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1. Vulnerability of mineral-associated soil organic carbon to climate across global drylands

Author

Díaz-Martínez, Paloma, Maestre, Fernando T., Moreno-Jiménez, Eduardo, Delgado-Baquerizo, Manuel, Eldridge, David J., Saiz, Hugo, Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Gozalo, Beatriz, Ochoa, Victoria, Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Asensio, Sergio, Berdugo, Miguel, Martínez-Valderrama, Jaime, Mendoza, Betty J., García-Gil, Juan C., Zaccone, Claudio, Panettieri, Marco, García-Palacios, Pablo, Fan, Wei, Benavente-Ferraces, Iria, Rey, Ana, Eisenhauer, Nico, Cesarz, Simone, Abedi, Mehdi, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Aramayo, Valeria, Arroyo, Antonio I., Bahalkeh, Khadijeh, Ben Salem, Farah, Blaum, Niels, Boldgiv, Bazartseren, Bowker, Matthew A., Bran, Donaldo, Branquinho, Cristina, Bu, Chongfeng, Cáceres, Yonatan, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Chibani, Roukaya, Conceição, Abel A., Currier, Courtney M., Darrouzet-Nardi, Anthony, Deák, Balázs, Dickman, Christopher R., Donoso, David A., Dougill, Andrew J., Durán, Jorge, Ejtehadi, Hamid, Espinosa, Carlos, Fajardo, Alex, Farzam, Mohammad, Ferrante, Daniela, Fraser, Lauchlan H., Gaitán, Juan J., Gusman Montalván, Elizabeth, Hernández-Hernández, Rosa M., von Hessberg, Andreas, Hölzel, Norbert, Huber-Sannwald, Elisabeth, Hughes, Frederic M., Jadán-Maza, Oswaldo, Geissler, Katja, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai F., Kindermann, Liana, Koopman, Jessica E., Le Roux, Peter C., Liancourt, Pierre, Linstädter, Anja, Liu, Jushan, Louw, Michelle A., Maggs-Kölling, Gillian, Makhalanyane, Thulani P., Issa, Oumarou Malam, Marais, Eugene, Margerie, Pierre, Mazaneda, Antonio J., McClaran, Mitchel P., Messeder, João Vitor S., Mora, Juan P., Moreno, Gerardo, Munson, Seth M., Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón R., Osborne, Brooke, Peter, Guadalupe, Pueyo, Yolanda, Quiroga, R. Emiliano, Reed, Sasha C., Reyes, Victor M., Rodríguez, Alexandra, Ruppert, Jan C., Sala, Osvaldo, Salah, Ayman, Sebei, Julius, Sloan, Michael, Solongo, Shijirbaatar, Stavi, Ilan, Stephens, Colton R. A., Teixido, Alberto L., Thomas, Andrew D., Throop, Heather L., Tielbörger, Katja, Travers, Samantha, Val, James, Valko, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, Wamiti, Wanyoike, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Zeberio, Juan M., Zhang, Yuanming, Zhou, Xiaobing, and Plaza, César

Published
2024
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2. Hotspots of biogeochemical activity linked to aridity and plant traits across global drylands

Author

Eldridge, David J., Ding, Jingyi, Dorrough, Josh, Delgado-Baquerizo, Manuel, Sala, Osvaldo, Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Mallen-Cooper, Max, Saiz, Hugo, Asensio, Sergio, Ochoa, Victoria, Gozalo, Beatriz, Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Martínez-Valderrama, Jaime, Plaza, César, Abedi, Mehdi, Ahmadian, Negar, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Azevedo, Luísa, Ben Salem, Farah, Berdugo, Miguel, Blaum, Niels, Boldgiv, Bazartseren, Bowker, Matthew, Bran, Donaldo, Bu, Chongfeng, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Cesarz, Simone, Chibani, Roukaya, Conceição, Abel Augusto, Darrouzet-Nardi, Anthony, Davila, Yvonne C., Deák, Balázs, Díaz-Martínez, Paloma, Donoso, David A., Dougill, Andrew David, Durán, Jorge, Eisenhauer, Nico, Ejtehadi, Hamid, Espinosa, Carlos Ivan, Fajardo, Alex, Farzam, Mohammad, Foronda, Ana, Franzese, Jorgelina, Fraser, Lauchlan H., Gaitán, Juan, Geissler, Katja, Gonzalez, Sofía Laura, Gusman-Montalvan, Elizabeth, Hernández, Rosa Mary, Hölzel, Norbert, Hughes, Frederic Mendes, Jadan, Oswaldo, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai F., Köbel, Melanie, Lehmann, Anika, Liancourt, Pierre, Linstädter, Anja, Louw, Michelle A., Ma, Quanhui, Mabaso, Mancha, Maggs-Kölling, Gillian, Makhalanyane, Thulani P., Issa, Oumarou Malam, Marais, Eugene, McClaran, Mitchel, Mendoza, Betty, Mokoka, Vincent, Mora, Juan P., Moreno, Gerardo, Munson, Seth, Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón R., Osborne, Brooke, Peter, Guadalupe, Pierre, Margerie, Pueyo, Yolanda, Emiliano Quiroga, R., Reed, Sasha, Rey, Ana, Rey, Pedro, Gómez, Víctor Manuel Reyes, Rolo, Víctor, Rillig, Matthias C., le Roux, Peter C., Ruppert, Jan Christian, Salah, Ayman, Sebei, Phokgedi Julius, Sharkhuu, Anarmaa, Stavi, Ilan, Stephens, Colton, Teixido, Alberto L., Thomas, Andrew David, Tielbörger, Katja, Robles, Silvia Torres, Travers, Samantha, Valkó, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, von Heßberg, Andreas, Wamiti, Wanyoike, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Zhang, Yuanming, Zhou, Xiaobing, and Maestre, Fernando T.

Published
2024
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3. Biodiversity and Ecosystem Functions in Southern African Savanna Rangelands: Threats, Impacts and Solutions

Author

Geißler, Katja, Blaum, Niels, von Maltitz, Graham P., Smith, Taylor, Bookhagen, Bodo, Wanke, Heike, Hipondoka, Martin, Hamunyelae, Eliakim, Lohmann, Dirk, Lüdtke, Deike U., Mbidzo, Meed, Rauchecker, Markus, Hering, Robert, Irob, Katja, Tietjen, Britta, Marquart, Arnim, Skhosana, Felix V., Herkenrath, Tim, Uugulu, Shoopala, Canadell, Josep G., Series Editor, Díaz, Sandra, Series Editor, Heldmaier, Gerhard, Series Editor, Jackson, Robert B., Series Editor, Levia, Delphis F., Series Editor, Schulze, Ernst-Detlef, Series Editor, Sommer, Ulrich, Series Editor, Wardle, David A., Series Editor, von Maltitz, Graham P., editor, Midgley, Guy F., editor, Veitch, Jennifer, editor, Brümmer, Christian, editor, Rötter, Reimund P., editor, Viehberg, Finn A., editor, and Veste, Maik, editor

Published
2024
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4. Biodiversity and Ecosystem Functions in Southern African Savanna Rangelands: Threats, Impacts and Solutions

Author

Geißler, Katja, primary, Blaum, Niels, additional, von Maltitz, Graham P., additional, Smith, Taylor, additional, Bookhagen, Bodo, additional, Wanke, Heike, additional, Hipondoka, Martin, additional, Hamunyelae, Eliakim, additional, Lohmann, Dirk, additional, Lüdtke, Deike U., additional, Mbidzo, Meed, additional, Rauchecker, Markus, additional, Hering, Robert, additional, Irob, Katja, additional, Tietjen, Britta, additional, Marquart, Arnim, additional, Skhosana, Felix V., additional, Herkenrath, Tim, additional, and Uugulu, Shoopala, additional

