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searchaux" style="display:none">Metric in ecology</div> <p>In <a href="/wiki/Ecology" title="Ecology">ecology</a> the <b>relative abundance distribution</b> (<b>RAD</b>) or <b><a href="/wiki/Species_abundance" class="mw-redirect" title="Species abundance">species abundance</a> distribution</b> species abundance distribution (SAD) describes the relationship between the number of species observed in a field study as a function of their observed <a href="/wiki/Abundance_(ecology)" title="Abundance (ecology)">abundance</a>. The SAD is one of ecology's oldest and most universal laws – every community shows a hollow curve or hyperbolic shape on a histogram with many rare species and just a few common species.<sup id="cite_ref-Brown_1-0" class="reference"><a href="#cite_note-Brown-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> When plotted as a histogram of number (or percent) of species on the y-axis vs. abundance on an arithmetic x-axis, the classic hyperbolic J-curve or hollow curve is produced, indicating a few very abundant species and many rare species.<sup id="cite_ref-McGill_al_2007_2-0" class="reference"><a href="#cite_note-McGill_al_2007-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The SAD is central prediction of the <a href="/wiki/Unified_neutral_theory_of_biodiversity" title="Unified neutral theory of biodiversity">Unified neutral theory of biodiversity</a>. </p><p>Starting in the 1970s and running unabated to the present day, mechanistic models (models attempting to explain the causes of the hollow curve SAD) and alternative interpretations and extensions of prior theories have proliferated to an extraordinary degree.<sup id="cite_ref-McGill_al_2007_2-1" class="reference"><a href="#cite_note-McGill_al_2007-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The graphs obtained in this manner are typically fitted to a <a href="/wiki/Zipf%E2%80%93Mandelbrot_law" title="Zipf–Mandelbrot law">Zipf–Mandelbrot law</a>, the exponent of which serves as an index of <a href="/wiki/Biodiversity" title="Biodiversity">biodiversity</a> in the ecosystem under study.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Notes_and_references">Notes and references</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Relative_abundance_distribution&action=edit&section=1" title="Edit section: Notes and references"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Brown-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Brown_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFBrown1995" class="citation book cs1">Brown, J.H. (1995). <i>Macroecology</i>. University of Chicago Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-226-07614-0" title="Special:BookSources/978-0-226-07614-0"><bdi>978-0-226-07614-0</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Macroecology&rft.pub=University+of+Chicago+Press&rft.date=1995&rft.isbn=978-0-226-07614-0&rft.aulast=Brown&rft.aufirst=J.H.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARelative+abundance+distribution" class="Z3988"></span></span> </li> <li id="cite_note-McGill_al_2007-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-McGill_al_2007_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-McGill_al_2007_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">McGill BJ, Etienne RS, Gray JS, Alonso D, Anderson MJ, Benecha HK, Dornelas M, Enquist BJ, Green JL, He F, Hurlbert AH. et al. 1999. <i>Species abundance distributions: moving beyond single prediction theories to integration within an ecological framework. </i>. Ecology Letters (2007): 10:995-1015.</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMouillotLepretre,_A2000" class="citation journal cs1">Mouillot, D; Lepretre, A (2000). <a rel="nofollow" class="external text" href="https://link.springer.com/article/10.1023%2FA%3A1006297211561">"Introduction of relative abundance distribution (RAD) indices, estimated from the rank-frequency diagrams (RFD), to assess changes in community diversity"</a>. <i>Environmental Monitoring and Assessment</i>. <b>63</b> (2). Springer: 279–295. