Lecture 8 Ecosystem_ASR.ppt

Lecture 8 Ecosystem_ASR.ppt - Lecture-8 ECOSYSTEM Course...

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Lecture-8: ECOSYSTEM Course Instructor: Md Asif Rahman (ASR) Lecturer, Department of Mathematics and Natural Sciences (MNS) University Building 2 (15 th Floor) E-mail: [email protected]
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Ecology Ecology is the study of how organisms interact পরস্পররর উপর কক্রিযয়া ক রর with each other and with their non living environment. Species Species refers to the organisms that are resemble অন নরূপ হওযয়া to one another in terms of their appearance, behavior, chemistry and genetic makeup. Population Population is a group of interacting individuals of the same species living in a given area. Example: sunfish in a pond, white oak trees in a forest, people in a country. The place where a population (or an individual organism) normally lives is its habitat . It may be large as an ocean or as small as the intestine on a termite. Community Community consists of all populations of different species of plants, animals, and microorganisms living and interacting in an area.
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Ecosystem is a community of different species interact পরস্পররর উপর কক্রিযয়া ক রর with each other and with their non living environment. An ecosystem is formed by the interactions between all living and non-living components. Classification of Ecosystem In terms of origin ecosystems can be - natural : Sahara desert, Sundarban forest, Atlantic ocean. - artificial (human created) : crop fields, farm, ponds.
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In terms of their location ecosystems can be Terrestrial ecosystem : related to land Forest Mountain Desert Grassland Urban ecosystem Aquatic ecosystem : related to water Marine- Ocean Freshwater- ponds, lakes, rivers etc.
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