| Records |
| Author |
Sellan, G. ; Brearley, FQ. ; Nilus, R. ; Ttin, J. ; Majalap-Lee, N. |
| Title |
Differences in soil properties among contrasting soil types in Northern Borneo |
Type |
Journal Article |
| Year |
2021 |
Publication |
Journal of Tropical Forest Science |
Abbreviated Journal |
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| Volume |
33 |
Issue |
2 |
Pages |
191-202 |
| Keywords |
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| Abstract |
Soil in the tropics is high in diversity, and despite the diversity of Borneo’s forest–soil associations, there is a paucity of data on its soil properties. We investigated the differences between three soil types in the Kabili–Sepilok Forest Reserve, Sabah, Malaysia, encompassing the contrasting alluvial, sandstone and heath forest typologies. We examined the distribution of nutrients between soil types and through soil depths, and assessed the extent of spatial autocorrelation in the three soil types. We confirmed the fertility gradient from alluvial to heath forest soil found by others. Soil elemental concentrations declined in deeper horizons with the exception of exchangeable sodium and aluminium that remained constant through alluvial and sandstone soil profiles. Spatial autocorrelation was present in all three soil types and strongest in the sandstone soil. Overall, we show how bedrock, erosion, leaching and topography influence soil properties across this mosaic of soil types and note their importance in influencing tree communities and their ecological functioning. |
| Address |
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| Publisher |
FOREST RESEARCH INST MALAYSIA |
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Edition |
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ISSN  |
0128-1283 |
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no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
1017 |
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| Author |
Seymour, R.S.; Gibernau, M.; Pirintsos, S.A. |
| Title |
Thermogenesis of three species of Arum from Crete |
Type |
Journal Article |
| Year |
2009 |
Publication |
Plant Cell and Environment |
Abbreviated Journal |
Plant Cell Environ. |
| Volume |
32 |
Issue |
10 |
Pages |
1467-1476 |
| Keywords |
Araceae; arum lily; inflorescence; pollination; temperature regulation |
| Abstract |
Inflorescences of arum lilies have a three-part spadix with a scent-producing, sterile appendix above two bands of fertile male and female florets. The appendix and male florets are thermogenic, but with different temporal patterns. Heat-production was measured in Arum concinnatum, A. creticum and A. idaeum. The male florets of A. concinnatum showed a 3 d continuous episode of thermogenesis with three waves, and the appendix warmed in a single, 6 h episode. Maximum fresh-mass-specific CO2 production rate was 0.17 μmol s(-1) g(-1) to achieve a 10.9 degrees C temperature elevation by the appendix, and 0.92 μmol s(-1) g(-1) to achieve a 4.8 degrees C elevation by male florets. Reversible, physiological temperature regulation was not evident in either tissue. Respiration increased with tissue temperatures with Q(10) values of 1.8-3.9, rather than less than 1.0 as occurs in thermoregulatory flowers. Experimental step changes in temperature of appendix and male floret tissues also failed to show thermoregulatory responses. The patterns of thermogenesis therefore appear to be fixed by the temporal sequence of blooming. Thermogenesis in the alpine species, A. creticum and A. idaeum, was significantly lower than in the lowland A. concinnatum, possibly related to difficulty in raising floral temperature in their cold and windy habitat. |
| Address |
[Seymour, Roger S.] Univ Adelaide, Adelaide, SA 5005, Australia, Email: roger.seymour@adelaide.edu.au |
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| Publisher |
WILEY-BLACKWELL PUBLISHING, INC |
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Series Issue |
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Edition |
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| ISSN |
0140-7791 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
ISI:000269592300016 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
195 |
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| Author |
Parelle, J.; Zapater, M.; Scotti-Saintagne, C.; Kremer, A.; Jolivet, Y.; Dreyer, E.; Brendel, O. |
| Title |
Quantitative trait loci of tolerance to waterlogging in a European oak (Quercus robur L.): physiological relevance and temporal effect patterns |
Type |
Journal Article |
