FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4240794196> ?p ?o ?g. }

• W4240794196 abstract "Abstract. Seasonal and spatial variations in foliar nitrogen (N) parameters were investigated in three European forests with different tree species, viz. beech (Fagus sylvatica L.), Douglas fir (Pseudotsuga menziesii, Mirb., Franco) and Scots pine (Pinus sylvestris L.) in Denmark, The Netherlands and Finland, respectively. This was done in order to obtain information about functional acclimation, tree internal N conservation and its relevance for both ecosystem internal N cycling and foliar N exchange with the atmosphere. Leaf N pools generally showed much higher seasonal variability in beech trees than in the coniferous canopies. The concentrations of N and chlorophyll in the beech leaves were synchronized with the seasonal course of solar radiation implying close physiological acclimation, which was not observed in the coniferous needles. During phases of intensive N metabolism in the beech leaves, the NH4+ concentration rose considerably. This was compensated for by a strong pH decrease resulting in relatively low Γ values (ratio between tissue NH4+ and H+). The Γ values in the coniferous were even smaller than in beech, indicating low probability of NH3 emissions from the foliage to the atmosphere as an N conserving mechanism. The reduction in foliage N content during senescence was interpreted as N re-translocation from the senescing leaves into the rest of the trees. The N re-translocation efficiency (ηr) ranged from 37 to 70% and decreased with the time necessary for full renewal of the canopy foliage. Comparison with literature data from in total 23 tree species showed a general tendency for ηr to on average be reduced by 8% per year the canopy stays longer, i.e. with each additional year it takes for canopy renewal. The boreal pine site returned the lowest amount of N via foliage litter to the soil, while the temperate Douglas fir stand which had the largest peak canopy N content and the lowestηr returned the highest amount of N to the soil. These results support the hypothesis that a high N status, e.g. as a consequence of chronically high atmospheric N inputs, increases ecosystem internal over tree-bulk-tissue internal N cycling in conifer stands. The two evergreen tree species investigated in the present study behaved very differently in all relevant parameters, i.e. needle longevity, Nc and ηr, showing that generalisations on tree internal vs. ecosystem internal N cycling cannot be made on the basis of the leaf habit alone." @default.
• W4240794196 created "2022-05-12" @default.
• W4240794196 creator A5008567312 @default.
• W4240794196 creator A5024157483 @default.
• W4240794196 creator A5030415009 @default.
• W4240794196 creator A5036345856 @default.
• W4240794196 creator A5042324289 @default.
• W4240794196 creator A5057893502 @default.
• W4240794196 creator A5083728216 @default.
• W4240794196 date "2012-07-31" @default.
• W4240794196 modified "2023-10-01" @default.
• W4240794196 title "Interactions between leaf nitrogen status and longevity in relation to N cycling in three contrasting European forest canopies" @default.
• W4240794196 cites W131596714 @default.
• W4240794196 cites W1612797623 @default.
• W4240794196 cites W1639261044 @default.
• W4240794196 cites W1766134403 @default.
• W4240794196 cites W1981977817 @default.
• W4240794196 cites W1989195882 @default.
• W4240794196 cites W1999450809 @default.
• W4240794196 cites W2003156834 @default.
• W4240794196 cites W2004917873 @default.
• W4240794196 cites W2008229107 @default.
• W4240794196 cites W2013123638 @default.
• W4240794196 cites W2014025078 @default.
• W4240794196 cites W2017087817 @default.
• W4240794196 cites W2020162175 @default.
• W4240794196 cites W2021178380 @default.
• W4240794196 cites W2025004527 @default.
• W4240794196 cites W2033684682 @default.
• W4240794196 cites W2037816800 @default.
• W4240794196 cites W2039711835 @default.
• W4240794196 cites W2042315169 @default.
• W4240794196 cites W204339779 @default.
• W4240794196 cites W2046600498 @default.
• W4240794196 cites W2049216479 @default.
• W4240794196 cites W2052363209 @default.
• W4240794196 cites W2052494958 @default.
• W4240794196 cites W2059679174 @default.
• W4240794196 cites W2062639723 @default.
• W4240794196 cites W2075015345 @default.
• W4240794196 cites W2084354167 @default.
• W4240794196 cites W2085037567 @default.
• W4240794196 cites W2087623599 @default.
• W4240794196 cites W2098926374 @default.
• W4240794196 cites W2099083831 @default.
• W4240794196 cites W2108937404 @default.
• W4240794196 cites W2115313924 @default.
• W4240794196 cites W2120670000 @default.
• W4240794196 cites W2121787597 @default.
• W4240794196 cites W2125374819 @default.
• W4240794196 cites W2128989762 @default.
• W4240794196 cites W2151169768 @default.
• W4240794196 cites W2160684210 @default.
• W4240794196 cites W2162624264 @default.
• W4240794196 cites W2164791872 @default.
• W4240794196 cites W2166083340 @default.
• W4240794196 cites W2169271265 @default.
• W4240794196 cites W2170519906 @default.
• W4240794196 cites W2175689700 @default.
• W4240794196 cites W2314732280 @default.
• W4240794196 cites W2317605050 @default.
• W4240794196 cites W2328865406 @default.
• W4240794196 cites W2334902041 @default.
• W4240794196 doi "https://doi.org/10.5194/bgd-9-9759-2012" @default.
• W4240794196 hasPublicationYear "2012" @default.
• W4240794196 type Work @default.
• W4240794196 citedByCount "1" @default.
• W4240794196 countsByYear W42407941962013 @default.
• W4240794196 crossrefType "posted-content" @default.
• W4240794196 hasAuthorship W4240794196A5008567312 @default.
• W4240794196 hasAuthorship W4240794196A5024157483 @default.
• W4240794196 hasAuthorship W4240794196A5030415009 @default.
• W4240794196 hasAuthorship W4240794196A5036345856 @default.
• W4240794196 hasAuthorship W4240794196A5042324289 @default.
• W4240794196 hasAuthorship W4240794196A5057893502 @default.
• W4240794196 hasAuthorship W4240794196A5083728216 @default.
• W4240794196 hasBestOaLocation W42407941961 @default.
• W4240794196 hasConcept C101000010 @default.
• W4240794196 hasConcept C119406331 @default.
• W4240794196 hasConcept C144027150 @default.
• W4240794196 hasConcept C205649164 @default.
• W4240794196 hasConcept C2776373379 @default.
• W4240794196 hasConcept C2776500793 @default.
• W4240794196 hasConcept C2779128174 @default.
• W4240794196 hasConcept C2780144066 @default.
• W4240794196 hasConcept C2910048773 @default.
• W4240794196 hasConcept C541528975 @default.
• W4240794196 hasConcept C59822182 @default.
• W4240794196 hasConcept C86803240 @default.
• W4240794196 hasConcept C97137747 @default.
• W4240794196 hasConceptScore W4240794196C101000010 @default.
• W4240794196 hasConceptScore W4240794196C119406331 @default.
• W4240794196 hasConceptScore W4240794196C144027150 @default.
• W4240794196 hasConceptScore W4240794196C205649164 @default.
• W4240794196 hasConceptScore W4240794196C2776373379 @default.
• W4240794196 hasConceptScore W4240794196C2776500793 @default.
• W4240794196 hasConceptScore W4240794196C2779128174 @default.
• W4240794196 hasConceptScore W4240794196C2780144066 @default.
• W4240794196 hasConceptScore W4240794196C2910048773 @default.
• W4240794196 hasConceptScore W4240794196C541528975 @default.

• next