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1. Mismatches between soil and air temperature

Author

Vaccari, Francesco, Seipel, Tim, Kljun, Natascha, Radujković, Dajana, Crowther, Thomas, Grelle, Achim, Mondoni, Andrea, Finckh, Manfred, Wang, Yifeng, Abedi, Mehdi, Simpson, Elizabeth, Verheijen, Frank, Andres, Christian, Assis, Rafael, Descombes, Patrice, Manco, Antonio, Lens , Luc, Pitacco, Andrea, Erfanian, Mohammad, Phoenix, Gareth, Iwata, Hiroki, de Andrade, Ana, Medinets, Sergiy, Dušek, Jiří, Bruna, Josef, Svoboda, Miroslav, Aalto, Juha, Buysse, Pauline, Lynn , Joshua, Hylander, Kristoffer, Rubtsov, Alexey, Macek, Martin, Freeman, Erika, Venn, Susanna, Bauters, Marijn, Puchalka, Radoslaw, Feigenwinter, Iris, Mackenzie, Roy, Tanneberger, Franziska, Normand, Signe, Tomaselli, Marcello, Okello, Joseph, Alatalo, Juha, Scharnweber, Tobias, Aerts, Rien, Wang, Runxi, Meysman, Filip, Jónsdóttir, Ingibjörg, Dimarco, Romina, Vandvik , Vigdis, Penczykowski, Rachel, Guénard, Benoit, Nouvellon, Yann, Spasojevic, Marko, Svátek, Martin, Barthel, Matti, Stanisci, Angela, Yu, Zicheng, Nuñez, Martin, Cesarz, Simone, Van Meerbeek, Koenraad, Candan, Onur, Jucker, Tommaso, Ahmadian, Negar, Way, Robert, Ashcroft, Michael, Kolle, Olaf, Pitteloud, Camille, Høye, Toke, Montagnani, Leonardo, Vittoz, Pascal, Dolezal, Jiri, Goeckede, Mathias, Schmidt, Marius, Moiseev, Dmitry, Goded, Ignacio, Benito-Alonso, José-Luis, di Cella, Umberto, Convey, Peter, Lorite, Juan, Sagot, Clotilde, Bader, Maaike, Shekhar, Ankit, Porro, Francesco, Jastrzebowski, Szymon, Manca, Giovanni, Helfter, Carole, Exton, Dan, Smith, Stuart, Olejnik, Janusz, Cremonese, Edoardo, Pearse, William, Jump, Alistair, Pastor, Ada, Sarneel, Judith, Matula, Radim, Pauli, Harald, Stemkovski, Michael, Dick, Jan, Lohila, Annalea, Trouillier, Mario, Man, Matěj, Björk, Robert, Sewerniak, Piotr, Géron, Charly, Bon, Matteo, Santos, Cinthya, Curtis, Robin, Kollár, Jozef, Vives-Ingla, Maria, Pio, Casimiro, DIAZ, Jose, Boike, Julia, Basham, Edmund, Liljebladh, Bengt, Rossi, Graziano, Siqueira, David, Mosedale, Jonathan, Varlagin, Andrej, Máliš, František, Laska, Kamil, RENAULT, David, Verbeeck, Hans, Heinesch, Bernard, García, María, Zhang, Zhaochen, Sidenko, Nikita, Poyatos, Rafael, Bjornsdottir, Katrin, Hrbacek, Filip, Andrews, Christopher, Senior, Rebecca, Jactel, Hervé, Wilmking, Martin, Choler, Philippe, Aschero, Valeria, Naujokaitis-Lewis, Ilona, Lamprecht, Andrea, Jimenez, Juan, Khuroo, Anzar, Phartyal, Shyam, Moiseev, Pavel, García, Rafael, Zyryanov, Viacheslav, Kemppinen, Julia, Yang , Yan, Van Geel, Maarten, Nardino, Marianna, Malfasi, Francesco, Haider, Sylvia, Hamid, Maroof, Leihy, Rachel, de Pablo, Miguel, Rossi, Christian, Urban, Anastasiya, Erschbamer, Brigitta, Bell, Michael, Marchesini, Luca, Urbaniak, Marek, Zong, Shengwei, Ammann, Christof, Bahalkeh, Khadijeh, Smiljanic, Marko, Uogintas, Domas, Xenakis, Georgios, Sitková, Zuzana, Stoll, Stefan, Haase, Peter, Hermanutz, Luise, Peichl, Matthias, Altman, Jan, Verbruggen, Erik, Čiliak, Marek, Thomas, Andrew, Assmann, Jakob, Tyystjärvi, Vilna, Panov, Alexey, Milbau, Ann, Nagy, Laszlo, Kelly, Julia, Pärtel, Meelis, Campoe, Otávio, Myers, Jonathan, Muffler, Lena, Juszczak, Radoslaw, Hoffrén, Raúl, Pavelka, Marian, Plichta, Roman, Munoz-Rojas, Miriam, Niittynen, Pekka, Daskalova, Gergana, Maclean, Ilya, Alexander, Jake, Carnicer, Jofre, Herbst, Mathias, Larson, Christian, Cannone, Nicoletta, Arzac, Alberto, Ujházyová, Mariana, Jentsch, Anke, Penuelas, Josep, Nosetto, Marcelo, Chown, Steven, Kanka, Róbert, Walz, Josefine, Rixen, Christian, Fernández-Pascual, Eduardo, Steinbauer, Klaus, Zellweger, Florian, Frei, Esther, Scott, Tony, Erickson, Todd, Luoto, Miska, Wedegärtner, Ronja, Bravo, Jhonatan, Ujházy, Karol, Zhang, Jian, Järveoja, Järvi, Nijs, Ivan, Olesen, Jørgen, Hepenstrick, Daniel, Greenwood, Sarah, Buchmann, Nina, von