Maria Liliana Quartino

Maria Liliana Quartino
Instituto Antártico Argentino | IAA · Coastal Biology

Dr

About

80
Publications
19,909
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,631
Citations
Additional affiliations
April 2005 - present
Museo Argentino de Ciencias Naturales Bernardino Rivadavia- CONICET
Position
  • Curator Associate- Plant Cell Herbarium

Publications

Publications (80)
Article
Full-text available
Endemic Antarctic macroalgae are especially adapted to live in extreme Antarctic conditions. Their potential biogeographic distribution niche is primarily controlled by the photoperiodic regime and seawater temperatures, since these parameters regulate growth, reproduction, and survival during the entire life cycle. Here we analyzed the upper survi...
Poster
Full-text available
Abstract: Las macroalgas antárticas ocupan un rol fundamental en la fijación de carbono en los sistemas costeros y su dinámica puede verse afectada por fenómenos de cambios en la cantidad de días de hielo anuales, asociado al cambio climático. En este trabajo se modeló la dinámica de dos tipos de macroalgas, según sus estrategias de crecimiento: se...
Article
Full-text available
Aquatic ecosystems are frequently overlooked as fungal habitats, although there is increasing evidence that their diversity and ecological importance are greater than previously considered. Aquatic fungi are critical and abundant components of nutrient cycling and food web dynamics, e.g., exerting top-down control on phytoplankton communities and f...
Article
Based on marine benthic diatoms collected at Potter Cove (Western Antarctic Peninsula), we present a detailed study, using both light and electron microscopy, of the morphology of Campyloneis frenguelliae, a species recently transferred from Cocconeis. Ultrastructural observations revealed a combination of new and unusual features within the Achnan...
Article
Full-text available
En el marco del ciclo “Pioneras: las científicas del Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (Buenos Aires, Argentina)” rendimos homenaje a mujeres que se han destacado en diversas actividades científicas en la Institución. En el año 2019 distinguimos al primer grupo de mujeres científicas argentinas que participaron de una cam...
Article
Full-text available
The microbiome of macroalgae facilitates their adaptation to environmental stress. As bacteria release algal growth and morphogenesis promoting factors (AGMPFs), which are necessary for the healthy development of macroalgae, bacteria play a crucial role in stress adaptation of bacterial-algal interactions. To better understand the level of macroalg...
Article
In marine ecosystems, macroalgae are the habitat for several microorganisms, fungi being among them. In the Antarctic benthic coastal ecosystem, macroalgae play a key role in organic matter cycling. In this study, 13 different macroalgae from Potter Cove and surrounding areas were sampled and 48 fungal isolates were obtained from six species, four...
Chapter
Despite the importance of benthic algal communities to Antarctic coastal ecosystems, much information about their dynamics is still needed. Primary succession processes in the Antarctic benthos are frequently initiated by ice-mediated disturbance and by the creation of denuded substrate following glacier retreat, both expected to increase in the fu...
Chapter
The natural environment of Antarctic seaweeds is characterized by changing seasonal light conditions. The ability to adapt to this light regime is one of the most important prerequisites for their ecological success. Thus, the persistence of seaweeds depends on their capacity to maintain a positive carbon balance (CB) for buildup of biomass over th...
Chapter
The Antarctic rocky coasts are mainly colonized by extensive seaweed communities, which play key roles as food resource, habitat, and refuge for many benthic and pelagic organisms. Due to climate warming, Antarctic marine ecosystems are being affected by glacier retreat opening new habitats, e.g., newly ice-free areas that can be colonized by macro...
Article
Full-text available
En el marco del ciclo “Pioneras: las científicas del Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (Buenos Aires, Argentina)” rendimos homenaje a mujeres que se han destacado en diversas actividades científicas en la Institución. En el año 2019 distinguimos al primer grupo de mujeres científicas argentinas que participaron de una cam...
