Search
Browse by Subject
Contact Information

Northern Research Station
11 Campus Blvd., Suite 200
Newtown Square, PA 19073
(610) 557-4017
(610) 557-4132 TTY/TDD

You are here: NRS Home / Publications & Data / Publication Details
Publication Details

Title: Adaptation to exploit nitrate in surface soils predisposes yellow-cedar to climate-induced decline while enhancing the survival of western redcedar: a new hypothesis

Author: D'Amore, David V.; Hennon, Paul E.; Schaberg, Paul G.; Hawley, Gary J.

Year: 2009

Publication: Forest Ecology and Management. 258: 2261-2268.

Abstract: Yellow-cedar (Chamaecyparis nootkatensis (D. Don) Spach) and western redcedar (Thuja plicata Donn), two valuable tree species of Pacific Northwest forests, are competitive in low productivity forests on wet, nearly saturated soils with low nitrogen (N) availability and turnover. We propose a mechanism where cedar trees survive in marginal conditions through exploiting a coupled Ca-NO3-nutrient cycle where trees assimilate N as nitrate (NO3-), butmust accumulate a counter-ion to NO3- such as calcium (Ca+2) to control their internal cell pH and provide electrochemical balance. The availability of NO3- in cedar forests is favored by increased microbial activity and shifts in microbial community composition that is conducive to N mineralization and nitrification at higher pH. Cedars influence the soils under their canopy by enriching the forest floor with calciumcompounds leading to increases in pH.

Last Modified: 10/9/2009


Publication Toolbox

This document is in PDF format. You can obtain a free PDF reader from Adobe.