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1. Aggregate stability and carbon and N dymamics in macroaggregate size fractions with different soil texture.

Author

Sbih, Mahtali, Bounouara, Zohra, Bensid, Zoubeir, Chergui, Djenette, Zerari, Abbes, Meziane, Souhila, and Karam, Antoine

Subjects
*SOIL texture, *SOIL structure, *CLAY soils, *PARTICLE size distribution, *CARBON emissions
Abstract

Soil nutrient cycling, the distribution of soil aggregates, and their stability are directly influenced by soil texture. Different sizes of soil aggregates provide microhabitats for microorganisms and therefore influence soil carbon (C) and nitrogen (N) mineralization. The purpose of the present study was to assess the aggregate stability and dynamics of carbon and nitrogen in macroaggregate size fractions (1-8 mm) with different clay content from meadow soils. Surface soil samples (0-15 cm) were collected from 4- to 5-year-old forage crops. Four macroaggregate size classes were isolated by dry sieving and analyzed for their mass proportions: fine macroaggregates (FM) (less than 1 mm), medium-fine macroaggregates (MFM) (1-2 mm), mediumcoarse macroaggregates (MCM) (2-4 mm), and large-coarse macroaggregates (LCM) (4-8 mm). The dry mean weight diameter (MWD), organic carbon (OC), total nitrogen (TN), carbon and nitrogen of microbial biomass (C-MB, N-MB) were determined. CO2 emission and net nitrogen mineralized (NM) were measured after 14 weeks of incubation. The amounts of FM were significantly lower than those of intermediate macroaggregates (MCM and MFM) and decreased markedly with increasing clay content within soil macroaggregates. In general, the amounts of macroaggregate size fractions were lowest in soils with high clay content. MWD exhibited a significant correlation with particle size distribution, OC, and MB-C. OC, TN, MB-C, and MB-N contents within macroaggregates increased with decreasing macroaggregate size and increasing clay content of macroaggregate fractions. The CO2 emission and NM content increased with increasing macroaggregate size, indicating higher organic C and N mineralization activity in larger macroaggregates. Mineralization of OC was lowest in macroaggregate fractions with the highest clay content. We conclude that clay content can increase the protection of microbial biomass in meadow soils. Small macroaggregates tend to contain more recalcitrant organic matter compared to larger macroaggregates. [ABSTRACT FROM AUTHOR]

Published
2024
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5. The Mediterranean region under climate change

