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Trophic level definition

Trophic level means a functional classification of taxa within a community that is based on feeding relationships, for example, aquatic green plants comprise the first trophic level and herbivores comprise the second.
Trophic level means a functional classification of taxa within a community that is based on feeding relationships. For example, aquatic green plants and herbivores comprise the first and second trophic levels in a food chain.
Trophic level or "TL" means the food web level in an ecosystem that is occupied by an organism or group of organisms because of what they eat and how they are related to the rest of the food web. For example, trophic level 3 in an aquatic ecosystem consists of small fish such as bluegills, crappies, and smelt and trophic level 4 consists of larger carnivorous fish such as walleye, northern pike, and most trout species.

Examples of Trophic level in a sentence

  • Trophic level four fish (largemouth bass) and trophic level 3 (sunfish) were targeted in the collection.

  • Trophic level transfer of microplastic: Mytilus edulis (L.) to Carcinus maenas (L.).

  • The baseline fish tissue concentrations as reported for Trophic level 4 fish in Wabigoon Lake as measured in the baseline study (DST 2014b for walleye) were used to assess the incremental tissue concentration for mercury.

  • Trophic level 3 (T3) and 4 (T4) fish were considered in this analysis.

  • Trophic level is an important term for assessing ecological efficiency for both wild- caught stocks and for cultured species.

  • A food chain looks like this: Role Food chain Trophic level Example Producer Green plant 1st trophic level PhytoplanktonPrim.

  • Trophic level, loss of energy, and ecological efficiency: Trophic level (TL) is an important term in ecology and can be defined as the position that an organism occupies in a food chain– what it eats, and what eats it.

  • Trophic level 3 fish are those that consume invertebrates and plankton.

  • Academic Press, New York.Pendleton R.C., Lloyd R.D., Mays C.W. & Church B.W. (1964) Trophic level effect on the accumulation of caesium-137 in cougars feeding on mule deer.

  • Trophic level: Stage in a food chain or web leading from primary producers (lowest trophic level) to primary and secondary consumers (highest level).


More Definitions of Trophic level

Trophic level means a functional classification of taxa within a community that is based on feeding relationships (e.g., aquatic plants comprise the first trophic level, herbivores com- prise the second, small fish comprise the third, predatory fish the fourth, etc.).
Trophic level means a functional classification of taxa within a community that is based on feeding relationships, for
Trophic level means an ecological term that describes the relative position of a species in the food chain,
Trophic level means the level or particular place in a food web and occupied by species with similar feeding behaviors. Trophic level 1 is occupied by primary producers (i.e., plants) while trophic level 4 represents carnivores or apex predators;
Trophic level means a functional classification of taxa within a community that is based on feeding relationships, for example, aquatic green plants com- prise the first trophic level and herbivores comprise the second.

Related to Trophic level

  • RBC level means an insurer's company action level RBC, regulatory action level RBC, authorized control level RBC, or mandatory control level RBC where:

  • Barrier Level means the Barrier Level as specified in § 1 of the Product and Underlying Data.

  • Base Level means the following amounts plus the percentage

  • Performance Level means a reference to one of Performance Level I, Performance Level II, Performance Level III, Performance Level IV or Performance Level V.

  • Mean Sea Level means the average height of the sea for all stages of the tide. It is used as a reference for establishing various elevations within the floodplain. For the purposes of this Ordinance, the term is synonymous with the National Geodetic Vertical Datum (NGVD) of 1929, the North American Vertical Datum (NAVD) of 1988, or other datum, to which Base Flood Elevations shown on a community's Flood Insurance Rate Map are referenced.

  • Use Level means the license use meter or model (which may include operating system, hardware system, application or machine tier limitations, if applicable) by which Symantec measures, prices and licenses the right to use the Licensed Software, in effect at the time an order is placed for such Licensed Software, as indicated in this License Agreement and the applicable License Instrument.

  • Elevated blood lead level (EBL) means an excessive absorption of lead that is a confirmed concentration of lead in whole blood of 20 µg/dl (micrograms of lead per deciliter of whole blood) for a single venous test or of 15-19 µg/dl in two consecutive tests taken three to four months apart.

