| Records |
| Author |
Phillips, O.L.; van der Heijden, G.; Lewis, S.L.; Lopez-Gonzalez, G.; Aragao, L.E.O.C.; Lloyd, J.; Malhi, Y.; Monteagudo, A.; Almeida, S.; Davila, E.A.; Amaral, I.; Andelman, S.; Andrade, A.; Arroyo, L.; Aymard, G.; Baker, T.R.; Blanc, L.; Bonal, D.; de Oliveira, A.C.A.; Chao, K.J.; Cardozo, N.D.; da Costa, L.; Feldpausch, T.R.; Fisher, J.B.; Fyllas, N.M.; Freitas, M.A.; Galbraith, D.; Gloor, E.; Higuchi, N.; Honorio, E.; Jimenez, E.; Keeling, H.; Killeen, T.J.; Lovett, J.C.; Meir, P.; Mendoza, C.; Morel, A.; Vargas, P.N.; Patino, S.; Peh, K.S.H.; Cruz, A.P.; Prieto, A.; Quesada, C.A.; Ramirez, F.; Ramirez, H.; Rudas, A.; Salamao, R.; Schwarz, M.; Silva, J.; Silveira, M.; Slik, J.W.F.; Sonke, B.; Thomas, A.S.; Stropp, J.; Taplin, J.R.D.; Vasquez, R.; Vilanova, E. |
| Title |
Drought-mortality relationships for tropical forests |
Type |
Journal Article |
| Year |
2010 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol. |
| Volume |
187 |
Issue |
3 |
Pages |
631-646 |
| Keywords |
Amazon; Borneo; drought; lags mortality; RAINFOR; trees; tropics |
| Abstract |
The rich ecology of tropical forests is intimately tied to their moisture status. Multi-site syntheses can provide a macro-scale view of these linkages and their susceptibility to changing climates. Here, we report pan-tropical and regional-scale analyses of tree vulnerability to drought. We assembled available data on tropical forest tree stem mortality before, during, and after recent drought events, from 119 monitoring plots in 10 countries concentrated in Amazonia and Borneo. In most sites, larger trees are disproportionately at risk. At least within Amazonia, low wood density trees are also at greater risk of drought-associated mortality, independent of size. For comparable drought intensities, trees in Borneo are more vulnerable than trees in the Amazon. There is some evidence for lagged impacts of drought, with mortality rates remaining elevated 2 yr after the meteorological event is over. These findings indicate that repeated droughts would shift the functional composition of tropical forests toward smaller, denser-wooded trees. At very high drought intensities, the linear relationship between tree mortality and moisture stress apparently breaks down, suggesting the existence of moisture stress thresholds beyond which some tropical forests would suffer catastrophic tree mortality. |
| Address |
[Phillips, Oliver L.; van der Heijden, Geertje; Lewis, Simon L.; Lopez-Gonzalez, Gabriela; Lloyd, Jon; Baker, Tim R.; Chao, Kuo-Jung; Feldpausch, Ted R.; Fyllas, Nikolaos M.; Gloor, Emanuel; Honorio, Euridice; Keeling, Helen; Quesada, Carlos A.; Schwarz, Michael] Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England, Email: o.phillips@leeds.ac.uk |
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WILEY-BLACKWELL PUBLISHING, INC |
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0028-646X |
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| Notes |
ISI:000280122500028 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
50 |
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| Author |
Leroy, C.; Corbara, B.; Dejean, A.; Cereghino, R. |
| Title |
Ants mediate foliar structure and nitrogen acquisition in a tank-bromeliad |
Type |
Journal Article |
| Year |
2009 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol. |
| Volume |
183 |
Issue |
4 |
Pages |
1124-1133 |
| Keywords |
Aechmea mertensii; antgardens; Camponotus femoratus; foliar structure; delta N-15; Pachycondyla goeldii; phytotelmata contents |
| Abstract |
Aechmea mertensii is a tank-bromeliad that roots on ant-gardens initiated by the ants Camponotus femoratus and Pachycondyla goeldii. Its leaves form compartments acting as phytotelmata that hold rainwater and provide habitats for invertebrates. In this article, we aimed to determine whether the association with either C. femoratus or P. goeldii influenced the vegetative traits of A. mertensii, invertebrate diversity and nutrient assimilation by the leaves. Transmitted light, vegetative traits and phytotelmata contents were compared between the two A. mertensii ant-gardens. Camponotus femoratus colonized partially shaded areas, whereas P. goeldii colonized exposed areas. The bromeliads' rosettes had a large canopy (C. femoratus ant-gardens), or were smaller and amphora shaped (P. goeldii ant-gardens). There were significant differences in leaf anatomy, as shaded leaves were thicker than exposed leaves. The mean volumes of water, fine particulate organic matter and detritus in C. femoratus-associated bromeliads were three to five times higher than in P. goeldii-associated bromeliads. Moreover, the highest invertebrate diversity and leaf delta N-15 values were found in C. femoratus-associated bromeliads. This study enhances our understanding of the dynamics of biodiversity, and shows how ant-plant interactions can have trophic consequences and thus influence the architecture of the interacting plant via a complex feedback loop. |
