BBC Bitesize - KS3 Biology - Food chains and food webs - Revision 4
In ecology, a biological interaction is the effect that a pair of organisms living together in a Pollinator insects like bees are adapted to detect flowers by colour, pattern, and Mutualism is an interaction between two or more species, where species relationship between two species that interact but do not affect each other. This might be straightforward for two divergent organisms, but can be extremely Moreover, the correlation between CBCs and the species concept occurs of CBCs between two sequences should be dependent on their overall divergence. If you think about this as it relates to a forest ecosystem, biotic factors include everything from fungi and plants to insects and other large.
That interaction is a vital part of how organisms develop and change over time. When you study species, it is important to watch the way they interact with their surroundings. There are four basic types of relationships that living things have with one another. Commensalism Sometimes one species can benefit from a relationship and not hurt the other. That relationship describes commensalism.
I've got a nice looking branch that no one's using.
Ecological interactions (article) | Ecology | Khan Academy
A plant comes over and settles in. It uses my branch as a place to live. But what do I care?
It doesn't bother me. That's what commensalism is all about. One plant gets a place to live and the other doesn't care and is not hurt. Competition This relationship is when two species are competing for the same resources. If there are only ten trees with fruit and I am better at reaching the fruit than you are, sorry, you don't get any.
When you don't get any fruit you die. That's just the way nature works.
It could go the other way though. If I kill all of the trees with the high fruit and only low fruit is left, you win. Competition usually happens when you have a limited amount of resources.
There is one important idea to remember. Omnivores eat both animals and plants.
Once again, knowing the Latin root helps a lot: For example, an insectivore is a carnivore that eats insects, and a frugivore is an herbivore that eats fruit.
This may seem like a lot of terminology, but it helps scientists communicate and immediately understand a lot about a particular type of organism by using the precise terms.
- What Are the Three Categories of Biotic Factors?
- What Is a Biotic Factor?
Not all organisms need to eat others for food and energy. Some organisms have the amazing ability to make produce their own energy-rich food molecules from sunlight and simple chemicals.
Interdependence of Living Things ( Read ) | Biology | CK Foundation
Organisms that make their own food by using sunlight or chemical energy to convert simple inorganic molecules into complex, energy-rich organic molecules like glucose are called producers or autotrophs. Some producers are chemosynthesizers using chemicals to make food rather than photosynthesizers; instead of using sunlight as the source of energy to make energy-rich molecules, these bacteria and their relatives use simple chemicals as their source of energy.
Chemosynthesizers live in places with no sunlight, such as along oceanic vents at great depths on the ocean floor. No matter how long you or a giraffe stands out in the sun, you will never be able to make food by just soaking up the sunshine; you will never be able to photosynthesize. Producers use the food that they make and the chemical energy it contains to meet their own needs for building-block molecules and energy so that they can do things such as grow, move, and reproduce.
All other life depends on the energy-rich food molecules made by producers — either directly by eating producers, or indirectly by eating organisms that have eaten producers. Not surprisingly, ecologists also have terms that describe where in the food chain a particular consumer operates. A primary consumer eats producers e. And it can go even further: A single individual animal can act as a different type of consumer depending on what it is eating.
When a bear eats berries, for example, it is being a primary consumer, but when it eats a fish, it might be a secondary or a tertiary consumer, depending on what the fish ate!Night Time in the mountains - 10 hours of HD Frogs, Crickets, Cicadas and other insects.
All organisms play a part in the web of life and every living thing will die at some point. This is where scavengers, detritivores which eat detritus or parts of dead thingsand decomposers come in. They all play a critical role that often goes unnoticed when observing the workings of an ecosystem.
Relationships Between Organisms
They break down carcasses, body parts and waste products, returning to the ecosystem the nutrients and minerals stored in them. This interaction is critical for our health and health of the entire planet; without them we would be literally buried in dead stuff.
Crabs, insects, fungi and bacteria are examples of these important clean-up specialists. Another category of interactions between organisms has to do with close, usually long-term interaction between different types of organisms.
These interactions are called symbiosis. The impacts of symbiosis can be positive, negative, or neutral for the individuals involved. Organisms often provide resources or services to each other; the interaction is mutually beneficial. For example, ants living in a tree may protect the tree from an organism that would like to make the tree its next meal, and at the same time the tree provides a safe home for the ants.
Symbiotic relationships are not always positive for both participants. Sometimes there are definite losers. The predator benefits and the prey is harmed lethally, but it is a short-term interaction.
In parasitism, the parasite does not usually kill its host, but just feeds on it for a long time while it is living. The interaction is seemingly neutral for one of the organisms.