Associated fauna of Prasiola crispa (Chlorophyta) related to penguin rookery at arctowski (King George Island, South Shetland Islands, Maritime Antarctic)

Dalto, Adriana Galindo; Faria, Geyze Magalhães de; Imbassahy, Caio Amitrano de Alencar; Campos, Tais Maria de Souza; Yoneshigue‐Valentin, Yocie

doi:10.4322/apa.2014.048

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…More recent studies showed that P. crispa is inhabited by rotifers (Suren 1990;Everitt 1981) and tardigrades (Dougherty & Harris 1963;Miller et al 1988;Miller & Heatwole 1996;Sohlenius et al 2004;Heatwole & Miller 2019). Other small animals are found in P. crispa (Sinclair et al 2006;Dalto et al 2010;De Mendonça et al 2012;Gantz et al 2018), including Belgica antarctica, the Antarctic endemic insect (Sugg et al 1983). It is likely that terrestrial algae provide favourable microhabitats for invertebrates, and some results indicate that arthropods prefer algae to mosses because of the feeding conditions (Bokhorst et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Extremely high abundances of Prasiola crispa-associated micrometazoans in East Antarctica

2022

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To elucidate poorly known aspects of the microscopic metazoan distribution in ice-free parts of the Antarctic, we examined samples of the multicellular terrestrial alga Prasiola crispa, collected over the last decade in different parts of continental East Antarctica and Haswell Island. We found that the micrometazoans inhabiting the algae consist of remarkably abundant bdelloid rotifers (subclass Bdelloidea), followed by tardigrades. We did not find nematodes. The rotifer assemblages were characterized by low diversity (only six species). Nevertheless, rotifer densities were extremely high: mean densities ranged from 75 to 3030 individuals per 100 mg of the dry sample weight and the maximum value numbered in excess of 8000 per 100 mg of the dry sample weight. These data show that terrestrial algae, along with mosses, are a very attractive habitat for rotifers and tardigrades in the Antarctic. The statistical analysis showed a lack of correlations between rotifer and tardigrade densities and nutrients (N, C, P, K and Na). Our findings are consistent with the patchy distribution of terrestrial micrometazoans in the Antarctic that has previously been found.

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Section: Discussionmentioning

confidence: 99%

Extremely high abundances of Prasiola crispa-associated micrometazoans in East Antarctica

2022

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“…Mouratov et al (2001) studied the negative correlation between the abundance of nematodes and soil moisture. Dalto et al (2010) studied the fauna associated with Prasiola crispa (Chlorophyta), a terrestrial green alga, nding the Plectus nematode in great abundance. Ileva-Makulec et al (2009) studied the abundance and trophic diversity of nematodes which increased with the age of ice-free areas.…”

Section: Introductionmentioning

confidence: 99%

Diversity and abundance of free-living nematodes from Carlini station, Isla 25 de Mayo/King George Island, Antarctica: A case study in pristine and disturbed soils

Salas

Fusaro

Rusconi

et al. 2023

Preprint

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This study describes the soil nematodes of King George Island (Isla 25 de Mayo) in Antarctica through molecular identification, abundance, and structure analysis. Nematodes are key organisms in terrestrial ecosystems, with important roles in nutrient cycling and trophic networks. Despite the harsh conditions in the extreme environment of Antarctica, these organisms have managed to adapt and survive. Soil samples were collected from pristine and disturbed areas, and morphological and molecular analyses were conducted to identify the nematode species present. Abundance, trophic groups, maturity indices, and colonizer-persister values (cp) were analyzed and compared between the sampling sites. The molecular results revealed four genera of Antarctic nematodes (Coomansus, Calcaridorylaimus, Eudorylaimus, and Plectus), and the phylogenetic relationships of these nematodes with others found in Antarctica were established. ANOSIM and SIMPER statistical analysis showed significant differences in nematode abundance between pristine and disturbed areas. The analysis of the nematode assemblage through MI, EI, and SI showed less disturbance at the pristine sites than at the anthropic sites. Further studies should be carried out at the Carlini Station and 25 de Mayo/King George Island to learn more about the structure of the nematode community and how they are affected by anthropic practices in Antarctic environments.

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Diversity and abundance of free-living nematodes from Carlini Station, 25 de Mayo/King George Island, Antarctica: a case study in pristine and disturbed soils

Salas,

Fusaro,

Rusconi

et al. 2023

Polar Biol

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Associated fauna of Prasiola crispa (Chlorophyta) related to penguin rookery at arctowski (King George Island, South Shetland Islands, Maritime Antarctic)

Cited by 3 publications

References 18 publications

Extremely high abundances of Prasiola crispa-associated micrometazoans in East Antarctica

Extremely high abundances of Prasiola crispa-associated micrometazoans in East Antarctica

Diversity and abundance of free-living nematodes from Carlini station, Isla 25 de Mayo/King George Island, Antarctica: A case study in pristine and disturbed soils

Diversity and abundance of free-living nematodes from Carlini Station, 25 de Mayo/King George Island, Antarctica: a case study in pristine and disturbed soils

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