{{Short description|Succession driven by the abiotic components of an ecosystem}} {{Distinguish|Allotransplantation}} {{Use dmy dates|date=September 2024}} In ecology, '''allogenic succession''' is succession driven by the abiotic components of an ecosystem.<ref name="ORO" /> In contrast, autogenic succession is driven by the biotic components of the ecosystem.<ref name="ORO" /> An allogenic succession can be initiated in a number of ways which can include: *Volcanic eruptions *Meteor or comet strike *Flooding *Drought *Earthquakes *Non-anthropogenic climate change<ref>[http://www.physicalgeography.net/fundamentals/9i.html 9(i) Plant Succession<!-- Bot generated title -->]</ref>
Allogenic succession can happen on a time scale that is proportionate with the disturbance. For example, allogenic succession that is the result of non-anthropogenic climate change can happen over thousands of years.<ref name="biotic_community_4698"/>
== Example == The majority of Salt Marsh development comes from allogenic succession.<ref>{{Cite journal |last1=Dini-Andreote |first1=Francisco |last2=Silva |first2=Michele de Cássia Pereira e |last3=Triadó-Margarit |first3=Xavier |last4=Casamayor |first4=Emilio O. |last5=Elsas |first5=Jan Dirk van |last6=Salles |first6=Joana Falcão |date=October 2014 |title=Dynamics of bacterial community succession in a salt marsh chronosequence: evidences for temporal niche partitioning |journal=The ISME Journal |language=en |volume=8 |issue=10 |pages=1989–2001 |doi=10.1038/ismej.2014.54 |pmid=24739625|pmc=4184019 |bibcode=2014ISMEJ...8.1989D }}</ref> The constant exposure to water in the intertidal zone causes the soil of a salt marsh to change over time. This results in sedimentation and nutrient buildup that also slowly raises the level of the land. What started as a sandy soil with a slightly high pH level, eventually becomes a loamy soil with a more neutral pH level. During this period, the soil-salinity will also change by starting low and eventually rising to higher levels from continued seawater exposure.
Glacier forelands are another example of ecosystems that form from autogenic but also partly allogenic succession.<ref>{{Cite journal |last1=Wojcik |first1=Robin |last2=Eichel |first2=Jana |last3=Bradley |first3=James A. |last4=Benning |first4=Liane G. |date=1 July 2021 |title=How allogenic factors affect succession in glacier forefields |url=https://www.sciencedirect.com/science/article/pii/S0012825221001422 |journal=Earth-Science Reviews |language=en |volume=218 |article-number=103642 |doi=10.1016/j.earscirev.2021.103642 |bibcode=2021ESRv..21803642W |hdl=1874/412195 |s2cid=235543727 |issn=0012-8252|hdl-access=free }}</ref> The importance of this is estimated to be higher in earlier successional stages, regarding rock formations, slope angles and soil composition.
==See also==
* {{portal-inline|Ecology}}
==References== {{Reflist|refs= <ref name="ORO">{{cite encyclopedia|last=Martin|first=Elizabeth|author2=Hine, Robert|encyclopedia=A Dictionary of Biology|title=Succession|url=http://www.oxfordreference.com/views/ENTRY.html?subview=Main&entry=t6.e4274|access-date=12 January 2011|edition=6th|year=2008|publisher=Oxford University Press|isbn=978-0-19-920462-5|oclc=}}</ref> <ref name="biotic_community_4698">{{cite web|title=Ecological Succession in Biotic Community |date=30 November 2014 |url=http://www.biologydiscussion.com/biotic-community/ecological-succession-in-biotic-community/4698}}</ref> }}
{{DEFAULTSORT:Allogenic Succession}} Category:Ecological succession
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