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Coniferous Forest, Tundra, Temperate Grassland, Temperate Broadleaf
Malini Gandhi, Joy Kang, Lena Gollick, Carla Forbes
Biome Project
Coniferous Forest: Latitude
Exists in broad bands across northern North America and Eurasia to the southern border of the Arctic Tundra 50 to 60 degrees N latitude
Coniferous Forest: Temperature and Precipitation
Temperature range: -40 C to 20 C
Precipitation: 300 to 900 milliliters of rain per year
Example: Beaverlodge, Alberta, Canada
All coniferous forests are dominated by a few species of needle-bearing trees such as pine, spruce, fur and hemlock
There are two types of coniferous forests:
1. Coniferous forests that grow in the lower latitudes of North America, Europe, and Asia along the coasts or in the higher mountain areas are actually temperate rainforests. These areas are warm and moist, with precipitation reaching annual levels up to 2,000 mL in some areas. A few of the largest tree species in the world, such as the Giant Sequoia and Coast Redwood of California, thrive and tower upwards in these temperate forests.
2. The taiga, or the northern boreal forest, exists in broad bands across Eurasia and North America just below the tundra. These areas receive heavy snowfall during cold, long, dry winters, while the short summers are relatively warm and moist. Cone-shaped conifers laden with snow stretch across huge expanses of land, and snowshoe hares, wolverines, and other animals are adapted to the snow and the cold
Coniferous Forest: A Description
Redwood forest
Taiga
1. The northern boreal forests experience long, cold, and dry winters with heavy snowfall. This extreme abiotic factor limits and shapes the animal and plant species there; the conifers are cone-shaped to bear heavy snow, while animals deal with the pressing conditions by migrating, going into hibernation, or possessing valuable features to survive in the winter (snowshoe-like feet, white camouflage, layers of fur, etc.)
2. The summers are short but relatively warm, wet, and humid. The taiga soil is often water-logged during the brief period when the snow finally melts, making parts of the area almost bog-like; trees such as black spruce and larch grow well in the poorly-drained soil.
3. Soil tends to be poor in nutrients. The thinness of the soil is mostly due to the cold temperatures that prevent plant growth; additionally, the extremely acidic nature of fallen conifer needles further leeches the soil and reduces the rate of decomposition. Competition for nutrients is fierce, and the acidic nature of the forest floor means that only lichens and some mosses grow on it.
Coniferous Forest: Abiotic Factors
Conical shape: promotes shedding of snow, loss of branches.Needles: reduces surface area through which water may be lost
through transpiration. Needles also possess thick waxy coatings that protect them from freezing temperatures and drying winds.
Retention of foliage: allows the tree to photosynthesize as soon as the temperature permits it during the spring so it doesn’t waste time growing leaves.
Dark color: absorbs the maximum amount of heat from the sun.
Coniferous Forest Plants: General Advantages of Needle-bearing trees
Coniferous Forest Plants: Black Spruce (picea mariana)Black Spruce is a tall tree – growing up
to 25 m tall – with short, blue-green needles. It produces black cones with purplish-brown seeds that provide food to a variety of birds
Well-adapted to the taiga environment:1. Layered twigs, waxy pine needles, and
rough bark protect the tree against severe cold
2. The tree enjoys poorly-drained soil, which is essential for survival because taiga soil is often wet and bog-like during the brief summer when the snow finally melts
Tamarack larches are actually “coniferous-deciduous trees” with light blue-green needle-like leaves that turn bright yellow before falling off in the autumn
Found in Canada and central Alaska at the edge of the tundra
Though it is not coniferous, the tamerack larch is well adapted to the taiga environment
1. Very cold tolerant, surviving in temperatures as low as -65 C
2. Grow most commonly in swamps in wet to moist soil, a perfect correlation with the taiga’s bog-like soil in the summer
3. Can grow in the thin, nutrient-poor soil of the taiga
Coniferous Forest Plants: Tamerack Larch (larix laricina)
Very large rabbit that lives in northern forest areas where the ground is covered with undergrowth
