Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.)
Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into...
Ausführliche Beschreibung
Gespeichert in:
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1992 |
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| Umfang: |
7 |
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| Reproduktion: |
Springer Online Journal Archives 1860-2002 |
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| Übergeordnetes Werk: |
in: Trees - 1986, 6(1992) vom: Feb., Seite 96-102 |
| Übergeordnetes Werk: |
volume:6 ; year:1992 ; month:02 ; pages:96-102 ; extent:7 |
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| 520 | |a Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. | ||
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(DE-627)NLEJ205972799 DE-627 ger DE-627 rakwb eng Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.) 1992 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. Springer Online Journal Archives 1860-2002 Stickan, Walter oth Zhang, Ximing oth in Trees 1986 6(1992) vom: Feb., Seite 96-102 (DE-627)NLEJ188992685 (DE-600)1463920-8 1432-2285 nnns volume:6 year:1992 month:02 pages:96-102 extent:7 http://dx.doi.org/10.1007/BF00226587 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 6 1992 2 96-102 7 |
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(DE-627)NLEJ205972799 DE-627 ger DE-627 rakwb eng Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.) 1992 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. Springer Online Journal Archives 1860-2002 Stickan, Walter oth Zhang, Ximing oth in Trees 1986 6(1992) vom: Feb., Seite 96-102 (DE-627)NLEJ188992685 (DE-600)1463920-8 1432-2285 nnns volume:6 year:1992 month:02 pages:96-102 extent:7 http://dx.doi.org/10.1007/BF00226587 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 6 1992 2 96-102 7 |
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(DE-627)NLEJ205972799 DE-627 ger DE-627 rakwb eng Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.) 1992 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. Springer Online Journal Archives 1860-2002 Stickan, Walter oth Zhang, Ximing oth in Trees 1986 6(1992) vom: Feb., Seite 96-102 (DE-627)NLEJ188992685 (DE-600)1463920-8 1432-2285 nnns volume:6 year:1992 month:02 pages:96-102 extent:7 http://dx.doi.org/10.1007/BF00226587 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 6 1992 2 96-102 7 |
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(DE-627)NLEJ205972799 DE-627 ger DE-627 rakwb eng Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.) 1992 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. Springer Online Journal Archives 1860-2002 Stickan, Walter oth Zhang, Ximing oth in Trees 1986 6(1992) vom: Feb., Seite 96-102 (DE-627)NLEJ188992685 (DE-600)1463920-8 1432-2285 nnns volume:6 year:1992 month:02 pages:96-102 extent:7 http://dx.doi.org/10.1007/BF00226587 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 6 1992 2 96-102 7 |
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(DE-627)NLEJ205972799 DE-627 ger DE-627 rakwb eng Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.) 1992 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. Springer Online Journal Archives 1860-2002 Stickan, Walter oth Zhang, Ximing oth in Trees 1986 6(1992) vom: Feb., Seite 96-102 (DE-627)NLEJ188992685 (DE-600)1463920-8 1432-2285 nnns volume:6 year:1992 month:02 pages:96-102 extent:7 http://dx.doi.org/10.1007/BF00226587 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 6 1992 2 96-102 7 |
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seasonal changes in co2 and h2o gas exchange of young european beech (fagus sylvatica l.) |
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Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.) |
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Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. |
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Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. |
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Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ205972799</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20210706191057.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070528s1992 xx |||||o 00| ||eng c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ205972799</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Seasonal changes in CO2 and H2O gas exchange of young European beech (Fagus sylvatica L.)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1992</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">7</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Summary The CO2 and H2O gas exchange of young beech trees (Fagus sylvatica L.) were measured over a growing season. Of particular interest was the adaptation of gas exchange to the low level of photon flux density in the understorey of the old beech. The recorded diurnal courses were subdivided into several classes of irradiance. The most frequent class was from only 30–40 μE * m-2 * s-1. Even at the highest irradiance values, no light saturation in assimilation occurred. The light compensation point lies below 3 μE * m-2 * s-1, because net dark respiration values are very low. Calculated from the initial slope of the light response curves a mean value of 0.02 mol CO2 * mol photons-1 shows a very efficient use of light be the young trees. At the optimal phase of assimilation, the relationship between the daily sum of irradiance and net photosynthesis is highly significantly correlated. Under the local climatic situation, the stomatal opening primarily depends on irradiance. In response to a change in irradiance, stomatal opening also changes rapidly. Therefore, there is only a loose relationship between transpiration rate and vapour pressure saturation deficit. Towards autumn, the transpiration coefficient (E/A-ratio, estimated under light saturation) increases strongly because net photosynthesis decreases simultaneously.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Springer Online Journal Archives 1860-2002</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Stickan, Walter</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Zhang, Ximing</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Trees</subfield><subfield code="d">1986</subfield><subfield code="g">6(1992) vom: Feb., Seite 96-102</subfield><subfield code="w">(DE-627)NLEJ188992685</subfield><subfield code="w">(DE-600)1463920-8</subfield><subfield code="x">1432-2285</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:6</subfield><subfield code="g">year:1992</subfield><subfield code="g">month:02</subfield><subfield code="g">pages:96-102</subfield><subfield code="g">extent:7</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://dx.doi.org/10.1007/BF00226587</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-SOJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">6</subfield><subfield code="j">1992</subfield><subfield code="c">2</subfield><subfield code="h">96-102</subfield><subfield code="g">7</subfield></datafield></record></collection>
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