How does climate change affect the Arctic food web?
Climate change is having a rapid impact on the Arctic food web on land and on the ice. … As the ice melts away the sunlight hits the water giving energy to microscopic algae to grow. This algae becomes food for the tiny armies of zooplankton which become food for fish, birds and whales.
How are Arctic ecosystems affected by climate change?
Recent research shows that climate change can potentially alter the transport of pollution to polar areas and exert an even greater burden in the form of environmental toxins on the arctic ecosystem. As climate change warms arctic waters, higher temperatures can increase the uptake of toxins in marine organisms.
What is the food web in the Arctic?
In the Arctic, there are several food chains that criss-cross to make a food web, starting with the sun, then producers like phytoplankton in the sea and grasses and lichens on land. Some of the consumers in the food webs are krill, fish, birds, reindeer, and seals.
How is the food web unique in the Arctic area?
In open-water, or pelagic, ecosystems phytoplankton form the base, or first trophic level of the marine food web. One unusual feature of marine arctic food webs is that primary production can only occur during a very short period of the year.
When did climate change in the Arctic start?
Scientists first started to see evidence of changes in Arctic climate in the 1980s. Since then, the changes have become much more pronounced. Each year, Arctic sea ice follows the same general trajectory: growth from late September through March or April, and melt from April through mid-September.
Why is the Arctic vulnerable to climate change?
That the Arctic should be especially sensitive to climate change was recognized in the 19th century. The primary reason for this sensitivity is that an initial warming (or cooling) sets in motion a chain of events that amplify the warming or cooling. This chain of events is known as the albedo feedback.
How are crops affected by climate change?
Climate change may actually benefit some plants by lengthening growing seasons and increasing carbon dioxide. Yet other effects of a warmer world, such as more pests, droughts, and flooding, will be less benign. Under the HadGEM2 model, corn farmers will see crops decline by nearly 16 percent. …
How does global warming affect the Arctic tundra?
Global warming has already produced detectable changes in Arctic and alpine tundra ecosystems. These ecosystems are being invaded by tree species migrating northward from the forest belt, and coastal areas are being affected by rising sea levels. Both phenomena are reducing the geographic extent of the Arctic tundra.
What is the basis for all food webs in the Arctic and Antarctic?
The raw materials are sunlight for energy, with carbon dioxide and water providing the main raw materials for growth. Producers drive all food webs and chains.
What does Arctic cod feed on?
Arctic cod eat krill and other aquatic invertebrates. Ringed seal eat arctic cod, as well as other fish.
What climate is the Arctic?
The climate of the Arctic is characterized by long, cold winters and short, cool summers. There is a large amount of variability in climate across the Arctic, but all regions experience extremes of solar radiation in both summer and winter.