Abiotic and Biotic Factors Flashcards
designed to enrich out appreciation of the world which is crucial for human well-being and prosperity
ecology
Provides new knowledge of the interdependence between people and nature that is vital for important issues such as food production, maintaining clean air and water, and sustaining biodiversity in a changing climate
ecology
study of interactions of organisms with other organisms and with the physical environment
ecology
“Each living organism has an ongoing and continual relationship with every other element that makes up its environment”
principle of ecology
the sum total of interacting living organisms and their non-living environment in an area
ecosystem
ecology and this are related because ecological interactions are natural selection pressures that have long-term effects
evolution
ECOLOGICAL LEVELS OF ORGANIZATION
Ecosphere
Biosphere
Ecosystem
Community
Population
Organism
summation of all biospheres (ecosystems) worldwide
ecosphere
community of organisms and populations interacting with one another and with the abiotic factor making up their environment
ecosystem
populations of different plants and animals living and interacting in an area at a particular time
community
group of organisms of the same species living within a particular area
population
any form of life which includes plants and animals
organism
Abiotic factors include:
wind
sunlight
soil
temperature
atmosphere
water
means house or home, Greek word for ecology
oikos
means to study
logos
– coined the term ecology
Ernst Haeckel
Defined ecology as “the body of knowledge concerning the economy of nature, the investigation of the total relations of the animal to its inorganic and organic environment
Ernst Haeckel
study of the house or the place we have lived
Ecology
focuses on how an individual organism interacts or response to abiotic environment
Autecology
deals with interactions among populations or communities
Synecology
interdisciplinary field that incorporates concept from natural sciences and social sciences (e.g. politics, economics, and ethics)
environmental science
Interactions can be:
biotic to biotic
biotic to abiotic
abiotic to abiotic
may observe or examine the factors affecting marine population, an environmental scientist might develop a method or a product that would lessen population
ecologist
examines interactions between a population and environment
population ecology
includes organisms of belonging to same species occupying same place at a given time
population
deals with interactions among populations of all species living in a certain area which makes up a community
community ecology
focuses on the interactions among all biotic and abiotic components of the system
ecosystem ecology
comprises the community and its physical environment
ecosystem
has developed a number of sub disciplines that focus on specialized areas in science
modern ecology
– refers to which an organism’s ecology may affect its heredity
genetic ecology
which ideals with mathematical modeling of interactions among components of an ecosystem
systems ecology
focuses on spatial distribution or patterns in the environment
landscape ecology
include the physical (e.g. topography, altitude, transparency) and chemical environment (e.g. salinity, amount of nutrients, pH)
abiotic factors
can be geographical/natural or man-made (outer -physical, inner-social)
abiotic factors
Can be classified as either a resource or a condition
abiotic factor
abiotic factor that can be consumed (e.g. air, water, and inorganic nutrients)
resource
– those which may be experienced and affects biotic components (e.g. temperature and pH)
conditions
can be considered both a resource and condition (resource – used for photosynthesis and a condition since its presence and absence can affect the behavior of animals)
light
major source of energy and natural light from Earth
sun
travels in the form of waves, it is a form of electromagnetic radiation with a wavelength perceived by humans as the color of the light (visible light) or non-visible light such as: X-rays, gamma rays ultraviolet light, microwaves, and
radio waves
light
can be reflected, absorbed, or transmitted
light
how much light is reflected in plants
6-12
how much light is transmitted
10-20%
how much light is absorbed in aquatic
90 percent
visible portion of solar radiation needed for photosynthesis with a wavelength of 400 to 700 nanometer (nm)
photosynthetically active radiation
is not 100% reaching the Earth’s surface (about 51% of the solar energy traveling to Earth makes it through the atmosphere to the Earth’s surface)
solar radiation
scatter the solar radiation, and reflects it back to space
cloud and atmosphere
is filtered or absorbed by the ozone layer situated in the stratosphere
ultraviolet rays
process of food production in plants thereby considered as one of the most important process on earth
photosynthesis
forms visual color allowing vision and main source of energy and affects global temperature
photosynthesis
region in the earth that receives the highest amount of solar radiation thereby resulting to high temperature as compared to polar regions
tropical
the innate activity and inactivity of organisms in response to light is characteristics of all organisms
except bacteria
circadian rhythms
means about
circa
means day
dies
those who are active during night time
nocturnal organisms
those active during day time
diurnal organisms
- when the duration of light (dark) reaches a certain portion of 24-hour day, it inhibits or promotes what
photoperiodic response
are those whose reproductive or other seasonal activity is stimulated by daylengths shorter than their critical day length.
