aquatic organisms
21Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …
22Nekton — refers to the aggregate of actively swimming aquatic organisms in a body of water (usually oceans or lakes) able to move independently of water currents. Nekton are contrasted with plankton which refers to the aggregate of passively floating,… …
23Dispersion (biologie) —  Ne doit pas être confondu avec Distribution spatiale (écologie). Certaines graines très légères se laissent emporter par le vent, parfois sur de grandes distances. Il s agit souvent d espèce …
24Aquaculture — installations in southern Chile Aquaculture, also known as aquafarming, is the farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants …
25Glossary of environmental science — This is a glossary of environmental science.Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental science provides an integrated, quantitative, and… …
26List of R-phrases — R phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations . The list was consolidated and republished in… …
27Thermal pollution — is a temperature change in natural bodies of water caused by human influence. The temperature change can be upwards or downwards. In the Northern Hemisphere, a common cause of thermal pollution is the use of water as a coolant, especially in… …
28Roundup — Chembox new ImageFile = Glyphosate 2D skeletal.png ImageSize = ImageFile2 = Glyphosate 3D balls.png IUPACName = OtherNames =Glyphosate Section1 = Chembox Identifiers CASNo = 1071 83 6 PubChem = | SMILES = Section2 = Chembox Properties Formula =… …
29dipteran — /dip teuhr euhn/, adj. 1. dipterous (def. 1). n. 2. a dipterous insect. [1835 45; DIPTER(A) + AN] * * * Any member of the more than 85,000 species in the insect order Diptera (the two winged, or true, flies), characterized by the use of only one… …
30protozoan — /proh teuh zoh euhn/, n., pl. protozoans, (esp. collectively) protozoa / zoh euh/, adj. Biol. n. 1. any of a diverse group of eukaryotes, of the kingdom Protista, that are primarily unicellular, existing singly or aggregating into colonies, are… …