Author

A. Osman, Mona, Aboul-Naga, Adel, Adallal, Rachid, Aderghal, Mohamed, Afif, Charbel, Alary, Véronique, Alifriqui, Mohamed, Alkama, Rezak, Alleaume, Samuel, Alpert, Pinhas, Ancona, Carla, Annabi, Mohamed, Annesi-Maesano, Isabella, Anquetin, Sandrine, Ardilouze, Constantin, Auclair, Laurent, Aumeeruddy-Thomas, Yildiz, Azuara, Julien, B. Nicolas, José, Badri, Wadi, Bailly, Alicia, Baldy, Virginie, Bard, Edouard, Barouki, Robert, Barre, Philippe, Bassetti, Maria-Angela, Batté, Lauriane, Baudoin, Ezekiel, Beekmann, Matthias, Belhimer, Ammar, Benaïssa, Fatima, Benedetti, Fabio, Benjelloun, Badr, Benkaddour, Abdel, Ben Rais Lasram, Frida, Bergametti, Gilles, Berger, Jean-François, Bernoux, Martial, Beveren, Elisabeth Van, Bissonnais, Yves Le, Blanchet, Juliette, Blanfuné, Aurélie, Boissard, Christophe, Bonnet, Pascal, Boone, Aaron, Borbon, Agnès, Borga, Marco, Boudevillain, Brice, Bouet, Christel, Boulet, Gilles, Bounouara, Zohra, Bou Dagher, Magda, Brahim, Nadhem, Bras, Jean-Philippe, Braud, Isabelle, Briche, Elodie, Brousseau, Pierre, Cardinael, Rémi, Carozza, Jean-Michel, Carozza, Laurent, Cavicchia, Leone, Chapron, Emmanuel, Charef, Mohamed, Charki, Abderafi, Chenu, Claire, Chevallier, Tiphaine, Chiraz, Belhadj Kheder, Chotte, Jean-Luc, Colette, Augustin, Coll, Marta, Combourieu-Nebout, Nathalie, Coppola, Erika, Costes, Evelyne, Cournac, Laurent, Courp, Thierry, Cozannet, Gonéri Le, Cramer, Wolfgang, Creutin, Jean-Dominique, Dahech, Salem, Dakhlaoui, Hamouda, Daoud, Ibrahim, Darmaraki, Sofia, Darras, Sabine, Dayan, Uri, Débevec, Cécile, Delon, Claire, Delrieu, Guy, Déqué, Michel, Derridj, Arezki, Desboeufs, Karine, Dezileau, Laurent, Diakakis, Michalis, Di Sarra, Alcide, Dollé, Vincent, Doraï, Kamel, Dounias, Edmond, Douvinet, Johnny, Driouech, Fatima, Drobinski, Philippe, Ducrocq, Véronique, Dulac, François, Duponnois, Robin, Dupret, Baudouin, Durand, Pierre, Dusanter, Sébastien, D’Anna, Barbara, Elyazami, Driss, El Mehdi Saidi, Mohamed, Fady, Bruno, Fakir, Younes, Farah, Wehbeh, Fehri, Noômène, Fernandez, Catherine, Fischer, Claude, Flaounas, Emmanouil, Forastiere, Francesco, Formenti, Paola, Forslund, Agneta, Fourrié, Nadia, François Boudouresque, Charles, Galiana, Antoine, Gallali, Tahar, Garcia, Marta, Gaume, Eric, Gauquelin, Thierry, Geniez, Philippe, Genin, Didier, Genty, Dominique, Ghilardi, Matthieu, Gourley, Jonathan, Gros, Valérie, Gualdi, Silvio, Guégan, Jean-François, Guilhaumon, François, Guiot, Joël, Hachicha, Mohamed, Haddouch, Hassan, Hafidi, Mohamed, Haité, Hakima El, Halouani, Ghassen, Hamdi, Salwa, Hamdi-Aissa, Baelhadj, Hamonou, Eric, Hanich, Lahoucine, Harzallah, Ali, Hattab, Tarek, Hebert, Bertil, Himbert, Marc, Hmimsa, Younes, Hochman, Assaf, Hugot, Laetitia, Jalali, Bassem, Jambert, Corinne, Jarlan, Lionel, Javelle, Pierre, Joffre, Richard, Jorda, Gabriel, Jouve, Guillaume, Kallel, Nejib, Kallida, Rajae, Kathra, Nabil Ben, Khabba, Saïd, Khadari, Bouchaib, Khatteli, Houcine, Kotroni, Vassilki, Kuzucuoglu, Catherine, Labiadh, Mohamed, Lacroix, Denis, Lang, Michel, Lasram, Frida Ben Rais, Lasseur, Jacques, Lathière, Juliette, Laurent, Benoît, Leduc, Christian, Legave, Jean-Michel, Leriche, Maud, Lespez, Laurent, Le Loc’H, François, Li, Laurent, Lili-Chabaane, Zohra, Limousin, Jean-Marc, Lionello, Piero, Liousse, Catherine, Llasat, Maria Carmen, Locoge, Nadine, Loc’H, François Le, Loireau, Maud, Longepierre, Damien, Lutoff, Céline, Mailler, Sylvain, Malinowski, Dariusz, Mallet, Marc, Manceron, Stéphane, Maouche, Said, Marchi, Lorenzo, Marcos, Marta, Martin, Eric, Martin, Luc, Martin, Nicolas, Marty, Pascal, Marty, Pauline, Massuel, Sylvain, Médail, Frédéric, Mekki, Insaf, Mellas, Samira, Menad, Wahiba, Menut, Laurent, Michon, Geneviève, Michoud, Vincent, Mihalopoulos, Nikolaos, Moatti, Jean-Paul, Mohamed Zaghloul, Alaa, Molénat, Jérôme, Molinié, Gilles, Monier, Marie, Montagna, Paulo, Montoroi, Jean-Pierre, Morillon, Raphaël, Mouaqit, Mohamed, Mouël, Chantal Le, Mouillot, Florent, Moukhli, Abdelmajid, Moullec, Fabien, Mrad Nakhlé, Myriam, Munoz, François, Nabat, Pierre, Nasrallah, Wafa, Neppel, Luc, Norton, Mark, Ouahmane, Lahcen, Ouelhazi, Bahri, Öztürk, Fatma, Page, Michel Le, Payrastre, Olivier, Planton, Serge, Podwojewski, Pascal, Pradel, Roger, Prévot, Laurent, Prin, Yves, Pulido Bosch, Antonio, Quintana-Seguí, Pere, Raclot, Damien, Raimbault, Patrick, Rajot, Jean-Louis, Ramadan Ali, Rafat, Rambal, Serge, Regnard, Jean-Luc, Remini, Boualem, Renard, Jean-Baptiste, Rhaz, Khalid EL, Rhoujjati, Ali, Ricaud, Philippe, Richard, Franck, Ruelland, Denis, Ruin, Isabelle, Sabir, Mohamed, Saint-Martin, Clotilde, Salah, Ehab, Salameh, Thérèse, Sánchez, Enrique, Sanguin, Hervé, Saraux, Claire, Sartelet, Karine, Satta, Alessio, Sauvage, Stéphane, Schatz, Bertrand, Schmitt, Bertrand, Sciare, Jean, Scolobig, Anna, Sellegri, Karine, Shin, Yunne-Jai, Sicard, Michaël, Sicre, Marie-Alexandrine, Silva, Anne Da, Simenel, Romain, Simmoneau, Anaëlle, Slimani, Said, Snoussi, Maria, Solmon, Fabien, Somot, Samuel, Sonzogni, Corinne, Soussana, Jean-François, Stafoggia, Massimo, Sylvestre, Florence, Szczypta, Camille, Tachikawa, Kazuyo, Taschen, Elisa, Thibaut, Thierry, Thibon, Maxime, Thiébault, Stéphanie, Torquebiau, Emmanuel, Tramblay, Yves, Valentin, Christian, Vallet-Coulomb, Christine, Vanniere, Boris, Vennetier, Michel, Verlaque, Marc, Vicente-Serrano, Sergio, Vidal, Jean-Philippe, Vidal, Laurence, Vinet, Freddy, Viry, Elisabeth, Vogt-Schilb, Hélène, Volaire, Florence, Voltz, Marc, Waked, Antoine, Wattrelot, Eric, Yazami, Driss El, Zaher, Hayat, Zappa, Massimiliano, Zbinden, Régina, Zitouna-Chebbi, Rim, Zribi, Mehrez, Moatti, Jean-Paul, and Thiébault, Stéphane

