| Records |
| Author |
Sierra, J.; Daudin, D.; Domenach, A.M.; Nygren, P.; Desfontaines, L. |
| Title |
Nitrogen transfer from a legume tree to the associated grass estimated by the isotopic signature of tree root exudates: A comparison of the N-15 leaf feeding and natural N-15 abundance methods |
Type |
Journal Article |
| Year |
2007 |
Publication |
European Journal of Agronomy |
Abbreviated Journal |
Eur. J. Agron. |
| Volume |
27 |
Issue |
2-4 |
Pages |
178-186 |
| Keywords |
agroforestry; box model; gliricidia sepium; N-15 fractionation; root turnover; tree pruning |
Abstract  |
Nitrogen (N) transfer from legume trees to associated crops is a key factor for the N economy of low-input agroforestry systems. In this work, we presented a new approach to estimate N transfer based on the N-15 content of root exudates and N released by root turnover of the donor plant (Gliricidia sepium) and the temporal change of the N-15 content of the receiver plant (Dichanthium aristatum). The study was carried out in greenhouse using two isotopic methods: N-15 leaf feeding (LF) and the natural N-15 abundance (NA). Measurements of exudate N-15 were made at several dates before and after tree pruning. A time-dependent box model was devised to quantify N transfer in time and to make comparisons between the isotopic methods. In NA, although tree roots and exudates presented a similar N-15 signature before tree pruning, exudates were strongly depleted in N-15 after pruning. In LF, exudates were always depleted in N-15 in relation to tree roots. Hence, the current assumption used in N transfer studies concerning the equal N-15/N-14 distribution in tissues of the donor plant and in its excreted N was not confirmed in our study. Before pruning, N transfer functioned as a two-N-source system (soil N and exudates N) and both isotopic methods provided similar estimates: 11-12% for LF and 10-15% for NA. Calculations per-formed with the model indicated that N transfer occurred with small or nil fractionation of N-15 in exudates. After pruning, there was a third N source associated with N released from tree root turnover. During this period, the isotopic signature of the receiver plant showed a transient state due to the progressive decrease of N-15 content of that N source. The amount of N derived from the tree represented 65% of the total N content of the. grass at the end of the experiments. (c) 2007 Elsevier B.V. All rights reserved. |
| Address |
INRA, Unite Agropedioclimat, UR135, Petit Bourg 97170, Guadeloupe, Email: jorge.sierra@antilles.inra.fr |
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Thesis |
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| Publisher |
ELSEVIER SCIENCE BV |
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Original Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
1161-0301 |
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| Notes |
ISI:000249798900003 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
157 |
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| Author |
Koponen, P.; Nygren, P.; Domenach, A.M.; Le Roux, C.; Saur, E.; Roggy, J.C. |
| Title |
Nodulation and dinitrogen fixation of legume trees in a tropical freshwater swamp forest in French Guiana |
Type |
Journal Article |
| Year |
2003 |
Publication |
Journal of Tropical Ecology |
Abbreviated Journal |
J. Trop. Ecol. |
| Volume |
19 |
Issue |
|
Pages |
655-666 |
| Keywords |
acetylene reduction assay; Bradyrhizobium; flooding; microtopography; N-15 natural abundance method; 16S rDNA sequencing |
| Abstract |
Nodulated legume trees comprised 43% of the stand basal area in the low, most frequently flooded microsites, and 23% in higher, drier microsites in a tropical freshwater swamp forest in French Guiana. Dinitrogen fixation in Pterocarpus officinalis, Hydrochorea corymbosa and Inga pilosula was confirmed by acetylene reduction assay (ARA), presence of leghaemoglobin in nodules and the N-15 natural abundance method. The results for Zygia cataractae were inconclusive but suggested N-2 fixation in drier microsites. Nodulated Inga disticha had a N-15-to-N-14 ratio similar to non-N-2-fixing trees, but ARA indicated nitrogenase activity and leghaemoglobin was present in nodules. All bacterial strains were identified as Bradyrhizobium spp. according to the partial 16S rDNA sequences, and they were infective in vitro in the model species Macroptilium atropurpuretan. About 35-50% of N in the leaves of P. officinalis, H. corymbosa and I. pilosula was fixed from the atmosphere. Dinitrogen fixation was estimated to contribute at least 8-13% and 1728% to whole-canopy N in high and low microsites, respectively. Symbiotic N, fixation appears to provide both a competitive advantage to legume trees under N-limited, flooded conditions and an important N input to neotropical freshwater swamp forests. |
| Address |
Univ Helsinki, Dept Forest Ecol, FIN-00014 Helsinki, Finland |
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| Publisher |
CAMBRIDGE UNIV PRESS |
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Edition |
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| ISSN |
0266-4674 |
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| Notes |
ISI:000186710800005 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
242 |
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| Author |
Sebbenn, A.M.; Blanc-Jolivet, C.; Mader, M.; Meyer-Sand, B.R.V.; Paredes-Villanueva, K.; Honorio Coronado, E.N.; García-Dávila, C.; Tysklind, N.; Troispoux, V.; Delcamp, A.; Degen, B. |
| Title |
Nuclear and plastidial SNP and INDEL markers for genetic tracking studies of Jacaranda copaia |
Type |
Journal Article |
| Year |
2019 |
Publication |
Conservation Genetics Resources |
