نتایج جستجو برای: elevated co2

تعداد نتایج: 234564  

Journal: :Global change biology 2014
A Christopher Oishi Sari Palmroth Kurt H Johnsen Heather R McCarthy Ram Oren

Soil CO2 efflux (Fsoil ) is the largest source of carbon from forests and reflects primary productivity as well as how carbon is allocated within forest ecosystems. Through early stages of stand development, both elevated [CO2] and availability of soil nitrogen (N; sum of mineralization, deposition, and fixation) have been shown to increase gross primary productivity, but the long-term effects ...

Journal: :Tree physiology 2001
P Maillard J M Guehl J F Muller P Gross

Pedunculate oak (Quercus robur L.) seedlings were grown for 3 or 4 months (second- and third-flush stages) in greenhouses at two atmospheric CO2 concentrations ([CO2]) (350 or 700 micromol mol(-1)) and two nitrogen fertilization regimes (6.1 or 0.61 mmol N l(-1) nutrient solution). Combined effects of [CO2] and nitrogen fertilization on partitioning of newly acquired carbon (C) and nitrogen (N)...

1999
Yiqi Luo Dafeng Hui Weixin Cheng James S. Coleman Dale W. Johnson Daniel A. Sims

Due to past limitations in experimental technology, canopy function has generally been inferred from leaf properties through scaling and/or indirect measurements. The development of a facility (EcoCELLs) at the Desert Research Institute has now made it possible to directly measure canopy gas exchange. In this experiment, sunflowers (Helianthus annus) were planted in the EcoCELLs and grown under...

Journal: :Annals of botany 2015
Ladislav Šigut Petra Holišová Karel Klem Mirka Šprtová Carlo Calfapietra Michal V Marek Vladimír Špunda Otmar Urban

BACKGROUND AND AIMS Plants growing under elevated atmospheric CO2 concentrations often have reduced stomatal conductance and subsequently increased leaf temperature. This study therefore tested the hypothesis that under long-term elevated CO2 the temperature optima of photosynthetic processes will shift towards higher temperatures and the thermostability of the photosynthetic apparatus will inc...

2017
Edmund M. Ryan Kiona Ogle Tamara J. Zelikova Dan R. Lecain David G. Williams Jack A. Morgan Elise Pendall ELISE PENDALL

Terrestrial plant and soil respiration, or ecosystem respiration (Reco), represents a major CO2 flux in the global carbon cycle. However, there is disagreement in how Reco will respond to future global changes, such as elevated atmosphere CO2 and warming. To address this, we synthesized six years (2007–2012) of Reco data from the Prairie Heating And CO2 Enrichment (PHACE) experiment. We applied...

Journal: :Global change biology 2015
Edmund M Ryan Kiona Ogle Tamara J Zelikova Dan R LeCain David G Williams Jack A Morgan Elise Pendall

Terrestrial plant and soil respiration, or ecosystem respiration (Reco ), represents a major CO2 flux in the global carbon cycle. However, there is disagreement in how Reco will respond to future global changes, such as elevated atmosphere CO2 and warming. To address this, we synthesized six years (2007-2012) of Reco data from the Prairie Heating And CO2 Enrichment (PHACE) experiment. We applie...

2007
G. B. Runion S. A. Prior H. H. Rogers H. A. Torbert

Elevated atmospheric carbon dioxide (CO2) can affect both the quantity and quality of plant tissues produced, which will impact the cycling and storage of carbon (C) within plant/soil systems and thus the rate of CO2 release back to the atmosphere. Research is needed to more accurately quantify the effects of elevated CO2 and associated feedbacks on soil CO2 efflux in order to predict the poten...

2017
Xiao Fang Zhu Xu Sheng Zhao Bin Wang Qi Wu Ren Fang Shen

Carbon dioxide (CO2) is involved in plant growth as well as plant responses to abiotic stresses; however, it remains unclear whether CO2 is involved in the response of rice (Oryza sativa) to aluminum (Al) toxicity. In the current study, we discovered that elevated CO2 (600 μL·L-1) significantly alleviated Al-induced inhibition of root elongation that occurred in ambient CO2 (400 μL·L-1). This p...

2013
Bridie J. M. Allan Paolo Domenici Mark I. McCormick Sue-Ann Watson Philip L. Munday

Recent research has shown that exposure to elevated carbon dioxide (CO2) affects how fishes perceive their environment, affecting behavioral and cognitive processes leading to increased prey mortality. However, it is unclear if increased mortality results from changes in the dynamics of predator-prey interactions or due to prey increasing activity levels. Here we demonstrate that ocean pCO2 pro...

Journal: :پژوهش های زراعی ایران 0
محمود شور فرزاد مندنی

increasing atmospheric co2 concentrations and nutrients supply are generally expected to enhance photosynthesis and growth of crops as a result considerably increase yields. the present study aims to investigate effects of elevated co2 and different fertilizer conditions on physiological traits in lemon balm. a factorial experiment was conducted based on completely randomized design with three ...

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