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Author Sharma, K.; Degen, B.; Von Wuehlisch, G.; Singh, N.B.
Title Allozyme variation in eight natural populations of Pinus roxburghii Sarg. in India Type Journal Article
Year 2002 Publication Silvae Genetica Abbreviated Journal Silvae Genet.
Volume 51 Issue (down) 5-6 Pages 246-253
Keywords Allozymes; Differentiation; Genetic distance; Multilocus diversity; Pinus roxburghii; Variation; Enzymes; Forestry; Genes; Allozyme variations; Genetic engineering; Enzymes; Genes; Genetic Engineering; Pinus Roxburghii; Embryophyta; Pinus roxburghii
Abstract Seeds collected from eight populations of Chir pine (Pinus roxburghii SARG.) from the natural distribution range of the species in Himachal Himalayas in India were analysed isozymatically at 11 enzyme systems. For the enzyme systems studied, 25 gene loci were identified out of which 18 were polymorphic. The observed mean values for genetic variation were slightly lower than mean values reported for Pinus species (number of alleles: 1.65 compared to 2.36; effective number of alleles: 1.13 compared to 1.26; observed heterozygosity: 0.153 compared to 0.179). A small differentiation among populations and large variation within populations were reflected by small value of GST (0.04): Considering the different genetic parameters three populations seem favourable for gene conservation measures.
Address Silviculture Division, Forest Research Institute, Dehra Dun – 248 006, India
Corporate Author Thesis
Publisher Place of Publication Editor
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Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 00375349 (Issn) ISBN Medium
Area Expedition Conference
Notes Cited By (since 1996): 4; Export Date: 22 October 2011; Source: Scopus; Coden: Sigea; Language of Original Document: English; Correspondence Address: Sharma, K.; Dr. Y. S. Parmar Univ. Hort./Forest., Reg. Horticultural Research Station, Jachh (Nurpur)-176 201 (HP), India Approved no
Call Number EcoFoG @ webmaster @ Serial 360
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Author Vantaux, A.; Roux, O.; Magro, A.; Ghomsi, N.T.; Gordon, R.D.; Dejean, A.; Orivel, J.
Title Host-Specific Myrmecophily and Myrmecophagy in the Tropical Coccinellid Diomus thoracicus in French Guiana Type Journal Article
Year 2010 Publication Biotropica Abbreviated Journal Biotropica
Volume 42 Issue (down) 5 Pages 622-629
Keywords ants; ladybird; mimicry; parasite; Wasmannia auropunctata
Abstract A variety of arthropods, particularly insects, have developed myrmecophilous interactions with ants to gain access to resources and/or for protection. Among these myrmecophiles, only a few examples have been documented in the Coccinellidae, most of them involving species able to feed on ant-tended Hemiptera. We report here a new case of obligate myrmecophily in the coccinellid Diomus thoracicus. Larvae are invariably and exclusively found in the nests of the ant Wasmannia auropunctata and seem to rely on ant brood as their only food source. Not only do ant workers show no aggressiveness toward the D. thoracicus larvae in their behavioral interactions at the colonial level, but also at the species level; while coccinellid adults are always attacked. The integration of the larvae inside of the ant nests is based on their chemical mimicry of the host's cuticular cues. Therefore, given the presence of the D. thoracicus larvae inside of the ant's nest, their predation on Wasmannia brood and their chemical mimicry, this species can be considered a specific parasite of W. auropunctata. Overall, this new case of myrmecophily not only specifically involves a highly invasive ant species, but also provides insights into the evolution of myrmecophily and myrmecophagy in coccinellids.
Address [Vantaux, Amelie; Magro, Alexandra; Orivel, Jerome] Univ Toulouse, UPS, EDB Lab Evolut & Diversite Biol, F-31062 Toulouse, France, Email: orivel@cict.fr
Corporate Author Thesis
Publisher WILEY-BLACKWELL PUBLISHING, INC Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0006-3606 ISBN Medium
Area Expedition Conference
Notes ISI:000281707700025 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 27
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Author Zhang, T.; Bai, S.L.; Zhang, Y.F.; Thibaut, B.
