Benefits of aggregation in woodlice: a factor in the terrestrialization process?

Broly, Pierre; Deneubourg, Jean‐Louis; Devigne, Cédric

doi:10.1007/s00040-013-0313-7

Cited by 57 publications

(72 citation statements)

References 173 publications

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“…These benefits, such as a reduction of predator danger and ease of finding suitable shelter, could be similar to those proposed for terrestrial isopods (Broly et al. ), but the possibility remains that gregarious behavior serves a different set of adaptive functions in marine isopods compared to terrestrial isopods. Why individuals of C. harfordi seek the company of conspecifics is still unknown.…”

Section: Discussionsupporting

confidence: 57%

“…; Broly et al. ). It has been proposed that a primary reason that terrestrial isopods evolved gregarious and closely aggregative behavior was to reduce evaporative surface area and reduce desiccation (Allee ; Edney , ; Broly et al.…”

mentioning

confidence: 97%

“…More recently, however, it has been suggested that gregarious aggregation in terrestrial isopods brings other advantages such as reduction of danger from predators and making it easier for individuals to find a good place to shelter (Broly et al. ). Several studies on gregarious aggregative behavior of isopods have focused on the common terrestrial woodlouse, Porcellio scaber .…”

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confidence: 99%

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Gregarious aggregative behavior in the marine isopod Cirolana harfordi

Salma

Thomson

2016

Invertebrate Biology

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Gregarious huddling behavior where animals seek the close company of conspecifics is thought to have facilitated the evolutionary transition from sea to land in some species of isopods, the theory being that closely apposed bodies decrease surface area and reduce desiccation. In this study, specimens of the marine isopod Cirolana harfordi were investigated to determine whether they displayed gregarious aggregative behavior. Animals were placed in a 20‐cm‐diameter acrylic cylinder arena that contained two 5‐cm‐diameter circular acrylic shelters that were tinted red (to reduce light transmittance), one at either end of the arena. Specimens of C. harfordi chose one of the two identical shelters at random, and the majority of animals congregated under this winning shelter. When an arena with one shelter tinted red and one clear shelter was used, the majority of animals congregated under the red shelter. These data indicate that the aggregative behavior displayed by this marine isopod species is driven by gregarious, conspecific attraction as well as reactions to environmental heterogeneity and negative phototaxis. Gregarious behavior in this marine isopod may afford the species advantages other than avoiding desiccation.

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Section: Discussionsupporting

confidence: 57%

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confidence: 97%

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confidence: 99%

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Gregarious aggregative behavior in the marine isopod Cirolana harfordi

Salma

Thomson

2016

Invertebrate Biology

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“…Attraction through chemical cues may constitute an efficient way to promote aggregation in suitable habitats (Pawlik, 1992;Robinson, Larsen, & Kerr, 2011;Silva-Filho, Bailez, & Viana-Bailez, 2012), indirectly increasing the strength of densitydependent regulation mechanisms of founder populations. Positive density-dependent interactions include the mitigation of abiotic stress in crowding intertidal invertebrates (Jurgens & Gaylord, 2016;Minchinton, 1997), caterpillars (Klok & Chown, 1999), and plants (Vogt et al, 2014); enhanced reproduction, such as fruit dispersal in plants (Blendinger, Loiselle, & Blake, 2008) and fertilization in marine invertebrates (Kent, Hawkins, & Doncaster, 2003;Levitan, Sewell, & Chia, 1992) and terrestrial woodlice (Broly, Deneubourg, & Devigne, 2013); and diminishing of predation risk in invertebrates (Denno & Benrey, 1997;Turchin & Kareiva, 1989) and vertebrates (Blumstein & Daniel, 2003;Carrascal, Alonso, & Alonso, 1990). Negative interactions usually lie in some sort of intraspecific competition, which may reach unsustainable levels under conditions of very high-population density (Branch, 1975;Chisholm & Muller-Landau, 2011;Gerla & Mooij, 2014;Hart & Marshall, 2009;Robins & Reid, 1997).…”