| Year |
2007 |
Publication |
Plant Cell and Environment |
Abbreviated Journal |
Plant Cell Environ. |
| Volume |
30 |
Issue |
4 |
Pages |
422-434 |
| Keywords |
allelic substitution effect; correlation clustering; epinasty; hypertrophied lenticel; multi-environment model; root hypoxia |
| Abstract |
Quercus robur L. is a mid-European broadleaved tree species that grows readily on temporary waterlogged soils. An experiment aiming to identify potential markers of tolerance to waterlogging in this species and to assess the degree of genetic control over the corresponding traits was conducted. Quantitative trait loci (QTL) were assessed in an F-1 progeny for responses to waterlogging, and the relevance of the observed traits as markers of tolerance was investigated using a precise description of the time course of their expression. Five significant QTL involved in the response to waterlogging were identified. In particular, QTL were detected for the development of hypertrophied lenticels and for the degree of leaf epinasty, but not for the formation of adventitious roots. A multi-environment QTL model allowed a detailed description of the time course (7 weeks) of the allelic substitution effect of some of these QTL. Correlation clustering identified significant clusters of QTL, at inter-trait as well as at intra-trait level. These clusters suggest the occurrence of a genetically controlled response cascade to waterlogging. |
| Address |
UHP, UMR 1137, Ctr INRA Nancy, F-54280 Champenoux, France, Email: brendel@nancy.inra.fr |
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Thesis |
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| Publisher |
BLACKWELL PUBLISHING |
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Summary Language |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0140-7791 |
ISBN |
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Medium |
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| Area |
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Conference |
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| Notes |
ISI:000244419700005 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
219 |
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| Author |
Bonal, D.; Ponton, S.; Le Thiec, D.; Richard, B.; Ningre, N.; Herault, B.; Ogee, J.; Gonzalez, S.; Pignal, M.; Sabatier, D.; Guehl, J.M. |
| Title |
Leaf functional response to increasing atmospheric CO(2) concentrations over the last century in two northern Amazonian tree species: a historical delta(13)C and delta(18)O approach using herbarium samples |
Type |
Journal Article |
| Year |
2011 |
Publication |
Plant Cell and Environment |
Abbreviated Journal |
Plant Cell Environ. |
| Volume |
34 |
Issue |
8 |
Pages |
1332-1344 |
| Keywords |
carbon isotope composition; environmental change; herbarium; oxygen isotope composition; photosynthesis; stomata; tropical rainforests |
| Abstract |
We assessed the extent of recent environmental changes on leaf morphological (stomatal density, stomatal surface, leaf mass per unit area) and physiological traits (carbon isotope composition, delta(13)C(leaf), and discrimination, Delta(13)C(leaf), oxygen isotope composition, delta(18)O(leaf)) of two tropical rainforest species (Dicorynia guianensis; Humiria balsamifera) that are abundant in the Guiana shield (Northern Amazonia). Leaf samples were collected in different international herbariums to cover a 200 year time-period (1790-2004) and the whole Guiana shield. Using models describing carbon and oxygen isotope fractionations during photosynthesis, different scenarios of change in intercellular CO(2) concentrations inside the leaf (C(i)), stomatal conductance (g), and photosynthesis (A) were tested in order to understand leaf physiological response to increasing air CO(2) concentrations (C(a)). Our results confirmed that both species displayed physiological response to changing C(a). For both species, we observed a decrease of about 1.7% in delta(13)C(leaf) since 1950, without significant change in Delta(13)C(leaf) and leaf morphological traits. Furthermore, there was no clear change in delta(18)O(leaf) for Humiria over this period. Our simulation approach revealed that an increase in A, rather than a decrease in g, explained the observed trends for these tropical rainforest species, allowing them to maintain a constant ratio of C(i)/C(a). |
| Address |
[Bonal, D] INRA, UMR Ecofog, F-97387 Kourou, France, Email: bonal@nancy.inra.fr |
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Thesis |
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| Publisher |
