The structure of gammarid amphipod (Crustacea, Peracarida) assemblages associated with Sargassum (Phaeophyta, Fucales) and their link with the structural complexity of algae

Carvalho, Nayara Salgado; Grande, Henrique; Filho, José Souto Rosa; Jacobucci, Giuliano Buzá

doi:10.1007/s10750-018-3661-5

Cited by 31 publications

(14 citation statements)

References 55 publications

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“…Algal morphology mediates the vulnerability of associated fauna to predation (Zamzow et al, 2010;Ware et al, 2019). Also, structural and spatial traits of macroalgae affects the availability of space for the epifauna (Hacker & Steneck, 1990;Carvalho et al, 2018). The colonization of artificial substrates mimicking natural plants by epifaunal species highlights the importance of the physical structure of macrophytes for the settlement of associated fauna (Virnstein & Curran, 1986;Norderhaug, Christie & Rinde, 2002;Waage-Nielsen, Christie & Rinde, 2003).…”

Section: Discussionmentioning

confidence: 99%

Colonization of novel algal habitats by juveniles of a marine tube-dwelling amphipod

Bueno

Machado

Leite

2020

PeerJ

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Background Dispersal is an important process affecting population dynamics and connectivity. For marine direct developers, both adults and juveniles may disperse. Although the distribution of juveniles can be initially constrained by their mothers’ choice, they may be able to leave the parental habitat and colonize other habitats. We investigated the effect of habitat quality, patch size and presence of conspecific adults on the colonization of novel habitats by juveniles of the tube-dwelling amphipod Cymadusa filosa associated with the macroalgal host Sargassum filipendula. Methods We tested the factors listed above on the colonization of juveniles by manipulating natural and artificial plants in both the field and laboratory. Results In the laboratory, juveniles selected high-quality habitats (i.e., natural alga), where both food and shelter are provided, when low-quality resources (i.e., artificial alga) were also available. In contrast, habitat quality and algal patch size did not affect the colonization by juveniles in the field. Finally, the presence of conspecific adults did not affect the colonization of juveniles under laboratory condition but had a weak effect in the field experiment. Our results suggest that C. filosa juveniles can select and colonize novel habitats, and that such process can be partially affected by habitat quality, but not by patch size. Also, the presence of conspecifics may affect the colonization by juveniles. Successful colonization by this specific developmental stage under different scenarios indicates that juveniles may act as a dispersal agent in this species.

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Section: Discussionmentioning

confidence: 99%

Colonization of novel algal habitats by juveniles of a marine tube-dwelling amphipod

Bueno

Machado

Leite

2020

PeerJ

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“…populations from each site were morphologically different from each other (Longo, personal observation), possibly indicating different species, which could be influencing the variations on gastropod parameters. Distinct species identities, and thus distinct morphologies among Sargassum species, have already been related to differences in community parameters of amphipods (Carvalho et al ., 2018) and molluscs (Veiga et al ., 2018). Even though the algal structure parameter in this study (algal dry weight) is probably not influencing the faunal differences found, since the two sites with the highest levels of gastropod density and number of species (Ribeira and Flamengo shores) had respectively the highest and lowest values of Sargassum dry weight, other unmeasured structural differences (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…In the Brazilian coast, the brown algae Sargassum C. Agardh are among the most representative, especially in south-eastern Brazil (Széchy & Paula, 2000). With many different alien species registered in the region, such as Sargassum cymosum , Sargassum furcatum , Sargassum filipendula and Sargassum stenophyllum (Leite et al ., 2007; Carvalho et al ., 2018), this genus is marked by large fronds, high biomass and extensive branching, thus presenting a complex, highly variable morphology, with structural variations in frond size, number and size of stalks and branches, depending not only on species identity, but also on environmental variables, which generates intraspecific plasticity (Jacobucci & Leite, 2002; Leite et al ., 2007). For the present study the sampled algae are collectively referred to hereafter as Sargassum .…”

Section: Introductionmentioning

confidence: 99%

The highly diverse gastropod assemblages associated with Sargassum spp. (Phaeophyceae: Fucales) habitats

et al. 2019

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Macrophytes provide a habitat for many species of marine invertebrates, the gastropods being one of the main components. This study provides new information about Sargassum-associated gastropod biodiversity, through characterization of the fauna from a highly impacted area of Brazil, investigating its variation at a small spatial scale and between two main seasons of the year, as well as its relationship with macroalgae parameters. Density of gastropods was higher during the warmest season and varied throughout sampling sites. A significant and positive, however weak, relationship between gastropod density and Sargassum dry weight was found in all localities. For all sites, a marked and unusual dominance of Bittiolum varium was observed. The high dominance of this species seems to be related to the impacts caused by shipping activities and highway construction in the 1970s and 1980s, which caused a decline in local species diversity that seems to have continued until now. Many species, both typical of these habitats and characteristic of other, nearby habitats, benefit from Sargassum sp. These macrophytes allow gastropods to establish and grow during their most vulnerable stages, as shown by the growth series and juvenile forms found for most species of gastropods. The present data highlight the importance of macrophyte habitats for gastropod biodiversity in coastal areas and call attention to the importance of raising knowledge on this fauna, especially in impacted areas, thus contributing to the conservation of these highly diverse and ecologically important macrophyte–gastropod systems.

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Section: Discussionmentioning

confidence: 99%

Peer Review #1 of "Colonization of novel algal habitats by juveniles of a marine tube-dwelling amphipod (v0.1)"

2020

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Background. Dispersal is an important process affecting population dynamics and connectivity. For marine direct developers, both adults and juveniles may disperse.Although the distribution of juveniles can be initially constrained by their mothers' choice, they may be able to leave the parental habitat and colonize other habitats. We investigated the effect of habitat quality, patch size and presence of conspecific adults on the colonization of novel habitats by juveniles of the tube-dwelling amphipod Cymadusa filosa associated with the macroalgal host Sargassum filipendula. Methods. We tested the factors listed above on the colonization of juveniles by manipulating natural and artificial plants in both the field and laboratory. Results. In the laboratory, juveniles selected highquality habitats (i.e. natural alga), where both food and shelter are provided, when lowquality resources (i.e. artificial alga) were also available. In contrast, habitat quality and algal patch size did not affect the colonization by juveniles in the field. Finally, the presence of conspecific adults did not affect the colonization of juveniles under laboratory condition but had a weak effect in the field experiment. Our results suggest that C. filosa juveniles can select and colonize novel habitats, and that such process can be partially affected by habitat quality, but not by patch size. Also, the presence of conspecifics may affect the colonization by juveniles. Successful colonization by this specific developmental stage under different scenarios indicates that juveniles may act as a dispersal agent in this species.

show abstract

The structure of gammarid amphipod (Crustacea, Peracarida) assemblages associated with Sargassum (Phaeophyta, Fucales) and their link with the structural complexity of algae

Cited by 31 publications

References 55 publications

Colonization of novel algal habitats by juveniles of a marine tube-dwelling amphipod

Colonization of novel algal habitats by juveniles of a marine tube-dwelling amphipod

The highly diverse gastropod assemblages associated with Sargassum spp. (Phaeophyceae: Fucales) habitats

Peer Review #1 of "Colonization of novel algal habitats by juveniles of a marine tube-dwelling amphipod (v0.1)"

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