Records |
Author |
Almeras, T.; Yoshida, M.; Okuyama, T. |
Title |
The generation of longitudinal maturation stress in wood is not dependent on diurnal changes in diameter of trunk |
Type |
Journal Article |
Year |
2006 |
Publication |
Journal of Wood Science |
Abbreviated Journal |
J. Wood Sci. |
Volume |
52 |
Issue |
5 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
452-455 |
Keywords |
maturation stress; growth stress; cell-wall maturation; continuous lighting; diurnal strains |
Abstract |
A hypothetical mechanism for the generation of maturation stress in wood was tested experimentally. The hypothesis was that the maturation stress could partly originate in a physical mechanism related to daily changes in water pressure and associated diurnal strains. The matrix of lignin and hemicellulose, deposited in the cell wall during the night, would be put in compression by the effect of water tension during the next day. The cellulose framework, crystallizing during the day, would be put in tension by the decrease in tension at night and subsequent cell-wall swelling. This was tested on young saplings of sugi and beech. Half of the saplings were submitted to continuous lighting, which canceled diurnal strains. Saplings were tilted 40 degrees, and their uprighting movement was measured. The uprighting movement is directly due to the production of reaction wood and the concomitant development of large longitudinal maturation stress. It occurred in the continuously lighted plants at least as much as in control plants. We conclude that the generation of longitudinal maturation stress in tension or compression wood is not directly related to variations in water pressure and diurnal strains. |
Address |
Nagoya Univ, Grad Sch Bioagr Sci, Lab Biomat Phys, Chikusa Ku, Nagoya, Aichi 4648601, Japan, Email: t_almeras@hotmail.com |
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SPRINGER TOKYO |
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1435-0211 |
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ISI:000241010600012 |
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no |
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EcoFoG @ eric.marcon @ |
Serial |
222 |
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Author |
Hamon, P.; Duroy, P.-O.; Dubreuil-Tranchant, C.; Mafra D'Almeida Costa, P.; Duret, C.; Razafinarivo, N.J.; Couturon, E.; Hamon, S.; De Kochko, A.; Poncet, V.; Guyot, R. |
Title |
Two novel Ty1-copia retrotransposons isolated from coffee trees can effectively reveal evolutionary relationships in the Coffea genus (Rubiaceae) |
Type |
Journal Article |
Year |
2011 |
Publication |
Molecular Genetics and Genomics |
Abbreviated Journal |
Mol. Genet. Genomics |
Volume |
285 |
Issue |
6 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
447-460 |
Keywords |
Coffea; Evolution; Genetic diversity; LTR-retrotransposons; article; coffee; controlled study; Divo; gene amplification; gene dosage; gene expression; gene insertion; gene locus; gene sequence; genetic identification; genetic polymorphism; genetic variability; molecular cloning; Nana; nonhuman; nucleotide sequence; phylogeny; plant evolution; plant gene; priority journal; Psilanthus; random amplified microsatellite; retroposon; Rubiaceae; species differentiation; tree; Ty1 copia gene; Coffea; Genes, Plant; Genome, Plant; Phylogeny; Retroelements |
Abstract |
In the study, we developed new markers for phylogenetic relationships and intraspecies differentiation in Coffea. Nana and Divo, two novel Ty1-copia LTR-retrotransposon families, were isolated through C. canephora BAC clone sequencing. Nana- and Divo-based markers were used to test their: (1) ability to resolve recent phylogenetic relationships; (2) efficiency in detecting intra-species differentiation. Sequence-specific amplification polymorphism (SSAP), retrotransposon-microsatellite amplified polymorphism (REMAP) and retrotransposon-based insertion polymorphism (RBIP) approaches were applied to 182 accessions (31 Coffea species and one Psilanthus accession). Nana- and Divo-based markers revealed contrasted transpositional histories. At the BAC clone locus, RBIP results on C. canephora demonstrated that Nana insertion took place prior to C. canephora differentiation, while Divo insertion occurred after differentiation. Combined SSAP and REMAP data showed that Nana could resolve Coffea lineages, while Divo was efficient at a lower taxonomic level. The combined results indicated that the retrotransposon-based markers were useful in highlighting Coffea genetic diversity and the chronological pattern of speciation/differentiation events. Ongoing complete sequencing of the C. canephora genome will soon enable exhaustive identification of LTR-RTN families, as well as more precise in-depth analyses on contributions to genome size variation and Coffea evolution. © 2011 Springer-Verlag. |
Address |
IRD, UMR DIADE, BP 50172, Sainte Clotilde Cedex, La Réunion 97492, France |
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16174615 (Issn) |
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Export Date: 21 October 2011; Source: Scopus; Coden: Mggoa; doi: 10.1007/s00438-011-0617-0; PubMed ID: 21505885; Language of Original Document: English; Correspondence Address: Hamon, P.; IRD, UMR DIADE, BP 64501, Montpellier Cedex 5, France; email: perla.hamon@ird.fr; Molecular Sequence Numbers: GENBANK: DV666936, HM755952, HM755953;; Chemicals/CAS: Retroelements |
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no |
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EcoFoG @ webmaster @ |
Serial |
344 |
