Filters: Tags: M1-Ecosystems (X) > partyWithName: Krebs, Charles J. (X)
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Residual effects of nutrient additions were sustained in shrubs 4-8 years after fertilization stopped in a northern boreal forest in Yukon, Canada. We measured the growth rate of grey willow (Salix glauca L.) and bog birch (Betula glandulosa Michx.) twigs during the growing seasons of 1998, 2001, and 2002, 4-8 years after NPK fertilization from 1987 to 1994 had ceased. We also measured the nitrogen concentration of the 1998 growth tissue. Willow twigs had significantly higher growth rates in previously fertilized shrubs than control shrubs in these 3 years, even greater than differences observed during fertilization. Willow also had higher N concentration in fertilized twigs than control twigs. Birch growth was...
Residual effects of nutrient additions were sustained in shrubs 4-8 years after fertilization stopped in a northern boreal forest in Yukon, Canada. We measured the growth rate of grey willow (Salix glauca L.) and bog birch (Betula glandulosa Michx.) twigs during the growing seasons of 1998, 2001, and 2002, 4-8 years after NPK fertilization from 1987 to 1994 had ceased. We also measured the nitrogen concentration of the 1998 growth tissue. Willow twigs had significantly higher growth rates in previously fertilized shrubs than control shrubs in these 3 years, even greater than differences observed during fertilization. Willow also had higher N concentration in fertilized twigs than control twigs. Birch growth was...
The following is a book review found at http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v416/n6882/full/416679a_fs.html in the journal Nature. Just as every picture tells a story, so too does every scientific project. This book is the story of the Kluane Boreal Forest Ecosystem Project, told brilliantly by the researchers who toiled for ten years from 1986 to uncover the drama and complexity of this Canadian ecosystem. Whoever wants to learn about the boreal forest of North America, one of the largest ecosystems of the world, and the stage on which a classic ecological drama — the ten-year population cycle of the snowshoe hare — is played out repeatedly, should definitely read this book. Equally...
The purpose of this annual report is to summarize for managers and interested members of the public some of the major, current findings of the monitoring program as well as other relevant research programs. The report begins with an oveview of KEMP. Selected research findings outside of KEMP but relevant to the monitoring project are also summarized in this report. Regarding the KEMP protocols, patterns of general interest or findings with management implications are the main focus of this report. Further details can be obtained by referring to the references cited here. This annual report is intended to be a standing report that the KEMP team adds to, edits or changes in appropriate ways once each year. Your comments...
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