Abbreviated Journal |
Conserv. Gen. Res. |
| Volume |
11 |
Issue |
3 |
Pages |
341-343 |
| Keywords |
DNA fingerprints; Geographical origin; Jacaranda copaia; MassARRAY; MiSeq; RADSeq; Tropical timber |
| Abstract |
Nuclear and plastidial single nucleotide polymorphism (SNP) and INDEL markers were developed using restriction associated DNA sequencing (RADSeq) and low coverage MiSeq genome sequencing for population genetics and timber tracking purposes in the Neotropical timber species Jacaranda copaia. We used 407 nuclear SNPs, 29 chloroplast, and 31 mitochondrial loci to genotype 92 individuals from Brazil, Bolivia, French Guiana, and Peru. Based on high amplification rates and genetic differentiation among populations, 113 nuclear SNPs, 11 chloroplast, and 4 mitochondrial loci were selected, and their use validated for genetic tracking of timber origin. |
| Address |
BIOGECO, INRA, Univ. Bordeaux, Cestas, 33610, France |
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| Publisher |
Springer Netherlands |
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Edition |
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| ISSN |
18777252 (Issn) |
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| Notes |
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Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
907 |
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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 |
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 |
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Thesis |
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| Publisher |
NATURE PUBLISHING GROUP |
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0018-067X |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
ISI:000276952000005 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
60 |
| Permanent link to this record |
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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 relations between 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 |
105 |
Issue |
4 |
Pages |
401-411 |
| Keywords |
nucleotide diversity; candidate gene; QTL; Quercus petraea |
| Abstract |
Nucleotide diversity was assessed within nine candidate genes (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 time of bud burst observed in common garden experiments (provenance tests). The candidate genes 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 candidate genes 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) 105, 401-411; doi:10.1038/hdy.2009.170; published online 9 December 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 |
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| Publisher |
NATURE PUBLISHING GROUP |
Place of Publication |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0018-067X |
ISBN |
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Conference |
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| Notes |
ISI:000282059900010 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
41 |
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| Author |
Konig, A.O.; Ziegenhagen, B.; van Dam, B.C.; Csaikl, U.M.; Coart, E.; Degen, B.; Burg, K.; de Vries, S.M.G.; Petit, R.J. |
| Title |
Chloroplast DNA variation of oaks in western Central Europe and genetic consequences of human influences |
Type |
Journal Article |
| Year |
2002 |
Publication |
Forest Ecology and Management |
Abbreviated Journal |
For. Ecol. Manage. |
| Volume |
156 |
Issue |
1-3 |
Pages |
147-166 |
| Keywords |
Q. robur; Q. petraea; PCR-RFLPs; haplotypes; spatial genetic patterns; genetic differentiation; deforestation; seed transfer |
| Abstract |
Oak chloroplast DNA (cpDNA) variation was studied in a grid-based inventory in western Central Europe, including Belgium, The Netherlands, Luxembourg, Germany, the Czech Republic, and the northern parts of Upper and Lower Austria. A total of 2155 trees representing 426 populations of Quercus robur L. and Q. petraea (Matt.) Liebl. were screened for polymorphism in up to four PCR-amplified cpDNA fragments. Eleven haplotypes belonging to four lineages were detected; these lineages were formerly restricted to glacial refugia in the Iberian Peninsula, the Apennine Peninsula and the Balkan Peninsula. The haplotypes originating from the Apennines are particularly well represented in the study region, but there is also a significant contribution from the other refugia, which explain the high overall level of cpDNA diversity. The strong human impact in western Central Europe during the past centuries, which has resulted in the clearance of most forests, was followed by reforestation, sometimes involving seed transfers. Despite this strong human impact, broad geographic patterns of lineages and haplotypes could still be detected. To evaluate further the consequences of the former human activities on the present day oak cpDNA genetic structure, four regions where increasingly strong human impact was anticipated (ranging from hilly regions in southern Germany to roadsides plantations in The Netherlands) were selected. There, a comparison of the levels of intrapopulation cpDNA diversity and spatial structuring was made. Over the whole area, within stand diversity was significantly higher in Q. robur than in Q. petraea (h(S) = 0.24 vs. 0.16). Since total diversity is identical for both species, this results in a significantly lower level of fixation for Q. robur than for Q. petraea (G(ST) = 0.68 vs. 0.79). The analyses also reveal a decrease of fixation with increasing human impact on oak populations. The Dutch roadside plantations (Q. robur) exhibit a very low level of fixation (G(ST) = 0.28) as compared to Q. petraea in southern Germany (G(ST) = 0.91). The significance of the spatial genetic structure was tested using geostatistical methods. For the complete data set, a strong spatial genetic structure is confirmed, with higher than average genetic similarities between populations distant from up to 270 km, whereas there is no spatial structure in the roadside plantations in The Netherlands or in the northern German lowlands. These results should help to differentiate introduced from autochthonous populations, and provide a framework for the identification of the geographic origin of seed lots. (C) 2002 Elsevier Science B.V. All rights reserved. |
