Editing Ecosystem engineer

{{Short description|Ecological niche}}
{{Use dmy dates|date=July 2016}}
[[Image:Beaver.jpg|thumb|[[Beavers]] are the prototypical ecosystem engineer because of the effects their [[beaver dam|dams]] have on [[Channel (geography)|channel]] flow, [[geomorphology]], and ecology.]]
[[Image:Rockfish around kelp Monterey Bay Aquarium.jpg|thumb|upright|[[Kelp]] are autogenic ecosystem engineers, by building the necessary structure for kelp forests.]]

An '''ecosystem engineer''' is any [[species]] that creates, significantly modifies, maintains or destroys a [[habitat]]. These organisms can have a large impact on [[species richness]] and landscape-level [[heterogeneity]] of an area.<ref name=Wright>{{cite journal | last1 = Wright | first1 = Justin P | last2 = Jones | first2 = Clive G | last3 = Flecker | first3 = Alexander S | year = 2002 | title = An ecosystem engineer, the beaver, increases species richness at the landscape scale | journal = Ecosystems Ecology | volume = 132 | issue = 1| pages = 96–101 | doi=10.1007/s00442-002-0929-1| pmid = 28547281 | bibcode = 2002Oecol.132...96W | s2cid = 5940275 }}</ref> As a result, ecosystem engineers are important for maintaining the health and stability of the environment they are living in. Since all organisms impact the environment they live in one way or another, it has been proposed that the term "ecosystem engineers" be used only for [[keystone species]] whose behavior very strongly affects other organisms.<ref name= Haemig>{{cite web |last=Haemig |first=PD |year=2012 |title=Ecosystem Engineers: wildlife that create, modify and maintain habitats |website=ecology.info |url=http://www.ecology.info/ecosystem-engineers.htm |archive-url=https://web.archive.org/web/20210506182829/http://www.ecology.info/ecosystem-engineers.htm |archive-date=6 May 2021 }}</ref>

==Types==
Jones et al.<ref>{{cite journal | last1 = Jones | first1 = CG | last2 = Lawton | first2 = JH | last3 = Shachak | first3 = M | year = 1994 | title = Organisms as ecosystem engineers | journal = Oikos | volume = 69 | issue = 3| pages = 373–386 | doi=10.2307/3545850| jstor = 3545850 | bibcode = 1994Oikos..69..373J }}</ref> identified two different types of ecosystem engineers:

===Allogenic engineers===

Allogenic engineers modify the [[biophysical environment]] by mechanically changing living or nonliving materials from one form to another. [[Beaver]]s are the original model for ecosystem engineers; in the process of [[clearcutting]] and damming, beavers alter their [[ecosystem]] extensively. The addition of a dam will change both the distribution and the abundance of many organisms in the area.<ref name= Haemig /> [[Caterpillars]] are another example in that by creating shelters from leaves, they are also creating shelters for other organisms which may occupy them either simultaneously or subsequently.<ref>{{cite journal | last1 = Jones | first1 = CG | last2 = Lawton | first2 = JH | last3 = Shachak | first3 = M | year = 1997 | title = Positive and negative effects of organisms as physical ecosystem engineers | journal = Ecology | volume = 78 | issue = 7| pages = 1946–1957 | doi=10.2307/2265935| jstor = 2265935 }}</ref> An additional example may be that of [[woodpecker]]s or other birds who create holes in trees for them to nest in. Once these birds are through with them, the holes are used by other species of birds or mammals for housing.<ref name= Haemig />

===Autogenic engineers===

Autogenic engineers modify the environment by modifying themselves. Trees are an example of this; as they grow, their trunks and branches create habitats for other living things, which may include squirrels, birds or insects. In the tropics, [[liana]]s connect trees, which allow many animals to travel exclusively through the forest canopy.<ref>{{cite web |url=http://www.eoearth.org/article/Ecosystem_engineer |title=Ecosystem engineer}}</ref>{{better source needed|date=June 2021}}

