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Richard A. Phillips, Jérôme Fort, Maria P. Dias. (2023). Chapter 2 – Conservation status and overview of threats to seabirds.
Abstract: Seabirds are among the most threatened of all vertebrate groups. Here we review their conservation status and key aspects of the main threats and some emerging threats. Bycatch in fisheries and overfishing are pervasive, but potentially soluble with improved governance. Invasive alien species at breeding sites remain a major threat despite notable recent successes in eradication campaigns. Changing climatic conditions continue to have multiple, increasing, direct and indirect effects on seabirds. The full impacts of disease and chemical pollution are less clear because effects may be sublethal. Impacts of other anthropogenic processes that currently concern relatively few species are probably increasing. As seabird populations are affected by multiple threats that may be additive or synergistic, addressing population declines will often require a suite of management measures and potentially compensatory mitigation for climate change.
Programme: 388
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Karen D. McCoy. (2021). Community-Level Interactions and Disease Dynamics.
Abstract: An ecological community includes all individuals of all species that interact within a single patch or local area of habitat. Understanding the outcome of host–parasite interactions and predicting disease dynamics is particularly challenging at this biological scale because the different component species interact both directly and indirectly in complex ways. Current shifts in biodiversity due to global change, and its associated modifications to biological communities, will alter these interactions, including the probability of disease emergence, its dynamics over time, and its community-level consequences. Birds are integral component species of almost all natural communities. Due to their ubiquity and specific life history traits, they are defining actors in the ecology, evolution, and epidemiology of parasitic species. To better understand this role, this chapter examines the relative importance of birds and parasites in natural communities, revisiting basic notions in community ecology. The impact of changes in diversity for disease dynamics, including the debate surrounding dilution and amplification effects are specifically addressed. By considering the intrinsic complexities of natural communities, the importance of combining data from host and parasite communities to better understand how natural systems function over time and space is highlighted. The different elements in each section of the chapter are illustrated with brief, concrete examples from avian species, with a detailed example from marine bird communities in which Lyme disease bacteria circulate.
Programme: 333
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Ramonet M., Chatterjee A., Ciais P., Levin I., Sha M., Steinbacher M., Sweeney C. (2023). CO₂ in the Atmosphere: Growth and Trends Since 1850.
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Jennifer F. Provencher, Stephanie Borrelle, Richard B. Sherley, Stephanie Avery-Gomm, Peter Hodum, Alex Bond, Heather L. Major, Karen D. McCoy, Rory Crawford, Flemming Merkel, Stephen Votier, Michelle Reynolds, Jeff Hatfield, Dena Spatz, Mark Mallory. (2019). Chapter 7 – Seabirds. Bachelor's thesis, , .
Abstract: Seabirds have a global distribution, are numerous throughout the world’s oceans, and have been used for decades to track and understand changes in the marine environment. They are dependent on a variety of ecosystems, including terrestrial, coastal, and pelagic, and are thus vulnerable to both marine and terrestrial environmental stressors. This chapter examines impacts on seabird populations that occur in the marine environment and are global in nature (touch more than one ocean basin). Both widespread (i.e., climate change induced alterations to marine food webs and sea level rise) and more point-source impacts (i.e., incidental bycatch in fisheries, hunting) are discussed. Additionally, natural occurrences in marine ecosystems (i.e., oceanographic regime shifts, parasites) and issues related to anthropogenic activities (i.e., plastic and oil pollution) are covered. Lastly, we discuss marine protected areas and other efforts aimed at conserving global seabird populations, including colony restoration, community-based research, and international conservation actions.
Keywords: Climate change Conservation Cumulative effects Disease Fisheries Hunting Marine protected areas Pollution Populations Seabirds
Programme: 333
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Giret A. (1996). The Antarctic Region: Geological Evolution and Processes. (Vol. 32). Bachelor's thesis, , .
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Joliet F. (2011). Umiujaq, regards inuit sur le paysage. Bachelor's thesis, Presses de l'UQAM, Montréal.
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Alexander Winterl, Sebastian Richter, Aymeric Houstin, Anna P. Nesterova, Francesco Bonadonna, Werner Schneider, Ben Fabry, Céline Le Bohec, Daniel P. Zitterbart. (2020). micrObs – A customizable time-lapse camera for ecological studies (Vol. 8).
Abstract: Camera traps for motion-triggered or continuous time-lapse recordings are readily available on the market. For demanding applications in ecology and environmental sciences, however, commercial systems often lack flexibility to freely adjust recording time intervals, suffer from mechanical component wear, and can be difficult to combine with auxiliary sensors such as GPS, weather stations, or light sensors. We present a robust time-lapse camera system that has been operating continuously since 2013 under the harsh climatic conditions of the Antarctic and Subantarctic regions. Thus far, we have recorded over one million images with individual cameras. The system consumes 122 mW of power in standby mode and captures up to 200,000 high-resolution (16 MPix) images without maintenance such as battery or image memory replacement. It offers time-lapse intervals between 2 s and 1 h, low-light or night-time power saving, and data logging capabilities for additional inputs such as GPS and weather data.
