Soil is a heterogeneous and structured environment that is characterised by variable geometry, composition and stability, across spatial scales spanning several orders of magnitude. The physical structure of solid and pore space results in a complex distribution of oxygen, water films and gradients of solutes spanning distances as small as a few micrometers, all of which have a profound effect on the ecological and hydrological functioning of soil.
The soil structure is determined by an interplay of physical, chemical and biological mechanisms, the quantitative role of which is still poorly understood. Soil structure is difficult to study as it is a 3D opaque matrix. To shed light into soil structure, the concept of aggregate has often been used and defines “pieces” of soil structure, that remain bounded under disrupting forces. Microaggregates (250µm) are larger soil units, composed by microaggregates and primary particles, bound together by biological agents, such as roots, fungal hyphae or even earthworm activity. Cutting edge imaging techniques are as well used to observe “in situ” associations of mineral and organic material at micro- and macro-scales and the resulting ever changing pore space, which is partly destroyed when focusing on aggregates, even though it has a fundamental role in soil ecology and functioning.

In this session we integrate the description of structure and its dynamics, using new imaging techniques, with the ecological, functional and physical consequences of the spatial arrangement of soil constituents. A strong interdisciplinary approach is thus required, merging soil physicists, chemists and ecologists. The ultimate aim is to understand how soil structure, from micro-architecture to macropores, emerges from interactions within soil and how it determines the outcome of soil processes, in order to create models of soil functioning that integrate structure dynamics.
This session is divided into two oral blocks, one focusing more on the micro-scale in relation to microbial activities and the other accounting for micro- and macro-scale in relation to soil ecology of larger organisms and soil functioning. Carsten Mueller is the solicited speaker of the first oral block and Matthias Rillig is solicited for the second oral block.

Co-organized as HS8.3.10
Convener: Ulrich Weller | Co-conveners: Amandine Erktan, Naoise Nunan, Claire Chenu, Kai Uwe Totsche
| Wed, 10 Apr, 14:00–18:00
Room G1
| Attendance Thu, 11 Apr, 08:30–10:15
Hall X1

Attendance time: Thursday, 11 April 2019, 08:30–10:15 | Hall X1

Chairperson: Claire Chenu, Ulrich Weller
X1.223 |
Katharina Meurer, Elsa Coucheney, Anke Herrmann, Thomas Keller, and Nicholas Jarvis
Hall X1
X1.224 |
Michaela Aehnelt and Kai U. Totsche
Hall X1
X1.225 |
Steffen Schlüter, Thilo Eickhorst, and Carsten Müller
Hall X1
X1.226 |
Vincent Felde, Daniel Uteau, and Stephan Peth
Hall X1
X1.227 |
Daniel Uteau Puschmann, Vincent J.M.N.L. Felde, Steffen A. Schweizer, Danh Biesgen, Angela Ulbrich, Claudia Knief, Markus Graf-Rosenfellner, and Ingrid Kögel-Knabner
Hall X1
X1.228 |
| Highlight
Reza Hosseinpour Ashenaabad, Mats Larsbo, Daniel Iseskog, Nicholas Jarvis, Paul Hallett, Annette Dathe, and Thomas Keller
Hall X1
X1.229 |
P. Micaela Mafla Endara, Kristin Aleklett, Pelle Ohlsson, and Edith Hammer
Hall X1
X1.230 |
Alexandre Coche, Tristan Babey, Jean-Raynald De Dreuzy, Alain Rapaport, Laure Vieublé-Gonod, and Patricia Garnier
Hall X1
Hall X1
X1.232 |
Iuliia Golovleva, Elena Korkina, Roman Desyatkin, Ary Bruand, Marina Verba, and Pavel Krasilnikov
Hall X1
X1.233 |
Claudia Knief, Danh Biesgen, Lars Krause, Aaron Treder, Steffen Schweizer, Erwin Klumpp, and Nina Siebers
Hall X1
X1.234 |
Daniel Iseskog, Norbert Kirchgessner, Susanne Alexandersson, Thomas Keller, and Tino Colombi
Hall X1
X1.235 |
Anna Yudina and Konstantin Romanenko
Hall X1
X1.236 |
Do diversity of plants, soil fungi and bacteria influence aggregate stability on Ferralsols? A metagenomic approach in a tropical hotspot of biodiversity
(withdrawn after no-show)
Julien Demenois, Luis Merino-Martín, Nicolas Fernandez Nunez, Alexia Stokes, and Fabian Carriconde
Hall X1
X1.237 |
Franziska Bucka, Angelika Kölbl, Daniel Uteau Puschmann, Stephan Peth, and Ingrid Kögel-Knabner
Hall X1
X1.238 |
Carson Dann, Miguel Cabrera, and Francesco Morari
Hall X1
X1.239 |
Panos Panagos and Alberto Orgiazzi
Hall X1
X1.240 |
Edouard Quibel, Yoann Copard, Claudine Richter, François Elie, Lauric Cecillon, Catherine Collet, Michaël Aubert, and Fabrice Bureau
Hall X1
X1.241 |
Charlotte Vedere, Laure Vieublé, Valerie Pouteau, Cyril Girardin, and Claire Chenu