Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie最新文献_第7页

Spatial and temporal co-structure analyses between ichthyofauna and environment: an example in the tropics 鱼类与环境的时空共结构分析:以热带地区为例

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-07-01 DOI: 10.1016/S0764-4469(01)01338-5

Laurence Blanc, Catherine Aliaume, Alfonso Zerbi, Gérard Lasserre

{"title":"Spatial and temporal co-structure analyses between ichthyofauna and environment: an example in the tropics","authors":"Laurence Blanc, Catherine Aliaume, Alfonso Zerbi, Gérard Lasserre","doi":"10.1016/S0764-4469(01)01338-5","DOIUrl":"10.1016/S0764-4469(01)01338-5","url":null,"abstract":"<div><p>Ichthyofauna distribution and habitat characteristics of <em>Thalassia</em> beds in the Grand Cul-de-Sac marin lagoon in Guadeloupe were studied during a one-year survey. Environmental variables (9) were measured monthly in ten sites along with collection of fish communities. The environmental data set, analysed alone through between–within group ‘principal component analysis’ (PCA), exhibited a significant spatial and temporal variability. The fish data set, however, presented only a significant spatial structure, stable over the year. Given the lack of temporal variability in fish distribution, a ‘between-site co-structure analysis’ (BSCA) was used to compare the faunistic and environmental structures in space. The co-inertia structure was reduced to one axis representing a strong coast-reef gradient, the major common phenomena to both data sets. Environment and fish distribution allowed to distinguish sites directly under mangrove influence (characterised by high seagrasses, high concentration of chlorophyll <em>a</em> and high densities of zooplankton), to sites under reef influence (with short but dense seagrasses, clear water, and poor nutriments). For that purposes, the BSCA summarised efficiently what in common the fauna spatial structure and the environment spatial structure may present.</p></div>","PeriodicalId":100306,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie","volume":"324 7","pages":"Pages 635-646"},"PeriodicalIF":0.0,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0764-4469(01)01338-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78382411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Les nuisances sonores dans la ville 城市中的噪音污染

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-07-01 DOI: 10.1016/S0764-4469(01)01333-6

Claude-Henri Chouard

引用次数: 11

Les appels d’urgence au Samu 紧急呼叫Samu

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-07-01 DOI: 10.1016/S0764-4469(01)01334-8

Geneviève Barrier

引用次数: 14

Répartition géographique des patronymes et structure génétique : le département de l’Ardèche au début du XXe siècle 姓氏的地理分布和遗传结构:20世纪初的ardeche部门

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-07-01 DOI: 10.1016/S0764-4469(01)01340-3

Michel Vernay

{"title":"Répartition géographique des patronymes et structure génétique : le département de l’Ardèche au début du XXe siècle","authors":"Michel Vernay","doi":"10.1016/S0764-4469(01)01340-3","DOIUrl":"10.1016/S0764-4469(01)01340-3","url":null,"abstract":"<div><p>The analysis of the geographical distribution of surnames (whose transmission in the European societies is similar to that of the Y chromosome) allows to study in an exhaustive way the spatial and temporal human population structure and the influence of environmental variations on this structure. The genetic structure of the Ardèche county was analysed through a study of the surname characteristics (diversity, frequency, geographical dispersion, etc.) of individuals born between 1891 and 1915. The estimation of the intra-community average consanguinity and the inter-district genetic relationships reveals a clear differentiation between populations of the mountainous part (geographically isolated, highly inbreeded) and those of the Rhône valley (less isolated, weakly inbreeded). As predicted by the isolation by distance model, inter-population coefficients of kinship decreases as distance increases, confirming the presence of a spatial structure, characterized by neighborhood exchange and resulting from former migratory flow.</p></div>","PeriodicalId":100306,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie","volume":"324 7","pages":"Pages 589-599"},"PeriodicalIF":0.0,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0764-4469(01)01340-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78542383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The nitration of proteins in platelets 硝化作用血小板中蛋白质的硝化作用

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-07-01 DOI: 10.1016/S0764-4469(01)01336-1