Published
2024
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5. Author Correction: Hotspots of biogeochemical activity linked to aridity and plant traits across global drylands

Author

Eldridge, David J., Ding, Jingyi, Dorrough, Josh, Delgado-Baquerizo, Manuel, Sala, Osvaldo, Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Mallen-Cooper, Max, Saiz, Hugo, Asensio, Sergio, Ochoa, Victoria, Gozalo, Beatriz, Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Martínez-Valderrama, Jaime, Plaza, César, Abedi, Mehdi, Ahmadian, Negar, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Azevedo, Luísa, Ben Salem, Farah, Berdugo, Miguel, Blaum, Niels, Boldgiv, Bazartseren, Bowker, Matthew, Bran, Donaldo, Bu, Chongfeng, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Cesarz, Simone, Chibani, Roukaya, Conceição, Abel Augusto, Darrouzet-Nardi, Anthony, Davila, Yvonne C., Deák, Balázs, Díaz-Martínez, Paloma, Donoso, David A., Dougill, Andrew David, Durán, Jorge, Eisenhauer, Nico, Ejtehadi, Hamid, Espinosa, Carlos Ivan, Fajardo, Alex, Farzam, Mohammad, Foronda, Ana, Franzese, Jorgelina, Fraser, Lauchlan H., Gaitán, Juan, Geissler, Katja, Gonzalez, Sofía Laura, Gusman-Montalvan, Elizabeth, Hernández, Rosa Mary, Hölzel, Norbert, Hughes, Frederic Mendes, Jadan, Oswaldo, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai F., Köbel, Melanie, Lehmann, Anika, Liancourt, Pierre, Linstädter, Anja, Louw, Michelle A., Ma, Quanhui, Mabaso, Mancha, Maggs-Kölling, Gillian, Makhalanyane, Thulani P., Issa, Oumarou Malam, Marais, Eugene, McClaran, Mitchel, Mendoza, Betty, Mokoka, Vincent, Mora, Juan P., Moreno, Gerardo, Munson, Seth, Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón R., Osborne, Brooke, Peter, Guadalupe, Pierre, Margerie, Pueyo, Yolanda, Emiliano Quiroga, R., Reed, Sasha, Rey, Ana, Rey, Pedro, Gómez, Víctor Manuel Reyes, Rolo, Víctor, Rillig, Matthias C., le Roux, Peter C., Ruppert, Jan Christian, Salah, Ayman, Sebei, Phokgedi Julius, Sharkhuu, Anarmaa, Stavi, Ilan, Stephens, Colton, Teixido, Alberto L., Thomas, Andrew David, Tielbörger, Katja, Robles, Silvia Torres, Travers, Samantha, Valkó, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, von Heßberg, Andreas, Wamiti, Wanyoike, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Zhang, Yuanming, Zhou, Xiaobing, and Maestre, Fernando T.

Published
2024
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8. Vulnerability of mineral-associated soil organic carbon to climate across global drylands

Author

Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef", Díaz-Martínez, Paloma, Maestre, Fernando T., Moreno Jiménez, Eduardo, Delgado-Baquerizo, Manuel, Eldridge, David J., Saiz, Hugo, Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Gozalo, Beatriz, Ochoa, Victoria, Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Asensio, Sergio, Berdugo, Miguel, Martínez-Valderrama, Jaime, Mendoza, Betty J., García-Gil, Juan C., Zaccone, Claudio, Panettieri, Marco, García-Palacios, Pablo, Fan, Wei, Benavente-Ferraces, Iria, Rey, Ana, Eisenhauer, Nico, Cesarz, Simone, Abedi, Mehdi, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Aramayo, Valeria, Arroyo, Antonio I., Bahalkeh, Khadijeh, Ben Salem, Farah, Blaum, Niels, Boldgiv, Bazartseren, Bowker, Matthew A., Bran, Donaldo E., Branquinho, Cristina, Bu, Chongfeng, Cáceres, Yonatan, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Chibani, Roukaya, Conceição, Abel A., Currier, Courtney M., Darrouzet-Nardi, Anthony, Deák, Balázs, Dickman, Christopher R., Donoso, David A., Dougill, Andrew J., Durán, Jorge, Ejtehadi, Hamid, Espinosa, Carlos Iván, Fajardo, Alex, Farzam, Mohammad, Ferrante, Daniela, Fraser, Lauchlan H., Gaitán, Juan J., Gusman Montalván, Elizabeth, Hernández-Hernández, Rosa M., von Hessberg, Andreas, Hölzel, Norbert, Huber-Sannwald, Elisabeth, Hughes, Frederic M., Jadán-Maza, Oswaldo, Geissler, Katja, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai F., Kindermann, Liana, Koopman, Jessica E., Le Roux, Peter C., Liancourt, Pierre, Linstädter, Anja, Liu, Jushan, Louw, Michelle A., Maggs-Kölling, Gillian, Makhalanyane, Thulani P., Malam Issa, Oumarou, Marais, Eugene, Margerie, Pierre, Mazaneda, Antonio J., McClaran, Mitchel, Messeder, João Vitor S., Mora, Juan P., Moreno, Gerardo, Munson, Seth M., Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón R., Osborne, Brooke, Peter, Guadalupe, Pueyo, Yolanda, Quiroga, R. Emiliano, Reed, Sasha C., Reyes, Victor M., Rodríguez, Alexandra, Ruppert, Jan C., Sala, Osvaldo, Salah, Ayman, Sebei, Phokgedi Julius, Sloan, Michael, Solongo, Shijirbaatar, Stavi, Ilan, Stephens, Colton R.A., Teixido, Alberto L., Thomas, Andrew D., Throop, Heather L., Tielbörger, Katja, Travers, Samantha K., Val, James, Valko, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, Wamiti, Wanyoike, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Zeberio, Juan M., Zhang, Yuanming, Zhou, Xiaobing, Plaza, César, Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef", Díaz-Martínez, Paloma, Maestre, Fernando T., Moreno Jiménez, Eduardo, Delgado-Baquerizo, Manuel, Eldridge, David J., Saiz, Hugo, Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Gozalo, Beatriz, Ochoa, Victoria, Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Asensio, Sergio, Berdugo, Miguel, Martínez-Valderrama, Jaime, Mendoza, Betty J., García-Gil, Juan C., Zaccone, Claudio, Panettieri, Marco, García-Palacios, Pablo, Fan, Wei, Benavente-Ferraces, Iria, Rey, Ana, Eisenhauer, Nico, Cesarz, Simone, Abedi, Mehdi, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Aramayo, Valeria, Arroyo, Antonio I., Bahalkeh, Khadijeh, Ben Salem, Farah, Blaum, Niels, Boldgiv, Bazartseren, Bowker, Matthew A., Bran, Donaldo E., Branquinho, Cristina, Bu, Chongfeng, Cáceres, Yonatan, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Chibani, Roukaya, Conceição, Abel A., Currier, Courtney M., Darrouzet-Nardi, Anthony, Deák, Balázs, Dickman, Christopher R., Donoso, David A., Dougill, Andrew J., Durán, Jorge, Ejtehadi, Hamid, Espinosa, Carlos Iván, Fajardo, Alex, Farzam, Mohammad, Ferrante, Daniela, Fraser, Lauchlan H., Gaitán, Juan J., Gusman Montalván, Elizabeth, Hernández-Hernández, Rosa M., von Hessberg, Andreas, Hölzel, Norbert, Huber-Sannwald, Elisabeth, Hughes, Frederic M., Jadán-Maza, Oswaldo, Geissler, Katja, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai F., Kindermann, Liana, Koopman, Jessica E., Le Roux, Peter C., Liancourt, Pierre, Linstädter, Anja, Liu, Jushan, Louw, Michelle A., Maggs-Kölling, Gillian, Makhalanyane, Thulani P., Malam Issa, Oumarou, Marais, Eugene, Margerie, Pierre, Mazaneda, Antonio J., McClaran, Mitchel, Messeder, João Vitor S., Mora, Juan P., Moreno, Gerardo, Munson, Seth M., Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón R., Osborne, Brooke, Peter, Guadalupe, Pueyo, Yolanda, Quiroga, R. Emiliano, Reed, Sasha C., Reyes, Victor M., Rodríguez, Alexandra, Ruppert, Jan C., Sala, Osvaldo, Salah, Ayman, Sebei, Phokgedi Julius, Sloan, Michael, Solongo, Shijirbaatar, Stavi, Ilan, Stephens, Colton R.A., Teixido, Alberto L., Thomas, Andrew D., Throop, Heather L., Tielbörger, Katja, Travers, Samantha K., Val, James, Valko, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, Wamiti, Wanyoike, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Zeberio, Juan M., Zhang, Yuanming, Zhou, Xiaobing, and Plaza, César