Title Viscoelastic properties of wood materials characterized by nanoindentation experiments Type Journal Article
Year 2012 Publication Wood Science and Technology Abbreviated Journal Wood Sci. Technol.
Volume 46 Issue (down) 5 Pages 1003-1016
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Springer-Verlag Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0043-7719 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number EcoFoG @ webmaster @ Serial 465
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Author Roux, O.; Le Lann, C.; van Alphen, J.J.M.; van Baaren, J.
Title How does heat shock affect the life history traits of adults and progeny of the aphid parasitoid Aphidius avenae (Hymenoptera: Aphidiidae)? Type Journal Article
Year 2010 Publication Bulletin of Entomological Research Abbreviated Journal Bull. Entomol. Res.
Volume 100 Issue (down) 5 Pages 543-549
Keywords developmental rate; fecundity; heat stress; longevity; sex-specific effect; parasitic wasp
Abstract Because insects are ectotherms, their physiology, behaviour and fitness are influenced by the ambient temperature. Any changes in environmental temperatures may impact the fitness and life history traits of insects and, thus, affect population dynamics. Here, we experimentally tested the impact of heat shock on the fitness and life history traits of adults of the aphid parasitoid Aphidius avenae and on the later repercussions for their progeny. Our results show that short exposure (1h) to an elevated temperature (36 degrees C), which is frequently experienced by parasitoids during the summer, resulted in high mortality rates in a parasitoid population and strongly affected the fitness of survivors by drastically reducing reproductive output and triggering a sex-dependent effect on lifespan. Heat stress resulted in greater longevity in surviving females and in shorter longevity in surviving males in comparison with untreated individuals. Viability and the developmental rates of progeny were also affected in a sex-dependent manner. These results underline the ecological importance of the thermal stress response of parasitoid species, not only for survival, but also for maintaining reproductive activities.
Address [Roux, O.] Univ Toulouse 3, Lab Ecol Fonct, UMR 5245 CNRS UPS INPT, F-31062 Toulouse 04, France, Email: oroux@cict.fr
Corporate Author Thesis
Publisher CAMBRIDGE UNIV PRESS Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0007-4853 ISBN Medium
Area Expedition Conference
Notes ISI:000282077700005 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 42
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Author Marcon, E.; Puech, F.
Title Measures of the geographic concentration of industries: improving distance-based methods Type Journal Article
Year 2010 Publication Journal of Economic Geography Abbreviated Journal J. Econ. Geogr.
Volume 10 Issue (down) 5 Pages 745-762
Keywords Geographic concentration; distance-based methods; K-density function; Ripley's K function; M function; C40; C60; R12; L60
Abstract We discuss a property of distance-based measures that has not been addressed with regard to evaluating the geographic concentration of economic activities. The article focuses on the choice between a probability density function of point-pair distances or a cumulative function. We begin by introducing a new cumulative function, M, for evaluating the relative geographic concentration and the co-location of industries in a non-homogeneous spatial framework. Secondly, some rigorous comparisons are made with the leading probability density function of Duranton and Overman (2005), Kd. The merits of the simultaneous use of Kd and M is proved, underlining the complementary nature of the results they provide.
Address [Marcon, Eric] AgroParisTech ENGREF, UMR EcoFoG, Kourou 97310, French Guiana, Email: Florence.Puech@univ-lyon2.fr
Corporate Author Thesis
Publisher OXFORD UNIV PRESS Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1468-2702 ISBN Medium
Area Expedition Conference
Notes ISI:000281183300009 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 43
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Author Quesada, C.A.; Lloyd, J.; Schwarz, M.; Patino, S.; Baker, T.R.; Czimczik, C.; Fyllas, N.M.; Martinelli, L.; Nardoto, G.B.; Schmerler, J.; Santos, A.J.B.; Hodnett, M.G.; Herrera, R.; Luizao, F.J.; Arneth, A.; Lloyd, G.; Dezzeo, N.; Hilke, I.; Kuhlmann, I.; Raessler, M.; Brand, W.A.; Geilmann, H.; Moraes, J.O.; Carvalho, F.P.; Araujo, R.N.; Chaves, J.E.; Cruz, O.F.; Pimentel, T.P.; Paiva, R.