Feeds on grass, clover, and other greens in the summer, and bark, twigs, and buds in the winter
Predators: wolf, bobcat, lynx
Coniferous Forest Animals: Snowshoe Hare (lepus americanus)
Well-adapted to coniferous forests with heavy snowfall- Large rear feet and toes that can spread out act as snowshoes- Feet also have fur on the bottom, which protects the rabbit against the cold and provides them with traction in the snow- The snowshoe hare is a rusty, grayish-brown color in the summer, but in the winter it turns pure white, which helps them merge with the snow and hide from predators
A powerfully-built, meat-eating animal; the largest member of the weasel family
With its keen sense of smell, the wolverine preys on rodents, fish, reptiles, birds, carrion, and sometimes berries
Well-adapted to living in the cold and the snow:
- Strong jaws can bite through frozen meat and bone
- Feet act as snowshoes to keep the animal from sinking into deep snow
Coniferous Forest Animals: Wolverine (gulo luscus)
The coniferous forests of Yellowstone National Park are shaped by fire. Most tree species have adapted to burning:
- Douglas-fir has thick bark to protect it against fire- Other species, such as lodgepole pine, have very thin
bark and instead rely on the rejuvenating influence of periodic fires. Lodgepole cones remain closed until exposed to intense heat; the new generation of trees benefits from the nutrients and direct sunlight
But in recent years, fire-suppression from humans had prevented small lightning-induced fires that the lodgepole pines depend on to destroy old, flammable trees. Finally, in 1988, the accumulated fuel of old trees caused a massive fire that destroyed the old lodgepole forest.
Coniferous Forest Ecological Disturbance: Yellowstone Fire of 1988
The first stage (50 years): Small plants and young lodgepole pines spring up among dead trees; the trees are widely spaced and the vegetation is low lying and green. Flammability is low.
The second stage (100 years): The lodgepole pines form dense stands up to 50 feet tall, and their shade blocks the growth of other vegetation. Flammability is low; there is still some dead trees on the ground, but even if they caught on fire the treetops are too high to be affected.
The third stage (100 years): The original pines are thin out, ground vegetation increases, and fir and spruce trees start to appear. Green vegetation on the forest floor prevents large fires initially, but later in the stage small trees provide fuel that can spread fire into the canopy.
The fourth stage: The original lodgepole pines are dying, and the abundant woody fuel means the forest is at its most flammable state; the forest is ready for fire.
Coniferous Forest Ecological Disturbance: Succession After Fire
During the fire…
Growing back…
Text Citations• Radford.edu. “Taiga or Boreal Forest.”
http://www.radford.edu/~swoodwar/CLASSES/GEOG235/biomes/taiga/taiga.html • NASA, Earth Observatory, “Coniferous Forests,”
http://earthobservatory.nasa.gov/Experiments/Biome/bioconiferous.php• Campbell, Neil. “Biology.” Pearson Education, Inc. 2002.• Wikipedia.org. “Taiga.” http://en.wikipedia.org/wiki/Taiga• Blue Planet Biomes. “Taiga.” http://www.blueplanetbiomes.org/taiga.htm• Wikipedia.org. “Larch.” http://en.wikipedia.org/wiki/Larch• Ruhf, Robert J. “The 1988 Forest Fires of Yellowstone National Park.”
http://www.x98ruhf.net/yellowstone/fire.htmPicture Citations http://www.radford.edu/~swoodwar/CLASSES/GEOG235/biomes/taiga/taiga.html http://earthobservatory.nasa.gov/Experiments/Biome/bioconiferous.php http://sunnyfortuna.com/explore/images/bigtrees.jpg http://www.windows2universe.org/earth/images/taiga_lg.jpg http://www.blueplanetbiomes.org/taiga_plant_page.htm http://2.bp.blogspot.com/_B_5jvio717o/Ss9O2IeEbtI/AAAAAAAABEU/GI_FwwCb1nQ/s400/
Tamarack_9233.jpg http://www.blueplanetbiomes.org/taiga_animal_page.htm http://warnercnr.colostate.edu/~dkash/YNP%20fire.jpg and
http://2.bp.blogspot.com/EbTjIPVOfu4/Tl2s7hOpTWI/AAAAAAAAGEA/kIBCR9L8_3g/s1600/fire+succession.jpg
Coniferous Forest: Citations
Tundra: Climate and LatitudeTemperature Range is 70 °C to 12°C 6-10 inches of snow fall each yearThe tundra is located between latitudes
55°-70°
I think the Tundra is…A queer biome. It is the coldest, yet driest
biome! Even though the first thing you might picture about a tundra is tons of snow, it actually has little precipitation. In a way, it is a desert with permafrost in the place of sand.
