Combined in situ experimentation and modelling approaches to disentangle processes involved in the earliest stage of community assembly. Fanfard, S., Charles, F., Coston-Guarini, J., Nozais, C., & Guarini, J. Community Ecology, 17(1):98--106, June, 2016. 00000 WOS:000388003500012doi abstract bibtex The ecological process of community assembly is described as the succession of three phases: colonization, regulation and segregation. Early colonization remains the least studied and quantified phase of assembly. In order to fill this gap, an approach combining in situ experiments and modelling was proposed to study colonization by a benthic macrofauna community in open microcosms containing a single, non-limiting resource. The experiment was three months long. A total of 51 taxa were observed in the microcosms, but data analyses of the species composition and abundances revealed that five species, Capitella spp., Gammaropsis maculata, Erichtionus punctatus, Nereiphylla paretti and Harmothoe mariannae, explained most of the observed variation in the assembly process. The population dynamics of these species were simulated taking into account functional traits that govern individual interactions. The dynamic model simulated a demographic stochasticity due to low population densities that result from the small size of the experimental microcosms. Using this combined approach of experiments and modelling, we showed that predation interactions alone can account for the abundances and species composition of primary consumers during the transient phase of early colonization.
@article{fanfard_combined_2016,
title = {Combined in situ experimentation and modelling approaches to disentangle processes involved in the earliest stage of community assembly},
volume = {17},
issn = {1585-8553},
doi = {10.1556/168.2016.17.1.12},
abstract = {The ecological process of community assembly is described as the succession of three phases: colonization, regulation and segregation. Early colonization remains the least studied and quantified phase of assembly. In order to fill this gap, an approach combining in situ experiments and modelling was proposed to study colonization by a benthic macrofauna community in open microcosms containing a single, non-limiting resource. The experiment was three months long. A total of 51 taxa were observed in the microcosms, but data analyses of the species composition and abundances revealed that five species, Capitella spp., Gammaropsis maculata, Erichtionus punctatus, Nereiphylla paretti and Harmothoe mariannae, explained most of the observed variation in the assembly process. The population dynamics of these species were simulated taking into account functional traits that govern individual interactions. The dynamic model simulated a demographic stochasticity due to low population densities that result from the small size of the experimental microcosms. Using this combined approach of experiments and modelling, we showed that predation interactions alone can account for the abundances and species composition of primary consumers during the transient phase of early colonization.},
language = {English},
number = {1},
journal = {Community Ecology},
author = {Fanfard, S. and Charles, F. and Coston-Guarini, J. and Nozais, C. and Guarini, J.-M.},
month = jun,
year = {2016},
note = {00000
WOS:000388003500012},
keywords = {Colonization, Community ecology, Experiment, Predation, Stochastic model, biodiversity, competition, complexity, dynamics, food webs, microcosm, predators, sediments, species-diversity},
pages = {98--106}
}
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