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Author Dejean, Alain ; Petitclerc, Frédéric ; Azémar, Frédéric ; Rossi, Vivien
Title Nutrient provisioning of its host myrmecophytic tree by a temporary social parasite of a plant-ant Type Journal Article
Year 2021 Publication Biological Journal of the Linnean Society Abbreviated Journal
Volume 133 Issue 3 Pages 744-750
Keywords
Abstract One of the most advanced ant–plant mutualisms is represented by myrmecophytes sheltering colonies of some plant-ant species in hollow structures called domatia. In turn, the myrmecophytes benefit from biotic protection and sometimes nutrient provisioning (myrmecotrophy). Furthermore, over the course of evolution, some ant species have become social parasites of others. In this general context, we studied the relationship between its host trees and Azteca andreae (Dolichoderinae), a temporary social parasite of the plant-ant Azteca ovaticeps, and, as such, obligatorily associated with myrmecophytic Cecropia obtusa trees (Urticaceae). A first experiment showed that the δ15N values of the young leaves of Cecropia sheltering a mature A. andreae colony were very similar to those for trees sheltering Azteca alfari or A. ovaticeps, two typical Cecropia mutualists for which myrmecotrophy is known. In a second experiment, by injecting a 15N-labelled glycine solution into locusts given as prey to A. andreae colonies, we triggered an increase in δ15N in the young leaves of their host Cecropia. Thus, 15N passed from the prey to the host trees, explaining the outcomes of the first experiment. We discuss these results in light of the notion of ‘by-product benefits’.
Address
Corporate Author Thesis
Publisher (down) Oxford Academy Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number EcoFoG @ webmaster @ Serial 1009
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Author Herault, B.; Honnay, O.
Title Using life-history traits to achieve a functional classification of habitats Type Journal Article
Year 2007 Publication Applied Vegetation Science Abbreviated Journal Appl. Veg. Sci.
Volume 10 Issue 1 Pages 73-80
Keywords forest connectivity; functional group; habitat typology; land-use history; riverine forest; species functional unity
Abstract Question: To establish a habitat classification based on functional group co-occurrence that may help the drawing up of conservation plans. Location: Riverine forest fragments in the Grand-duche de Luxembourg, Europe. Methods: Forest fragments were surveyed for their abundance of vascular plants. These were clustered into emergent groups according to 14 life-traits related to plant dispersal, establishment and persistence. Forest fragments were classified according to similar distribution of the identified emergent groups. Environmental factors were related to the emergent group richness in each forest type using generalized linear models. Results: Contrary to former species centred classifications, only two groups of forests, each with clearly different emergent group composition and conservation requirements, were detected: (1) swamp forests characterized by anemogamous perennials, annuals and hydrochorous perennials and (2) moist forests characterized by barochorous perennials, small geophytes and zoochorous phanerophytes. From a conservation point of view, priority should be given to large swamp forest with intact flooding regimes. This is in accordance with the high wind and water dispersal capacities of their typical emergent groups. For the moist forests, conservation priorities should be high forest connectivity and historical continuity since dispersal and establishment of their characteristic emergent groups are highly limited. Conclusions: The described methodology, situated at an intermediate integration level between the individual species and whole community descriptors, takes advantage of both conservation plans built for single species and the synthetic power of broad ecological measures.
Address Univ Liege, Dept Environm Sci & Management, B-6700 Arlon, Belgium, Email: bruno.herault@cirad.fr
Corporate Author Thesis
Publisher (down) OPULUS PRESS UPPSALA AB Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1402-2001 ISBN Medium
Area Expedition Conference
Notes ISI:000245934700009 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 218
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Author Kenne, M.; Feneron, R.; Djieto-Lordon, C.; Malherbe, M.C.; Tindo, M.; Ngnegueu, P.R.; Dejean, A.
