Teresa Amaro

Teresa Amaro

PhD in Environmental Sciences

About

40
Publications
17,884
Reads
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1,550
Citations
Introduction
I am a deep-sea ecologist with a wide interest to understand trophic ecology in different deep-sea ecosystems, including submarine canyons, abyssal plains and seamounts in contrasting ocean basins (Atlantic, Pacific, Mediterranean). I would also like to deepen my understanding of how biological processes of the oceans contribute to global climate change. Currently, I am involved in collaborative projects where I specifically aim to understand: a) effects of suspended and resettled sediment plumes and differences in nodule coverage on organic matter remineralization by benthic communities, including microorganisms, meio-, macro- and megafauna, and b) the toxicity effects of sediment plumes on pelagic and and infaunal organisms.
Additional affiliations
May 2019 - present
University of Porto
Position
  • Researcher
March 2017 - March 2018
University of Porto
Position
  • Research Assistant
June 2016 - January 2017
Stazione Zoologica Anton Dohrn
Position
  • Researcher
Education
January 2000 - September 2005
September 1993 - September 1998
University of Porto
Field of study

Publications

Publications (40)
Article
Full-text available
Abyssal plains cover more than half of Earth’s surface, and the main food source in these ecosystems is phytodetritus, mainly originating from primary producers in the euphotic zone of the ocean. Global climate change is influencing phytoplankton abundance, productivity and distributions. Increasing importance of picoplankton over diatom as primary...
Article
Full-text available
The abyssal plain covers more than half the Earth’s surface. The main food source to abyssal ecosystems is phytodetritus, which originates from phytoplankton in the surface ocean, and thus its variability to the seafloor is a major driver of abyssal ecosystem biomass and functioning. In this study, we conducted a comparative survey on organic matte...
Article
Full-text available
Determining the lipid content and fatty acid (FA) composition of aquatic organisms has been of major interest in trophic ecology, aquaculture, and nutrition for over half a century. Although protocols for lipid analysis are well-described, their application to aquatic sciences often requires modifications to adapt to field conditions and to sample...
Article
Deep-sea benthic communities depend on the export of organic matter (OM) from the surface ocean. However, the effects of the pelagic-benthic coupling and the specific link between changing seasonal OM inputs and physiological changes of the mega-benthic community remain unclear. In this study, we identified differences in OM quality and quantity at...
Technical Report
Full-text available
MERCES is producing a census of European marine key habitat maps, degraded habitat maps and investigating key habitat restoration potential.
Technical Report
Full-text available
The overall scope of MERCES Deliverable 1.2 is to review current knowledge regarding the major marine pressures placed upon marine ecosystems in EU waters and the mechanisms by which they impact habitats in order to determine potential restoration pathways.
Poster
Full-text available
One of the main goals of MERCES project (http://www.merces-project.eu/) is to produce a census of available maps for marine habitats, along with their degradation status and restoration potential in the European Seas. To achieve this goal, we performed an extensive review and compiled a catalogue with mapping sources for (a) marine key-habitats, (b...
Article
Carbon dioxide capture and storage (CCS), involving the injection of CO2 into the sub-seabed, is being promoted worldwide as a feasible option for reducing the anthropogenic CO2 emissions into the atmosphere. However, the effects on the marine ecosystems of potential CO2 leakages originating from these storage sites have only recently received scie...
Chapter
Full-text available
There are at least 817 submarine canyons in the Mediterranean, Marmara and Black seas. They constitute important features of continental margins from geological, biological and oceanographic perspectives. In terms of geo-morphology they are quite different from those occurring in the rest of the world: they are in general steeper, more closely spac...
Article
Full-text available
Atmospheric CO2 emissions are a global concern due to their predicted impact on biodiversity, ecosystems functioning and human life. Among the proposed mitigation strategies, CO2 capture and storage (CCS), primarily the injection of CO2 into marine deep geological formations has been suggested as a technically practical option for reducing emission...
Article
Full-text available
Anthropogenic litter is present in all marine habitats, from beaches to the most remote points in the oceans. On the seafloor, marine litter, particularly plastic, can accumulate in high densities with deleterious consequences for its inhabitants. Yet, because of the high cost involved with sampling the seafloor, no large-scale assessment of distri...
Data
Ongoing greenhouse gas emissions can modify climate processes and induce shifts in ocean temperature, pH, oxygen concentration, and productivity, which in turn could alter biological and social systems. Here, we provide a synoptic global assessment of the simultaneous changes in future ocean biogeochemical variables over marine biota and their broa...
Article
Full-text available
Ongoing greenhouse gas emissions can modify climate processes and induce shifts in ocean temperature, pH, oxygen concentration, and productivity, which in turn could alter biological and social systems. Here, we provide a synoptic global assessment of the simultaneous changes in future ocean biogeochemical variables over marine biota and their broa...
Data
Full-text available
