• Home
  • Dolores Deregibus
Dolores Deregibus

Dolores Deregibus
Instituto Antártico Argentino/CONICET

PhD

About

28
Publications
7,019
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
473
Citations
Additional affiliations
October 2008 - present
Instituto Antártico Argentino
Position
  • PhD Student
October 2008 - June 2017
Instituto Antártico Argentino
Position
  • Researcher

Publications

Publications (28)
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
A correction to this paper has been published: https://doi.org/10.1007/s00300-021-02834-3
Article
Full-text available
Climate change-induced glacial melt affects benthic ecosystems along the West Antarctic Peninsula, but current understanding of the effects on benthic primary production and respiration is limited. Here we demonstrate with a series of in situ community metabolism measurements that climate-related glacial melt disturbance shifts benthic communities...
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
In order to set a base line for the observation of planktonic community changes due to global change, protistan plankton sampling in combination with phycotoxin measurements and solid phase adsorption toxin tracking (SPATT) was performed in two bays of King George Island (KGI) in January 2013 and 2014. In addition, SPATT sampling was performed in P...
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...
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...
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
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...
Article
Full-text available
Unraveling food webs is a first step toward understanding of ecosystem functioning and a requirement to forecast climate-induced ecosystem responses. In this study, the organisms under examination were benthic copepods (order Harpacticoida) inhabiting a fjord-like environment on the southern coastline of King George Island at the northwestern tip o...
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...

Network

Cited By

Projects

Projects (3)
Project
CoastCarb is an international Research Network that follows an interdisciplinary approach to understanding the consequences of Climate Change in the Beagle Channel and the coastal Western Antarctic, a region of recent rapid aerial warming. The CoastCarb Network for Staff Exchange and Training is funded by the Marie Curie Action RISE (Research and Innovation Staff Exchange) of the Horizon 2020 Framework Programme of the European Union (H2020-MCSA-RISE 872690). Climate change and intensifying human resource use are causing massive changes to Subantarctic coastal systems and carbon cycling. At the same time, these systems house benthic communities of the highest biomass and biodiversity, which sustain important ecosystem services and require strategic observation and management plans. The multidisciplinary network CoastCarb joins experts in Subantarctic coastal system ecology and ecological modelling to create a knowledge information system with open access data portal and produce dynamic ecosystem models for fjordic and estuarine environments. CoastCarb has five specific objectives that will be pursued by five work-packages (WP): Obj 1 - Data and Information System (DIS): Compile a geo-referenced data information system for Souuth Patagonia (SP) and West Antarctic Peninsula (WAP) coastal change, including abiotic environmental factors, disturbance levels, and mapping coastal biosphere (WP1). Obj 2 - Ecosystem Modelling: Develop a carbon flux model for SP/WAP coastal fjords and estuaries, considering different ecosystem processes such as carbon sequestration (production, coastal runoff fluxes, deposition and burial) and mobilization (bioturbation, remineralization, transport processes) (WP2). Obj 3 – Species Metrics & Multiple Stressors: Parameterise the response of coastal biosphere (key species, groups, key communities) to environmental change for different focal areas along SP and the WAP. Identify and fill present data gaps (WP3). Obj 4 - Ecosystem Change and Carbon Storage: Develop a coastal status classification scheme (dynamic mapping of carbon sink and source areas) (WP4). Obj 5 - Ecosystem Services, Food Security and Public Engagement: Contribute to the analysis of ecosystem service changes, sustainable management and public engagement (WP5). Obj 6 - Managment and Ethichs, plus Science Communication (WP6). www.coastcarb.eu
Project
The main objective is to explore complexity (i.e. richness, link density, connectance), structure (i.e. small-world topology) and stability (i.e. extinction simulations, stability indices and proxies) in well-resolved marine food webs. The specific objectives are: 1) to construct the food web (FW) for Potter Cove ecosystem (Isla 25 de Mayo/King George Is., Antartica), a fjord subjected to climate change effects; 2) to analyze the complexity and structure of the network in the context of the most-studied marine FWs; 3) to analyze the small-world topology in marine food webs, a general structure related to the spread of perturbations (i.e. loss of biodiversity, local climate change effects, etc); 4) to examine the degree distribution and overlap graphs (competition and resource graphs) in order to gain insight into the ecosystem dynamics and functioning; 5) to study the relationship between complexity, structural properties and stability in marine food webs.