Structure and dynamics of the biota associated with &lt;i&gt;Macrocystis pyrifera&lt;/i&gt; (Phaeophyta) from the Beagle Channel, Tierra del Fuego

Adami, Mariana Laura; Gordillo, Sandra

doi:10.3989/scimar.1999.63s1183

Cited by 67 publications

(46 citation statements)

References 7 publications

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“…Within this habitat, the widespread kelp forest formed by the brown macroalgae Macrocystis pyrifera plays a significant structuring role. Apparently this kelp forest offers specific microhabitats as well as food resources for the zoobenthos, causing a positive correlation between Macrocystis presence and zoobenthic diversity, abundance and biomass Vásquez and Buschmann 1997;Adami and Gordillo 1999;Gerdes and Montiel 1999;Ríos et al 2007). M. pyrifera kelp forests cover almost 30 % of the ca.…”

Section: Introductionmentioning

confidence: 99%

“…Based on trophic characteristics and associated species, Ojeda and Santelices (1984), Castilla (1985) and Adami and Gordillo (1999) developed a generalized trophic web of the M. pyrifera community by linking 20 taxa belonging to different functional groups like carnivores, which are best represented by asteroids; herbivores which include echinoids, amphipods and several species of gastropods; suspension feeders which include groups like sponges, bivalves and cirripedes; and detritus feeders which include decapod, ophiuroid and polychaete species.…”

Section: Introductionmentioning

confidence: 99%

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Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan

et al. 2016

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Trophic structure is among the most fundamental characteristics of an ecosystem since it is a useful way to determine the main energy flow at the ecosystem level. In the Magellan Strait, the local spatial heterogeneity at the shallow-waters ecosystems may have a great variety of potential food sources; however, knowledge about their biological communities and their structure is still unclear. We examined the trophic structure of shallow-water-mixed bottom communities at two sites in the sub-Antarctic Magellan Strait based on carbon (d 13 C) and nitrogen (d 15 N) stable isotope ratios. The benthic communities were composed of 46 species from 20 major taxa at Bahía Laredo (BL) and 55 species from 18 major taxa at Punta Santa Ana (PSA). Benthic macroalgae and organic matter associated with sediment are the major primary food sources at both sites. Although both sites are quite similar in their food sources and in their vertical trophic structure (Cthree trophic levels), the food web structure varied distinctly. Functionally, predators and grazers dominated both communities, but top predators were shorebirds, carnivore anemones and predatory nemerteans at BL, and sea stars, shorebirds, crabs and fishes at PSA. The distinct differences in the trophic structure at BL and PSA highlight the important variability of d 15 N at the base of the benthic food web, the role of local environmental conditions and community dynamics in structuring shallow-water communities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan

et al. 2016

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“…Most of the earlier studies focused on the subantarctic (e.g. Arnaud 1974;Smirnov 1982;Smith andSimpson 1998, 2002) or southern tip of South America (Ojeda and Santelices 1984;Adami and Gordillo 1999;Rios et al 2007). Only a few studies were dedicated to the Antarctic invertebrate fauna associated with this habitat.…”

Section: Introductionmentioning

confidence: 99%

Diversity and abundance of isopod fauna associated with holdfasts of the brown alga Himantothallus grandifolius in Admiralty Bay, Antarctic

Zemko¹,

Pabis²,

Siciński³

et al. 2015

Polish Polar Research

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Fifteen species of isopods, representing 10 families, were recorded on holdfasts of the brown alga Himantothallus grandifolius. Material was collected in the 15-75 m depth range during the austral summer of 1979/80. The isopod community was dominated by Caecognathia antarctica (mean density 12.4 ± 13.1 ind./100 ml) followed by Cymodocella tubicauda (mean density 0.7 ± 2.1 ind./100 ml). Mean total density of isopods reached the value of 16.1 ± 14.0 ind./100 ml. The comparison with the other studies showed that hold− fasts are inhabited by a distinctive isopod community that differs from the isopod fauna as− sociated with soft bottom of Admiralty Bay.

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“…Invertebrate communities associated with Durvillea antarctica holdfasts from the Subantarctic Macquarie Island were also recently described by Simpson (1998, 2002). Benthic macroinvertebrate communities associated with Macrocystis pyrifera have also been analysed in Southern Chile (Ojeda and Santelices 1984), the Strait of Magellan (Rios et al 2007) and in the Beagle Channel (Adami and Gordillo 1999).…”

Section: Introductionmentioning

confidence: 99%

Polychaete fauna associated with holdfasts of the large brown alga Himantothallus grandifolius in Admiralty Bay, King George Island, Antarctic

Pabis

Siciński

2010

Polar Biol

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The polychaete community associated with holdfasts of the brown alga Himantothallus grandifolius in Admiralty Bay has been studied. It is the first study of its kind in this area and only the second in the Antarctic. Samples were collected in the summer season of 1979/ 1980 from a depth range of 10-75 m. Seventy-eight species were found on 19 holdfasts. The community was dominated by Brania rhopalophora and Neanthes kerguelensis. Analysis of similarity showed that polychaete fauna associated with this habitat did not show any partitioning related to depth. Regression analysis showed that densities of both species and individuals decreased with increased holdfast volume. A positive correlation was found between the number of individuals and holdfast volume. Polychaetes from 10 feeding guilds were found with dominance of macrophagous motile herbivores and sessile filter feeders. The complex habitat provided by holdfasts is a shelter for a rich polychaete fauna and may function as important protection from disturbance in the shallow areas of Admiralty Bay.

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Structure and dynamics of the biota associated with <i>Macrocystis pyrifera</i> (Phaeophyta) from the Beagle Channel, Tierra del Fuego

Cited by 67 publications

References 7 publications

Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan

Trophic structure of shallow-water benthic communities in the sub-Antarctic Strait of Magellan

Diversity and abundance of isopod fauna associated with holdfasts of the brown alga Himantothallus grandifolius in Admiralty Bay, Antarctic

Polychaete fauna associated with holdfasts of the large brown alga Himantothallus grandifolius in Admiralty Bay, King George Island, Antarctic

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