Tundra Plants: Arctic MossThe arctic moss is a type of plant that grows
very slowly and lives very long.It grows in the tundra only because the
tundra has very little nutrients, and it can store nutrients when it is not growing to make more leaves in the spring.
It also grows closer to the ground so that the extremely powerful winds do not harm it.
Tundra Plants: Arctic WillowThe arctic willow is a
tree that does not grow vertically but spreads its branches out over the permafrost.
To protect itself, the arctic willow produces pesticides that keep bugs like the Arctic woolly bear away.
It also keeps warm by growing long fuzzy hairs on its leaves.
Tundra Animals: Polar FoxThe polar fox is a small white fox that lives in
the tundra as a scavenger.The polar fox, also known as the white fox,
keeps the environment clean by eating dead animals
It also is the specialist predator of lemmings and voles
The fox has a long bushy tail which it uses as insulation by wrapping it around itself when sleeping
Tundra Animals: Polar BearPolar bears usually eat
ringed seals.However, they eat most
living things from plants and smaller mammals, such as the polar foxes, to whale carcasses.
They are at the top of the food chain and also the largest terrestrial predators.
Polar bears have thick fur and a warming layer of fat to keep warm. Under their fur, polar bears have black skin to soak in the sun’s rays.
Tundra: Abioitic FactorsThe Tundra is mostly covered in permafrost,
permanently frozen soil, that melts at the top during the brief summer. The permafrost prevents any deep-rooted plants, such as trees, from growing.
The extremely low temperature prevents most varieties of animals and plants from living in the tundra, in addition to the permafrost.
Tundra: Ecological DisturbanceIf there was a hypothetical disturbance on
land in the Tundra climate, there would only be “primary succession” where moss and lichen would grow.
Since lichen and moss are the majority of plants that live in the Tundra, that would pretty much be the end of the succession.
Text Citations http://www.blueplanetbiomes.org/tundra.htm
Picture Citations http://www.ri.net/schools/West_Warwick/manateeproject/ppt/Erica-
Dan_files/slide0003_image009.gif http://biomef.wikispaces.com/file/view/17HannahFrostyTundraPic.j
pg/32753247/17HannahFrostyTundraPic.jpg http://www.marietta.edu/~biol/biomes/images/tundra/alaskapipelin
e1.jpg http://www.google.com/imgres?q=arctic+moss&um= http://mtnhp.org/thumbnail/defaultGen.aspx?itemid=72319&maxW
idth=434&maxHeight=400&names=Arctic%20Willow%20Salix%20arctica©right=Scott%20Mincemoyer
http://good-wallpapers.com/pictures/4375/Polar-fox_wallpaper.jpg http://www.travel-location-blog.com/data/media/13/polar-bear-habit
at_895.jpg
Tundra: Citations
Temperate Grassland: Climate and LatitudeAnnual precipitation: 25-75 cmTemperature: -40 degrees F - 70 degrees FLatitude: 25 degrees N and S
Temperate Grassland: DescriptionTemperate Grassland is a wide open space
with few tall trees because it is very windyUsually dominated by few types of grassSoil is very rich and especially good for
farming
Buffalo GrassFound in Temperate GrasslandNot adapted to shade or heavy traffic, so
open grassland is goodCan withstand extreme temperatures, but
does best in low rainfall areas
Blazing StarA flower that prefers fertile soil and full sun,
which is readily available in temperate grassland
American BisonShaggy with hornsGraze in open grassy areas
and in large herdsEat grasses, grasslike
plants, berries, lichens, horsetails
Coyotes, Eagles, Bobcats, the Gray Wolf, Wild Turkey, Fly Catcher, Canadian Geese, Crickets, Dung Beetle, Bison, and Prairie Chicken life in environment
Most active in early morning and afternoon
Prairie DogsLive in underground burrowsBurrows may be shared by snakes, burrowing
owls, and even rare black-footed ferrets which hunt prairie dogs
Leave burrows during daylight to eat grasses, seeds, roots
Abiotic FactorsWind is an abiotic factor that characterizes
Temperate Grassland because wind prevents tall trees from growing and keeps it as open grass
Rainfall is another abiotic factor, decides how tall the grass will be and separates areas of Temperate Grassland into tall grass prairies and short grass steppes
Disturbance: FireIf a fire occurred in Temperate Grassland,
secondary succession would occur, because the soil would be intact.