Abstract

Mineral-associated organic carbon (MAOC) constitutes a major fraction of global soil carbon and is assumed less sensitive to climate than particulate organic carbon (POC) due to protection by minerals. Despite its importance for long-term carbon storage, the response of MAOC to changing climates in drylands, which cover more than 40% of the global land area, remains unexplored. Here we assess topsoil organic carbon fractions across global drylands using a standardized field survey in 326 plots from 25 countries and 6 continents. We find that soil biogeochemistry explained the majority of variation in both MAOC and POC. Both carbon fractions decreased with increases in mean annual temperature and reductions in precipitation, with MAOC responding similarly to POC. Therefore, our results suggest that ongoing climate warming and aridification may result in unforeseen carbon losses across global drylands, and that the protective role of minerals may not dampen these effects.

Published
2024

9. Hotspots of biogeochemical activity linked to aridity and plant traits across global drylands

Author

Universidad de Alicante. Departamento de Ecología, Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef", Eldridge, David J., Ding, Jingyi, Dorrough, Josh, Delgado-Baquerizo, Manuel, Sala, Osvaldo, Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Mallen-Cooper, Max, Saiz, Hugo, Asensio, Sergio, Ochoa, Victoria, Stephens, Colton R.A., Teixido, Alberto L., Thomas, Andrew D., Tielbörger, Katja, Torres Robles, Silvia, Travers, Samantha K., Valkó, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, von Heßberg, Andreas, Gozalo, Beatriz, Wamiti, Wanyoike, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Zhang, Yuanming, Zhou, Xiaobing, Maestre, Fernando T., Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Martínez-Valderrama, Jaime, Plaza, César, Abedi, Mehdi, Ahmadian, Negar, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Azevedo, Luísa, Ben Salem, Farah, Berdugo, Miguel, Blaum, Niels, Boldgiv, Bazartseren, Bowker, Matthew A., Bran, Donaldo E., Bu, Chongfeng, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Cesarz, Simone, Chibani, Roukaya, Conceição, Abel A., Darrouzet-Nardi, Anthony, Davila, Yvonne C., Deák, Balázs, Díaz-Martínez, Paloma, Donoso, David A., Dougill, Andrew David, Durán, Jorge, Eisenhauer, Nico, Ejtehadi, Hamid, Espinosa, Carlos Iván, Fajardo, Alex, Farzam, Mohammad, Foronda, Ana, Franzese, Jorgelina, Fraser, Lauchlan H., Gaitán, Juan J., Geissler, Katja, Gonzalez, Sofía Laura, Gusmán-Montalván, Elizabeth, Hernández, Rosa M., Hölzel, Norbert, Hughes, Frederic M., Jadán-Maza, Oswaldo, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai F., Köbel, Melanie, Lehmann, Anika, Liancourt, Pierre, Linstädter, Anja, Louw, Michelle A., Ma, Quanhui, Mabaso, Mancha, Maggs-Kölling, Gillian, Makhalanyane, Thulani P., Malam Issa, Oumarou, Marais, Eugene, McClaran, Mitchel, Mendoza, Betty J., Mokoka, Vincent, Mora, Juan P., Moreno, Gerardo, Munson, Seth M., Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón R., Osborne, Brooke, Peter, Guadalupe, Pierre, Margerie, Pueyo, Yolanda, Quiroga, R. Emiliano, Reed, Sasha C., Rey, Ana, Rey, Pedro J., Reyes Gómez, Víctor Manuel, Rolo, Víctor, Rillig, Matthias C., le Roux, Peter C., Ruppert, Jan C., Salah, Ayman, Sebei, Phokgedi Julius, Sharkhuu, Anarmaa, Stavi, Ilan, Universidad de Alicante. Departamento de Ecología, Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef", Eldridge, David J., Ding, Jingyi, Dorrough, Josh, Delgado-Baquerizo, Manuel, Sala, Osvaldo, Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Mallen-Cooper, Max, Saiz, Hugo, Asensio, Sergio, Ochoa, Victoria, Stephens, Colton R.A., Teixido, Alberto L., Thomas, Andrew D., Tielbörger, Katja, Torres Robles, Silvia, Travers, Samantha K., Valkó, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, von Heßberg, Andreas, Gozalo, Beatriz, Wamiti, Wanyoike, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Zhang, Yuanming, Zhou, Xiaobing, Maestre, Fernando T., Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Martínez-Valderrama, Jaime, Plaza, César, Abedi, Mehdi, Ahmadian, Negar, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Azevedo, Luísa, Ben Salem, Farah, Berdugo, Miguel, Blaum, Niels, Boldgiv, Bazartseren, Bowker, Matthew A., Bran, Donaldo E., Bu, Chongfeng, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Cesarz, Simone, Chibani, Roukaya, Conceição, Abel A., Darrouzet-Nardi, Anthony, Davila, Yvonne C., Deák, Balázs, Díaz-Martínez, Paloma, Donoso, David A., Dougill, Andrew David, Durán, Jorge, Eisenhauer, Nico, Ejtehadi, Hamid, Espinosa, Carlos Iván, Fajardo, Alex, Farzam, Mohammad, Foronda, Ana, Franzese, Jorgelina, Fraser, Lauchlan H., Gaitán, Juan J., Geissler, Katja, Gonzalez, Sofía Laura, Gusmán-Montalván, Elizabeth, Hernández, Rosa M., Hölzel, Norbert, Hughes, Frederic M., Jadán-Maza, Oswaldo, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai F., Köbel, Melanie, Lehmann, Anika, Liancourt, Pierre, Linstädter, Anja, Louw, Michelle A., Ma, Quanhui, Mabaso, Mancha, Maggs-Kölling, Gillian, Makhalanyane, Thulani P., Malam Issa, Oumarou, Marais, Eugene, McClaran, Mitchel, Mendoza, Betty J., Mokoka, Vincent, Mora, Juan P., Moreno, Gerardo, Munson, Seth M., Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón R., Osborne, Brooke, Peter, Guadalupe, Pierre, Margerie, Pueyo, Yolanda, Quiroga, R. Emiliano, Reed, Sasha C., Rey, Ana, Rey, Pedro J., Reyes Gómez, Víctor Manuel, Rolo, Víctor, Rillig, Matthias C., le Roux, Peter C., Ruppert, Jan C., Salah, Ayman, Sebei, Phokgedi Julius, Sharkhuu, Anarmaa, and Stavi, Ilan

Abstract

Perennial plants create productive and biodiverse hotspots, known as fertile islands, beneath their canopies. These hotspots largely determine the structure and functioning of drylands worldwide. Despite their ubiquity, the factors controlling fertile islands under conditions of contrasting grazing by livestock, the most prevalent land use in drylands, remain virtually unknown. Here we evaluated the relative importance of grazing pressure and herbivore type, climate and plant functional traits on 24 soil physical and chemical attributes that represent proxies of key ecosystem services related to decomposition, soil fertility, and soil and water conservation. To do this, we conducted a standardized global survey of 288 plots at 88 sites in 25 countries worldwide. We show that aridity and plant traits are the major factors associated with the magnitude of plant effects on fertile islands in grazed drylands worldwide. Grazing pressure had little influence on the capacity of plants to support fertile islands. Taller and wider shrubs and grasses supported stronger island effects. Stable and functional soils tended to be linked to species-rich sites with taller plants. Together, our findings dispel the notion that grazing pressure or herbivore type are linked to the formation or intensification of fertile islands in drylands. Rather, our study suggests that changes in aridity, and processes that alter island identity and therefore plant traits, will have marked effects on how perennial plants support and maintain the functioning of drylands in a more arid and grazed world.