Keywords: Automated camera system Collective behavior Ecology Image processing Remote sensing Wildlife monitoring
Programme: 137
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Vincent Zvénigorosky, Sylvie Duchesne, Liubomira Romanova, Patrice Gérard, Christiane Petit, Michel Petit, Anatoly Alexeev, Olga Melnichuk, Angéla Gonzalez, Jean-Luc Fausser, Aisen Solovyev, Georgii Romanov, Nikolay Barashkov, Sardana Fedorova, Bertrand Ludes, Eric Crubézy, Christine Keyser. (2020). The genetic legacy of legendary and historical Siberian chieftains (Vol. 3). Bachelor's thesis, , .
Abstract: Seventeen years of archaeological and anthropological expeditions in North-Eastern Siberia (in the Sakha Republic, Yakutia) have permitted the genetic analysis of 150 ancient (15th-19th century) and 510 modern individuals. Almost all males were successfully analysed (Y-STR) and this allowed us to identify paternal lineages and their geographical expansion through time. This genetic data was confronted with mythological, historical and material evidence to establish the sequence of events that built the modern Yakut genetic diversity. We show that the ancient Yakuts recovered from this large collection of graves are not representative of an ancient population. Uncommonly, we were also able to demonstrate that the funerary preference observed here involved three specific male lineages, especially in the 18th century. Moreover, this dominance was likely caused by the Russian conquest of Siberia which allowed some male clans to rise to new levels of power. Finally, we give indications that some mythical and historical figures might have been the actors of those genetic changes. These results help us reconsider the genetic dynamics of colonization in some regions, question the distinction between fact and myth in national histories and provide a rare insight into a funerary ensemble by revealing the biased process of its composition.
Programme: 1038
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Gentile Francesco Ficetola, Jérôme Poulenard, Pierre Sabatier, Erwan Messager, Ludovic Gielly, Anouk Leloup, David Etienne, Jostein Bakke, Emmanuel Malet, Bernard Fanget, Eivind Støren, Jean-Louis Reyss, Pierre Taberlet, Fabien Arnaud. (2018). DNA from lake sediments reveals long-term ecosystem changes after a biological invasion (Vol. 4).
Abstract: What are the long-term consequences of invasive species? After invasion, how long do ecosystems require to reach a new equilibrium? Answering these questions requires long-term, high-resolution data that are vanishingly rare. We combined the analysis of environmental DNA extracted from a lake sediment core, coprophilous fungi, and sedimentological analyses to reconstruct 600 years of ecosystem dynamics on a sub-Antarctic island and to identify the impact of invasive rabbits. Plant communities remained stable from AD 1400 until the 1940s, when the DNA of invasive rabbits was detected in sediments. Rabbit detection corresponded to abrupt changes of plant communities, with a continuous decline of a dominant plant species. Furthermore, erosion rate abruptly increased with rabbit abundance. Rabbit impacts were very fast and were stronger than the effects of climate change during the 20th century. Lake sediments can allow an integrated temporal analysis of ecosystems, revealing the impact of invasive species over time and improving our understanding of underlying mechanisms. Rabbits have had a stronger impact on the landscape and plant communities of a remote island than one century of climate change. Rabbits have had a stronger impact on the landscape and plant communities of a remote island than one century of climate change.
Programme: 1094
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Benjamin Rey, Cyril Dégletagne, Claude Duchamp. (2016). Transcriptomic data analysis and differential gene expression of antioxidant pathways in king penguin juveniles (Aptenodytes patagonicus) before and after acclimatization to marine life (Vol. 9).
Abstract: In this article, we present differentially expressed gene profiles in the pectoralis muscle of wild juvenile king penguins that were either naturally acclimated to cold marine environment or experimentally immersed in cold water as compared with penguin juveniles that never experienced cold water immersion. Transcriptomic data were obtained by hybridizing penguins total cDNA on Affymetrix GeneChip Chicken Genome arrays and analyzed using maxRS algorithm, “Transcriptome analysis in non-model species: a new method for the analysis of heterologous hybridization on microarrays” (Dégletagne et al., 2010) [1]. We focused on genes involved in multiple antioxidant pathways. For better clarity, these differentially expressed genes were clustered into six functional groups according to their role in controlling redox homeostasis. The data are related to a comprehensive research study on the ontogeny of antioxidant functions in king penguins, “Hormetic response triggers multifaceted anti-oxidant strategies in immature king penguins (Aptenodytes patagonicus)” (Rey et al., 2016) [2]. The raw microarray dataset supporting the present analyses has been deposited at the Gene Expression Omnibus (GEO) repository under accessions GEO: GSE17725 and GEO: GSE82344.
Keywords: Antioxidant pathways Microarray Muscle Penguin
Programme: 131
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