scholarly journals A missing key to our understanding of forest carbon dynamics. A commentary on: ‘High nitrogen resorption efficiency of forest mosses’

2020 ◽  
Vol 125 (4) ◽  
pp. vi-vii
Author(s):  
Annika Nordin
Keyword(s):  
Carbon Dynamics ◽  
Forest Carbon ◽  
Resorption Efficiency ◽  
High Nitrogen ◽  
Nitrogen Resorption ◽  
Nitrogen Resorption Efficiency

scholarly journals The C:N:P Stoichiometry of Planted and Natural Larix principis-rupprechtii Stands along Altitudinal Gradients on the Loess Plateau, China

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 363
Author(s):  
Fujing Bo ◽  
Yunxiang Zhang ◽  
Han Y. H. Chen ◽  
Pingan Wang ◽  
Xuming Ren ◽  
...  
Keyword(s):  
Nutrient Cycling ◽  
Natural Forests ◽  
Resorption Efficiency ◽  
The Loess Plateau ◽  
Planted Forests ◽  
C:N:P Stoichiometry ◽  
Soil C ◽  
Nitrogen Resorption ◽  
N:P Ratios ◽  
Nitrogen Resorption Efficiency

Carbon:nitrogen:phosphorus (C:N:P) stoichiometry plays a critical role in nutrient cycling, biodiversity, and ecosystem functionality. However, our understanding of the responses of C:N:P stoichiometry to elevation and forest management remains elusive. Here we sampled 18 Larix principis-rupprechtii sites along altitudinal gradients (1700-2300 m) on Guandishan Mountain in the Loess Plateau, China. We determined the leaf, litter, and soil C N P contents and C:N:P stoichiometric ratios, as well as nutrient resorption efficiency (NuRE), and diameter at breast height (DBH) increments in both planted and natural stands, and then tested the impacts of elevation and stand origin on these parameters’ management. We found different C:N:P stoichiometry between natural and planted forests. The results revealed that: soil C, N, and N:P ratios, litter C:P and N:P ratios, leaf C:N and N:P ratios increased significantly; however, soil C:N ratios, litter P, leaf N and P, nitrogen resorption efficiency (NRE), and DBH increments decreased significantly with elevation in the planted forests. Soil C,N and N:P ratios, litter C, as well as C:N and C:P ratios increased significantly with elevation in natural forests. The soil N, P and N:P ratios, litter C:P and N:P ratios, leaf C, C:P and N:P ratios, nitrogen resorption efficiency (NRE), phosphorus resorption efficiency (PRE), and DBH increments were, on average, higher in the planted, rather than natural forests. Our results indicated that there was an enhancing P-limitation in both the planted and natural forests, and the plantations were more restricted by P. Moreover, compared to natural forests, plantations converged toward a higher conservative N- and P-use strategy by enhancing resorption efficiencies of internal nutrient cycling and a higher annual growth rate.

Nitrogen resorption efficiency in mature trees and seedlings of four tree species co-occurring in a Mediterranean environment

2014 ◽  
Vol 385 (1-2) ◽  
pp. 205-215 ◽  
Author(s):  
Sonia Mediavilla ◽  
Javier García-Iglesias ◽  
Patricia González-Zurdo ◽  
Alfonso Escudero
Keyword(s):  
Tree Species ◽  
Mediterranean Environment ◽  
Resorption Efficiency ◽  
Mature Trees ◽  
Nitrogen Resorption ◽  
Nitrogen Resorption Efficiency

Nitrogen resorption efficiency of perennial plant decreases with warming and nitrogen addition in desert steppe

2015 ◽  
Vol 35 (18) ◽  
Author(s):  
李元恒 LI Yuanheng ◽  
韩国栋 HAN Guodong ◽  
王珍 WANG Zhen ◽  
王正文 WANG Zhengwen ◽  
赵萌莉 ZHAO Mengli ◽  
...  
Keyword(s):  
Nitrogen Addition ◽  
Desert Steppe ◽  
Resorption Efficiency ◽  
Perennial Plant ◽  
Nitrogen Resorption ◽  
Nitrogen Resorption Efficiency

scholarly journals Nitrogen resorption efficiency in autumn leaves correlated with chlorophyll resorption, not with anthocyanin production

2021 ◽  
Author(s):  
Ines Pena-Novas ◽  
Marco Archetti
Keyword(s):  
Nitrogen Content ◽  
Anthocyanin Synthesis ◽  
Photooxidative Stress ◽  
Resorption Efficiency ◽  
Main Determinant ◽  
Nitrogen Resorption ◽  
Adaptive Value ◽  
Specific Variation ◽  
Anthocyanin Production ◽  
Nitrogen Resorption Efficiency

A prominent hypothesis for the adaptive value of anthocyanin production in the autumn leaves of some species of trees is that anthocyanins protect leaves from photooxidative stress at low temperatures, allowing a better resorption of nutrients, in particular, nitrogen, before leaf fall. While there is evidence that anthocyanins enable photoprotection, it is not clear whether this translates to improved nitrogen resorption and how this can explain inter-specific variation in autumn colours. A recent comparative analysis showed no correlation between temperature and anthocyanin production across species but did not analyse nitrogen content and nitrogen resorption efficiency. Here we provide this comparison by comparing the nitrogen content of mature and senescent leaves and their autumn colours in 55 species of trees. We find no correlation between the presence of anthocyanins and the efficiency of nitrogen resorption. We find, instead, that nitrogen resorption is more efficient in species with yellow autumn colours, pointing to chlorophyll resorption, rather than anthocyanin synthesis, as the main determinant of nitrogen resorption efficiency. Hence our results do not corroborate the photoprotection hypothesis as an explanation for the evolution of autumn colours.

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