Results 51 to 60 of about 7,505 (228)

Cytokinins in Vegetative and Reproductive Buds of Pseudotsuga menziesii [PDF]

open access: yesPlant Physiology, 1990
Immunoaffinity techniques using columns of immobilized antibodies raised against zeatin riboside and isopentenyladenosine were found to be effective in isolating cytoklnins from vegetative, female, and male buds of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco).
Morris, J.W.   +3 more
openaire   +3 more sources

Comprehensive framework for assessing and optimizing existing research networks

open access: yesConservation Biology, EarlyView.
Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East   +2 more
wiley   +1 more source

Faunistic spider collections in the Museum für Naturkunde Berlin: The collection of Erich Hesse [PDF]

open access: yes, 2012
The ‘Hesse collection’ of spiders (Araneae) and harvestmen (Opiliones) in the Museum für Naturkunde Berlin is documented. Biographical notes on Erich Hesse – a former arachnid curator at the museum (1921–1940) – are provided.
Kielhorn, Karl-Hinrich   +2 more
core   +1 more source

Nutrition of Douglas-fir in four different regions of the Czech Republic

open access: yesJournal of Forest Science, 2019
Soil properties and foliar chemistry of Douglas-fir stands were evaluated in four regions with historical cultivation of this introduced species in the Czech Republic.
Vít Šrámek   +2 more
doaj   +1 more source

The Parasitoid Wasp Glyptapanteles porthetriae Induces a Photoperiod‐Dependent Diapause‐Like State in Its Potential Overwintering Host Lasiocampa quercus

open access: yesEntomologia Experimentalis et Applicata, EarlyView.
We evaluated Lasiocampa quercus as an overwintering host for the koinobiont larval endoparasitoid Glyptapanteles porthetriae by exposing parasitized larvae to different environmental conditions and comparing parasitoid development with that in the primary host Lymantria dispar.
Thomas Zankl, Christa Schafellner
wiley   +1 more source

Mapping Species at an Individual-Tree Scale in a Temperate Forest, Using Sentinel-2 Images, Airborne Laser Scanning Data, and Random Forest Classification

open access: yesRemote Sensing, 2020
Detailed information about tree species composition is critical to forest managers and ecologists. In this study, we used Sentinel-2 imagery in combination with a canopy height model (CHM) derived from airborne laser scanning (ALS) to map individual tree
Veerle Plakman   +3 more
doaj   +1 more source

Tree growth response and adaptation to climate change and climate extremes: From canopy to stem

open access: yesJournal of Integrative Plant Biology, EarlyView.
This review synthesizes the responses and adaptations of tree growth, including canopy phenology, intra‐annual wood formation dynamics, and annual stem growth, to climate change and climate extremes. It highlights key knowledge gaps for future research to support sustainable forest management and enhance forest carbon storage under ongoing climate ...
Feiyu Yang   +8 more
wiley   +1 more source

Long‐term effects of clear‐cutting forestry on ectomycorrhizal fungi in boreal forest

open access: yesNew Phytologist, EarlyView.
Summary Clear‐cutting is detrimental to ectomycorrhizal fungi in a short time perspective, but long‐term effects on species richness and community composition are uncertain. To evaluate ecological sustainability of rotation forestry, we examined to what extent communities similar to those in old forests develop within the time frame of a rotation ...
Björn D. Lindahl   +3 more
wiley   +1 more source

Pseudotsuga sp.

open access: yes, 2011
Pseudotsuga sp., Maturing female cones.
Hugh D. Wilson
core  

Fine‐root trait variation in temperate trees follows arc‐shape pattern along deep soil profiles

open access: yesNew Phytologist, EarlyView.
Root trait variation along the soil depth profile in four temperate tree species. Summary Roots are plants' interface with the soil, controlling access to water and nutrients. Yet, fine‐root trait variation along deep soil profiles and its functional implications remain poorly understood.
Katrin Pietig   +3 more
wiley   +1 more source

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