| Address |
Inst FOrstgenet & Forstpflanzenzuchtung, BFH, D-22927 Grosshansdorf, Germany |
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| Publisher |
ELSEVIER SCIENCE BV |
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Series Issue |
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Edition |
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| ISSN |
0378-1127 |
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| Notes |
ISI:000174149400010 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
276 |
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| Author |
Diatta, Bétémondji Désiré ; Niass, Ousmane ; Diouf, Massamba ; Guéye, Mathieu ; Houel, Emeline ; Boetsch, Gilles |
| Title |
Diversité et composition phytochimique des bâtonnets frotte-dents (cure-dents) proposés chez les Peul de la commune de Tessékéré (Ferlo Nord, Sénégal) |
Type |
Journal Article |
| Year |
2021 |
Publication |
Journal of Applied Biosciences |
Abbreviated Journal |
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| Volume |
158 |
Issue |
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Pages |
16267-16281 |
| Keywords |
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| Abstract |
Objectifs : Le but de cette étude était de déterminer la composition phytochimique et la teneur en grandes classes chimiques des tiges les plus utilisées comme bâtonnets frotte-dents chez les peul de Widou Thiengoli au Nord Ferlo (Sénégal). Méthodes et résultats : Des entretiens ouverts semi structurés ont permis de recueillir les plantes les plus utilisées. L’indice de fidélité renseigne sur la convergence des usages quant à l’emploi des plantes comme bâtonnets frotte-dent comparé aux autres pratiques cosmétiques. L’étude de la composition phytochimique des tiges a ciblé 8 classes chimiques. Les tanins et les saponines sont très fréquents ; les terpénoïdes et les leuco-anthocyanines presque inexistants. Un dosage des flavonoïdes, alcaloïdes et polyphénols, réalisé chez des extraits aqueux, a porté sur 12 plantes. Les meilleures teneurs en polyphénols et alcaloïdes sont recueillies chez Anogeissus leiocarpa, et la meilleure en flavonoïdes chez Commiphora africana. Conclusion et applicabilité des résultats : Ces résultats permettent de sélectionner à travers la composition phytochimique des plantes, les espèces présentant de potentielles activités antimicrobiennes, car renfermant des composés phytochimique doués de fonctions germicides, au- delà de la fonction mécanique connue des bâtonnets dans l’élimination de la plaque dentaire. |
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Elewa |
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1997-5902 |
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no |
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EcoFoG @ webmaster @ |
Serial |
1053 |
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| Author |
Siebicke, L.; Hunner, M.; Foken, T. |
| Title |
Aspects of CO 2 advection measurements |
Type |
Journal Article |
| Year |
2012 |
Publication |
Theoretical and Applied Climatology |
Abbreviated Journal |
Theor. Appl. Climatol. |
| Volume |
109 |
Issue |
1-2 |
Pages |
109-131 |
| Keywords |
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| Abstract |
Observations of vegetation-atmosphere exchange of carbon dioxide (CO 2) by the eddy covariance (EC) technique are limited by difficult conditions such as nighttime and heterogeneous terrain. Thus, advective flux components are included into the net ecosystem exchange (NEE) budget. However, advection measurements are experimentally challenging and do not always help to solve the night flux problem of the EC technique. This study investigates alternative methods for the observation of horizontal advection, in particular horizontal concentration gradients, as well as different approaches to coordinate rotation and vertical advection. Continuous high-frequency measurements of the horizontal CO 2 concentration field are employed and compared to the often used discontinuous sequential sampling. Significant differences were found in the case of 30-min mean concentration values between the conventional discontinuous sampling approach and the complete observation of the time series by continuous sampling. Estimates of vertical advection rely on accurate estimates of vertical wind velocity (W). Therefore, different approaches to the planar fit coordinate rotation have been investigated. Sector-wise rotation was able to eliminate directional dependencies of mean W. Furthermore, the effect of the data set length used for rotation (window length) was investigated and was found to have significant impact on estimates of vertical advection, with larger window lengths yielding about 50% larger vertical advection. A sequential planar fit with controlled window length is proposed to give reproducible results. The different approaches to the measurement and calculation of horizontal and vertical advection presented are applied to data obtained during the exchange processes in mountainous region experiment at the FLUXNET site Waldstein-Weidenbrunnen (DE-Bay). Estimates of NEE including advection are compared to NEE from turbulent and storage flux alone without advection. NEE including vertical advection with sector-wise planar fit rotation and controlled window length and including horizontal advection from continuous gradient measurements, which were comprehensively bias corrected by a new approach, did compare well with the expected night flux error, with meteorological drivers of the fluxes and with soil chamber measurements. Unrealistically large and noisy values of horizontal advection from the conventional discontinuous sampling approach, which lead to unrealistic values of NEE, could be eliminated by the alternative approaches presented. We therefore suggest the further testing of those approaches at other sites in order to improve the accuracy of advection measurements and, subsequently, estimates of NEE. © 2011 Springer-Verlag. |
