In press (Lab members and co-supervised students in bold)

  • Bastazini, V. A. G. P.M.A. Ferreira, B.O. Azambuja, G. Casas, V.J. Debastiani, P.R. Guimaraes , V.D.P. Pillar. Untangling the tangled bank: a novel method for partitioning the effects of phylogenies and traits on ecological networks. Evolutionary Biology (in press).

  • Muniz, D., E.S.A. Santos, P. R. Guimaraes, S. Nakagawa, G. Machado.A multinomial network method for the analysis of mate choice and assortative mating in spatially structured populations. Methods in Ecology and Evolution (in press).

  • Pires, M. M., P. R. Guimaraes, M. Galetti, P. Jordano. Pleistocene megafaunal extinctions and the functional loss of long-distance seed dispersal services. Ecography (in press).

  • Raimundo, R. L. G., F. M. D. Marquitti, C. S. Andreazzi, M. M. Pires, P. R. Guimaraes.Ecology and Evolution of species-rich interaction networks. In W. Dattilo, V. Rico-Gray. Ecological Networks in the Tropics. Springer.

  • Sebastian-Gonzalez, E., M. M. Pires, C. I. Donatti, P. R. Guimaraes, R. Dirzo. Species traits and interaction rules shape a species-rich seed dispersal interaction network. Ecology and Evolution (in press).

  • Sfair, J. C., V. L. Weiser, F. R. Martins, M. M. Vidal, P. R. Guimaraes. Species traits and abundance influence the organisation of liana–tree antagonistic interaction. Austral Ecology (in press).


  • Andreazzi, C., J. N. Thompson, P. R. Guimaraes. 2017. Network structure and selection asymmetry drive coevolution in species-rich antagonistic interactions. American Naturalist 190: 99-115.

  • Bonaldo, R. M.,P. R. Guimaraes, M. M. Pires, A. S. Hoey, M. E. Hay. 2017. Small marine protected areas in Fiji provide refuge for reef fish assemblages, feeding groups, and corals. PLoS ONE 12: e0170638.

  • Cantor, M. M.M. Pires, F. M. Marquitti, R. L. G. Raimundo, E. Sebastian-Gonzalez, P. P. Coltri, S. I. Perez, D. R. Barneche, D.Y.C. Brandt, K. Nunes, F. G. Daura-Jorge, S. R. Floeter, P. R. Guimaraes. Nestedness across biological scales. PLoS ONE 12: e0171691.

  • Pires, M. M., F. M. D. Marquitti, P. R. Guimaraes. 2017. The friendship paradox in species-rich ecological networks: implications for conservation and monitoring. Biological Conservation 209: 245-252.

  • Toju, H., M. Yamamichi, P. R. Guimaraes, J. M. Olesen, A. Mougi, T. Yoshida, J. N. Thompson. 2017. Species-rich networks and eco-evolutionary synthesis at the metacommunity level Nature Ecology and Evolution 1: 24.


  • Burin, G., W. D. Kissling, P. R. Guimaraes , C. H. Sekercioglu, T. B. Quental. 2016. Omnivory in birds is a macroevolutionary sink. Nature Communications 11250.

  • Dattilo, W., N. Lara-Rodriguez, P. Jordano, P. R. Guimaraes, J.N. Thompson, R. J. Marquis, L. Medeiros, R. Ortiz-Pulido, M. A. Marcos-Garcia, V. Rico-Gray, 2016. Unraveling Darwin's entangled bank: architecture and robustness of mutualistic networks with multiple interaction types. Proceedings of the Royal Society B 283: 20161564.

  • Guimaraes, P.R., G. de Deyn. 2016. Ecological networks: assembly and consequences. Oikos 125: 443–445.

  • Guimaraes, P.R., M. M. Pires, F. M. D. Marquitti, R. L. G. Raimundo. The ecology of mutualisms. 2016. eLS: 1–9.

  • Lemos-Costa, P., M. M. Pires, M. S. Araujo, M. A. M. de Aguiar, P. R. Guimaraes. Network analyses support the role of prey preferences in shaping resource use patterns within five animal populations. Oikos 125:492-501

  • Sebastian-Gonzalez, E., M. Moleón, J. P. Gibert, F. Botella, P. Mateo-Tomás, P. P. Olea, P. R. Guimaraes, J. A. Sánchez-Zapata. 2016. Nested species-rich networks of scavenging vertebrates support high levels of interspecific competition. Ecology 97:95-105.


