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(Biotic)

Cutting down trees hundreds to thousands at a time

Deforestation controls the population size of trees and animals and critters that use the trees for shelter and food source

More buildings being built causes more pollution which gradually kills all life on earth

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Designer Babies: Biotic
Designer babies are when babies have there genetics modified to have desired traits. This can effect natural selection because babies need to adapt to their environment and if you give them traits that they don’t need/want, it can effect how they live. The baby might not want the traits which can effect how they want to live versus how you want them to live.

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Nataural disasters can destroy many species water supply and food supply. This can cause starvation and dehydration. Natural disasters can also destroy some species habitats and harm their body.

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Xander Castillo- Natural disaster:-biotic factors-animals can either be killed by hurricanes or impacted indirectly through changes in habitat and food availability caused by high winds storm surge and intense rainfall

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Xander Castillo- Natural disaster:-biotic factors-animals can either be killed by hurricanes or impacted indirectly through changes in habitat and food availability caused by high winds storm surge and intense rainfall

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Selective breeding of cattle on farms
biotic

Farmers use selective breeding on a farm for many different reasons. They choose which specified featured and desired traits that are wanted for the cattle. They find two parents that can support those traits and selectively breed the animals to make the cattle which will have the desired traits and specified features. Different traits are needed for different reasons and it depends on the animal and it’s job. Animals that are for work will be bigger and stronger to create more power. The farmers choose which traits are needed and find two parents to breed. The cattle then has the desired traits. https://gmoanswers.com/ask/how-do-farmers-use-selective-breeding-crops-and-live-stocks

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Disease (Biotic)
Diseases can attack the old and weak or the very young making infant mortality rates rise, total death rate to rise and life expectancy to decrease. This affects natural selection by eliminating the weak, but vaccines will cure these diseases causing the human life span to increase

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-Abiotic
-Farmland runoff can get into water and then the water can get bad stuff in it
-Animals who have never seen whatever is polluting the river could die and knock off a population.

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Selective plant breeding
(Biotic)
Breeding plants is an artificial way of breeding it can sometimes be useful or can harm specific species like the evolution of corn. Corn came from a plant called teosinte and the fuller kernels were bred for a more sufficient food source which is a good thing.The main problem with us growing this corn we will take up the shelters and food source of organisms that live there.

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Cut trees down for farming. This is bad  for animals that live there. They lose food and homes. Birds can not nest.

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Invasive Species
(Biotic)
- Lines of decent have had chances to experience natural selection and adaptation. If a new species enters an environment, this could make them easily invasive.
- If the invasive species kills off another that is best adapted, reproduction could become very difficult. This may force the population to drop.
- Another article says that species that have invasion success are indeed successful because they can respond positively to natural selection. This could happen because of evolutionary adaptations.

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Biotic

Land use affects population by taking the animals resources like food and water and replacing them with farms, houses ,and cities. This could be a problem because animals could be going into cities.

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Selective breeding is a biotic limiting factor

Selective breeding also called artificial selection is the process by which humans use animal and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will reproduce and have offspring together.

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-Selective Dog Breeding
-Biotic
-Definition of Selective Breeding: The process by which humans use animal and plant breeding to selectively develop particular phenotypic traits that they deem as important.
-All types of dogs descended from the grey wolf.
-Humans breed dogs to get a certain phenotypic trait they want but it comes at a cost. The process removes the genetic variation of those out through the process. After going through the process, they are also more likely to develop genetic diseases. Some traits that were present before can be lost in the process. Lastly, there is no way of 100% of the time getting exactly what you want so it could take many attempts putting multiple dogs in jeopardy.
-Articles:
https://healthresearchfunding.org/pros-cons-selective-breeding/
http://www.open.edu/openlearn/science-maths-technology/science/biology/the-selective-breeding-dogs

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-Biotic
-Because of warm weather the bears are waking up early and there is not enough food.

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(Biotic)

-Deforestation is cutting down trees on a massive scale

-deforestation limits the population of trees because the trees are cut down before they are able to grow back meaning the population is decreasing

-Deforestation also limits the population of creatures that live in that type of habitat because deforestation will cause the loss of habitat which will either have to move to another habitat or they will died off.

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-Biotic

-The migration-selection balance constrains the genetic divergence of populations.

-Tends to oppose the effects of divergent natural selection

-Increases variation within populations

-Can cause reduced fitness or “migration load” by constraining local adaption, which leads to persistent natural selection

-Gene flow, or the transfer of genetic variation across populations, allows new genetic combinations and variation

-Affects maladaptation level, which determines selection differential

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Pest Control
( Abiotic )
• pest control is used to kill bugs on crops
• if ingested the chemicals can harm, or potentially kill animals even if intended for bugs
•an example of this is pesticides effects on the bee population.

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-abiotic
- Climate can get warmer from global warming
- Global warming can make the Earth get warmer
- Changes from sun’s intensity and volcano eruptions are limiting factors
- Main warming in today’s world is mostly caused my humans putting too much carbon in the atmosphere , like when we choose to extract and burn coal, oil, and gas, or cut down and burn forests.

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Natural disasters
(abiotic)
Floods cover the land in water because of the increased water levels of rivers, lakes, and ponds. The animals living in areas that are flooded, specifically animals that burrow for shelter are in fear of drowning during floods, like wombats. If the wombats population decreases, many of the wombats predators will lose a major food source, like owls, foxes, and Dingos.

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Biotic (it contains strands of diseases)

Vaccinations threaten carrying capacity

Makes animals healthier & gives them a longer live expectancy

Opposite of a limiting factor, it increases the amount of organisms

As humans develop new vaccinations & technology more animals survive

If there is not enough food, those who are vaccinated will still die.

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- Biotic
- As another result of global warming, winters will be shorter. Due to the shorter winters, animals will have less time to hibernate.
- This relates to natural selection as animals that hibernate for shorter amounts of time will be better off in this new environment, and animals that take a long time to hibernate will not do well.

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-Abiotic
-Oil pollution toxins can get into organisms and cause health problems
-Destroys the ability for fur to insulate animals causing many to die of hypothermia
-Changes in heart rate, a reduced growing rate in the organism, and poison in the organism are all effects of oil pollution
-Organisms with a higher tolerance to the chemicals will survive more often

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- Abiotic
- The climate will become warmer due to global warming
-Global warming is caused by humans releasing greenhouse gases into the air, which causes the climate temperature to rise
- Polar caps melt faster
- Animals that swim better will pass on their traits, and the animals that don't swim well will die
- Or animals with high heat tolerance/thin fur will pass on those traits and the animals that don't have high heat tolerance/thin fur will die because of hyperthermia/heat exhaustion
- This effects natural selection because the climate will force animals to adapt to the new climate/heat and water mass

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(Abiotic)

— Pest control is used to kill bugs mostly put on crops
— If ingested by animals could make them sick and potentially kill them
— For example the bald eagles became endangered when a type of pesticide (DDT) was in ground water and ingested by the bald eagles. When they laid their eggs, the pesticide softened the shell of the eggs, so when the mother birds sat down to keep their eggs warm, the softened shells broke under the weight and the babies inside were killed.