K.Richard Bruckdorfer

引用次数: 13

Le maintien de la mémoire cellulaire par les gènes du groupe Polycomb 多梳基因对细胞记忆的维持

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-07-01 DOI: 10.1016/S0764-4469(01)01329-4

Sophie Netter , Antoine Boivin

{"title":"Le maintien de la mémoire cellulaire par les gènes du groupe Polycomb","authors":"Sophie Netter , Antoine Boivin","doi":"10.1016/S0764-4469(01)01329-4","DOIUrl":"10.1016/S0764-4469(01)01329-4","url":null,"abstract":"<div><p>The <em>Polycomb</em>-group genes (PcG) encode a group of repressors well known for their function in stably maintaining the inactive expression patterns of key developmental regulators, including homeotic genes. PcG genes are structurally and functionally conserved in <em>Drosophila</em> and Mammalians, and some homologues have been found in worms, yeast and plants. Their products act through different complexes and at least one of these complexes seems to induce histone deacetylation. In <em>Drosophila</em>, building of PcG complexes depends on both protein–protein interactions and recognition near target genes of specific DNA sequences called <em>Polycomb</em>-group response element (PRE). Together with the counteracting trithorax-group proteins, PcG products establish a form of cellular memory by faithfully maintaining transcription states determined early in embryogenesis. Here, we discuss several aspects of PcG functions: the composition of the different complexes, the establishment and the transmission of silencing to subsequent cell generations as well as the subnuclear localisation of the PcG products.</p></div>","PeriodicalId":100306,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie","volume":"324 7","pages":"Pages 577-588"},"PeriodicalIF":0.0,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0764-4469(01)01329-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74289608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

La structure multicaule du genévrier thurifère : avantage adaptatif à un environnement sévère ? 刺柏的多茎结构:对恶劣环境的适应优势?

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-07-01 DOI: 10.1016/S0764-4469(01)01337-3

Valérie Bertaudière , Nicolas Montès , Wadï Badri , Thierry Gauquelin

{"title":"La structure multicaule du genévrier thurifère : avantage adaptatif à un environnement sévère ?","authors":"Valérie Bertaudière , Nicolas Montès , Wadï Badri , Thierry Gauquelin","doi":"10.1016/S0764-4469(01)01337-3","DOIUrl":"10.1016/S0764-4469(01)01337-3","url":null,"abstract":"<div><p>A comparative study of radial growth and biomass between multistemmed trees with variable number of stems and single-stemmed trees was carried out to better understand determinism and organisation of multicaulis structure of a juniper species (<em>Juniperus thurifera</em> L.) growing in high Mediterranean mountains (High Atlas, Morocco). It appears that all the stems of the same tree have similar ages and so simultaneous development. Their mean annual radial increments show significant differences because of probable competition for water and nutrient supply and obvious physical competition for space. The multistemmed trees characterized by low number of stems have the same mean annual radial growth as single-stemmed trees and more generally all multistemmed junipers have a higher biomass. The multicaulis structure of <em>Juniperus thurifera</em> thus could be considered as an adaptation to severe environment, characterized not only by hard topographical, edaphic and climatic conditions, but by strong human pressure too.</p></div>","PeriodicalId":100306,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie","volume":"324 7","pages":"Pages 627-634"},"PeriodicalIF":0.0,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0764-4469(01)01337-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78990561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Molecular and evolutionary analysis of a plant Y chromosome 植物Y染色体的分子和进化分析

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-06-01 DOI: 10.1016/S0764-4469(01)01322-1

Françoise Monéger

引用次数: 5

Goethe and the ABC model of flower development11 歌德与花卉发育的ABC模型

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-06-01 DOI: 10.1016/S0764-4469(01)01321-X

Enrico Coen

引用次数: 34

Future of early embryogenesis studies in Arabidopsis thaliana 拟南芥早期胚胎发生研究的未来

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie Pub Date : 2001-06-01 DOI: 10.1016/S0764-4469(01)01327-0

Patrick Gallois

引用次数: 7