a b s t r a c t In recent years increasing knowledge has been accumulated on seamounts ecology; however their sedimentary environments and associated biological communities remain largely understudied. In this study we investigated quantity and biochemical composition of organic matter and macrofaunal diversity in sediments of the Condor Seamount (...
Article
Ongoing greenhouse gas emissions can modify climate processes and induce shifts in ocean temperature, pH, oxygen concentration, and productivity, which in turn could alter biological and social systems. Here, we provide a synoptic global assessment of the simultaneous changes in future ocean biogeochemical variables over marine biota and their broa...
Article
Sediments in the Nazaré Canyon (NE Atlantic) are inhabited by unexpectedly high abundances of the deposit-feeding holothurian Molpadia musculus. The energetic demand of such a large megafaunal biomass is presumably high and requires the efficient exploitation of the food inputs coming from the photic zone. We hypothesise the existence of cooperativ...
Article
Full-text available
Megafaunal organisms play a key role in ecosystem functioning in the deep-sea through bioturbation, bioirrigation and organic matter cycling. At 3500 m water depth in the Nazaré Canyon, NE Atlantic, very high abundances of the infaunal holothurian Molpadia musculus were observed. To quantify the role of M. musculus in sediment cycling, sediment sam...
Article
Full-text available
Megafaunal organisms play a key role in the deep-sea ecosystem functioning. At 3500 m depth in the Nazaré Canyon, NE Atlantic, very high abundances of the infaunal holothurian Molpadia musculus were found. Sediment samples and holothurians were collected by ROV and experiments were conducted in situ in incubation chambers. The biochemical compositi...
Article
Full-text available
The Nazare submarine canyon extends similar to 210 km westward from the coast of Portugal, down to a water depth of > 4300 m. The considerable habitat heterogeneity found throughout the canyon is affected by strong currents and high turbidity, especially in the upper parts of the canyon. The canyon morphology comprises steep slopes, scarps, terrace...
Article
Megafaunal organisms play a key role in ecosystem functioning in the deep-sea through bioturbation, bioir-rigation and organic matter cycling. At 3500 m water depth in the Nazaré Canyon, NE Atlantic, very high abundances of the infaunal holothurian Molpadia musculus were observed. To quantify the role of M. musculus in sediment cycling, sediment sa...
Article
Deposit-feeding holothurians often dominate the megafauna in bathyal deep-sea settings, in terms of both abundance and biomass. Molpadia musculus is particularly abundant at about 3400 m depth in the Nazaré Canyon on the NE Atlantic Continental Margin. However, these high abundances are unusual for burrowing species at this depth. The objective of...
Article
Full-text available
The Nazaré submarine canyon extends ~ 210 km westward from the coast of Portugal, down to a water depth of > 4300 m. The considerable habitat heterogeneity found throughout the canyon is affected by strong currents and high turbidity, especially in the upper parts of the canyon. The canyon morphology comprises steep slopes, scarps, terraces, and ov...
Article
Full-text available
The Nazare submarine canyon extends similar to 210 km westward from the coast of Portugal, down to a water depth of > 4300 m. The considerable habitat heterogeneity found throughout the canyon is affected by strong currents and high turbidity, especially in the upper parts of the canyon. The canyon morphology comprises steep slopes, scarps, terrace...
Article
In the early 1990’s a conspicuous shift took place in the density of two key macrofauna species at the Frisian Front (SE North Sea). The density of the formerly dominant brittlestar Amphiura filiformis showed tenfold reduction and remained low throughout the observation period (1986–2000). In the same period, the burrowing mud shrimp Callianassa su...
Article
A sharp regime shift from a brittle star Amphiura filiformis dominated state to a burrowing mud shrimp Callianassa subterranea dominated situation was observed in a region of the North Sea known as the Frisian Front in the mid-1990s. No indications exist that food levels or other relevant conditions in this part of the North Sea had changed signifi...
Article
Internal growth lines in shells of 3 suspension-feeding bivalves (Arctica islandica, Mya truncata and Chamelea striatula) from the SE North Sea were analysed in search of common interannual variations of their growth rate. The high similarity (69 to 80 %) between the growth records in the 3 species suggests that a large-scale (climatic) factor is r...
Article
Previous investigations of the bivalve Mya truncata in the Southern North Sea revealed the absence of the 1987 to 2001 y classes. Because the species' southern-most distribution limit is the southern North Sea, at the Frisian Front, we examined if M. truncata was reproductively active in this region. Histologic sections of reproductive tissues from...
Article
In the southern areas of the Frisian Front (southern North Sea ), a drastic shift in the abundance of most of the macrobenthic fauna during 1992-1997 has also been revealed. Especially a shift in abundances from the brittle star Amphiura filiformis and the mud shrimp Callianassa subterranea was recorded. Amphiura filiformis had a main peak in densi...
Article
Annual monitoring of the benthic fauna living at the Frisian Front (southern North Sea) has shown a tenfold decrease in the dominant brittlestar Amphiura filiformis in 1993–1995. In search of evidence that this decline was caused by a change in benthic food supply, we analysed variations in the shell growth of the bivalve Mya truncata from the Fris...

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