scholarly journals Provenance variation in Pinus nigra at three sites in Northern Greece

2001 ◽  
Vol 58 (8) ◽  
pp. 893-900 ◽  
Author(s):  
Constantine Varelides ◽  
George Brofas ◽  
Yiannis Varelides
Keyword(s):  
Pinus Nigra ◽  
Northern Greece ◽  
Provenance Variation

scholarly journals Fertilization and Shading Trials to Promote Pinus nigra Seedlings’ Nursery Growth under the Climate Change Demands

2021 ◽  
Vol 13 (6) ◽  
pp. 3563
Author(s):  
Marianthi Tsakaldimi ◽  
Panagiota Giannaki ◽  
Vladan Ivetić ◽  
Nikoleta Kapsali ◽  
Petros Ganatsas
Keyword(s):  
Tree Species ◽  
Block Design ◽  
Pinus Nigra ◽  
Fertilization Rate ◽  
Early Growth ◽  
Climate Scenarios ◽  
Northern Greece ◽  
Randomized Block Design ◽  
Below Ground ◽  
High Fertilization

Pinus nigra is one of the most widely used tree species for reforestation within its geographical distribution, as well as being a potential substitute for other tree species in Central Europe under future climate scenarios. P. nigra is transplanted into the field as two-year or three-year old seedlings because of its relatively low growth rate in the nursery. This study investigated the effects of fertilization programs and shading on P. nigra seedlings, aiming to accelerate early growth, and thus to reduce the nursery rearing time. The experiment (a completely randomized block design) was conducted in an open-air nursery by sowing seeds from Grevena, Northern Greece, in Quick pots filled with peat and perlite in a 2:1 ratio. The seedlings were subjected to two levels of fertilization—5 and 10 g L−1 NPK (30-10-10)—and two shading levels: 50% and 70%. At the ends of the first and second nursery growing season, we recorded the seedlings’ above- and below-ground morphology and biomass data. The results show that the application of all of the treatments produced seedlings which met the targeted quality standards for outplanting. However, the combination of a high fertilization rate and low shading level resulted in seedlings of a higher morphological quality, which is often considered to be an indicator for a successful seedling establishment in the field.

scholarly journals Heavy Metal Retention by Different Forest Species Used for Restoration of Post-Mining Landscapes, N. Greece

2020 ◽  
Vol 12 (11) ◽  
pp. 4453
Author(s):  
Theano Samara ◽  
Ioannis Spanos ◽  
Panagiotis Platis ◽  
Thomas G. Papachristou
Keyword(s):  
Heavy Metal ◽  
Tree Species ◽  
Habitat Restoration ◽  
Robinia Pseudoacacia ◽  
Mining Area ◽  
Pinus Nigra ◽  
Forest Species ◽  
Northern Greece ◽  
Black Poplar ◽  
Metal Absorption

The main objective of this research was to study heavy metal absorption by the leaves of main forest species which were planted for that purpose at post-lignite mining landscapes in Northern Greece (Ptolemais, Prefecture of Kozani), as well as in a neighboring region (Kato Grammatiko), 30 km far from the mining area. Four species were studied; two conifers (Pinus nigra Arn., Cupressus arizonica Greene) and two broad-leaved (Robinia pseudoacacia L., Populus nigra L.). The four species varied in their leaf morphology (needles, scale-like leaves, blade, compound or simple, with rough or smooth surfaces). Eighty (80) leaf samples were collected, (10 from each tree species at either site). The heavy metal concentrations measured were iron (Fe), copper (Cu), chromium (Cr), nickel (Ni), cadmium (Cd), manganese (Mn), zinc (Zn) and cobalt (Co). Statistically significant differences (p = 0.01) were found between the lignite deposit and control areas and among the studied species. Higher concentrations were measured for the studied species at the lignite deposit. Moreover, no species demonstrated maximum absorption for all metals. The metal absorption pattern by coniferous trees’ leaves at the mining landscape was similar, with highest concentrations observed for iron and lowest for cobalt [iron (Fe) > zinc (Zn) > manganese (Mn) > copper (Cu) > chromium (Cr) > nickel (Ni) > cobalt (Co)]. Both broadleaved species absorbed highest concentrations of iron, but differed in the amount of the remaining metals [black locust: iron (Fe) > manganese (Mn) > zinc (Zn) > copper (Cu) > nickel (Ni) > chromium (Cr); black poplar: iron (Fe) > zinc (Zn) > manganese (Mn) > copper (Cu) > nickel (Ni) > chromium (Cr) > cobalt (Co)]. Cadmium was detected only in black poplar at both sites. In general, black pine was found to absorb the highest concentration of iron (Fe), and black poplar zinc (Zn). We discuss the importance of carefully selecting the appropriate mixture of tree species in order to achieve maximum habitat restoration effect at heavy metal polluted sites.

scholarly journals Feature extraction from geoeye-1 stereo pairs data for forested area

