Longevity of needle fascicles of Pinus longaeva (Bristlecone pine) and other North American pines

  title={Longevity of needle fascicles of Pinus longaeva (Bristlecone pine) and other North American pines},
  author={Frank W. Ewers and Rudolf Schmid},
SummaryVariation in leaf longevity of gymnosperms has received surprisingly little attention despite its likely adaptive significance. [] Key Result Literature data for the 37 species of Pinus native to the United States and Canada and field data for eight taxa (21 populations) of pines growing at various elevations in California each show a strong positive correlation between elevation and DSR, respectively, r=+0.65, df=35, p<0.001 and r=+0.82; df=19, p<0.001. We propose that extended needle fascicle…
Variation in needle longevity of Pinus tabulaeformis forests at different geographic scales.
  • Y. Xiao
  • Environmental Science
    Tree physiology
  • 2003
Foliage retention of Chinese pine stands at the regional level was generally associated with climatic variability, indicating that variation in needle longevity was primarily an environmental acclimation to low temperature in winter.
Ecological roles of five-needle pine in Colorado: Potential consequences of their loss
Abstract —Limber pine ( Pinus flexilis James) and Rocky Mountainbristlecone pine ( Pinus aristata Engelm.) are two white pines thatgrow in Colorado. Limber pine has a broad distribution
Scots pine needle longevity and other shoot characteristics along pollution gradients
Branches of adult Scots pine (Pinus sylvestris L.) trees were sampled from boreal dry pine forests to study needle longevity, its variation and its relation to other shoot characteristics. The stands
Severity of Swiss needle cast in young and mature Douglas-fir forests in western Oregon, USA.
Anatomical changes with needle length are correlated with leaf structural and physiological traits across five Pinus species.
It is found that increasing needle length contributed to a trade-off between the relative fractions of support versus photosynthetic tissue (mesophyll) across species, which reflected in leaf mechanical support and physiological capacity.
The longevity of functional connections between leaf traces and stem xylem in 16 species of conifers to better understand the spatial use of sapwood for water transport and the spatial pattern of water flux in sapwood is investigated.
Do gymnosperm needles pull water through the xylem produced in the same year as the needle?
This research investigated the longevity of functional connections between leaf traces and stem xylem in 16 species of conifers to better understand the spatial use of sapwood for water transport and the spatial pattern of water flux in sapwood.
Tree growth and needle dynamics of P. nigra and P. sylvestris and their response to climate and fire disturbances
Tree growth analysis revealed growth reductions in relation to wildfire events; with NTM confirming high needle shed of all needle age classes; and the first use of NTM to record fire events indirectly.
Phosphorus and nitrogen limitations to photosynthesis in Rocky Mountain bristlecone pine (Pinus aristata) in Colorado.
Because P is a limiting nutrient, increased anthropogenic N availability at sites in the Front Range may cause adverse effects on photosynthesis, and perhaps growth, in the future.
Soil type affects nitrogen conservation in foliage of small Pinus sylvestris L. trees
Nutrient conservation in plants and soil fertility may be intricately linked. We studied nitrogen conservation in small Scots pine (Pinus sylvestrisL.) trees growing in stands on organogenic Dystric


Field Measurements of the Metabolic Responses of Bristlecone Pine and Big Sagebrush in the White Mountains of California
The bristlecone pine plants (saplings) were relatively insensitive to the change in environmental conditions during the course of the summer of study, which included an extended drought period and the sagebrush plants, however, showed marked fluctuations in metabolic responses during the growing season.
Growth pattern ofAbies mariesii saplings under conditions of open-growth and suppression
  • T. Kohyama
  • Environmental Science
    The botanical magazine = Shokubutsu-gaku-zasshi
  • 2006
The lateral branches showed plastic changes in their growth characters in order to expand and maintain an assimilation system effectively, under conditions of suppression, and resulted in the observed difference in the crown shape of saplings in the different habitats.
Ozone injury to the foliage of Pinus ponderosa
Needles of ponderosa pine treated with 0.5 ppm ozone for 9-18 days under field conditions developed a chlorotic mottle, terminal die-back, and abscission similar to the needle symptoms of chlorotic
Bristlecone Pine: Science and Esthetics
A 7100-year tree-ring chronology has been developed for bristlecone pine, Pinus aristata Engelm., in the White Mountains of east-central California by the addition of data from long-dead specimens to
The Pygmy Forest Region of Northern California: Studies on Biomass and Primary Productivity
A most striking effect of soil on vegetation occurs on the coastal terraces of Mendocino County, northern California (longitude 123? 50' W, latitude 39? 20' N). Giant forests of the coastal redwood
Characters of Pinus: The Lateral Cone
  • G. Shaw
  • Environmental Science
    Botanical Gazette
  • 1907
Characters which have been considered by some authors to be of weighty significance in the determination not only of species but of comprehensive sections of the genus are found in the same species.
Edaphic Climax Pattern of the Pygmy Forest Region of California
A ranking of stands along a soil nutrient gradient, based on field observations and presence data for species, correlated successively less strongly with ordinations computed by similarity—projection, Bray—Curtis method, importance— projection, principal components analysis, and factor analysis.
A Study of Pinus balfouriana Grev. & Balf. (Pinaceae)
The two allopatric populations of Pinus balfouriana are distinct in many characteristics of the foliage, bark, cones, and seeds. With respect to some of these characteristics, the population in the
It is concluded that for some plants the peak photosynthesis capacity is reached at the time of maturity of the photosynthetic organ or structure, but in conifers the peak is not reached until the leaves are several years old.
Development of long-shoot terminal buds of western white pine (Pinus monticola)
Long-shoot terminal bud development in western white pine was studied throughout the annual growth cycle to determine the phenology of LSTB development and the time of cone-bud differentiation.