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The tundra biome is the coldest of all biomes, with extremely low temperatures averaging between -20°F to -30°F. It has a short growing season and receives little precipitation annually. Plants grow slowly due to the cold and include various mosses, shrubs, grasses, and willows. Fauna includes herbivores like caribou and lemmings, and carnivores such as arctic foxes and polar bears. Threats to the tundra include melting permafrost from climate change and human disturbances from resource extraction and infrastructure development. The tundra plays an important role in global climate regulation and biodiversity.
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High latitude tundra PERIOD 3
The high latitude tundra biome is located in northern regions such as Alaska, Canada, Greenland, Siberia, and Russia. It has a very cold climate with short growing seasons and nutrient-poor soil. Typical vegetation includes bearberry, arctic moss, and pasque flowers. The tundra has some of the lowest productivity levels of any ecosystem due to its harsh climate and infertile soils, producing only 600 kilocalories per square meter per year. Primary succession occurs as glaciers recede, exposing bare rock that is slowly colonized by pioneer plants and mosses, building up soil over time. The main threats to tundra ecosystems are global warming, which could melt permafrost, and human activities
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Sub tropical deserts
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This document describes the climate and conditions of the world's hottest deserts. It notes that temperatures during the day can exceed 52°C, while nights are freezing, with short, violent storms. Water is found underground in porous rocks, where some plants and animals go to drink. Only 25% of deserts are sandy, while others have bare rock, mountains, and dunes prone to sandstorms. Plants and animals in deserts are adapted to the harsh climate by storing water, accessing underground sources, and reducing water loss.
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39 Lecture Ppt
1. The document describes the major terrestrial ecosystems and how they are characterized by particular climates. The different ecosystems include tundra, coniferous forests, temperate deciduous forests, temperate grasslands, savannas, and deserts.
2. It also discusses aquatic ecosystems, separating them into freshwater ecosystems like streams, rivers, lakes and ponds, and marine ecosystems which include coastal ecosystems and different zones of the ocean.
3. Ocean currents play a major role in redistributing heat around the world and influencing global climates.
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This unit aligns with the Next Generation Science Standards and with Common Core Standards for ELA and Literacy for Science and Technical Subjects. See preview for more information
If you have any questions please feel free to contact me. Thanks again and best wishes. Sincerely, Ryan Murphy M.Ed www.sciencepowerpoint@gmail.com
Desert
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39 Lecture Ppt
1. The document describes the major terrestrial ecosystems and how they are characterized by particular climates. The different ecosystems include tundra, coniferous forests, temperate deciduous forests, temperate grasslands, savannas, and deserts.
2. It also discusses aquatic ecosystems, separating them into freshwater ecosystems like streams, rivers, lakes and ponds, and marine ecosystems which include coastal ecosystems and different zones of the ocean.
3. Ocean currents play a major role in redistributing heat around the world and influencing global climates.
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A desert is defined as a barren area that receives little precipitation, making living conditions difficult for organisms. About one-third of the Earth's land is arid or semi-arid, including polar regions called "cold deserts". Deserts can be classified by factors like precipitation, temperature, causes of desertification, and location. Plants and animals in deserts have adaptations like small leaves, spines, staying underground or dormant to survive the harsh environment. The Atacama Desert in Chile is one of the driest places on Earth, with some weather stations never receiving rain.
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Deserts cover about one-fifth of the Earth's surface where rainfall is less than 50 cm per year. There are both hot and cold deserts, with the Sahara being the largest hot desert and Antarctica the largest overall. Desert plants have adaptations like shallow or deep roots to access water from storms or groundwater. Common plants include cacti, while animals include camels, lizards, tortoises, foxes, and snakes.
Desert Ecology
Desert Ecology and the Mega Engineering Sahara Project
There are two main types of deserts: hot and dry deserts, and cold deserts. Hot and dry deserts experience temperatures over 45°C and receive less than 5.9 inches of rainfall per year on average. Both plants and animals in deserts have adapted to the harsh climate conditions by storing water and food or avoiding heat. While deserts cover one-fifth of the Earth's surface, they contain unique biomes, and attempting to transform deserts into forests would destabilize the wildlife.
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This document summarizes six major ecosystem types: forest, grassland, desert, tundra, freshwater, and marine. It provides 1-3 defining characteristics of each ecosystem type. Forest ecosystems have diverse flora and fauna, tall trees with dense foliage that can be deciduous, coniferous, or a mixture. Grasslands have a semi-arid climate with grasses and flowers, providing an ideal grazing environment. Deserts receive low precipitation, generally under 25cm/year, and have sparse or no vegetation. Tundra soils may remain frozen with lichens and small flowers in spring/summer under harsh cold climates. Freshwater ecosystems include stationary or flowing water and support more than just fish
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Deserts cover 30% of the Earth's surface and are defined as regions receiving less than 25cm of annual rainfall. They generally occur on the western sides of continents between 20-30 degrees latitude where hot, dry winds blow inland, causing high evaporation and limited rainfall. Common plants in different deserts include cacti in North America, aloe in Africa, and date palms in the Middle East. Desertification is the process where semi-arid regions near deserts become drier over time due to climate change and human activities like overgrazing and deforestation.