==Importance==
Being able to identify ecosystem engineers in an environment can be important when looking at the influence these individuals may have over other organisms living in the same environment – especially in terms of resource availability.<ref name= Chapman>{{cite journal | last1 = Chapman | first1 = Colin A | display-authors = etal  | year = 2013 | title = Are primates ecosystem engineers? | doi = 10.1007/s10764-012-9645-9 | journal = International Journal of Primatology | volume = 34 | pages = 1–14 | s2cid = 3343186 }}</ref> It's also vital to recognize that ecosystem engineers are not organisms that directly provide others with living or dead tissue. In other words, they are identified as engineers because of their ability to modify resources, not because of their trophic effect.<ref name=":04">{{Cite journal|last1=Jones|first1=Clive G.|last2=Lawton|first2=John H.|last3=Shachak|first3=Moshe|date=1994|title=Organisms as Ecosystem Engineers|url=https://www.jstor.org/stable/3545850|journal=Oikos|volume=69|issue=3|pages=373–386|doi=10.2307/3545850|jstor=3545850 |bibcode=1994Oikos..69..373J |issn=0030-1299|url-access=subscription}}</ref> While the impact of ecosystem engineers can be as great as keystone species, they differ in their types of impact. Keystone species are typically essential because of their trophic effect, while ecosystem engineers are not.

As with keystone species, ecosystem engineers are not necessarily abundant. Species with greater density and large per capita effect have a more easily-noticeable effect, but less abundant species can still have a large impact. A prime example is the mud shrimp ''[[Filhollianassa filholi]]'', an ecosystem engineer with a small population density that nevertheless affects the temporal and spatial growth of macrofauna with its burrow structures.<ref>{{Cite journal|last1=Berkenbusch|first1=K.|last2=Rowden|first2=A.A.|date=2003|title=Ecosystem engineering — moving away from 'just-so' stories|url=https://www.jstor.org/stable/24058163|journal=New Zealand Journal of Ecology|volume=27|issue=1|pages=67–73|jstor=24058163 |issn=0110-6465}}</ref>

The presence of some ecosystem engineers has been linked to higher species richness at the [[landscape]] level. By modifying the habitat, organisms like the beaver create more habitat heterogeneity and so can support species not found elsewhere.<ref name= Wright /> Thoughts may be that similar to other [[umbrella species]] by conserving an ecosystem engineer you may be able to protect the overall diversity of a landscape.<ref name= Wright /> Beavers have also been shown to maintain habitats in such a way as to protect the rare [[Saint Francis' satyr]] butterfly and increase plant diversity.<ref name= Bartel>{{cite journal | last1 = Bartel | first1 = Rebecca A | last2 = Haddad | first2 = Nick M | last3 = Wright | first3 = Justin P | year = 2010 | title = Ecosystem engineers maintain a rare species of butterfly and increase plant diversity | journal = Oikos | volume = 119 | issue = 5| pages = 883–890 | doi=10.1111/j.1600-0706.2009.18080.x| bibcode = 2010Oikos.119..883B }}</ref>

[[Biodiversity]] may also be affected by ecosystem engineer's ability to increase the complexity of processes within an ecosystem, potentially allowing greater [[species richness]] and diversity in the local environments. As an example, beavers have the capacity to modify riparian forest and expand wetland habitats, which results in an increase of the diversity of the habitats by allowing a greater number of species to inhabit the landscape. [[Coral reef|Coral-reef habitats]], created by the ecosystem engineer coral species, hold some of the highest abundances of aquatic species in the world.<ref>{{Cite journal|title = Biodiversity effects of ecosystem engineers are stronger on more complex ecosystem processes|journal = Ecology|date = 1 September 2013|issn = 1939-9170|pages = 1977–1985|volume = 94|issue = 9|doi = 10.1890/12-1385.1|language = en|first1 = Adriano|last1 = Caliman|first2 = Luciana S.|last2 = Carneiro|first3 = João J. F.|last3 = Leal|first4 = Vinicius F.|last4 = Farjalla|first5 = Reinaldo L.|last5 = Bozelli|first6 = Francisco A.|last6 = Esteves|pmid = 24279269| bibcode=2013Ecol...94.1977C }}</ref>