Oppen, Jonathan, Deronde, Bart, Merinero, Sonia, Semenchuk, Philipp, Myers-Smith, Isla, Steinwandter, Michael, Dengler, Jürgen, Hammerle, Albin, Kovács, Bence, Forte, Tai, Haugum, Siri, Klemedtsson, Leif, Homeier, Jürgen, Calzado, M., Chojnicki, Bogdan, Ardö, Jonas, Scholten, Thomas, Risch, Anita, Robroek, Bjorn, Larson, Keith, Nilsson, Matts, Higgens, Rebecca, Magliulo, Enzo, Gharun, Mana, Fenu, Giuseppe, Herberich, Maximiliane, Newling, Emily, Vangansbeke, Pieter, Orsenigo, Simone, Souza, José, Bokhorst, Stef, Knohl, Alexander, Spicher, Fabien, Di Cecco, Valter, Ogée, Jérôme, Ursu, Tudor-Mihai, Rocha, Adrian, Dorrepaal, Ellen, Björkman, Mats, Kreyling, Juergen, Treier, Urs, van den Hoogen, Johan, Loubet, Benjamin, Opedal, Øystein, Bazzichetto, Manuele, Vitale, Luca, Blonder, Benjamin, Ejtehadi, Hamid, Speed, James, Boeckx, Pascal, Ziemblińska, Klaudia, Dahlberg, C., Carbognani, Michele, Gobin, Anne, Remmers, Wolfram, Arriga, Nicola, Thomas, Haydn, Marciniak, Felipe, Remmele, Sabine, Collier, Laura, Wingate, Lisa, Seeber, Julia, Cooper, Elisabeth, Steinbrecher, Rainer, Barrio, Isabel, Hampe, Arndt, Ogaya, Romà, Michaletz, Sean, Moriana-Armendariz, Mikel, le Maire, Guerric, Abdalaze, Otar, Guillemot, Joannès, Mörsdorf, Martin, Canessa, Rafaella, Tanentzap, Andrew, Backes, Amanda, Poulenard, Jérôme, De Frenne, Pieter, Graae, Bente, Yu, Kailiang, Palaj, Andrej, Meeussen, Camille, Mazzolari, Ana, Casanova-Katny, Angélica, Manolaki, Paraskevi, Niessner, Armin, Van de Vondel, Stijn, Wohlfahrt, Georg, Fuentes-Lillo, Eduardo, Bailey, Joseph, Petraglia, Alessandro, Kašpar, Vít, Goulding, Keith, Somers, Ben, Schwartz, Naomi, Smith-Tripp, Sarah, Lenoir, Jonathan, de Cássia Guimarães Mesquita, Rita, Aartsma, Peter, Urban, Josef, Eklundh, Lars, Roupsard, Olivier, Curasi, Salvatore, Greise, Caroline, Ferlian, Olga, Randall, Krystal, Camargo, José, Meusburger, Katrin, Siebicke, Lukas, Ueyama, Masahito, Eisenhauer, Nico, Brum, Barbara, Kotowska, Martyna, Stiegler, Christian, Kazakis, George, Hörtnagl, Lukas, Berauer, Bernd, Jackowicz-Korczynski, Marcin, Winkler, Manuela, Hik, David, Pauchard, Aníbal, Fazlioglu, Fatih, Contador, Tamara, Turtureanu, Pavel, Souza, Bartolomeu, Manise, Tanguy, Cutini, Maurizio, Benavides, Juan, Stephan, Jörg, Tutton, Rosamond, Di Musciano, Michele, Barros, Agustina, Kopecký, Martin, Della Chiesa, Stefano, Ghosn, Dany, Haesen, Stef, Ahrends, Antje, Wipf, Sonja, Zimmermann, Reiner, Tagesson, Torbern, Maier, Regine, Wild, Jan, Tielbörger, Katja, Zhao, Peng, Prokushkin, Anatoly, Kobler, Johannes, Klisz, Marcin, Pușcaș, Mihai, Veen, G., Villar, Luis, Bjerke, Jarle, Wilkinson, Matthew, Allonsius, Camille, Dias, Arildo, Six, Johan, Gigauri, Khatuna, Pampuch, Timo, Theurillat, Jean-Paul, Cifuentes, Edgar, Portillo-Estrada, Miguel, Hederová, Lucia, Klinges, David, Govaert, Sanne, Scheffers, Brett, Eugster, Werner, Guglielmin, Mauro, Medinets, Volodymyr, Lang, Simone, Pellissier, Loïc, Niedrist, Georg, Fanin, Nicolas, Nicklas, Lena, Schmeddes, Jonas, Veenendaal, Elmar, Barančok, Peter, Weigel, Robert, van den Brink, Liesbeth, Sørensen, Mia, Gottschall, Felix, Ewers, Robert, Halbritter, Aud, and Lembrechts, Jonas