Biomes, Weather and Climate Unit, Earth and Life Science Lesson PowerPoint
This PowerPoint is one small part of the Weather and Climate unit from www.sciencepowerpoint.com. This unit consists of a five part 2500+ slide PowerPoint roadmap, 14 page bundled homework package, modified homework, detailed answer keys, 19 pages of unit notes for students who may require assistance, follow along worksheets, and many review games. The homework and lesson notes chronologically follow the PowerPoint slideshow. The answer keys and unit notes are great for support professionals. The activities and discussion questions in the slideshow are meaningful. The PowerPoint includes built-in instructions, visuals, and review questions. Also included are critical class notes (color coded red), project ideas, video links, and review games. This unit also includes four PowerPoint review games (110+ slides each with Answers), 38+ video links, lab handouts, activity sheets, rubrics, materials list, templates, guides, and much more. Also included is a 190 slide first day of school PowerPoint presentation.
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This unit aligns with the Next Generation Science Standards and with Common Core Standards for ELA and Literacy for Science and Technical Subjects. See preview for more information
If you have any questions please feel free to contact me. Thanks again and best wishes. Sincerely, Ryan Murphy M.Ed www.sciencepowerpoint@gmail.com
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The document summarizes key aspects of the desert biome, including its hot and dry climate, plants and animals that have adapted to survive with little water, and the threats posed by human activity like poaching and construction. Some desert animals include snakes, owls, jackrabbits and endangered species like black rhinos and cheetahs. Plants like cacti and dragon trees have adapted to store water. Seasons are warm throughout the year. Many organisms are nocturnal or underground to avoid the heat. Oases provide water that allows limited settlements in the desert.
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Biomes, Weather and Climate Unit, Earth and Life Science Lesson PowerPoint
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Julia Pavlenko
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Projecto biologia
- 2. ENVIROMENT Tundra is the coldest of all the biomes. It is noted for its frost-molded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short growing seasons. Dead organic material functions as a nutrient pool. The two major nutrients are nitrogen and phosphorus. Winter temperatures don't reach above 20° F and average -20° to -30°F. The tundra is an unusually cold and dry climate. Precipitation totals 6-10 inches of rain a year, which includes melted snow. The tundra climate spans from most of Greenland to parts of Alaska, northern Canada, and northern Russia. The latitudinal range is 75° N to 60° N. Tundra climates can be found on the coastal areas of the arctic. The ocean water keeps the climate from falling to the extreme temperatures found in the interior of the continents.
- 3. FLORA All of the plants found in the tundra biome grow very slowly due to the cool temperatures. There are more than 2,000 types of plants that can grow there. Most of them are types of moss. However, you will also find shrubs, grass, and some willow out there as well. Approximately 400 different species of flowers have been identified in the tundra biome. Because of the short growing season, most tundra plants are perennials-they spend several years gathering and storing nutrients between each episode of seed production. Many can reproduce by sending runners through the soil, sprouting new plants at the nodes. This is less costly than blooming and producing seeds and fruits. Plants Arctic Moss Arctic Willow Bearberry Caribou Moss Diamond-leaf Willow Labrador Tea Pasque Flower Tufted Saxifrage
- 4. FAUNA The fauna in the arctic is also diverse. Herbivorous mammals include lemmings, voles, caribou, arctic hares and squirrels. Carnivorous mammals include arctic foxes, wolves, and polar bears. Migratory birds include ravens, snow buntings, falcons, loons, ravens, sandpipers, terns, snow birds, and various species of gulls. Insects include mosquitoes, flies, moths, grasshoppers, blackflies and arctic bumble bees. Artic fishes include cod, flatfish, salmon, and trout. Animals are adapted to handle long, cold winters and to breed and raise young quickly in the summer. Animals such as mammals and birds also have additional insulation from fat. Many animals hibernate during the winter because food is not abundant. Another alternative is to migrate south in the winter, like birds do. Reptiles and amphibians are few or absent because of the extremely cold temperatures. Because of constant immigration and emigration, the population continually oscillates.
- 5. FOOD WEB
- 6. THREATS • Threats • Solutions • The melting of the permafrost as a result of • Switch to alternative energy uses to global warming could radically change the minimize human-made global warming. landscape and what species are able to live • Establish protected areas and park reserves there. to restrict human influence. • Ozone depletion at the North and South • Limit road construction, mining activities, Poles means stronger ultraviolet rays that and the building of pipelines will harm the tundra. intundra habitat. • Air pollution can cause smog clouds that • Limit tourism and respect local cultures contaminate lichen, a significant food source for many animals. • Exploration of oil, gas, and minerals and construction of pipelines and roads can cause physical disturbances and habitat fragmentation. • Oil spills can kill wildlife and significantly damage tundra ecosystems. • Buildings and roads put heat and pressure on the permafrost, causing it to melt. • Invasive species push aside native vegetation and reduce diversity of plant cover.
- 7. IMPORTANCE The Tundra plays a large role in the temperature regulation of the planet. As warm air rises from the tropical zone it is cooled in theTundra causing it to sink back down to the equator. This causes weather and air currents. Without this system climate as we know it would change drastically around the world. Areas that once could support life may not anymore. It is also a winter home for many species of birds. If they were to disappear from the food chain it would cause devastating changes to other species dependent on the. the tundra is a key factor in global biodiversity.
- 8. VOCABULARY Phosphorus: a solid, nonmetallic element existing in at leastthree allotropic forms, on e that is yellow, poisonous,flammable, and luminous in the dark, one that is red, less poisonous, and less flammable, and another that is black,insoluble in most solvents, and the least flammable Biodiversity: diversity among and within plant and animal species in anenvironment.
- 10. CREDITS Ian Diaz Luis Medina Job Gutierrez