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1023%2FA%3A1006297211561">10.1023/A:1006297211561</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:102285701">102285701</a><span class="reference-accessdate">. Retrieved <span class="nowrap">24 Dec</span> 2008</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Environmental+Monitoring+and+Assessment&rft.atitle=Introduction+of+relative+abundance+distribution+%28RAD%29+indices%2C+estimated+from+the+rank-frequency+diagrams+%28RFD%29%2C+to+assess+changes+in+community+diversity&rft.volume=63&rft.issue=2&rft.pages=279-295&rft.date=2000&rft_id=info%3Adoi%2F10.1023%2FA%3A1006297211561&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A102285701%23id-name%3DS2CID&rft.aulast=Mouillot&rft.aufirst=D&rft.au=Lepretre%2C+A&rft_id=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1023%252FA%253A1006297211561&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARelative+abundance+distribution" class="Z3988"></span></span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist 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abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Modelling_ecosystems" title="Template:Modelling ecosystems"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Modelling_ecosystems" title="Template talk:Modelling ecosystems"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Modelling_ecosystems" title="Special:EditPage/Template:Modelling ecosystems"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Ecology:_Modelling_ecosystems:_Trophic_components" style="font-size:114%;margin:0 4em"><a href="/wiki/Ecology" title="Ecology">Ecology</a>: <a href="/wiki/Ecosystem_model" title="Ecosystem model">Modelling ecosystems</a>: <a href="/wiki/Trophic_level" title="Trophic level">Trophic</a> components</div></th></tr><tr><th scope="row" class="navbox-group" style="width:7.5em">General</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abiotic_component" title="Abiotic component">Abiotic component</a></li> <li><a href="/wiki/Abiotic_stress" title="Abiotic stress">Abiotic stress</a></li> <li><a href="/wiki/Behavioral_ecology" title="Behavioral ecology">Behaviour</a></li> <li><a href="/wiki/Biogeochemical_cycle" title="Biogeochemical cycle">Biogeochemical cycle</a></li> <li><a href="/wiki/Biomass_(ecology)" title="Biomass (ecology)">Biomass</a></li> <li><a href="/wiki/Biotic_component" class="mw-redirect" title="Biotic component">Biotic component</a></li> <li><a href="/wiki/Biotic_stress" title="Biotic stress">Biotic stress</a></li> <li><a href="/wiki/Carrying_capacity" title="Carrying capacity">Carrying capacity</a></li> <li><a href="/wiki/Competition_(biology)" title="Competition (biology)">Competition</a></li> <li><a href="/wiki/Ecosystem" title="Ecosystem">Ecosystem</a></li> <li><a href="/wiki/Ecosystem_ecology" title="Ecosystem ecology">Ecosystem ecology</a></li> <li><a href="/wiki/Ecosystem_model" title="Ecosystem model">Ecosystem model</a></li> <li><a href="/wiki/Green_world_hypothesis" title="Green world hypothesis">Green world hypothesis</a></li> <li><a href="/wiki/Keystone_species" title="Keystone species">Keystone species</a></li> <li><a href="/wiki/List_of_feeding_behaviours" title="List of feeding behaviours">List of feeding behaviours</a></li> <li><a href="/wiki/Metabolic_theory_of_ecology" title="Metabolic theory of ecology">Metabolic theory of ecology</a></li> <li><a href="/wiki/Productivity_(ecology)" title="Productivity (ecology)">Productivity</a></li> <li><a href="/wiki/Resource_(biology)" title="Resource (biology)">Resource</a></li> <li><a href="/wiki/Restoration_ecology" class="mw-redirect" title="Restoration