Topic outline of ecology

:"For a more comprehensive list, see the List of ecology topics."

Ecology, or ecological science, is the scientific study of the distribution and abundance of living organisms and how the distribution and abundance are affected by interactions between the organisms and their environment. The environment of an organism includes both physical properties, which can be described as the sum of local abiotic factors such as solar insolation, climate and geology, as well as the other organisms that share its habitat.

The following outline is provided as an overview of and introduction to ecology:

Essence of ecology

: "Main article: Ecology"

Subdisciplines of ecology, and subdiscipline classification

Ecology is a broad discipline comprising many sub-disciplines. The field of ecology can be sub-divided according to several classification schemes:

By level of complexity or scope

Arranged from lowest to highest complexity:

* Ecophysiology and Behavioral ecology examine adaptations of the individual to its environment.
* Population ecology studies the dynamics of populations of a single species.
* Community ecology (or synecology) focuses on the interactions between species within an ecological community.
* Ecosystem ecology studies the flows of energy and matter through the biotic and abiotic components of ecosystems.
* Systems ecology is an interdisciplinary field focusing on the study, development, and organization of ecological systems from a holistic perspective.
* Landscape ecology examines processes and relationship across multiple ecosystems or very large geographic areas.

By organisms under study

* Animal ecology
* Biogeography - the study of the geographic distributions of species ;
* Insect ecology
* Microbial ecology - the ecology of micro-organisms;
* Paleoecology - which seeks to understand the relationships between species in fossil assemblages;
* Plant ecology -

By biome under study

* Benthic ecology - study of sea-floor organisms, and their interaction with each other and with the environment
* Desert ecology -
* Forest ecology -
* Grassland ecology -
* Marine ecology - and aquatic ecology, where the dominant environmental milieu is water;
* Urban ecology - the study of ecosystems in urban areas.

By geographic or climatic area under study

* Arctic ecology -
* Polar ecology -
* Tropical ecology -

By spatial scale under study

* Global ecology - which examines ecological phenomena at the largest possible scale, addressing macroecological questions;
* Landscape ecology - which studies the interactions between discrete elements of a landscape;
* Macroecology - the study of large scale phenomena;
* Microecology - the study of small scale phenomena;
* Molecular ecology -

By ecological aspects or phenomena under investigation

* Chemical ecology - which deals with the ecological role of biological chemicals used in a wide range of areas including defense against predators and attraction of mates;
* Ecophysiology - which studies the interaction of physiological traits with the abiotic environment;
* Ecotoxicology - which looks at the ecological role of toxic chemicals (often pollutants, but also naturally occurring compounds);
* Evolutionary ecology - or ecoevolution which looks at evolutionary changes in the context of the populations and communities in which the organisms exist;
* Fire ecology - which looks at the role of fire in the environment of plants and animals and its effect on ecological communities;
* Functional ecology - the study of the roles, or functions, that certain species (or groups thereof) play in an ecosystem;
* Genetic ecology -
* Soil ecology - the ecology of the pedosphere;

By technique used for investigation

* Field ecology
* Statistical ecology
* Theoretical ecology - the development of ecological theory, usually with mathematical, statistical and/or computer modeling tools;

By philosophical approach

* Systems ecology
* Applied ecology - the practice of employing ecological principles and understanding to solve real world problems (includes agroecology and conservation biology);
* Conservation ecology - which studies how to reduce the risk of species extinction;
* Restoration ecology - which attempts to understand the ecological basis needed to restore impaired or damaged ecosystems;

Ecology-involved interdisciplinary fields

* Biogeochemistry - effect of biota on global chemistry, and the cycles of matter and energy that transport the Earth's chemical components in time and space.
* Ecological design -
* Ecological economics -
* Ecological engineering -
* Festive ecology -
* Human ecology -
* Ecological anthropology -
* Social ecology -
* Ecological health -
* Environmental psychology -

Biogeographic regions

thumb|400px|right|Map_of_six_of_the_worldlegend|#f9f9f9|Oceania and Antarctic ecozones not shown

* Biosphere

Ecozone

The World Wildlife Fund (WWF) developed a system of eight biogeographic realms (ecozones):
* Nearctic 22.9 mil. km² (including most of North America)
* Palearctic 54.1 mil. km² (including the bulk of Eurasia and North Africa)
* Afrotropic 22.1 mil. km² (including Sub-Saharan Africa)
* Indomalaya 7.5 mil. km² (including the South Asian subcontinent and Southeast Asia)
* Australasia 7.7 mil. km² (including Australia, New Guinea, and neighbouring islands). The northern boundary of this zone is known as the Wallace line.
* Neotropic 19.0 mil. km² (including South America and the Caribbean)
* Oceania 1.0 mil. km² (including Polynesia, Fiji and Micronesia)
* Antarctic 0.3 mil. km² (including Antarctica).

Ecoregions

Ecozones are further divided into ecoregions. The World has over 800 terrestrial ecoregions. "See Lists of ecoregions by country."

History of ecology

: "Main article: History of ecology"

* History of human ecology

Basic ecology concepts

* Autotroph
* Bacteria
* Biomes
* Biodegradable
* Biodiversity
* Bioinvader
* Biocoenosis
* Biomass
* Biome
* Biotic material
* Carbon cycle
* Carrying capacity
* Climate
* Climate change
* Competitive exclusion principle
* Decomposition
* Deep ecology
* Desert ecology
* Detritus
* Ecological collapse
* Ecological community
** Community (ecology)
** Ecovillage
* Ecological crisis
* Ecological debt
* Ecological deficit
* Ecological extinction
* Ecological facilitation
* Ecological footprint
* Ecological niche
* Ecological selection
* Ecological succession
* Ecological yield
* Ecology movement
* Ecophagy
* Ecosophy
* Ecosystem
* Ecosystem valuation
* Environmentalism
* Environmental impact assessment
* Environmental management
* Gaia hypothesis
* Global warming
* Greenhouse effect
* Green movement
* Green party
* Green politics
* Human ecology
* Industrial ecology
* Microbial ecology
* Monoculture
* Natural capital
* Natural environment
* Natural resource
* Nature
* Organic matter
* Over-consumption
* Pollution
* Pioneer species
* Primary succession
* Secondary succession
* Species
* Supertramp
* Sustainability

Ecology lists

: "Main article: List of ecology topics"

See also

* Biology
** List of basic biology topics
** List of biology topics

External links

* [http://www.barrameda.com.ar/ecology What is Ecology?]
* [http://www.econguru.com/fundamentals_of_ecology/ Fundamentals of Ecology] Textbook-style investigation to the economy of nature, breaks down in 4 chapters from Population to Ecosystem.
* [http://plato.stanford.edu/entries/ecology/ Ecology (Stanford Encyclopedia of Philosophy)]