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01Oct 2018 by admin

Essay on Animal Populations (933 Words)

Ecology

Here is your essay on Animal Populations !The inherent tendency of all animal populations is to increase in number. But this increase in number is however, not infinite since the carrying capacity of the environment always imposes restriction upon it.Thus, after reaching the carrying capacity level, the population density tends to fluctuate above and below this level and such fluctuation in population between upper and lower limits tends to give some stability to the population. The nature of the processes that regulate the numbers of animals is a major problem of population ecology. image source: i.ytimg.com ADVERTISEMENTS: Many groups of animals are provided with unique and intrinsic self-regulatory mechanism such as failure of reproduction and self-inflicted mortality for controlling the size of the population. Populations grow when natality exceeds mortality,…

01Oct 2018 by admin

Important Types of Succession Established in an Ecosystem | Essay

Ecosystem

Essay on the Important Types of Succession established in an Ecosystem !The first organisms to become established in an ecosystem undergoing succession are known as pioneers; the stable community that ends the succession is termed the climax community.The whole series of communities which are involved in the ecological succession at a given area, such as from grass to shrub to forest, and which terminates in a final stable climax community, is called a sere and each of the changes that take place is a seral stage, Each seral stage is a community, although temporary, with its own characteristics and it may remain for a very short time or for many years. image source: fredonia.edu ADVERTISEMENTS: Seres are sometimes classified according to the predominant force that is bringing them about. These…

01Oct 2018 by admin

Short Speech on Ecology | For School Students

Ecology

Here is your speech on Ecology for school and college students !Ecology is a vast and encyclopedic biological subject. To a beginner, at the outset, ecology may appear to be quite confusing and discouraging because it seems so diffuse and incoherent. image source: cgpauk.com ADVERTISEMENTS: After all, it must take into account the life habits of over two million different kinds of animals and plants and it considers all manner of influence and interactions among them. Fortunately, however, the innumerable facts of ecology can be distilled into following some relatively basic and simple principles:The ecology is the study of ecosystems or the totality of the reciprocal interactions between living organisms and their environment. The term organism refers to an individual unit constituted to carry on the activities of life.It is…

01Oct 2018 by admin

Essay on Autecology and Synecology ! (526 Words)

Ecology

Here is your essay on Autecology and Synecology !As discuss earlier in both plant and animal ecology are artificially divided into two parts, synecology and autecology. A brief comparison of these two ecological subdivisions will explain the basic significance of each of them. Autecology is concerned with the study of the interrelations of individual organisms with the environment.Synecology is concerned with the study of groups of organisms—the community, hence, it is also called community ecology. Both have developed independently, although the knowledge of both of them is necessary for the understanding of the individual, population, or ecosystem. Autecology is experimental and inductive. Synecology is philosophical and deductive. image source: upload.wikimedia.org ADVERTISEMENTS: Autecology because it is concerned with the relationship of an organism to one or more variables such as light,…

01Oct 2018 by admin

Growth of Niche Concept and Types of Niches | Essay

Ecology

Essay on the Growth of Niche Concept and Types of Niches !Although Steere (1894) appreciated the niches in his explanation of the way bird species within a genus were segregated on different islands in the Philippines, the term and concept were really first developed by American ornithologist Joseph Grinnell (1917, 1924, 1928). image source: inman.com ADVERTISEMENTS: In his study of California thrashers and other birds he suggested that the niche be regarded as the ultimate distributional or spatial unit occupied by just one species, or subspecies, to which that species is held by structural and instinctive limitations, such as climatic factors, kind and amount of food, suitable nesting sites and cover.Thus, he considered the niche as a subdivision of habitat (Udvardy, 1957) or microhabitat (Odum, 1971), or habitat (Smith, 1977).…

