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Author |
L. Testut, A.s. Unnikrishnan |
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Title |
Improving Modeling of Tides on the Continental Shelf off the West Coast of India |
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Journal |
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Year |
2015 |
Publication |
Journal of Coastal Research |
Abbreviated Journal |
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Pages |
105-115 |
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Abstract |
Testut, L. and Unnikrishnan, A.S., 2016. Improving modeling of tides on the continental shelf off the west coast of India. Global tidal solutions are sometimes inaccurate in coastal regions. This is particularly true in some regions of the northern Indian Ocean, which are characterized by wide continental shelves and large tidal ranges. We show that these global solutions are inaccurate on the shelf region off Mumbai, off the west coast of India. In this region, the shelf is very wide, and it opens into the Gulf of Khambhat, where large tides are observed. Moreover, in regions of large semidiurnal tides in the Bay of Bengal, such as the head Bay, Gulf of Martaban, etc., global tidal solutions are not accurate. In the present work, we focus on the shelf region off the west coast of India. We used a new approach in developing a high-resolution hydrodynamic tidal model for the inner shelf region (8°N to 22°N). The open boundary of the model is aligned to the altimetry tracks, which allowed us to prescribe boundary conditions obtained directly from observations. We show that the tidal solutions at the coast are much improved compared with those obtained from the global solutions and that on the wide shelf portion and the Gulf of Khambhat the improvement has been considerable. |
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0749-0208 |
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0749-0208 |
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yes |
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6848 |
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Author |
L. Testut, A. S. Unnikrishnan |
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Title |
Improving Modeling of Tides on the Continental Shelf off the West Coast of India |
Type |
Journal |
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Year |
2015 |
Publication |
Journal of Coastal Research (JCR) |
Abbreviated Journal |
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Volume |
32 |
Issue |
1 |
Pages |
105-115 |
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Abstract |
Testut, L. and Unnikrishnan, A.S., 2016. Improving modeling of tides on the continental shelf off the west coast of India. Global tidal solutions are sometimes inaccurate in coastal regions. This is particularly true in some regions of the northern Indian Ocean, which are characterized by wide continental shelves and large tidal ranges. We show that these global solutions are inaccurate on the shelf region off Mumbai, off the west coast of India. In this region, the shelf is very wide, and it opens into the Gulf of Khambhat, where large tides are observed. Moreover, in regions of large semidiurnal tides in the Bay of Bengal, such as the head Bay, Gulf of Martaban, etc., global tidal solutions are not accurate. In the present work, we focus on the shelf region off the west coast of India. We used a new approach in developing a high-resolution hydrodynamic tidal model for the inner shelf region (8°N to 22°N). The open boundary of the model is aligned to the altimetry tracks, which allowed us to prescribe boundary conditions obtained directly from observations. We show that the tidal solutions at the coast are much improved compared with those obtained from the global solutions and that on the wide shelf portion and the Gulf of Khambhat the improvement has been considerable. |
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688 |
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0749-0208, 1551-5036 |
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0749-0208, 1551-5036 |
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yes |
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7068 |
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Author |
Olivier Chabrerie, François Massol, Benoit Facon, Romain Thevenoux, Manon Hess, Romain Ulmer, Jelena H. Pantel, Julie Braschi, Laurent Amsellem, Sylvie Baltora-Rosset, Aurélie Tasiemski, Frédéric Grandjean, Patricia Gibert, Matthieu Chauvat, Laurence Affre, Gabrielle Thiébaut, Frédérique Viard, Estelle Forey, Laurent Folcher, Thomas Boivin, Elise Buisson, David M. Richardson, David Renault |
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Title |
Biological Invasion Theories: Merging Perspectives from Population, Community and Ecosystem Scales |
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Journal |
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Year |
2019 |
Publication |
Preprints |
Abbreviated Journal |
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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. |
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136 |
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yes |
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Serial |
7948 |
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Author |
Hochstrasser-Petit Ch., Romanova L., Duchesne S., Melnichuk O., Gérard P. |
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Title |
Yakut clothes of the 17th and 18th centuries, archaeology and restitution. |
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Journal |
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Year |
2020 |
Publication |
Vest. archeol. anthropol. i etnogr |
Abbreviated Journal |
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Volume |
4 |
Issue |
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Pages |
131-147 |
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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. |
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1038 |
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yes |
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Call Number |
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Serial |
8058 |
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Author |
Sylvie Duchesne, R Bravina, V POPOV, S Kolodeznikov, P Gérard, V Myglan, Ch Hochstrasser-Petit, L Romanova, M Petit, N Kirianov, A Alexeev, L Alekseeva, A Riberon, E Crubézy |
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Title |
Frozen graves of Yakutia, a chronological sequence |
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Journal |
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Year |
2020 |
Publication |
VESTNIK ARHEOLOGII, ANTROPOLOGII I ETNOGRAFII |
Abbreviated Journal |
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Volume |
4 |
Issue |
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Pages |
120-130 |
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Keywords |