Subjects
bepress|Physical Sciences and Mathematics, bepress|Physical Sciences and Mathematics|Earth Sciences|Soil Science, bepress|Life Sciences, bepress|Physical Sciences and Mathematics|Oceanography and Atmospheric Sciences and Meteorology|Climate, bepress|Physical Sciences and Mathematics|Oceanography and Atmospheric Sciences and Meteorology, bepress|Physical Sciences and Mathematics|Earth Sciences, bepress|Physical Sciences and Mathematics|Environmental Sciences, bepress|Life Sciences|Ecology and Evolutionary Biology, bepress|Physical Sciences and Mathematics|Environmental Sciences|Environmental Monitoring
Abstract

Research in environmental science relies heavily on global climatic grids derived from estimates of air temperature at around 2 meter above ground1-3. These climatic grids however fail to reflect conditions near and below the soil surface, where critical ecosystem functions such as soil carbon storage are controlled and most biodiversity resides4-8. By using soil temperature time series from over 8500 locations across all of the world’s terrestrial biomes4, we derived global maps of soil temperature-related variables at 1 km resolution for the 0–5 and 5–15 cm depth horizons. Based on these maps, we show that mean annual soil temperature differs markedly from the corresponding 2 m gridded air temperature, by up to 10°C, with substantial variation across biomes and seasons. Soils in cold and/or dry biomes are annually substantially warmer (3.6°C ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are slightly cooler (0.7 ± 2.3°C). As a result, annual soil temperature varies less (by 17%) across the globe than air temperature. The effect of macroclimatic conditions on the difference between soil and air temperature highlights the importance of considering that macroclimate warming may not result in the same level of soil temperature warming. Similarly, changes in precipitation could alter the relationship between soil and air temperature, with implications for soil-atmosphere feedbacks9. Our results underpin that the impacts of climate and climate change on biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments.

Published
2021

2. Evolutionary and ecological processes influencing chemical defense variation in an aposematic and mimetic Heliconius butterfly

Author

Mattila, Anniina L. K., Jiggins, Chris D., Opedal, Øystein H., Montejo-Kovacevich, Gabriela, Pinheiro de castro, Érika C., McMillan, W. Owen, Bacquet, Caroline, Saastamoinen, Marjo, Jiggins, Chris [0000-0002-7809-062X], Apollo - University of Cambridge Repository, Helsinki Institute of Life Science HiLIFE, Organismal and Evolutionary Biology Research Programme, Research Centre for Ecological Change, Life-history Evolution Research Group, University Management, and Plant Adaptation and Conservation