| Address |
[Leroy, Celine; Dejean, Alain] EcoFoG, CNRS, UMR 8172, F-97379 Kourou, France, Email: Celine.Leroy@ecofog.gf |
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WILEY-BLACKWELL PUBLISHING, INC |
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0028-646X |
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| Notes |
ISI:000268855300020 |
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no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
106 |
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| Author |
Hattenschwiler, S.; Aeschlimann, B.; Couteaux, M.M.; Roy, J.; Bonal, D. |
| Title |
High variation in foliage and leaf litter chemistry among 45 tree species of a neotropical rainforest community |
Type |
Journal Article |
| Year |
2008 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol. |
| Volume |
179 |
Issue |
1 |
Pages |
165-175 |
| Keywords |
French Guiana; interspecific and intraspecific variation; leaf litter traits; neotropical rainforest; nitrogen; nutrient resorption; phosphorus; stoichiometry |
| Abstract |
Distinct ecosystem level carbon : nitrogen : phosphorus (C : N : P) stoichiometries in forest foliage have been suggested to reflect ecosystem-scale selection for physiological strategies in plant nutrient use. Here, this hypothesis was explored in a nutrient-poor lowland rainforest in French Guiana. Variation in C, N and P concentrations was evaluated in leaf litter and foliage from neighbour trees of 45 different species, and the litter concentrations of major C fractions were also measured. Litter C ranged from 45.3 to 52.4%, litter N varied threefold (0.68-2.01%), and litter P varied seven-fold (0.009-0.062%) among species. Compared with foliage, mean litter N and P concentrations decreased by 30% and 65%, respectively. Accordingly, the range in mass-based N : P shifted from 14 to 55 in foliage to 26 to 105 in litter. Resorption proficiencies indicated maximum P withdrawal in most species, but with a substantial increase in variation in litter P compared with foliage. These data suggest that constrained ecosystem-level C : N : P ratios do not preclude the evolution of highly diversified strategies of nutrient use and conservation among tropical rainforest tree species. The resulting large variation in litter quality will influence stoichiometric constraints within the decomposer food web, with potentially far-ranging consequences on nutrient dynamics and plant-soil feedbacks. |
| Address |
[Haettenschwiler, Stephan; Aeschlimann, Beat; Couteaux, Marie-Madeleine; Roy, Jacques] CEFE, CNRS, F-34293 Montpellier 5, France, Email: stephan.hattenschwiler@cefe.cnrs.fr |
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BLACKWELL PUBLISHING |
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0028-646X |
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| Notes |
ISI:000256412500017 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
139 |
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| Author |
Christensen-Dalsgaard, K.K.; Fournier, M.; Ennos, A.R.; Barfod, A.S. |
| Title |
Changes in vessel anatomy in response to mechanical loading in six species of tropical trees |
Type |
Journal Article |
| Year |
2007 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol. |
| Volume |
176 |
Issue |
3 |
Pages |
610-622 |
| Keywords |
hydraulic architecture; hydraulic-mechanical trade-off; mechanical adaptation; rooting morphology; tropical trees; vascular anatomy |
| Abstract |
It is well known that trees adapt their supportive tissues to changes in loading conditions, yet little is known about how the vascular anatomy is modified in this process. We investigated this by comparing more and less mechanically loaded sections in six species of tropical trees with two different rooting morphologies. We measured the strain, vessel size, frequency and area fraction and from this calculated the specific conductivity, then measured the conductivity, modulus of elasticity and yield stress. The smallest vessels and the lowest vessel frequency were found in the parts of the trees subjected to the greatest stresses or strains. The specific conductivity varied up to two orders of magnitude between mechanically loaded and mechanically unimportant parts of the root system. A trade-off between conductivity and stiffness or strength was revealed, which suggests that anatomical alterations occur in response to mechanical strain. By contrast, between-tree comparisons showed that average anatomical features for the whole tree seemed more closely related to their ecological strategy. |
