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1. Sensitivity of South American tropical forests to an extreme climate anomaly

Author

Bennett, Amy C., Rodrigues de Sousa, Thaiane, Monteagudo-Mendoza, Abel, Esquivel-Muelbert, Adriane, Morandi, Paulo S., Coelho de Souza, Fernanda, Castro, Wendeson, Duque, Luisa Fernanda, Flores Llampazo, Gerardo, Manoel dos Santos, Rubens, Ramos, Eliana, Vilanova Torre, Emilio, Alvarez-Davila, Esteban, Baker, Timothy R., Costa, Flávia R. C., Lewis, Simon L., Marimon, Beatriz S., Schietti, Juliana, Burban, Benoît, Berenguer, Erika, Araujo-Murakami, Alejandro, Restrepo Correa, Zorayda, Lopez, Wilmar, Delgado Santana, Flávia, Viscarra, Laura Jessica, Elias, Fernando, Vasquez Martinez, Rodolfo, Marimon-Junior, Ben Hur, Galbraith, David, Sullivan, Martin J. P., Emilio, Thaise, Prestes, Nayane C. C. S., Barlow, Jos, Alencar Fagundes, Nathalle Cristine, Almeida de Oliveira, Edmar, Alvarez Loayza, Patricia, Alves, Luciana F., Aparecida Vieira, Simone, Andrade Maia, Vinícius, Aragão, Luiz E. O. C., Arets, Eric J. M. M., Arroyo, Luzmila, Bánki, Olaf, Baraloto, Christopher, Barbosa Camargo, Plínio, Barroso, Jorcely, Bento da Silva, Wilder, Bonal, Damien, Borges Miranda Santos, Alisson, Brienen, Roel J. W., Brown, Foster, Castilho, Carolina V., Cerruto Ribeiro, Sabina, Chama Moscoso, Victor, Chavez, Ezequiel, Comiskey, James A., Cornejo Valverde, Fernando, Dávila Cardozo, Nállarett, de Aguiar-Campos, Natália, de Oliveira Melo, Lia, del Aguila Pasquel, Jhon, Derroire, Géraldine, Disney, Mathias, do Socorro, Maria, Dourdain, Aurélie, Feldpausch, Ted R., Ferreira, Joice, Forni Martins, Valeria, Gardner, Toby, Gloor, Emanuel, Gutierrez Sibauty, Gloria, Guillen, René, Hase, Eduardo, Hérault, Bruno, Honorio Coronado, Eurídice N., Huaraca Huasco, Walter, Janovec, John P., Jimenez-Rojas, Eliana, Joly, Carlos, Kalamandeen, Michelle, Killeen, Timothy J., Lais Farrapo, Camila, Levesley, Aurora, Lizon Romano, Leon, Lopez Gonzalez, Gabriela, Maës dos Santos, Flavio Antonio, Magnusson, William E., Malhi, Yadvinder, Matias de Almeida Reis, Simone, Melgaço, Karina, Melo Cruz, Omar A., Mendoza Polo, Irina, Montañez, Tatiana, Morel, Jean Daniel, Núñez Vargas, M Percy, Oliveira de Araújo, Raimunda, Pallqui Camacho, Nadir C., Parada Gutierrez, Alexander, Pennington, Toby, Pickavance, Georgia C., Pipoly, John, Pitman, Nigel C. A., Quesada, Carlos, Ramirez Arevalo, Freddy, Ramírez‐Angulo, Hirma, Flora Ramos, Rafael, Richardson, James E., Rodrigo de Souza, Cléber, Roopsind, Anand, Schwartz, Gustavo, Silva, Richarlly C., Silva Espejo, Javier, Silveira, Marcos, Singh, James, Soto Shareva, Yhan, Steininger, Marc, Stropp, Juliana, Talbot, Joey, ter Steege, Hans, Terborgh, John, Thomas, Raquel, Valenzuela Gamarra, Luis, van der Heijden, Geertje, van der Hout, Peter, Zagt, Roderick, and Phillips, Oliver L.

