Linking the ecology of natural oak regeneration to silviculture

Larsen, David R.; Johnson, Paul

doi:10.1016/s0378-1127(97)00233-8

Cited by 122 publications

(94 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The present form of ancient coppices was shaped by the mortality of new shoots due to mutual competition, the ageing and dying of old stools (Larsen & Johnson 1998, Rydberg 2000, as well as by natural habitat conditions and the length, intensity and frequency of human impact. The probability of sprouting steeply declines for stools with large DBH.…”

Section: Tree Inner Zone Of Influencementioning

confidence: 99%

Below- and above-ground biomass, structure and patterns in ancient lowland coppices

Vrška¹,

Janík²,

Pálková³

et al. 2017

iForest

View full text Add to dashboard Cite

Ancient coppice woods are areas that reflect long-term human influence and contain high species biodiversity. In this type of forest we aimed to: (i) analyze the below-and above ground biomass of stools and estimate the age of largest stool; (ii) define a "zone of interference" for coppices; (iii) describe and classify variability in the shape and size of coppice stools; (iv) define the specific characteristics of the spatial distribution of stems and stools. The study was conducted in the Podyjí National Park, Czech Republic, where two old oak coppice stands were fully stem mapped: Lipina (3.90 ha) and Šobes (2.37 ha). Cores were processed using TimeTable and PAST4. Below-and above-ground biomass of the largest stools was computed using the data from terrestrial laser scanner. Tree zones of influence were analyzed with V-Late landscape analysis tools using Shape Index for singles and 0.87 m 2 for stools. The Matérn cluster process was successfully fitted to our empirical data. In this model, the mean cluster radius ranged between 1.9 to 2.1 m and mean number of points per cluster was 1.7 and 1.9. The most prevalent characteristics of these ancient oak coppices were their compact shape and clustered spatial distribution up to 10 m.

show abstract

Section: Tree Inner Zone Of Influencementioning

confidence: 99%

Below- and above-ground biomass, structure and patterns in ancient lowland coppices

Vrška¹,

Janík²,

Pálková³

et al. 2017

iForest

View full text Add to dashboard Cite

show abstract

“…Mortality of cork oak germinants in open areas can reach up to 90 to 100% due to the joint effect of rodents seed predation and summer drought [54]; but once the first growing season is overcome, seedlings are able to persist for 2 to 4 years and live in a suppressed state, through the dieback of the shoot during the droughty summers, followed by resprouting in the fall. The result is a recruitment of seedlings of variable age, not more than 30 cm high, with a deep root system, that in most cases are not able to perform adequately, as long as favourable conditions for growth do not occur [29,54]. Thus, although mature cork oak is a shade-intolerant evergreen species, which shows a water-saver strategy under water stress [14,34,45], some canopy protection during the seedling state favours its establishment and early growth.…”

Section: Introductionmentioning

confidence: 99%

Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought

Pardos¹,

Clavijo²,

Aranda³

et al. 2005

Ann. For. Sci.

View full text Add to dashboard Cite

-The interactive effects of light and drought on water relations and soluble sugars were addressed on Quercus suber L. seedlings grown under the combination of four irradiances and two soil water contents. Leaf water potentials at predawn and midday were lower for water stressed seedlings, independently of light environment. Osmotic potentials at full (Ψπ 100 ) and zero turgor (Ψπ 0 ) decreased with drought, under the four light treatments. However, the decline was greater with the development of water stress under the two treatments of higher light availability. The higher soluble sugar concentrations in seedlings grown under higher irradiances provoked a decrease of Ψπ 0. The decrease in Ψπ 100 and Ψπ 0 in moderate stressed seedlings was accompanied by an increase in ε max . The lower ability for osmotic adjustment in seedlings grown under moderate water stress and low light environment suggested a lower efficiency in developing physiological mechanisms for drought tolerance in shade-grown seedlings.cork oak / drought / light / osmotic adjustment / soluble sugars Résumé -Relations hydriques des semis de chêne-liège (Quercus suber L.) en réponse à l'ombre et à une sécheresse modérée. Les effets interactifs de la lumière et de la sécheresse sur les relations hydriques et les sucres solubles ont été étudiés sur des plantules de Quercus suber L. qui ont poussé sous la combinaison de quatre éclairements différents et de deux contenus en eau du sol. Les potentiels hydriques foliaires mesurés l'un avant l'aube et l'autre à midi étaient plus bas pour les plantules subissant un stress hydrique indépendamment du niveau d'éclairement. La pression osmotique à pleine turgescence (Ψπ 100 ) et la pression osmotique à turgescence nulle (Ψπ 0 ) ont diminué avec la sécheresse sous les quatre éclairements. Cependant, les diminutions étaient plus grandes pour les plantules soumises à un stress hydrique et à un éclairement élevé. La plus grande concentration de sucres solubles des plantules ayant poussé sous un plus grand éclairement a provoqué la diminution de Ψπ 0 . La diminution de Ψπ 100 et de Ψπ 0 pour les plantules ayant poussé sous une sécheresse modérée a été accompagnée d'une augmentation de ε max . La moindre capacité pour l'ajustement osmotique des plantules ayant poussé sous un stress hydrique modéré et une faible intensité lumineuse a montré une plus faible efficacité pour le développement des mécanismes physiologiques de tolérance à la sécheresse de ces plantules ayant poussé à l'ombre.chêne-liège / sécheresse / lumière / ajustement osmotique / sucres solubles