Title Nesting and foraging habits in the arboreal ant Atopomyrmex mocquerysi ANDRE, 1889 (Hymenoptera: Formicidae: Myrmicinae) Type Journal Article
Year 2009 Publication Myrmecological News Abbreviated Journal Myrmecol. News
Volume 12 Issue Pages 109-115
Keywords Cameroon; wood-excavating ant; nest site selection; pest ant; predatory behavior; rhythm of activity; life history
Abstract Atopomyrmex mocquerysi ANDRE, 1889 is a West-Central African wood-excavating myrmicine species whose colonies construct galleries in the main live branches of their host trees, causing the distal parts of these branches to dry out. In southeastern Cameroon, this species was mainly found in woody savannahs that are burned annually. It was also present in the canopy of a secondary forest, but was relatively rare on trees growing along forest edges and entirely absent from the canopy of an old-growth forest. It was absent from oil palm and coffee tree plantations, rare on cocoa trees. present on 0.2% to 5.3% of the avocado, guava, mango and Citrus spp. trees monitored, and frequent on safoo trees (12.4%). A fire in a mango plantation seems to have favored its presence. The colonies generally exploit Aleyrodidae, Aphididae, Coccidae, and Stictococcidae. Workers forage for prey diurnally, mostly on the ground. Their predatory behavior is characterized by detection through contact. Workers recruit nestmates at short-range (within range of an alarm pheromone), rarely at long-range, after which they spread-eagle the prey and immediately cut it up on the spot. Individual workers retrieve the prey pieces. Unlike other territorially-dominant arboreal ants, A. mocquerysi is a threat to host trees because. in addition to being a wood-excavating species, its workers only slightly protect the foliage of their host tree from herbivorous insects since they mostly hunt on the ground.
Address [Kenne, Martin; Tindo, Maurice] Univ Douala, Fac Sci, Dept Biol Organismes Anim, Douala, Cameroon, Email: medoum68@yahoo.fr
Corporate Author Thesis
Publisher (down) OESTERREICHISCHE GESELL ENTOMOFAUNISTIK, C/O NATURHISTOR MUSEUM WIEN Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1994-4136 ISBN Medium
Area Expedition Conference
Notes ISI:000271357700012 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 97
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Author Orivel, J.; Leroy, C.
Title The diversity and ecology of ant gardens (Hymenoptera: Formicidae; Spermatophyta: Angiospermae) Type Journal Article
Year 2011 Publication Myrmecological News Abbreviated Journal Myrmecol. News
Volume 14 Issue Pages 73-85
Keywords Ant-plant interactions; epiphytes; mutualisms; Neotropics; Paleotropics; phytotelm; parabiosis; seed dispersal; review
Abstract Mutualistic interactions between ants and plants are important features of many ecosystems, and they can be divided into three main categories: dispersal and protective mutualisms and myrmecotrophy. In both the Neotropics and the Southeastern Asian Paleotropics, ant gardens (AGs), a particular type of ant-plant interaction, are frequent. To initiate AGs, ants integrate the seeds of certain epiphyte species into the carton of their nest. The development of the plants leads to the formation of a cluster of epiphytes rooted in the carton. They have been defined as one of the most complex associations between ants and plants known because of the plurispecific, but also specialized nature of the association involving several phylogenetically-distant ant and plant species. The aim of this review is to provide a synthesis of the diversity and ecology of AGs, including the outcomes experienced by the partners in the interaction and the direct and indirect impacts ant-garden ants have on the plant and arthropod communities.
Address [Orivel, Jerome; Leroy, Celine] CNRS, UMR Ecol Forets Guyane, Kourou 97379, French Guiana, Email: jerome.orivel@ecofog.gf
Corporate Author Thesis
Publisher (down) OESTERREICHISCHE GESELL ENTOMOFAUNISTIK, C/O NATURHISTOR MUSEUM WIEN Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1994-4136 ISBN Medium
Area Expedition Conference
Notes ISI:000286844100009 Approved no
Call Number EcoFoG @ webmaster @ Serial 292
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Author Ruelle, J.; Yamamoto, H.; Thibaut, B.
Title Growth Stresses and Cellulose Structural Parameters in Tension and Normal Wood from Three Tropical Rainforest Angiosperm Species Type Journal Article
Year 2007 Publication BioResources Abbreviated Journal BioResources
Volume 2 Issue 2 Pages 235-251
Keywords Cellulose; Microfibril angle; Crystallite size; Tension wood; Tropical rainforest; Growth stresses
Abstract Few studies have been conducted about relation between cellulose parameters and biomechanical properties of wood in tropical angiosperms species. For this purpose, on 13 trees from 3 species of French Guyana tropical rainforest in a clear active process of restoring verticality, i) growth strains were measured in situ in order to determine the occurrence of tension wood within samples and ii) cellulose structural parameters were estimated on all the samples using X-ray diffraction method. Crystallite size was estimated from the full-width at half-maximum of the Miller index (002) arc diffraction and angle T was measured following Cave's method. Relationships between these parameters and growth stresses were good and the variations between normal and tension wood were significant, i. e. a lower angle T and a larger crystallite size in tension wood. In order to have a good estimation of the microfibril angle in the main layer of the secondary wall for each species, an experimental calibration was done between angle T and microfibril angle observed with scanning electron microscopy.
