### person | scientist | biologist:

Ecologist
* Many ecologists argue that predator numbers are controlled by the number of prey
  - feel that dams on big rivers have put numerous animal species in peril
  - view human overpopulation as the foundation of all environmental problems
* Most ecologists divide the year into six seasons that have no fixed dates
  - find life
  - identify stages
  - investigate interaction
  - involve in conservation
  - think that hunting was the cause, Anthropologists think climate change did it
  - work with mammals
* Some ecologists apply it in an abstract sense as a recurrent association of organisms.
* Some ecologists carry out experiments
  - scale field experiments
* Some ecologists combine experiments
  - concentrate on how a given species responds to physical factors
  - educate policy makers
  - find gardens
  - focus on the ecology of individual organisms
* Some ecologists identify nematodes
  - soil nematodes
  - investigate the effects of different land uses and management practices
* Some ecologists involve in agricultural technology
  - regard man as the planet s cancer
  - say that the best approach is to try to save the widest variety of species
  - see salvation in the power of hurricanes to move water and sediment
  - suggest that character displacement is due to past competition between the species
  - think that ecosystems never reach equilibrium because of frequent disturbances
  - think, that the universe is an eternal circular process
  - try to track responses of the environment due to human effects
  - utilize quantitative approaches
* acknowledge approaches
  - linear approaches
* also study how temperature influences the ecology and evolution of species
  - many kinds of environments
* also study the flow of energy and the cycling of nutrients
  - negative effects of human activities on the environment
  - use graphs called survivorship curves to show the relationship of age to survival
* analyze factors
  - various factors
* are a type of biologist, who study the basic functions of life
* are concerned about science education
  - with interrelations between biological communities and their habitat
* are interested in energy budgets of animals
  - phenotypes like seed number, body size
* are interested in the interactions between organisms
  - structure and function of ecosystems
  - where animals and plants live and how they interact with each other
  - irreplaceable informants in any society, whatever their political color
  - magazines
  - people
  - scientists
  - women
  - workers
* assign the organisms in ecosystems to categories called trophic levels.
* become professors or instructors at universities, colleges and private schools.
* call such organisms primary producers.
* can become consultants in business, industry, the military and other organizations
  - study ecological relationships at several differ-ent levels of organization
* construct energy pyramids based on the available energy at each trophic level.
* contribute significantly to our understanding and preservation of the natural world.
* define carrying capacity as the largest population an environment can support
  - complexity in terms of both individual species and functional groups
* devise approaches.
* distinguish between primary succession and secondary succession.
* divide freshwater ecosystems into bodies of running water and bodies of standing water.
* do much of their work outdoors and in laboratories.
* document occurrences.
* drool over Antarctica.
* explore the relationship between organisms and their environments.
* express great concern about engineered salmon.
* fear that the loss of variety leaves nature very vulnerable to any catastrophe.
  - that archaeology reveals information on environmental stability and change
* focus on factors.
* have much to contribute to the analysis of the global change problem
  - various ways of categorizing groups of living and non-living things
* includes arms
  - body substances
  - cell membranes
  - corpi
  - cytoplasm
  - heads
  - human bodies
  - legs
  - material bodies
  - necks
  - nuclei
  - personality
  - plasma membranes
  - sections
  - vacuoles
* look at factors.
* make further distinctions between the levels of consumption that occur in ecosystems.
* often work in teams with other scientists and government and business employees.
* provide basic information
* recognize two kinds of succession.
* refer to all living organisms in a given ecosystem as a community
  - mountains as areas of complex zonation because of the many ecosystems found
* say it can cause local extinctions and reduce biodiversity.
* seek experience.
* show factors.
* speak about 'ecotones' - which are places where different habitats come together
  - of conservation
* study Earth, home of living things
  - microbes
* study the interactions of organisms with their environment
  - natural changes in biodiversity at the genetic, species, and ecosystem levels
  - numbers of and interactions between organisms at several levels
* to understand behavior.
* typically distinguish between oceanic and inland waters
  - divide the ocean into zones based on depth and distance from shore
* use energy pyramids to show how energy decreases at each succeeding trophic level
  - food webs to better understand the intricate workings of the ecosystems they study
  - graphics to represent the flow of energy throughout the ecosystem
  - models to a. b. c. d. make predictions about the future behavior of an ecosystem
  - precise sampling techniques to determine dominance
  - the word environment to refer to all conditions, or factors, surrounding an organism
  - units to measure organisms within the quadrats
* usually assume that the colors of organisms are somehow matched to their environments.
* work to understand nature and to stem the tide of environmental degradation
* worry about increasing environmental pollution arising from economic growth.