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Author |
Schimann, H.; Vleminckx, J.; Baraloto, C.; Engel, J.; Jaouen, G.; Louisanna, E.; Manzi, S.; Sagne, A.; Roy, M. |
Title |
Tree communities and soil properties influence fungal community assembly in neotropical forests |
Type |
Journal Article |
Year |
2020 |
Publication |
Biotropica |
Abbreviated Journal |
Biotropica |
Volume |
52 |
Issue |
3 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
444-456 |
Keywords |
communities; composition; diversity; habitat; lowland neotropical rain forest; macrofungi; soil properties; trees; ectomycorrhiza; fungus; heterogeneity; Neotropical Region; physicochemical property; rainforest; species inventory; species richness; tree; tropical forest; French Guiana; Agaricales; Aphyllophorales; Basidiomycota |
Abstract |
The influence exerted by tree communities, topography, and soil chemistry on the assembly of macrofungal communities remains poorly understood, especially in highly diverse tropical forests. Here, we used a large dataset that combines inventories of macrofungal Basidiomycetes fruiting bodies, tree species composition, and measurements for 16 soil physicochemical parameters, collected in 34 plots located in four sites of lowland rain forests in French Guiana. Plots were established on three different topographical conditions: hilltop, slope, and seasonally flooded soils. We found hyperdiverse Basidiomycetes communities, mainly comprising members of Agaricales and Polyporales. Phosphorus, clay contents, and base saturation in soils strongly varied across plots and shaped the richness and composition of tree communities. The latter composition explained 23% of the variation in the composition of macrofungal communities, probably through high heterogeneity of the litter chemistry and selective effects of biotic interactions. The high local heterogeneity of habitats influenced the distribution of both macrofungi and trees, as a result of diversed local soil hydromorphic conditions associated with contrasting soil chemistry. This first regional study across habitats of French Guiana forests revealed new niches for macrofungi, such as ectomycorrhizal ones, and illustrates how macrofungi inventories are still paramount to can be to understand the processes at work in the tropics. Abstract in Spanish is available with online material. © 2020 The Association for Tropical Biology and Conservation |
Address |
Laboratoire Évolution et Diversité Biologique, CNRS, UMR 5174 UPS CNRS ENFA IRD, Université Toulouse 3 Paul Sabatier, Toulouse, France |
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Blackwell Publishing Ltd |
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00063606 (Issn) |
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no |
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EcoFoG @ webmaster @ |
Serial |
968 |
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Author |
Seipke, R.F.; Barke, J.; Ruiz-Gonzalez, M.X.; Orivel, J.; Yu, D.W.; Hutchings, M.I. |
Title |
Fungus-growing Allomerus ants are associated with antibiotic-producing actinobacteria |
Type |
Journal Article |
Year |
2012 |
Publication |
Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology |
Abbreviated Journal |
Antonie Van Leeuwenhoek Int. J. Gen. Mol. Microbiol. |
Volume |
101 |
Issue |
2 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
443-447 |
Keywords |
Allomerus ants; Amycolatopsis; Ant-bacteria symbioses; Fungus-growing ants; Insect fungiculture; Streptomyces |
Abstract |
Fungus-growing attine ants use natural-product antibiotics produced by mutualist actinobacteria as 'weedkillers' in their fungal gardens. Here we report for the first time that fungus-growing Allomerus ants, which lie outside the tribe Attini, are associated with antifungal-producing actinobacteria, which offer them protection against non-cultivar fungi isolated from their ant-plants. © 2011 Springer Science+Business Media B.V. |
Address |
State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China |
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00036072 (Issn) |
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Notes |
Export Date: 21 March 2012; Source: Scopus; Coden: Aljma; doi: 10.1007/s10482-011-9621-y; Language of Original Document: English; Correspondence Address: Hutchings, M.I.; School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom; email: m.hutchings@uea.ac.uk |
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no |
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EcoFoG @ webmaster @ |
Serial |
385 |
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Author |
Petillon, J.; Montaigne, W.; Renault, D. |
Title |
Hypoxic coma as a strategy to survive inundation in a salt-marsh inhabiting spider |
Type |
Journal Article |
Year |
2009 |
Publication |
Biology Letters |
Abbreviated Journal |
Biol. Lett. |
Volume |
5 |
Issue |
4 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
442-445 |
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ISSN |
1744-9561 |
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Notes |
WOS:000267881700002 |
Approved |
no |
Call Number |
EcoFoG @ webmaster @ |
Serial |
288 |
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Author |
Vleminckx, J.; Bauman, D.; Demanet, M.; Hardy, O.J.; Doucet, J.-L.; Drouet, T. |
Title |
Past human disturbances and soil fertility both influence the distribution of light-demanding tree species in a Central African tropical forest |
Type |
Journal Article |
Year |
2020 |
Publication |
Journal of Vegetation Science |
Abbreviated Journal |
J. Veg. Sci. |
Volume |
31 |
Issue |
