sana Archive
Hydrosere succession occurs in water bodies undergo. It has following stages: Submerged stage The plants are entirely submerged near the bank of lake or pond. These are the pioneers of the hydrosere. They include several flowering plants like Hydrilla, Potamogeton etc. These plants grow
The succession occur in dry condition is called Xerosere (xerarch ) . It undergoes following stages. Crustose lichen stage Crustose are land lifeless structure. The crustose may have an external protective layer surface on the rock. Special types of lichens can grow on ,these
The process of community development is called succession. Different stages are involved in the development of succession in a bare area. These stages are migration ecesis. aggregation, competition reaction and stabilization Migration All bare areas are without seed or other propagules. Seeds, spores and
The process of community development is called succession. Community changes alter the ecosystem . This change favours the competitors. Thus the species replace one another. Finally a stable. self sustaining climax community is reached. Succession is a kind of community relay. in this case.
There are following two types of sampling methods: (a) Transect method A transect is a long rectangular sample plot. It is used to study variations in vegetation. Vegetation varies with the changing environments. These variations are caused by slope, exposure, edaphic and topographical irregularities.
The attributes (characteristics) of a commit), are classified into three main groups: analytic. synthetic and physiognomic. (a) Analytic characteristics The characteristics which can be analyzed by quantitative or qualitative methods are called analytic characteristics. These may be qualitative or quantitative characteristics. Qualitative Characteristics The
The populations of different species living in the same habitat is called community. According to Oosting (1956). plant community is an aggregation of individuals with mutual relationships among themselves and to their environments. Thus community has two parts: Mutual Relationship among Individuals It includes
Multiple Choice Questions (MCQs) The number of indiyiduals living in a unit area is called: (a) Density (b) Natality (c) Mortality (d) Dispersion The rate at which the new individuals are added to a population in a unit time is: (a) Density (b) Natality
MODEL SUBJECTIVE QUESTION: What is population? Give its characteristics. Give history and background of population growth. Write note on seed dispersal. What is demography? Give its different aspects. Give applications of demography. SHORT QUESTION: Differentiate between Monospecific and Polyspecific population. Ans: Population of only
TERMS DEFINITIONS Population The number of individuals of specie living in the same area at the same time is called population. Monospecific Population of only one specie living in the same area then it is called Monospecifie. Mixed or Polyspecific Populations of different species
