What is a biotic index used for?

What is a biotic index used for?

A biotic index is a scale for showing the quality of an environment by indicating the types and abundances of organisms present in a representative sample of the environment. It is often used to assess the quality of water in marine and freshwater ecosystems.

What is biological pollution index?

The biological index of pollution (BIP) which hinges on the responses of aquatic biota to pollution of water sources was used to assess the quality of some water sources in Zaria area, Nigeria. Collections from the lakes was by means of dragging net over a 3 meter distance in the water.

What does biotic pollution mean?

Biological pollution (impacts or bio pollution) is the impact of humanity’s actions on the quality of aquatic and terrestrial environment. Specifically, biological pollution is the introduction of non-indigenous and invasive species.

What are the biological indicators of water pollution?

One of the predominantly known powerful plankton biological indicators is Cyanophyta that indicates rapid eutrophication of aquatic ecosystems via creation of bloom formations (Thakur et al., 2013). Phytoplankton had been used in successful observations of aquatic ecosystem pollution as useful biological indicator.

What is the biotic index currently used by the Environment Agency to detect organic loading called?

After the Saprobic system, the Trent biotic index was used in a number of countries (Haslam, 1991). This Index classifies the biological samples into key indicator groups, diversity of fauna and total number of groups (for example each species of Platyhelminthes or family of Chironomidae).

What is biotic analysis?

Biotic element analysis is an alternative to the areas-of-endemism approach for recognizing the presence or absence of vicariance events in a given region. If an ancestral biota was fragmented by vicariance events, biotic elements or clusters of distribution areas should emerge.

Are used as pollution indicators?

They include temperature, color, odor, aggregate stability, available water capacity, bulk density, infiltration rate, slaking, crusts, structure, and macro-pores. Only, the most distinct and reliable physical pollution indicators with the actual wide practice were designated.

What is an example of biotic pollution?

Leatherbacks are a biotic factor in their environment. Plastic waste found in an environment is considered pollution because animals may mistake the plastic for food, the plastic could take up space used for a habitat, and chemicals the plastic is treated with may be released into the environment.

What are examples of biotic factors?

Biotic factors are living or once-living organisms in the ecosystem. These are obtained from the biosphere and are capable of reproduction. Examples of biotic factors are animals, birds, plants, fungi, and other similar organisms.

How biological indicators can be used to monitor pollution levels?

Bioindicators can reveal indirect biotic effects of pollutants when many physical or chemical measurements cannot. Active methods are used to detect the presence of air pollutants by placing test plants of known response and genotype into the study area. The use of a biomonitor is described as biological monitoring.

What is an indicator species example?

indicator species, organism—often a microorganism or a plant—that serves as a measure of the environmental conditions that exist in a given locale. For example, greasewood indicates saline soil; mosses often indicate acid soil. Tubifex worms indicate oxygen-poor and stagnant water unfit to drink.

What are some examples of Bioindicators?

Microbial biomass, fungi, actinomycetes, lichens, as well as the population of earthworms, nematodes, termites, and ants can be used as bioindicators on account of their important role in nutrient cycling, specific soil fertility, soil development, and soil conservation (Anderson, 2003).

What is the Biotic Index of water quality?

For example, the Trent biotic index of water quality is derived from a mix of the presence or absence of certain indicator species and the number or diversity of taxa (or groups) or organisms present. One of the most well-researched indices is the Common Bird Index that was established in the UK by the British Trust…

How do you calculate the Hilsenhoff Biotic Index?

To calculate the Hilsenhoff Biotic Index number (HBI), multiple the tolerance values times the number of specimens (n x a). The sum the products (sigma, ∑). The total is divided by the total number of specimens in all groups (N). In this example: HBI = 43 ÷ 15 = 2.87

How do you calculate the Family Biotic Index?

Sum the resulting numbers, and then divide this sum by the total number of individuals. Equation 35.1 is used to calculate the Family Biotic Index (FBI) ( Hilsenhoff 1988 ): where ni and ti are the number of individuals and the tolerance, respectively, of the ith family and S = the number of families included in the analysis.

What are some examples of biotic and abiotic resources?

Examples of biotic resources include all the living components present in an ecosystem. These include producers, consumers, decomposers and detritivores. The term abiotic refers to all the non-living factors present in an ecosystem.

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