ecology">Restoration</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Autotroph" title="Autotroph">Producers</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Autotroph" title="Autotroph">Autotrophs</a></li> <li><a href="/wiki/Chemosynthesis" title="Chemosynthesis">Chemosynthesis</a></li> <li><a href="/wiki/Chemotroph" title="Chemotroph">Chemotrophs</a></li> <li><a href="/wiki/Foundation_species" title="Foundation species">Foundation species</a></li> <li><a href="/wiki/Kinetotroph" title="Kinetotroph">Kinetotrophs</a></li> <li><a href="/wiki/Mixotroph" title="Mixotroph">Mixotrophs</a></li> <li><a href="/wiki/Myco-heterotrophy" title="Myco-heterotrophy">Myco-heterotrophy</a></li> <li><a href="/wiki/Mycotroph" title="Mycotroph">Mycotroph</a></li> <li><a href="/wiki/Organotroph" title="Organotroph">Organotrophs</a></li> <li><a href="/wiki/Photoheterotroph" title="Photoheterotroph">Photoheterotrophs</a></li> <li><a href="/wiki/Photosynthesis" title="Photosynthesis">Photosynthesis</a></li> <li><a href="/wiki/Photosynthetic_efficiency" title="Photosynthetic efficiency">Photosynthetic efficiency</a></li> <li><a href="/wiki/Phototroph" title="Phototroph">Phototrophs</a></li> <li><a href="/wiki/Primary_nutritional_groups" title="Primary nutritional groups">Primary nutritional groups</a></li> <li><a href="/wiki/Primary_production" title="Primary production">Primary production</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Consumer_(food_chain)" title="Consumer (food chain)">Consumers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apex_predator" title="Apex predator">Apex predator</a></li> <li><a href="/wiki/Bacterivore" title="Bacterivore">Bacterivore</a></li> <li><a href="/wiki/Carnivore" title="Carnivore">Carnivores</a></li> <li><a href="/wiki/Chemoorganotroph" class="mw-redirect" title="Chemoorganotroph">Chemoorganotroph</a></li> <li><a href="/wiki/Foraging" title="Foraging">Foraging</a></li> <li><a href="/wiki/Generalist_and_specialist_species" title="Generalist and specialist species">Generalist and specialist species</a></li> <li><a href="/wiki/Intraguild_predation" title="Intraguild predation">Intraguild predation</a></li> <li><a href="/wiki/Herbivore" title="Herbivore">Herbivores</a></li> <li><a href="/wiki/Heterotroph" title="Heterotroph">Heterotroph</a></li> <li><a href="/wiki/Heterotrophic_nutrition" title="Heterotrophic nutrition">Heterotrophic nutrition</a></li> <li><a href="/wiki/Insectivore" title="Insectivore">Insectivore</a></li> <li><a href="/wiki/Mesopredator" title="Mesopredator">Mesopredators</a></li> <li><a href="/wiki/Mesopredator_release_hypothesis" title="Mesopredator release hypothesis">Mesopredator release hypothesis</a></li> <li><a href="/wiki/Omnivore" title="Omnivore">Omnivores</a></li> <li><a href="/wiki/Optimal_foraging_theory" title="Optimal foraging theory">Optimal foraging theory</a></li> <li><a href="/wiki/Planktivore" title="Planktivore">Planktivore</a></li> <li><a href="/wiki/Predation" title="Predation">Predation</a></li> <li><a href="/wiki/Prey_switching" title="Prey switching">Prey switching</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Decomposer" title="Decomposer">Decomposers</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chemoorganoheterotrophy" class="mw-redirect" title="Chemoorganoheterotrophy">Chemoorganoheterotrophy</a></li> <li><a href="/wiki/Decomposition" title="Decomposition">Decomposition</a></li> <li><a href="/wiki/Detritivore" title="Detritivore">Detritivores</a></li> <li><a href="/wiki/Detritus" title="Detritus">Detritus</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Microorganism#Habitats_and_ecology" title="Microorganism">Microorganisms</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Archaea" title="Archaea">Archaea</a></li> <li><a href="/wiki/Bacteriophage" title="Bacteriophage">Bacteriophage</a></li> <li><a href="/wiki/Lithoautotroph" title="Lithoautotroph">Lithoautotroph</a></li> <li><a