Published
2024

10. Hotspots of biogeochemical activity linked to aridity and plant traits across global drylands

Author

European Commission, Generalitat Valenciana, Hermon Slade Foundation, National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities (China), Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), National Science Foundation (US), National Research, Development and Innovation Office (Hungary), Federal Ministry of Education and Research (Germany), Asia Foundation, Northern Arizona University, Ferdowsi University of Mashhad, Ministerio de Universidades (España), Eldridge, David J. [0000-0002-2191-486X], Ding, Jingyi [0000-0002-4120-6318], Delgado-Baquerizo, Manuel [0000-0002-6499-576X], Gross, Nicolas [0000-0001-9730-3240], Mallen-Cooper, Max [0000-0002-8799-8728], Ochoa, Victoria [0000-0002-2055-2094], Gozalo, Beatriz [0000-0003-3082-4695], Guirado, Emilio [0000-0001-5348-7391], García-Gómez, Miguel [0000-0003-3148-1495], Valencia, Enrique [0000-0003-3359-0759], Martínez-Valderrama, Jaime [0000-0001-5859-5674], Plaza de Carlos, César [0000-0001-8616-7001], Abedi, Mehdi [0000-0002-1499-0119], Ahmadian , Negar [0000-0003-1191-3019], Ahumada, Rodrigo J. [0000-0002-7246-4459], Alcántara, Julio M. [0000-0002-8003-7844], Amghar, Fateh [0000-0003-0379-7273], Berdugo, Miguel [0000-0003-1053-8907], Blaum, Niels [0000-0001-6807-5162], Boldgiv, Bazartseren [0000-0003-0015-8142], Browker, Matthew A. [0000-0002-5891-0264], Bran, Donaldo [0000-0001-7749-2726], Bu, Chongfeng [0000-0002-5839-7229], Canessa, Rafaella [0000-0002-6979-9880], Castro, Ignacio [0000-0002-7594-6824], Castro-Quezada, Patricio [0000-0002-2366-2256], Cesarz, Simone [0000-0003-2334-5119], Conceição, Abel A. [0000-0001-7461-0133], Darrouzet-Nardi, Anthony [0000-0002-2825-7962], Davila, Yvonne C. [0000-0002-5144-5742], Deák, Balázs [0000-0001-6938-1997], Donoso, David [0000-0002-3408-1457], Dougill, Andrew [0000-0002-3422-8228], Eisenhauer, Nico [0000-0002-0371-6720], Espinosa, Carlos Iván [0000-0002-5330-4505], Fajardo, Alex [0000-0002-2202-6207], Farzam, Mohammad [0000-0003-1947-0187], Fraser, L. H. [0000-0003-3998-5540], Gaitán, Juan J. [0000-0003-2889-1418], Hernández, Rosa M. [0000-0003-0689-8862], Jadán, Oswaldo. [0000-0002-7865-2418], Jentsch, Anke [0000-0002-2345-8300], Kaseke, Kudzai Farai [0000-0002-3856-0711], Köbel, Melanie [0000-0001-8272-7999], Lehmann, Anika [0000-0002-9101-9297], Liancourt, Pierre [0000-0002-3109-8755], Linstädter, Anja [0000-0003-0038-9557], Low, Michelle A. [0000-0002-2148-9752], Maggs Kölling, Gillian [0000-0003-3296-8553], Makhalanyane, Thulani P. [0000-0002-8173-1678], Malam Issa, Oumarou [0000-0001-8357-914X], Marais, Eugene [0000-0001-7155-9942], Mendoza, Betty [0000-0003-1149-7801], Mora, Juan P. [0000-0002-6335-0150], Moreno, Gerardo [0000-0001-8053-2696], Munson, Seth M. [0000-0002-2736-6374], Nunes, Alice [0000-0002-6900-3838], Oliva, Gabriel [0000-0002-7839-8851], Oñatibia, Gastón [0000-0003-2329-6601], Peter, Guadalupe [0000-0002-7792-7045], Pueyo, Yolanda [0000-0001-6970-7790], Quiroga, R Emiliano [0000-0001-9785-451X], Reed, Sasha C. [0000-0002-8597-8619], Rey, Ana [0000-0003-0394-101X], Rey, P.J. [0000-0001-5550-0393], Rolo, Víctor [0000-0001-5854-9512], Rillig, Matthias C. [0000-0003-3541-7853], Le Roux, Peter C. [0000-0002-7941-7444], Salah, Ayman [0000-0003-0596-1292], Stavi, Ilan [0000-0001-9725-0003], Stephens, Colton R. A. [0000-0002-8744-6405], Teixido, Alberto L. [0000-0001-8009-1237], Thomas, Andrew [0000-0002-1360-1687], Travers, Samantha [0000-0002-6252-1667], Valkó, Orsolya [0000-0001-7919-6293], van den Brink, Liesbeth [0000-0003-0313-8147], Velbert, Frederike [0000-0003-0499-3807], von Heßberg, Andreas [0009-0007-0303-3624], Wamiti, Wanyoike [0000-0001-7300-2101], Wang, Deli [0000-0001-6576-9193], Wang, Lixin [0000-0003-0968-1247], Wardle, Glenda M. [0000-0003-0189-1899], Yahdjian, Laura [0000-0002-9635-1221], Zaady, Eli [0000-0002-3304-534X], Yuanming, Zhang [0000-0003-1370-4181], Maestre, Fernando T. [0000-0002-7434-4856], Eldridge, David J., Ding, Jingyi, Dorrough, Josh, Delgado-Baquerizo, Manuel, Sala, O., Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Mallen-Cooper, Max, Sáiz, Hugo, Asensio, Sergio, Ochoa, Victoria, Teixido, Alberto L., Thomas, Andrew, Tielbörger, Katja, Torres Robles, Silvia, Travers, Samantha, Valkó, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, von Heßberg, Andreas, Wamiti, Wanyoike, Gozalo, Beatriz, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Yuanming, Zhang, Zhou, Xiaobing, Maestre, Fernando T., Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Martínez-Valderrama, Jaime, Plaza de Carlos, César, Abedi, Mehdi, Ahmadian , Negar, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Azevedo, Luísa, Ben Salem, Farah, Berdugo, Miguel, Blaum, Niels, Boldgiv, Bazartseren, Browker, Matthew A., Bran, Donaldo, Bu, Chongfeng, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Cesarz, Simone, Chibani, Roukaya, Conceição, Abel A., Darrouzet-Nardi, Anthony, Davila, Yvonne C., Deák, Balázs, Díaz-Martínez, Paloma, Donoso, David, Dougill, Andrew, Durán, Jorge, Eisenhauer, Nico, Ejtehadi, Hamid, Espinosa, Carlos Iván, Fajardo, Alex, Farzam, Mohammad, Foronda, Ana, Franzese, Jorgelina, Fraser, L. H., Gaitán, Juan J., Geissler, Katja, Gonzalez, Sofía Laura, Gusman-Montalvan, Elizabeth, Hölzel, Norbert, Mendes Hughes, Frederic, Jadán, Oswaldo, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai Farai, Köbel, Melanie, Lehmann, Anika, Liancourt, Pierre, Linstädter, Anja, Low, Michelle A., Ma, Quanhui, Mabaso, Mancha, Maggs Kölling, Gillian, Makhalanyane, Thulani P., Malam Issa, Oumarou, Marais, Eugene, McClaran, Mitchel, Mendoza, Betty, Mokoka, Vincent, Mora, Juan P., Moreno, Gerardo, Munson, Seth M., Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón, Osborne, Brooke, Peter, Guadalupe, Pierre, Margerie, Pueyo, Yolanda, Quiroga, R Emiliano, Reed, Sasha C., Rey, Ana, Rey, P.J., Reyes Gómez, Víctor Manuel, Rolo, Víctor, Rillig, Matthias C., Le Roux, Peter C., Ruppert, Jan C., Salah, Ayman, Sebei, Phokgedi