  • Integration Level means the Social Security taxable wage base for the Plan Year, unless the Employer elects a lesser amount in (A) or (B) below.

  • Maximum contaminant level goal or “MCLG” means the maximum level of a contaminant in drinking water at which no known or anticipated adverse effect on the health of persons would occur, and which allows an adequate margin of safety. MCLGs are nonenforceable health goals.

  • Index Level means, in respect of any day and subject to Adjustment Provisions: (a) in respect of an Index (other than a Multiple Exchange Index), the closing level of such Index at the Valuation Time on such day; and (b) in respect of an Index that is a Multiple Exchange Index, the official closing level of the Index on such day at the Valuation Time as calculated and published by the Index Sponsor each as rounded up to four decimal places (with 0.00005 being rounded up), all as determined by the Calculation Agent.

  • Trigger Level means with respect to an Index, the level specified as such in Annex 1 with respect to such Index

  • Working level (WL) means any combination of short-lived radon daughters in 1 liter of air that will result in the ultimate emission of 1.3E+5 MeV of potential alpha particle energy. The short-lived radon daughters are—for radon-222: polonium-218, lead-214, bismuth-214, and polonium-214; and for radon-220: polonium-216, lead-212, bismuth-212, and polonium-212.

  • Minimum Level (ML means the concentration at which the entire analytical system must give a recognizable signal and an acceptable calibration point. The ML is the concentration in a sample that is equivalent to the concentration of the lowest calibration standard analyzed by a specific analytical procedure, assuming that all the method-specified sample weights, volumes and processing steps have been followed.

  • Share Level means the level of the Share as determined by the Determination Agent by reference to the level of the Share published by the Exchange.

  • Strike Level means the Strike Level as specified in § 1 of the Product and Underlying Data.

  • Final Trigger Level means 85.00%, being a percentage against which the performance of the Index will be measured in order to determine the Final Redemption Amount.

  • Digital Signal Level means one of several transmission rates in the time division multiplex hierarchy.

  • RTSR means the percentile rank of the Company’s Total Shareholder Return among the Total Shareholder Returns of all members of the Peer Group, ranked in descending order, at the end of the Performance Period.

  • Performance Measurement Period has the meaning set forth in Section 3.1(e)(ii).

  • Top Level Domain means the portion of the Domain Name to the right of the right-most period. (In the example, “COM”.) “Second Level Domain” means that portion of a domain name to the left of the right-most period, up to the second period from the right, if any, plus the Top Level Domain. (In the example, “XXXXXXXXX.XXX”.) “Third Level Domain” means that portion of a domain name to the left of the second period from the right, if any, up to the third period from the right, if any, plus the Second Level Domain. (In the example, “XXXXXXXXX.XXXXXXXXX.XXX”.).

  • Sound level meter means an instrument which includes a microphone, amplifier, RMS detector, integrator or time averager, output meter, and weighting networks used to measure sound pressure levels.

  • Digital Signal Level 3 (DS-3 means the 44.736 Mbps third level signal in the time division multiplex hierarchy.

  • Mid-level practitioner means a certified nurse-midwife engaging in the independent practice of midwifery under the independent practice of midwifery act, an advanced practice registered nurse issued a license pursuant to K.S.A. 65-1131, and amendments thereto, who has authority to prescribe drugs pursuant to a written protocol with a responsible physician under K.S.A. 65-1130, and amendments thereto, or a physician assistant licensed under the physician assistant licensure act who has authority to prescribe drugs pursuant to a written agreement with a supervising physician under K.S.A. 65-28a08, and amendments thereto.

  • Digital Signal Level 0 (DS-0 means the lowest-level signal in the time division multiplex digital hierarchy, and represents a voice-grade channel operating at either the 56 Kbps or 64 Kbps transmission bit rates. There are twenty-four (24) DS-0 channels in a DS-1.

  • Minimum Index Level means, in respect of a series of bull CBBCs, the lowest Spot Level of the Index during the MCE Valuation Period;

  • Digital Signal Level 0 or "DS0" means the 64 Kbps zero-level signal in the time-division multiplex hierarchy.