  • Astegiano, J., P. R. Guimaraes, P. O. Cheptou, M. M. Vidal, C. Y. Mandai, L. Ashworth, F. Massol. 2015. Plant-pollinator network persistence and habitat loss: insights from trait-based metacommunity models. Advances in Ecological Research 53: 201-257.

  • Astegiano, J., F. Massol, M. M. Vidal, P. O. Cheptou, P. R. Guimaraes. 2015. Linking Plant Interaction Patterns and Sensitivity to Pollinator Loss. PLoS ONE 10: e0117243 [PDF].

  • Giannini, T.C., L.A. Garibaldi, A. L. Acosta, J. S. Silva, K. P. Maia, A. M. Saraiva, P. R. Guimaraes, A. M. P. Kleinert. 2015. Native and non-native supergeneralist bee species have different impacts on plant-bee networks. PLoS ONE 10: e0137198 [PDF].

  • Muniz, D., P. R. Guimaraes, B. Buzatto, G. Machado. 2015. A sexual network approach to sperm competition in a species with alternative mating tactics. Behavioral Ecology 26: 121-129. [PDF].

  • Pires, M. M., M. Cantor, P. R. Guimaraes , M. A. M. de Aguiar, S. F. dos Reis, P. P. Coltri. 2015. The network organization of protein interactions in the spliceosome is reproduced by the simple rules of food-web models. Scientific Reports 5: 14865. [PDF].

  • Pires, M. M., P. L. Koch, R. A. Farina, M. A. M. de Aguiar, S. F. dos Reis, P. R. Guimaraes . 2015. Pleistocene megafaunal interaction networks became more vulnerable after human arrival. Proceedings of the Royal Society of London B 282: 20151367. [PDF].

  • Sebastian-Gonzalez, E., B. Dalsgaard, B. Sandel, P. R. Guimaraes. 2015. Macroecological trends in nestedness and modularity of seed-dispersal networks: human impact matters. Global Ecology and Biogeography 24: 293–303.

  • Toju, H., P. R. Guimaraes, J. M. Olesen, J. N. Thompson. 2015. Below-ground plant-fungal network topology is not congruent with above-ground plant-animal network topology. Science Advances 1:e150029.

  • Yeakel, J.D., M. M. Pires, L. Rudolf, N. J. Dominy, P. L. Koch, P. R Guimaraes, T. Gross. 2015. Reply to Evans and Bar-Oz et al.: Recovering ecological pattern and process in Ancient Egypt. Proceedings of the National Academy of Sciences USA 112: e240-e240.


  • Dáttilo, W., F. M. D. Marquitti, P. R. Guimaraes, T. J. Izzo. 2014. The structure of ant-plant ecological networks: is abundance enough?. Ecology 95: 475–485. [PDF],

  • Marquitti, F. M. D., P. R. Guimaraes, M. M. Pires, L. F. Bittencourt. 2014. MODULAR: Software for the Autonomous Computation of Modularity in Large Network Sets. Ecography: 37: 221–224.

  • Pires, M. M., M. Galetti, C. I. Donatti, M. A. Pizo, R. Dirzo, P. R. Guimaraes. 2014. Reconstructing past ecological networks: the reconfiguration of seed-dispersal interactions after megafaunal extinction. Oecologia 175: 1247-1256. [PDF]

  • Raimundo, R. L. G., J. P. Gibert, D. H. Hembry, P. R. Guimaraes. 2014. Conflicting selection in the course of adaptive diversification: the interplay between mutualism and intraspecific competition. American Naturalist 183: 363-375. [PDF]

  • Toju, H., P. R. Guimaraes, J. M. Olesen, J. N. Thompson. 2014. Assembly of complex plant–fungus networks. Nature Communications 5: 5273.

  • Vidal, M. M., E. Hasui, M. A. Pizo, J. Y. Tamashiro, W. R. Silva, P. R. Guimaraes. 2014. Frugivores at higher risk of extinction are the key elements of a mutualistic network. Ecology 95: 3440–3447. [PDF] [F1000-Recommendation].

  • Yeakel J. D, J. W. Moore, P. R. Guimaraes, M. A. M de Aguiar. 2014. Synchronization and stability in river metapopulation networks. Ecology Letters 17: 273–283.