Title Variations in chemical and physical properties of Amazon forest soils in relation to their genesis Type Journal Article
Year 2010 Publication Biogeosciences Abbreviated Journal Biogeosciences
Volume 7 Issue (down) 5 Pages 1515-1541
Keywords
Abstract Soil samples were collected in six South American countries in a total of 71 different 1 ha forest plots across the Amazon Basin as part of the RAINFOR project. They were analysed for total and exchangeable cations, C, N, pH with various P fractions also determined. Physical properties were also examined and an index of soil physical quality proposed. A diverse range of soils was found. For the western areas near the Andean cordillera and the southern and northern fringes, soils tend to be distributed among the lower pedogenetic levels, while the central and eastern areas of Amazonia have more intensely weathered soils. This gives rise to a large variation of soil chemical and physical properties across the Basin, with soil properties varying predictably along a gradient of pedogenic development. Nutrient pools generally increased slightly in concentration from the youngest to the intermediate aged soils after which a gradual decline was observed with the lowest values found in the most weathered soils. Soil physical properties were strongly correlated with soil fertility, with favourable physical properties occurring in highly weathered and nutrient depleted soils and with the least weathered, more fertile soils having higher incidence of limiting physical properties. Soil phosphorus concentrations varied markedly in accordance with weathering extent and appear to exert an important influence on the nitrogen cycle of Amazon forest soils.
Address [Quesada, C. A.; Lloyd, J.; Baker, T. R.; Fyllas, N. M.] Univ Leeds, Sch Geog, Earth & Biosphere Inst, Leeds LS2 9JT, W Yorkshire, England, Email: betoquesada@yahoo.com.br
Corporate Author Thesis
Publisher COPERNICUS GESELLSCHAFT MBH Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1726-4170 ISBN Medium
Area Expedition Conference
Notes ISI:000278184500011 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 58
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Author Cereghino, R.; Leroy, C.; Dejean, A.; Corbara, B.
Title Ants mediate the structure of phytotelm communities in an ant-garden bromeliad Type Journal Article
Year 2010 Publication Ecology Abbreviated Journal Ecology
Volume 91 Issue (down) 5 Pages 1549-1556
Keywords Aechmea mertensii; ant-gardens; biodiversity; bromeliads; Camponotus femoratus; Crematogaster levior; macroinvertebrates; mutualism; Pachycondyla goeldii; phytotelmata; secondary forest; Sinnamary; French Guiana; species interactions
Abstract The main theories explaining the biological diversity of rain forests often confer a limited understanding of the contribution of interspecific interactions to the observed patterns. We show how two-species mutualisms can affect much larger segments of the invertebrate community in tropical rain forests. Aechmea mertensii (Bromeliaceae) is both a phytotelm (plant-held water) and an ant-garden epiphyte. We studied the influence of its. associated ant species (Pachycondyla goeldii and Camponotus femoratus) on the physical characteristics of the plants, and, subsequently, on the diversity of the invertebrate communities that inhabit their tanks. As dispersal agents for the bromeliads, P. goeldii and C. femoratus influence the shape and size of the bromeliad by determining the location of the seedling, from exposed to partially shaded areas. By coexisting on a local scale, the two ant species generate a gradient of habitat conditions in terms of available resources (space and food) for aquatic invertebrates, the diversity of the invertebrate communities increasing with greater volumes of water and fine detritus. Two-species mutualisms are widespread in nature, but their influence on the diversity of entire communities remains largely unexplored. Because macroinvertebrates constitute an important part of animal production in all ecosystem types, further investigations should address the functional implications of such indirect effects.
