scholarly journals Trade‐offs in juvenile growth potential vs. shade tolerance among subtropical rain forest trees on soils of contrasting fertility

2015 ◽  
Vol 30 (6) ◽  
pp. 845-855 ◽  
Author(s):  
Kerrie M. Sendall ◽  
Christopher H. Lusk ◽  
Peter B. Reich

2015 ◽  
Vol 31 (6) ◽  
pp. 541-552 ◽  
Author(s):  
Jennifer Read ◽  
Stéphane McCoy ◽  
Tanguy Jaffré

Abstract:Several monodominant rain-forest trees in New Caledonia have population size structures suggesting establishment following large-scale disturbance, with eventual replacement by shade-tolerant species predicted in the absence of future disturbance. Links of dominance and population dynamics to leaf-level photosynthesis were investigated in seedlings of 20 tree species from these forests, grown in experimental sun and shade conditions. In particular, we tested whether episodically regenerating (ER) species, including monodominants, have higher assimilation rates at high irradiances and lower tolerance of shade than continuously regenerating species (CR). ER species had higher maximum net assimilation rates (Amax-area) in sun plants (9.6 ± 0.4 μmol m−2 s−1) than CR species (6.2 ± 0.3 μmol m−2 s−1) and high plasticity, typical of shade-intolerant species, but monodominant species did not differ from other ER species. CR species had leaf-level traits consistent with shade tolerance, including lower dark respiration rates (Rd-area = 0.47 ± 0.03μmol m−2 s−1; Rd-mass = 7 ± 1 nmol g−1 s−1) than ER species (Rd-area = 0.63 ± 0.06 μmol m−2 s−1; Rd-mass = 11 ± 2 nmol g−1 s−1) in shade plants. Hence leaf-level assimilation traits were largely consistent with regeneration patterns, but do not explain why some shade-intolerant species can achieve monodominance.



2006 ◽  
Vol 170 (3) ◽  
pp. 561-579 ◽  
Author(s):  
David M. Newbery ◽  
George B. Chuyong ◽  
Lukas Zimmermann




2012 ◽  
Vol 69 (1) ◽  
pp. 61-69 ◽  
Author(s):  
Frederico Augusto Guimarães Guilherme ◽  
Tiago Osório Ferreira ◽  
Marco Antonio Assis ◽  
Pablo Vidal Torrado ◽  
Leonor Patrícia Cerdeira Morellato


2018 ◽  
Vol 228 ◽  
pp. 110-119
Author(s):  
Priya Davidar ◽  
François Munoz ◽  
Jean-Philippe Puyravaud ◽  
D. Mohandass ◽  
V.S. Ramachandran


1991 ◽  
Vol 7 (3) ◽  
pp. 401-405 ◽  
Author(s):  
Andrew J. Lack
Keyword(s):  


Soil Science ◽  
1931 ◽  
Vol 32 (4) ◽  
pp. 326
Author(s):  
W. D. FRANCIS
Keyword(s):  


Author(s):  
R Sierra-de-Grado ◽  
V Pando ◽  
J Voltas ◽  
R Zas ◽  
J Majada ◽  
...  

Abstract Although the straightening capacity of the stem is key for light capture and mechanical stability in forest trees, little is known about its adaptive implications. Assuming that stem straightening is costly, trade-offs are expected with competing processes such as growth, maintenance and defences. We established a manipulative experiment in a common garden of Pinus pinaster including provenances typically showing either straight-stemmed or crooked-stemmed phenotypes. We imposed a bending up to 35º on plants aged nine years of both provenance groups and followed the straightening kinetics and shoot elongation after releasing. Eight months later, we destructively assessed biomass partitioning, reaction wood, wood microdensity, xylem reserve carbohydrates and phloem secondary metabolites. The experimental bending and release caused significant, complex changes with a marked difference between straight- and crooked-type plants. The straight-type recovered verticality faster and to a higher degree and developed more compression wood, while displaying a transitory delay in shoot elongation, reducing resource allocation to defences and maintaining the levels of non-structural carbohydrates compared to the crooked type. This combination of responses indicates the existence of intraspecific divergence in the reaction to mechanical stresses which may be related to different adaptive phenotypic plasticity.





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