Food Chain Multiplier Calculator

Conditional product of independently verified ordered step-specific trophic transfer factors, not regression-derived TMF, lipid-normalized BMF, actual foodweb exposure or guaranteed magnification.

Description

Sequential trophic transfer factors describe an adopted chain of successive steps.

Sequential trophic transfer factors describe an adopted chain of successive steps.^[1]

Their product is a conditional chain multiplier rather than a fitted food-web magnification slope.

When to use Food Chain Multiplier Calculator

Use this tool to calculate or review the supplied observations under the stated rules. Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.

How to use Food Chain Multiplier Calculator and understand its results

Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
Enter callerIndependentlyVerifiedSequentialTrophicTransferFactors, using the field meanings and rules below, then run the tool.
Read result.conditionalSequentialFoodChainMultiplier. Use the units and subtraction order below to interpret each value; retain negative differences where returned.
Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.

Input field	Meaning	Value type	Requirement
callerIndependentlyVerifiedSequentialTrophicTransferFactors	Caller independently verified sequential trophic transfer factors	list of number	Required

Supply a nonempty finite nonnegative transfer-factor list and multiply its entries. A zero factor makes the product zero; a nonfinite product fails. The list represents the caller-established transfer convention rather than a modeled food web.

conditionalTransferProduct=Π(transferFactor_i)

Use the matching field units and the exact boundary, ordering and reference rules above.

Output field	Meaning	Value type
result	Qualified observed calculation or explicit reference	object
result.conditionalSequentialFoodChainMultiplier	Product of the supplied sequential transfer factors.	number

json

{
  "input": {
    "callerIndependentlyVerifiedSequentialTrophicTransferFactors": [
      2,
      3
    ]
  },
  "output": {
    "result": {
      "conditionalSequentialFoodChainMultiplier": 6
    }
  }
}

Limitations and assumptions

Chemical identity, route, assay, exposure basis and reference applicability are caller-established. The output supplies no causal conclusion, universal toxicity threshold or authoritative regulatory determination.

Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries, subject to the narrower lengths and code rules above. Extremely large composite outputs are rejected.

Alternative or Complementary methods

For a related step, use Bioaccumulation Factor Calculator: A bioaccumulation factor compares biota and environmental concentrations on a declared compatible basis. For a complementary comparison, use Avian LD50 Calculator: An avian LD50 concerns an administered-dose lethal endpoint in a specified bird assay.

References

Food Chain Multiplier Calculator — tool.io

Similar or alternative tools

Bioaccumulation Factor Calculator
A bioaccumulation factor compares biota and environmental concentrations on a declared compatible basis.
Avian LD50 Calculator
An avian LD50 concerns an administered-dose lethal endpoint in a specified bird assay.