| Address |
Univ Manchester, Fac Life Sci, Manchester M60 1QD, Lancs, England, Email: karen@cd-mail.dk |
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BLACKWELL PUBLISHING |
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Edition |
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0028-646X |
ISBN |
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| Notes |
ISI:000250275000013 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
156 |
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| Author |
de Grandcourt, A.; Epron, D.; Montpied, P.; Louisanna, E.; Bereau, M.; Garbaye, J.; Guehl, J.M. |
| Title |
Contrasting responses to mycorrhizal inoculation and phosphorus availability in seedlings of two tropical rainforest tree species |
Type |
Journal Article |
| Year |
2004 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol. |
| Volume |
161 |
Issue |
3 |
Pages |
865-875 |
| Keywords |
phosphorus; growth; efficiency; Paris-type arbuscular mycorrhizas; tropical rainforest; seedlings; Dicorynia guianensis; Eperua falcata |
| Abstract |
This work aimed at understanding the role of mycorrhizal status in phosphorus efficiency of tree seedlings in the tropical rainforest of French Guyana. Mycorrhizal colonization, growth, phosphorus content, net photosynthesis and root respiration were determined on three occasions during a 9-month growth period for seedlings of two co-occurring species (Dicorynia guianensis and Eperua falcata) grown at three soil phosphorus concentrations, with or without inoculation with arbuscular mycorrhizas. Seedlings of both species were unable to absorb phosphorus in the absence of mycorrhizal association. Mycorrhizal seedlings exhibited coils that are specific of Paris-type mycorrhizae. Both species benefited from the mycorrhizal symbiosis in terms of phosphorus acquisition but the growth of E. falcata seedlings was unresponsive to this mycorrhizal improvement of phosphorus status, probably because of the combination of high seed mass and P reserves, with low growth rate. The two species belong to two different functional groups regarding phosphorus acquisition, D. guianensis being an obligate mycotrophic species. |
| Address |
Univ Franche Comte, Lab Biol & Ecophysiol, F-25211 Montbeliard, France, Email: daniel.epron@scbiol.uhp-nancy.fr |
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BLACKWELL PUBLISHING LTD |
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Edition |
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0028-646X |
ISBN |
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Medium |
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Conference |
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| Notes |
ISI:000188646500022 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
239 |
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| Author |
Haettenschwiler, S.; Coq, S.; Barantal, S.; Handa, I.T. |
| Title |
Leaf traits and decomposition in tropical rainforests: revisiting some commonly held views and towards a new hypothesis |
Type |
Journal Article |
| Year |
2011 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol. |
| Volume |
189 |
Issue |
4 |
Pages |
950-965 |
| Keywords |
energy starvation; French Guiana; litter quality; mycorrhizas; nutrient cycling; nutrient limitation; phosphorus; soil fauna |
| Abstract |
Proper estimates of decomposition are essential for tropical forests, given their key role in the global carbon (C) cycle. However, the current paradigm for litter decomposition is insufficient to account for recent observations and may limit model predictions for highly diverse tropical ecosystems. In light of recent findings from a nutrient-poor Amazonian rainforest, we revisit the commonly held views that: litter traits are a mere legacy of live leaf traits; nitrogen (N) and lignin are the key litter traits controlling decomposition; and favourable climatic conditions result in rapid decomposition in tropical forests. Substantial interspecific variation in litter phosphorus (P) was found to be unrelated to variation in green leaves. Litter nutrients explained no variation in decomposition, which instead was controlled primarily by nonlignin litter C compounds at low concentrations with important soil fauna effects. Despite near-optimal climatic conditions, tropical litter decomposition proceeded more slowly than in a climatically less favourable temperate forest. We suggest that slow decomposition in the studied rainforest results from a syndrome of poor litter C quality beyond a simple lignin control, enforcing energy starvation of decomposers. We hypothesize that the litter trait syndrome in nutrient-poor tropical rainforests may have evolved to increase plant access to limiting nutrients via mycorrhizal associations. |