Julius, Sharkhuu, Anarmaa, Stavi, Ilan, Stephens, Colton R. A., European Commission, Generalitat Valenciana, Hermon Slade Foundation, National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities (China), Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), National Science Foundation (US), National Research, Development and Innovation Office (Hungary), Federal Ministry of Education and Research (Germany), Asia Foundation, Northern Arizona University, Ferdowsi University of Mashhad, Ministerio de Universidades (España), Eldridge, David J. [0000-0002-2191-486X], Ding, Jingyi [0000-0002-4120-6318], Delgado-Baquerizo, Manuel [0000-0002-6499-576X], Gross, Nicolas [0000-0001-9730-3240], Mallen-Cooper, Max [0000-0002-8799-8728], Ochoa, Victoria [0000-0002-2055-2094], Gozalo, Beatriz [0000-0003-3082-4695], Guirado, Emilio [0000-0001-5348-7391], García-Gómez, Miguel [0000-0003-3148-1495], Valencia, Enrique [0000-0003-3359-0759], Martínez-Valderrama, Jaime [0000-0001-5859-5674], Plaza de Carlos, César [0000-0001-8616-7001], Abedi, Mehdi [0000-0002-1499-0119], Ahmadian , Negar [0000-0003-1191-3019], Ahumada, Rodrigo J. [0000-0002-7246-4459], Alcántara, Julio M. [0000-0002-8003-7844], Amghar, Fateh [0000-0003-0379-7273], Berdugo, Miguel [0000-0003-1053-8907], Blaum, Niels [0000-0001-6807-5162], Boldgiv, Bazartseren [0000-0003-0015-8142], Browker, Matthew A. [0000-0002-5891-0264], Bran, Donaldo [0000-0001-7749-2726], Bu, Chongfeng [0000-0002-5839-7229], Canessa, Rafaella [0000-0002-6979-9880], Castro, Ignacio [0000-0002-7594-6824], Castro-Quezada, Patricio [0000-0002-2366-2256], Cesarz, Simone [0000-0003-2334-5119], Conceição, Abel A. [0000-0001-7461-0133], Darrouzet-Nardi, Anthony [0000-0002-2825-7962], Davila, Yvonne C. [0000-0002-5144-5742], Deák, Balázs [0000-0001-6938-1997], Donoso, David [0000-0002-3408-1457], Dougill, Andrew [0000-0002-3422-8228], Eisenhauer, Nico [0000-0002-0371-6720], Espinosa, Carlos Iván [0000-0002-5330-4505], Fajardo, Alex [0000-0002-2202-6207], Farzam, Mohammad [0000-0003-1947-0187], Fraser, L. H. [0000-0003-3998-5540], Gaitán, Juan J. [0000-0003-2889-1418], Hernández, Rosa M. [0000-0003-0689-8862], Jadán, Oswaldo. [0000-0002-7865-2418], Jentsch, Anke [0000-0002-2345-8300], Kaseke, Kudzai Farai [0000-0002-3856-0711], Köbel, Melanie [0000-0001-8272-7999], Lehmann, Anika [0000-0002-9101-9297], Liancourt, Pierre [0000-0002-3109-8755], Linstädter, Anja [0000-0003-0038-9557], Low, Michelle A. [0000-0002-2148-9752], Maggs Kölling, Gillian [0000-0003-3296-8553], Makhalanyane, Thulani P. [0000-0002-8173-1678], Malam Issa, Oumarou [0000-0001-8357-914X], Marais, Eugene [0000-0001-7155-9942], Mendoza, Betty [0000-0003-1149-7801], Mora, Juan P. [0000-0002-6335-0150], Moreno, Gerardo [0000-0001-8053-2696], Munson, Seth M. [0000-0002-2736-6374], Nunes, Alice [0000-0002-6900-3838], Oliva, Gabriel [0000-0002-7839-8851], Oñatibia, Gastón [0000-0003-2329-6601], Peter, Guadalupe [0000-0002-7792-7045], Pueyo, Yolanda [0000-0001-6970-7790], Quiroga, R Emiliano [0000-0001-9785-451X], Reed, Sasha C. [0000-0002-8597-8619], Rey, Ana [0000-0003-0394-101X], Rey, P.J. [0000-0001-5550-0393], Rolo, Víctor [0000-0001-5854-9512], Rillig, Matthias C. [0000-0003-3541-7853], Le Roux, Peter C. [0000-0002-7941-7444], Salah, Ayman [0000-0003-0596-1292], Stavi, Ilan [0000-0001-9725-0003], Stephens, Colton R. A. [0000-0002-8744-6405], Teixido, Alberto L. [0000-0001-8009-1237], Thomas, Andrew [0000-0002-1360-1687], Travers, Samantha [0000-0002-6252-1667], Valkó, Orsolya [0000-0001-7919-6293], van den Brink, Liesbeth [0000-0003-0313-8147], Velbert, Frederike [0000-0003-0499-3807], von Heßberg, Andreas [0009-0007-0303-3624], Wamiti, Wanyoike [0000-0001-7300-2101], Wang, Deli [0000-0001-6576-9193], Wang, Lixin [0000-0003-0968-1247], Wardle, Glenda M. [0000-0003-0189-1899], Yahdjian, Laura [0000-0002-9635-1221], Zaady, Eli [0000-0002-3304-534X], Yuanming, Zhang [0000-0003-1370-4181], Maestre, Fernando T. [0000-0002-7434-4856], Eldridge, David J., Ding, Jingyi, Dorrough, Josh, Delgado-Baquerizo, Manuel, Sala, O., Gross, Nicolas, Le Bagousse-Pinguet, Yoann, Mallen-Cooper, Max, Sáiz, Hugo, Asensio, Sergio, Ochoa, Victoria, Teixido, Alberto L., Thomas, Andrew, Tielbörger, Katja, Torres Robles, Silvia, Travers, Samantha, Valkó, Orsolya, van den Brink, Liesbeth, Velbert, Frederike, von Heßberg, Andreas, Wamiti, Wanyoike, Gozalo, Beatriz, Wang, Deli, Wang, Lixin, Wardle, Glenda M., Yahdjian, Laura, Zaady, Eli, Yuanming, Zhang, Zhou, Xiaobing, Maestre, Fernando T., Guirado, Emilio, García-Gómez, Miguel, Valencia, Enrique, Martínez-Valderrama, Jaime, Plaza de Carlos, César, Abedi, Mehdi, Ahmadian , Negar, Ahumada, Rodrigo J., Alcántara, Julio M., Amghar, Fateh, Azevedo, Luísa, Ben Salem, Farah, Berdugo, Miguel, Blaum, Niels, Boldgiv, Bazartseren, Browker, Matthew A., Bran, Donaldo, Bu, Chongfeng, Canessa, Rafaella, Castillo-Monroy, Andrea P., Castro, Ignacio, Castro-Quezada, Patricio, Cesarz, Simone, Chibani, Roukaya, Conceição, Abel A., Darrouzet-Nardi, Anthony, Davila, Yvonne C., Deák, Balázs, Díaz-Martínez, Paloma, Donoso, David, Dougill, Andrew, Durán, Jorge, Eisenhauer, Nico, Ejtehadi, Hamid, Espinosa, Carlos Iván, Fajardo, Alex, Farzam, Mohammad, Foronda, Ana, Franzese, Jorgelina, Fraser, L. H., Gaitán, Juan J., Geissler, Katja, Gonzalez, Sofía Laura, Gusman-Montalvan, Elizabeth, Hölzel, Norbert, Mendes Hughes, Frederic, Jadán, Oswaldo, Jentsch, Anke, Ju, Mengchen, Kaseke, Kudzai Farai, Köbel, Melanie, Lehmann, Anika, Liancourt, Pierre, Linstädter, Anja, Low, Michelle A., Ma, Quanhui, Mabaso, Mancha, Maggs Kölling, Gillian, Makhalanyane, Thulani P., Malam Issa, Oumarou, Marais, Eugene, McClaran, Mitchel, Mendoza, Betty, Mokoka, Vincent, Mora, Juan P., Moreno, Gerardo, Munson, Seth M., Nunes, Alice, Oliva, Gabriel, Oñatibia, Gastón, Osborne, Brooke, Peter, Guadalupe, Pierre, Margerie, Pueyo, Yolanda, Quiroga, R Emiliano, Reed, Sasha C., Rey, Ana, Rey, P.J., Reyes Gómez, Víctor Manuel, Rolo, Víctor, Rillig, Matthias C., Le Roux, Peter C., Ruppert, Jan C., Salah, Ayman, Sebei, Phokgedi Julius, Sharkhuu, Anarmaa, Stavi, Ilan, and Stephens, Colton R. A.