  • Yeakel J. D*, M. M. Pires*, L. Rudolf*, N. J. Dominy,P. L. Koch, P. R. Guimaraes, T. Gross. 2014. Collapse of an ecological network in Ancient Egypt. Proceedings of the National Academy of Sciences USA 111: 14472–14477. *contributed equally. [PDF]


  • Cantor, M., M. M. Pires, G. G. Longo, P. R Guimaraes, E. Z. F. Setz. 2013. Individual variation in resource use by opossums leading to nested fruit consumption. Oikos 122: 1085–1093. [PDF]

  • Dáttilo, W., P. R. Guimaraes, T. J. Izzo. 2013.Spatial structure of ant-plant mutualistic networks. Oikos 122: 1643–1648.

  • Eklöf, A., U. Jacob, J. Kopp, J. Bosch, R. Castro-Urgal, B. Dalsgaard, N. Chacoff, C. de Sassi, M. Galetti, P. R. Guimaraes, S. B. Lomáscolo, A. M. M. González, M. A. Pizo, R. Rader, A. Rodrigo, J. M. Tylianakis, D. P. Vazquez, S. Allesina. 2013. The Dimensionality of Ecological Networks. Ecology Letters 16: 577–583. [PDF]

  • Diaz-Castelazo, C., I. R. Sanchez-Galvan, P. R. Guimaraes, R. L. G. Raimundo, V. Rico-Gray. 2013. Long-term temporal variation in the organization of an ant-plant network. Annals of Botany 111: 1285-1293.

  • Galetti,M., R. Guevara, M. C. Cortes, R. Fadini, S. Von Matter, A. B. Leite, F. Labecca, T. Ribeiro, C. S. Carvalho, R. G. Collevatti, M. M. Pires, P. R. Guimaraes, P. H. Brancalion, M. C. Ribeiro, P. Jordano. 2013. Functional Extinction of Birds Drives Rapid Evolutionary Changes in Seed Size. Science 340: 1086-1090. [PDF] [F1000-recommendation]

  • Gibert, J. P., M. M. Pires, J. N. Thompson, P. R. Guimaraes. 2013. The spatial structure of antagonistic species affects coevolution in predictable ways. American Naturalist 182: 578-591. [PDF].

  • Guimaraes, P. R. 2013. Ecological Networks. In Gibson, David. Oxford Bibliographies in Ecology. Oxford University Press. New York.

  • Pires, M. M., P. R. Guimaraes. 2013. Interaction intimacy organizes networks of antagonistic interactions in different ways. Journal of the Royal Society Interface 10: 20120649.[PDF]

  • Reigada, C., S. B. L. Araujo, M. A. M. Aguiar, J. Z. Giao, P. R. Guimaraes, L. A. Trinca, W. A. C. Godoy. 2013. Impacts of enemy-mediated effects and additivity of interactions on insect trophic system. Population Ecology. 55:11-26.

  • Thompson, J. N., C. Schwind, P. R. Guimaraes, M. Friberg. 2013. Diversification through multitrait evolution in a coevolving interaction. Proceedings of the National Academy of Sciences USA 110: 11487-11492. [PDF]

  • Vidal, M. M.*, M. M. Pires*, P. R. Guimaraes. 2013. Large vertebrates as the missing components of seed dispersal networks. Biological Conservation 163: 42-48. * contributed equally.

  • Yeakel, J. D., P. R. Guimaraes, H. Bocherens, P. L. Koch. 2013. The impact of climate change on the structure of Pleistocene mammoth steppe food webs. Proceedings of the Royal Society of London B 280: 20130239.


  • Cantor, M., L. L. Wedekin, P. R Guimaraes, F. G. Daura-Jorge, M. R. Rossi-Santos, P. C. Simoes-Lopes. 2012. Disentangling social networks from spatiotemporal dynamics: the temporal structure of a dolphin society. Animal Behaviour 84:641-651.