| Address |
[Haettenschwiler, Stephan; Coq, Sylvain; Barantal, Sandra; Handa, Ira Tanya] CNRS, CEFE, F-34293 Montpellier 5, France, Email: stephan.hattenschwiler@cefe.cnrs.fr |
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Wiley-Blackwell |
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0028-646x |
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Conference |
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| Notes |
ISI:000286940500009 |
Approved |
no |
| Call Number |
EcoFoG @ webmaster @ |
Serial |
296 |
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| Author |
Clair, B.; Ghislain, B.; Prunier, J.; Lehnebach, R.; Beauchene, J.; Alméras, T. |
| Title |
Mechanical contribution of secondary phloem to postural control in trees: the bark side of the force |
Type |
Journal Article |
| Year |
2019 |
Publication |
New Phytologist |
Abbreviated Journal |
New Phytol |
| Volume |
221 |
Issue |
1 |
Pages |
209-217 |
| Keywords |
bark; Malvaceae; maturation stress; secondary phloem; tree biomechanics |
| Abstract |
Summary To grow straight, plants need a motor system that controls posture by generating forces to offset gravity. This motor function in trees was long thought to be only controlled by internal forces induced in wood. Here we provide evidence that bark is involved in the generation of mechanical stresses in several tree species. Saplings of nine tropical species were grown tilted and staked in a shadehouse and the change in curvature of the stem was measured after releasing from the pole and after removing the bark. This first experiment evidenced the contribution of bark in the up-righting movement of tree stems. Combined mechanical measurements of released strains on adult trees and microstructural observations in both transverse and longitudinal/tangential plane enabled us to identify the mechanism responsible for the development of asymmetric mechanical stress in the bark of stems of these species. This mechanism does not result from cell wall maturation like in wood, or from the direct action of turgor pressure like in unlignified organs, but is the consequence of the interaction between wood radial pressure and a smartly organized trellis structure in the inner bark. |
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John Wiley & Sons, Ltd (10.1111) |
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0028-646x |
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| Notes |
doi: 10.1111/nph.15375 |
Approved |
no |
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EcoFoG @ webmaster @ |
Serial |
853 |
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Steidinger, B.S.; Crowther, T.W.; Liang, J.; Van Nuland, M.E.; Werner, G.D.A.; Reich, P.B.; Nabuurs, G.; de-Miguel, S.; Zhou, M.; Picard, N.; Herault, B.; Zhao, X.; Zhang, C.; Routh, D.; Peay, K.G.; Abegg, M.; Adou Yao, C.Y.; Alberti, G.; Almeyda Zambrano, A.; Alvarez-Davila, E.; Alvarez-Loayza, P.; Alves, L.F.; Ammer, C.; Antón-Fernández, C.; Araujo-Murakami, A.; Arroyo, L.; Avitabile, V.; Aymard, G.; Baker, T.; Bałazy, R.; Banki, O.; Barroso, J.; Bastian, M.; Bastin, J.-F.; Birigazzi, L.; Birnbaum, P.; Bitariho, R.; Boeckx, P.; Bongers, F.; Bouriaud, O.; Brancalion, P.H.S.; Brandl, S.; Brearley, F.Q.; Brienen, R.; Broadbent, E.; Bruelheide, H.; Bussotti, F.; Cazzolla Gatti, R.; Cesar, R.; Cesljar, G.; Chazdon, R.; Chen, H.Y.H.; Chisholm, C.; Cienciala, E.; Clark, C.J.; Clark, D.; Colletta, G.; Condit, R.; Coomes, D.; Cornejo Valverde, F.; Corral-Rivas, J.J.; Crim, P.; Cumming, J.; Dayanandan, S.; de Gasper, A.L.; Decuyper, M.; Derroire, G.; DeVries, B.; Djordjevic, I.; Iêda, A.; Dourdain, A.; Obiang, N.L.E.; Enquist, B.; Eyre, T.; Fandohan, A.B.; Fayle, T.M.; Feldpausch, T.R.; Finér, L.; Fischer, M.; Fletcher, C.; Fridman, J.; Frizzera, L.; Gamarra, J.G.P.; Gianelle, D.; Glick, H.B.; Harris, D.; Hector, A.; Hemp, A.; Hengeveld, G.; Herbohn, J.; Herold, M.; Hillers, A.; Honorio