LIFE HISTORY OF THE POPLAR BEETLE CHRYSOMELA TREMULAE F. IN THE CENTRAL REGION OF FRANCE

1993 ◽  
Vol 125 (2) ◽  
pp. 399-401 ◽  
Author(s):  
S. Augustin ◽  
J. Lévieux
Keyword(s):  
Life History ◽  
Biomass Production ◽  
Central Region ◽  
Populus Deltoides ◽  
Populus Trichocarpa ◽  
Leaf Beetles ◽  
Short Rotation ◽  
History Of ◽  
Polyphagous Insects ◽  
Poplar Leaf

The need to exploit new sources of energy has recently led France to encourage several research programs toward the cultivation of crops for biomass production to extract alcohol, glucides, and chips for burning. To produce large quantities of biomass rapidly, several species of Populus have been selectively tested in short rotation coppices on about 400 ha in several parts of the country.Among the practical consequences of this policy, one appears to be harmful, namely the spatial extension of several pests, mainly leaf eaters or polyphagous insects. These insects previously were located in poplar nurseries. Among the leaf eaters, larvae and adults of the poplar leaf beetles Chrysomela (= Melasoma) populi L. and Chrysomela tremulae F. feed on many poplar species in central France (e.g. Populus tremula L., Populus trichocarpa Torrey and Gray, Populus deltoides Bartram, Populus lasiocarpa Oliver).

Production physiology and morphology of Populus species and their hybrids grown under short rotation. III. Seasonal carbon allocation patterns from branches

1999 ◽  
Vol 29 (9) ◽  
pp. 1419-1432 ◽  
Author(s):  
G E Scarascia-Mugnozza ◽  
T M Hinckley ◽  
R F Stettler ◽  
P E Heilman ◽  
J G Isebrands
Keyword(s):  
Populus Deltoides ◽  
Carbon Allocation ◽  
Populus Trichocarpa ◽  
Main Stem ◽  
Short Rotation ◽  
Bud Set ◽  
Translocation Efficiency ◽  
Allocation Patterns ◽  
Populus Species ◽  
Old Trees

Seasonal patterns of photosynthates export were followed on 1- and 2-year-old trees of four Populus clones, belonging to the species Populus trichocarpa Torr. & Gray, Populus deltoides Bartr., and their interspecific hybrids grown in the field under short rotation. Different types of branches (including sylleptic and proleptic) and cohorts of leaves on the main stem were exposed to 14CO2 at monthly and bimonthly intervals in the first and second growing season. Patterns of photosynthates export were influenced by phenology and differed markedly among clones. Differences of translocation patterns were also found among various portions of the crown. Sylleptic branches exported carbon mainly to the lower stem and the roots, whereas main stem leaves, before bud set, contributed much to the height growth of the tree. Sylleptic branches also had greater translocation efficiency than proleptic, contributing more, on a per unit mass basis, to the growth of the tree. Within branches of the same order and among branches of different order, export of assimilates followed patterns similar to those found in the main stem. There was little export of assimilates between adjacent branches of the same order or between branches and main stem leaves. Clones 11-11 and 1-12, which had the highest number of sylleptic branches, were also the most productive clones, respectively, for the hybrids and the parental species.

scholarly journals Biomass production and carbon balance of a short rotation forestry of Populus deltoides (clone Lux) under two different cutting cycles

2016 ◽  
Vol 37 (1) ◽  
pp. 205-210 ◽  
Author(s):  
Antonio María Cabrera ◽  
Cristiano Tozzini ◽  
Sergio Espinoza ◽  
Rómulo Santelices ◽  
Fernando Meza
Keyword(s):  
Biomass Production ◽  
Carbon Balance ◽  
Populus Deltoides ◽  
Short Rotation

Experimental life history of Echinostoma cinetorchis

1990 ◽  
Vol 28 (1) ◽  
pp. 39 ◽  
Author(s):  
S H Lee ◽  
J Y Chai ◽  
S T Hong ◽  
W M Sohn
Keyword(s):  
Life History ◽  
History Of

Queering Gender Identity Work: A Life History of a Black Transgender Woman

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Esethu Monakali
Keyword(s):  
Life History ◽  
Gender Identity ◽  
Public Spaces ◽  
Identity Work ◽  
Social Identities ◽  
Gender And Sexuality ◽  
Ongoing Effort ◽  
History Of ◽  
The Individual

This article offers an analysis of the identity work of a black transgender woman through life history research. Identity work pertains to the ongoing effort of authoring oneself and positions the individual as the agent; not a passive recipient of identity scripts. The findings draw from three life history interviews. Using thematic analysis, the following themes emerge: institutionalisation of gender norms; gender and sexuality unintelligibility; transitioning and passing; and lastly, gender expression and public spaces. The discussion follows from a poststructuralist conception of identity, which frames identity as fluid and as being continually established. The study contends that identity work is a complex and fragmented process, which is shaped by other social identities. To that end, the study also acknowledges the role of collective agency in shaping gender identity.

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