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L. Testut, A.s. Unnikrishnan. (2015). Improving Modeling of Tides on the Continental Shelf off the West Coast of India.
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L. Testut, A. S. Unnikrishnan. (2015). Improving Modeling of Tides on the Continental Shelf off the West Coast of India (Vol. 32).
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. (2019). Biological Invasion Theories: Merging Perspectives from Population, Community and Ecosystem Scales.
Abstract: Biological invasions have reached an unprecedented level and the number of introduced species is still increasing worldwide. Despite major advances in invasion science, the determinants of success of introduced species, the magnitude and dimensions of their impact, and the mechanisms sustaining successful invasions are still debated. Empirical studies show divergent impacts of non-native populations on ecosystems and contrasting effects of biotic and abiotic factors on the dynamics of non-native populations; this is hindering the emergence of a unified theory of biological invasions. We propose a synthesis that merges perspectives from population, community, and ecosystem levels. Along a timeline of ecosystem transformation driven by non-native species, from historical to human-modified ecosystems, we order invasion concepts and theories to clarify their chaining and relevance during each step of the invasion process. This temporal sorting of invasion concepts shows that each concept is relevant at a specific stage of the invasion. Concepts and empirical findings on non-native species may appear contradictory. However, we suggest that, when mapped onto an invasion timeline, they may be combined in a complementary way. An overall scheme is proposed to summarise the theoretical dynamics of ecosystems subjected to invasions. For any given case study, this framework provides a guide through the maze of theories and should help choose the appropriate concepts according to the stage of invasion.
Programme: 136
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Hochstrasser-Petit Ch., Romanova L., Duchesne S., Melnichuk O., Gérard P. (2020). Yakut clothes of the 17th and 18th centuries, archaeology and restitution. (Vol. 4).
Abstract: 40 Frozen Yakutian Graves, From The 17th To The 19th Century Allow The Reconstitution Of Clothes. At The End Of the 17th Century, New Fashions Are Emerging With The Ostentatious Use Of Imported Goods And The Influences Of russian Noble Circles And Chinese And/or Mongol And/or Buriat Fashions. The Garment Does Not Only Seem To Be any More An Element Of Protection Against The Cold And A Utilitarian Object But Becomes A Way To Marking The Socialization of The Individual.
Programme: 1038
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. (2020). Frozen graves of Yakutia, a chronological sequence (Vol. 4).
Abstract: Distribution, cultural and chronological attribution of frozen graves of Yakutia between the beginning of 17th and end of 19th century. The funerary rites and the artefacts allow to differentiate four chrono-cultural periods (before 1700 AD, from 1700 to 1750 AD, from 1750 to 1800 AD and after 1800 AD) which could be associated with historical events: opening of the trading post of Nertchinsk, expansion of the Kangalasky clan, economic collapse, generalization of Christianization.
Keywords: artefacts Christianization chronology funeral practices modern period soil burial Yakutia Yakuts
Programme: 1038
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. (2014). When things go wrong: intra-season dynamics of breeding failure in a seabird
. Ecosphere, 5(1), art4–.
Abstract: During breeding, long-lived species face important time and energy constraints that can lead to breeding failure when food becomes scarce. Despite the potential implications of intra-season dynamics in breeding failure for individual behavior, carry-over effects, dispersal decisions and population dynamics, little information is currently available on these dynamics at fine temporal scales. Here, we monitored the foraging behavior and the proportion of successful black-legged kittiwake pairs from nest construction to chick fledging in a colony of the southern Barents Sea, to relate foraging effort to the dynamics of breeding failure over an entire breeding season, and to infer the environmental conditions leading to this failure. Specifically, we tracked kittiwakes with GPS and satellite tags during incubation and early chick-rearing to document nest attendance, foraging range, time budgets and daily energy expenditures (DEE). We also monitored diet changes over time. We predicted that breeding failure would follow a non-linear trend characterized by a break point after which breeding success would drop abruptly and would be related to a substantial increase in foraging effort. Kittiwakes showed contrasting foraging patterns between incubation and chick-rearing: they extended their foraging range from 20 km during incubation to more than 450 km during chick-rearing and switched diet. They also increased their DEE and readjusted their time budgets by increasing time spent at sea. These changes corresponded to a break point in breeding dynamics beyond which the proportion of successful pairs abruptly dropped. At the end of the season, less than 10% of kittiwake pairs raised chicks in the monitored plots. This integrative study confirms that breeding failure is a non-linear process characterized by a threshold beyond which individuals face an energetic trade-off and cannot simultaneously sustain high reproductive and self-maintenance efforts. In this way, the occurrence of sudden environmental changes complicates our ability to predict population dynamics and poses conservation challenges.
Programme: 333
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. (2016). Variation in the age of first reproduction: different strategies or individual quality? (Vol. 97).
Abstract: Abstract Although age at first reproduction is a key demographic parameter that is probably under high selective pressure, it is highly variable and the cause of this variability is not well understood. Two non?exclusive hypotheses may explain such variability. It could be the expression of different individual strategies, i.e., different allocation strategies in fitness components, or the consequences of individual difference in intrinsic quality, i.e., some individuals always doing better than others in all fitness components. We tested these hypotheses in the Wandering Albatross investigating relationships between the age at first reproduction and subsequent adult demographic traits. Using finite mixture capture recapture modeling, we demonstrate that the age at first reproduction is negatively related to both reproductive performances and adult survival, suggesting that individual quality was an important factor explaining variation in the age at first reproduction. Our results suggest that age at first breeding is a good predictor of quality in this long?lived seabird species.
Programme: 109
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. (2015). Extreme climate events and individual heterogeneity shape life-history traits and population dynamics
. Ecological Monographs, 85(4), 605–624.
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. (2014). Age, sex, and breeding status shape a complex foraging pattern in an extremely long-lived seabird
. Ecology, 95(8), 2324–2333.
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Goutte A, Bustamante P, Barbraud C, Delord K, Weimerskirch H, Chastel O, . (2013). Demographic responses to mercury exposure in two closely related Antarctic top predators
. Ecology, 95(4), 1075–1086.
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