|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Dead standing pine trees in a boreal forest landscape in the Kalevala National Park,northern Fennoscandia: amount,population characteristics and spatial pattern显示文摘Background: After their death, Scots pine trees can remain standing for decades and sometimes up to 200 years,forming long-lasting and ecologically important structures in boreal forest landscapes. Standing dead pines decay very slowly and with time develop into ‘kelo' trees, which are characterized by hard wood with silvery-colored appearance. These kelo trees represent an ecologically important, long lasting and visually striking element of the structure of natural pine-dominated forests in boreal Fennoscandia that is nowadays virtually absent from managed forest landscapes.Methods: We examined and mapped the amount, structural features, site characteristics and spatial distribution of dead standing pine trees over a ten hectare area in an unmanaged boreal forest landscape in the Kalevala National Park in Russian Viena Karelia.Results: The mean basal area of dead standing pine trees in the forested part of the landscape was 1.7 m^2?ha^(-1) and the estimated volume 12.7 m^3?ha^(-1). From the total number of standing dead pine trees 65% were kelo trees, with a basal area of 1.1 m^2?ha^(-1) and volume of 8.0 m^3?ha^(-1), the remainder consisting of standing dead pines along the continuum between a recently dead tree and a kelo tree. Overall, standing dead pines were distributed throughout the study area, but there was a tendency towards spatial clustering up to <100 m distances. Standing dead pines were most commonly situated on flat ground or in the mid slope in the local topography.In addition, standing dead pines contributed to substrate diversity also by commonly having charred wood and broken tops. Based on the presence of dead pine snags in different stage of transition from a recently dead pine to a kelo with silvery surface, it seems evident that the process of kelo recruitment was continuously in action in the studied landscape.Conclusions: Kelo trees are an omnipresent feature in natural pine-dominated forest landscapes with important contribution to forest structural and substrate diversity. Because of their longevity and extremely slow turnover dynamics and importance for biodiversity, protection of vulnerable kelo tree populations, and ensuring their continuous recruitment, should be of high priority in forest restoration and sustainable management. | Timo Kuuluvainen Tuomas Aakala Gergely Várkonyi | 2017 | Forest Ecosystems2017，4，3： | 2 |
| 2 | Comparison of stroke features and disability in daily life patients with ischemic stroke aged 55 to 70 and 71 to 85 years 显示文摘 | Tarja P Timo E Risto V | 1997 | Stroke1997，28，4： | 1 |
| 3 | Facile entry to the tetracyclic 5-7-6-3 tigliane ring system显示文摘 | Timo V Ovaska Sarah E Reisman Meghan A Flynn | 2001 | Org Lett2001，3，1： | 1 |
| 4 | Clonal differences in growth and phenolics of willows exposed to elevated ultraviolet-B radiation显示文摘 | RIITTA T TIMO V PEDRO J A et ai | 2003 | Basic Appl Ecol2003，4，3： | 1 |
| 5 | 5-HT3 Receptor antagonists in the prophylaxis of acute vomiting induced by moderately emetogenic chemotherapy a randomised study显示文摘 | Timo J Vesa V | 1993 | Eur J Cancer1993，29，12： | 1 |
| 6 | Effects of temperature and oxygenavailability on greenhouse gas and nutrient dynamics in sediment of a eutrophic mid-boreal lake显示文摘 | Anu Liikanen Timo Murtoniemi Heikki Tanskanen Tero V?is?nen Pertti J. Martikainen | 2002 | Biogeochemistry2002，，3： | 1 |
| 7 | Functional and structual regression of the rabbit corpus luteum is associated with altered luteal immune cell phenotypes and cytokine expression patterns 显示文摘 | Claudia A K Timo D V Andreas H | 2002 | Histochemistry and Cell Biology2002，118，6： | 1 |
| 8 | State-Space Optimization of ETL Workflows显示文摘 | Alkis S Panos V Timos S | 2005 | IEEE Transactions on Knowledge & Data Engineering2005，17，10： | 1 |
| 9 | Mod- elling Weak Disposability in Data Envelopment Analy- sis: Under Relaxed Convexity Assumptions 显示文摘 | Victor V Podinovski Timo Kuosmanen | 2011 | Euro- pean Journal of Operational Research2011，，211： | 1 |
| 10 | Rotavirus disease in Finnish children:use of numerical scores for clinical severity of diarroeal episodes显示文摘 | Timo V | 1990 | Scand J Infect Dis1990，22，3： | 1 |
| 11 | Urban biodiversity in local newspapers: a historical perspective显示文摘 | TIMO V RAUNO L HANNU L | 2001 | Biodiversity and Conservation2001，10，： | 1 |
| 12 | Numerical Taylor expansions for invariant manifolds 显示文摘 | Timo E Jan V P | 2004 | NumerischeMathematik2004，99，1： | 1 |
| 13 | Cerebral perfusion heterogeneity and complexity in patients with acute subarachnoid hemorrhage显示文摘 | Timo M Timo K Esko V | 2006 | Nuclear Medicine Communications2006，27，2： | 1 |
| 14 | Vascular cognitive impairment显示文摘 | John T O’Brien Timo Erkinjuntti Barry Reisberg Gustavo Roman Tohru Sawada Leonardo Pantoni John V Bowler Clive Ballard Charles DeCarli Philip B Gorelick Kenneth Rockwood Alistair Burns Serge Gauthier Steven T DeKosky | 2003 | Lancet Neurology2003，，2： | 1 |
| 15 | Compact damping models for laterally moving microstructures with gas-rarefaction effects 显示文摘 | Timo V Marek T | 2001 | IEEE Journal of MEMS2001，10，2： | 1 |
| 16 | The adrenergic a2-reeeptor and sexual incentive motivation in male rats 显示文摘 | Timo V Antti H Anders A | 2006 | Pharmaeol Bioehem Behav2006，83，3： | 1 |
| 17 | Splitting the unit delay-tools for fractional delay filter design 显示文摘 | TIMO I L VESA V MATTI K | 1996 | IEEE Signal Processing Magazine1996，13，1： | 1 |
| 18 | Immunogenicity and safety of live oral attenuated bovine rotavirus vaccine strain RIT 4237 in adults and young children 显示文摘 | Timo V Erika I Andree D | 1983 | The lancet1983，8，： | 1 |
| 19 | A Comparison of Construction Contract Prices for Traditionally Procured Roads and Public-Private Partnerships显示文摘 | Frédéric Blanc-Brude Hugh Goldsmith Timo V?lil | | 0，，1： | 1 |
| 20 | The effect of changes in the consumption of macrolide antibiotics on erythromycin resistance in group Astrep tococci in Finfand显示文摘 | Helena S Timo K Jaana V | 1997 | N Engl J Med1997，337，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员