== Controversy ==
There is controversy around the usage of the term "ecosystem engineer" to classify a species, as it can be perceived as a "buzzword" to the ecological science community. The use of the term "ecosystem engineering" might suggest that the species was intentionally and consciously modifying its environment.<ref>{{Cite journal|last=Power|first=Mary E.|date=1997-07-01|title=Ecosystem engineering by organisms: why semantics matters Reply from M. Power|url=https://www.sciencedirect.com/science/article/pii/S0169534797810208|journal=Trends in Ecology & Evolution|language=en|volume=12|issue=7|pages=275–276|doi=10.1016/S0169-5347(97)81020-8|pmid=21238069 |bibcode=1997TEcoE..12..275P |issn=0169-5347|url-access=subscription}}</ref> Another argument postulates that the ubiquity of ecosystem engineers translates to all species being ecosystem engineers.<ref>{{Cite journal|last1=Reichman|first1=O. J|last2=Seabloom|first2=Eric W|date=2002-07-01|title=Ecosystem engineering: a trivialized concept?: Response from Reichman and Seabloom|url=https://www.sciencedirect.com/science/article/pii/S0169534702025120|journal=Trends in Ecology & Evolution|language=en|volume=17|issue=7|pages=308|doi=10.1016/S0169-5347(02)02512-0|bibcode=2002TEcoE..17..308R |issn=0169-5347|url-access=subscription}}</ref> This would invite more ecological research to be done to delve into the classification of an ecosystem engineer.<ref name=":04"/> The generality and the specifications of identifying an ecosystem engineer has been the root of the controversy, and now more research is being conducted to definitively classify and categorize species based on their impact as an ecosystem engineer.<ref name=":04"/>

== Classification ==
Ecosystem engineers do have their general types, allogenic and autogenic, but further research has suggested that all organisms can fall under specific cases.<ref name=":04"/> It was proposed that there were six specific cases.<ref name=":04"/> These cases were differentiated by the species' ability to transform their resources to different states, as well as their ability to combat abiotic forces. A state refers to the physical condition of a material and a change in state refers to a physical abiotic or biotic material change<ref name=":04"/>

{| class="wikitable"
|+Cases of Ecosystem Engineers<ref name=":04"/>
!Case #
!Autogenic or Allogenic
!Rationale
!Example
|-
|1
|Autogenic
|Not considered ecosystem engineering
|Any species that are not considered ecosystem engineers.
|-
|2
|Allogenic
|Transform resources into usable and/or more beneficial forms
|Cows, after eating grass, produce cow pats with their dung and are used by other invertebrates as a food source and a shelter.
|-
|3
|Autogenic
|Organism transforms itself from one state to another and affects distribution and/or availability of resources and/or the traits of the physical environment.
|Coral and forests grow, which induce developmental change in the environment surrounding them
|-
|4
|Allogenic
|Able to transform one material from one state to another
|Beavers can take live trees and turn them into dead trees, then utilize those dead trees to build dams that are shelter for other animals and stabilize water flow in arid areas.
|-
|5
|Autogenic
|Modulate extreme abiotic forces, which then controls resource flow
|Crustose [[coralline algae]] break waves and protect coral reefs from immense amounts of water force.
|-
|6
|Allogenic
|Species falls under one or more of these cases
|[[Geukensia demissa|Ribbed mussels]] secrete [[Byssus|byssal threads]] that bind together to protect sediment and prevent erosion.
|}

==Introduced species as ecosystem engineers==
Species are able to be transported across all parts of the world by humans or human-made vessels at boundless rates resulting in foreign ecosystem engineers changing the dynamics of species interactions and the possibility for engineering to occur in locations that would not have been accessible by engineers without the mediation by humans.