  • Genini, J., M. Cortes, P. R. Guimaraes, M. Galetti. 2012. Mistletoes play different roles in a modular host-parasite network. Biotropica 44:171-178. [PDF]

  • Hagen, M., W. D. Kissiling, C. Rasmussen, M. A. M. de Aguiar, L. Brown, D. W. Carstensen, I. Alves-dos-Santos, Y. L. Dupont, F. K. Edwards, J. Genini, P. R. Guimaraes, G. B. Jenkins, P. Jordano, C. N. Kaiser-Bunbury, M. Ledger, K. P. Maia, F. M. D. Marquitti, O. McLaughlin, L. P. C. Morellato, E. J. O'Gorman, K. Trojelsgaard, J. M. Tylianakis, M. M. Vidal, G. Woodward, J. Olesen. 2012. Biodiversity, species interactions and ecological networks in a fragmented world. Advances in Ecological Research 46: 89-210 [PDF]

  • Moleon,M., E. Sebastian-Gonzalez,J. A. Sanchez-Zapata, J. Real, M. M. Pires, J. M. Gil-Sanchez, J. Bautista, L.Palma, P. Bayle, P. R. Guimaraes, P. Beja. 2012. Changes in intrapopulation resource use patterns of an endangered raptor in response to a disease-mediated crash in prey abundance. Journal of Animal Ecology 81: 1154–1160. [PDF]

  • Rico-Gray, V., C. Diaz-Castelazo; A. Ramirez-Hernandez, P. R Guimaraes,J. N. Holland. 2012. Abiotic factors shape temporal variation in the structure of an ant-plant network. Arthropod-Plant Interactions 6: 289-295 [PDF]

  • Sazima, C., P. Jordano, P. R Guimaraes, S. F. dos Reis, I. Sazima. 2012. Cleaning associations between birds and herbivorous mammals in Brazil: structure and complexity. Auk 129:36-43 [PDF]

  • Tinker, M. T., P. R. Guimaraes, M. Novak, F. M. D. Marquitti, J. Bodkin, M. Staedler, G. Bentall, J. Estes. 2012. Structure and mechanism of diet specialization: testing models of individual variation in resource use with sea otters. Ecology Letters 15: 475-483. [PDF]

  • Yeakel, J. D., P. R. Guimaraes, M. Novak, K. Fox-Dobbs, P. L. Koch. 2012. Probabilistic patterns of interaction: The effects of link-strength variability on food-web structure. Journal of the Royal Society Interface 9: 3219-3228. [PDF]


  • Donatti, C.I., P. R. Guimaraes, M. Galetti, M. A. Pizo, F. M. D. Marquitti, R. Dirzo. 2011. Analysis of a hyper-diverse seed dispersal network: modularity and underlying mechanisms. Ecology Letters 14:773-781. [PDF]

  • Fontaine, C., P. R. Guimaraes, S. Kefi., N. Loeuille, J. Memmott, W. Van der Putten, F. van Veen, E. Thebault. The ecological and evolutionary implications of merging different types of networks. 2011. Ecology Letters 14:773-781. [PDF]

  • Guimaraes, P.R., P. Jordano, J. N. Thompson. 2011. Evolution and coevolution in mutualistic networks. Ecology Letters 14:877-885. [PDF]. See also the article in Science highlighting this study: [Editors' Choice]

  • Mello, M. A.R, F. M. D. Marquitti, P. R. Guimaraes, E. K. V. Kalko, P. Jordano, M. A. M. de Aguiar. 2011.The missing part of seed dispersal networks: structure and robustness of bat-fruit interactions. PLoS ONE 6: e17395. [PDF]

  • Mello, M. A.R, F. M. D. Marquitti, P. R. Guimaraes, E. K. V. Kalko, P. Jordano, M. A. M. de Aguiar. 2011. The modularity of seed dispersal: differences in structure and robustness between bat - and bird - fruit networks. Oecologia 167: 131-140 [PDF]

  • Pires, M.M., P. R. Guimaraes, M. S. Araujo, A. A. Giaretta, J. C. L. Costa, S. F. dos Reis. 2011. The nested assembly of individual-resource networks. Journal of Animal Ecology 80: 893-903 [PDF]

  • Pires, M.M., P.I. Prado, P. R. Guimaraes. 2011. Do Food Web Models Reproduce the Structure of Mutualistic Networks? PLoS ONE 6: e27280. [PDF]

  • Yeakel, J. D., M. Novak; P. R Guimaraes,N. J. Dominy, P. L. Koch, E. J. Ward, J. W Moore, B. X. Semmens. 2011. Merging resource availability with isotope mixing models: the role of neutral interaction assumptions. PLoS ONE 6: e22015. [PDF]