Wiley-Blackwell |
Place of Publication |
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Summary Language |
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Original Title |
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| Series Editor |
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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 |
0140-7791 |
ISBN |
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Medium |
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| Area |
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Conference |
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| Notes |
WOS:000292698900010 |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
330 |
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| Author |
Gond, V.; Bartholome, E.; Ouattara, F.; Nonguierma, A.; Bado, L. |
| Title |
Monitoring and mapping of waters and wetlands in arid regions using the SPOT-4 VEGETATION imaging system |
Type |
Journal Article |
| Year |
2004 |
Publication |
International Journal of Remote Sensing |
Abbreviated Journal |
Int. J. Remote Sens. |
| Volume |
25 |
Issue |
5 |
Pages |
987-1004 |
| Keywords |
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| Abstract |
Monitoring the state of small waterbodies and wetlands is very useful in dry regions, because their existence is entirely controlled by the rhythm of local rainfall. On VEGETATION image colour composites, waterbodies and marshy vegetation show up clearly. Yet simple image classification does not yield sufficiently good results because 'spectral signatures' vary significantly together with the ecological conditions of these surfaces. A robust contextual procedure taking into account local contrast was successfully developed and tested. A systematic validation was carried out and a map of waterbodies and wetlands was produced for Burkina Faso and neighbouring regions. |
| Address |
Ctr Commun Rech, I-21020 Ispra, VA, Italy, Email: valery.gond@cirad.fr |
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Thesis |
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| Publisher |
TAYLOR & FRANCIS LTD |
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Summary Language |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0143-1161 |
ISBN |
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Medium |
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| Notes |
ISI:000187996500007 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
266 |
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| Author |
Verbeeck, H.; Peylin, P.; Bacour, C.; Bonal, D.; Steppe, K.; Ciais, P. |
| Title |
Seasonal patterns of CO2 fluxes in Amazon forests: Fusion of eddy covariance data and the ORCHIDEE model |
Type |
Journal Article |
| Year |
2011 |
Publication |
Journal Of Geophysical Research-Biogeosciences |
Abbreviated Journal |
J. Geophys. Res.-Biogeosci. |
| Volume |
116 |
Issue |
2 |
Pages |
G02018 |
| Keywords |
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| Abstract |
[1] In some regions of the Amazon, global biogeophysical models have difficulties in reproducing measured seasonal patterns of net ecosystem exchange (NEE) of carbon dioxide. The global process-based biosphere model Organizing Carbon and Hydrology in Dynamic Ecosystems (ORCHIDEE) used in this study showed that a standard model parameterization produces seasonal NEE patterns that are opposite in phase to the eddy flux data of the tropical evergreen forest at the Tapajos km 67 site (Brazil), like many other global models. However, we optimized several key parameters of ORCHIDEE using eddy covariance data of the Tapajos km 67 site in order to identify the driving factors of the seasonal variations in CO2 flux in this tropical forest ecosystem. The validity of the retrieved parameter values was evaluated for two other flux tower sites in the Amazon. The different tested optimization scenarios showed that only a few parameters substantially improve the fit to NEE and latent heat data. Our results confirm that these forests have the ability to maintain high transpiration and photosynthesis during the dry season in association with a large soil depth (D-soil = 10 m) and a rooting system density that decreases almost linearly with depth (H-root = 0.1). Previous analyses of seasonal variations in eddy covariance fluxes indicated that higher GPP levels were reached in the dry season compared to the wet season. Our optimization analysis suggests that this pattern could be caused by a leaf flush at the start of the dry season increasing the photosynthetic capacity of the canopy. Nevertheless, the current model structure is not yet able to simulate such a leaf flush, and we therefore suggest improving the ORCHIDEE model by including a specific phenology module that is driven by light availability for the tropical evergreen plant functional types. In addition, our results highlight both the potential and the limitations of flux data to improve global terrestrial models. Several parameters were not identifiable, and the risk of overfitting of the model was illustrated. Nevertheless, we conclude that these models can be improved substantially by assimilating site level flux data over the tropics. |