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confidence: 99%

Persistence and space preemption explain species‐specific founder effects on the organization of marine sessile communities

Vieira

Flores

Dias

2018

Ecology and Evolution

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Community assembly may not follow predictable successional stages, with a large fraction of the species pool constituted by potential pioneering species and successful founders defined through lottery. In such systems, priority effects may be relevant in the determination of trajectories of developing communities and hence diversity and assemblage structure at later advanced states. In order to assess how different founder species may trigger variable community trajectories and structures, we conducted an experimental study using subtidal sessile assemblages as model. We manipulated the identity of functionally different founders and initial colony size (a proxy of the time lag before the arrival of later species), and followed trajectories. We did not observe any effects of colony size on response variables, suggesting that priority effects take place even when the time lag between the establishment of pioneering species and late colonizers is very short. Late community structure at experimental panels that started either with the colonial ascidian Botrylloides nigrum, or the arborescent bryozoan Bugula neritina, was similar to control panels allowed natural assembling. In spite of high potential for fast space domination, and hence negative priority effects, B. nigrum suffered high mortality and did not persist throughout succession. Bugula neritina provided complex physical microhabitats through conspecific clustering that have enhanced larval settlement of late species arrivals, but no apparent facilitation was observed. Differently, panels founded by the encrusting bryozoan Schizoporella errata led to different and less diverse communities compared to naturally assembled panels, evidencing strong negative priority effects through higher persistence and space preemption. Schizoporella errata founder colonies inhibited further conspecific settlement, which may greatly relax intraspecific competition, allowing resource allocation to colony growth and space domination, thus reducing the chances for the establishment of other species.

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“…In order to maintain a correct balance of their body fluids, they depend on effective behavioural patterns such as aggregation and avoidance of unsuitable habitats (Warburg, 1968;Broly et al, 2013). Isopods' tolerance to desiccation has been investigated and several degrees of susceptibility to dry conditions were already identified among this group (Warburg, 1968).…”

Section: Introductionmentioning

confidence: 99%

Toxicity interaction between chlorpyrifos, mancozeb and soil moisture to the terrestrial isopod Porcellionides pruinosus

et al. 2016

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A main source of uncertainty currently associated with environmental risk assessment of chemicals is the poor understanding of the influence of environmental factors on the toxicity of xenobiotics. Aiming to reduce this uncertainty, here we evaluate the joint-effects of two pesticides (chlorpyrifos and mancozeb) on the terrestrial isopod Porcellionides pruinosus under different soil moisture regimes. A full factorial design, including three treatments of each pesticide and an untreated control, were performed under different soil moisture regimes: 25%, 50%, and 75% WHC. Our results showed that soil moisture had no effects on isopods survival, at the levels assessed in this experiment, neither regarding single pesticides nor mixture treatments. Additivity was always the most parsimonious result when both pesticides were present. Oppositely, both feeding activity and biomass change showed a higher sensitivity to soil moisture, with isopods generally showing worse performance when exposed to pesticides and dry or moist conditions. Most of the significant differences between soil moisture regimes were found in single pesticide treatments, yet different responses to mixtures could still be distinguished depending on the soil moisture assessed. This study shows that while soil moisture has the potential to influence the effects of the pesticide mixture itself, such effects might become less important in a context of complex combinations of stressors, as the major contribution comes from its individual interaction with each pesticide. Finally, the implications of our results are discussed in light of the current state of environmental risk assessment procedures and some future perspectives are advanced.

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Benefits of aggregation in woodlice: a factor in the terrestrialization process?

Cited by 57 publications

References 173 publications

Gregarious aggregative behavior in the marine isopod Cirolana harfordi

Gregarious aggregative behavior in the marine isopod Cirolana harfordi

Persistence and space preemption explain species‐specific founder effects on the organization of marine sessile communities

Toxicity interaction between chlorpyrifos, mancozeb and soil moisture to the terrestrial isopod Porcellionides pruinosus

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