href="/wiki/Lithotroph" title="Lithotroph">Lithotrophy</a></li> <li><a href="/wiki/Marine_microorganisms" title="Marine microorganisms">Marine</a></li> <li><a href="/wiki/Microbial_cooperation" title="Microbial cooperation">Microbial cooperation</a></li> <li><a href="/wiki/Microbial_ecology" title="Microbial ecology">Microbial ecology</a></li> <li><a href="/wiki/Microbial_food_web" title="Microbial food web">Microbial food web</a></li> <li><a href="/wiki/Microbial_intelligence" title="Microbial intelligence">Microbial intelligence</a></li> <li><a href="/wiki/Microbial_loop" title="Microbial loop">Microbial loop</a></li> <li><a href="/wiki/Microbial_mat" title="Microbial mat">Microbial mat</a></li> <li><a href="/wiki/Microbial_metabolism" title="Microbial metabolism">Microbial metabolism</a></li> <li><a href="/wiki/Phage_ecology" title="Phage ecology">Phage ecology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Food_web" title="Food web">Food webs</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Biomagnification" title="Biomagnification">Biomagnification</a></li> <li><a href="/wiki/Ecological_efficiency" title="Ecological efficiency">Ecological efficiency</a></li> <li><a href="/wiki/Ecological_pyramid" title="Ecological pyramid">Ecological pyramid</a></li> <li><a href="/wiki/Energy_flow_(ecology)" title="Energy flow (ecology)">Energy flow</a></li> <li><a href="/wiki/Food_chain" title="Food chain">Food chain</a></li> <li><a href="/wiki/Trophic_level" title="Trophic level">Trophic level</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em">Example webs</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lake_ecosystem#Trophic_relationships" title="Lake ecosystem">Lakes</a></li> <li><a href="/wiki/River_ecosystem#Trophic_relationships" title="River ecosystem">Rivers</a></li> <li><a href="/wiki/Soil_food_web" title="Soil food web">Soil</a></li> <li><a href="/wiki/Tritrophic_interactions_in_plant_defense" title="Tritrophic interactions in plant defense">Tritrophic interactions in plant defense</a></li> <li><a href="/wiki/Marine_food_web" title="Marine food web">Marine food webs</a> <ul><li><a href="/wiki/Cold_seep" title="Cold seep">cold seeps</a></li> <li><a href="/wiki/Hydrothermal_vent#Biological_communities" title="Hydrothermal vent">hydrothermal vents</a></li> <li><a href="/wiki/Intertidal_ecology" title="Intertidal ecology">intertidal</a></li> <li><a href="/wiki/Kelp_forest#Trophic_ecology" title="Kelp forest">kelp forests</a></li> <li><a href="/wiki/North_Pacific_Gyre" title="North Pacific Gyre">North Pacific Gyre</a></li> <li><a href="/wiki/Ecology_of_the_San_Francisco_Estuary#Food_web" title="Ecology of the San Francisco Estuary">San Francisco Estuary</a></li> <li><a href="/wiki/Tide_pool" title="Tide pool">tide pool</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em">Processes</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ascendency" title="Ascendency">Ascendency</a></li> <li><a href="/wiki/Bioaccumulation" title="Bioaccumulation">Bioaccumulation</a></li> <li><a href="/wiki/Cascade_effect_(ecology)" title="Cascade effect (ecology)">Cascade effect</a></li> <li><a href="/wiki/Climax_community" title="Climax community">Climax community</a></li> <li><a href="/wiki/Competitive_exclusion_principle" title="Competitive exclusion principle">Competitive exclusion principle</a></li> <li><a href="/wiki/Consumer%E2%80%93resource_interactions" title="Consumer–resource interactions">Consumer–resource interactions</a></li> <li><a href="/wiki/Copiotroph" title="Copiotroph">Copiotrophs</a></li> <li><a href="/wiki/Dominance_(ecology)" title="Dominance (ecology)">Dominance</a></li> <li><a href="/wiki/Ecological_network" title="Ecological network">Ecological network</a></li> <li><a href="/wiki/Ecological_succession" title="Ecological succession">Ecological succession</a></li> <li><a