Abstract

Perennial plants create productive and biodiverse hotspots, known as fertile islands, beneath their canopies. These hotspots largely determine the structure and functioning of drylands worldwide. Despite their ubiquity, the factors controlling fertile islands under conditions of contrasting grazing by livestock, the most prevalent land use in drylands, remain virtually unknown. Here we evaluated the relative importance of grazing pressure and herbivore type, climate and plant functional traits on 24 soil physical and chemical attributes that represent proxies of key ecosystem services related to decomposition, soil fertility, and soil and water conservation. To do this, we conducted a standardized global survey of 288 plots at 88 sites in 25 countries worldwide. We show that aridity and plant traits are the major factors associated with the magnitude of plant effects on fertile islands in grazed drylands worldwide. Grazing pressure had little influence on the capacity of plants to support fertile islands. Taller and wider shrubs and grasses supported stronger island effects. Stable and functional soils tended to be linked to species-rich sites with taller plants. Together, our findings dispel the notion that grazing pressure or herbivore type are linked to the formation or intensification of fertile islands in drylands. Rather, our study suggests that changes in aridity, and processes that alter island identity and therefore plant traits, will have marked effects on how perennial plants support and maintain the functioning of drylands in a more arid and grazed world.

Published
2024

16. Allometric relationships between sapwood area and shrub dimensions for six common Southern African savanna bush encroacher species: Universal or species‐specific?

Author

Hendler, Roi, Herkenrath, Tim, Shikangalah, Rosemary, Blaum, Niels, and Geissler, Katja

Subjects
SAPWOOD, ECOHYDROLOGY, ALLOMETRIC equations, SAVANNAS, HYDROLOGIC cycle, AREA measurement
Abstract

Southern African savanna rangelands are facing a widespread degradation pattern called bush encroachment. This is associated with implications for various aspects of the water cycle and in particular canopy transpiration. At the individual‐tree scale, it is estimated by scaling sap‐flux density by sapwood area. However, the direct measurement of sapwood area is impracticable at landscape scale and general allometric equations of the West‐Brown‐Enquist (WBE) model relating sapwood area to primary size measures seem to fail for some species and climates. Therefore, we conducted intensive field measurements to establish species‐specific allometric relationships between sapwood area and sizes (stem diameter, crown area) in six dominant shrub species involved in bush encroachment in Namibia (Colophospermum mopane, Senegalia mellifera, Vachellia reficiens, Dichrostachys cinerea, Vachellia nebrownii, Catophractes alexandri). We found strong allometric relationships between sapwood area and stem diameter as well as between sapwood area and crown area for all six species. These relations are largely in line with the WBE theory but still provide estimates that are more accurate. Only in D. cinerea, the sapwood area was significantly smaller than predicted by the WBE theory, which might be caused by a larger need for stabilizing heartwood. Our results are useful to estimate water loss via transpiration at a large scale using remote sensing techniques and can promote our understanding of the ecohydrological conditions that drive species‐specific bush encroachment in savannas. This is particularly important in the light of climate change, which is considered to have major implications on ecohydrological processes in savannas. [ABSTRACT FROM AUTHOR]

Published
2024
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19. How can we bring together empiricists and modellers in functional biodiversity research?

Author

Jeltsch, Florian, Blaum, Niels, Brose, Ulrich, Chipperfield, Joseph D., Clough, Yann, Farwig, Nina, Geissler, Katja, Graham, Catherine H., Grimm, Volker, Hickler, Thomas, Huth, Andreas, May, Felix, Meyer, Katrin M., Pagel, Jörn, Reineking, Björn, Rillig, Matthias C., Shea, Katriona, Schurr, Frank M., Schröder, Boris, Tielbörger, Katja, Weiss, Lina, Wiegand, Kerstin, Wiegand, Thorsten, Wirth, Christian, and Zurell, Damaris

Published
2013
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20. Regulation of Son of sevenless by the membrane-actin linker protein ezrin

Author

Geißler, Katja J., Jung, M. Juliane, Riecken, Lars Björn, Sperka, Tobias, Cui, Yan, Schacke, Stephan, Merkel, Ulrike, Markwart, Robby, Rubio, Ignacio, Than, Manuel E., Breithaupt, Constanze, Peuker, Sebastian, Seifert, Reinhard, Kaupp, Ulrich Benjamin, Herrlich, Peter, and Morrison, Helen

Published
2013

25. Partitioning of Water Between Differently Sized Shrubs and Potential Groundwater Recharge in a Semiarid Savanna in Namibia

Author

Geißler, Katja, Heblack, Jessica, Uugulu, Shoopala, Wanke, Heike, and Blaum, Niels

Subjects
Savannas, rain event depth, stable isotopes, Plant Science, lcsh:Plant culture, groundwater recharge, ddc:570, rooting depth, lcsh:SB1-1110, shrub size, Acacia mellifera, Institut für Biochemie und Biologie, bush encroachment, Original Research
Abstract

