Ecology is a discipline of biology that is primarily concerned with the investigation of the interactions that exist between organisms and their environment.

Organisms

An organism is a continuous biological system that exists in a given environment and has the ability to adapt and maintain a specific structure and behaviour. Fungi, bacteria, plants, animals, and humans are all included in this group. A population is formed when a group of organisms band together. The population forms a community that is responsible for the operation of the ecosystem. The ecosystem is made up of both biotic and abiotic components.Temperature, water, light, and soil are some of the most important abiotic elements that influence the physical and chemical characteristics of distinct habitats.

Organisms and environment

A living entity is formed by its surroundings, which in turn shapes the organism in its later existence. Biological ecologists investigate the interactions between organisms and their environments in ecosystems of various sizes, from microscopic communities to the entire planet.This increases their chances of survival. The polar bear has different characteristic traits that help them to adapt to the extremely cold climate of Antarctica. 

Population

A population is defined as a collection of individuals or organisms of any species that are found in a well–defined geographical area at a certain moment and have the ability to interbreed with other individuals or organisms of that species. For example, the deer population in a woodland.

Population and attributes

• The total number of individuals born in a certain period of time is referred to as the “birth rate.”

• Death rates are defined as the total number of deaths over a certain period.

• Total number of females and men per 1000 individuals is referred to as the gender ratio.

• A plot showing the age distribution (also known as an age pyramid)

Population Growth

The term “population growth” refers to the increase in the number of people in a given population over time. This is dependent on a variety of conditions, including the weather, food supply, predator pressure, and so on. There are several factors that influence population density, including:

• Natality – During a specified time period, the number of births in a population was counted.

• Mortality – During a specific time period, the number of deaths in a population was counted.

• Emigration – The number of individuals who relocated to a new environment during a specified period of time.

• Immigration – The number of people who have entered the habitat from another location within a specified period of time.

Population growth models

• Exponential – Due to a limited quantity of food, the population continues to rise at an exponential rate.

• Logistic growth – When resources are limited and, sooner or later, become scarce, population expansion is referred to as logistical population growth.

Population interactions 

When we talk about inter-population interactions, we’re talking about the interaction between distinct populations. Population interaction can take place in a variety of ways. These are some examples:

• The term “kill and feed” refers to an interaction in which one creature kills and consumes another one. The term “predator” refers to the person who kills, whereas the term “prey” refers to the person who is slain.

• When 2 distinct creatures or species come into contact, this is the form of biological connection where both creatures or species are injured.

• It is a sort of interspecies interaction in which a parasite infects the body of some other organism and causes harm to it while the parasite is present.

• This form of contact is beneficial to only one creature, whereas the other organism neither benefits from nor is hurt by it.

• In this form of contact, all the organisms or creatures gain from another’s presence and activity.

Conclusion

Surroundings and living species interact with one another and with their environment, and the study of this interaction is known as ecology.In any situation, organisms and their surroundings are interrelated, interconnected, or constantly responsive.When it comes to organisms belonging to a species, autecology is the analysis of their connection.It is the scientific study of the relationship between a collection of diverse species and their surrounding environment that is known as synecology.The term “ecological hierarchy” refers to the hierarchy of creatures at different levels that is tied to ecological groupings of organisms.When it comes to ecological hierarchy and ecology studies, organisms are the smallest units and the most fundamental units to consider.It can be tiny (e.g., amoeba, chlorella, bacteria) or maybe even macroscopical (e.g., fungus, bacterium) (e.g., Rose, Mango, Crocodile, Dog, Human being).Depending on the organism, it might be single cells (such as Amoeba, Euglena, and Chlamydomonas) as well as imperial (such as the Volvox) (e.g., Fish, Lizard, Mango tree).

The ability to grow, self-heal, move, and regulate one’s own activities is inherent in every creature.A population is defined as a collection of individuals (members of the same species) who live in the same place (particular geographical area) and are of the same species.