href="/wiki/Energy_quality" title="Energy quality">Energy quality</a></li> <li><a href="/wiki/Energy_systems_language" title="Energy systems language">Energy systems language</a></li> <li><a href="/wiki/F-ratio_(oceanography)" title="F-ratio (oceanography)">f-ratio</a></li> <li><a href="/wiki/Feed_conversion_ratio" title="Feed conversion ratio">Feed conversion ratio</a></li> <li><a href="/wiki/Feeding_frenzy" title="Feeding frenzy">Feeding frenzy</a></li> <li><a href="/wiki/Mesotrophic_soil" title="Mesotrophic soil">Mesotrophic soil</a></li> <li><a href="/wiki/Nutrient_cycle" title="Nutrient cycle">Nutrient cycle</a></li> <li><a href="/wiki/Oligotroph" title="Oligotroph">Oligotroph</a></li> <li><a href="/wiki/Paradox_of_the_plankton" title="Paradox of the plankton">Paradox of the plankton</a></li> <li><a href="/wiki/Trophic_cascade" title="Trophic cascade">Trophic cascade</a></li> <li><a href="/wiki/Trophic_mutualism" title="Trophic mutualism">Trophic mutualism</a></li> <li><a href="/wiki/Trophic_state_index" title="Trophic state index">Trophic state index</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em">Defense,<br />counter</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Animal_coloration" title="Animal coloration">Animal coloration</a></li> <li><a href="/wiki/Anti-predator_adaptation" title="Anti-predator adaptation">Anti-predator adaptations</a></li> <li><a href="/wiki/Camouflage" title="Camouflage">Camouflage</a></li> <li><a href="/wiki/Deimatic_behaviour" title="Deimatic behaviour">Deimatic behaviour</a></li> <li><a href="/wiki/Herbivore_adaptations_to_plant_defense" title="Herbivore adaptations to plant defense">Herbivore adaptations to plant defense</a></li> <li><a href="/wiki/Mimicry" title="Mimicry">Mimicry</a></li> <li><a href="/wiki/Plant_defense_against_herbivory" title="Plant defense against herbivory">Plant defense against herbivory</a></li> <li><a href="/wiki/Shoaling_and_schooling#Predator_avoidance" title="Shoaling and schooling">Predator avoidance in schooling fish</a></li></ul> </div></td></tr></tbody></table></div><div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Ecology:_Modelling_ecosystems:_Other_components" style="padding:3px"><table class="nowraplinks hlist mw-collapsible uncollapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Modelling_ecosystems" title="Template:Modelling ecosystems"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Modelling_ecosystems" 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href="/wiki/Consumer-resource_model" title="Consumer-resource model">Consumer-resource model</a></li> <li><a href="/wiki/Depensation" title="Depensation">Depensation</a></li> <li><a href="/wiki/Ecological_yield" title="Ecological yield">Ecological yield</a></li> <li><a href="/wiki/Effective_population_size" title="Effective population size">Effective population size</a></li> <li><a href="/wiki/Intraspecific_competition" title="Intraspecific competition">Intraspecific competition</a></li> <li><a href="/wiki/Logistic_function" title="Logistic function">Logistic function</a></li> <li><a href="/wiki/Malthusian_growth_model" title="Malthusian growth model">Malthusian growth model</a></li> <li><a href="/wiki/Maximum_sustainable_yield" title="Maximum sustainable yield">Maximum sustainable yield</a></li> <li><a href="/wiki/Overpopulation" title="Overpopulation">Overpopulation</a></li> <li><a href="/wiki/Overexploitation" title="Overexploitation">Overexploitation</a></li> <li><a href="/wiki/Population_cycle" title="Population cycle">Population cycle</a></li> <li><a href="/wiki/Population_dynamics" title="Population dynamics">Population dynamics</a></li> <li><a href="/wiki/Population_model" title="Population model">Population modeling</a></li> <li><a href="/wiki/Population_size" title="Population size">Population size</a></li> <li><a href="/wiki/Lotka%E2%80%93Volterra_equations" title="Lotka–Volterra