TY  - JOUR
A1  - Eilmann, Britta
A1  - Buchmann, Nina
A1  - Siegwolf, Rolf
A1  - Saurer, Matthias
A1  - Cherubini, Paolo
A1  - Rigling, Andreas
T1  - Fast response of Scots pine to improved water availability reflected in tree-ring width and δ13C
JF  - Plant, Cell and Environment
N2  - Drought-induced forest decline, like the Scots pine mortality in inner-Alpine valleys, will gain in importance as the frequency and severity of drought events are expected to increase. To understand how chronic drought affects tree growth and tree-ring δ13C values, we studied mature Scots pine in an irrigation experiment in an inner-Alpine valley. Tree growth and isotope analyses were carried out at the annual and seasonal scale. At the seasonal scale, maximum δ13C values were measured after the hottest and driest period of the year, and were associated with decreasing growth rates. Inter-annual δ13C values in early- and latewood showed a strong correlation with annual climatic conditions and an immediate decrease as a response to irrigation. This indicates a tight coupling between wood formation and the freshly produced assimilates for trees exposed to chronic drought. This rapid appearance of the isotopic signal is a strong indication for an immediate and direct transfer of newly synthesized assimilates for biomass production. The fast appearance and the distinct isotopic signal suggest a low availability of old stored carbohydrates. If this was a sign for C-storage depletion, an increasing mortality could be expected when stressors increase the need for carbohydrate for defence, repair or regeneration.
Y1  - 2010
U6  - https://doi.org/10.1111/j.1365-3040.2010.02153.x
SN  - 1365-3040 (Online)
SN  - 0140-7791 (Print)
VL  - 33
IS  - 8
SP  - 1351
EP  - 1360
PB  - Wiley-Blackwell
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - de Vries, Sven M. G.
A1  - den Ouden, Jan
A1  - Mohren, Godefridus M. J.
A1  - Sauren, Pascal
A1  - Sass-Klaassen, Ute G. W.
T1  - Origin matters! Difference in drought tolerance and productivity of coastal Douglas-fir (Pseudotsuga menziesii (Mirb.)) provenances
JF  - Forest Ecology and Management
Y1  - 2013
U6  - https://doi.org/doi:10.1016/j.foreco.2013.03.031
SN  - 1872-7042 (Online)
SN  - 0378-1127 (Print)
VL  - 2013
IS  - 302
SP  - 133
EP  - 143
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Dobbertin, Matthias
A1  - Rigling, Andreas
T1  - Growth response of Scots pine with different crown transparency status to drought release
JF  - Annals of Forest Science
Y1  - 2013
U6  - https://doi.org/10.1007/s13595-013-0310-z
SN  - 1286-4560 (Print)
SN  - 1297-966X (Online)
VL  - 70
IS  - 7
SP  - 685
EP  - 693
PB  - Springer
CY  - Cham
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Rigling, Andreas
ED  - Abrams, Marc
T1  - Tree-growth analyses to estimate tree species' drought tolerance
JF  - Tree Physiology
N2  - Climate change is challenging forestry management and practices. Among other things, tree species with the ability to cope with more extreme climate conditions have to be identified. However, while environmental factors may severely limit tree growth or even cause tree death, assessing a tree species' potential for surviving future aggravated environmental conditions is rather demanding. The aim of this study was to find a tree-ring-based method suitable for identifying very drought-tolerant species, particularly potential substitute species for Scots pine (Pinus sylvestris L.) in Valais. In this inner-Alpine valley, Scots pine used to be the dominating species for dry forests, but today it suffers from high drought-induced mortality. We investigate the growth response of two native tree species, Scots pine and European larch (Larix decidua Mill.), and two non-native species, black pine (Pinus nigra Arnold) and Douglas fir (Pseudotsuga menziesii Mirb. var. menziesii), to drought. This involved analysing how the radial increment of these species responded to increasing water shortage (abandonment of irrigation) and to increasingly frequent drought years. Black pine and Douglas fir are able to cope with drought better than Scots pine and larch, as they show relatively high radial growth even after irrigation has been stopped and a plastic growth response to drought years. European larch does not seem to be able to cope with these dry conditions as it lacks the ability to recover from drought years. The analysis of trees' short-term response to extreme climate events seems to be the most promising and suitable method for detecting how tolerant a tree species is towards drought. However, combining all the methods used in this study provides a complete picture of how water shortage could limit species.
Y1  - 2012
U6  - https://doi.org/10.1093/treephys/tps004
SN  - 0829-318X (Print)
SN  - 1758-4469 (Online)
VL  - 32
IS  - 2
SP  - 178
EP  - 187
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Sterck, Frank J.
A1  - Wegner, L.
A1  - de Vries, Sven M. G.
A1  - von Arx, G.
A1  - Mohren, Godefridus M. J.
A1  - den Ouden, Jan
A1  - Sass-Klaassen, Ute G. W.
