Red alder: a state of knowledge.

Deal, Robert L.; Harrington, Constance A.

doi:10.2737/pnw-gtr-669

Cited by 10 publications

(6 citation statements)

References 22 publications

(69 reference statements)

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“…Thus it has been hypothesized that mixtures of these N-fixing and non-N-fixing species could yield more productive forests [38][39][40]. Presence of A. rubra may be especially important in increasing forest productivity (e.g., [16,[38][39][40][41][42][43][44]) via N additions to soils [37,[45][46][47]. This is important because low levels of soil N can limit growth in many PNW, USA forests (but see Binkley et al [44]).…”

Section: Introductionmentioning

confidence: 99%

Diversity-Carbon Flux Relationships in a Northwest Forest

et al. 2011

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While aboveground biomass and forest productivity can vary over abiotic gradients (e.g., temperature and moisture gradients), biotic factors such as biodiversity and tree species stand dominance can also strongly influence biomass accumulation. In this study we use a permanent plot network to assess variability in aboveground carbon (C) flux in forest tree annual aboveground biomass increment (ABI), tree aboveground net primary productivity (ANPPtree), and net soil CO2 efflux in relation to diversity of coniferous, deciduous, and a nitrogen (N)-fixing tree species (Alnus rubra). Four major findings arose: (1) overstory species richness and indices of diversity explained between one third and half of all variation in measured aboveground C flux, and diversity indices were the most robust models predicting measured aboveground C flux; (2) trends suggested decreases in annual tree biomass increment C with increasing stand dominance for four of the five most abundant tree species; (3) the presence of an N-fixing tree species (A. rubra) was not related to changes in aboveground C flux, was negatively related to soil CO2 efflux, and showed only a weak negative relationship with aboveground C pools; and (4) stands with higher overstory richness and diversity typically had higher soil CO2 efflux. Interestingly, presence of the N-fixing species was not correlated with soil inorganic N pools, and inorganic N pools were not correlated with any C flux or pool measure. We also did not detect any strong patterns between forest tree diversity and C pools, suggesting potential balancing of increased C flux both into and out of diverse forest stands. These data highlight variability in second-growth forests that may have implications for overstory community drivers of C dynamics

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Section: Introductionmentioning

confidence: 99%

Diversity-Carbon Flux Relationships in a Northwest Forest

et al. 2011

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“…Beginning around 1960, an increasing number of publications appeared, and today there is a growing literature on alder biology and management, a considerable part of which is based on formal experimentation. Major summary publications are Worthington and others 1962, Trappe and others 1968, Briggs and others 1978, Heebner and Bergener 1983, Hibbs and others 1994, and Deal and Harrington 2006. DeBell (2006 gave an overall review of the history of red alder research and changing attitudes.…”

Section: Red Alder As a Timber Speciesmentioning

confidence: 99%

“…DeBell (2006 gave an overall review of the history of red alder research and changing attitudes. The various papers included in Deal and Harrington (2006) showed that production in managed alder plantations considerably exceeds that in natural stands, and suggested that 93 Figure 33-A precommercially thinned plot in a noble fir spacing experiment. Noble fir has been widely planted at higher elevations.…”

Section: Red Alder As a Timber Speciesmentioning

confidence: 99%

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Silvicultural research and the evolution of forest practices in the Douglas-fir region.

Curtis¹,

DeBell²,

Miller³

et al. 2007

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The Forest Service of the U.S. Department of Agriculture is dedicated to the principle of multiple use management of the Nation's forest resources for sustained yields of wood, water, forage, wildlife, and recreation. Through forestry research, cooperation with the States and private forest owners, and management of the National Forests and national grasslands, it strives-as directed by Congress-to provide increasingly greater service to a growing Nation. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable sex, marital status, familial status, parental status, religion, sexual orientation genetic information, political beliefs, reprisal, or because all or part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.

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“…Historically, red alder has received less research attention than some of the widespread conifer species of the region. However, more recently, the values of red alder as an important component of ecosystems and as a timber crop are being recognized, and thus more attention is being paid to this species ( Deal & Harrington, 2006 ; Harrington, 2006 ). Red alder plays an important role in northwestern ecosystems by stabilizing streambanks, fixing nitrogen in soil, and providing food and cover for animals ( Harrington, 2006 ; Harrington et al, 2008 ).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of winter temperatures for satisfying chilling requirements for reproductive budburst of red alder (Alnus rubra)

Prevéy

Harrington

2018

PeerJ

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BackgroundExperiencing an adequate amount of cold temperatures over winter is necessary for many temperate tree species to break dormancy and flower in spring. Thus, changes in winter and spring temperatures associated with climate change may influence when trees break dormancy and flower in the future. There have been several experimental studies that have quantified the effectiveness of cold temperatures for chilling requirements for vegetative budburst of temperate trees; however, there are few experimental studies addressing the chilling requirements for reproductive budburst of trees, as it is difficult to place reproductively mature trees in temperature-controlled environments.MethodsTo identify how changing temperatures associated with climate change may impact reproductive phenology, we completed a temperature-controlled growth chamber experiment using cuttings of reproductive branches of red alder (Alnus rubra), one of the most widespread hardwood tree species of the Pacific Northwest, USA. The purpose of this study was to examine how colder (4 °C) and warmer (9 °C) winter temperature regimes influenced the timing of reproductive budburst of red alder cuttings in spring. We also compared the date of budburst of cuttings to that of branches from intact trees.ResultsWe found that cuttings flowered earlier after pretreatment with a 4 °C winter temperature regime than after a 9 °C winter temperature regime. We found no significant differences between the timing of male budburst of cuttings exposed to ambient conditions compared to male budburst of branches from intact trees. We used our experimental data to estimate a “possibility-line” that shows the accumulated chilling and forcing temperatures necessary prior to reproductive budburst of red alder.DiscussionThis study provides a preliminary indication that warmer winters with climate change may not be as effective as colder winters for satisfying chilling temperature requirements of a Northwest hardwood tree species.

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Red alder: a state of knowledge.

Cited by 10 publications

References 22 publications

Diversity-Carbon Flux Relationships in a Northwest Forest

Diversity-Carbon Flux Relationships in a Northwest Forest

Silvicultural research and the evolution of forest practices in the Douglas-fir region.

Effectiveness of winter temperatures for satisfying chilling requirements for reproductive budburst of red alder (Alnus rubra)

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