Coronado, E.N.; Huber, M.; Hui, C.; Cho, H.; Ibanez, T.; Jung, I.; Imai, N.; Jagodzinski, A.M.; Jaroszewicz, B.; Johannsen, V.; Joly, C.A.; Jucker, T.; Karminov, V.; Kartawinata, K.; Kearsley, E.; Kenfack, D.; Kennard, D.; Kepfer-Rojas, S.; Keppel, G.; Khan, M.L.; Killeen, T.; Kim, H.S.; Kitayama, K.; Köhl, M.; Korjus, H.; Kraxner, F.; Laarmann, D.; Lang, M.; Lewis, S.; Lu, H.; Lukina, N.; Maitner, B.; Malhi, Y.; Marcon, E.; Marimon, B.S.; Marimon-Junior, B.H.; Marshall, A.R.; Martin, E.; Martynenko, O.; Meave, J.A.; Melo-Cruz, O.; Mendoza, C.; Merow, C.; Monteagudo Mendoza, A.; Moreno, V.; Mukul, S.A.; Mundhenk, P.; Nava-Miranda, M.G.; Neill, D.; Neldner, V.; Nevenic, R.; Ngugi, M.; Niklaus, P.; Oleksyn, J.; Ontikov, P.; Ortiz-Malavasi, E.; Pan, Y.; Paquette, A.; Parada-Gutierrez, A.; Parfenova, E.; Park, M.; Parren, M.; Parthasarathy, N.; Peri, P.L.; Pfautsch, S.; Phillips, O.; Piedade, M.T.; Piotto, D.; Pitman, N.C.A.; Polo, I.; Poorter, L.; Poulsen, A.D.; Poulsen, J.R.; Pretzsch, H.; Ramirez Arevalo, F.; Restrepo-Correa, Z.; Rodeghiero, M.; Rolim, S.; Roopsind, A.; Rovero, F.; Rutishauser, E.; Saikia, P.; Saner, P.; Schall, P.; Schelhaas, M.-J.; Schepaschenko, D.; Scherer-Lorenzen, M.; Schmid, B.; Schöngart, J.; Searle, E.; Seben, V.; Serra-Diaz, J.M.; Salas-Eljatib, C.; Sheil, D.; Shvidenko, A.; Silva-Espejo, J.; Silveira, M.; Singh, J.; Sist, P.; Slik, F.; Sonké, B.; Souza, A.F.; Stereńczak, K.; Svenning, J.-C.; Svoboda, M.; Targhetta, N.; Tchebakova, N.; Steege, H.; Thomas, R.; Tikhonova, E.; Umunay, P.; Usoltsev, V.; Valladares, F.; van der Plas, F.; Van Do, T.; Vasquez Martinez, R.; Verbeeck, H.; Viana, H.; Vieira, S.; von Gadow, K.; Wang, H.-F.; Watson, J.; Westerlund, B.; Wiser, S.; Wittmann, F.; Wortel, V.; Zagt, R.; Zawila-Niedzwiecki, T.; Zhu, Z.-X.; Zo-Bi, I.C.; GFBI consortium |
| Title |
Climatic controls of decomposition drive the global biogeography of forest-tree symbioses |
Type |
Journal Article |
| Year |
2019 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
569 |
Issue |
7756 |
Pages |
404-408 |
| Keywords |
Fungi |
| Abstract |
The identity of the dominant root-associated microbial symbionts in a forest determines the ability of trees to access limiting nutrients from atmospheric or soil pools 1,2 , sequester carbon 3,4 and withstand the effects of climate change 5,6 . Characterizing the global distribution of these symbioses and identifying the factors that control this distribution are thus integral to understanding the present and future functioning of forest ecosystems. Here we generate a spatially explicit global map of the symbiotic status of forests, using a database of over 1.1 million forest inventory plots that collectively contain over 28,000 tree species. Our analyses indicate that climate variables—in particular, climatically controlled variation in the rate of decomposition—are the primary drivers of the global distribution of major symbioses. We estimate that ectomycorrhizal trees, which represent only 2% of all plant species 7 , constitute approximately 60% of tree stems on Earth. Ectomycorrhizal symbiosis dominates forests in which seasonally cold and dry climates inhibit decomposition, and is the predominant form of symbiosis at high latitudes and elevation. By contrast, arbuscular mycorrhizal trees dominate in aseasonal, warm tropical forests, and occur with ectomycorrhizal trees in temperate biomes in which seasonally warm-and-wet climates enhance decomposition. Continental transitions between forests dominated by ectomycorrhizal or arbuscular mycorrhizal trees occur relatively abruptly along climate-driven decomposition gradients; these transitions are probably caused by positive feedback effects between plants and microorganisms. Symbiotic nitrogen fixers—which are insensitive to climatic controls on decomposition (compared with mycorrhizal fungi)—are most abundant in arid biomes with alkaline soils and high maximum temperatures. The climatically driven global symbiosis gradient that we document provides a spatially explicit quantitative understanding of microbial symbioses at the global scale, and demonstrates the critical role of microbial mutualisms in shaping the distribution of plant species. © 2019, The Author(s), under exclusive licence to Springer Nature Limited. |
| Address |
Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway |
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Nature Publishing Group |
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00280836 (Issn) |
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Approved |
no |
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EcoFoG @ webmaster @ |
Serial |
872 |
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| Author |
Dejean, A.; Corbara, B.; Azémar, F.; Carpenter, J.M. |
| Title |
When attempts at robbing prey turn fatal |
Type |
Journal Article |