T1  - Wood structural differences between northern and southern beech provenances growing at a moderate site
JF  - Tree Physiology
Y1  - 2014
U6  - https://doi.org/10.1093/treephys/tpu069
SN  - 1758-4469  (Online)
SN  - 0829-318X (Print)
VL  - 34
IS  - 8
SP  - 882
EP  - 893
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Weber, Pascale
A1  - Rigling, Andreas
A1  - Eckstein, Dieter
T1  - Growth reactions of Pinus sylvestris L. and Quercus pubescens Willd. to drought years at a xeric site in Valais, Switzerland
JF  - Dendrochronologia
Y1  - 2006
U6  - https://doi.org/doi:10.1016/j.dendro.2005.10.002
SN  - 1612-0051 (Online)
SN  - 1125-7865  (Print)
VL  - 23
IS  - 3
SP  - 121
EP  - 132
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Zweifel, Roman
A1  - Buchmann, Nina
A1  - Fonti, Patrick
A1  - Rigling, Andreas
T1  - Drought-induced adaptation of the xylem in Scots pine and pubescent oak
JF  - Tree Physiology
Y1  - 2009
U6  - https://doi.org/10.1093/treephys/tpp035
SN  - 0829-318X (Print)
SN  - 1758-4469 (Online)
VL  - 29
IS  - 8
SP  - 1011
EP  - 1020
PB  - Heron
CY  - Victoria, BC
ER  - 
TY  - JOUR
A1  - Eilmann, Britta
A1  - Zweifel, Roman
A1  - Buchmann, Nina
A1  - Graf Pannatier, Elisabeth
A1  - Rigling, Andreas
T1  - Drought alters timing, quantity, and quality of wood formation in Scots pine
JF  - Journal of Experimental Botany
Y1  - 2011
U6  - https://doi.org/10.1093/jxb/erq443
SN  - 1460-2431 (Online)
SN  - 0022-0957 (Print)
VL  - 62
IS  - 8
SP  - 2763
EP  - 2771
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - El Bergui, Omnia
A1  - Abouabdillah, Aziz
A1  - Bourioug, Mohamed
A1  - Schmitz, Dominik
A1  - Biel, Markus
A1  - Aboudrare, Abdellah
A1  - Krauss, Manuel
A1  - Jomaa, Ahlem
A1  - Romuli, Sebastian
A1  - Müller, Joachim
A1  - Fagroud, Mustapha
A1  - Bouabid, Rachid
T1  - Innovative solutions for drought: Evaluating hydrogel application on onion cultivation (Allium cepa) in Morocco
JF  - Water
N2  - Throughout the last decade, and particularly in 2022, water scarcity has become a critical concern in Morocco and other Mediterranean countries. The lack of rainfall during spring was worsened by a succession of heat waves during the summer. To address this drought, innovative solutions, including the use of new technologies such as hydrogels, will be essential to transform agriculture. This paper presents the findings of a study that evaluated the impact of hydrogel application on onion (Allium cepa) cultivation in Meknes, Morocco. The treatments investigated in this study comprised two different types of hydrogel-based soil additives (Arbovit® polyacrylate and Huminsorb® polyacrylate), applied at two rates (30 and 20 kg/ha), and irrigated at two levels of water supply (100% and 50% of daily crop evapotranspiration; ETc). Two control treatments were included, without hydrogel application and with both water amounts. The experiment was conducted in an open field using a completely randomized design. The results indicated a significant impact of both hydrogel-type dose and water dose on onion plant growth, as evidenced by various vegetation parameters. Among the hydrogels tested, Huminsorb® Polyacrylate produced the most favorable outcomes, with treatment T9 (100%, HP, 30 kg/ha) yielding 70.55 t/ha; this represented an increase of 11 t/ha as compared to the 100% ETc treatment without hydrogel application. Moreover, the combination of hydrogel application with 50% ETc water stress showed promising results, with treatment T4 (HP, 30 kg, 50%) producing almost the same yield as the 100% ETc treatment without hydrogel while saving 208 mm of water.
KW  - water economy
KW  - yield
KW  - deficit irrigation
KW  - hydrogel
KW  - onion
Y1  - 2023
U6  - https://doi.org/10.3390/w15111972
VL  - 15
IS  - 11
PB  - MDPI
CY  - Basel
ER  - 
TY  - CHAP
A1  - El Moussaoui, Noureddine
A1  - Kassmi, Khalil
A1  - Alexopoulos, Spiros
A1  - Schwarzer, Klemens
A1  - Chayeb, Hamid
A1  - Bachiri, Najib
T1  - Simulation studies on a new innovative design of a hybrid solar distiller MSDH alimented with a thermal and photovoltaic energy
T2  - Materialstoday: Proceedings
N2  - In this paper, we present the structure, the simulation the operation of a multi-stage, hybrid solar desalination system (MSDH), powered by thermal and photovoltaic (PV) (MSDH) energy. The MSDH system consists of a lower basin, eight horizontal stages, a field of four flat thermal collectors with a total area of 8.4 m2, 3 Kw PV panels and solar batteries. During the day the system is heated by thermal energy, and at night by heating resistors, powered by solar batteries. These batteries are charged by the photovoltaic panels during the day. More specifically, during the day and at night, we analyse the temperature of the stages and the production of distilled water according to the solar irradiation intensity and the electric heating power, supplied by the solar batteries. The simulations were carried out in the meteorological conditions of the winter month (February 2020), presenting intensities of irradiance and ambient temperature reaching 824 W/m2 and 23 °C respectively. The results obtained show that during the day the system is heated by the thermal collectors, the temperature of the stages and the quantity of water produced reach 80 °C and 30 Kg respectively. At night, from 6p.m. the system is heated by the electric energy stored in the batteries, the temperature of the stages and the quantity of water produced reach respectively 90 °C and 104 Kg for an electric heating power of 2 Kw. Moreover, when the electric power varies from 1 Kw to 3 Kw the quantity of water produced varies from 92 Kg to 134 Kg. The analysis of these results and their comparison with conventional solar thermal desalination systems shows a clear improvement both in the heating of the stages, by 10%, and in the quantity of water produced by a factor of 3.
Y1  - 2021
U6  - https://doi.org/10.1016/j.matpr.2021.03.115
SN  - 2214-7853
N1  - The Fourth edition of the International Conference on Materials & Environmental Science (ICMES 2020), virtual conference, November 18-28, 2020, Morocco
VL  - 45
IS  - 8
SP  - 7653
EP  - 7660
PB  - Elsevier
CY  - Amsterdam
ER  -