Browsing School of Biological, Physical, Mathematics & Actuarial Sciences by Author "Tenhunen, John"
Now showing items 1-13 of 13
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The Afro-alpine dwarf shrub Helichrysum citrispinum favours understorey plants through microclimate amelioration
Schweiger, Andreas H.; Ochuodho, Dennis O.; Kulunge, Salum R.; Tenhunen, John (Taylor & Francis, 2015)Background: Positive plant–plant interactions similar to specialised plant growth forms are potential strategies to overcome the environmental harshness of Afro-alpine ecosystems. However, knowledge about plant–plant ... -
Canopy scale CO2 exchange and productivity of transplanted paddy and direct seeded rainfed rice production systems in S. Korea
Lindner, Steve; Xue, Wei; Nay-Htoon, Bhone; Choi, Jinsil; Ege, Yannic; Lichtenwald, Nikolas; Fischer, Fabian; Ko, Jonghan; Tenhunen, John; Ochuodho, Dennis O. (Elsevier, 2016)Rice (Oryza sativa L.) is a primary food crop that supports more than half the world population. Paddy rice accounts for more than 75% of the total global rice production but requires large amounts of water for irrigation. ... -
Carbon dioxide exchange and its regulation in the main agro-ecosystems of Haean catchment in South Korea
Lindner, Steve; Ochuodho, Dennis O.; Lee, Bora; Xue, Wei; Arnhold, Sebastian; Kwon, Hyojung; Huwe, Bernd; Tenhunen, John (Elsevier, 2015)The Asian agricultural landscape, which accounts for approximately 12.6% of the world’s agricultural land, is highly heterogeneous due to the multicultural cropping system. Information regarding CO2 exchange and carbon (C) ... -
Conditional variations in temperature response of photosynthesis, mesophyll and stomatal control of water use in rice and winter wheat
Xue, Wei; Ochuodho, Dennis O.; Ko, Jonghan; Werner, Christiane; Tenhunen, John (2016)Environmental responses of photosynthesis and CO2 diffusive conductance as fundamental information for photosynthesis-transpiration coupled model have been increasingly concerned while are still research areas with unanswered ... -
Diffuse PAR irradiance under clear skies in complex alpine terrain
Wang, Quan; Schmidt, Markus; Droesler, Matthias; Tenhunen, John; Ochuodho, Dennis O.; Kolcun, , Olimpia (Elsevier, 2004)The diffuse component of photosynthetically active radiation (PAR) is important for models that calculate carbon dioxide uptake in photosynthesis by vegetation. Few PAR measurements are usually available, especially in ... -
Effects of nitrogen deposition on soil organic carbon fractions in the subtropical forest ecosystems of S China
Yuelin Li, Xiaomei Chen; Mo, Jiangming; Ochuodho, Dennis O.; Tenhunen, John; Yan, Junhua; Liu, Juxiu; Zhang, Deqiang (2012)Experiments were conducted between 2003 and 2008 to examine how N additions influence soil organic C (SOC) and its fractions in forests at different succession stages in the subtropical China. The succession stages included ... -
Environmental controls on growing-season sap flow density of Quercus serrata Thunb in a temperate deciduous forest of Korea
Laiju, Nahida; Ochuodho, Dennis O.; Jung, Eun-Young; Lee, Bora; Tenhunen, John; Lim, Jong-Hwan; Sung, Joo-Han; Kang, Sinkyu (Ecological Society of Korea, 2012)Sap flux density (SFD) measurements were used, in combination with morphological characteristics of trees and forest structure, to calculate whole-tree transpiration, stand transpiration (St) and mean canopy stomatal ... -
Evaluation of seasonal variation of MODIS derived leaf area index at two European deciduous broadleaf forest sites
wang, Quan; Tenhunen, John; QuocDinh, Nguyen; Reichstein, Markus; Granie, Andre (Elsevier, 2005)We present an evaluation of the operational MODIS Leaf Area Index (LAI) product over two temperate deciduous forests and focus on the seasonal variation. Two EUROFLUX beech (Fagus sylvatica) sites, Hesse, France and Sorø, ... -
Interactive influence of livestock grazing and manipulated rainfall on soil properties in a humid tropical savanna
Okach, Daniel O.; Ondier, Joseph O; Kumar, Amit; Rambold, Gerhard; Tenhunen, John; Huwe, Bernd; Otieno, Dennis (Springer Berlin Heidelberg, 2018)Purpose The effect of uncontrolled grazing and unpredictable rainfall pattern on future changes in soil properties and processes of savanna ecosystems is poorly understood. This study investigated how rainfall amount at ... -
Quantification of ecosystem carbon exchange characteristics in a dominant subtropical evergreen forest ecosystem
Li, Yue-Lin; Zhou, Guo-Yi; Zhang, De-Qiang; Wenigmann, Katherine Owen; Ochuodho, Dennis O.; Tenhunen, John; Zhang, Qian-Mei (Korean Meteorological Society and Springer Netherlands, 2012)CO2 fluxes were measured continuously for three years (2003–2005) using the eddy covariance technique for the canopy layer with a height of 27 m above the ground in a dominant subtropical evergreen forest in Dinghushan, ... -
Soil water availability and capacity of nitrogen accumulation influence variations of intrinsic water use efficiency in rice
Lindne, Steve; Dubbert, Maren; Ochuodho, Dennis O.; Ko, Jonghan; Werne, Christiane; Tenhunen, John (Elsevier, 2016)Leaf intrinsic water use efficiency (WUEi) coupling maximum assimilation rate (Amax) and transpirable water lost via stomatal conductance (gsc) has been gaining increasing concern in sustainable crop production. Factors ... -
Supplement understanding of the relative importance of biophysical factors in determination of photosynthetic capacity and photosynthetic productivity in rice ecosystems
Xue, Wei; Lindner, Steve; Dubbert, Maren; Ochuodho, Dennis O.; Ko, Jonghan; Muraoka, Hiroyuki; Werne, Christiane; Tenhunen, John (Elsevier, 2016)Extensive variation in gross primary production (GPP) among growing seasons in rice ecosystems, which has previously been reported, may be caused by a number of biophysical factors. Two field-based studies, one on Oryza ... -
Water use by a warm-temperate deciduous forest under the influence of the Asian monsoon: contributions of the overstory and understory to forest water use
Jung, Eun-Young; Ochuodho, Dennis O.; Kwon, Hyojung; Lee, Bora; Lim, Jong-Hwan; Kim, Joon; Tenhunen, John (Elsevier, 2013)The warm temperate deciduous forests in Asia have a relatively dense understory, hence, it is imperative that we understand the dynamics of transpiration in both the overstory (E O) and understory (E U) of forest stands ...