  • Araujo, M. S., E. G. Martins, L. D. Cruz, F. R. Fernandes, A. X. Linhares, S. F. dos Reis, P. R. Guimaraes. 2010. Nested diets: a novel pattern of individual-level resource use. Oikos 119:81-88 [PDF]

  • Diaz-Castelazo, C., P. R. Guimaraes, P. Jordano, J. N. Thompson, R. J. Marquis, V. Rico-Gray. 2010. Changes of a mutualistic network over time: reanalysis over a 10-year period. Ecology 91:793-801. [PDF]

  • Genini, J., L. P. C. Morellato, P. R. Guimaraes, J. M. Olesen. 2010. Cheaters in mutualism networks. Biology Letters 6:494-497. [PDF]

  • Guimaraes, P. R. 2010. A estrutura e dinamica evolutiva de redes mutualisticas. Ciencia e Ambiente 39: 137-148. [PDF]

  • Hisi, A., N. S., P. R.Guimaraes, M. A. M. de Aguiar. 2010. The role of predator overlap in the robustness and extinction of a four species predator-prey network. Physica A 389: 4725-4733 [PDF]

  • Sazima, C., P. R. Guimaraes, S. F. dos Reis, I. Sazima. 2010. What makes a species central in a cleaning mutualism network? Oikos 119:1319-1325. [PDF]


  • Donatti, C., P. R. Guimaraes, M. Galetti. 2009. Seed dispersal and predation in the endemic Atlantic rainforest palm Astrocaryum aculeatissimum across a gradient of seed disperser abundance. Ecological Research 24: 1187-1195. [PDF]

  • Galetti, M., R. S. Boverdorp, R. F. Fadini, C. O. A. Gussoni, M. Rodrigues, P. R. Guimaraes, A. D. Alvarez. 2009. Hyper abundant mesopredators and non-random bird extinction in an Atlantic forest island. Zoologia. 26: 288-298. [PDF]

  • Martins, V. F., P. R. Guimaraes, C. R. B. Haddad, J. Semir. 2009. The effect of ants on the seed dispersal cycle of the typical myrmecochorous Ricinus communis. Plant Ecology 205: 213-222. [PDF]

  • Perez, S. I., M. A. M. de Aguiar, P. R. Guimaraes, S. F. dos Reis. 2009. Searching for modular structure in complex phenotypes: Inferences from network theory. Evolutionary Biology. 36: 416-422. [PDF]


  • Almeida-Neto, M., P. Guimaraes, P. R. Guimaraes, R. D. Loyola, W. Urlich. 2008. A consistent metric for nestedness analysis in ecological systems: reconciling concept and measurement. Oikos 117: 1227-1239. [PDF]

  • Araujo, M. S., P. R. Guimaraes, R. Svanback, A. Pinheiro, P. Guimaraes, S. F. dos Reis, D. I. Bolnick. 2008. Network analysis reveals contrasting effects of intraspecific competitions on individual vs. population diets. Ecology 89: 1981-1993. [PDF]

  • Fortuna, M. A., C. Garcia, P. R. Guimaraes, J. Bascompte. 2008. Spatial mating networks in insect-pollinated plants. Ecology Letters 11: 490-498. [PDF]

  • Francisco, M. R., V. O. Lunardi, P. R. Guimaraes, M. Galetti. 2008. Factors affecting seed predation of Eriotheca gracipiles (Bombacaceae) by parakeets in a cerrado fragment. Acta Oecologica 33: 240-245. [PDF]

  • Guimaraes, P. R., M. Galetti, P. Jordano. 2008. Seed dispersal anachronisms: rethinking the fruits extinct megafauna ate. PLoS ONE 3: e1745. [PDF]

  • Krishna, A., P. R. Guimaraes, P. Jordano, J. Bascompte. 2008. A neutral-niche theory of nestedness in mutualistic networks. Oikos 117: 1609-1618. [PDF]

  • Mello, M. A.R., F.M. D. Marquitti, P. R. Guimaraes, E.K.V. Kalko, P. Jordano. 2008. Small differences may lead to big consequences: bat and bird seed dispersal networks (Abstract, Luis F Barcardi Award 2008). Biotropica 40: 777-777.