Address [Cereghino, Regis] Univ Toulouse, UPS, INPT, Lab Ecol Fonct,EcoLab, F-31062 Toulouse, France, Email: cereghin@cict.fr
Corporate Author Thesis
Publisher ECOLOGICAL SOC AMER Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0012-9658 ISBN Medium
Area Expedition Conference
Notes ISI:000277867600030 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 59
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Author Derory, J.; Scotti-Saintagne, C.; Bertocchi, E.; Le Dantec, L.; Graignic, N.; Jauffres, A.; Casasoli, M.; Chancerel, E.; Bodenes, C.; Alberto, F.; Kremer, A.
Title Contrasting relationships between the diversity of candidate genes and variation of bud burst in natural and segregating populations of European oaks Type Journal Article
Year 2010 Publication Heredity Abbreviated Journal Heredity
Volume 104 Issue (down) 5 Pages 438-448
Keywords nucleotide diversity; candidate gene; QTL; Qeurcus petraea
Abstract Nucleotide diversity was assessed within nine candidate genes (CGs) (in total 4.6 kb) for the time of bud burst in nine sessile oak (Quercus petraea) populations distributed in central and northern Europe. The sampled populations were selected on the basis of their contrasting times of bud burst observed in common garden experiments (provenance tests). The CGs were selected according to their expression profiles during the transition from quiescent to developing buds and/or their functional role in model plants. The overall nucleotide diversity was large (pi(tot) = 6.15 x 10(-3); pi(silent) = 11.2 x 10(-3)), but population differentiation was not larger than for microsatellites. No outlier single-nucleotide polymorphism (SNP) departing from neutral expectation was found among the total of 125 SNPs. These results contrasted markedly with the significant associations that were observed between the CGs and bud burst in segregating populations. Quantitative trait loci (QTLs) for bud burst were identified for 13 year*site seasonal observations in a cloned mapping pedigree. Nineteen QTLs were detected, and QTLs located on linkage groups 2, 5 and 9 contributed repeatedly to more than 12% of the phenotypic variation of the trait. Eight genes were polymorphic in the two parents of the pedigree and could be mapped on the existing genetic map. Five of them located within the confidence intervals of QTLs for bud burst. Interestingly, four of them located within the three QTLs exhibiting the largest contributions to bud burst. Heredity (2010) 104, 438-448; doi:10.1038/hdy.2009.134; published online 7 October 2009
Address [Derory, J.; Scotti-Saintagne, C.; Bertocchi, E.; Graignic, N.; Jauffres, A.; Casasoli, M.; Chancerel, E.; Bodenes, C.; Alberto, F.; Kremer, A.] INRA, BIOGECO UMR1202, F-33610 Cestas, France, Email: antoine.kremer@pierroton.inra.fr
Corporate Author Thesis
Publisher NATURE PUBLISHING GROUP Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0018-067X ISBN Medium
Area Expedition Conference
Notes ISI:000276952000005 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 60
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Author Corbara, B.; Carpenter, J.M.; Cereghino, R.; Leponce, M.; Gibernau, M.; Dejean, A.
Title Diversity and nest site selection of social wasps along Guianese forest edges: assessing the influence of arboreal ants Type Journal Article
Year 2009 Publication Comptes Rendus Biologies Abbreviated Journal C. R. Biol.
