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635 results on '"Armesto, Juan J."'

3. An Integrated Conservation Vision for Chilean Patagonia

Author

Armesto, Juan J., Martínez-Harms, María José, Castilla, Juan Carlos, Fuentes-Castillo, Taryn, Rezaei, Nima, Editor-in-Chief, Castilla, Juan Carlos, editor, Armesto Zamudio, Juan J., editor, Martínez-Harms, María José, editor, and Tecklin, David, editor

Published
2023
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4. COSORE: A community database for continuous soil respiration and other soil‐atmosphere greenhouse gas flux data

Author

Bond‐Lamberty, Ben, Christianson, Danielle S, Malhotra, Avni, Pennington, Stephanie C, Sihi, Debjani, AghaKouchak, Amir, Anjileli, Hassan, Arain, M Altaf, Armesto, Juan J, Ashraf, Samaneh, Ataka, Mioko, Baldocchi, Dennis, Black, Thomas Andrew, Buchmann, Nina, Carbone, Mariah S, Chang, Shih‐Chieh, Crill, Patrick, Curtis, Peter S, Davidson, Eric A, Desai, Ankur R, Drake, John E, El‐Madany, Tarek S, Gavazzi, Michael, Görres, Carolyn‐Monika, Gough, Christopher M, Goulden, Michael, Gregg, Jillian, del Arroyo, Omar Gutiérrez, He, Jin‐Sheng, Hirano, Takashi, Hopple, Anya, Hughes, Holly, Järveoja, Järvi, Jassal, Rachhpal, Jian, Jinshi, Kan, Haiming, Kaye, Jason, Kominami, Yuji, Liang, Naishen, Lipson, David, Macdonald, Catriona A, Maseyk, Kadmiel, Mathes, Kayla, Mauritz, Marguerite, Mayes, Melanie A, McNulty, Steve, Miao, Guofang, Migliavacca, Mirco, Miller, Scott, Miniat, Chelcy F, Nietz, Jennifer G, Nilsson, Mats B, Noormets, Asko, Norouzi, Hamidreza, O’Connell, Christine S, Osborne, Bruce, Oyonarte, Cecilio, Pang, Zhuo, Peichl, Matthias, Pendall, Elise, Perez‐Quezada, Jorge F, Phillips, Claire L, Phillips, Richard P, Raich, James W, Renchon, Alexandre A, Ruehr, Nadine K, Sánchez‐Cañete, Enrique P, Saunders, Matthew, Savage, Kathleen E, Schrumpf, Marion, Scott, Russell L, Seibt, Ulli, Silver, Whendee L, Sun, Wu, Szutu, Daphne, Takagi, Kentaro, Takagi, Masahiro, Teramoto, Munemasa, Tjoelker, Mark G, Trumbore, Susan, Ueyama, Masahito, Vargas, Rodrigo, Varner, Ruth K, Verfaillie, Joseph, Vogel, Christoph, Wang, Jinsong, Winston, Greg, Wood, Tana E, Wu, Juying, Wutzler, Thomas, Zeng, Jiye, Zha, Tianshan, Zhang, Quan, and Zou, Junliang

Subjects
Climate Change Impacts and Adaptation, Environmental Sciences, 2.6 Resources and infrastructure (aetiology), Climate Action, Atmosphere, Carbon Dioxide, Ecosystem, Greenhouse Gases, Methane, Nitrous Oxide, Reproducibility of Results, Respiration, Soil, carbon dioxide, greenhouse gases, methane, open data, open science, soil respiration, Biological Sciences, Ecology, Biological sciences, Earth sciences, Environmental sciences
Abstract

Globally, soils store two to three times as much carbon as currently resides in the atmosphere, and it is critical to understand how soil greenhouse gas (GHG) emissions and uptake will respond to ongoing climate change. In particular, the soil-to-atmosphere CO2 flux, commonly though imprecisely termed soil respiration (RS ), is one of the largest carbon fluxes in the Earth system. An increasing number of high-frequency RS measurements (typically, from an automated system with hourly sampling) have been made over the last two decades; an increasing number of methane measurements are being made with such systems as well. Such high frequency data are an invaluable resource for understanding GHG fluxes, but lack a central database or repository. Here we describe the lightweight, open-source COSORE (COntinuous SOil REspiration) database and software, that focuses on automated, continuous and long-term GHG flux datasets, and is intended to serve as a community resource for earth sciences, climate change syntheses and model evaluation. Contributed datasets are mapped to a single, consistent standard, with metadata on contributors, geographic location, measurement conditions and ancillary data. The design emphasizes the importance of reproducibility, scientific transparency and open access to data. While being oriented towards continuously measured RS , the database design accommodates other soil-atmosphere measurements (e.g. ecosystem respiration, chamber-measured net ecosystem exchange, methane fluxes) as well as experimental treatments (heterotrophic only, etc.). We give brief examples of the types of analyses possible using this new community resource and describe its accompanying R software package.