Introduction: Many semiarid regions around the world are presently experiencing significant changes in both climatic conditions and vegetation. This includes a disturbed coexistence between grasses and bushes also known as bush encroachment, and altered precipitation patterns with larger rain events. Fewer, more intense precipitation events might promote groundwater recharge, but depending on the structure of the vegetation also encourage further woody encroachment. Materials and Methods: In this study, we investigated how patterns and sources of water uptake of Acacia mellifera (blackthorn), an important encroaching woody plant in southern African savannas, are associated with the intensity of rain events and the size of individual shrubs. The study was conducted at a commercial cattle farm in the semiarid Kalahari in Namibia (MAP 250 mm/a). We used soil moisture dynamics in different depths and natural stable isotopes as markers of water sources. Xylem water of fifteen differently sized individuals during eight rain events was extracted using a Scholander pressure bomb. Results and Discussion: Results suggest the main rooting activity zone of A. mellifera in 50 and 75 cm soil depth but a reasonable water uptake from 10 and 25 cm. Any apparent uptake pattern seems to be driven by water availability, not time in the season. Bushes prefer the deeper soil layers after heavier rain events, indicating some evidence for the classical Walter’s two-layer hypothesis. However, rain events up to a threshold of 6 mm/day cause shallower depths of use and suggest several phases of intense competition with perennial grasses. The temporal uptake pattern does not depend on shrub size, suggesting a fast upwards water flow inside. d2H and d18O values in xylem water indicate that larger shrubs rely less on upper and very deep soil water than smaller shrubs. It supports the hypothesis that in environments where soil moisture is highly variable in the upper soil layers, the early investment in a deep tap-root to exploit deeper, more reliable water sources could reduce the probability of mortality during the establishment phase. Nevertheless, independent of size and time in the season, bushes do not compete with potential groundwater recharge. In a savanna encroached by A. mellifera, groundwater will most likely be affected indirectly., Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, 798

Published
2019

26. Interconnected effects of shrubs, invertebrate‐derived macropores and soil texture on water infiltration in a semi‐arid savanna rangeland

Author

Marquart, Arnim, Eldridge, David J., Geissler, Katja, Lobas, Christoph, Blaum, Niels, Marquart, Arnim, Eldridge, David J., Geissler, Katja, Lobas, Christoph, and Blaum, Niels

Abstract

Many semi arid savannas are prone to degradation, caused for example, by overgrazing or extreme climatic events, which often lead to shrub encroachment. Overgrazing by livestock affects vegetation and infiltration processes by directly altering plant composition (selective grazing) or by impacting soil physical properties (trampling). Water infiltration is controlled by several parameters, such as macropores (created by soil‐burrowing animals or plant roots) and soil texture, but their effects have mostly been studied in isolation. Here we report on a study, in which we conducted infiltration experiments to analyze the interconnected effects of invertebrate‐created macropores, shrubs and soil texture (sandy soil and loamy sand) on infiltration in two Namibian rangelands. Using structural equation modeling, we found a direct positive effect of shrub size on infiltration and indirectly via invertebrate macropores on both soil types. On loamy sands this effect was even stronger, but additionally, invertebrate‐created macropores became relevant as a direct driver of infiltration. Our results provide new insights into the effects of vegetation and invertebrates on infiltration under different soil textures. Pastoralists should use management strategies that maintain a heterogeneous plant community that supports soil fauna to sustain healthy soil water dynamics, particularly on soils with higher loam content. Understanding the fundamental functioning of soil water dynamics in drylands is critical because these ecosystems are water‐limited and support the livelihoods of many cultures worldwide

Published
2020

27. Shrub encroachment is not always land degradation

Author

Hering, Robert, Hauptfleisch, Morgan, Geissler, Katja, Marquart, Arnim (Dr.), Schoenen, Maria, and Blaum, Niels

Subjects
ddc:570, Institut für Biochemie und Biologie
Abstract

Shrub encroachment in semi-arid savannas is induced by interacting effects of climate, fire suppression, and unsustainable livestock farming; it carries a severe risk of land degradation and strongly influences natural communities that provide key ecosystem functions. However, species-specific effects of shrub cover on many animal groups that act as indicators of degradation remain largely unknown. We analysed the consequences of shrub encroachment for ground-dwelling beetles in a semi-arid Namibian savanna rangeland, where beetles and vegetation were recorded along a shrub cover gradient (30%). Focusing on species niche breadths and optima, we identified two crucial shrub cover thresholds (2.9% and 10.0%), corresponding to major changes in the beetle communities with implications for savanna ecosystem functioning. Niche optima of most species were between the first and second thresholds; beyond the second threshold, saprophagous, coprophagous, and rare predatory beetles declined in numbers and diversity. This is problematic because beetles provide important ecosystem functions, such as decomposition and nutrient cycling. However, we also found that certain species were adapted to high shrub cover, thus providing examples of niche differentiation. Despite the predominantly negative effects of heavy shrub encroachment on beetle communities, shrubs in their early life stages apparently provide essential structures, which enhance habitat quality for ground-dwelling beetles. Our results demonstrate that shrub encroachment can have mixed effects on ground-dwelling beetle communities and hence on savanna ecosystem functioning. We, therefore, conclude that rangeland management and restoration should consider the complex trade-offs between species-specific effects and the level of encroachment for sustainable land use.

Published
2018

35. Experimental evidence for root competition effects on community evenness in one of two phytometer species.

Author

Weiss, Lina, Schalow, Linda, Jeltsch, Florian, and Geissler, Katja

Subjects
PLANT communities, COMPETITION (Biology), SPECIES, COMMUNITY organization, CONTESTS, COMMUNITIES
Abstract

Aims Plant–plant interactions, being positive or negative, are recognized to be key factors in structuring plant communities. However, it is thought that root competition may be less important than shoot competition due to greater size symmetry belowground. Because direct experimental tests on the importance of root competition are scarce, we aim at elucidating whether root competition may have direct or indirect effects on community structure. Indirect effects may occur by altering the overall size asymmetry of competition through root–shoot competitive interactions. Methods We used a phytometer approach to examine the effects of root, shoot and total competition intensity and importance on evenness of experimental plant communities. Thereby two different phytometer species, Festuca brevipila and Dianthus carthusianorum, were grown in small communities of six grassland species over three levels of light and water availability, interacting with neighbouring shoots, roots, both or not at all. Important Findings We found variation in community evenness to be best explained if root and shoot (but not total) competition were considered. However, the effects were species specific: in Dianthus communities increasing root competition increased plant community evenness, while in Festuca communities shoot competition was the driving force of this evenness response. Competition intensities were influenced by environmental conditions in Dianthus, but not in Festuca phytometer plants. While we found no evidence for root–shoot interactions for neither phytometer species root competition in Dianthus communities led to increased allocation to shoots, thereby increasing the potential ability to perform in size-asymmetric competition for light. Our experiment demonstrates the potential role of root competition in structuring plant communities. [ABSTRACT FROM AUTHOR]

Published
2019
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37. Scales, key aspects, feedbacks and challenges of ecohydrological research in Germany

Author

Müller, Eva Nora, van Schaik, Loes, Blume, Theresa, Bronstert, Axel (Prof. Dr.), Carus, Jana, Fleckenstein, Jan H., Fohrer, Nicola, Geissler, Katja, Gerke, Horst H., Gräff, Thomas, Hesse, Cornelia, Hildebrandt, Anke, Hölker, Franz, Hunke, Philip, Körner, Katrin, Lewandowski, Jörg, Lohmann, Dirk, Meinikmann, Karin, Schibalski, Anett, Schmalz, Britta, Schröder-Esselbach, Boris, and Tietjen, Britta

Subjects
Institut für Geowissenschaften
Abstract

Ecohydrology analyses the interactions of biotic and abiotic aspects of our ecosystems and landscapes. It is a highly diverse discipline in terms of its thematic and methodical research foci. This article gives an overview of current German ecohydrological research approaches within plant-animal-soil-systems, meso-scale catchments and their river networks, lake systems, coastal areas and tidal rivers. It discusses their relevant spatial and temporal process scales and different types of interactions and feedback dynamics between hydrological and biotic processes and patterns. The following topics are considered key challenges: innovative analysis of the interdisciplinary scale continuum, development of dynamically coupled model systems, integrated monitoring of coupled processes at the interface and transition from basic to applied ecohydrological science to develop sustainable water and land resource management strategies under regional and global change.

