The deposition of nitric or sulfuric acid, either in rain (acid rain) or in the form of dry particles, as a result of the production of nitrogen oxides or sulfur dioxide through burning, primarily of fossil fuels.
A underground deposit of fresh water, often used as a source for irrigation.
.Literally, "self - feeder"; normally,a photosynthetic organism; a producer.
Able to be broken down into harmless substances by decomposers.
The pathways of a specific nutrient (such as carbon, nitrogen, phosphorus, or water) through the living and the nonliving proportions of an ecosystem; also called a nutrient cycle.
The increasing accumulation of a toxic substance in progressively higher trophic levels.
The total weight of all living materials within a defined area.
The biological cycle by which carbon moves from its reservoirs in the atmosphere and oceans through producers and into higher trophic levels, and then back to its reservoirs.
Literally, "meat eater"; a predatory organism that feeds on herbivores or on other carnivores; a secondary (or higher) consumer.
An organism that eats other organisms; a heterotroph.
an organism, usually a fungus or bacterium, that digest organic material by secreting digestive enzymes into the environment, in the process liberating nutrients into the environment.
The excessive cutting of forests. In recent years, deforestation has occurred primarily in rain forests in the Tropics, to clear space for agriculture.
Bacteria that break down nitrates, releasing nitrogen gas to the atmosphere.
One of a diverse group of organisms, ranging from worms to vultures, that live off the waste and dead remains of other organisms.
A graphical representation of the energy contained in succeeding trophic levels, with maximum energy at the base (primarily producers) and steadily diminishing amounts at higher levels.
A wetland formed where a river meets the ocean; the salinity is quite variable, but lower than in seawater and higher than in fresh water.
.A linear feeding relationship in a community, using a single representative from each of the trophic levels.
A representation of the complex feeding relationship within a community, including many organisms at various trophic levels, with many of the consumers occupying more than one level simultaneously.
A fuel as coal, oil, and natural gas, derived from the remains of ancient organisms.
A gradual rise in global warming atmospheric temperature as a result of an amplification of the natural greenhouse effect due to human activities.
.The process in which certain gases such as carbon dioxide and methane trap sunlight energy in a planet's atmosphere s heat; the glass in a greenhouse does the same. The result, global warming, is being enhanced by the production of these gases by humans.
A gas, such as carbon dioxide or methane, that traps sunlight energy in a planet's atmosphere as heat; a gas that participates in the greenhouse effect.
.Literally, "plant - eater"; an organism that feeds directly and exclusively on producers; a primary consumer.
Literally, "other - feeder "; an organism that eats other organisms; a consumer.
The biological cycle by which water travels from its major reservoirs, the ocean, through the atmosphere to reservoirs in freshwater lakes, rivers and groundwater, and back into the oceans. The hydrologic cycle is driven by solar energy. Nearly all water remains as water throughout the cycle (rather than being in the synthesis of new molecules).
The member of a family of plants characterized by root swellings in which nitrogen - fixing bacteria are housed; includes peas, soybeans, lupines, alfalfa, and clover.
A nutrient required by an organism in relatively large quantities.
A nutrient required by an organism in relatively small quantities.
Net Primary Production
The energy stored in the autotrophs of an ecosystem over a given time period.
The biogeochemical cycle by which nitrogen moves from its primary reservoir of nitrogen gas in the atmosphere via nitrogen - fixing bacteria to reservoirs in soil and water, through producers and into higher trophic levels, and then back to its reservoirs.
The process that combines atmospheric nitrogen wit hydrogen to form ammonium (NH+4).
A substance acquired from the environment and needed for the survival, growth, and development of an organism.
The pathways of a specific nutrient (such as carbon, nitrogen, phosphorous, or water) through the living and nonliving portions of an ecosystem; also called a biogeochemical cycle.
An organism that consumes both plants and animals.
The biogeochemical cycle by which phosphorous moves from its primary reservoir - phosphate - rich rock - to reservoirs of phosphate in soil and water, through producers and into higher trophic levels, and then back to its reservoirs.
Photosynthetic protists that are abundant in marine and freshwater environments.
An organism that feeds on producers; an herbivore.
A photosynthetic organism; an autotrophic.
The major source and storage site of a nutrient in an ecosystem, normally in the abiotic portion.
An organism that feeds on primary consumers; a carnivore.
A carnivore that feeds on other carnivores (secondary consumers).
The evaporation of water through the stomata, chiefly in leaves.
Literally, " feeding - level"; the categories of organisms in a community, and the position of an organism in a food chain, defined by the organism's source of energy; includes producers, primarily consumers, secondary consumers, and so on.
Nonphotosynthetic protists that are abundant in marine and freshwater environments.