An argument for the conservation of nature on the grounds that nature is beautiful and beauty is important and valuable to people
largest number of individuals of a population that a environment can support, largest number of individuals of a population that a environment can support
an argument based on the idea that there is a value to a certain factor that my not benefit an individual directly but is crucial for maintaining the species
States that the environment on a global level has been changed for the better by life over the history of life on earth.
Cities, mostly characteristic of the developing world, where high population growth and migration have caused them to explode in population since World War II. All megacities are plagued by chaotic and unplanned growth, terrible pollution, and widespread poverty.
When a threat is of serious environmental damage, we should not wait for scientific proof before taking action.
The ability of an ecosystem to maintain stability among its biological resources so that there is a steady optimun yield
Sees some aspect of the environment as valuable because it benefits individuals economically or are necessary for human survival
a test of the effect of a single variable by changing it while keeping all other variables the same
condition that insures the manipulated variable actually caused an observed change in the responding variable
the experimental factor that is manipulated; the variable whose effect is being studied
factor in an experiment that a scientist purposely changes; also known as independent variable
a personal experience as seen through one of the senses, influenced by background knowledge and personal experiences
clear, precise definitions and instructions about how to observe and measure concepts and variables
Ideas that are claimed to have scientific validity, but are inherently untestable and/ or lack empirical support and/ or were arrived at through faulty reasoning or poor scientific methodolog
Data associated with a more humanistic approach to geography, often collected through interviews, empirical observations, or the interpretation of texts, artwork, old maps
Data represented as numerical figures that can be expressed in numerical terms, counted, or compared on a scale
factor in an experiment that a scientist wants to observe, which may change in response to the manipulated variable; also known as a dependent variable
a method of investigation involving observation and theory to test scientific hypotheses
a widely accepted explanatory idea that is broad in scope and supported by a large body of evidence
the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist
a system formed by the interaction of a community of organisms with their physical environment
growth pattern in which the individuals in a population reproduce at a constant rate
overshoot and collapse
This occurs when growth in one part of a system over time exceeds carrying capacity, resulting in sudden decline in one or both parts of the system.
is the idea that the geologic processes that operate today also operated in the past
change in a population from high birth and death rates to low birth and death rates
human carrying capacity
Theoretical estimates of the numbers of humans who could inhabit Earth at the same time
The estimated average number of years (or other time period used as a measure) that an individual of a specific age can expect to live.
logistic carrying capacity
in terms of the logistic curve, the population size at which births equal deaths and there is no net change in the population
logistic growth curve
phase A is exponental growth, Phase B is when population reaches carrying capacity and stops increasing rapidly
genetically determined maximum possible age to which an individual of a species can live
the cycling of chemical elements or compounds through the atmosphere, hydrosphere, biosphere, and lithosphere
The cycling of carbon over long period of time, which gets involved with the cycling of silicon.
the circulation and reutilization of carbon atoms especially via the process of photosynthesis and respiration.
the process by which one or more substances change to produce one or more different substances
process in which fixed nitrogen compounds are converted back into nitrogen gas and returned to the atmosphere
four sequences of Earth processes: the hydrologic, rock, tectonic, and geochemical cycles
the natural process by which water is purified and made fresh through evaporation and precipitation. The cycle provides all the fresh water available for biological life.
condition that restricts a population's growth, such a space, disease, and food availability.
Nutrients required in small or trace amounts. Some examples are phosphorus, sulfur, and potassium.
Missing Carbon Sink
Substantial amounts of carbon dioxide released into the atmosphere but apparently not reabsorbed and thus remaining unaccounted for.
Cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment
the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle
sequence of events in which rocks are formed, destroyed, altered, and reformed by geological processes
Community Level Interactions
the indirect and complicated interactions within a community. Ex: a predator feeding on its prey, which feeds on autotrophs
organisms that break down wastes and dead organisms and return raw materials to the environment
A group of populations of different species living in the same area with varying degrees of interactions with others
a species whose impact on its community or ecosystem are much larger and more influential than would be expected from mere abundance
the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established
organism that represents a feeding step in the movement of energy and materials through an ecosystem
A boundary of an ecosystem on land; within this area all the water that reaches this area will flow out the same stream
The variety and complexity of species present and interacting in an ecosystem and the relative abundance of each.
Basically, the theory that present days species developed from earlier, very different species over the course of earth's history.
Competitive Exclusion Principle
ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time
(ecology) the status of an organism within its environment and community (affecting its survival as a species)
a natural process resulting in the evolution of organisms best adapted to the environment