Volume 332 Issue (down) 5 Pages 470-479
Keywords Polistinae; Diversity; Nest site selection; Ant-wasp-plant interactions; French Guiana
Abstract monitored), and estimate that we recorded up to 73% of the local social wasp fauna. This baseline study was complemented by a long-term survey of the same area and the examination of isolated trees (permitting us to record two additional species, resulting in a total of 63 wasp species). Our results form a continuum from species avoiding nesting on any plant (6.5% of the wasp species) to species nesting on plants but avoiding those sheltering ant nests (82%), to, finally, wasps nesting in association with arboreal ants known to divert army ant raids (11.5%). Consequently, this study documents that most wasp species select plants possibly repulsive to arboreal ants, while associations with arboreal ants, although confirmed here, have been overrepresented in the literature. To cite this article: B. Corbara et al., C. R. Biologies 332 (2009). (C) 2009 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Address [Dejean, Alain] CNRS Guyane, UPS 2561, F-97300 Cayenne, France, Email: bruno.corbara@univ-bpclermont.fr
Corporate Author Thesis
Publisher ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1631-0691 ISBN Medium
Area Expedition Conference
Notes ISI:000266021400007 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 113
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Author Malhi, Y.; Aragao, L.E.O.C.; Metcalfe, D.B.; Paiva, R.; Quesada, C.A.; Almeida, S.; Anderson, L.; Brando, P.; Chambers, J.Q.; da Costa, A.C.L.; Hutyra, L.R.; Oliveira, P.; Patino, S.; Pyle, E.H.; Robertson, A.L.; Teixeira, L.M.
Title Comprehensive assessment of carbon productivity, allocation and storage in three Amazonian forests Type Journal Article
Year 2009 Publication Global Change Biology Abbreviated Journal Glob. Change Biol.
Volume 15 Issue (down) 5 Pages 1255-1274
Keywords allocation; Amazonia; carbon; growth; litterfall; productivity; respiration; roots; soil; tropical forest
Abstract The allocation and cycling of carbon (C) within forests is an important component of the biospheric C cycle, but is particularly understudied within tropical forests. We synthesise reported and unpublished results from three lowland rainforest sites in Amazonia (in the regions of Manaus, Tapajos and Caxiuana), all major sites of the Large-Scale Biosphere-Atmosphere Programme (LBA). We attempt a comprehensive synthesis of the C stocks, nutrient status and, particularly, the allocation and internal C dynamics of all three sites. The calculated net primary productivities (NPP) are 10.1 +/- 1.4 Mg C ha(-1) yr(-1) (Manaus), 14.4 +/- 1.3 Mg C ha(-1) yr(-1) (Tapajos) and 10.0 +/- 1.2 Mg C ha(-1) yr(-1) (Caxiuana). All errors bars report standard errors. Soil and leaf nutrient analyses indicate that Tapajos has significantly more plant-available phosphorus and calcium. Autotrophic respiration at all three sites (14.9-21.4 Mg C ha yr(-1)) is more challenging to measure, with the largest component and greatest source of uncertainty being leaf dark respiration. Comparison of measured soil respiration with that predicted from C cycling measurements provides an independent constraint. It shows general good agreement at all three sites, with perhaps some evidence for measured soil respiration being less than expected. Twenty to thirty percent of fixed C is allocated belowground. Comparison of gross primary productivity (GPP), derived from ecosystem flux measurements with that derived from component studies (NPP plus autotrophic respiration) provides an additional crosscheck. The two approaches are in good agreement, giving increased confidence in both approaches to estimating GPP. The ecosystem carbon-use efficiency (CUEs), the ratio of NPP to GPP, is similar at Manaus (0.34 +/- 0.10) and Caxiuana (0.32 +/- 0.07), but may be higher at Tapajos (0.49 +/- 0.16), although the difference is not significant. Old growth or infertile tropical forests may have low CUE compared with recently disturbed and/or fertile forests.
Address [Malhi, Yadvinder; Aragao, Luiz Eduardo O. C.; Metcalfe, Daniel B.; Anderson, Liana] Sch Geog & Environm, Environm Change Inst, Oxford OX1 3QY, England, Email: yadvinder.malhi@ouce.ox.ac.uk
Corporate Author Thesis
Publisher WILEY-BLACKWELL PUBLISHING, INC Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1354-1013 ISBN Medium
Area Expedition Conference
Notes ISI:000265033700015 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 117
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