Results 61 to 70 of about 23,896 (265)

Comparative evaluation of noninvasive DNA sampling and line transect surveys for spring density estimation of black grouse and capercaillie

Wildlife Biology, EarlyView.
Reliable abundance estimates provide essential information in ecology, conservation and management of many wild grouse populations. In this 3‐year study, we comparatively evaluate the suitability of traditional line transect distance sampling of flushed birds versus a spatial capture–recapture survey with noninvasive DNA samples for individual ...
Henrik Brøseth, Oddmund Kleven, Kjetil Bevanger   +2 more
wiley   +1 more source

Investigation of 137Cs and 90Sr transfer from sandy soil to Scots pine (Pinus sylvestris L.) rings

Journal of Environmental Engineering and Landscape Management, 2010
Artificial radionuclides entered the environment mostly as a result of nuclear explosions, accidents at nuclear power plants and are entering due to the operation of the nuclear industry.
Ingrida Pliopaitė Bataitienė, Donatas Butkus   +1 more
doaj   +1 more source

Variability of photosynthetic capacity and water relations of Pinus sylvestris L. in the field

, 2011
Measurements of dependence of photosynthetic electron transport on irradiance and analyses of stable isotope ratios (δ18O, δ13C, δ15N) were performed on 4 to 6-year-old pine trees (Pinus sylvestris L.) in the primeval forest reserve of Białowieża and on ...
P. Escher, Escher, Hans Peter, Pfanz, H., H. Rennenberg, U. Lüttge, C. Wittmann, Rennenberg, Heinz, K. Rakowski, Wittmann, C., R. Paluch, H. Pfanz, Paluch, R., Lüttge, Ulrich E., Rakowski, K.   +13 more
core   +1 more source

Landscape factors influencing predation on capercaillie nests by two competing mesopredators: pine marten and red fox

Wildlife Biology, EarlyView.
Predation by pine martens Martes martes and red foxes Vulpes vulpes is an important factor influencing the population dynamics of capercaillie Tetrao urogallus. However, there is a knowledge gap regarding the relative effects of these mesopredators on the reproductive success of capercaillie. To better understand how various landscape factors influence
Siow Yan Jennifer Angoh, Scott Michael Brainerd, Olivier Devineau, Morten Odden, Torfinn Jahren   +4 more
wiley   +1 more source

Polymorphism and differentiation in populations of Pinus sylvestris in the Ukrainian Carpathians

Vìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Bìologìâ, Ekologìâ, 2011
The analysis and synthesis of the data on allozyme structure, polymorphism and degree of genogeographic differentiation of mountain populations of Scots pine isolated in the Ukrainian Carpathians showed considerable genetic variability of foothill and ...
S. N. Sannikov, I. V. Petrova, T. V. Filipрova, S. N. Sannikova, T. V. Parpan, E. V. Egorov   +5 more
doaj   +1 more source

A Pine Is a Pine and a Spruce Is a Spruce--The Effect of Tree Species and Stand Age on Epiphytic Lichen Communities. [PDF]

PLoS ONE, 2016
With an increasing demand for forest-based products, there is a growing interest in introducing fast-growing non-native tree species in forest management. Such introductions often have unknown consequences for native forest biodiversity.
Sofia Bäcklund, Mari Jönsson, Joachim Strengbom, Andreas Frisch, Göran Thor   +4 more
doaj   +1 more source

Estimating red deer Cervus elaphus population density using drones in a steep and rugged terrain

Wildlife Biology, EarlyView.
Precise and accurate information about population density, crucial for wildlife management, is difficult to obtain for elusive species living in dense forests or steep and inaccessible terrain. Using unmanned aerial vehicles (UAVs), we developed a method for obtaining absolute population estimates of ungulates living in steep, rugged, and partly ...
Julie Bommerlund, Torbjørn Ergon, Simon Filhol, Atle Mysterud   +3 more
wiley   +1 more source

Embriogênse somática em Araucaria angustifolia (Bertol.) Kuntze, Pinus sylvestris (Linneaus) e Picea abies (Linneaus) Karsten: ontogênese, padrão de expressão proteica e do gene serk [PDF]

, 2009
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Agráricas, Programa de Pós-Graduação em Recursos Genéticos Vegetais, Florianópolis, 2009.O estudo dos mecanismos do desenvolvimento embrionário em plantas pode ser facilitado ...
Steiner, Neusa
core  

An integral model for natural regeneration of Pinus pinea L. in the Northern Plateau (Spain) = Modelo integral de regeneración natural para Pinus pinea L. en la Meseta Norte (España)

, 2013
Natural regeneration is an ecological key-process that makes plant persistence possible and, consequently, it constitutes an essential element of sustainable forest management.
Manso González, Rubén
core   +1 more source

Nests in trees are as good as or better than cliffs for two formerly persecuted, primarily cliff nesting eagles in Spain: a cautionary tale in defining the habitat of range‐restricted or threatened species

Wildlife Biology, EarlyView.
In the late‐20th century, golden and Bonelli's eagles suffered population declines on the Iberian Peninsula, partly due to human persecution. Habitat assessments – especially for Bonelli's eagles – always found or assumed strong associations with cliffs that provided nesting sites.
Ryan Baumbusch, Jesus Bautista, Jose Rafael Garrido, Ian Newton, Miguel Ferrer, Virginia Morandini   +5 more
wiley   +1 more source