  • Almeida-Neto, M., P. R. Guimaraes, T. M. Lewinsohn. 2007. On nestedness analyses: rethinking matrix temperature and anti-nestedness. Oikos. 116:716-722. [PDF]

  • Briani, D. C., P. R. Guimaraes. 2007. Fruit damage of Solanum lycocarpum (Solanaceae) by rodents (Rodentia: Muridae) in the cerrado of central Brazil. Acta Oecologica 31:8-12. [PDF]

  • Donatti, C. I., M. Galetti, M. A. Pizo, P. R. Guimaraes, P. Jordano. 2007. Living in the land of ghosts: Fruit traits and the importance of large mammals as seed dispersers in the Pantanal, Brazil . In: Dennis, A., R. Green, E. W. Schupp, D. Wescott. Frugivory and seed dispersal: theory and applications in a changing world. Wallingford : Commonwealth Agricultural Bureau International. [PDF]

  • Guimaraes, P. R., M. Argollo de Menezes, R. W. Baird, D. Lusseau, P.Guimaraes, S. F. dos Reis. 2007. Vulnerability of a killer whale social network to disease outbreaks. Physical Review E 76: 042901 [PDF]

  • Guimaraes, P. R., R. M. Bonaldo, J. P. Krajewski, A. Pinheiro, P. Guimaraes, J. Powers, S. F. dos Reis. 2007. Investigating small fish schools: selection of school-formation models by means of general linear models and numerical simulations. Journal of Theoretical Biology 245:784-789.[PDF]

  • Guimaraes, P. R., G. Machado, M.A.M de Aguiar, P. Jordano, J. Bascompte, A. Pinheiro, S. F. dos Reis. 2007.Build-up mechanisms determining the topology of mutualistic networks. Journal of Theoretical Biology 249: 181-189.[PDF]

  • Guimaraes, P. R., V. Rico-Gray, P. S. Oliveira, T. J. Izzo, S. F. dos Reis, J.N. Thompson. 2007. Interaction intimacy affects structure and coevolutionary dynamics in mutualistic networks. Current Biology 17: 1797-1803. [PDF] [Supplemental Data]

  • Guimaraes, P. R., C. Sazima. S. F. dos Reis, I. Sazima. 2007. The nested structure of marine cleaning symbiosis: is it like flowers and bees? Biology Letters 3:51-54. [PDF]. See also the article in Science highlighting this study: [Editors' Choice]

  • Silva, W., P. R. Guimaraes, P. Guimaraes, S. F. dos Reis. 2007. Investigating fragility in plant-frugivore networks: a case study for Atlantic Forest . In: Dennis, A. J., E. W. Schupp, R. J. Green, D. W. Wescott. Seed dispersal: theory and its application in a changing world. Wallingford. Wallingford: CAB International.561-578.[PDF]


  • Fonseca, R. L., P. R. Guimaraes, S. R. Morbiolo, R. S. Pereira, A. T. Peterson. 2006. Vulnerability of Brazilian national parks to invasion by the alien weed Crotalaria pallida Ait. (Fabaceae) . Weed Science 54: 458-463. [PDF]

  • Ferro, V.G., P. R. Guimaraes, J. R. Trigo. 2006. Why larvae of Utetheisa ornatrix (Lepidoptera: Arctiidae) fed into pods of Crotalaria (Leguminosae: Papilionoideae)? Larval performance versus chemical and physical constraints. Entomologia Experimentalis et Applicata. 121: 23-29. [PDF]

  • Galetti, M., C. I. Donatti, A. Pires,P. R. Guimaraes, P. Jordano, P. 2006. Seed survival and dispersal of an endemic Atlantic forest palm: the combined effects of defaunation and forest fragmentation. Botanical Journal of the Linnean Society. 151:141-149. [PDF]

  • Guimaraes, P. R., P. Guimaraes. 2006. Improving the analyses of nestedness for large sets of matrices. Environmental Modelling and Software. 21: 1512-1513. [PDF]

  • Guimaraes, P. R., U. Kubota, R. L. Fonseca, B. Z. Gomes, C. Bottcher, M. Galetti. 2006. Testing the quick meal hypothesis: the effect of pulp on hoarding and seed predation of Hymenaea courbaril by red-rumped agoutis (Dasyprocta leporina) in southeast Brazil. Austral Ecology. 31:95-98. [PDF]

