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Glossary: bioball

February 24th, 2012 — 3:28pm

Type of biological filter medium consisting of a plastic ball designed in such a way that the available  surface area for bacterial colonisation is maximised. The precise form differs depending on manufacturer.

Glossary: biocenose

February 15th, 2012 — 2:18pm

A group of organisms forming a self-sufficient ecological community in a particular habitat.

Glossary: biochemistry

February 15th, 2012 — 2:18pm

The chemical composition of an organism, living system or biological entity; the study of chemical substances and processes occurring within living organisms.

Glossary: biocide

February 15th, 2012 — 2:18pm

A chemical agent that is toxic or lethal to living organisms.

Glossary: biodiversity

February 15th, 2012 — 2:18pm

The number, variety, and genetic variation of organisms found within a specified geographic region, both within and between species and ecosystems. Often used as a measure of overall ecosystem health.

Glossary: bioerosion

February 15th, 2012 — 2:18pm

Erosion of oceanic or terrestrial substrates by living organisms.

Glossary: biofilm

February 15th, 2012 — 2:18pm

Aggregate of microorganisms adhering to one another and forming a complex, carpeting structure on living or non-living solid surfaces. Often associated with surfaces that are submerged or regularly in contact with water.

Glossary: biofilter

February 15th, 2012 — 2:18pm

Pollution control technique employing living matter to capture and biologically degrade potential pollutants. Aquarium biofilters tend to contain a medium with a large specific surface area (SSA) favouring colonisation by billions of beneficial microorganisms.

Glossary: biogeography

February 15th, 2012 — 2:18pm

Study of the geographic distribution of plants, animals and ecosystems in both space and geological time.

Glossary: biological filtration

February 15th, 2012 — 2:18pm

See biofilter.

Glossary: biological species concept

February 16th, 2012 — 4:14pm

Most popular concept of species in vertebrate zoology. Defines species¬†as members of populations that do or potentially could interbreed and produce fertile offspring in nature, regardless of appearance, therefore somewhat more restrictive than the phylogenetic species concept. In theory species are thus separated from one another by some form of reproductive isolation, though in practice […]

Glossary: bioluminescence

February 15th, 2012 — 2:18pm

Emission of visible light by living organisms including certain fishes.

Glossary: biomass

February 15th, 2012 — 2:18pm

The total mass of living matter present in a given individual, habitat, population, or sample.

Glossary: biome

February 15th, 2012 — 2:18pm

A major regional or global biotic community normally characterised by the dominant vegetation and local climatic conditions, e.g., deserts, tropical rainforests, tundra. The two major aquatic biomes are freshwater and marine but these are often broken down into less-generalised categories.

Glossary: biometrics

February 15th, 2012 — 2:18pm

Statistical study of biological data and phenomena.

Glossary: bioregion

February 15th, 2012 — 2:18pm

A biological region defined by characteristics of the natural environment rather than by man-made divisions and tending to contain distinctive flora, fauna and ecosystems. Also known as 'ecoregion'.

Glossary: biota

February 15th, 2012 — 2:18pm

The living organisms inhabiting a given region.

Glossary: biotic

February 15th, 2012 — 2:18pm

Consisiting of, associated with or derived from living organisms. Biotic factors in an environment include the organisms themselves plus predation, competition and other interrelationships.

Glossary: biotope

February 15th, 2012 — 2:18pm

An area of uniform environmental conditions and species distribution containing a specific assemblage of plants and animals. Similar to 'habitat' but refers to a biological community rather than a single species or population.

Glossary: biotope aquarium

February 15th, 2012 — 2:18pm

Arguably misapplied term used fashionably when describing an aquarium set up to resemble the natural habitat of specific fish(es) including replication of water chemistry, vegetation and sympatric fish species.