| Address |
[Verbeeck, Hans; Steppe, Kathy] Univ Ghent, Plant Ecol Lab, Dept Appl Ecol & Environm Biol, Fac Biosci Engn, B-9000 Ghent, Belgium, Email: hans.verbeeck@ugent.be |
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| Publisher |
Amer Geophysical Union |
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Summary Language |
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Series Issue |
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Edition |
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| ISSN |
0148-0227 |
ISBN |
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Conference |
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| Notes |
ISI:000290933500002 |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
321 |
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| Author |
Rodrigues, A.M.S.; Theodoro, P.N.E.T.; Eparvier, V.; Basset, C.; Silva, M.R.R.; Beauchene, J.; Espindola, L.S.; Stien, D. |
| Title |
Search for Antifungal Compounds from the Wood of Durable Tropical Trees |
Type |
Journal Article |
| Year |
2010 |
Publication |
Journal of Natural Products |
Abbreviated Journal |
J. Nat. Prod. |
| Volume |
73 |
Issue |
10 |
Pages |
1706-1707 |
| Keywords |
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| Abstract |
Research on antifungal compounds from the durable wood from French Guiana Amazonian forest trees highlights the correlation between the activity of their extracts against wood-rotting fungi and human pathogens. The fractionation of an ethyl acetate extract of Sextonia rubra wood led to the isolation of rubrenolide (1) and rubrynolide (2). The potential of compounds 1 and 2 is described through the evaluation of their activity against 16 pathogenic fungi and their cytotoxicity toward NIH-3T3 mammalian fibroblast cells. |
| Address |
[Rodrigues, Alice M. S.; Eparvier, Veronique; Basset, Charlie; Espindola, Laila S.; Stien, Didier] Univ Antilles Guyane, CNRS, UMR ECOFOG, F-97300 Cayenne, France, Email: darvenne@unb.br |
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| Publisher |
AMER CHEMICAL SOC |
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Edition |
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| ISSN |
0163-3864 |
ISBN |
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| Notes |
ISI:000283288900015 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
25 |
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| Author |
Cabanillas, B.J.; Le Lamer, A.C.; Castillo, D.; Arevalo, J.; Rojas, R.; Odonne, G.; Bourdy, G.; Moukarzel, B.; Sauvain, M.; Fabre, N. |
| Title |
Caffeic Acid Esters and Lignans from Piper sanguineispicum |
Type |
Journal Article |
| Year |
2010 |
Publication |
Journal of Natural Products |
Abbreviated Journal |
J. Nat. Prod. |
| Volume |
73 |
Issue |
11 |
Pages |
1884-1890 |
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| Abstract |
Three new caffeic acid esters (1-3), four new lignans (4-7), and the known compounds (7'S)-parabenzlactone (8), dihydrocubebin (9), and justiflorinol (10) have been isolated from leaves of Piper sanguineispicum. Their structures were determined by spectroscopic methods, including 1D and 2D NMR, HRCIMS, CD experiments, and chemical methods. Compounds 1-10 were assessed for their antileishmanial potential against axenic amastigote forms of Leishmania amazonensis. Caffeic acid esters 1 and 3 exhibited the best antileishmanial activity (IC50 2.0 and 1.8 μM, respectively) with moderate cytotoxicity on murine macrophages. |
| Address |
[Cabanillas, Billy Joel; Le Lamer, Anne-Cecile; Odonne, Guillaume; Bourdy, Genevieve; Moukarzel, Beatrice; Sauvain, Michel; Fabre, Nicolas] Univ Toulouse, UPS, UMR 152, Lab Pharmacochim Subst Nat & Pharmacophores Redox, F-31062 Toulouse 9, France, Email: michel.sauvain@ird.fr |
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AMER CHEMICAL SOC |
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Edition |
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| ISSN |
