Detritivore - Misplaced Pages

(Redirected from Deposit feeders) Animal that feeds on decomposing plant and animal parts as well as faeces

Earthworms are soil-dwelling detritivores.

Detritivores (also known as detrivores, detritophages, detritus feeders or detritus eaters) are heterotrophs that obtain nutrients by consuming detritus (decomposing plant and animal parts as well as feces). There are many kinds of invertebrates, vertebrates, and plants that carry out coprophagy. By doing so, all these detritivores contribute to decomposition and the nutrient cycles. Detritivores should be distinguished from other decomposers, such as many species of bacteria, fungi and protists, which are unable to ingest discrete lumps of matter. Instead, these other decomposers live by absorbing and metabolizing on a molecular scale (saprotrophic nutrition). The terms detritivore and decomposer are often used interchangeably, but they describe different organisms. Detritivores are usually arthropods and help in the process of remineralization. Detritivores perform the first stage of remineralization, by fragmenting the dead plant matter, allowing decomposers to perform the second stage of remineralization.

Plant tissues are made up of resilient molecules (e.g. cellulose, lignin, xylan) that decay at a much lower rate than other organic molecules. The activity of detritivores is the reason why we do not see an accumulation of plant litter in nature.

Detritivores are an important aspect of many ecosystems. They can live on any type of soil with an organic component, including marine ecosystems, where they are termed interchangeably with bottom feeders.

Typical detritivorous animals include millipedes, springtails, woodlice, dung flies, slugs, many terrestrial worms, sea stars, sea cucumbers, fiddler crabs, and some sedentary marine Polychaetes such as worms of the family Terebellidae.

Detritivores can be classified into more specific groups based on their size and biomes. Macrodetritivores are larger organisms such as millipedes, springtails, and woodlouse, while microdetritivores are smaller organisms such as bacteria.

Scavengers are not typically thought to be detritivores, as they generally eat large quantities of organic matter, but both detritivores and scavengers are the same type of cases of consumer-resource systems. The consumption of wood, whether alive or dead, is known as xylophagy. The activity of animals feeding only on dead wood is called sapro-xylophagy and those animals, sapro-xylophagous.

Ecology

Detritivores play an important role as recyclers in the ecosystem's energy flow and biogeochemical cycles. Alongside decomposers, they reintroduce vital elements such as carbon, nitrogen, phosphorus, calcium, and potassium back into the soil, allowing plants to take in these elements and use them for growth. They shred the dead plant matter which releases the trapped nutrients in the plant tissues. An abundance of detritivores in the soil allows the ecosystem to efficiently recycle nutrients.

Many detritivores live in mature woodland, though the term can be applied to certain bottom-feeders in wet environments. These organisms play a crucial role in benthic ecosystems, forming essential food chains and participating in the nitrogen cycle. Detritivores and decomposers that reside in the desert live in burrows underground to avoid the hot surface since underground conditions provide favorable living conditions for them. Detritivores are the main organisms in clearing plant litter and recycling nutrients in the desert. Due to the limited vegetation available in the desert, desert detritivores adapted and evolved ways to feed in the extreme conditions of the desert. Detritivore feeding behaviour is affected by rainfall; moist soil increases detritivore feeding and excretion.

Fungi, acting as decomposers, are important in today's terrestrial environment. During the Carboniferous period, fungi and bacteria had yet to evolve the capacity to digest lignin, and so large deposits of dead plant tissue accumulated during this period, later becoming the fossil fuels.

By feeding on sediments directly to extract the organic component, some detritivores incidentally concentrate toxic pollutants.

References

Wetzel RG (2001). Limnology: Lake and River Ecosystems (3rd. ed.). Academic Press. p. 700. ISBN 978-0-12-744760-5.
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Schmitz, Oswald J; Buchkowski, Robert W; Burghardt, Karin T; Donihue, Colin M. (2015-01-01), Pawar, Samraat; Woodward, Guy; Dell, Anthony I (eds.), "Chapter Ten – Functional Traits and Trait-Mediated Interactions: Connecting Community-Level Interactions with Ecosystem Functioning", Advances in Ecological Research, Trait-Based Ecology – From Structure to Function, vol. 52, Academic Press, pp. 319–343, doi:10.1016/bs.aecr.2015.01.003, archived from the original on 2021-05-30, retrieved 2021-02-20
De Smedt, Pallieter; Wasof, Safaa; Van de Weghe, Tom; Hermy, Martin; Bonte, Dries; Verheyen, Kris (2018-10-01). "Macro-detritivore identity and biomass along with moisture availability control forest leaf litter breakdown in a field experiment". Applied Soil Ecology. 131: 47–54. Bibcode:2018AppSE.131...47D. doi:10.1016/j.apsoil.2018.07.010. ISSN 0929-1393. S2CID 92379245.
Getz WM (February 2011). "Biomass transformation webs provide a unified approach to consumer-resource modelling". Ecology Letters. 14 (2): 113–24. Bibcode:2011EcolL..14..113G. doi:10.1111/j.1461-0248.2010.01566.x. PMC 3032891. PMID 21199247.
^ Lindsey-Robbins J, Vázquez-Ortega A, McCluney K, Pelini S (December 2019). "Effects of Detritivores on Nutrient Dynamics and Corn Biomass in Mesocosms". Insects. 10 (12): 453. doi:10.3390/insects10120453. PMC 6955738. PMID 31847249.
Tenore KR, et al. (SCOPE) (March 1988). "Nitrogen in benthic food chains." (PDF). In Blackbrun TH, Sorensen J (eds.). Nitrogen cycling in coastal marine environments. Vol. 21. pp. 191–206. Archived from the original (PDF) on 2007-06-10.
Biello D (28 June 2012). "White Rot Fungi Slowed Coal Formation". Scientific American. Archived from the original on 24 December 2020. Retrieved 9 August 2020.
Yang, H.; Chen, G.; Wang, J. (2024-02-02). "Microplastics in the Marine Environment: Sources, Fates, Impacts and Microbial Degradation - PMC". Toxics. 9 (2): 41. doi:10.3390/toxics9020041. PMC 7927104. PMID 33671786.