Subjects
Maternal effects, Passiflora, SEQUESTRATION, Cyanogenic glucosides, WARNING-COLOR, Aposematism, HERBIVORE DIET, Mimicry, PREDATORS, RESOURCE-ALLOCATION, Chemical defenses, Ecology, Population Biology, Heliconius, Environmental gradients, Biodiversity, Evolutionary Studies, NATURAL-SELECTION, MUELLERIAN MIMICRY, 1181 Ecology, evolutionary biology, Medicine, Evolvability, Entomology, COSTS, MULLERIAN MIMICRY
Abstract

Chemical defences against predators underlie the evolution of aposematic coloration and mimicry, which are classic examples of adaptive evolution. Surprisingly little is known about the roles of ecological and evolutionary processes maintaining defence variation, and how they may feedback to shape the evolutionary dynamics of species. Cyanogenic Heliconius butterflies exhibit diverse warning color patterns and mimicry, thus providing a useful framework for investigating these questions. We studied intraspecific variation in de novo biosynthesized cyanogenic toxicity and its potential ecological and evolutionary sources in wild populations of Heliconius erato along environmental gradients, in common-garden broods and with feeding treatments. Our results demonstrate substantial intraspecific variation, including detectable variation among broods reared in a common garden. The latter estimate suggests considerable evolutionary potential in this trait, although predicting the response to selection is likely complicated due to the observed skewed distribution of toxicity values and the signatures of maternal contributions to the inheritance of toxicity. Larval diet contributed little to toxicity variation. Furthermore, toxicity profiles were similar along steep rainfall and altitudinal gradients, providing little evidence for these factors explaining variation in biosynthesized toxicity in natural populations. In contrast, there were striking differences in the chemical profiles of H. erato from geographically distant populations, implying potential local adaptation in the acquisition mechanisms and levels of defensive compounds. The results highlight the extensive variation and potential for adaptive evolution in defense traits for aposematic and mimetic species, which may contribute to the high diversity often found in these systems.