Address [Ruelle, Julien; Thibaut, Bernard] UMR EcoFoG, Kourou 97387, Guyana, Email: ruelle_j@kourou.cirad.fr
Corporate Author Thesis
Publisher (down) NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1930-2126 ISBN Medium
Area Expedition Conference
Notes ISI:000263689300009 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 122
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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
Volume 44 Issue 3 Pages 440-452
Keywords
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.
Address
Corporate Author Thesis
Publisher (down) Nordic Society OIKOS Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number EcoFoG @ webmaster @ Serial 1013
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Author Vleminckx, Jason ; Fortunel, Claire ; Valverde-Barrantes, Oscar ; Paine, C.E. Timothy ; Engel, Julien ; Petronelli, Pascal ; Dourdain, Aurélie K. ; Guevara, Juan ; Béroujon, Solène ; Baraloto, Christophier
Title Resolving whole-plant economics from leaf, stem and root traits of 1467 Amazonian tree species Type Journal Article
Year 2021 Publication Oikos Abbreviated Journal
Volume 130 Issue 7 Pages 1193-1208
Keywords
Abstract It remains unclear how evolutionary and ecological processes have shaped the wide variety of plant life strategies, especially in highly diverse ecosystems like tropical forests. Some evidence suggests that species have diversified across a gradient of ecological strategies, with different plant tissues converging to optimize resource use across environmental gradients. Alternative hypotheses propose that species have diversified following independent selection on different tissues, resulting in a decoupling of trait syndromes across organs. To shed light on the subject, we assembled an unprecedented dataset combining 19 leaf, stem and root traits for 1467 tropical tree species inventoried across 71 0.1-ha plots spanning broad environmental gradients in French Guiana. Nearly 50% of the overall functional heterogeneity was expressed along four orthogonal dimensions, after accounting for phylogenetic dependences among species. The first dimension related to fine root functioning, while the second and third dimensions depicted two decoupled leaf economics spectra, and the fourth dimension encompassed a wood economics spectrum. Traits involved in orthogonal functional strategies, five leaf traits in particular but also trunk bark thickness, were consistently associated with a same gradient of soil texture and nutrient availability. Root traits did not show any significant association with edaphic variation, possibly because of the prevailing influence of other factors (mycorrhizal symbiosis, phylogenetic constraints). Our study emphasises the existence of multiple functional dimensions that allow tropical tree species to optimize their performance in a given environment, bringing new insights into the debate around the presence of a whole plant economic spectrum in tropical forest tree communities. It also emphasizes the key role that soil heterogeneity plays in shaping tree species assembly. The extent to which different organs are decoupled and respond to environmental gradients may also help to improve our predictions of species distribution changes in responses to habitat modification and environmental changes.
Address
Corporate Author Thesis
Publisher (down) Nordic Society OIKOS Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number EcoFoG @ webmaster @ Serial 1030
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Author Peguero, G.; Sardans, J.; Asensio, D.; Fernández-Martínez, M.; Gargallo-Garriga, A.; Grau, O.; Llusià, J.; Margalef, O.; Márquez, L.; Ogaya, R.; Urbina, I.; Courtois, E.A.; Stahl, C.; Van Langenhove, L.; Verryckt, L.T.; Richter, A.; Janssens, I.A.; Peñuelas, J.
Title Nutrient scarcity strengthens soil fauna control over leaf litter decomposition in tropical rainforests Type Journal Article
Year 2019 Publication Proceedings. Biological sciences Abbreviated Journal Proc. Biol. Sci.
Volume 286 Issue 1910 Pages 20191300
Keywords biogeochemistry; extracellular enzyme activity; litter decomposition; nutrients; soil fauna
Abstract Soil fauna is a key control of the decomposition rate of leaf litter, yet its interactions with litter quality and the soil environment remain elusive. We conducted a litter decomposition experiment across different topographic levels within the landscape replicated in two rainforest sites providing natural gradients in soil fertility to test the hypothesis that low nutrient availability in litter and soil increases the strength of fauna control over litter decomposition. We crossed these data with a large dataset of 44 variables characterizing the biotic and abiotic microenvironment of each sampling point and found that microbe-driven carbon (C) and nitrogen (N) losses from leaf litter were 10.1 and 17.9% lower, respectively, in the nutrient-poorest site, but this among-site difference was equalized when meso- and macrofauna had access to the litterbags. Further, on average, soil fauna enhanced the rate of litter decomposition by 22.6%, and this contribution consistently increased as nutrient availability in the microenvironment declined. Our results indicate that nutrient scarcity increases the importance of soil fauna on C and N cycling in tropical rainforests. Further, soil fauna is able to equalize differences in microbial decomposition potential, thus buffering to a remarkable extent nutrient shortages at an ecosystem level.