Article
Full-text available
The Western Antarctic Peninsula (WAP) is a hot spot of global warming, including decreased sea-ice cover during winter and increased sedimentation during summer due to glacial melt. Subsequently, an altered irradiance and temperature regime in the water column may affect the performance of primary producers and change competitive structures. The br...
Presentation
Los sistemas glaciarios del oeste de la Península Antártica evidencian un marcado retroceso en su extensión y un incremento en la producción de agua de derretimiento. Estos cambios se han observado también durante las últimas décadas en el ecosistema costero de Caleta Potter (62° 14´S, 58° 40´O), donde se ha evidenciado un notable retroceso del gla...
Article
Full-text available
The Antarctic Peninsula experiences a fast retreat of glaciers, which results in an increased release of particles and sedimentation and, thus, a decrease in the available photosynthetic active radiation (PAR, 400–700 nm) for benthic primary production. In this study, we investigated how changes in the general sedimentation and shading patterns aff...
Article
Full-text available
Macroalgae are the main primary producers in polar coastal regions and of major importance for the associated heterotrophic communities. On King George Island/Isla 25 de Mayo, West Antarctic Peninsula (WAP) several fjords undergo rapid glacial retreat in response to increasing atmospheric temperatures. Hence, extended meltwater plumes laden with su...
Article
Full-text available
Glaciers along the western Antarctic Peninsula are retreating at unprecedented rates, opening up sublittoral rocky substrate for colonization by marine organisms such as macroalgae. When macroalgae are physically detached due to storms or erosion, their fragments can accumulate in seabed hollows, where they can be grazed upon by herbivores or be de...
Article
Full-text available
Studies on feeding selectivity in Antarctic fish with comparison between diet organisms and those available in the wild are scarce. We explored this issue in Notothenia rossii (NOR) and N. coriiceps (NOC) at Potter Cove in summer 2016 to test: (1) their preference among different benthic groups, primarily species of algae and amphipods and (2) diff...
Presentation
El cambio climático afecta todas las regiones del planeta, siendo notoriamente marcado en el oeste de la Península Antártica, con un aumento de la temperatura superficial del mar de 0,4 °C desde 1955. La temperatura es uno de los factores físicos más importantes que influyen en el desarrollo de las macroalgas, tanto en su crecimiento, como en la fo...
Conference Paper
Full-text available
Fragilariopsis es uno de los géneros de diatomeas más representativos de Antártida, en términos de su distribución y abundancia. Algunas especies de Fragilariopsis suelen dominar las comunidades microalgales del hielo marino y de la columna de agua, especialmente en áreas adyacentes al hielo estacional. El reconocimiento de Fragilariopsis como enti...
Poster
Full-text available
Macroalgae are important in marine benthic communities both for food resources and for their role as key habitats for several species. Modelling their dynamic and potental growth in these communities is a key point to understand the dynamics of the entire ecosystem functioning. We developed a model that simulates macroalgae biomass variation accord...
Article
Full-text available
Sea ice, including icebergs, has a complex relationship with the carbon held within animals (blue carbon) in the polar regions. Sea-ice losses around West Antarctica's continental shelf generate longer phytoplankton blooms but also make it a hotspot for coastal iceberg disturbance. This matters because in polar regions ice scour limits blue carbon...
Article
Full-text available
There is a general lack of information on the succession of marine benthic algae in Antarctica. We performed two colonization experiments in the upper subtidal (3 and 5 m depth) using artificial substrates in Potter Cove (South Shetland Islands): in the outer cove, an area mainly unaffected by sedimentation, and in the inner cove, in close proximit...
Article
Knowledge of the food web structure and complexity are central to better understand ecosystem functioning. A food-web approach includes both species and energy flows among them, providing a natural framework for characterizing species’ ecological roles and the mechanisms through which biodiversity influences ecosystem dynamics. Here we present for...
