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Biomes and ecological successions - Coggle Diagram
Biomes and ecological successions
Terrestrial Biomes
Tropical Forst
Precipitation
rainfall is relatively, about 200-400 cm annually
Temperature
averaging 25-29 ํC with a little seasonal variation
Plants
broadleaf evergreen trees are dominant
Epiphytes cover tropical forest trees
Thorny shrubs and succulent plant
Animals
millions of species including an estimated 5-30 million still undescribed species of insects, spiders, and other arthropods
Human Impact
being cut down and converted to farmland, urban area, and other types of land use
Desert
Precipitation
generally less than 30 cm per year
Temperature
maximum air temperature in hot desert may exceed 50 ํC
in cold deserts air temperature may fall below -30 ํC
Plants
majorly bare ground
succulents, deeply rooted shrubs, and moist periods
Animals
many species are nocturnal
water conservation is a common adaptation
Human Impacts
urbanisation and conservation to irrigated agriculture
a settlement of substantial populations
Savanna
Precipitation
averages 30-50 cm per year
Temperature
warm year around 24-29 ํC
Plants
fire-adapted and tolerant of seasonal drought
Grasses and small non-woody plants
Animals
Large plant-eating mammals
grazing mammal can be seen during seasonal droughts
Human Impacts
overly frequent fires
cattle ranching
Overhunting
Chaparral
Precipitation
highly seasonal, with rainy winters and dry summers
Temperature
fall, winter, and spring are cool, with average temperatures 10-12 ํC
average summer temperature can reach 30 ํC
Plants
some of the shrubs produce seeds
adaptation to drought and fire
Animals
native mammals include browser that feed on twigs and buds of woody vegetation
Human Impacts
heavily settled and reduced through conversion to agriculture and urbanisation
Temperate Grassland
Precipitation
periodic drought is common
Temperature
winter is cold with average temperatures below -10 ํC
Plants
dominant plants are grasses and forbs
Animals
native mammals include large grazers
Human Impacts
has been converted to farmland due to deep fertile soils
Taiga
Precipatation
generally ranges from 30 to 70 cm
Temperature
some areas of coniferous forest typically range in temperature from -50 ํC
Plants
dominated by cone-bearing trees
needle- or scale-like leaves reduce water loss
Animals
migratory birds
diverse mammals species
Human Impacts
have not been heavily settles by human populations
Temperate Broadleaf Forest
Precipitation
average from about 70 to over 200 cm
Temperature
winter temperature average 0 ํC
Plants
distinct vertical layers
closed canopy, shrub layer and herb layer
Animals
many mammals hibernate in winter
many bird species migrate to warmer climates
Human Impacts
logging and land clearing for agriculture and urban development
Tundra
Temperature
averages in some areas below -30 ํC
summer temperatures average less than 10 ํC
Precipitation
from 20 to 60 cm
Plants
mostly herbaceous, consisting of a mixture of mosses, grasses, and forbs
Animals
large grazing musk oxen are resident
caribou and reindeer are migratory
Human Impacts
sparsely settled
Aquatic biomes
Lakes
Eutrophic lakes
nutrient-poor
oxygen-rich
Oligotrophic lakes
nutrient-rich
depleted of oxygen
Wetlands
Basin
develop in shallow basins
Fringe
occur along the coast of large lake and seas
Riverine
develop along shallow and periodically flood banks of river and streams
Streams and Rivers
the water is generally warmer and more turbid
Estuaries
a transition area between river and sea
Intertidal Zone
periodically submerged and exposed by the tides, twice daily on most marine shores
Oceanic pelagic zone
a vast realm of open blue water, constantly mixed by wind driven oceanic currents
oxygen levels are generally high
Coral reefs
sensitive to temperatures below about 18-20 ํC and above 30 ํC
require high oxygen levels
Reef evolution
Fringing reef
form around the land mass, on a young, high island
Barrier reef
parallel to the shore but is separated by a channel of water
Marine Benthic Zone
consists of the seafloor below the surface waters pf the coastal, or neritic
receives NO sunlight
Succession
Primary
occurs when communities develop on entirely new land
takes century for a mature forest community to develop on a patch of bare rock
Secondary
occurs when succession starts on existing soil following the upheaval of a pre-existing ecosystem
involves the recolonisation of an area after the major disturbance has removed