Published
2021

3. Global maps of soil temperature

Author

Lembrechts, Jonas J, Van Den Hoogen, Johan, Aalto, Juha, Ashcroft, Michael B, De Frenne, Pieter, Kemppinen, Julia, Kopecký, Martin, Luoto, Miska, Maclean, Ilya MD, Crowther, Thomas W, Bailey, Joseph J, Haesen, Stef, Klinges, David H, Niittynen, Pekka, Scheffers, Brett R, Van Meerbeek, Koenraad, Aartsma, Peter, Abdalaze, Otar, Abedi, Mehdi, Aerts, Rien, Ahmadian, Negar, Ahrends, Antje, Alatalo, Juha M, Alexander, Jake M, Allonsius, Camille Nina, Altman, Jan, Ammann, Christof, Andres, Christian, Andrews, Christopher, Ardö, Jonas, Arriga, Nicola, Arzac, Alberto, Aschero, Valeria, Assis, Rafael L, Assmann, Jakob Johann, Bader, Maaike Y, Bahalkeh, Khadijeh, Barančok, Peter, Barrio, Isabel C, Barros, Agustina, Barthel, Matti, Basham, Edmund W, Bauters, Marijn, Bazzichetto, Manuele, Marchesini, Luca Belelli, Bell, Michael C, Benavides, Juan C, Benito Alonso, José Luis, Berauer, Bernd J, Bjerke, Jarle W, Björk, Robert G, Björkman, Mats P, Björnsdóttir, Katrin, Blonder, Benjamin, Boeckx, Pascal, Boike, Julia, Bokhorst, Stef, Brum, Bárbara NS, Brůna, Josef, Buchmann, Nina, Buysse, Pauline, Camargo, José Luís, Campoe, Otávio C, Candan, Onur, Canessa, Rafaella, Cannone, Nicoletta, Carbognani, Michele, Carnicer, Jofre, Casanova-Katny, Angélica, Cesarz, Simone, Chojnicki, Bogdan, Choler, Philippe, Chown, Steven L, Cifuentes, Edgar F, Čiliak, Marek, Contador, Tamara, Convey, Peter, Cooper, Elisabeth J, Cremonese, Edoardo, Curasi, Salvatore R, Curtis, Robin, Cutini, Maurizio, Dahlberg, C Johan, Daskalova, Gergana N, De Pablo, Miguel Angel, Della Chiesa, Stefano, Dengler, Jürgen, Deronde, Bart, Descombes, Patrice, Di Cecco, Valter, Di Musciano, Michele, Dick, Jan, Dimarco, Romina D, Dolezal, Jiri, Dorrepaal, Ellen, Dušek, Jiří, Eisenhauer, Nico, Eklundh, Lars, Erickson, Todd E, Erschbamer, Brigitta, Eugster, Werner, Ewers, Robert M, Exton, Dan A, Fanin, Nicolas, Fazlioglu, Fatih, Feigenwinter, Iris, Fenu, Giuseppe, Ferlian, Olga, Fernández Calzado, M Rosa, Fernández-Pascual, Eduardo, Finckh, Manfred, Higgens, Rebecca Finger, Forte, T'ai GW, Freeman, Erika C, Frei, Esther R, Fuentes-Lillo, Eduardo, García, Rafael A, García, María B, Géron, Charly, Gharun, Mana, Ghosn, Dany, Gigauri, Khatuna, Gobin, Anne, Goded, Ignacio, Goeckede, Mathias, Gottschall, Felix, Goulding, Keith, Govaert, Sanne, Graae, Bente Jessen, Greenwood, Sarah, Greiser, Caroline, Grelle, Achim, Guénard, Benoit, Guglielmin, Mauro, Guillemot, Joannès, Haase, Peter, Haider, Sylvia, Halbritter, Aud H, Hamid, Maroof, Hammerle, Albin, Hampe, Arndt, Haugum, Siri V, Hederová, Lucia, Heinesch, Bernard, Helfter, Carole, Hepenstrick, Daniel, Herberich, Maximiliane, Herbst, Mathias, Hermanutz, Luise, Hik, David S, Hoffrén, Raúl, Homeier, Jürgen, Hörtnagl, Lukas, Høye, Toke T, Hrbacek, Filip, Hylander, Kristoffer, Iwata, Hiroki, Jackowicz-Korczynski, Marcin Antoni, Jactel, Hervé, Järveoja, Järvi, Jastrzębowski, Szymon, Jentsch, Anke, Jiménez, Juan J, Jónsdóttir, Ingibjörg S, Jucker, Tommaso, Jump, Alistair S, Juszczak, Radoslaw, Kanka, Róbert, Kašpar, Vít, Kazakis, George, Kelly, Julia, Khuroo, Anzar A, Klemedtsson, Leif, Klisz, Marcin, Kljun, Natascha, Knohl, Alexander, Kobler, Johannes, Kollár, Jozef, Kotowska, Martyna M, Kovács, Bence, Kreyling, Juergen, Lamprecht, Andrea, Lang, Simone I, Larson, Christian, Larson, Keith, Laska, Kamil, Le Maire, Guerric, Leihy, Rachel I, Lens, Luc, Liljebladh, Bengt, Lohila, Annalea, Lorite, Juan, Loubet, Benjamin, Lynn, Joshua, Macek, Martin, Mackenzie, Roy, Magliulo, Enzo, Maier, Regine, Malfasi, Francesco, Máliš, František, Man, Matěj, Manca, Giovanni, Manco, Antonio, Manise, Tanguy, Manolaki, Paraskevi, Marciniak, Felipe, Matula, Radim, Mazzolari, Ana Clara, Medinets, Sergiy, Medinets, Volodymyr, Meeussen, Camille, Merinero, Sonia, Mesquita, Rita De Cássia Guimarães, Meusburger, Katrin, Meysman, Filip, Michaletz, Sean T, Milbau, Ann, Moiseev, Dmitry, Moiseev, Pavel, Mondoni, Andrea, Monfries, Ruth, Montagnani, Leonardo, Moriana-Armendariz, Mikel, Morra Di