Article
Full-text available
Background: Scavenger guilds are composed of a variety of species, co-existing in the same habitat and sharing the same niche in the food web. Niche partitioning among them can manifest in different feeding strategies, e.g. during carcass feeding. In the bentho-pelagic realm of the Southern Ocean, scavenging amphipods (Lysianassoidea) are ubiquitou...
Preprint
Full-text available
Knowledge of the food web structure and complexity are central to better understand ecosystem functioning. A food-web approach includes both species and energy flows among them, providing a natural framework for characterizing species’ ecological roles and the mechanisms through which biodiversity influences ecosystem dynamics. Here we present for...
Presentation
Full-text available
The study of food web structure and complexity is central to better understand ecosystem functioning. A food-web approach includes both species and energy flows among them, providing a natural framework for characterizing species’ ecological roles and the mechanisms through which biodiversity influences ecosystem dynamics. Here we present for the f...
Conference Paper
Ensemble habitat modeling is a tool in the multivariate analysis of arbitrary species or community distribution which combines models of best fit to an optimized model (ensemble model, EM). To simulate spatial variation of communities and predict the impact of climate change, it is essential to identify the distribution-controlling factors. Macroal...
Article
Full-text available
The western Antarctic Peninsula (WAP) is a hotspot of rapid recent regional ‘climate change’. This has resulted in a 0.4°C rise in sea temperature in the last 50 years, five days of sea ice lost per decade and increased ice scouring in the shallows. The WAP shallows are ideal for studying the biological response to physical change because most know...
Article
Intertidal zones are one of the most studied habitats in the world. However, in Antarctica, further studies are needed for a more complete understanding of these systems. When conspicuous Antarctic intertidal communities occur, macroalgae are a key component. Given that intertidal communities have a fast response to variations in environmental cond...
Conference Paper
Full-text available
Los intermareales se encuentran entre los ambientes más estudiados del mundo, sin embargo existe poca información sobre los intermareales rocosos antárticos. Los mismos son escasos debido al bajo porcentaje de superficie terrestre antártica libre de hielo estacionalmente. El estudio se llevó a cabo en el intermareal rocoso Peñón 1 (62º 14’S, 58º 38...
Poster
Full-text available
In this work the combined effects of environmental disturbances associated with climate change (temperature increase and sedimentation) and grazing on benthic seaweed communities in early stages of the succession were evaluated.
Article
Full-text available
In Potter Cove, Antarctica, newly ice-free areas appeared due to glacial retreat. Simultaneously, the inflow of sediment increased, reducing underwater photosynthetically active radiation (PAR, 400–700 nm). The aim of this study was to determine the photosynthetic characteristics of two macroalgal species colonizing three newly ice-free areas, A1,...
Article
Full-text available
Climate warming has been related to glacial retreat along the Western Antarctic Peninsula. Over the last years, a visible melting of Fourcade Glacier (Potter Cove, South Shetland Islands) has exposed newly ice-free hard bottom areas available for benthic colonization. However, ice melting produces a reduction of light penetration due to an increase...
Data
Climate warming has been related to glacial retreat along the Western Antarctic Peninsula. Over the last years, a visible melting of Fourcade Glacier (Potter Cove, South Shetland Islands) has exposed newly ice-free hard bottom areas available for benthic colonization. However, ice melting produces a reduction of light penetration due to an increase...
Article
Full-text available
Palmaria decipiens (Reinsch) R.W. Ricker (1987) represents one of the dominant rhodophyte species in Antarctic coastal ecosystems. Due to its high abundance in the intertidal and upper subtidal it plays a key role in ecosystem structure and function, providing habitat, food and shelter for a multitude of associated organisms. The physiology, reprod...
Chapter
Full-text available
This work synthesizes the current state of knowledge on the biology of polar benthic marine algae and presents an outlook on their responses to changing environmental conditions in polar regions. Topics treated include environment, biodiversity and biogeography of micro- and macroalgae, including an update of the knowledge of the red algal flora of...