3 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
440-453 |
Keywords |
light-demanding species; moist tropical forests; past human disturbances; shade-bearer species; soil charcoal abundance; soil properties; tree community assemblages; wood-specific gravity; anthropogenic effect; forest canopy; forest ecosystem; shifting cultivation; soil fertility; soil property; tree; tropical forest; Cameroon |
Abstract |
Questions: In vast areas of Central African forests, the upper canopy is presently dominated by light-demanding tree species. Here, we confront three hypotheses to explain this dominance: (a) these species have expanded their distribution because of widespread past slash-and-burn activities, as suggested by important charcoal amounts recorded in the soils of the region; (b) their abundance is rather explained by soil properties, as this guild establishes preferentially on favourable physico-chemical conditions for rapid growth; (c) soil properties have been substantially influenced by past human disturbances and those two effects cannot be disentangled. Location: Pallisco-CIFM logging concession, southeastern Cameroon (300,000 ha). Methods: We quantified soil charcoal abundance and measured ten soil variables at the basis of 60 target trees that belonged to a list of three long-living pioneer light-demanding (LLP) and four shade-bearer (SB) species. We identified all stems with a diameter at breast height (DBH) ≥ 20 cm within a distance of 15 m around each target tree. Species were characterised by their wood-specific gravity (WSG), which reflected their light requirement. Multiple regression models were used to quantify and test the relative effects of charcoal abundance and soil variables on the mean WSG of the 60 tree communities, as well as the abundance of three guilds: LLP, SB, and non-pioneer light demanders (NPLD). Results: The mean WSG was the only response variable significantly explained by soil variables and charcoal abundance combined. It was significantly negatively associated with soil calcium and Mg content and with charcoal abundance, with soil and charcoal influencing the mean WSG independently. Conclusion: Our study provides evidence that past human disturbances and soil fertility have independently promoted the establishment of light-demanding species in western Central African forests, thereby shedding light on tree community assembly rules in these ecosystems which remain considerably understudied compared to the tropical forests of other continents. © 2020 International Association for Vegetation Science |
Address |
Forest is life, TERRA Teaching and Research Centre, Université de Liège – Gembloux Agro-Bio Tech, Gembloux, Belgium |
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Wiley-Blackwell |
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Edition |
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ISSN |
11009233 (Issn) |
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no |
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EcoFoG @ webmaster @ |
Serial |
970 |
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Author |
Guzman, Laura Melissa ; Trzcinski, M. Kurtis ; Barberis, Ignacio M. ; Cereghino, Régis ; Srivastava, Diane S. ; Gilbert Benjamin ; Pillar, Valerio D. ; de Omena, Paula M. ; MacDonald, A. Andrew M. ; Corbara, Bruno ; Leroy, Celine ; Bautista, Fabiola Ospina ; Romero, Gustavo Q. ; Kratina, Pavel ; Debastiani, Vanderlei J. ; Gonialves, Ana Z. ; Marino, Nicholas A.C. ; Farjalla, Vinicius F. ; Richardson, Barbara A. ; Richardson, Michael J. ; Dézerald, Olivier ; Piccoli, Gustavo, C. O. ; Jocqué, Merlijn ; Montero, Guillermo |
Title |
Climate influences the response of community functional traits to local conditions in bromeliad invertebrate communities |
Type |
Journal Article |
Year |
2021 |
Publication |
Ecography |
Abbreviated Journal |
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Volume |
44 |
Issue |
3 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
440-452 |
Keywords |
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Abstract |
Functional traits determine an organism's performance in a given environment and as such determine which organisms will be found where. Species respond to local conditions, but also to larger scale gradients, such as climate. Trait ecology links these responses of species to community composition and species distributions. Yet, we often do not know which environmental gradients are most important in determining community trait composition at either local or biogeographical scales, or their interaction. Here we quantify the relative contribution of local and climatic conditions to the structure and composition of functional traits found within bromeliad invertebrate communities. We conclude that climate explains more variation in invertebrate trait composition within bromeliads than does local conditions. Importantly, climate mediated the response of traits to local conditions; for example, invertebrates with benthic life-history traits increased with bromeliad water volume only under certain precipitation regimes. Our ability to detect this and other patterns hinged on the compilation of multiple fine-grained datasets, allowing us to contrast the effect of climate versus local conditions. We suggest that, in addition to sampling communities at local scales, we need to aggregate studies that span large ranges in climate variation in order to fully understand trait filtering at local, regional and global scales. |
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Nordic Society OIKOS |
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no |