Address Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, 1090, Austria
Corporate Author Thesis
Publisher (down) NLM (Medline) Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 14712954 (Issn) ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number EcoFoG @ webmaster @ Serial 884
Permanent link to this record
 

 
Author Ciminera, M.; Auger-Rozenberg, M.-A.; Caron, H.; Herrera, M.; Scotti-Saintagne, C.; Scotti, I.; Tysklind, N.; Roques, A.
Title Genetic Variation and Differentiation of Hylesia metabus (Lepidoptera: Saturniidae): Moths of Public Health Importance in French Guiana and in Venezuela Type Journal Article
Year 2019 Publication Journal of medical entomology Abbreviated Journal J. Med. Entomol.
Volume 56 Issue 1 Pages 137-148
Keywords
Abstract Hylesia moths impact human health in South America, inducing epidemic outbreaks of lepidopterism, a puriginous dermatitis caused by the urticating properties of females' abdominal setae. The classification of the Hylesia genus is complex, owing to its high diversity in Amazonia, high intraspecific morphological variance, and lack of interspecific diagnostic traits which may hide cryptic species. Outbreaks of Hylesia metabus have been considered responsible for the intense outbreaks of lepidopterism in Venezuela and French Guiana since the C20, however, little is known about genetic variability throughout the species range, which is instrumental for establishing control strategies on H. metabus. Seven microsatellites and mitochondrial gene markers were analyzed from Hylesia moths collected from two major lepidopterism outbreak South American regions. The mitochondrial gene sequences contained significant genetic variation, revealing a single, widespread, polymorphic species with distinct clusters, possibly corresponding to populations evolving in isolation. The microsatellite markers validated the mitochondrial results, and suggest the presence of three populations: one in Venezuela, and two in French Guiana. All moths sampled during outbreak events in French Guiana were assigned to a single coastal population. The causes and implications of this finding require further research.
Address INRA, Unité de Recherche Ecologie des forêts méditerranéennes, Avignon, UR629, France
Corporate Author Thesis
Publisher (down) NLM (Medline) Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 19382928 (Issn) ISBN Medium
Area Expedition Conference
Notes Export Date: 1 February 2019 Approved no
Call Number EcoFoG @ webmaster @ Serial 857
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Author Soong, J.L.; Janssens, I.A.; Grau, O.; Margalef, O.; Stahl, C.; Van Langenhove, L.; Urbina, I.; Chave, J.; Dourdain, A.; Ferry, B.; Freycon, V.; Herault, B.; Sardans, J.; Peñuelas, J.; Verbruggen, E.
Title Soil properties explain tree growth and mortality, but not biomass, across phosphorus-depleted tropical forests Type Journal Article
Year 2020 Publication Scientific reports Abbreviated Journal Sci Rep
Volume 10 Issue 2302 Pages
Keywords
Abstract We observed strong positive relationships between soil properties and forest dynamics of growth and mortality across twelve primary lowland tropical forests in a phosphorus-poor region of the Guiana Shield. Average tree growth (diameter at breast height) increased from 0.81 to 2.1 mm yr-1 along a soil texture gradient from 0 to 67% clay, and increasing metal-oxide content. Soil organic carbon stocks in the top 30 cm ranged from 30 to 118 tons C ha-1, phosphorus content ranged from 7 to 600 mg kg-1 soil, and the relative abundance of arbuscular mycorrhizal fungi ranged from 0 to 50%, all positively correlating with soil clay, and iron and aluminum oxide and hydroxide content. In contrast, already low extractable phosphorus (Bray P) content decreased from 4.4 to <0.02 mg kg-1 in soil with increasing clay content. A greater prevalence of arbuscular mycorrhizal fungi in more clayey forests that had higher tree growth and mortality, but not biomass, indicates that despite the greater investment in nutrient uptake required, soils with higher clay content may actually serve to sustain high tree growth in tropical forests by avoiding phosphorus losses from the ecosystem. Our study demonstrates how variation in soil properties that retain carbon and nutrients can help to explain variation in tropical forest growth and mortality, but not biomass, by requiring niche specialization and contributing to biogeochemical diversification across this region.
Address Institut National Polytechnique Félix Houphouët-Boigny, Ivory CoastYamoussoukro, Cote d'Ivoire
Corporate Author Thesis
Publisher (down) NLM (Medline) Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 20452322 (Issn) ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number EcoFoG @ webmaster @ Serial 916
Permanent link to this record