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Report by : Eleanor Saguit

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Limiting factors Alimiting factor or limitingresource is a factor that controls a population'sgrowth, such as organism growth or

species population, size, or distribution. Limiting factors includes space, water, and food. The

availability of food, predation pressure, or availabilityof shelter are examples of factors that could be

limiting for an organism. An example of a limitingfactor is sunlight in the rainforest, where growth islimited to all plants in the understory unless morelight becomes available.

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Examples of limiting factors of a population growthA. Terrestrial Ecosystem

1. Temperature

2. Water3. Moisture4. Soil nutrients

B. Marine Ecosystem1. Salinity2. Temperature3. Sunlight4. Dissolved Oxygen

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If an organism is to live and survive in its habitat, itmust be able to obtain the materials it needs forgrowth and reproduction. Anything that is essential toan organism and for which there is competition iscalled a limiting factor. In an open field, the oxygencontent of the air would not be a limiting factor for anumber of grazing animals. But if the same number ofanimals were to be confined inside a closed barn forsome time, then oxygen becomes a limiting factor.

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Let us take cattails for example. These plants growalong the shore of a lake where the water is not toodeep and soil condition is soft and muddy. Beyond thatparticular area, the water will be deeper. In that depthof water, this cattail won't live nor grow. So you couldreally say that the depth of the water as well as the soilcondition becomes the limiting factors of the growthof cattail

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Cat tails

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The continuous survival of any organism dependsupon certain specific sets of conditions in thesurroundings. If such conditions are limited, then theorganism's survival is likewise inadequate. However ifthe organism learn to survive, then they are able totolerate any set of conditions surrounding them.Tolerance is the ability of organisms to withstand

variety of environmental conditions.

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Law of Tolerance

Proposed by Victor Shelford in 1913.This is an extension of the Law of the Minimum.It refers to the upper and lower bounds to physicalenvironment an organism can tolerate.These boundaries affect the ability to function, grow,and reproduce. These changes can be broad andnarrow.

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Ecological Niche In ecology, a niche is a term describing the relational

position of a species or population in an ecosystem.

More formally, the niche includes how a populationresponds to the abundance of its resources andenemies

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Homeostasis in the Ecosystem Homeostasis (from Greek: , hmoios, "similar,

and , stsis, "standing still) is the property of asystem that regulates its internal environment andtends to maintain a stable, constant condition ofproperties such as temperature or pH. It can be eitheran open or closed system.

In chemistry, pH is a measure of the activity of the(solvated) hydrogen ion.

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Ecosystem Stability & Homeostasis

Ecosystems require stability to survive.

Homeostasis refers to the properties in a system thatenable it to remain stable. This can refer to a livingorganism, but it also applies to an ecosystem.Homeostasis and stability are both important to the

well-being of any ecosystem.

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Example

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Explain the homeostasis of the

ecosystem? It is also known as a biological equilibrium. This is also

referred as a balance of nature. An ecosystemmaintains a biological equilibrium between thedifferent components and is referred as a homeostasis

It keeps on changing with the time and is not static.The balance is maintained by the number of factors.These include the carrying capacity of theenvironment and the capacity for recycling of the

waste.

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Types of Ecosystem Ecosystem refers to an interdependent group of

natural elements and organisms that exist in aparticular environment and the habitat with whichthese elements interact. Ecosystems are importantbecause they sustain the natural world, providinghumans with the resources we require in order to liveand thrive.

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Terrestrial ecosystemsTerrestrial ecosystems can be found anywhere apartfrom heavily saturated places.

Aquatic EcosystemsThe aquatic ecosystem is the ecosystem found in abody of water. It encompasses aquatic flora, fauna and

water properties, as well. There are two main types ofaquatic ecosystem - Marine and Freshwater.