[[Introduced species]], which may be [[invasive species]], are often ecosystem engineers. [[Kudzu]], a leguminous plant introduced to the southeast U.S., changes the distribution and number of animal and bird species in the areas it invades. It also crowds out native plant species. The [[zebra mussel]] is an ecosystem engineer in North America. By providing refuge from [[predator]]s, it encourages the growth of freshwater [[invertebrate]]s through increasing microhabitats. Light penetration into infected lakes also improves the ecosystem, resulting in an increase in [[algae]]. In contrast to the benefits some ecosystem engineers can cause, invasive species often have the reverse effect.

[[File:Gordon Dam.jpg|thumb|upright|The [[Gordon Dam]] in [[Tasmania]]]]

==Humans as ecosystem engineers==
Humans are thought to be the most dramatic ecosystem engineers. [[Niche construction]] has been prevalent since the earliest days of human activity.<ref>{{Cite journal|last=Smith|first=Bruce D.|date=30 March 2007|title=The Ultimate Ecosystem Engineers|journal=Science|language=en|volume=315|issue=5820|pages=1797–1798|doi=10.1126/science.1137740|issn=0036-8075|pmid=17395815|s2cid=21409034}}</ref> Through urban development, agricultural practices, logging, damming and mining, humans have changed the way they interact with the environment. 
This interaction is more studied in the field of [[human ecology]]. Considered both as an allogenic and autogenic engineers, humans do not necessarily fit into either category of ecosystem engineers.<ref name=":04"/> Humans are able to mimic autogenic effects as well as implement their own allogenic effects.<ref name=":04" /> Air-conditioning is one prime example of the way humans mimic autogenic effects<ref name=":04" />

Due to the complexity of many communities and ecosystems, restoration projects are often difficult. Ecosystem engineers have been proposed as a means to restore a given area to its previous state. While ideally these would all be natural agents, with today's level of development some form of human intervention may be necessary as well. In addition to being able to assist in [[restoration ecology]], ecosystem engineers may be a helpful agent in [[invasive species]] management.<ref name= Byers>{{cite journal | last1 = Byers | first1 = James E | display-authors = etal  | year = 2006 | title = Using ecosystem engineers to restore ecological systems | journal = Ecology and Evolution | volume = 21 | issue = 9| pages = 493–500 | doi=10.1016/j.tree.2006.06.002| pmid = 16806576 | bibcode = 2006TEcoE..21..493B }}</ref> New fields are developing which focus on restoring those ecosystems which have been disrupted or destroyed by human activities as well as developing ecosystems that are sustainable with both human and ecological values.<ref name= Mitsch>{{cite journal | last1 = Mitsch | first1 = William J | year = 2012 | title = What is ecological engineering? | journal = Ecological Engineering | volume = 45 | pages = 5–12 | doi=10.1016/j.ecoleng.2012.04.013| bibcode = 2012EcEng..45....5M | s2cid = 145370880 }}</ref>

==Examples==

===Terrestrial environments===
[[File:Beaver dam on Smilga.JPG|thumb|left|Beaver dam on [[Smilga (river)|Smilga River]] in [[Lithuania]]]]
Besides the previously mentioned beaver acting as an ecosystem engineer, other terrestrial animals do the same. This may be through feeding habits, migration patterns or other behaviors that result in more permanent changes.

Research has suggested primates as ecosystem engineers as a result of their feeding strategies – [[frugivory]] and [[folivory]] – making them act as seed dispersers.<ref name= Chapman /> As a whole primates are very abundant and feed on a large quantity of fruit that is then distributed around their territory. Elephants have also been designated ecosystem engineers as they cause very large changes to their environment whether it be through feeding, digging or migratory behavior.<ref name= Hayes>{{cite journal | url=https://doi.org/10.1016/j.geomorph.2011.04.045 | doi=10.1016/j.geomorph.2011.04.045 | title=Elephants (And extinct relatives) as earth-movers and ecosystem engineers | date=2012 | last1=Haynes | first1=Gary | journal=Geomorphology | volume=157-158 | pages=99–107 | bibcode=2012Geomo.157...99H | url-access=subscription }}</ref>