show abstract

“…La popolazione di semenzali, sembra quindi formata da semenzali che sopravvivono per diversi anni, subendo (anche ripetutamente e periodicamente) la morte della parte aerea e ricacciando dal colletto grazie alla grande quantità di gemme dormienti presenti (Ciampi et al 1977, Larsen & Johnson 1998, cosa che determina la formazione di un apparato radicale molto sviluppato.…”

Section: Discussioneunclassified

“…La popolazione di semenzali che non ha mai subito la morte della parte aerea e che non ha ricacciato (true seedlings) o costituita da microceppaie (seedling sprouts), definita globalmente come seedling bank da Grime (1979), sembra quindi formata da semenzali che sopravvivono per diversi anni, subendo (anche ripetutamente e periodicamente) la morte della parte aerea e ricacciando dal colletto grazie alla grande quantità di gemme dormienti presenti (Ciampi et al 1977, Larsen & Johnson 1998.…”

Section: Esame Dendrocronologico Del Campione DI Semenzaliunclassified

Analysis of the seed regeneration process in a

Giovannini¹

2012

Forest@

View full text Add to dashboard Cite

IntroduzioneLe norme tecniche e legislative che regolano le modalità di utilizzazione dei boschi cedui hanno subito, negli ultimi anni, numerose modifiche, che rispondono soprattutto alla esigenza di adeguare, per quanto possibile, questa tradizionale forma di uso del suolo a nuove istanze, emerse negli ultimi decenni, relative alla mitigazione di alcuni effetti ritenuti negativi dal punto di vista paesaggistico e idrogeologico ed alla tutela della biodiversità. Le modifiche recepite da gran parte delle legislazioni regionali, hanno interessato, in particolare, il campo di variazione di età in cui è ammesso il taglio di ceduazione (compreso tra il turno "minimo" e l'età alla quale il ceduo è considerato in fase di avviamento all'alto fusto), la dimensione e la contiguità delle tagliate, la matricinatura.Per quest'ultimo aspetto la discussione si è concen- it).Abstract: Analysis of the seed regeneration process in a Quercus pubescens Willd. coppice in the province of Florence over twenty years after cutting. The technical standards and regulations ruling coppicing procedures have been changed in recent years, and they mainly focused on the minimal rotation age of the coppice woodland, on the size and contiguity of area to be coppiced, and on the standard trees. For the latter, the discussion concerned almost exclusively the number, characteristics and spatial distribution of standards whereas the traditionally reported role played by them in term of future gamic regeneration process, as well as the characteristics and dynamics of the long term process itself, is far to be studied and clarified. The objective of this work, carried out in a Quercus pubescens coppice woodland in the province of Florence, Central Italy, is to analyze the dynamics of the population of seedlings since the time of felling in 1980 over the next 20 years. This work examined changes in number of seedlings, the age of seedlings, the development of agamic regeneration. Main results: (a) in about 20 years since felling any of the survived seedling grew to sapling; (b) mortality rate of seedlings was initially very high, gradually decreasing over the years; (c) spatial distribution varies in space and time, and is related to the presence either absence of the standard trees; (d) over the years, there was a severe selection among the coppice stumps and among the coppice shoots, some of which die, without however be replaced by seed-born trees. It emerged the marginal role of the populations of seedlings, both in terms of replacement of died stumps, and in recruitment of the new standards ("allievi"). This conclusion calls into question the term "natural regeneration" by which even in technical either scientific terminology about coppice woodlands often refers to a set of seedlings present, which is theoretically assigned a role that definitively they cannot really play. Keywords: Coppice, Quercus pubescens, Standard trees, Seed regeneration, CompetitionReceived: Nov 30, 2011; Accepted: Feb 10, 2012; Published online: Feb 28, 2012 Citation: ...

show abstract

Linking the ecology of natural oak regeneration to silviculture

Cited by 122 publications

References 11 publications

Below- and above-ground biomass, structure and patterns in ancient lowland coppices

Below- and above-ground biomass, structure and patterns in ancient lowland coppices

Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought

Analysis of the seed regeneration process in a

Contact Info

Product

Resources

About