2015 ◽  
Vol XL-7/W3 ◽  
pp. 515-520
Author(s):  
P. Stournara ◽  
C. Georgiadis ◽  
D. Kaimaris ◽  
M. Tsakiri-Strati ◽  
V. Tsioukas
Keyword(s):  
Feature Extraction ◽  
Pinus Nigra ◽  
Forest Tree ◽  
Evaluation Procedure ◽  
Surface Model ◽  
Stereo Pair ◽  
Northern Greece ◽  
Pass Filter ◽  
Forested Area ◽  
Tasseled Cap Transformation

Remote sensing facilitates the extraction of information for earth’s surface through its capability of acquiring images covering large areas and the availability of commercial software for their processing. The aim of this study is the feature extraction from three Geoeye-1 stereo pairs for forested area. The study area is located in central mountainous forested peninsula of Chalkidiki, in northern Greece. Dominant forest tree species of the site are oak (<i>Quercus conferta</i>), beech (<i>Fagus moesiaca</i>), black pine (<i>Pinus nigra</i>) and calabrian pine (<i>Pinus brutia</i>). Very High Resolution (VHR) Geoeye-1 stereo pair satellite images were utilized in panchromatic and multispectral mode. The panchromatic mode was employed for Digital Surface Model (DSM) generation and its evaluation. In this study the High Pass Filter (HPF) data fusion technique was applied between panchromatic and multispectral mode for acquiring a new image with the benefits of both contracting images. Because of the fact that the feature extraction was attempted in a forested region, NDVI index and Tasseled Cap transformation were applied in the fused images’ evaluation procedure. Optical assessment was also applied. The accuracy of the generated DSM and the evaluation results of the fused images were remarkable.

scholarly journals Dothistroma septosporum Identified in Greece on Pinus brutia and Pinus nigra Plantations

Plant Disease ◽  
2013 ◽  
Vol 97 (9) ◽  
pp. 1247-1247 ◽  
Author(s):  
P. Tsopelas ◽  
I. Barnes ◽  
N. Soulioti ◽  
M. J. Wingfield
Keyword(s):  
Its Region ◽  
Pinus Nigra ◽  
The United States ◽  
Malt Extract ◽  
Mating Types ◽  
Fruiting Bodies ◽  
Northern Greece ◽  
Worldwide Distribution ◽  
Old Trees ◽  
Dothistroma Septosporum

Dothistroma needle blight (DNB) is caused by two ascomycete fungi, Dothistroma septosporum with a worldwide distribution and D. pini found in the United States, Russia, Ukraine, Hungary, and France (1). DNB has been known in Greece since the early 1980s (3) and the species responsible for the disease was reported as D. pini. In December 2011, needles were collected from three trees in Lagada, Thessaloniki regional unit of Central Macedonia (northern Greece), where the disease was first recorded. DNB infection seems to be limited to a valley in this area in Pinus nigra and P. brutia plantations established more than 50 years ago in an originally deciduous oak forest. Infections were observed over an area of 50 to 60 ha of pine plantations. Although the majority of pine trees were infected by the pathogen, the severity of the disease was relatively low and mortality of infected trees was not observed. Infections were limited to the lower branches in the 50-year-old trees, while on a limited number of younger trees of P. brutia (10 to 15 years old), infection was more severe, extending to the entire crowns of the trees. DNB does not appear to be very common in Greece. Infected needles had reddish-brown bands, usually with necrotic tips or entirely necrotic needles. Black sub-epidermal fruiting bodies (acervuli) were observed with the needle epidermis split and raised. Isolations were made from fruiting structures on needles of P. nigra and P. brutia (50-year-old trees) and P. brutia (10-year-old trees) after surface disinfection with 70% ethanol. Conidia from single fruiting bodies were transferred onto 3% malt extract agar (MEA) in petri dishes and incubated at 20°C. Colonies on MEA had a radial growth rate of 1.3 to 1.6 mm per week, were crustose, brown to grey-brown, and partly covered with slimy masses of conidia. The agar surrounding the colonies had a reddish color. Conidia from acervuli on the needles and the cultures were similar in shape and size, filiform, hyaline, 2 to 4 septate, and 1.8 to 2.5 (3.3) × 22 to 47 μm long. DNA was extracted from three cultures: one from P. nigra (CMW 37966) and two from P. brutia (CMW 37965, CMW 37967) using a standard phenol/chloroform method. The internal transcribed spacer (ITS) region was amplified and sequenced (1). Sequences were 100% identical to D. septosporum isolates in GenBank (e.g., AY808291). In addition, up to 12 randomly selected acervuli were excised directly from the needles of each of the three trees and DNA was extracted using PrepMan solution (Applied Biosystems). The mating types of these samples were determined using species-specific mating type primers for D. pini and D. septosporum (2). All acervuli were confirmed to be those of D. septosporum. Both mating types were found on needles from P. brutia and P. nigra. However, the teleomorph of D. septosporum was not detected on infected needles. References: (1) I. Barnes et al. For. Pathol. 41:361, 2011. (2) M. Groenewald et al. Phytopathology 97:825, 2007. (3) D. S. Kailidis and S. Markalas. Dasika Chronika 24:257, 1981 (in Greek).

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