Languages:
Bottom dwelling; living on or under the sediments or other substrate [in an aquatic system].
Biodiversity is a contraction of biological diversity. Biodiversity reflects the number, variety and variability of living organisms.
It includes diversity within species (genetic diversity), between species (species diversity), and between ecosystems (ecosystem diversity). (Source: GreenFacts)
A colorless, odorless, non-combustible gas, present in low concentrations in the air we breathe (about three hundredths of one percent by volume).
Carbon dioxide is produced when any substance containing carbon is burned. It
is also a product of breathing and fermentation. Plants absorb carbon dioxide
through photosynthesis.
(Source: The Pacific Forest Trust
Glossary
An electric charge (q or Q) is the quantity of unbalanced electricity in an object (either positive or negative). It is interpreted as an excess or deficiency of electrons. Matter that possesses a charge is influenced by and produces electromagnetic fields.
Electrons, by convention have an elementary charge of -1. Ions are either positively or negatively charged. The unit of measurement of the charge of an object is the coulomb, which represents 6.24 x 1018 elementary charges. (Source: GreenFacts)
Effects in the developing offspring due to exposure before conception (either
parent), prenatally, or postnatally to the time of sexual maturation.
Developmental effects may be expressed at any time in the life span of the
organism. Developmental effects are a subset of reproductive effects.
(Source:
CSIRO
CSIRO biological effects and safety of EMR
Glossary
The benefits people obtain from ecosystems.
These include provisioning services such as food and water; regulating
services such as flood and disease control; cultural services such as spiritual,
recreational, and cultural benefits; and supporting services such as nutrient
cycling that maintain the conditions for life on Earth.
(Source:
MA
The complex system of plant, animal, fungal, and microorganism communities and their associated non-living environment interacting as an ecological unit.
Ecosystems have no fixed boundaries; instead their parameters are set to the
scientific, management, or policy question being examined. Depending upon the
purpose of analysis, a single lake, a
watershed, or an entire region could be
considered an ecosystem.
(Source:
US EPA
Glossary of Climate Change Terms
Water that is not salty, for instance water found in lakes, streams, and rivers, but not the ocean. Also used to refer to things living in or related to freshwater (e.g., "freshwater fish"). (Source: GreenFacts)
Greenhouse gases are those gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of infrared radiation emitted by the Earth’s surface, the atmosphere and clouds.
This property causes the greenhouse effect.
Water vapour (H2O), carbon dioxide (CO2),
nitrous oxide (N2O), methane (CH4), and
ozone (O3) are the primary greenhouse gases
in the Earth’s atmosphere. Moreover there are a number of entirely human-made
greenhouse gases in the atmosphere, such as the halocarbons and other
chlorine and bromine containing substances,
dealt with under the Montreal Protocol. Beside CO2, N2O and CH4, the
Kyoto Protocol deals with the greenhouse gases
sulphur hexafluoride (SF6),
hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs).
(Source:
IPCC
Glossary
Water beneath the Earth's surface in the spaces between soil particles and
between rock surfaces.
(Source:
ATSDR
Glossary of
Terms
An area of land that contains a mosaic of ecosystems, including human-dominated ecosystems.
The term cultural landscape is often used when referring to
landscapes containing significant human populations or in which there has been
significant human influence on the land.
(Source:
MA
The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) and tonne (t).
| 1000 g = 1 kg |
| 1000 kg = 1 tonne |
Adding prefixes of the International System of Units (SI) allows to express weight as multiples or fractions of 1 gram:
| 1 gigatonne | (Gt) | =1 000 000 000 000 000 g |
| 1 megatonne | (Mt) | =1 000 000 000 000 g |
| 1 tonne | (t) | =1 000 000 g |
| 1 kilogram | (kg) | =1 000 g |
| 1 gram | (g) | =1 g |
| 1 milligram | (mg) | =0.001 g |
| 1 microgram | (µg) | =0.000 001 g |
| 1 nanogram | (ng) | =0.000 000 001 g |
| 1 picogram | (pg) | =0.000 000 000 001g |
Imperial and US weight units can also be expressed as metric units:
| Metric units | ||
| 1 US ton | (ton) | =0.907 tonne |
| 1 UK ton | (ton) | =1.016 tonne |
| 1 lb | (pound) | =453.59 g |
| 1 oz | (ounce) | =28.35g |
Further information on the International System of Units (SI) is provided by
the International Bureau of Weights and Measures (BIPM)
www.bipm.org/en/si/
pH is a measure of the concentration of protons (H+) in a solution and, therefore, its acidity or alkalinity. The concept was introduced by S.P.L. Sørensen in 1909. The p stands for the German "Potenz", meaning power or concentration, and the H for the hydrogen ion (H+). In layman's terms , the "pH" value is an approximate number between 0 and 14 that indicates whether a solution is acidic (pH < 7), basic (pH > 7) or neither (pH = 7) [neutral]. (Source: GreenFacts )
A group or number of people living within a specified area or sharing similar
characteristics (such as occupation or age).
(Source:
ATSDR
Glossary of
Terms
Primary particles are directly released into the atmosphere by wind, combustion processes, or human activities.
Secondary particles are those that form in the atmosphere from other gaseous pollutants, particularly sulfur dioxide, nitrogen oxides, ammonia, and volatile organic compounds. (Source: GreenFacts)
Sodium is an essential element (chemical formula: Na) that the body needs to function properly, in order to regulate blood pressure and blood volume and for the functioning of muscles and nerves.
Sodium occurs naturally in most foods, mainly as sodium chloride (NaCl), but also in other forms such as sodium nitrate, sodium phosphate, or sodium glutamate. (Source: GreenFacts)
Storm surge is a rise in coastal water level caused by a regional low pressure area and water pushed toward coastal shores by prolonged wind forces.
A storm surge can significantly raise the mean water level if combined with
astronomical high tides. This rise in water level can cause severe flooding on
coastal areas, particularly along shallow slopes along the shoreline.
(Source: British Columbia Flood Hazard Definitions
A characteristic or state whereby the needs of the present and local population can be met without compromising the ability of future generations or populations in other locations to meet their needs.
The Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP) is an advisory body, established in 1969, that advises the United Nations (UN) system on the scientific aspects of marine environmental protection.
At present GESAMP is jointly sponsored by nine UN organizations with responsibilities relating to the marine environment, and they utilize GESAMP as a mechanism for coordination and collaboration among them. GESAMP functions are to conduct and support marine environmental assessments, to undertake in-depth studies, analyses, and reviews of specific topics, and to identify emerging issues regarding the state of the marine environment. GESAMP itself today consists of 16 experts, drawn from a wide range of relevant disciplines, who act in an independent and individual capacity. Studies and assessments are usually carried out by dedicated working groups, most of whose members are not sitting members of GESAMP but part of the broader GESAMP network.
GESAMP's UN sponsors: IMO, FAO, UNESCO-IOC, WMO, IAEA, UN, UNEP, UNIDO, UNDP.GESAMP
Source:
(Source:
www.gesamp.org/about
The level of magnitude of a system process at which sudden or rapid change
occurs.
(Source:
PhysicalGeography.net
Glossary of
terms
"The United Nations Environment Programme (UNEP), established in 1972, works to encourage sustainable development through sound environmental practices everywhere. Its activities cover (...) the promotion of environmental science and information, to an early warning and emergency response capacity to deal with environmental disasters and emergencies."
See also UNEP.Net
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