Consulta: creatorFacets:"Girard, Fanny"
Registros recuperados: 4
Data/hora: 06/06/2024 09:28:06

Currents and topography drive assemblage distribution on an active hydrothermal edifice
Provedor de dados: 5
Autores: Girard, Fanny; Sarrazin, Jozee; Arnaubec, Aurelien; Cannat, Mathilde; Sarradin, Pierre-marie; Wheeler, Benjamin; Matabos, Marjolaine.
The deep sea is characterized by a wide range of landscapes, including complex features where topography and currents interact to form highly heterogeneous habitats. In addition to a complex topography, hydrothermal vent environments are characterized by strong environmental gradients that structure the spatial distribution of biological communities. The role of vent fluid temperature and chemical composition on species distribution is now well understood, but investigations on the effects of the complex sulfide edifice topography are scarce. Here, we used a novel approach combining 3D photogrammetric reconstruction, in situ environmental measurements and modeling to characterize assemblage distribution on the active edifice Eiffel Tower (Lucky Strike,...
Tipo: Text
Palavras-chave: Mid-Atlantic Ridge; Eiffel Tower; EMSO-Azores; Ecology; Imagery; 3D photogrammetry; Deep-sea observatories; Topographic effects.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00640/75211/75349.pdf

Impacts of an Eruption on Cold-Seep Microbial and Faunal Dynamics at a Mud Volcano
Provedor de dados: 5
Autores: Girard, Fanny; Sarrazin, Jozee; Olu, Karine.
Cold seeps are widespread in the deep sea and, like other chemosynthesis-based ecosystems, often host high faunal biomass. Temporal changes at seeps have been inferred by comparing communities at different successional stages; nonetheless, temporal studies in seep ecosystems are rare. Using data collected as part of a benthic observatory, we characterized intra-annual microbial and faunal dynamics in a microbial mat habitat on the Håkon Mosby mud volcano (1256 m depth; Barents Sea), and evaluated the effects of a mud eruption on the biota. Video sequences recorded twice daily for 4.5 months with an autonomous imaging module were analyzed to quantify changes in microbial mat cover and megafaunal density and behavior. In addition, time series data for...
Tipo: Text
Palavras-chave: Håkon Mosby Mud Volcano; LOOME; Arctic; Beggiatoa; Deep-sea observatories; Time series; Megafauna.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00624/73631/73069.pdf

In situ growth of deep-sea octocorals after the Deepwater Horizon oil  spill
Provedor de dados: 5
Autores: Girard, Fanny; Cruz, Rafaelina; Glickman, Orli; Harpster, Tyler; Fisher, Charles R.
Although the role of deep-sea corals in supporting biodiversity is well accepted, their ability to recover from anthropogenic impacts is still poorly understood. An important component of recovery is the capacity of corals to grow back after damage. Here we used data collected as part of an image-based long-term monitoring program that started in the aftermath of the Deepwater Horizon oil spill to develop a non-destructive method to measure in situ growth rates of Paramuricea spp. corals and characterize the impact of the spill on growth. About 200 individual coral colonies were imaged every year between 2011 and 2017 at five sites (three that were impacted by the spill and two that were not). Images were then used to test different methods for measuring...
Tipo: Text
Palavras-chave: Corals; Plexauridae; Growth rates; Non-destructive methods; Imagery; Anthropogenic impact.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59581/62577.pdf

Long-term impact of the Deepwater Horizon oil spill on deep-sea corals detected after seven years of monitoring
Provedor de dados: 5
Autores: Girard, Fanny; Fisher, Charles R.
Cold-water corals form high biodiversity habitats in the deep sea. They are generally long-lived, slow-growing, and thus particularly vulnerable to anthropogenic impact. We used high-definition imagery to quantify the impact and assess the recovery of deep-sea corals that were affected by the 2010 Deepwater Horizon oil spill in the Gulf of Mexico. Over three hundred Paramuricea spp. colonies were imaged yearly between 2011 and 2017 at five sites, and the images were digitized to quantify health, hydroid overgrowth, identify branch loss, and track recovery patterns. Although the median level of impact decreased after 2011 at all impacted sites, it has been stable since then and remained higher than at the reference sites. Recovery depended on the initial...
Tipo: Text
Palavras-chave: Anthropogenic impact; Recovery; Octocoral; Image analysis; Paramuricea biscaya.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56558/58268.pdf