic ecosystem. In turn, predators (such as foxes or birds of prey) and human communities that depend on these animals would be affected. For example, the first people who went to North America from Asia more than 20,000 years ago â¦ The Arctic of the north pole is home to the iconic polar bear and around four million people spread across eight countries. Richmond, and G. W. Yohe, Eds., U.S. Similarly, as sea level rises, saltwater intrusion into a freshwater system may force some key species to relocate or die, thus removing predators or prey that are critical in the existing food chain. Arctic Climate Impact Assessment. 5.1 Many Arctic animals, such as polar bears, seals, walruses, and seabirds, rely on the sea’s biological productivity and on the presence of sea ice, both of which are highly dependent on climatic conditions. , In some cases, ecosystem change occurs rapidly and irreversibly because a threshold, or "tipping point," is passed. Regions in the Canadian Arctic are experiencing the effects of climate change at an alarming and unprecedented rate. Hence, declines in ice algae can contribute to declines in polar bear populations.. More... 10.3 Impacts of changing climate in the Arctic are already being widely observed and felt. Climate change not only affects ecosystems and species directly, it also interacts with other human stressors such as development. As the icy waters of the Arctic melt faster and faster, its natural repercussions will be felt by people all over the world, especially the local communities and the uniquely adapted wildlife that live around this icy landscape. More... 5.4 A decline in certain types of vegetation would affect the animals that feed on them (such as lemmings or reindeers). In this activity, students learn about how climate change is affecting the Arctic ecosystem and then investigate how this change is impacting polar bear populations. The current is part of a delicate Arctic environment that is now flooded with fresh water, an effect of human-caused climate change. More... 1.2 The Arctic region is the area around the North Pole, essentially an ocean surrounded by land. Arctic marine fisheries provide an important food source globally, and are a vital part of the region’s economy.  These factors lead to local extinctions of both plants and animals in some areas. More... 5.5 Freshwater ecosystems, such as rivers, lakes, and wetlands are home to a variety of animals. Climate change poses a huge threat to our future. Climate change, pollution, and growing resource use are factors that put an increasing pressure on fragile Arctic populations and ecosystems. Science has shown that climate change touches every corner of our planet’s ecosystem, and the water cycle is no exception. The alga has drifted from the Pacific Ocean through the Arctic, following the reduction in polar ice.  USFWS (2010). Earlier springs have led to earlier nesting for 28 migratory bird species on the East Coast of the United States.  USGCRP (2014). The Arctic includes Greenland, Iceland, and the northern parts of Norway, Sweden, Finland, Canada, Russia, and the United States. Image credit: Nikolai Shtepsel/Shutterstock.com. RED FOX COMPETITION. Students analyze maps of Arctic sea ice, temperature graphs, and polar bear population data to answer questions about the impact of climate change on the Arctic ecosystem. Endangered and Threatened Wildlife and Plants; 12-month Finding on a Petition to List the American Pika as Threatened or Endangered. Horton, R., G. Yohe, W. Easterling, R. Kates, M. Ruth, E. Sussman, A. Whelchel, D. Wolfe, and F. Lipschultz, 2014: Ch. Recent warming has been more dramatic in some regions than in others. 8: Ecosystems, Biodiversity, and Ecosystem Services. Climate change will lead to rising sea levels in the Arctic Ocean (Proshutinsky et al., 2001) and other northern seas. Arctic marine fisheries provide an important food source globally, and are a vital part of the regionâs economy. A stressor is a factor that reduces the health or productivity of an ecosystem (i.e., causes stress). Climate is an important environmental influence on ecosystems. A biome is a large, naturally occurring community of plants and animals occurring in a regional or global land area. Climate Change Impacts in the United States: The Third National Climate Assessment, J. M. Melillo, Terese (T.C.) 10. A further decline in the area of Arctic sea-ice will extend the navigation period and allow better accessibility by ship around the Arctic Basin and probably open new shipping routes. However, humans have a long history in the tundra. More... 2.2 Global temperatures are expected to increase further during the 21st century. â¦ In this activity, students learn about how climate change is affecting the Arctic ecosystem and then investigate how this change is impacting polar bear populations. More... 4.3 Due to the warming, insect outbreaks will increasingly disturb large areas of forest. Climate change is likely to alter ecosystem composition and function â that is, which species make up an ecosystem and the way in which energy and materials flow through these systems. T his month, Arctic sea ice shrank to its second lowest level on record, while the Antarctic Peninsula is one of the most rapidly warming places on the planet. Â As a result, the ranges of vegetative biomes are projected to change across 5-20% of the land in the United States by 2100.. Fagre, D.B., Charles, C.W., Allen, C.D., Birkeland, C., Chapin, F.S. Global Change Research Program, 537-556. Estrada, R.C. , Similarly, when coral reefs become stressed from increased ocean temperatures, they expel microorganisms that live within their tissues and are essential to their health. The loss of sea ice can ultimately affect the entire food web, from algae and plankton to fish to mammals. On average, the temperature on the Earth’s surface has increased by 0.6°C (1°F) over the last two centuries. ABOVE: An iceberg fracturing off the Antarctic Peninsula JEROEN INGELS. Arctic amplification is not the only evidence of rapid climate change in the Arctic. Rising temperatures are expected to favor a northward expansion of boreal forest into the tundra, and of tundra into the polar desert.
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