short day organisms
Ber months, longer nights
short day organisms
they are not being controlled by day length
day neutral
are those whose seasonal responses such as flowering and reproduction, are stimulated by daylengths longer than the critical day length.
long day organisms
Observed during summer months (watermelon, mangoes
long day organisms
evaporation of water from the leaves of the plant (stomatal movement to reduce evaporation movement)
transpiration
-refers to the covering of land which is composed of minerals, organic material, gases, living organisms, air, and water which supports plant growth
soil
Five factors that influence soil formation
parent material
climate
biotic factors
topography
time
refers to the mass of rock in which soil maybe formed
parent material
Can be igneous rock, sedimentary rock, or metamorphic rock
parent material
rock that come from volcanoes
igneous rocks
rock that – come from deposition of minerals or sediments
sedimentary rock
may come from decay of plants and animals, or even from shells in the ocean floor
sediments
either igneous or sedimentary rock which have been altered by heat or pressure
metamorphic rock
which include factors such as temperature and rainfall may affect the formation of soil
climate
refers to the long term weather condition of an area
climate
It may affect the plant and animal life as well as the rate of weathering and decomposition
climate
include all organism from microscopic e.g. bacteria and fungi to huge plants and animals
biotic factors
aids in the decomposition or breaking down of organic materials to inorganic matter thereby bringing back the nutrients to the soil
bacteria and fungi
refers to the contour of the land which may affect the holding capacity of water in the soil and weathering process
topography
is being done in steep slopes to avoid soil erosion and preventing loss of water.
terracing
is very important factor that affects soil formation. It takes several years for the soil to be formed especially in a barren area in which weathering (breaking down of rocks process) should take place to release the mineral tied up in the rocks.
time
Usually young soils are more fertile than old soils because of long- time leaching of nutrients which are not being replaced by fresh materials
time
has several properties which include color, texture, and structure
soil
can be used as a basis for its identification, as it may indicate the content of the soil
soil color
color of soil that may indicate fertility or high organic content due to carbon
brownish to black
decomposed organic materials that have high organic content due to carbon
hummus
indicate the presence of iron
reddish soil
– indicate presence of quartz or carbonates of calcium and magnesium
white and grey soil
refers to the proportion of each soil particles which is based on the size.
soil texture
Soil particles are divided into four:
clay
sand
silt
gravel
soil particle measuring 2.0mm
gravel
soil particle measuring 0.05 to 2.00 mm
sand
soil particle measuring 0.002 to 0.05
silt
soil particle measuring smaller than 0.002mm
clay
out of the four soil particles, this can hold more water than gravel
clay
can move in large particles than in small particles such as clay
air
possesses large pore spaces that favor rapid water infiltration, percolation and drainage.
coarse textured soil
soils containing almost equal mixture of clay, silt sand and humus and is the ideal for planting
loam
refers to the manner in which soil particles are being clumped
soil structure
are not attached to one another resulting to a granular structure.
sandy particles
particles that stick to one another
clay particles
characteristic of good soil which means that it crumbles because it has spaces for air and water.
friable
Soil profile refers to the horizontal layers in the soil
soil profile
each layer of the soil profile is known as
horizon
uppermost layer, organic layer because it contains organic matter
o layer
Where loose leaves, twigs, and undecomposed materials or litters are found
o layer
Usually brown or black in color
which layer
o layer
– top soil, lies beneath the O layer, which is also known as the topsoil
a layer
Usually topsoil is darker in color and looser than other layers because of the humus and or decomposed organic matter and some inorganic mineral particles
a layer
Most of the living organisms and nutrients are found in A layer
a layer
layer where minerals and humus are found
a layer
transport of dissolved organic matter and minerals to lower layers
leaching