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EcoFoG @ webmaster @ |
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1013 |
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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 ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
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 |
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NATURE PUBLISHING GROUP |
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0018-067X |
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ISI:000276952000005 |
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no |
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EcoFoG @ eric.marcon @ |
Serial |
60 |
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Author |
Vedel, V.; Brena, C.; Arthur, W. |
Title |
Demonstration of a heritable component of the variation in segment number in the centipede Strigamia maritima |
Type |
Journal Article |
Year |
2009 |
Publication |
Evolution & Development |
Abbreviated Journal |
Evol. Dev. |
Volume |
11 |
Issue |
4 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
434-440 |
Keywords |
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Abstract |
Here we address the question of how arthropod segment number may evolve by reporting the results of further work on the model system Strigamia maritima. Recently, we showed that there was a plastic component of the variation in segment number within this species; now we demonstrate that there is also a heritable component. This is important because it enables a connection to be made between the known latitudinal trend among species of geophilomorph centipedes ( more segments at lower latitudes) and the parallel trend within them. This latter trend is best documented in S. maritima but is also known in several other species. However, while a general connection between the inter- and intraspecific trends can now be made, deciding upon a specific hypothesis of the nature of the selection involved is still problematic. We provide two alternative hypotheses, one based on the temperature-related plasticity in segment number being adaptive, the other based on it being nonadaptive. |
Address |
[Vedel, Vincent; Arthur, Wallace] Natl Univ Ireland, Dept Zool, Sch Nat Sci, Galway, Ireland, Email: wallace.arthur@nuigalway.ie |
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WILEY-BLACKWELL PUBLISHING, INC |
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1520-541X |
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ISI:000267659600011 |
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no |
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EcoFoG @ eric.marcon @ |
Serial |
200 |
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Author |
Paine, C.E.T.; Harms, K.E.; Schnitzer, S.A.; Carson, W.P. |
Title |
Weak competition among tropical tree seedlings: Implications for species coexistence |
Type |
Journal Article |
Year |
2008 |
Publication |
Biotropica |
Abbreviated Journal |
Biotropica |
Volume |
40 |
Issue |
4 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
432-440 |
Keywords |
Brosimum alicastrum; competitive irrelevance; maintenance of biodiversity; Matisia cordata; resource competition; Panama; Peru; Pouteria reticulata; zone of influence |
Abstract |
The intensity of competition among forest tree seedlings is poorly understood, but has important ramifications for their recruitment and for the maintenance of species diversity. Intense competition among seedlings could allow competitively dominant species to exclude subordinate species. Alternatively, the low density and small stature of forest tree seedlings could preclude intense interseedling competition. In this case, other processes, such as size-asymmetric competition with adults, interactions with consumers, or neutral dynamics would prevail as those structuring the forest understory. We tested the intensity of, and potential for, intraspecific competition among tree seedlings of three species (Brosimum alicastrum, Matisia cordata, and Pouteria reticulata) in two Neotropical rain forests. We reduced stem densities by up to 90 percent and monitored individual growth and survival rates for up to 24 mo. Individual growth and survival rates were generally unrelated to stem density. Contrary to the predicted behavior of intensely competing plant populations, the distribution of individual heights did not become more left-skewed with time for any species, regardless of plot density; i.e., excesses of short, suppressed individuals did not accumulate in high-density plots. We further measured the overlap of zones of influence (ZOIs) to assess the potential for resource competition. Seedling ZOIs overlapped only slightly in extremely dense monodominant plots, and even less in ambient-density plots of mixed composition. Our results thus suggest that interseedling competition was weak. Given the low density of tree seedlings in Neotropical forests, we infer that resource competition among seedlings may be irrelevant to their recruitment. |
Address |
[Paine, C. E. Timothy; Harms, Kyle E.] Louisiana State Univ, Dept Biol Sci, Baton Rouge, LA 70803 USA, Email: cetpaine@gmail.com |
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BLACKWELL PUBLISHING |
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ISSN |
0006-3606 |
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Notes |
ISI:000257717500006 |
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no |
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EcoFoG @ eric.marcon @ |
Serial |
134 |
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