[[Prairie dogs]] are another terrestrial form of allogenic ecosystem engineers due to the fact that the species has the ability to perform substantial modifications by burrowing and [[Bioturbation|turning soil]]. They are able to influence soils and vegetation of the landscape while providing underground corridors for [[arthropods]], [[avians]], other small [[mammals]], and [[reptiles]]. This has a positive effect on species richness and diversity of their habitats which results in the prairie dogs being labelled as keystone species.<ref>{{Cite journal|last1=Baker|first1=Bruce W.|last2=Augustine|first2=David J.|last3=Sedgwick|first3=James A.|last4=Lubow|first4=Bruce C.|date=1 February 2013|title=Ecosystem engineering varies spatially: a test of the vegetation modification paradigm for prairie dogs|journal=Ecography|language=en|volume=36|issue=2|pages=230–239|doi=10.1111/j.1600-0587.2012.07614.x|bibcode=2013Ecogr..36..230B |issn=1600-0587}}</ref>

Arthropods can also be ecosystem engineers, such as [[spider]]s, ants, and many types of [[larva]]e that create shelters out of leaves, as well as [[gall-inducing insect]]s that change the shapes of plants.<ref>{{cite journal |title=Shelter-Building Insects and Their Role as Ecosystem Engineers |journal=Neotropical Entomology |date=2015-12-02 |last1=Cornelissen |first1=T |last2=Cintra |first2=F |last3=Santos |first3=J C |volume=45 |issue=1 |pages=1–12 |doi=10.1007/s13744-015-0348-8 |pmid=26631227 |s2cid=17978664 |url=https://link.springer.com/article/10.1007/s13744-015-0348-8 |accessdate=2021-06-15 |url-access=subscription }}</ref> [[Bark beetle|Bark beetles]] are an ecosystem engineer of forest ecosystems and can affect fire spread and severity when attacking their host pine species.<ref>{{Cite journal |last1=Harvey |first1=Brian J. |last2=Donato |first2=Daniel C. |last3=Romme |first3=William H. |last4=Turner |first4=Monica G. |date=2014 |title=Fire severity and tree regeneration following bark beetle outbreaks: the role of outbreak stage and burning conditions |url=https://pubmed.ncbi.nlm.nih.gov/29210226 |journal=Ecological Applications |volume=24 |issue=7 |pages=1608–1625 |doi=10.1890/13-1851.1 |issn=1051-0761 |pmid=29210226|bibcode=2014EcoAp..24.1608H }}</ref>

Not only animals are ecosystem engineers. Fungi are able to connect regions that are distant from one another and translocate nutrients between them.<ref>{{cite journal|last1=Boddy|first1=Lynne|last2=Watkinson|first2=Sarah C.|title=Wood decomposition, higher fungi, and their role in nutrient redistribution|journal=Canadian Journal of Botany|date=31 December 1995|volume=73|issue=S1|pages=1377–1383|doi=10.1139/b95-400}}</ref> Doing so they create nutritional niches for xylophagous invertebrates,<ref>{{cite journal|last1=Filipiak|first1=Michał|last2=Sobczyk|first2=Łukasz|last3=Weiner|first3=January|title=Fungal Transformation of Tree Stumps into a Suitable Resource for Xylophagous Beetles via Changes in Elemental Ratios|journal=Insects|date=9 April 2016|volume=7|issue=2|pages=13|doi=10.3390/insects7020013|pmc=4931425|doi-access=free}}</ref><ref>{{cite journal|last1=Filipiak|first1=Michał|last2=Weiner|first2=January|last3=Wilson|first3=Richard A.|title=How to Make a Beetle Out of Wood: Multi-Elemental Stoichiometry of Wood Decay, Xylophagy and Fungivory|journal=PLOS ONE|date=23 December 2014|volume=9|issue=12|pages=e115104|doi=10.1371/journal.pone.0115104|pmid=25536334|pmc=4275229|bibcode=2014PLoSO...9k5104F|doi-access=free}}</ref> supply trees with nitrogen translocated from previously predated animals<ref>{{cite journal|last1=Wardle|first1=D. A.|title=Ecological Linkages Between Aboveground and Belowground Biota|journal=Science|date=11 June 2004|volume=304|issue=5677|pages=1629–1633|doi=10.1126/science.1094875|pmid=15192218|bibcode=2004Sci...304.1629W|s2cid=36949807}}</ref> or even form an "underground pipeline" that redistributes carbon between trees.<ref>{{cite journal|last1=Klein|first1=T.|last2=Siegwolf|first2=R. T. W.|last3=Korner|first3=C.|title=Belowground carbon trade among tall trees in a temperate forest|journal=Science|date=14 April 2016|volume=352|issue=6283|pages=342–344|doi=10.1126/science.aad6188|pmid=27081070|bibcode=2016Sci...352..342K|s2cid=33458007}}</ref> Thus fungi are engineers controlling [[nutrient cycle]]s in ecosystems.
 