equations">Predator–prey (Lotka–Volterra) equations</a></li> <li><a href="/wiki/Recruitment_(biology)" title="Recruitment (biology)">Recruitment</a></li> <li><a href="/wiki/Small_population_size" title="Small population size">Small population size</a></li> <li><a href="/wiki/Ecological_stability" title="Ecological stability">Stability</a> <ul><li><a href="/wiki/Ecological_resilience" title="Ecological resilience">Resilience</a></li> <li><a href="/wiki/Resistance_(ecology)" title="Resistance (ecology)">Resistance</a></li></ul></li> <li><a href="/wiki/Random_generalized_Lotka%E2%80%93Volterra_model" title="Random generalized Lotka–Volterra model">Random generalized Lotka–Volterra model</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em">Species</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Biodiversity" title="Biodiversity">Biodiversity</a></li> <li><a href="/wiki/Density_dependence" title="Density dependence">Density-dependent inhibition</a></li> <li><a href="/wiki/Ecological_effects_of_biodiversity" title="Ecological effects of biodiversity">Ecological effects of biodiversity</a></li> <li><a href="/wiki/Ecological_extinction" title="Ecological extinction">Ecological extinction</a></li> <li><a href="/wiki/Endemism" title="Endemism">Endemic species</a></li> <li><a href="/wiki/Flagship_species" title="Flagship species">Flagship species</a></li> <li><a href="/wiki/Ordination_(statistics)" title="Ordination (statistics)">Gradient analysis</a></li> <li><a href="/wiki/Bioindicator" title="Bioindicator">Indicator species</a></li> <li><a href="/wiki/Introduced_species" title="Introduced species">Introduced species</a></li> <li><a href="/wiki/Invasive_species" title="Invasive species">Invasive species</a> / <a href="/wiki/Native_species" title="Native species">Native species</a></li> <li><a href="/wiki/Latitudinal_gradients_in_species_diversity" title="Latitudinal gradients in species diversity">Latitudinal gradients in species diversity</a></li> <li><a href="/wiki/Minimum_viable_population" title="Minimum viable population">Minimum viable population</a></li> <li><a href="/wiki/Unified_neutral_theory_of_biodiversity" title="Unified neutral theory of biodiversity">Neutral theory</a></li> <li><a href="/wiki/Occupancy%E2%80%93abundance_relationship" title="Occupancy–abundance relationship">Occupancy–abundance relationship</a></li> <li><a href="/wiki/Population_viability_analysis" title="Population viability analysis">Population viability analysis</a></li> <li><a href="/wiki/Priority_effect" title="Priority effect">Priority effect</a></li> <li><a href="/wiki/Rapoport%27s_rule" title="Rapoport's rule">Rapoport's rule</a></li> <li><a class="mw-selflink selflink">Relative abundance distribution</a></li> <li><a href="/wiki/Relative_species_abundance" title="Relative species abundance">Relative species abundance</a></li> <li><a href="/wiki/Species_diversity" title="Species diversity">Species diversity</a></li> <li><a href="/wiki/Species_homogeneity" title="Species homogeneity">Species homogeneity</a></li> <li><a href="/wiki/Species_richness" title="Species richness">Species richness</a></li> <li><a href="/wiki/Species_distribution" title="Species distribution">Species distribution</a></li> <li><a href="/wiki/Species%E2%80%93area_relationship" title="Species–area relationship">Species–area curve</a></li> <li><a href="/wiki/Umbrella_species" title="Umbrella species">Umbrella species</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em">Species<br />interaction</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Antibiosis" title="Antibiosis">Antibiosis</a></li> <li><a href="/wiki/Biological_interaction" title="Biological interaction">Biological interaction</a></li> <li><a href="/wiki/Commensalism" title="Commensalism">Commensalism</a></li> <li><a href="/wiki/Community_(ecology)" title="Community (ecology)">Community ecology</a></li> <li><a