The soil would also be enriched by the dead vegetation
Fire in prairies also germinates certain seedsArea would re-grow quickly with new grass
http://prague.tv/images/stock/grass-fire-450.jpghttp://www.blueplanetbiomes.org/grasslands.htmhttp://animal.discovery.com/guides/mammals/habitat/tempgrassland/ambison.htmlhttp://science.jrank.org/pages/3127/Grasslands.htmlhttp://images.fineartamerica.com/images-medium/black-tailed-prairie-dogs-wrestling-around-max-allen.jpghttp://prague.tv/images/stock/grass-fire-450.jpghttp://www.thewildclassroom.com/biomes/grasslands.htmlhttp://aggie-horticulture.tamu.edu/archives/parsons/turf/publications/buffalo.htmlhttp://www.gpnc.org/images/jpegs/animals/bison.jpghttp://www.nhptv.org/natureworks/amerhttp://animals.nationalgeographic.com/animals/mammals/prairie-dog/http://www.environment.fhwa.dot.gov/ecosystems/greenerroadsides/images/spr02_photo3.jpg
Citations: Temperate Grassland
Temperate Broadleaf: Climate and Latitude-30 - 30 degrees Celsius20-60 inches of precipitation annuallyBetween 40 and 50 degrees latitude ( Eastern
United States)
Temperate Broadleaf: Description
The Temperate Broadleaf Biomes are unique because of their four seasons, and the adaptations of the trees because of these seasons. In fall the leaves of the trees change color and fall of in the winter, in which the trees are in a point of dormancy. The leaves falling off prevent transpiration, letting the tree retain moisture for the winter, essentially allowing it to survive. During spring and summer the growing season occurs. Temperate Broadleaf biomes have very cold winters and hot, rainy summers.
Temperate Broadleaf Plants: Oak and MapleOak and Maple trees live in Temperate
Broadleaf forests. Their ability to shed their leaves makes them ideal for this environment. The leaves of these trees provide nutrients necessary for the tree, helping them survive in this biome.
Temperate Broadleaf Animals: Rabbit and Grey SquirrelTwo species of animals include rabbits and
the eastern grey squirrels. Rabbits inhabit burrows in the ground and squirrels use the trees as shelter. These species live in this biome because they have special adaptations like hibernation in which they store fat in their bodies for the winter for when food is scarce.
Temperate Broadleaf: Abioitic FactorsTemperature changes along with the very
distinct seasons. This temperature fluctuation accounts for the deciduous trees which shed their leaves, a unique characteristic of the biome.
The tree cover and warm, wet summers cause a buildup of organic materials, which creates a rich, fertile soil.
Temperate Broadleaf: Ecological DisturbanceIf farming took place in this biome, and the
forest was cut down, secondary succession would take place after a while. If the farm was abandoned the trees would grow back to be a forest, after first being recolonized by herbaceous plants and shrubs.
Temperate Broadleaf: CitationsText Citations http://www.radford.edu/swoodwar/CLASSES/GEOG235/biomes/tbdf/tbdf.ht
ml http://earthobservatory.nasa.gov/Experiments/Biome/biotemperate.php
Picture Citations http://www.roebuckclasses.com/maps/physicmap/biome/tbdfmap.gif http://media.nowpublic.net/images//1e/9/1e9be5e2804b4bec20ea3c262d91
b246.jpg http://northantsgreenparty.files.wordpress.com/2011/04/new-forest-conser
vation-park_image.jpg http://www.whitedragon.org.uk/images/oaktree.jpg http://4.bp.blogspot.com/_vyWU0Smuj_w/TNlmITNhSFI/AAAAAAAACKs/6H
DZ5vm1IYA/s1600/autumn_tree.jpg http://www.naturephoto-cz.com/photos/others/wild-rabbit-41946.jpg http://www.fcps.edu/islandcreekes/ecology/Mammals/Eatern%20Gray%20S
quirrel/egrysqurl.jpg http://www.legacy-by-design.com/media/images/blog/iStock%20Green%20
Farm.JPG