Ecosystems in Biological Definition

Biodiversity

... diversity among organisms present in different ecosystems . "Diversity" in this definition includes ... is the totality of genes, species, and ecosystems of a region . An advantage of this definition is ... alia , terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are ...

Marine biology

... of animal and plant life within saltwater ecosystems . Given that in biology many phyla , families ... carbon cycle ) and movement of energy through ecosystems is also growing, despite large areas beneath the ... end of the scale, the role of viruses in marine ecosystems is barely being explored even in the beginning of ...

Adaptive radiation

... change is the rapid spread and development of mammalian species after the extinction of the dinosaurs. Archipelagoes . Isolated ecosystems , such as islands and mountain areas, can be colonized by a new species which upon establishing itself undergoes rapid divergent evolution. Darwin's ...

Biology

... as the other organisms which share its habitat. Ecological systems are studied at several different levels from individuals and populations to ecosystems and biosphere level. Ecology is a multi-disciplinary science, drawing on many other branches of science. Ethology studies animal behavior ...

Botany

... , tissues , organs and the biodiversity of whole plants. At the top end of this scale, plants can be studied in populations, communities and ecosystems (as in ecology ). At each of these levels a botanist might be concerned with the classification ( taxonomy ), structure ( anatomy ), or function ( ...

Competitive exclusion principle

... from abstract mathematical modeling . The conditions under which competitive exclusion must hold are not very well understood; several natural ecosystems are known in which competitive exclusion seems to be violated. The best known example is the paradox of the plankton (or short plankton paradox ...

Cryptozoology

... point these out to demonstrate that there are many unexplored regions of the world left, and that remote exotic locations or specialized ecosystems relatively untouched by man may contain unexpected life. Similarly cited is the 1976 discovery of the previously unknown megamouth shark , ...

Evolution

... years ago, plants and fungi colonized the land, and were soon followed by arthropods and other animals, leading to the development of land ecosystems with which we are familiar. The emergence of novel traits Mechanisms of inheritance In Darwin's time, scientists did not share broad ...

Limnology

... , Limnology (Prentice Hall , 2001) B. Moss , Ecology of Fresh Waters ( Blackwell , 1998) Robert G. Wetzel , Limnology: Lake and River ecosystems , 3rd ed. (Academic Press , 2001) ISBN 0127447601 - highly regarded Robert G. Wetzel & Gene E. Likens , Limnological Analyses , 3rd ed. ( ...

Macroecology

... of New Mexico and Brian Maurer of Michigan State University in a 1989 paper in Science . Macroecology approaches the idea of studying ecosystems using a "top down" approach. It seeks understanding through the study of the properties of the system as a whole; Kevin Gaston and Tim Blackburn ...

Microorganism

... , they cause infections . Microorganisms were probably the first form of life that appeared on Earth. Today they have an important place in all ecosystems and in most higher-order multicellular organisms. For mankind they are important for participating in driving the earth's main element cycles, and ...

Paleontology

... how long-term physical changes of global geography (" paleogeography ") and climate (" paleoclimate ") have affected the evolution of life, how ecosystems have responded to these changes and have changed the planetary environment in turn, and how these mutual responses have affected today's patterns of ...