0163-3864 |
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| Notes |
ISI:000284559100024 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
74 |
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| Author |
Nirma, C.; Eparvier, V.; Stien, D. |
| Title |
Antifungal agents from Pseudallescheria boydii SNB-CN73 isolated from a nasutitermes sp. termite |
Type |
Journal Article |
| Year |
2013 |
Publication |
Journal of Natural Products |
Abbreviated Journal |
J. Nat. Prod. |
| Volume |
76 |
Issue |
5 |
Pages |
988-991 |
| Keywords |
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| Abstract |
Defense mutualisms between social insects and microorganisms have been described in the literature. The present article describes the discovery of a Pseudallescheria boydii strain isolated from Nasutitermes sp. The microbial symbiont produces two antifungal metabolites: tyroscherin and N-methyltyroscherin, a compound not previously described in the literature. Methylation of tyroscherin has confirmed the structure of N-methyltyroscherin. Both compounds are effective antifungal agents with favorable selectivity indices for Candida albicans and Trichophyton rubrum. © 2013 The American Chemical Society and American Society of Pharmacognosy. |
| Address |
UMR Ecofog, Institut Pasteur de la Guyane, Université des Antilles et de la Guyane, 23 Avenue Pasteur, 97306 Cayenne, France |
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Series Issue |
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Edition |
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| ISSN |
01633864 (Issn) |
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| Notes |
Export Date: 6 June 2013; Source: Scopus; Coden: Jnprd; :doi 10.1021/np4001703; Language of Original Document: English; Correspondence Address: Eparvier, V.; CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France; email: veronique.eparvier@icsn.cnrs-gif.fr |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
491 |
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| Author |
Leroy, C.; Sabatier, S.; Wahyuni, N.S.; Barczi, J.F.; Dauzat, J.; Laurans, M.; Auclair, D. |
| Title |
Virtual trees and light capture: a method for optimizing agroforestry stand design |
Type |
Journal Article |
| Year |
2009 |
Publication |
Agroforestry Systems |
Abbreviated Journal |
Agrofor. Syst. |
| Volume |
77 |
Issue |
1 |
Pages |
37-47 |
| Keywords |
Acacia mangium; Tectona grandis; Agroforestry; Light interception; Plant architecture; Simulation; 3D virtual plant |
| Abstract |
In agroforestry systems, the distribution of light transmitted under tree canopies can be a limiting factor for the development of intercrops. The light available for intercrops depends on the quantity of light intercepted by tree canopies and, consequently, on the architecture of the tree species present. The influence of tree architecture on light transmission was analysed using dynamic 3D architectural models. The architectural analysis of Acacia mangium and Tectona grandis was performed in Indonesian agroforestry systems with trees aged from 1 to 3 years. 3D virtual trees were then generated with the AmapSim simulation software and 3D virtual experiments in which tree age, planting density, planting pattern and pruning intensity varied were reconstructed in order to simulate light available for the crop. Canopy closure of trees was more rapid in A. mangium than in T. grandis agroforestry systems; after 3 years the quantity of light available for A. mangium intercrops was three times lower than under T. grandis. Simulations with A. mangium showed that practices such as pruning and widening tree spacing enable to increase the total transmitted light within the stand. On T. grandis, modification of the tree row azimuth resulted in changes in the spatial and seasonal distribution of light available for the intercrops. These results are discussed in terms of agroforestry system management. |
| Address |
[Sabatier, Sylvie; Barczi, Jean-Francois; Dauzat, Jean; Laurans, Marilyne] CIRAD, UMR AMAP Botan & Bioinformat Architecture Plantes, F-34398 Montpellier 5, France, Email: sylvie-annabel.sabatier@cirad.fr |
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| Publisher |
SPRINGER |
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Series Issue |
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Edition |
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| ISSN |
0167-4366 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
ISI:000268865600004 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
199 |
| Permanent link to this record |
