9 Critical unknowns in the cycling of P in forest, grassland and wetland ecosystems


Mark Bakker (FR),
Else Bünemann (CH)

Dienstag, 12:10 - Donnerstag, 10:40, H20

Our understanding of P cycling in ecosystems is still limited, mainly due to methodological problems. In this session, we would like to identify critical knowledge gaps in P cycling processes, such as the role of microbial P turnover and soil organic P in plant P uptake, the role of soil structure and the contribution of roots to soil organic P stabilization, forms and quantities of P losses from ecosystems, and others. We welcome presentations on new approaches and analytical techniques to quantify pools and fluxes (isotopes, molecular tools, modelling, element stoichiometry, spectroscopic tools etc.). The session aims to span all levels from the molecular to the ecosystem scale, and to provide recommendations on how to define best possible management practices with minimal inputs and losses of P.



Session key note speaker:

Reiner Giesler (SE) Time to re-define available P; hints from molecular approaches and landscape patterns in boreal forests

08:00 Bus shuttle hotels
09:00 Excursions Key Note 5: Benjamin Turner (H15, NWI)The ecological significance of soil phosphorus in lowland tropical rain forests
10:00 O 9.4: Nina Hacker et al.: Plant species richness effects on P cycling: a comparison between experimental and established grasslands.
10:20 O 9.5: Florian Werner et al.: Distribution of phosphorus concentration in two German forest soils from the nanometer- to the profile scale
10:40 Coffee Break
12:10Invited Talk 9: Reiner Giesler: Time to re-define available P; hints from molecular approaches and landscape patterns in boreal forests
12:40Lunch (Mensa)
14:15Key Note 4: Luca Bragazza (H15, NWI)Biogeochemical impacts of climate warming and atmospheric nitrogen deposition in peatlands: An aboveground-belowground perspective
15:00Coffee Break
15:30O 9.1: Nina Gottselig et al.: Fine colloidal and nanoparticulate P, Fe, Al and C distribution in stream water of a German mountainous forest catchment
15:50O 9.2: Claude Plassard et al.: Do trophic relationships in soil enhance organic P cycling and plant P nutrition? Phytate mineralization as a case study
16:10O 9.3: Corina Buendía et al.: Can phosphorus redistribution by animals fertilise Amazonian lowlands?
16:30Poster Session 2: Sessions 2, 3, 9, 10, 11, 12
18:00Buses depart to hotels (18:15)
20:00Conference Dinner (Herzogkeller)

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P 9.1 Mark Bakker, David Achat, Laurent Augusto, Anne Gallet-Budynek, Christian Morel
Biogeochemistry of P in the southwest of France – case studies from Pinus pinaster forests on sandy soils
P 9.2 Peggy Bierbaß, Martin Kohler, Jürgen Bauhus
Variation of P concentrations in growth rings of Norway spruce (Picea abies) as indicators of P availability in forest ecosystems
P 9.3 Petr Capek, Petr Kotas, Stefano Manzoni, Hana Santruckova
What is the threshold carbon to phosphorus resource ratio of soil microbial community demand?
P 9.4 Anna Frymark-Szymkowiak, Barbara Kieliszewska-Rokicka
Activity of soil phosphatases in the rhizosphere of Populus alba L. in riparian forests
P 9.5 Christine Heuck, Marie Spohn
Microbial nutrient limitation, C:N:P stoichiometry and organic phosphorus mineralization in temperate forest soils
P 9.6 Xiaoqian Jiang, Roland Bol, Sabine Willbold, Wulf Amelung, Erwin Klumpp
Speciation and quantification of P and Fe (Al) (hydr)oxide associates in particle size fractions of an arable soil
P 9.7 Dorit Julich, Jianhong Liang, Karl-Heinz Feger
P transport and accumulation along preferential flow pathways in forest soils
P 9.8 Nina Koele
New approaches to study soil P
P 9.9 Friederike Lang, Jürgen Bauhus, Emmanuel Frossard, Klaus Kaiser, Jaane Krüger, Andrea Polle, Jörg Prietzel, Heinz Rennenberg
Ecosystem Nutrition: Forest Strategies for limited Phosphorus Resources An introduction to the DFG/SNF Priority Programme 1685
P 9.10 Anna Missong, Nischwitz Volker, Willbold Sabine, Bol Roland, Klumpp Erwin
On the role of colloids and nanoparticles for the distribution of phosphorus in a forest topsoil
P 9.11 Jörg Niederberger, Martin Kohler, Jürgen Bauhus
Plant availability of Phosphorus in forest soils - is not soluble not available?
P 9.12 Petr Porcal
Phosphorus sorption on photochemically induced particles
P 9.13 Irantzu Primicia, J. Bosco Imbert, Maitane Unzu, Susana García, F. Javier Arricibita, M Carmen Traver, Federico J. Castillo
Below-aboveground phosphorus dynamics in a pine-beech Mediterranean forest
P 9.14 Marie Spohn, Tibor Novák, Incze Jozsef, Luise Giani
Dynamics of soil phosphorus fractions after land-use abandonment in relation to carbon and nitrogen
P 9.15 Ulrike Talkner
Organically bound and microbial phosphorus in the topsoil of 20 European beech (Fagus sylvativa L.) stands in Germany and its potential role in forest phosphorus nutrition
P 9.16 Lin Yu, Salim Belyazid
PhosFors – a dynamic numerical model of the phosphorus cycle in forest ecosystems

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