artefacts Christianization chronology funeral practices modern period soil burial Yakutia Yakuts |
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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. |
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1038 |
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yes |
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Call Number |
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Serial |
8012 |
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Author |
Ponchon A, Grémillet D, Christensen-Dalsgaard S, Erikstad K E, Barrett R T, Reiertsen T K, McCoy K D, Tveraa T, Boulinier T, |
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Title |
When things go wrong: intra-season dynamics of breeding failure in a seabird
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Journal Article |
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Year |
2014 |
Publication |
Ecosphere |
Abbreviated Journal |
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Volume |
5 |
Issue |
1 |
Pages |
art4- |
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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. |
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333 |
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Ecological Society of America |
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ISSN |
2150-8925 |
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yes |
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4952 |
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Author |
Fay Rémi, Barbraud Christophe, Delord Karine, Weimerskirch Henri |
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Title |
Variation in the age of first reproduction: different strategies or individual quality? |
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Journal |
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Year |
2016 |
Publication |
Ecology |
Abbreviated Journal |
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Volume |
97 |
Issue |
7 |
Pages |
1842-1851 |
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Keywords |
capture–mark–recapture individual heterogeneity life‐history plasticity reaction norm trade‐off Wandering Albatross |
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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. |
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0012-9658 |
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0012-9658 |
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yes |
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6603 |
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Author |
Jenouvrier Stéphanie, Péron Clara, Weimerskirch Henri, |
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Title |
Extreme climate events and individual heterogeneity shape life-history traits and population dynamics
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Type |
Journal Article |
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Year |
2015 |
Publication |
Ecological Monographs |
Abbreviated Journal |
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Volume |
85 |
Issue |
4 |
Pages |
605-624 |
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109 |
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0012-9615 |
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yes |
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6185 |
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Author |
Jaeger Audrey, Goutte Aurélie, Lecomte Vincent J, Richard Pierre, Chastel Olivier, Barbraud Christophe, Weimerskirch Henri, Cherel Yves, |
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Title |
Age, sex, and breeding status shape a complex foraging pattern in an extremely long-lived seabird
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Type |
Journal Article |
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Year |
2014 |
Publication |
Ecology |
Abbreviated Journal |
Ecology |
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Volume |
95 |
Issue |
8 |
Pages |
2324-2333 |
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109 |
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Ecological Society of America |
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0012-9658 |
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yes |
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5067 |
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Author |
Goutte A, Bustamante P, Barbraud C, Delord K, Weimerskirch H, Chastel O, |
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Title |
Demographic responses to mercury exposure in two closely related Antarctic top predators
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Journal Article |
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Year |
2013 |
Publication |
Ecology |
Abbreviated Journal |
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Volume |
95 |
Issue |
4 |
Pages |
1075-1086 |
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Abstract |
Although toxic chemicals constitute a major threat for wildlife, their effects have been mainly assessed at the individual level and under laboratory conditions. Predicting population-level responses to pollutants in natural conditions is a major and ultimate task in ecological and ecotoxicological research. The present study aims to estimate the effect of mercury (Hg) levels on future apparent survival rates and breeding performances. We used a long-term data set (?10 years) and recently developed methodological tools on two closely related Antarctic top predators, the South Polar Skua Catharacta maccormicki from Adélie Land and the Brown Skua C. lonnbergi from the Kerguelen Archipelago. Adult survival rates and breeding probabilities were not affected by Hg levels, but breeding success in the following year decreased with increasing Hg levels. Although South Polar Skuas exhibited much lower Hg levels than Brown Skuas, they suffered from higher Hg-induced breeding failure. This species difference could be attributed to an interaction between Hg and other environmental perturbations, including climate change and a complex cocktail of pollutants. By including Hg-dependent demographic parameters in population models, we showed a weak population decline in response to increasing Hg levels. This demographic decline was more pronounced in South Polar Skuas than in Brown Skuas. Hence, Hg exposure differently affects closely related species. The wide range of environmental perturbations in Antarctic regions could exacerbate the demographic responses to Hg levels. In that respect, we urge future population modeling to take into account the coupled effects of climate change and anthropogenic pollution to estimate population projections. |
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109 |
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Ecological Society of America |
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0012-9658 |
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yes |
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5051 |
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