01Oct 2018 by admin

Important Methods of Detection and Measurement of Air Pollution

Air Pollution

Essay on Important Methods of Detection and Measurement of Air Pollution !Air pollution is usually measured by sampling of air by thermal and by electrostatic precipitation, Sonkin impactor and electrostatic dust collectors. image source: d.fastcompany.net ADVERTISEMENTS: Table 251. Common air pollutants, their sources and pathological effects on man (after Southwick, 1976):PollutantsWhere they come from (source)Pathological effect on man 1. AldehydesThermal decomposition of fats, oil, or glycerol.Irritate nasal and respiratory tracts. 2. AmmoniasChemical processes—dye- making; explosives; lacquer; fertilizer.Inflame upper respiratory passages. 3. ArsinesProcesses involving metals or acids containing arsenic soldering.Break down red cells in blood, damage kidneys; cause jaundice. 4. Carbon monoxidesGasoline motor exhausts; burning of coal.Reduce oxygen-carrying capacity of blood. 5. ChlorinesBleaching cotton and flour; many other chemical processes.Attack entire respiratory tract and mucous membranes of eyes; cause pulmonary edema:…

01Oct 2018 by admin

Essay on the Chemical Properties of Water (1279 Words)

Ecosystem

Here is your Essay on the Chemical Properties of Water !Water consists primarily of a single compound, H2O. It is a universal solvent and most chemical compounds ionize readily in water and provide many radicals and considerable versatility in the rearrangement of chemical substances. image source: marisakendall.com ADVERTISEMENTS: It has following chemical properties. Solubility of Gases in Water: Most gases dissolve readily in water, most notably those that are essential for life. The concentration of any gas in water generally varies between zero and a theoretical maximum or saturation. The latter is the amount of gas that can be dissolved in water when the atmosphere and the water are in equilibrium with one another.Except for waterfalls and very turbulent streams, the water in natural ecosystem is seldom in equilibrium with…

01Oct 2018 by admin

Best Speech Ever Given on Ecology !

Ecology

Here is your Speech on Ecology !Conventionally, ecology has been defined variously by different classical and modern ecologists with different viewpoints. Quite oddly, no universally accepted definition of ecology has been formulated by any ecologist so far, and for the better understanding of scope, limitations, purpose, and mode of study of different ecological phenomena, one has to go through following chronologically arranged definitions of ecology:Ernst Haeckel (1866) defined ecology “as the body of knowledge concerning the economy of nature—the investigation of the total relations of animal to its inorganic and organic environment. image source: upload.wikimedia.org ADVERTISEMENTS: An American plant ecologist, Frederick Clements (1916) considered ecology to be “the science of community.” British ecologist Charles Elton (1927) defined ecology as “the scientific natural history concerned with the sociology and economics of…

01Oct 2018 by admin

Essay on Literature concerning Ecology!

Ecology

Here is your essay on Literature concerning Ecology !The beginnings of ecological knowledge for modern man lay in the development of biology and medicine as scientific disciplines the fourth century Greek, Hippocrates (460-377? B.C.), often called ‘he “Father of Medicine”, emphasised certain ecological factors in the genesis of health and disease. image source: cgpauk.com ADVERTISEMENTS: His work, “On Airs, Waters and Places” was environmental in emphasis—'”whoever wishes to investigate medicine properly, should proceed thus: in the first place to consider the seasons of year, and what affects each of them produces……. Then the winds, the hot and cold … the qualities of waters, for as they differ from one another in taste and weight…………”Another Greek philosopher Aristotle (384-322 B.C.), sometimes referred to as the “Father of Biology”, classified animals according…

01Oct 2018 by admin

Biological Significance of increasing Complexity and Organization in Living Beings | Essay

Environment

Essay on the Biological Significance of increasing Complexity and Organization in Living Beings !The trend of increasing complexity and organisation from lower level toward higher one produces following new properties: cooperation, division of labour and specialization. image source: anatomyandphysiologyi.com ADVERTISEMENTS: One property which arises at each new higher level of organisation is united, integrated function. Disunited structure means independent function and by extension, competition; while united structure means joint function and by extension, cooperation. For example, the cells can remain structurally independent and can compete for space and raw materials. But if they form a multicellular unit, they surrender their independence and become a cooperative, integrated system.The fundamental advantage of cooperation is operational efficiency: the cooperating whole is more efficient in performing the functions of life than its lower-level components…