  • Guimaraes, P. R., R. L. G. Raimundo, C. Bottcher, R. R. Silva, J. R. Trigo. 2006. Extrafloral nectaries as a deterrent mechanism against seed predators in the chemically defended weed Crotalaria pallida (Leguminosae). Austral Ecology. 31: 776-782. [PDF]

  • Guimaraes, P. R., V. Rico-Gray, S. F. dos Reis, J.N. Thompson. 2006. Asymmetries in specialization in ant-plant mutualistic networks. Proceedings of the Royal Society of London B. 273: 2041-2047. [PDF] [Supplementary Material]

  • Martins, V. F.,P. R. Guimaraes, R.R. da Silva, J. Semir. 2006. Secondary seed dispersal by ants of Ricinus communis (Euphorbiaceae) in the Atlantic Forest in southeastern Brazil : influence on seed germination. Sociobiology. 47: 265-274. [PDF]

  • Sazima, C., Bonaldo, R. M., Krajewski, J. P.,P. R. Guimaraes. 2006. The ubiquitous nuclear goatfish Pseudupeneus maculatus and its follower fishes at an oceanic island in the tropical West Atlantic. Journal of Fish Biology. 69: 883-891. [PDF]


  • Guimaraes, P. R., M. A. M. de Aguiar, J. Bascompte, P. Jordano, S. F. dos Reis. 2005. Random initial condition in small Barabasi-Albert networks and deviations from the scale-free behavior. Physical Review E . 71: 037101. [PDF]

  • Guimaraes, P. R., B. Z. Gomes, Y. J. Ahn, M. Galetti.2005. Cache pilferage in red-rumped agoutis ( Dasyprocta leporina). Mammalia. 69:431-434. [PDF]

  • Guimaraes, P. R., P. F. M. Lopes, M. L. Lyra, A. P. Muriel. 2005. Fleshy pulp enhances the location of Syagrus romanzoffiana (Arecaceae) fruits by seed-dispersing rodents in an atlantic forest in southeastern Brazil . Journal of Tropical Ecology . 21: 109-112. [PDF]

  • Mello, M. A. R., N. O. Leiner, P. R. Guimaraes, P. Jordano. 2005. Size-based fruit selection of Calophyllum brasiliense (Clusiaceae) by bats in an Atlantic Forest , southeastern Brazil . Acta Chiropterologica . 7: 179-182. [PDF]

  • Pizo, M. A., P. R. Guimaraes, P. S. Oliveira. 2005. Seed removal by ants from faeces produced by different vertebrate species. Ecoscience . 12: 136-140. [PDF]


  • Galetti, M., P. R. Guimaraes. 2004. Seed dispersal of Attalea phalerata (Palmae) by Crested caracaras (Caracara plancus) in the Pantanal and a review of frugivory by raptors. Ararajuba . 12: 59-61. [PDF]

  • Raimundo, R. L. G., P. R. Guimaraes, M. Almeida-neto, M. A. Pizo. 2004. The influence of fruit morphology and habitat structure on ant-seed interactions: a study with artificial fruits. Sociobiology . 41: 261-270. [PDF]

  • Guimaraes, P. R., J. José, M. Galetti, J. R. Trigo. 2003. Quinolizidine alkaloids in Ormosia arborea seeds inhibit predation but not caching by agoutis ( Dasyprocta leporina). Journal of Chemical Ecology . 29: 1065-1072. [PDF]

  • Marsden, S. J., M. Whiffin, L. Sadgrove, P. R. Guimaraes. 2003. Bird Community composition and species abundance on two inshore islands in the Atlantic Forest region of Brazil . Ararajuba. 11:181-187.[PDF]

  • Galetti, M., P. R. Guimaraes. S. J. Marsden. 2002. Riqueza, Risco de Extinção e Conservação dos Psitacídeos Neotropicais. In: M. Galetti; M. A. Pizo. Ecologia e Conservação de Psitacídeos no Brasil. Melopsittacus Publicações. [PDF]

  • Guimaraes, P. R., R. Cogni. 2002. Seed cleaning of Cupania vernalis (Sapindaceae) by ants: edge effect in a highland forest in south-east Brazil . Journal of Tropical Ecology . 18: 303-307. [PDF]

  • Marsden, S. J., M. Whiffin, L. Sadgrove, P. R. Guimaraes. 2000. Parrot population and habitat use in and around two lowland Atlantic forest reserves, Brazil . Biological Conservation . 96: 209-215. [PDF]