===Marine environments===
[[File:Eilat Scuba Parrotfish.JPG|thumb|Parrotfish]]
In marine environments, [[filter feeders]] and [[plankton]] are ecosystem engineers because they alter turbidity and light penetration, controlling the depth at which [[photosynthesis]] can occur.<ref>{{cite journal | last1 = Berke | first1 = Sarah K | year = 2012 | title = Functional Groups of Ecosystem Engineers: A Proposed Classification with Comments on Current Issues | doi = 10.1093/icb/icq077 | pmid = 21558195 | journal = Integrative and Comparative Biology | volume = 50 | issue = 2| pages = 147–157 | doi-access = free }}</ref> This in turn limits the primary productivity of [[benthic zone|benthic]] and [[pelagic zone|pelagic]] habitats<ref>{{cite journal | last1 = Abrahams | first1 = MV | last2 = Kattenfeld | first2 = MG | year = 1997 | title = The role of turbidity as a constraint on predator–prey interactions in aquatic environments | journal = Behavioral Ecology and Sociobiology | volume = 40 | issue = 3| pages = 169–74 | doi=10.1007/s002650050330| bibcode = 1997BEcoS..40..169A | s2cid = 24748783 }}</ref> and influences consumption patterns between [[trophic level|trophic]] groups.<ref>{{cite journal | last1 = Hartman | first1 = EJ | last2 = Abrahams | first2 = MV | year = 2000 | title = Sensory compensation and the detection of predators: the interaction between chemical and visual information | journal = Proceedings of the Royal Society B: Biological Sciences | volume = 267 | issue = 1443| pages = 571–75 | doi=10.1098/rspb.2000.1039| pmid = 10787160 | pmc = 1690576 }}</ref>

Another example of ecosystem engineers in marine environments would be [[scleractinian corals]] as they create the framework for the habitat most coral-reef organisms depend on.<ref name=Wild>{{cite journal | last1 = Wild | first1 = Christian | display-authors = etal  | year = 2011 | title = Climate change impedes scleractinian corals as primary reef ecosystem engineers | doi = 10.1071/mf10254 | journal = Marine and Freshwater Research | volume = 62 | issue = 2| pages = 205–215 | doi-access = free | bibcode = 2011MFRes..62..205W }}</ref> Some ecosystem engineers such as coral have help maintaining their environment. [[Parrotfish]] often help maintain coral reefs as they feed on macroalgae that competes with the coral.<ref name= Bozec>{{cite journal | last1 = Bozec | first1 = Yves-Marie | display-authors = etal  | year = 2013 | title = Reciprocal facilitation and non-linearity maintain habitat engineering on coral reefs | journal = Oikos | volume = 122 | issue = 3| pages = 428–440 | doi=10.1111/j.1600-0706.2012.20576.x| bibcode = 2013Oikos.122..428B | citeseerx = 10.1.1.457.9673 }}</ref> As this relationship is mutually beneficial, a positive feedback cycle is formed between the two organisms, making them both responsible for creating and maintaining coral reef ecosystems.<ref name= Bozec />

