Deepti Notes FY

Species:

Species According to Merrell (1962), a species is a natural biological unit tied together by the sharing of a common gene pool . A uniform interbreeding population spread over time and space.

Population:

Population A population is a group of individual organisms of the same species in a given area.

Community:

Community A community is a group of population of different species in a given area. For ex. Fern community, algal community, seed eating bird community.

Vegetation:

Vegetation The collective and continuous growth of plants in space is called vegetation.

Flora:

Flora Flora is the species content of the region irrespective of the numerical strength of each species.

Factor:

Factor Any external force, substance or condition that affects organisms in any way is known as factor.

Environment:

Environment The sum of all such factors constitutes the environment.

Habitat:

Habitat The place, where an organism lives, is called Habitat. The habitat of an organism actually represents a particular set of environmental conditions suitable for its successful growth.

Adaptation:

Adaptation Any feature of the organism or its parts which is of definite significance in allowing that organism to exist under the condition of its habitat is called adaptation.

Biological clock:

Biological clock Plant species possess physiological mechanism that indicate particular seasons of the year, and thus plant species are known as biological clocks.

Biological spectrum:

Biological spectrum The percentage distribution of species among the various life forms of a flora is called the biological spectrum of that place .

Ecosystem:

Ecosystem In a given area, the biotic assemblage of all organisms, plant as well as animals (i.e. communities), interacts with its physical environment in such a manner that is a flow of energy leading to clearly defined trophic structure, biotic diversity, and material cycles within a system, known as an ecological system or Ecosystem.

Ecosystem:

Ecosystem