abound on Earth- They biological environments in the planet that are neither created nor altered by humans
NATURAL ECOSYSTEMS
NATURAL ECOSYSTEMS can be classified as
terrestrial or aquatic ecosystems.
True to their name, enormous amount of rain. receive an
- It is the richest biome in terms of species richness or the number of species.
- Tropical trees stay green all year (evergreen).
- A closer look, however, reveals several layers of trees and conditions that change from one layer to the next.
Rain forest
4 layers of a rain forest
Emergent layer
CAnopy layer
Understory layer
Forest floor layer
-
has the tallest trees that tower above all other plants, control how much light and water reach the lower layers.
EMERGENT LAYER
layer beneath the emergent wherein layer trees overlap to form a solid green roof.
CANOPY LAYER-
- organisms in this layer have a very difficult environment because only small amount of sunlight reaches them.
UNDERSTORY layer
- is dark, and the air is still and quiet. Despite this condition, this layer is still brimming with life.
FOREST FLOOR layer
areas where grass is the main type of plant.
Grassland
Those in places with alternating hot summers and cold winters are called .
Temperate grasslands
Those in places where the climate is hot all year round are called
tropical grasslands
Grows in milder climates.
The weather in a temperate forest changes with season.
Temperate forests
do have lots of sand, but they also have carpets of flowers, caves, canyons, and strange rock formations that add to their beauty.
Deserts
Temperate forests are divided into two categories:
A.Deciduous
B.Coniferous
- are home
to deciduous or hardwood trees that shed leaves each winter.
A.Deciduous forests
contains evergreen trees that bear cones
A coniferous forest
A vast polar plain between taiga and the permanent surrounding the North Pole. ice
Tundra
Most of the water on the tundra is permanently frozen in the soil as .
permafrost
include oceans, lakes, rivers, streams, estuaries, and wetlands.
Within these aquatic ecosystems are living things that depend on the water for survival, such as fish, plants, and microorganisms.
AQUATIC ECOSYSTEMS
- It covers about 70 percent of Earth.
- An estimated 90 percent of all photosynthesis and release of free oxygen take place in the oceans.
- Marine algae and photosynthetic bacteria provide most of the planet’s oxygen needs.
MARINE ENVIRONMENTS
- These are the only places where you can easily get fresh waters
FRESHWATER ENVIRONMENTS
- 3 Zones of Freshwater
- Littoral
- Limnetic
- Profundal
-General name for a kind of ecosystem that develops where freshwater or saltwater and land meet.
WETLAND
2 Categories of Wetland
- Inland
- Coastal