Published
2020

6. Ecosystem services of Chilean sclerophyllous forests and shrublands on the verge of collapse: A review

Author

Smith-Ramírez, Cecilia, Grez, Audrey, Galleguillos, Mauricio, Cerda, Claudia, Ocampo-Melgar, Anahí, Miranda, Marcelo D., Muñoz, Ariel A., Rendón-Funes, Adriana, Díaz, Iván, Cifuentes, Camila, Alaniz, Alberto, Seguel, Oscar, Ovalle, Juan, Montenegro, Gloria, Saldes-Cortés, Andrea, Martínez-Harms, María José, Armesto, Juan J., and Vita, Antonio

Published
2023
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7. Forest hydrology in Chile: Past, present, and future

Author

Balocchi, Francisco, Galleguillos, Mauricio, Rivera, Diego, Stehr, Alejandra, Arumi, Jose Luis, Pizarro, Roberto, Garcia-Chevesich, Pablo, Iroumé, Andrés, Armesto, Juan J., Hervé-Fernández, Pedro, Oyarzún, Carlos, Barría, Pilar, Little, Christian, Mancilla, Gabriel, Yépez, Santiago, Rodriguez, Rolando, White, Don A., Silberstein, Richard P., Neary, Daniel G., and Ramírez de Arellano, Pablo

Published
2023
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11. Earth Stewardship Linking Ecology and Ethics in Theory and Practice /

Author

Rozzi, Ricardo, Armesto, Juan J., Callicott, J. Baird, Chapin III, F. Stuart, May Jr., Roy H., Pickett, S.T.A., Power, Mary E., SpringerLink (Online service), Unknown, Rozzi, Ricardo, Armesto, Juan J., Callicott, J. Baird, Chapin III, F. Stuart, May Jr., Roy H., Pickett, S.T.A., Power, Mary E., and SpringerLink (Online service)

Subjects
Ecology, Ethics, Life sciences, Life Sciences, general
Published
2015

31. Global Biodiversity Scenarios for the Year 2100

Author

Sala, Osvaldo E., Chapin, F. Stuart, Armesto, Juan J., Berlow, Eric, Bloomfield, Janine, Dirzo, Rodolfo, Huber-Sanwald, Elisabeth, Huenneke, Laura F., Jackson, Robert B., Kinzig, Ann, Leemans, Rik, Lodge, David M., Mooney, Harold A., Oesterheld, Martín, Poff, N. LeRoy, Sykes, Martin T., Walker, Brian H., Walker, Marilyn, and Wall, Diana H.

Published
2000

40. Corrigendum to “Forest Hydrology in Chile; paste, present, and future” [J. Hydrol. 616 (2023)]

Author

Balocchi, Francisco, primary, Galleguillos, Mauricio, additional, Rivera, Diego, additional, Stehr, Alejandra, additional, Luis Arumi, Jose, additional, Pizarro, Roberto, additional, Garcia-Chevesich, Pablo, additional, Iroumé, Andrés, additional, Armesto, Juan J., additional, Hervé-Fernández, Pedro, additional, Oyarzún, Carlos, additional, Barria, Pilar, additional, Little, Christian, additional, Mancilla, Gabriel, additional, Yépez, Santiago, additional, Rodriguez, Rolando, additional, White, Don A., additional, Silberstein, Richard P., additional, Neary, Daniel G., additional, and de Arellano, Pablo Ramírez, additional

Published
2023
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48. Ecological Restoration in Mediterranean-Type Shrublands and Woodlands

Author

Mucina, Ladislav, primary, Bustamante-Sánchez, Marcela A., additional, Pedra, Beatriz Duguy, additional, Holmes, Patricia, additional, Keeler-Wolf, Todd, additional, Armesto, Juan J., additional, Dobrowolski, Mark, additional, Gaertner, Mirijam, additional, Smith-Ramírez, Cecilia, additional, and Vilagrosa, Alberto, additional

Published
2017
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49. Drivers of ecosystem water use efficiency in a temperate rainforest and a peatland in southern South America.

Author

Perez-Quezada, Jorge F., Trejo, David, Lopatin, Javier, Aguilera, David, Osborne, Bruce, Galleguillos, Mauricio, Zattera, Luca, Celis-Diez, Juan L., and Armesto, Juan J.

Subjects
WATER efficiency, TEMPERATE rain forests, PEATLAND restoration, STRUCTURAL equation modeling, WATER table, GLOBAL radiation
Abstract

The variability and drivers of carbon and water fluxes and their relationship to ecosystem water use efficiency (WUE) in natural ecosystems of southern South America are still poorly understood. For eight years (2015–2022), we measured water and carbon fluxes using eddy covariance towers in a temperate rainforest and a peatland in southern Chile. Different expressions for ecosystem WUE were derived from estimates of gross primary productivity (GPP) and evapotranspiration (ET), which was further partitioned into evaporation (E) and transpiration (T). We then used the correlation between detrended time series and structural equation modeling to identify the main environmental drivers of WUE, GPP, ET, E and T. The results showed that WUE is low in both ecosystems, and likely explained by the high annual precipitation in this region (∼2100 mm). Only expressions of WUE that included atmospheric water demand showed seasonal variation. Variations in WUE were related more to changes in ET than to changes in GPP, while T remained relatively stable accounting for around 47 % of ET for most of the study period. For both ecosystems, E increased with higher global radiation, higher surface conductance and when the water table was closer to the surface. Higher values for E were also found with increased wind speeds in the forest and higher air temperatures in the peatland. The absence of a close relationship between ET and GPP is likely related to the dominance of plant species that either do not have stomata (i.e., mosses in the peatland or epiphytes in the forest) or have poor stomatal control (i.e., anisohydric tree species in the forest). The observed increase in potential ET in the last two decades and the projected drought in this region suggests that WUE could increase in these ecosystems, particularly in the forest, where stomatal control may be more significant. [ABSTRACT FROM AUTHOR]

Published
2023
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