Published
2023
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2. Basin-wide variation in tree hydraulic safety margins predicts the carbon balance of Amazon forests

Author

Tavares, Julia Valentim, Oliveira, Rafael S., Mencuccini, Maurizio, Signori-Müller, Caroline, Pereira, Luciano, Diniz, Francisco Carvalho, Gilpin, Martin, Marca Zevallos, Manuel J., Salas Yupayccana, Carlos A., Acosta, Martin, Pérez Mullisaca, Flor M., Barros, Fernanda de V., Bittencourt, Paulo, Jancoski, Halina, Scalon, Marina Corrêa, Marimon, Beatriz S., Oliveras Menor, Imma, Marimon, Jr, Ben Hur, Fancourt, Max, Chambers-Ostler, Alexander, Esquivel-Muelbert, Adriane, Rowland, Lucy, Meir, Patrick, Lola da Costa, Antonio Carlos, Nina, Alex, Sanchez, Jesus M. B., Tintaya, Jose S., Chino, Rudi S. C., Baca, Jean, Fernandes, Leticia, Cumapa, Edwin R. M., Santos, João Antônio R., Teixeira, Renata, Tello, Ligia, Ugarteche, Maira T. M., Cuellar, Gina A., Martinez, Franklin, Araujo-Murakami, Alejandro, Almeida, Everton, da Cruz, Wesley Jonatar Alves, del Aguila Pasquel, Jhon, Aragāo, Luís, Baker, Timothy R., de Camargo, Plinio Barbosa, Brienen, Roel, Castro, Wendeson, Ribeiro, Sabina Cerruto, Coelho de Souza, Fernanda, Cosio, Eric G., Davila Cardozo, Nallaret, da Costa Silva, Richarlly, Disney, Mathias, Espejo, Javier Silva, Feldpausch, Ted R., Ferreira, Leandro, Giacomin, Leandro, Higuchi, Niro, Hirota, Marina, Honorio, Euridice, Huaraca Huasco, Walter, Lewis, Simon, Flores Llampazo, Gerardo, Malhi, Yadvinder, Monteagudo Mendoza, Abel, Morandi, Paulo, Chama Moscoso, Victor, Muscarella, Robert, Penha, Deliane, Rocha, Mayda Cecília, Rodrigues, Gleicy, Ruschel, Ademir R., Salinas, Norma, Schlickmann, Monique, Silveira, Marcos, Talbot, Joey, Vásquez, Rodolfo, Vedovato, Laura, Vieira, Simone Aparecida, Phillips, Oliver L., Gloor, Emanuel, and Galbraith, David R.

Published
2023
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3. Sustainable palm fruit harvesting as a pathway to conserve Amazon peatland forests

Author

Hidalgo Pizango, C. Gabriel, Honorio Coronado, Eurídice N., del Águila-Pasquel, Jhon, Flores Llampazo, Gerardo, de Jong, Johan, Córdova Oroche, César J., Reyna Huaymacari, José M., Carver, Steve J., del Castillo Torres, Dennis, Draper, Frederick C., Phillips, Oliver L., Roucoux, Katherine H., de Bruin, Sytze, Peña-Claros, Marielos, van der Zon, Marieke, Mitchell, Gordon, Lovett, Jon, García Mendoza, Gabriel, Gatica Saboya, Leticia, Irarica Pacaya, Julio, Brañas, Manuel Martín, Ramírez Paredes, Eliseo, and Baker, Timothy R.

Published
2022
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4. The presence of peat and variation in tree species composition are under different hydrological controls in Amazonian wetland forests.

Author

Flores Llampazo, Gerardo, Honorio Coronado, Eurídice N., del Aguila‐Pasquel, Jhon, Cordova Oroche, César J., Díaz Narvaez, Antenor, Reyna Huaymacari, José, Grandez Ríos, Julio, Lawson, Ian T., Hastie, Adam, Baird, Andy J., and Baker, Timothy R.

Subjects
FORESTED wetlands, PEAT, PALMS, WATER table, WATER depth, ELECTRIC conductivity, ECOSYSTEMS
Abstract

The peat‐forming wetland forests of Amazonia are characterized by high below‐carbon stocks and supply fruit, fibres and timber to local communities. Predicting the future of these ecosystem services requires understanding how hydrological conditions are related to tree species composition and the presence, or absence, of peat. Here, we use continuous measurements of water table depth over 2.5 years and manual measurements of pore‐water pH and electrical conductivity to understand the ecohydrological controls of these variables across the large peatland complex in northern Peruvian Amazonia. Measurements were taken in permanent forest plots in four palm swamps, four seasonally flooded forests and four peatland pole forests. All trees ≥10 cm diameter were also measured and identified in the plots to assess floristic composition. Peat occurs in eight of these twelve sites; three seasonally flooded forests and one palm swamp are not associated with peat. Variation in tree species composition among forest types was linked to high flood levels (maximum flooding height) and pH: seasonally flooded forests experience high flood levels (up to 3.66 m from the ground surface) and have high pH values (6–7), palm swamps have intermediate flood levels (up to 1.34 m) and peatland pole forests experience shallow flooding (up to 0.28 m) and have low pH (4). In contrast, the presence of peat was linked to variation in maximum water table depth (i.e. the depth to which the water table drops below the ground surface). Surface peat is found in all forest types where maximum water table depth does not fall >0.55 m below the ground surface at any time. Peat formation and variation in tree species composition therefore have different ecohydrological controls. Predicted increases in the frequency and strength of flooding events may alter patterns of tree species composition, whereas increases in drought severity and declines in minimum river levels may pose a greater risk to the belowground carbon stores of these peatland ecosystems. [ABSTRACT FROM AUTHOR]

Published
2022
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5. Molecular evidence for three genetic species of Dipteryx in the Peruvian Amazon.