| Address |
Wind Cert Services, TÜV SÜD Industrie Service GmbH, Ludwig-Eckert-Str. 10, 93049 Regensburg, Germany |
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0177798x (Issn) |
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Export Date: 27 June 2012; Source: Scopus; doi: 10.1007/s00704-011-0552-3; Language of Original Document: English; Correspondence Address: Siebicke, L.; Department of Micrometeorology, University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth, Germany; email: lukas.siebicke@uni-bayreuth.de |
Approved |
no |
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EcoFoG @ webmaster @ |
Serial |
406 |
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| Author |
Ruelle, J.; Beauchene, J.; Thibaut, A.; Thibaut, B. |
| Title |
Comparison of physical and mechanical properties of tension and opposite wood from ten tropical rainforest trees from different species |
Type |
Journal Article |
| Year |
2007 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
| Volume |
64 |
Issue |
5 |
Pages |
503-510 |
| Keywords |
tension wood; opposite wood; tropical rainforest; physical and mechanical properties |
| Abstract |
On 10 trees from 10 species of French Guyana tropical rainforest in a clear active process of restoring verticality growth strains were measured in situ in order to determine the occurrence of tension wood within samples. Wood specimens were cut in the vicinity of the growth strains measurements in order to measure some mechanical and physical properties. As suspected, tensile growth strains was very much higher in tension wood zone, because longitudinal modulus of elasticity was slightly higher. Longitudinal shrinkage was also much higher in tension wood than in opposite wood. |
| Address |
UMR EcoFoG, Kourou 97387, Guyana, Email: ruelle@nuagr1.agr.nagoya-u.ac.jp |
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| Publisher |
EDP SCIENCES S A |
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Series Issue |
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Edition |
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| ISSN |
1286-4560 |
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| Notes |
ISI:000248098600003 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
160 |
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| Author |
Groc, S.; Delabie, J.H.C.; Fernandez, F.; Petitclerc, F.; Corbara, B.; Leponce, M.; Céréghino, R.; Dejean, A. |
| Title |
Litter-dwelling ants as bioindicators to gauge the sustainability of small arboreal monocultures embedded in the Amazonian rainforest |
Type |
Journal Article |
| Year |
2017 |
Publication |
Ecological Indicators |
Abbreviated Journal |
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| Volume |
82 |
Issue |
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Pages |
43-49 |
| Keywords |
Ant diversity; Community alteration; Forest species; Functional traits; Human disturbance; Tree monocultures |
| Abstract |
One of the greatest threats to biodiversity and the sustainable functioning of ecosystems is the clearing of forests for agriculture. Because litter-dwelling ants are very good bioindicators of man-made disturbance, we used them to compare monospecific plantations of acacia trees, cocoa trees, rubber trees and pine trees with the surrounding Neotropical rainforest (in contrast to previous studies on forest fragments embedded in industrial monocultures). Although the global level of species turnover was weak, species richness decreased along a gradient from the forest (including a treefall gap) to the tree plantations among which the highest number of species was noted for the cocoa trees, which are known to be a good compromise between agriculture and conservation. Species composition was significantly different between natural habitats and the plantations that, in turn, were different from each other. Compared to the forest, alterations in the ant communities were (1) highest for the acacia and rubber trees, (2) intermediate for the cocoa trees, and, (3) surprisingly, far lower for the pine trees, likely due to very abundant litter. Functional traits only separated the rubber tree plantation from the other habitats due to the higher presence of exotic and leaf-cutting ants. This study shows that small monospecific stands are likely sustainable when embedded in the rainforest and that environmentally-friendly strategies can be planned accordingly. © 2017 Elsevier Ltd |
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Ecolab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France |
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Export Date: 9 July 2017 |
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no |
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EcoFoG @ webmaster @ |
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758 |
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