Cella, Umberto, Mörsdorf, Martin, Mosedale, Jonathan R, Muffler, Lena, Muñoz-Rojas, Miriam, Myers, Jonathan A, Myers-Smith, Isla H, Nagy, Laszlo, Nardino, Marianna, Naujokaitis-Lewis, Ilona, Newling, Emily, Nicklas, Lena, Niedrist, Georg, Niessner, Armin, Nilsson, Mats B, Normand, Signe, Nosetto, Marcelo D, Nouvellon, Yann, Nuñez, Martin A, Ogaya, Romà, Ogée, Jérôme, Okello, Joseph, Olejnik, Janusz, Olesen, Jørgen Eivind, Opedal, Øystein H, Orsenigo, Simone, Palaj, Andrej, Pampuch, Timo, Panov, Alexey V, Pärtel, Meelis, Pastor, Ada, Pauchard, Aníbal, Pauli, Harald, Pavelka, Marian, Pearse, William D, Peichl, Matthias, Pellissier, Loïc, Penczykowski, Rachel M, Penuelas, Josep, Petit Bon, Matteo, Petraglia, Alessandro, Phartyal, Shyam S, Phoenix, Gareth K, Pio, Casimiro, Pitacco, Andrea, Pitteloud, Camille, Plichta, Roman, Porro, Francesco, Portillo-Estrada, Miguel, Poulenard, Jérôme, Poyatos, Rafael, Prokushkin, Anatoly S, Puchalka, Radoslaw, Pușcaș, Mihai, Radujković, Dajana, Randall, Krystal, Ratier Backes, Amanda, Remmele, Sabine, Remmers, Wolfram, Renault, David, Risch, Anita C, Rixen, Christian, Robinson, Sharon A, Robroek, Bjorn JM, Rocha, Adrian V, Rossi, Christian, Rossi, Graziano, Roupsard, Olivier, Rubtsov, Alexey V, Saccone, Patrick, Sagot, Clotilde, Sallo Bravo, Jhonatan, Santos, Cinthya C, Sarneel, Judith M, Scharnweber, Tobias, Schmeddes, Jonas, Schmidt, Marius, Scholten, Thomas, Schuchardt, Max, Schwartz, Naomi, Scott, Tony, Seeber, Julia, Segalin De Andrade, Ana Cristina, Seipel, Tim, Semenchuk, Philipp, Senior, Rebecca A, Serra-Diaz, Josep M, Sewerniak, Piotr, Shekhar, Ankit, Sidenko, Nikita V, Siebicke, Lukas, Siegwart Collier, Laura, Simpson, Elizabeth, Siqueira, David P, Sitková, Zuzana, Six, Johan, Smiljanic, Marko, Smith, Stuart W, Smith-Tripp, Sarah, Somers, Ben, Sørensen, Mia Vedel, Souza, José João LL, Souza, Bartolomeu Israel, Souza Dias, Arildo, Spasojevic, Marko J, Speed, James DM, Spicher, Fabien, Stanisci, Angela, Steinbauer, Klaus, Steinbrecher, Rainer, Steinwandter, Michael, Stemkovski, Michael, Stephan, Jörg G, Stiegler, Christian, Stoll, Stefan, Svátek, Martin, Svoboda, Miroslav, Tagesson, Torbern, Tanentzap, Andrew J, Tanneberger, Franziska, Theurillat, Jean-Paul, Thomas, Haydn JD, Thomas, Andrew D, Tielbörger, Katja, Tomaselli, Marcello, Treier, Urs Albert, Trouillier, Mario, Turtureanu, Pavel Dan, Tutton, Rosamond, Tyystjärvi, Vilna A, Ueyama, Masahito, Ujházy, Karol, Ujházyová, Mariana, Uogintas, Domas, Urban, Anastasiya V, Urban, Josef, Urbaniak, Marek, Ursu, Tudor-Mihai, Vaccari, Francesco Primo, Van De Vondel, Stijn, Van Den Brink, Liesbeth, Van Geel, Maarten, Vandvik, Vigdis, Vangansbeke, Pieter, Varlagin, Andrej, Veen, GF, Veenendaal, Elmar, Venn, Susanna E, Verbeeck, Hans, Verbrugggen, Erik, Verheijen, Frank GA, Villar, Luis, Vitale, Luca, Vittoz, Pascal, Vives-Ingla, Maria, Von Oppen, Jonathan, Walz, Josefine, Wang, Runxi, Wang, Yifeng, Way, Robert G, Wedegärtner, Ronja EM, Weigel, Robert, Wild, Jan, Wilkinson, Matthew, Wilmking, Martin, Wingate, Lisa, Winkler, Manuela, Wipf, Sonja, Wohlfahrt, Georg, Xenakis, Georgios, Yang, Yan, Yu, Zicheng, Yu, Kailiang, Zellweger, Florian, Zhang, Jian, Zhang, Zhaochen, Zhao, Peng, Ziemblińska, Klaudia, Zimmermann, Reiner, Zong, Shengwei, Zyryanov, Viacheslav I, Nijs, Ivan, and Lenoir, Jonathan

Subjects
soil temperature, Climate Change, Temperature, soil-dwelling organisms, Microclimate, 15. Life on land, weather stations, near-surface temperatures, Soil, bioclimatic variables, 13. Climate action, temperature offset, global maps, Ecosystem
Abstract

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km2 resolution for 0-5 and 5-15 cm soil depth. These maps were created by calculating the difference (i.e. offset) between in situ soil temperature measurements, based on time series from over 1200 1-km2 pixels (summarized from 8519 unique temperature sensors) across all the world's major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (-0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications.

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