Author

Garcia-Davila, Carmen, Aldana Gomero, David, Renno, Jean-François, Diaz Soria, Rossana, Hidalgo Pizango, Gabriel, Flores Llampazo, Gerardo, Castro-Ruiz, Diana, Mejia de Loayza, Eduardo, Angulo Chavez, Carlos, Mader, Malte, Tysklind, Niklas, Paredes-Villanueva, Kathelyn, del Castillo Torres, Dennis, Degen, Bernd, and Honorio Coronado, Eurídice N.

Abstract

There is a high international demand for timber from the genus Dipteryx, or "shihuahuaco" as it is known in Peru. Developing tools that allow the identification and discrimination of Dipteryx species is therefore important for supporting management of natural populations and to underpin legal trade of its timber. The objective of this study was the molecular characterization of Dipteryx species in the Peruvian Amazonia. Two plastid regions (cpDNA: trnH–psbA and matK) were sequenced and 11 microsatellite markers (nDNA) were genotyped for 32 individuals identified as Dipteryx charapilla, D. micrantha morphotype 1 and D. micrantha morphotype 2. Using the concatenated sequences of the plastid genes, we identified ten haplotypes that were not shared between the species or between the D. micrantha morphotypes. Haplotypic diversity was greater in D. micrantha morphotype 2 and D. charapilla than in D. micrantha morphotype 1, which presented only one haplotype with a wide distribution in Peru. The microsatellites allowed the discrimination of the same three clades and identified diagnostic alleles for each clade. These results allowed us to demonstrate that the two morphotypes of D. micrantha are different at both the plastid and nuclear markers, which supports the existence of three genetically distinct species in Peru. This study provides information for the genetic discrimination of Dipteryx species and emphasises the importance of conserving the genetic variability of this genus in the Peruvian Amazonia. [ABSTRACT FROM AUTHOR]

Published
2020
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6. Dominant tree species drive beta diversity patterns in western Amazonia.

Author

Asner, Gregory P., Draper, Frederick C., Vásquez Martínez, Rodolfo, Monteagudo‐Mendoza, Abel, Roucoux, Katherine H., Ramírez Arévalo, Fredy R., Flores Llampazo, Gerardo, Corrales Medina, Massiel, Baraloto, Christopher, Honorio Coronado, Eurídice N., Zárate Gómez, Ricardo, Tagle Casapia, Ximena, Del Aguila Pasquel, Jhon, Baker, Timothy R., Phillips, Oliver L., Brienen, Roel J. W., García‐Villacorta, Roosevelt, Pitman, Nigel C. A., Fine, Paul V. A., and Mesones Acuy, Ítalo

Subjects
ENDANGERED species, TREES & climate, TROPICAL forests
Abstract

The forests of western Amazonia are among the most diverse tree communities on Earth, yet this exceptional diversity is distributed highly unevenly within and among communities. In particular, a small number of dominant species account for the majority of individuals, whereas the large majority of species are locally and regionally extremely scarce. By definition, dominant species contribute little to local species richness (alpha diversity), yet the importance of dominant species in structuring patterns of spatial floristic turnover (beta diversity) has not been investigated. Here, using a network of 207 forest inventory plots, we explore the role of dominant species in determining regional patterns of beta diversity (community‐level floristic turnover and distance‐decay relationships) across a range of habitat types in northern lowland Peru. Of the 2,031 recorded species in our data set, only 99 of them accounted for 50% of individuals. Using these 99 species, it was possible to reconstruct the overall features of regional beta diversity patterns, including the location and dispersion of habitat types in multivariate space, and distance‐decay relationships. In fact, our analysis demonstrated that regional patterns of beta diversity were better maintained by the 99 dominant species than by the 1,932 others, whether quantified using species‐abundance data or species presence–absence data. Our results reveal that dominant species are normally common only in a single forest type. Therefore, dominant species play a key role in structuring western Amazonian tree communities, which in turn has important implications, both practically for designing effective protected areas, and more generally for understanding the determinants of beta diversity patterns. [ABSTRACT FROM AUTHOR]

Published
2019
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