Spatial distribution of major, trace and ultra trace elements in three Norway spruce (Picea abies) stands in boreal forests, Forsmark, Sweden

Geoderma ◽  
2010 ◽  
Vol 159 (3-4) ◽  
pp. 252-261 ◽  
Author(s):  
Christian B. Brun ◽  
Pasi Peltola ◽  
Mats E. Åström ◽  
Maj-Britt Johansson
Keyword(s):  
Trace Elements ◽  
Spatial Distribution ◽  
Picea Abies ◽  
Norway Spruce ◽  
Boreal Forests ◽  
Ultra Trace

Wood-inhabiting cryptogams on dead Norway spruce (Picea abies) trees in managed Swedish boreal forests

1999 ◽  
Vol 29 (2) ◽  
pp. 178-186 ◽  
Author(s):  
Nicholas Kruys ◽  
Clas Fries ◽  
Bengt Gunnar Jonsson ◽  
Tomas Lämås ◽  
Göran Ståhl
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Boreal Forests ◽  
Woody Debris ◽  
Large Diameter ◽  
Managed Forests ◽  
Red Lists ◽  
Dead Trees ◽  
Utilization Patterns ◽  
Specific Species

We surveyed the quantity and quality of dead Norway spruce (Picea abies (L.) Karst.) trees and wood-inhabiting cryptogams in a managed boreal forest landscape in northern Sweden. Size and decay of dead trees was related to substrate utilization by wood-inhabiting species. Coarse woody debris (CWD) was surveyed along 34 strip transects. CWD and wood-inhabiting cryptogams were surveyed in eight circular plots at each site. A total of 6195 spruce CWD units occurred along strip transects and 809 spruce CWD units in circular plots. On average 2.2 m3/ha spruce CWD was found on the plots. The majority (63%) of the transect CWD units were <10 cm diameter and in early to intermediate decay stages. Sixty-eight wood-specific species of fungi, lichens, mosses, and hepatics occurred on the plots. Of these, 13 occurred on [Formula: see text]5% of the 809 CWD units surveyed for wood-inhabiting species. Eight species occur on the Swedish red lists, indicating that such species are indeed uncommon in managed forests. Red-listed species showed strong preferences for large diameter CWD and CWD in late decay stages, i.e., substrates that are poorly represented in managed forests. Frequently occurring species, however, showed utilization patterns that correspond with the distribution of the substrate types.

scholarly journals Specific thylakoid protein phosphorylations are prerequisites for overwintering of Norway spruce (Picea abies) photosynthesis

2020 ◽  
Vol 117 (30) ◽  
pp. 17499-17509 ◽  
Author(s):  
Steffen Grebe ◽  
Andrea Trotta ◽  
Azfar Ali Bajwa ◽  
Ilaria Mancini ◽  
Pushan Bag ◽  
...  
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Boreal Forests ◽  
Molecular Mechanisms ◽  
Temperature Dependent ◽  
Artificial Induction ◽  
Photosynthetic Machinery ◽  
Freezing Temperatures ◽  
Sun And Shade ◽  
Evergreen Conifers

Coping of evergreen conifers in boreal forests with freezing temperatures on bright winter days puts the photosynthetic machinery in great risk of oxidative damage. To survive harsh winter conditions, conifers have evolved a unique but poorly characterized photoprotection mechanism, a sustained form of nonphotochemical quenching (sustained NPQ). Here we focused on functional properties and underlying molecular mechanisms related to the development of sustained NPQ in Norway spruce (Picea abies). Data were collected during 4 consecutive years (2016 to 2019) from trees growing in sun and shade habitats. When day temperatures dropped below −4 °C, the specific N-terminally triply phosphorylated LHCB1 isoform (3p-LHCII) and phosphorylated PSBS (p-PSBS) could be detected in the thylakoid membrane. Development of sustained NPQ coincided with the highest level of 3p-LHCII and p-PSBS, occurring after prolonged coincidence of bright winter days and temperatures close to −10 °C. Artificial induction of both the sustained NPQ and recovery from naturally induced sustained NPQ provided information on differential dynamics and light-dependence of 3p-LHCII and p-PSBS accumulation as prerequisites for sustained NPQ. Data obtained collectively suggest three components related to sustained NPQ in spruce: 1) Freezing temperatures induce 3p-LHCII accumulation independently of light, which is suggested to initiate destacking of appressed thylakoid membranes due to increased electrostatic repulsion of adjacent membranes; 2) p-PSBS accumulation is both light- and temperature-dependent and closely linked to the initiation of sustained NPQ, which 3) in concert with PSII photoinhibition, is suggested to trigger sustained NPQ in spruce.

scholarly journals Concentrations of nutritional and trace elements in needles of Norway spruce (Picea abies [L.] Karst.) as functions of the needle age class

1995 ◽  
Vol 168-169 (1) ◽  
pp. 305-312 ◽  
Author(s):  
A. Wyttenbach ◽  
P. Schleppi ◽  
L. Tobler ◽  
S. Bajo ◽  
J. Bucher
Keyword(s):  
Trace Elements ◽  
Picea Abies ◽  
Norway Spruce ◽  
Needle Age ◽  
Age Class
Sign in / Sign up

Export Citation Format

Share Document