Published
2014

38. Short‐term responses of darkling beetles (Coleoptera:Tenebrionidae) to the effects of fire and grazing in savannah rangeland.

Author

Reinhard, Johanna E., Geissler, Katja, Blaum, Niels, Didham, Raphael, and Barton, Philip

Subjects
*SAVANNAS, *BIODIVERSITY, *GRAZING, *BIOMASS, *BEETLES
Abstract

Fire and grazing shape biodiversity in savannah landscapes. In land use management, knowing the effects of fire and grazing on biodiversity are important in order to ensure environmental sustainability. Beetles specifically are indicators of the biodiversity response to fire and grazing.A grazing exclusion and burning experiment in a split‐plot design was used in order to investigate the interacting effects of fire and wildlife grazing on biomass, diversity, and species composition of darkling beetles (Coleoptera, Tenebrionidae) over time after fire.Darkling beetle species richness and diversity were responding in a three‐way‐interaction to fire, grazing, and time after fire, whereby biomass of darkling beetles remained unaffected and species compositional changes were attributed to seasonal changes of time only. Fire on ungrazed plots had a negative effect on species diversity and richness 2 weeks and 6 months post fire, whereas fire on grazed plots had no impact on species diversity and richness. Grazing only lowered species diversity and richness 6 months after fire treatments.Results suggest that grazing overrides the effects of fire and that the similar effects caused by fire and grazing are due to niche and assemblage simplification of the habitat. [ABSTRACT FROM AUTHOR]

Published
2019
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39. Shrub encroachment is not always land degradation: Insights from ground‐dwelling beetle species niches along a shrub cover gradient in a semi‐arid Namibian savanna.

Author

Hering, Robert, Hauptfleisch, Morgan, Geißler, Katja, Marquart, Arnim, Schoenen, Maria, and Blaum, Niels

Subjects
BIODIVERSITY, FOREST management, GRASSLANDS, PLANT species, BIOTIC communities
Abstract

Shrub encroachment in semi‐arid savannas is induced by interacting effects of climate, fire suppression, and unsustainable livestock farming; it carries a severe risk of land degradation and strongly influences natural communities that provide key ecosystem functions. However, species‐specific effects of shrub cover on many animal groups that act as indicators of degradation remain largely unknown. We analysed the consequences of shrub encroachment for ground‐dwelling beetles in a semi‐arid Namibian savanna rangeland, where beetles and vegetation were recorded along a shrub cover gradient (<1% to >30%). Focusing on species niche breadths and optima, we identified two crucial shrub cover thresholds (2.9% and 10.0%), corresponding to major changes in the beetle communities with implications for savanna ecosystem functioning. Niche optima of most species were between the first and second thresholds; beyond the second threshold, saprophagous, coprophagous, and rare predatory beetles declined in numbers and diversity. This is problematic because beetles provide important ecosystem functions, such as decomposition and nutrient cycling. However, we also found that certain species were adapted to high shrub cover, thus providing examples of niche differentiation. Despite the predominantly negative effects of heavy shrub encroachment on beetle communities, shrubs in their early life stages apparently provide essential structures, which enhance habitat quality for ground‐dwelling beetles. Our results demonstrate that shrub encroachment can have mixed effects on ground‐dwelling beetle communities and hence on savanna ecosystem functioning. We, therefore, conclude that rangeland management and restoration should consider the complex trade‐offs between species‐specific effects and the level of encroachment for sustainable land use. [ABSTRACT FROM AUTHOR]

Published
2019
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41. Life strategies of rare river corridor plants : autecological investigation of Cnidium dubium, Gratiola officinalis and Juncus atratus with special consideration of their stress resistance

Author

Geißler, Katja

Subjects
ddc:570, Institut für Biochemie und Biologie
Abstract

Die vorliegende Dissertation behandelt die Ökologie von Cnidium dubium (Schkuhr) Thell. (Sumpf-Brenndolde), Gratiola officinalis L. (Gottes-Gnadenkraut) und Juncus atratus Krocker (Schwarze Binse), drei gefährdeten Arten, die als sogenannte Stromtalpflanzen in Mitteleuropa in ihrem Vorkommen eng an die Flussauen gebunden sind. Die Arbeit basiert auf verschiedenen Simulationsexperimenten und Feldstudien in der Unteren Havelniederung, einem „Feuchtgebiet von internationaler Bedeutung“. Sie behandelt Themenkomplexe wie das Samenbankverhalten, die Samenkeimung, die Stickstofflimitierung, die Konkurrenzkraft, das Verhalten der Pflanzen nach einer Sommertrockenheit und nach einer Winter/Frühjahrsüberflutung. Ferner widmet sie sich der Populationsbiologie der Arten und dem Verhalten der Pflanzen nach besonderen Störungsereignissen wie Mahd, Herbivorie und der Sommerflut 2002. Der Leser erfährt, wie die Pflanzen in verschiedenen Lebensphasen auf die auentypische Umwelt reagieren und erhält umfassende Einblicke in physiologische Mechanismen, die der Anpassung an die typischen Bedingungen einer mitteleuropäischen Flussaue dienen. Eine Interpretation der Ergebnisse zeigt auf, welche der spezifischen Eigenschaften zur Gefährdung der drei Stromtalarten beitragen. Die Arbeit ist für den Arten-, Biotop- und Landschaftsschutz interessant. Darüber hinaus bietet sie zahlreiche Anknüpfungspunkte zur ökophysiologischen Grundlagenforschung. Die verstärkte Nutzung physiologischer Methoden bei der Klärung ökologischer Fragestellungen wird angeregt. The thesis deals with the ecology of three endangered European river corridor angiosperms Cnidium dubium (Schkuhr) Thell., Gratiola officinalis L. und Juncus atratus Krocker. The study is based on different experimental approaches and field surveys in a wetland along the Lower Havel River, a designated German Ramsar-site (Wetland of International Importance). This involves the examination of aspects of seed bank dynamics, germination, nitrogen limitation, competitive ability, and the response of plants to summer drought and/or winter/spring flooding. The thesis continues with a detailed study of the population biology of the species at natural sites and the response of these plants to specific disturbances like mowing, herbivory and the severe summer flooding in 2002. The reader learns about the traits of the three plant species to tolerate the typical conditions their natural sites are exposed to in different phases of their life cycle. He gets a comprehensive look at physiological means by which plants can adapt to the prevailing conditions of European river lowlands. The interpretation of the results is used to reveal specific plant traits, which may contribute to the endangerment of the three river corridor plants. As such, this thesis is interesting for protection of species, biotopes and landscapes. Furthermore, it provides numerous close connections to fundamental research from an ecophysiological perspective. The increased use of physiological methods is recommended in order to be able to adequately resolve ecological problems.

Published
2008

50. DIGITALISIERUNG IM ARCHIV.

Author

Baibl, Lorenz, Beyer, Katrin, Fischer, Ole, Geißler, Katja, Grüber, Michelle, Kreie, Oliver, and Petter, Dirk

Abstract

The article presents a report on a conference on the digitization of archival materials, held at the Archivschule (School of Archival Studies) in Marburg, Germany, from November 26-27, 2013. Topics of discussion included the presentation of digitized archival materials on the Internet, the selection of archival materials for digitization and preservation, and the debate whether archival processing and the creation of online finding aids should take precedence over mass digitization.

Published
2014

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