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Author: Ralph Leo Dix
Publisher:
ISBN:
Category : Grassland ecology
Languages : en
Pages : 130
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Book Description
Author: Ralph Leo Dix
Publisher:
ISBN:
Category : Grassland ecology
Languages : en
Pages : 130
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Book Description
Author: U.S. National Committee for the International Biological Program
Publisher:
ISBN:
Category : Biology
Languages : en
Pages : 132
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Book Description
Author: United States National Committee for the International Biological Program
Publisher:
ISBN:
Category : Biology
Languages : en
Pages : 176
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Book Description
Author: G. S. Innis
Publisher: Springer Science & Business Media
ISBN: 1461299292
Category : Science
Languages : en
Pages : 317
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Book Description
Perspectives on the ELM Model and Modeling Efforts This volume is the major open-literature description of a comprehensive, pioneering ecological modeling effort. The ELM model is one of the major outputs of the United States Grassland Biome study, a contribution to the International Biological Program (IBP). Writing this introduction provides wel come personal opportunity to (i) review briefly the state of the art at the beginning of the ELM modeling effort in 1971, (ii) to discuss some aspects of the ELM model's role in relation to other models and other phases of the Grassland Biome study, and (iii) to summarize the evolution of ELM or its components since 1973. Pre-Program Historical Perspective My first major contacts with ecological simulation modeling were in 1960 when I was studying intraseasonal herbage dynamics and nutrient production on foothill grasslands in southcentral Montana, making year-round measurements of the aboveground live vegetation, the standing dead, and the litter. Limitations in funding and the rockiness of the foothill soils prevented measuring the dynamics of the root biomass, both live and dead. Herbage biomass originates in live shoots from which it could be translocated into live roots or the live shoots could transfer to standing dead or to litter. Standing dead vegetation must end up in the litter and the live roots eventually transfer to dead roots. Obviously, the litter and the dead roots must decay away.
Author:
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 440
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 772
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Book Description
Author: N.R. French
Publisher: Springer Science & Business Media
ISBN: 1461261821
Category : Science
Languages : en
Pages : 215
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Book Description
This volume is a result of the summary and synthesis of data collected in the Grassland Biome Program, which is part of the American contribution to the International Biological Program (IBP). The purpose of this volume is to present a summary of quantitative ecological investigations of North American grass lands and to present a set of broad comparisons of their characteristics and functions as well as the results of some models and experiments that lead to practical considerations of the management of grasslands. Synthesis is a continuing activity in science. Early in the Grassland Biome Program there was a synthesis of literature data on grasslands, edited by R. L. Dix and R. G. Beidleman (1969). Results of the first year of field data collection under this program were synthesized in a volume edited by N. R. French (1971). Development of the large-scale model constructed to depict the processes and the dynamics of state variables in grassland ecosystems was presented by Innis (1978). Soon to appear will be two volumes integrating studies of American grasslands with IBP studies in other grasslands of the world (Coupland, in press) and the application of systems analysis to understanding grassland function and utilization (Breymeyer and Van Dyne, in press). The present volume presents current results and comparisons of field investigations and experimental studies that were conducted under this program.
Author: Ralph L. Dix
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 462
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Author: Intermountain Forest and Range Experiment Station (U.S.)
Publisher:
ISBN:
Category : Botany, Economic
Languages : en
Pages : 514
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Author: United States. National Committee for the International Biological Program
Publisher:
ISBN:
Category : Biology
Languages : en
Pages : 534
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Book Description
