Growth in Bupalus Piniarius
Author: P. Gruys
Publisher: Bernan Press(PA)
Published: 1970
Total Pages: 140
ISBN-13:
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Growth in Bupalus Piniarius (Lepidoptera: Geometridae) in Relation to Larval Population Density
Author: P. Gruys
Publisher:
Published: 1970
Total Pages: 127
ISBN-13: 9789022003008
DOWNLOAD EBOOK →Growth in Bupalus Piniarius
Responses of Bupalus Piniarius to Plant Quality Variation Generated by Larval Feeding
Proceedings of the 11th International Symposium on Insect-Plant Relationships
Author: Jens Kvist Nielsen
Publisher: Springer Science & Business Media
Published: 2013-06-29
Total Pages: 257
ISBN-13: 9401727767
DOWNLOAD EBOOK →The 11th International Symposium on Insect-Plant Relationships (SIP11), held on August 4-10, 2001, in Helsingør, Denmark, followed the tradition of previous SIP meetings and covered topics of different levels from chemistry, physiology, and ethology to ecology, genetics, and evolution of insect-plant relationships. The present volume includes a representative selection of fully refereed papers as well as a complete list of all the contributions which were presented at the meeting. Reviews of selected topics as well as original experimental data are included. The book provides valuable information for students and research workers interested in chemical and biological aspects of interactions between individuals and populations of different organisms.
Ecology Of Forest Insects
Author: A. Szujecki
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 616
ISBN-13: 9400948042
DOWNLOAD EBOOK →Few branches of the biological sciences have developed to such an extent as has ecology in the recent decades. The successful development of this science is directly related to need to create a sound scientific basis by which we can control our diminishing natural resources and integrate this with the control of biological systems of the component species. Studies on the bioenergetics of ecosystems, as well as on the home ostatic mechanisms functioning at the populations and biocenoses levels are of great importance in this respect. The results of these studies are very significant in forestry management which deals with multiannual tree communities - forest stands. It is particularly important in this of the necessity for the possible respect for economic planning, in view prolonged maintenance of forest biocenoses as stable systems. Neither in the present nor in the immediate future can be protection of forest ecosystems consisting of natural plant and animal communities be achieved by the cultivation of resistant forms or the intensification of chemical intervention.
Netherlands Journal of Zoology
Dendroecology
Author: Mariano M. Amoroso
Publisher: Springer
Published: 2017-12-12
Total Pages: 400
ISBN-13: 3319616692
DOWNLOAD EBOOK →Dendroecologists apply the principles and methods of tree-ring science to address ecological questions and resolve problems related to global environmental change. In this fast-growing field, tree rings are used to investigate forest development and succession, disturbance regimes, ecotone and treeline dynamics and forest decline. This book of global scope highlights state-of-the-science dendroecological contributions to paradigm-shifts in our understanding of ecophysiology, stand dynamics, disturbance interactions, forest decline and ecosystem resilience to global environmental change and is fundamental to better managing our forested ecosystems for the full range of ecosystem goods and services that they provide.
Improvement in Butt-log Grade with Increase in Tree Size, for Six Hardwood Species
Author: George R. Trimble (Jr.)
Publisher:
Published: 1965
Total Pages: 536
ISBN-13:
DOWNLOAD EBOOK →S2Work carried out by the Northeastern Forest Experiment Station in West Virginia in the past 12 years provides useful information about the relationships between tree d.b.h. and butt-log grade. The upper logs are not included in the relationships. Being smaller and containing more knots, these upper logs are generally of lower grade than the butt logs. Thus the average grade of all material in the sawlog portion of the tree is generally lower than the average grade of the butt log. In the West Virginia data, species differences in d.b.h.-grade relationship are readily apparent. This inherent tendency for species to have different proportions of the various grades in logs of the same size is a familiar phenomenon to grade-conscious foresters who work with hardwoods. The results in this paper provide a quantitative evaluation of this tendency for six of the local species.S3.
Mededeling