Article
Full-text available
Information on succession in marine benthic primary producers in polar regions is very scarce, particularly with regard to effects of abiotic and biotic drivers of community structure. Primary succession begins with rapid colonizers, such as diatoms and ephemeral macroalgae, whereas slow, highly seasonal recruitment and growth are characteristic of...
Article
Full-text available
This paper reviews the composition, biogeography and zonation of benthic algae in Arctic and Antarctic polar regions. There is a marked contrast in the literature between the amount of information on microalgae vs. macroalgae. Perhaps not surprising in view of their size and conspicuous nature, the macroalgae are better known than the microalgae an...
Article
Full-text available
Polar algae have a striking ability to photosynthesize and grow under very low light and temperatures. In seaweeds, minimum light demands for photosynthetic saturation and compensation can be as low as 10 and 2 mu mol photons m(-2) s(-1), respectively. For benthic microalgae, these values can be even lower because of the limited irradiance reaching...
Article
Full-text available
The sensitivity of different life stages of the eulittoral green alga Urospora penicilliformis (Roth) Aresch. to ultraviolet radiation (UVR) was examined in the laboratory. Gametophytic filaments and propagules (zoospores and gametes) released from filaments were separately exposed to different fluence of radiation treatments consisting of PAR (P =...
Article
Full-text available
This paper reviews the composition, biogeography and zonation of benthic algae in Arctic and Antarctic polar regions. There is a marked contrast in the literature between the amount of information on microalgae vs. macroalgae. Perhaps not surprising in view of their size and conspicuous nature, the macroalgae are better known than the microalgae an...
Article
Full-text available
Polar algae have a striking ability to photosynthesize and grow under very low light and temperatures. In seaweeds, minimum light demands for photosynthetic saturation and compensation can be as low as 10 and 2 mmol photons m-2 s-1 , respectively. For benthic microal-gae, these values can be even lower because of the limited irradiance reaching dee...
Article
Full-text available
Information on succession in marine benthic primary producers in polar regions is very scarce, particularly with regard to effects of abiotic and biotic drivers of community structure. Primary succession begins with rapid colonizers, such as diatoms and ephemeral macroalgae, whereas slow, highly seasonal recruitment and growth are characteristic of...
Article
Full-text available
Summer macroalgal biomass and production were analyzed at Potter Cove, King George Island, Antarctica and the potential carbon transfer of macroalgal production to the coastal ecosystem of the cove was estimated. A total of 38 algal species were found, with Desmarestia anceps, D. menziesii and Himantothallus grandifolius accounting for almost 80% o...
Conference Paper
Full-text available
The areas with soft sediments without algae were delimited according with Klöser et al. (1996). The monthly average production (P) (g.m -2 )of species i at two sites (Barton and Pinitos):was calculated at each depth i At the same two sites the P/B rate was determined for:each species,-each depth-each date. The macroalgal biomass production of the m...
Article
Full-text available
We describe the macroalgal assemblages in Potter Cove and their distribution by depth, substratum, irradiation, nutrients, salinity, water temperature and light period. We determined groups by using K-means, the Hellinger index and the maximum Calinski-Harabasz pseudo-F-statistic as stopping rule. Indicator species were assessed with the IndVal ind...
Article
We describe the macroalgal assemblages in Potter Cove and their distribution by depth, substratum, irradiation, nutrients, salinity, water temperature and light period. We determined groups by using K-means, the Hellinger index and the maximum Calinski-Harabasz pseudo-F-statistic as stopping rule. Indicator species were assessed with the IndVal ind...
Article
A histological method is described allowing the identification of macro-algal fragments from stomach contents of fish. The rhodophytes Porphyra endiviifolium and Neuroglossum ligulatum were determined from the stomach contents of the Antarctic fish Notothenia coriiceps. The results show P. endiviifolium to be a more important part in the diet of th...