Feeding behaviours

Carnivores

adult	Avivore Egg predation Hematophagy Insectivore Lepidophagy Man-eating animal Molluscivore Mucophagy Myrmecophagy Ophiophagy Piscivore Spongivore Vermivore
reproductive	Oophagy Paedophagy Placentophagy Breastfeeding Weaning
cannibalistic	Human cannibalism Autocannibalism Sexual cannibalism

Herbivores

Cellular

Others

Methods

v t e Ecology: Modelling ecosystems: Trophic components
General	Abiotic component Abiotic stress Behaviour Biogeochemical cycle Biomass Biotic component Biotic stress Carrying capacity Competition Ecosystem Ecosystem ecology Ecosystem model Green world hypothesis Keystone species List of feeding behaviours Metabolic theory of ecology Productivity Resource Restoration
Producers	Autotrophs Chemosynthesis Chemotrophs Foundation species Kinetotrophs Mixotrophs Myco-heterotrophy Mycotroph Organotrophs Photoheterotrophs Photosynthesis Photosynthetic efficiency Phototrophs Primary nutritional groups Primary production
Consumers	Apex predator Bacterivore Carnivores Chemoorganotroph Foraging Generalist and specialist species Intraguild predation Herbivores Heterotroph Heterotrophic nutrition Insectivore Mesopredators Mesopredator release hypothesis Omnivores Optimal foraging theory Planktivore Predation Prey switching
Decomposers	Chemoorganoheterotrophy Decomposition Detritivores Detritus
Microorganisms	Archaea Bacteriophage Lithoautotroph Lithotrophy Marine Microbial cooperation Microbial ecology Microbial food web Microbial intelligence Microbial loop Microbial mat Microbial metabolism Phage ecology
Food webs	Biomagnification Ecological efficiency Ecological pyramid Energy flow Food chain Trophic level
Example webs	Lakes Rivers Soil Tritrophic interactions in plant defense Marine food webs cold seeps hydrothermal vents intertidal kelp forests North Pacific Gyre San Francisco Estuary tide pool
Processes	Ascendency Bioaccumulation Cascade effect Climax community Competitive exclusion principle Consumer–resource interactions Copiotrophs Dominance Ecological network Ecological succession Energy quality Energy systems language f-ratio Feed conversion ratio Feeding frenzy Mesotrophic soil Nutrient cycle Oligotroph Paradox of the plankton Trophic cascade Trophic mutualism Trophic state index
Defense, counter	Animal coloration Anti-predator adaptations Camouflage Deimatic behaviour Herbivore adaptations to plant defense Mimicry Plant defense against herbivory Predator avoidance in schooling fish

v t e Ecology: Modelling ecosystems: Other components
Population ecology	Abundance Allee effect Consumer-resource model Depensation Ecological yield Effective population size Intraspecific competition Logistic function Malthusian growth model Maximum sustainable yield Overpopulation Overexploitation Population cycle Population dynamics Population modeling Population size Predator–prey (Lotka–Volterra) equations Recruitment Small population size Stability Resilience Resistance Random generalized Lotka–Volterra model
Species	Biodiversity Density-dependent inhibition Ecological effects of biodiversity Ecological extinction Endemic species Flagship species Gradient analysis Indicator species Introduced species Invasive species / Native species Latitudinal gradients in species diversity Minimum viable population Neutral theory Occupancy–abundance relationship Population viability analysis Priority effect Rapoport's rule Relative abundance distribution Relative species abundance Species diversity Species homogeneity Species richness Species distribution Species–area curve Umbrella species
Species interaction	Antibiosis Biological interaction Commensalism Community ecology Ecological facilitation Interspecific competition Mutualism Parasitism Storage effect Symbiosis
Spatial ecology	Biogeography Cross-boundary subsidy Ecocline Ecotone Ecotype Disturbance Edge effects Foster's rule Habitat fragmentation Ideal free distribution Intermediate disturbance hypothesis Insular biogeography Land change modeling Landscape ecology Landscape epidemiology Landscape limnology Metapopulation Patch dynamics r/K selection theory Resource selection function Source–sink dynamics
Niche	Ecological niche Ecological trap Ecosystem engineer Environmental niche modelling Guild Habitat marine habitats Limiting similarity Niche apportionment models Niche construction Niche differentiation Ontogenetic niche shift
Other networks	Assembly rules Bateman's principle Bioluminescence Ecological collapse Ecological debt Ecological deficit Ecological energetics Ecological indicator Ecological threshold Ecosystem diversity Emergence Extinction debt Kleiber's law Liebig's law of the minimum Marginal value theorem Thorson's rule Xerosere
Other	Allometry Alternative stable state Balance of nature Biological data visualization Ecological economics Ecological footprint Ecological forecasting Ecological humanities Ecological stoichiometry Ecopath Ecosystem based fisheries Endolith Evolutionary ecology Functional ecology Industrial ecology Macroecology Microecosystem Natural environment Regime shift Sexecology Systems ecology Urban ecology Theoretical ecology
Outline of ecology

Categories:

Ecology

See also

References