Subjects
Méditerranée, Allenvi, changement climatique, climatic change, RNK, Environmental Studies, COP22, Mediterranean, NAT011000
Abstract

This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.

Published
2018

6. Sub-chapter 3.5.3. Soil carbon as an indicator of Mediterranean soil quality

Author

Chevallier, Tiphaine, Hamdi, Salwa, Gallali, Tahar, Brahim, Nadhem, Cardinael, Rémi, Bounouara, Zohra, Cournac, Laurent, Chenu, Claire, and Bernoux, Martial

Abstract

Two forms of carbon in Mediterranean soils Soils are considered as one of the largest C pools on Earth, after the oceanic and geologic reservoirs. The soil C pool comprises two distinct components: soil organic carbon (SOC) and soil inorganic carbon (SIC), which roughly contribute 2/3 and 1/3, respectively (Batjes, 1996). Soil organic carbon (SOC) represents about 50% of soil organic matter, by consequence “soil organic matter” and “soil organic carbon” are often confused and used interchange...

Published
2018

7. Soil carbon as an indicator of Mediterranean soil quality

Author

Chevallier, Tiphaine, Hamdi, Salwa, Gallali, Tahar, Brahim, Nadhem, CARDINAEL, Rémi, Bounouara, Zohra, Cournac, Laurent, Chenu, Claire, Bernoux, Martial, Institut de Recherche pour le Développement (IRD [France-Ouest]), Chercheur indépendant, Faculté des Sciences de Tunis, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Université 20 Août 1955 Skikda, Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Thiébault, S. (ed.), Moatti, Jean-Paul (ed.), Faculté des Sciences Mathématiques, Physiques et Naturelles de Tunis (FST), and Université de Tunis El Manar (UTM)

Subjects
P33 - Chimie et physique du sol, P40 - Météorologie et climatologie, [SDV]Life Sciences [q-bio], Conservation des sols, FACTEUR ANTHROPIQUE, Matière organique du sol, INDICATEUR, Fertilité du sol, Propriété physicochimique du sol, Changement climatique, SOL, FERTILITE DU SOL, P35 - Fertilité du sol, STOCK, ATMOSPHERE, Zone méditerranéenne, CARBONE, CARBONE ORGANIQUE, PRATIQUE CULTURALE, séquestration du carbone, SYSTEME AGRAIRE, réduction des émissions, SERVICE ECOSYSTEMIQUE, QUALITE DU SOL, Cycle du carbone
Abstract

This book, coordinated by AllEnvi, is published on the occasion of the 22nd Conference of the Parties to the United Nations Framework Convention on Climate Change (COP22, Marrakech, 2016); Soil carbon as an indicator of Mediterranean soil quality

Published
2016

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