نتایج جستجو برای: oak trees decline

تعداد نتایج: 187710  

Journal: :رستنیها 0
مژگان روغنیان دانش آموخته کارشناسی ارشد، دانشگاه کردستان، صندوق پستی 416، سنندج جهانشیر امینی استادیار گروه گیاه پزشکی دانشگاه کردستان، صندوق پستی 416، سنندج ([email protected]) دوستمراد ظفری دانشیار گروه گیاه پزشکی دانشگاه بوعلی سینا، همدان جعفر عبداله زاده استادیار گروه گیاه پزشکی دانشگاه کردستان، صندوق پستی 416، سنندج

quercus persica and pistacia mutica are two known and prevalent forest trees of baneh and marivan from kurdistan province (w iran). thirty-five fungal isolates were obtained from 50 bark samples of q. persica collected in sept. and mar. 2010–11. the aim of this study was to identify fungi associated with oak trees of kurdistan province. based on morphological features and authentic keys (ellis ...

Journal: :Radiocarbon 2022

ABSTRACT The Podemszczyzna peatland (Sandomierz Basin, SE Poland) is a place of peat exploitation for balneological purposes. thickness organic sediments (minerogenic peat) reaches 4.0 m, while the beginning accumulation was dated using radiocarbon method ( 14 C) at 13,517–13,156 cal BP. During numerous fragments subfossil wood (of various species) were excavated and, based on dendrochronologic...

2001
Nina Maggi Kelly

The Sudden Oak Death (SOD) epidemic in California is alarming for those living with, and adjacent to, the complex of oak and tanoak woodland that exist in patches along the coast. Monitoring SOD occurrence and spread is an on-going necessity. Remote sensing methods have proved to be successful in mapping and monitoring forest health and distribution when a sufficiently small ground resolution i...

2003
Brice A. McPherson David L. Wood Andrew J. Storer N. Maggi Kelly Richard B. Standiford

A forest disease caused by a newly described pathogen, Phytophthora ramorum, is presently affecting a number of woody plant species in central and northern coastal California and southern Oregon, U.S.A. Among the most severely affected tree species are coast live oak, Quercus agrifolia, and tanoak, Lithocarpus densiflorus. In March 2000, we established plots in Marin County, CA, to assess sympt...

2007
Ruiliang Pu Peng Gong

A Compact Airborne Spectrographic Imager-2 (CASI) dataset was used for detecting mortality and vegetation stress associated with a new forest disease. We first developed a multilevel classification scheme to improve classification accuracy. Then, the CASI raw data were transformed to reflectance and corrected for topography, and a principal component (PC) transformation of all 48 bands and the ...

Journal: :Forests 2022

Cork oak decline in Mediterranean forests is a complex phenomenon, observed with remarkable frequency the southern part of Iberian Peninsula, causing weakening and death these woody plants. The defoliation canopy, presence dry peripheral branches, exudations on trunk are visible symptoms used for prognosis decline, complemented by Phytophthora cinnamomi identified rhizosphere trees adjacent soi...

2007
Joaquín Castañeda

With the reemerging discussion of gentrification in the urban landscape, an exploratory case study of the Oak Park Redevelopment Plan in Sacramento, California, was conducted to better understand the community’s gentrifying characteristics and the implications once the redevelopment goals are met. In addition, a conceptual framework (CF) was formulated in order to examine the components and pro...

Journal: :Tree physiology 2008
Songlin Fei Kim C Steiner

Relationships between advance regeneration of four tree species (red maple (Acer rubrum L.), white oak (Quercus alba L.), chestnut oak (Q. montana Willd.) and northern red oak (Q. rubra L.)) and biotic (non-tree vegetation and canopy composition) and abiotic (soil series and topographic variables) factors were investigated in 52, mature mixed-oak stands in the central Appalachians. Aggregate he...

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