href="/wiki/Ecological_facilitation" title="Ecological facilitation">Ecological facilitation</a></li> <li><a href="/wiki/Interspecific_competition" title="Interspecific competition">Interspecific competition</a></li> <li><a href="/wiki/Mutualism_(biology)" title="Mutualism (biology)">Mutualism</a></li> <li><a href="/wiki/Parasitism" title="Parasitism">Parasitism</a></li> <li><a href="/wiki/Storage_effect" title="Storage effect">Storage effect</a></li> <li><a href="/wiki/Symbiosis" title="Symbiosis">Symbiosis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Spatial_ecology" title="Spatial ecology">Spatial<br />ecology</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Biogeography" title="Biogeography">Biogeography</a></li> <li><a href="/wiki/Cross-boundary_subsidy" title="Cross-boundary subsidy">Cross-boundary subsidy</a></li> <li><a href="/wiki/Cline_(biology)" title="Cline (biology)">Ecocline</a></li> <li><a href="/wiki/Ecotone" title="Ecotone">Ecotone</a></li> <li><a href="/wiki/Ecotype" title="Ecotype">Ecotype</a></li> <li><a href="/wiki/Disturbance_(ecology)" title="Disturbance (ecology)">Disturbance</a></li> <li><a href="/wiki/Edge_effects" title="Edge effects">Edge effects</a></li> <li><a href="/wiki/Foster%27s_rule" title="Foster's rule">Foster's rule</a></li> <li><a href="/wiki/Habitat_fragmentation" title="Habitat fragmentation">Habitat fragmentation</a></li> <li><a href="/wiki/Ideal_free_distribution" title="Ideal free distribution">Ideal free distribution</a></li> <li><a href="/wiki/Intermediate_disturbance_hypothesis" title="Intermediate disturbance hypothesis">Intermediate disturbance hypothesis</a></li> <li><a href="/wiki/Insular_biogeography" title="Insular biogeography">Insular biogeography</a></li> <li><a href="/wiki/Land_change_modeling" title="Land change modeling">Land change modeling</a></li> <li><a href="/wiki/Landscape_ecology" title="Landscape ecology">Landscape ecology</a></li> <li><a href="/wiki/Landscape_epidemiology" title="Landscape epidemiology">Landscape epidemiology</a></li> <li><a href="/wiki/Landscape_limnology" title="Landscape limnology">Landscape limnology</a></li> <li><a href="/wiki/Metapopulation" title="Metapopulation">Metapopulation</a></li> <li><a href="/wiki/Patch_dynamics" title="Patch dynamics">Patch dynamics</a></li> <li><a href="/wiki/R/K_selection_theory" title="R/K selection theory"><i>r</i>/<i>K</i> selection theory</a></li> <li><a href="/wiki/Resource_selection_function" title="Resource selection function">Resource selection function</a></li> <li><a href="/wiki/Source%E2%80%93sink_dynamics" title="Source–sink dynamics">Source–sink dynamics</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Ecological_niche" title="Ecological niche">Niche</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ecological_niche" title="Ecological niche">Ecological niche</a></li> <li><a href="/wiki/Ecological_trap" title="Ecological trap">Ecological trap</a></li> <li><a href="/wiki/Ecosystem_engineer" title="Ecosystem engineer">Ecosystem engineer</a></li> <li><a href="/wiki/Species_distribution_modelling" title="Species distribution modelling">Environmental niche modelling</a></li> <li><a href="/wiki/Guild_(ecology)" title="Guild (ecology)">Guild</a></li> <li><a href="/wiki/Habitat" title="Habitat">Habitat</a> <ul><li><a href="/wiki/Marine_habitat" title="Marine habitat">marine habitats</a></li></ul></li> <li><a href="/wiki/Limiting_similarity" title="Limiting similarity">Limiting similarity</a></li> <li><a href="/wiki/Niche_apportionment_models" title="Niche apportionment models">Niche apportionment models</a></li> <li><a href="/wiki/Niche_construction" title="Niche construction">Niche construction</a></li> <li><a href="/wiki/Niche_differentiation" class="mw-redirect" title="Niche differentiation">Niche differentiation</a></li> <li><a href="/wiki/Ontogenetic_niche_shift" title="Ontogenetic niche