Decline of a non-native ecosystem engineer and its replacement with a native on rocky shores: effects on the diversity and structure of benthic communities

Pacheco, Aldo S.

doi:10.1007/s12526-019-01033-y

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…Although the results of species numbers and individual abundances revealed differences in the single statistical analysis in sites with and without human intervention, the multivariate analysis, null models and UNTB analysis revealed that the differences in both groups of sites are not significant. The weak differences between sites with different kinds of human intervention among the studied sites probably is due to the presence of Pyura praeputialis (Heller, 1878) which is a kind of key species that regulates the species composition on rocky shores in northern Chile (Guiller, 1959;Pacheco & Castilla, 2000;Castilla et al, 2004;Pacheco & Andrade, 2020). In this context, in the present study the altered human sites do not have P. praeputialis, and in non-altered sites, this species was scarce, due its decrease in the last two decades (Castilla et al, 2014;Pacheco & Andrade, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…The weak differences between sites with different kinds of human intervention among the studied sites probably is due to the presence of Pyura praeputialis (Heller, 1878) which is a kind of key species that regulates the species composition on rocky shores in northern Chile (Guiller, 1959;Pacheco & Castilla, 2000;Castilla et al, 2004;Pacheco & Andrade, 2020). In this context, in the present study the altered human sites do not have P. praeputialis, and in non-altered sites, this species was scarce, due its decrease in the last two decades (Castilla et al, 2014;Pacheco & Andrade, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…In this scenario, the weak differences between sites located within the town and the sites located outside the town would be explained due to ENSO processes, that generate a marked decrease in species diversity and abundances in the studied sites. This decrease can be enhanced in sites with human intervention, because they have no ecosystem engineers species such as Perumytilus purpuratus and Pyura chilensis (Molina, 1782) that provide sustenance for high species richness and individual abundances (Pacheco & Andrade, 2020).…”

Section: Discussionmentioning

confidence: 99%

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Null and neutral models for explaining spatial variations in intertidal invertebrate species diversity on rocky shores in Antofagasta town (23°S, Chile)

et al. 2023

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The intertidal invertebrate community on rocky shores in northern Chile is characterised by a high species richness resulting from the high productivity of this ecosystem. The present study aims to do the first characterisation of invertebrate communities on rocky shores in Antofagasta town and surroundings (23°S), using species co-occurrence and niche-sharing null models, analysis of similarities (ANOSIM) and nonmetric multidimensional scaling (NMDS). The null model results revealed that species associations are not structured, that the existing species do not have the same ecology, which would result in many repeated species by site, and that specificity in their ecological niches exists. The ANOSIM and NMDS revealed the absence of significant differences between sites with human intervention and without human intervention. The obtained results agree with the literature for northern and central Chilean and southern Peruvian rocky shores, and other coastal marine ecosystems with high productivity.

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