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Like a rolling stone: the mobility of maerl (Corallinaceae) and the neutrality of the associated assemblages

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dc.rights.license http://creativecommons.org/licenses/by-nc-nd/4.0 es_MX
dc.contributor.author Hinojosa Arango, Gustavo es_MX
dc.creator Hinojosa Arango, Gustavo es_MX
dc.date.accessioned 2021-07-01T04:42:11Z
dc.date.available 2021-07-01T04:42:11Z
dc.date.issued 2009-02
dc.identifier.uri http://literatura.ciidiroaxaca.ipn.mx:8080/xmlui/handle/LITER_CIIDIROAX/567
dc.description.abstract Beds of nonattached coralline algae (maerl or rhodoliths) are widespread and considered relatively species rich. This habitat is generally found in areas where there is chronic physical disturbance such that maerl thalli are frequently moved. Little is known, however, about how natural disturbance regimes affect the species associated with maerl. This study compared the richness, animal abundance, and algal biomass of maerl-associated species over a two-year period in a wave-disturbed bed and a sheltered maerl bed. Changes in associated species over time were assessed for departures from a neutral model in which the dissimilarity between samples re?ects random sampling from a common species pool. Algal biomass and species richness at the wave-exposed site and on stabilized maerl at the sheltered site were reduced at times of higher wind speeds. The changes in species richness were not distinguishable from a neutral model, implying that algal species were added at random to the assemblage as the level of disturbance lessened. Results for animal species were more mixed. Although mobile species were less abundant during windy periods at the exposed site, both neutral and non-neutral patterns were evident in the assemblages. Arti?cial stabilization of maerl had inconsistent effects on the richness of animals but always resulted in more attached algal species. While the results show that the response of a community to disturbance can be neutral, the domain of neutral changes in communities may be relatively small. Alongside nonneutral responses to natural disturbance, arti?cial stabilization always resulted in an assemblage that was more distinct than would be expected under random sampling from a common pool. Community responses to stabilization treatments did not consistently follow the predictions of the dynamic equilibrium model, the intermediate disturbance model, or a facilitation model. These inconsistencies may re?ect site-speci?c variation in both the disturbance regime and the adjacent habitats that provide source populations for many of the species found associated with maerl. es_MX
dc.language.iso eng es_MX
dc.publisher Ecology, 90 (2) es_MX
dc.rights info:eu-repo/semantics/openAccess es_MX
dc.subject info:eu-repo/classification/cti/2 es_MX
dc.subject.other Coralline algae es_MX
dc.subject.other disturbance es_MX
dc.subject.other maerl beds es_MX
dc.subject.other nestedness es_MX
dc.subject.other Phymatolithon calcareum es_MX
dc.subject.other rhodolith stability es_MX
dc.subject.other Strangford Lough es_MX
dc.subject.other Northern Ireland es_MX
dc.title Like a rolling stone: the mobility of maerl (Corallinaceae) and the neutrality of the associated assemblages es_MX
dc.type info:eu-repo/semantics/article es_MX
dc.creator.id HIAG770513HMNNRS05

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