[[Whale|Whales]] are also being increasingly recognised for their role as ecosystem engineers despite the loss of up to 90% of their numbers during the [[History of whaling|commercial whaling era]].<ref>{{Cite journal |last1=Roman |first1=Joe |last2=Estes |first2=James A |last3=Morissette |first3=Lyne |last4=Smith |first4=Craig |last5=Costa |first5=Daniel |last6=McCarthy |first6=James |last7=Nation |first7=Jb |last8=Nicol |first8=Stephen |last9=Pershing |first9=Andrew |last10=Smetacek |first10=Victor |date=September 2014 |title=Whales as marine ecosystem engineers |url=http://doi.wiley.com/10.1890/130220 |journal=Frontiers in Ecology and the Environment |language=en |volume=12 |issue=7 |pages=377–385 |doi=10.1890/130220 |bibcode=2014FrEE...12..377R |issn=1540-9295}}</ref> Whales defecate at the surface and release nutrients that boost the growth of phytoplankton. As whales migrate across the oceans, and move up and down the water column, they help to spread these nutrients in a process that is known as the "[[Whale feces|Whale Pump]]".

==See also==
* [[Niche construction]]
* [[Structures built by animals]]
* [[Nest-building in primates]]
{{Clear}}

==References==
{{Reflist}}

=== Bibliography ===
* {{cite journal | last1 = Buse | first1 = J | last2 = Ranius | first2 = T | last3 = Assmann | first3 = T | year = 2008 | title = An endangered longhorn beetle associated with old oaks and its possible role as an ecosystem engineer | journal = Conservation Biology | volume = 22 | issue = 2| pages = 329–337 | doi=10.1111/j.1523-1739.2007.00880.x| pmid = 18261146 | s2cid = 24150325 }}
* {{cite journal | last1 = Crawford | first1 = KM | last2 = Crutsinger | first2 = GM | last3 = Sander | first3 = NJ | year = 2007 | title = Host-plant genotypic diversity mediates the distribution of an ecosystem engineer | url = http://trace.tennessee.edu/cgi/viewcontent.cgi?article=1949&context=utk_chanhonoproj | journal = Ecology | volume = 88 | issue = 8| pages = 2114–2120 | doi=10.1890/06-1441.1| pmid = 17824442 | bibcode = 2007Ecol...88.2114C | s2cid = 27037737 | url-access = subscription }}
* {{cite journal | last1 = Commito | first1 = J. A. | last2 = Celano | first2 = E. A. | last3 = Celico | first3 = H. J. | last4 = Como | first4 = S. | last5 = Johnson | first5 = C. P. | year = 2005 | title = Mussels matter: postlarval dispersal dynamics altered by a spatially complex ecosystem engineer | journal = Journal of Experimental Marine Biology and Ecology | volume = 316 | issue = 2| pages = 133–147 | doi=10.1016/j.jembe.2004.10.010| bibcode = 2005JEMBE.316..133C }}
* {{cite journal | last1 = Wright | first1 = JP | last2 = Jones | first2 = CG | year = 2006 | title =  The concept of organisms as ecosystem engineers ten years on: progress, limitations, and challenges | url = https://www.researchgate.net/publication/202001805 | journal = BioScience | volume = 56 | issue = 3| pages = 203–209 | doi=10.1641/0006-3568(2006)056[0203:tcooae]2.0.co;2| doi-access = free }}

==External links==
* [https://www.youtube.com/watch?v=zS2EBvtnMdA A lecture] by [[Moshe Shachak]], the developer of the concept of ecosystem engineers (together with CG. Jones and JH. Lawton) during the 90's.

{{modelling ecosystems|expanded=other}}

[[Category:Ecology terminology]]
[[Category:Ecological niche]]
[[Category:Habitat]]
[[Category:Invasive species]]
[[Category:Landscape ecology]]
[[Category:Systems ecology]]