However, making sense of the diverse patterns and extensive variability reported in the literature has been difficult because there has been no unifying conceptual framework to guide research. Xerosere (Xerach):- Succession on dry habitat:- Abstract Edge effects have been studied for decades because they are a key component to understanding how landscape structure influences habitat quality. Here environmental factor play a major role in replacement of community. Autogenic succession :- When environmental factors do not play any role in replacement of community i.e.Imp:- 1 ° succession take much more time with respect to 2 ° succession because 1 ° succession mainly involve in formation of soil. Succession on 2 Bared area or destroyed community. Primary succession (Prisere) :- Succession on primary bared (previously sterile area). (e) Seral stage or serol community:- It is community sequence from pioneer to climax community. Ecotone has been defined, explained, and identified by many scientists in various ways 1,2,3.In a nutshell and from a soil science point of view, they are dynamic boundaries where soil physical and chemical properties (e.g., pH, salinity, capillary water, air capacity) change gradually due to the change in habitat and biodiversity 4,5,6,7. (d) Climax community:- Form community at last on bared. land and water).The edge effect is an ecological concept that describes how there is a greater diversity of life in the region where the edges two adjacent ecosystems overlap, such as land/water, or forest/grassland. or between different landscape elements (e.g. (c) Pioneer community:- First form community on bared area. Ecotone is a transitional area of convergence between two diverse ecosystems. (b) Pionur species:- Species with first to invade bared land area usually lichen and mosses. (a) Sere:- Entire sequence of succession from pioneer to climax community. Direction of succession is always unidirectional. It is seen that sometimes the population density of some species in the ecotone is higher than any other community and this effect is known to be an edge effect. of time in border of community or ecotone.Įcological Succession :- It is successful replacement of one community by another community over the long period of time. Edge Effect Edge Species When there is a change in population size or community structure that occurs at the boundary of two habitats then it is known as the edge effect. Organism have tendency to increase their population and diversity in transistional zone or Border of community or ecotone. It is transistional zone between two adjacent community.