shift">Ontogenetic niche shift</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em"><a href="/wiki/Non-trophic_networks" title="Non-trophic networks">Other<br />networks</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Assembly_rules" title="Assembly rules">Assembly rules</a></li> <li><a href="/wiki/Bateman%27s_principle" title="Bateman's principle">Bateman's principle</a></li> <li><a href="/wiki/Bioluminescence" title="Bioluminescence">Bioluminescence</a></li> <li><a href="/wiki/Ecological_collapse" class="mw-redirect" title="Ecological collapse">Ecological collapse</a></li> <li><a href="/wiki/Ecological_debt" title="Ecological debt">Ecological debt</a></li> <li><a href="/wiki/Ecological_debt" title="Ecological debt">Ecological deficit</a></li> <li><a href="/wiki/Energy_flow_(ecology)" title="Energy flow (ecology)">Ecological energetics</a></li> <li><a href="/wiki/Ecological_indicator" title="Ecological indicator">Ecological indicator</a></li> <li><a href="/wiki/Ecological_threshold" title="Ecological threshold">Ecological threshold</a></li> <li><a href="/wiki/Ecosystem_diversity" title="Ecosystem diversity">Ecosystem diversity</a></li> <li><a href="/wiki/Emergence" title="Emergence">Emergence</a></li> <li><a href="/wiki/Extinction_debt" title="Extinction debt">Extinction debt</a></li> <li><a href="/wiki/Kleiber%27s_law" title="Kleiber's law">Kleiber's law</a></li> <li><a href="/wiki/Liebig%27s_law_of_the_minimum" title="Liebig's law of the minimum">Liebig's law of the minimum</a></li> <li><a href="/wiki/Marginal_value_theorem" title="Marginal value theorem">Marginal value theorem</a></li> <li><a href="/wiki/Thorson%27s_rule" title="Thorson's rule">Thorson's rule</a></li> <li><a href="/wiki/Xerosere" title="Xerosere">Xerosere</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:7.5em">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Allometry" title="Allometry">Allometry</a></li> <li><a href="/wiki/Alternative_stable_state" title="Alternative stable state">Alternative stable state</a></li> <li><a href="/wiki/Balance_of_nature" title="Balance of nature">Balance of nature</a></li> <li><a href="/wiki/Biological_data_visualization" title="Biological data visualization">Biological data visualization</a></li> <li><a href="/wiki/Ecological_economics" title="Ecological economics">Ecological economics</a></li> <li><a href="/wiki/Ecological_footprint" title="Ecological footprint">Ecological footprint</a></li> <li><a href="/wiki/Ecological_forecasting" title="Ecological forecasting">Ecological forecasting</a></li> <li><a href="/wiki/Environmental_humanities" title="Environmental humanities">Ecological humanities</a></li> <li><a href="/wiki/Ecological_stoichiometry" title="Ecological stoichiometry">Ecological stoichiometry</a></li> <li><a href="/wiki/Ecopath" title="Ecopath">Ecopath</a></li> <li><a href="/wiki/Ecosystem_based_fisheries" class="mw-redirect" title="Ecosystem based fisheries">Ecosystem based fisheries</a></li> <li><a href="/wiki/Endolith" title="Endolith">Endolith</a></li> <li><a href="/wiki/Evolutionary_ecology" title="Evolutionary ecology">Evolutionary ecology</a></li> <li><a href="/wiki/Functional_ecology" title="Functional ecology">Functional ecology</a></li> <li><a href="/wiki/Industrial_ecology" title="Industrial ecology">Industrial ecology</a></li> <li><a href="/wiki/Macroecology" title="Macroecology">Macroecology</a></li> <li><a href="/wiki/Microecosystem" title="Microecosystem">Microecosystem</a></li> <li><a href="/wiki/Natural_environment" title="Natural environment">Natural environment</a></li> <li><a href="/wiki/Regime_shift" title="Regime shift">Regime shift</a></li> <li><a href="/wiki/Sexecology" title="Sexecology">Sexecology</a></li> <li><a href="/wiki/Systems_ecology" title="Systems ecology">Systems ecology</a></li> <li><a href="/wiki/Urban_ecology" 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