Macropredators as shapers of invaded fouling communities in a cold temperate port

Giachetti, Clara Belen; Battini, Nicolás; Bortolus, Alejandro; Tatián, Marcos; Schwindt, Evangelina

doi:10.1016/j.jembe.2019.151177

Cited by 21 publications

(21 citation statements)

References 46 publications

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“…In the marine environment, the few studies approaching this subject show an increasing importance of predation controlling diversity and exotic species (Freestone, Ruiz, & Torchin, 2013;Kremer & Rocha, 2016) towards low latitudes, as predicted by the BIH. However, in some cases, intense predation structuring sessile communities and controlling exotic species is also observed in temperate areas (Cheng et al, 2019;Giachetti, Battin, Bortolus, Tatian, & Schwindt, 2019;Simkanin, Dower, Filip, Jamieson, & Therriault, 2013), when considering benthic predators instead of fishes. Biotic Interaction Hypothesis predictions are only valid for a specific functional group of organisms also in other cases (Lavender et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Calcareous defence structures of prey mediate the effects of predation and biotic resistance towards the tropics

Dias

Vieira

Pestana

et al. 2020

Diversity and Distributions

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Section: Introductionmentioning

confidence: 99%

Calcareous defence structures of prey mediate the effects of predation and biotic resistance towards the tropics

Dias

Vieira

Pestana

et al. 2020

Diversity and Distributions

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“…Exclusion experiments in such habitats are fortunately flourishing and provide important insights into spatial and temporal variations in consumer effects upon fouling development (e.g. Dumont et al 2011b;Giachetti et al 2019;Lavender et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Experimental and survey-based evidences for effective biotic resistance by predators in ports

2019

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Of the suite of species interactions involved in biotic resistance to species invasions, predation can have complex outcomes according to the theoretical and empirical framework of community ecology. In this study, we aimed to determine the likelihood of consumptive biotic resistance within fouling communities in four ports of central Chile. Notably, we examined the influence of micro-(> 1-2 mm, <1-2 cm) and macro-(> 1-2 cm) predators, with a particular focus on their effects on non-indigenous species (NIS). Experimental and observational approaches were combined. An exclusion experiment was carried out over four months to examine predator effect on the early establishment of new assemblages on settlement panels. Later successional stages upon panels were examined over a total of twenty-six months and supported by rapid assessment surveys in the surrounding habitats. Community structure was significantly influenced by the exclusion treatments. Macropredators reduced the fouling biomass and abundance, although conflicting patterns emerged from the exclusion of both categories of predators. Altogether, predators reduced the abundance of most NIS and cryptogenic species, some of them being only observed when the two categories of predators were excluded-a pattern generally sustained over the long-term dynamics in community development. Our results show an effective consumptive biotic resistance, furthermore possibly dependent on predator size. Further work is however needed to determine the influence of the functional diversity of natural enemies on the efficiency of biotic resistance and its interplay with other biotic interactions (competition or mutualism). A comprehensive understanding of these process should in turn help defining management strategies in a context of habitat modification and species loss.

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“…This pattern supposedly results from impact on species' evolution of higher environmental stress level closer to the poles (Schemske et al, ). Unexpectedly, predation is increasingly found important at high latitudes (Giachetti, Battini, Bortolus, Tatián, & Schwindt, and references therein). Highest intensity of predation is generally linked to low abiotic stress, and so are associational defenses from predators backed by strong facilitators such as FS (Bruno et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…This can cause local increase both in predation intensity and associational defenses by FS compared with the levels predicted solely from latitude. Consistently, many examples of strong trophic control in subpolar and polar waters come from subtidal habitats (Estes & Palmisano, 1974;Giachetti et al, 2019;Quijón & Snelgrove, 2005), although inter-and subtidal predation levels have been never specifically compared across latitudes.…”

Section: Discussionmentioning

confidence: 99%

Epibenthic predators control mobile macrofauna associated with a foundation species in a subarctic subtidal community

Yakovis

Artemieva

2019

Ecology and Evolution

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Foundation species (FS) are strong facilitators providing habitat for numerous dependent organisms. The communities shaped by FS are commonly structured by interplay of facilitation and consumer control. Predators or grazers often indirectly determine community structure eliminating either FS or their principal competitors. Alternatively, they can prey on the dependent taxa directly, which is generally buffered by FS via forming complex habitats with numerous refuges. The latter case has been never investigated at high latitudes, where consumer control is widely considered weak. We manipulated the presence of common epibenthic crustacean predators to assess their effect on mobile macrofauna of the clusters developed by a FS (barnacle Balanus crenatus and its empty tests) in the White Sea shallow subtidal (65° N). While predation pressure on the FS itself here is low, the direct effects of a spider crab Hyas araneus and a shrimp Spirontocaris phippsii on the associated assemblages were unexpectedly strong. Removing the predators did not change species diversity, but tripled total abundance and altered multivariate community structure specifically increasing the numbers of amphipods, isopods (only affected by shrimp), and bivalves. Consumer control in the communities shaped by FS may not strictly follow the latitudinal predation gradient rule.

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Macropredators as shapers of invaded fouling communities in a cold temperate port

Cited by 21 publications

References 46 publications

Calcareous defence structures of prey mediate the effects of predation and biotic resistance towards the tropics

Calcareous defence structures of prey mediate the effects of predation and biotic resistance towards the tropics

Experimental and survey-based evidences for effective biotic resistance by predators in ports

Epibenthic predators control mobile macrofauna associated with a foundation species in a subarctic subtidal community

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