| Year |
2012 |
Publication |
Naturwissenschaften |
Abbreviated Journal |
Naturwissenschaften |
| Volume |
99 |
Issue |
7 |
Pages |
579-582 |
| Keywords |
Ant predation; Azteca andreae; Cleptobiosis; Flies and dung beetles; Myrmecophyte; Reduviidae; Socialwasps; Stinglessbees |
| Abstract |
Because group-hunting arboreal ants spread-eagle insect prey for a long time before retrieving them, these prey can be coveted by predatory flying insects. Yet, attempting to rob these prey is risky if the ant species is also an effective predator. Here, we show that trying to rob prey from Azteca andreae workers is a fatal error as 268 out of 276 potential cleptobionts (97.1 %) were captured in turn. The ant workers hunt in a group and use the “Velcro®” principle to cling firmly to the leaves of their host tree, permitting them to capture very large prey. Exceptions were one social wasp, plus some Trigona spp. workers and flies that landed directly on the prey and were able to take off immediately when attacked. We conclude that in this situation, previously captured prey attract potential cleptobionts that are captured in turn in most of the cases. © Springer-Verlag 2012. |
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Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, United States |
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00281042 (Issn) |
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Export Date: 30 July 2012; Source: Scopus; Coden: Natwa; doi: 10.1007/s00114-012-0929-x; Language of Original Document: English; Correspondence Address: Dejean, A.; CNRS, Écologie des Forêts de Guyane (UMR-CNRS 8172), Campus agronomique, BP 316, 97379 Kourou cedex, France; email: alain.dejean@wanadoo.fr |
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EcoFoG @ webmaster @ |
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417 |
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Dejean, A.; Revel, M.; Azémar, F.; Roux, O. |
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Altruism during predation in an assassin bug |
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Journal Article |
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2013 |
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Naturwissenschaften |
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Naturwissenschaften |
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100 |
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10 |
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913-922 |
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Conspecific tolerance; Predation; Prey sharing; Reduviidae; Zelus annulosus |
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Zelus annulosus is an assassin bug species mostly noted on Hirtella physophora, a myrmecophyte specifically associated with the ant Allomerus decemarticulatus known to build traps on host tree twigs to ambush insect preys. The Z. annulosus females lay egg clutches protected by a sticky substance. To avoid being trapped, the first three instars of nymphs remain grouped in a clutch beneath the leaves on which they hatched, yet from time to time, they climb onto the upper side to group ambush preys. Long-distance prey detection permits these bugs to capture flying or jumping insects that alight on their leaves. Like some other Zelus species, the sticky substance of the sundew setae on their forelegs aids in prey capture. Group ambushing permits early instars to capture insects that they then share or not depending on prey size and the hunger of the successful nymphs. Fourth and fifth instars, with greater needs, rather ambush solitarily on different host tree leaves, but attract siblings to share large preys. Communal feeding permits faster prey consumption, enabling small nymphs to return sooner to the shelter of their leaves. By improving the regularity of feeding for each nymph, it likely regulates nymphal development, synchronizing molting and subsequently limiting cannibalism. © 2013 Springer-Verlag Berlin Heidelberg. |
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IRD, Maladies Infectieuses et Vecteurs, Ecologie, Genetique, Evolution et Controle (UMR-IRD 224), IRD 01, BP 171, Bobo-Dioulasso, Burkina Faso |
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Export Date: 30 October 2013; Source: Scopus; Coden: Natwa; doi: 10.1007/s00114-013-1091-9; Language of Original Document: English; Correspondence Address: Dejean, A.; Écologie des Forêts de Guyane, Campus Agronomique, BP 316, 97379 Kourou cedex, France; email: alain.dejean@wanadoo.fr |
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