Coalescence in wild organisms of the intertidal population of Lessonia berteroana in northern Chile: management and sustainability effects

Rodríguez, Dení; Oróstica, Mauricio H.; Vásquez, Julio A.

doi:10.1007/s10811-013-0121-5

Cited by 14 publications

(19 citation statements)

References 32 publications

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“…Thus, determining the key ecological mechanisms at play in exploited natural communities is relevant to understand their vulnerability and resilience potential (e.g. soft-sediments and seafloor: Thrush & Dayton 2002; corals reef: Hughes et al 2010; kelp communities: Dayton et al 1984, 1992, Steneck et al 2002, 2013, Graham 2004, Wernberg et al 2010. The patterns of spatial distribution between individuals are an important ecological attribute that is readily altered by exploitation of benthic communities.…”

Section: Introductionmentioning

confidence: 99%

“…Herbivory influences both intra-and interspecific relationships in local communities and modifies the landscape structure (Duffy 2002, Poore et al 2012. In this way, the role of herbivores is especially relevant in human-disturbed communities where impacts on the spatial distribution and composition of primary producers can be either compensated or intensified by herbivory (Tegner & Dayton 2000, Steneck et al 2002, 2013, Graham 2004, Tamburello et al 2014.…”

Section: Introductionmentioning

confidence: 99%

“…In temperate habitats, kelp species are harvested through whole-plant or vegetative tissue removal (Tegner & Dayton 2000, Steneck et al 2002, 2013, Vásquez 2008. Along the Chilean coast, the dominant kelp species inhabiting intertidal habitats are Lessonia spp., which are heavily harvested by local fishermen who traditionally remove the whole plant from the substrate (see Fig.…”

Section: Introductionmentioning

confidence: 99%

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Effect of grazing on distribution and recovery of harvested stands of Lessonia berteroana kelp in northern Chile

Oróstica¹,

Aguilera²,

Donoso³

et al. 2014

Mar. Ecol. Prog. Ser.

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Understanding the ecological factors regulating exploited natural communities is important in establishing conservation and management strategies. Since the 1960s, artisanal fishermen have harvested up to 300 000 dry tons yr −1 of wild populations of Lessonia spp. kelps. Adult kelps form a key habitat on the rocky shores of Chile, and benthic grazers regulate kelp populations by grazing or bulldozing microscopic and juvenile stages. To establish the role of the grazer assemblage in the recovery of kelp stands following harvesting, we conducted a manipulative experiment simulating artisanal kelp extraction and then manipulating the presence of grazers. We followed community succession and spatial distribution of L. berteroana recruits in manipulated and control rocky shore platforms for ca. 12 mo. Inter-individual distances of recruits and spatial autocorrelation analyses showed that the presence of grazers determined a patchy distributional pattern of L. berteroana. The aggregated spatial pattern of kelp recruits in the presence of grazers was followed by numerous coalescence events between small holdfasts, but no coalescence events were observed between recruits in the grazer removal areas. Our results suggest that grazing and recruit coalescence play an important role in the recovery of kelp stands following artisanal harvesting. Incorporating these processes into conservation and management strategies may bolster current strategies, which are based solely on the spatial structure of kelp stands.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of grazing on distribution and recovery of harvested stands of Lessonia berteroana kelp in northern Chile

Oróstica¹,

Aguilera²,

Donoso³

et al. 2014

Mar. Ecol. Prog. Ser.

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“…() and Rodriguez et al . () showed that fusions of individuals forming a PO might be recurrent in the kelp Lessonia berteroana Montagne (formerly Lessonia nigrescens , González et al . ).…”

Section: Introductionmentioning

confidence: 99%

On the advantage of sharing a holdfast: effects of density and occurrence of kin aggregation in the kelp Lessonia berteroana

et al. 2014

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“…abalony and sea urchins; Buschmann et al 2013). Kelp harvesting in Chile has a considerable social, economic and ecological importance, providing about 10% of the biomass of brown algae worldwide (FAO 2012), with an annual harvested weight of up to 300,000 dry tons (Va´squez et al 2008;Anuario Sernapesca 2014;Va´squez et al 2012;Rodriguez et al 2014). Five kelp or kelp-like species are found along the central Chilean coast (18 to 428S), namely, Lessonia berteroana Montagne, Lessonia spicata (Suhr) Santelices, Lessonia trabeculata Villouta & Santelices, Macrocystis pyrifera (Linnaeus) C. Agardh and Durvillaea antarctica (Chamisso) Hariot (Santelices 1989;Ramírez & Santelices 1991;Gonza´-lez et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Morphological convergence in the inter-holdfast coalescence process among kelp and kelp-like seaweeds (Lessonia, Macrocystis, Durvillaea)

et al. 2015

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Artículo de publicación ISISin acceso a texto completoIn brown macroalgae, intraspecific holdfast coalescence has only been studied in two species of Lessonia (Lessonia spicata and Lessonia berteroana). In both species coalescence followed the same general pattern: once the connection between holdfasts was established, the contact areas showed significant cellular morphological modifications. Typical epidermal cells became polygonal and similar to cortical cells. In addition, coalescence involved the de novo formation of secondary plasmodesmata, establishing a direct cytoplasm connection within neighbouring cells, where dense materials, vacuoles and organelles can be observed. In the present study, we demonstrate intraspecific holdfast coalescence in two additional kelp species, Lessonia trabeculata and Macrocystis pyrifera, as well as in the kelp-like seaweed, Durvillaea antarctica. The process of holdfast fusions in these species is similar to that described previously and suggests that this is a generalized phenomenon among kelp and kelp-like brown algae. In addition, the formation of cytoplasmic connections between genetically different brown algal individuals is shown for the first time.Fondecyt 1120129 1111012

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Coalescence in wild organisms of the intertidal population of Lessonia berteroana in northern Chile: management and sustainability effects

Cited by 14 publications

References 32 publications

Effect of grazing on distribution and recovery of harvested stands of Lessonia berteroana kelp in northern Chile

Effect of grazing on distribution and recovery of harvested stands of Lessonia berteroana kelp in northern Chile

On the advantage of sharing a holdfast: effects of density and occurrence of kin aggregation in the kelp Lessonia berteroana

Morphological convergence in the inter-holdfast coalescence process among kelp and kelp-like seaweeds (Lessonia, Macrocystis, Durvillaea)

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