Gabriela Laura Campana

Gabriela Laura Campana
Instituto Antártico Argentino | IAA · Department of Coastal Biology

Dr.

About

37
Publications
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Introduction
Dr. Gabriela Laura Campana currently works at the Department of Coastal Biology, Instituto Antártico Argentino. Gabriela´s research focus is on the ecology of benthic primary producers (macroalgae and diatoms) in Antarctica. Her current project is Biodiversity, structure, dynamics and interactions in communities of benthic primary producers in an Antarctic coastal site impacted by glacier retreat. She participates in the project Marine Antarctic Food Webs: complexity, structure and stability.

Publications

Publications (37)
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
Fragilariopsis is a marine diatom genus that has a critical ecological role in Antarctic waters due to its high abundance and ubiquity in plankton and sea ice. Several species of Fragilariopsis are used extensively in paleoceanography due to their good preservation in marine sediments. Detailed morphological studies on Fragilariopsis species from A...
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...
Chapter
Antarctic macroalgae are the basis of marine food webs in most coastal environments, especially the more confined ones such as bays and fjords. Whether through direct consumption or via detritus, their role in maintaining biodiversity is essential. However, their relevance is due not only by direct trophic interactions but also by indirect feedback...
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...
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...
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...
Article
Full-text available
We report the formation of gas-vesicle stalked aggregates formed by a mucoid-sediment layer colonized by antarctic pennate diatoms and occasional centric diatoms.
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...
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...
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
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
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...

Network

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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.