The use of specific words is common, but sometimes hard to understand or at least to understand exactly what it means, sometimes the real meaning is different from the “normal” use of the word.
Ecology: science, a branch of Biology, studies the organisms and the interactions among them and surrounding environment.
Species: a set of organisms with similar characteristics, which can breed with each other and give birth to fertile descendants (concept very hard to define).
Population: a group of individuals from the same species, living in the same place, at a certain period of time.
Community: all the organisms living in a same place at a certain period of time.
Habitat: place inhabited by a particular species (plant, animal or organism) where the ecological conditions are correct for it to occur, like sun, light, wind, temperature,….
Biotope: a small parcel of a habitat; it is an area of uniform environmental conditions providing a living place for specific species.
Ecosystem: the complex of living organism -community, their physical environment –habitat and the interactions between them -biotic and abiotic factors.
Biotic factors: to do with living organisms, their interactions
Abiotic factors: to do with the environmental – temperature, wind, humidity, soil, light.
Biosphere: the global ecological system including all the living beings of the planet.
Atmosphere: the gases surrounding the earth, the gaseous part of earth
Lithosphere: the solid external layer of earth
Hydrosphere: all the liquid parts of earth, a discontinuous layer (rivers, lakes, sea, ocean)
Ecosphere: the biggest ecosystem, the sum of biosphere, atmosphere, lithosphere and hydrosphere.