Patrick Pyttel- Dr. rer. nat.; Dipl.-Forstwirt
- Project coordinator at Bodensee-Stiftung
Patrick Pyttel
- Dr. rer. nat.; Dipl.-Forstwirt
- Project coordinator at Bodensee-Stiftung
About
69
Publications
36,303
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Introduction
I am interested in applied research projects involving forest managers and governmental authorities, in order to derive silvicultural recommendations and to improve the use of forest resources in Central Europe.
Current institution
Bodensee-Stiftung
Current position
- Project coordinator
Additional affiliations
August 2008 - December 2011
Publications
Publications (69)
Insect-Responsible Sourcing Regions: Harmonising food production and biodiversity conservation
LIFE Insect-Responsible Sourcing Regions aims to further disseminate proven measures for the promotion of pollinating insects in agriculture and resolutely break new ground: a positive ecological impact is no longer limited to the individual farm. Landsca...
Baummikrohabitate (BMH) sind biodiversitätsfördernde Strukturelemente an Einzelbäumen und haben eine wichtige Funktion für den Artenschutz. Zu den BMH zählen bspw. Specht-und Faulhöhlen, Kronentotholz und epiphytischer Bewuchs. Durch technisierte und ertragsorientierte Waldbewirtschaftungsformen liegen Quantität und Qualität von BMH in Wäldern in d...
The individual or grouped retention of habitat trees in managed multiple-use forests has become an approach used to protect biodiversity-related structural attributes typically found in old close-to-nature forests. This study focuses on the effect of one such retention approach in the managed forests of Baden-Württemberg, Germany, ten years after i...
We report on a structural complexity enhancement (SCE) experiment that was designed to test ecological restoration measures in the Black Forest National Park, Germany. The main goal was to understand as to whether the creation of standing and downed deadwood within previously managed, single-layered Norway spruce (Picea abies L.) forests accelerate...
Key message
This literature review identified the main factors for the success of different silvicultural approaches to regenerate sessile oak naturally and unveiled at the same time important knowledge gaps. Most previous studies were only short-term and restricted to a few factors and single locations. Hence, the findings of these studies are of...
Key message
This study showed that regeneration success (presence of oaks ≥ 150 cm in total height) in artificial canopy openings of a mature mixed sessile oak stand was mainly driven by initial oak seedling density.
ContextSmall-scale harvesting methods as practiced in close-to-nature forestry may disadvantage the regeneration of more light-demand...
In addition to social and economic benefits, urban trees provide habitats for many different species and contribute significantly to urban biodiversity. To prevent harm to humans or infrastructure, tree risk assessment is conducted regularly in urban areas. Resultant pruning activities are often criticized as leading to unnecessary injuries and art...
Small-scale harvesting methods as practised in close-to-nature forestry may disadvantage the regeneration of more light-demanding tree species such as most oaks and thus cause regeneration failure. Conducted in south-western Germany, this study examined photosynthetic performance and height growth of naturally regenerated 7-year-old sessile oak (Qu...
Retention forestry, which retains a portion of the original stand at the time of harvesting to maintain continuity of structural and compositional diversity, has been originally developed to mitigate the impacts of clear‐cutting. Retention of habitat trees and deadwood has since become common practice also in continuous‐cover forests of Central Eur...
Retention forestry implies that biological legacies like dead and living trees are deliberately selected and retained beyond harvesting cycles to benefit biodiversity and ecosystem functioning. This model has been applied for several decades in even-aged, clearcutting (CC) systems but less so in uneven-aged, continuous-cover forestry (CCF). We prov...
Baummikrohabitate stellen wichtige Indikatoren für die Waldbiodiversität dar. Durch integrative Naturschutzmaßnahmen – wie das Ausweisen von Habitatbäumen – können biodiversitätsrelevante Strukturen im bewirtschafteten Wald langfristig bereitgestellt werden. Bislang wurde mit Hilfe von Baummerkmalen die Anzahl von Mikrohabitaten auf Baum- oder Best...
Key message
Continuously suppressed S.torminalis trees were found to be highly sensitive to release cuttings. After release diameter growth increased drastically, the crown redensified from the inside and seeds were produced during the first growing season.
Abstract
Sorbustorminalis is valued for its timber characteristics and ecological role in c...
Baummikrohabitate sind für die Auswahl von Habitatbäumen ein wesentliches Entscheidungskriterium. Darüber hinaus sind Anzahl und Vielfalt von Baummikrohabitaten eine Möglichkeit, um die naturschutzfachliche Wertigkeit von Waldbeständen darzustellen. Diese Fallstudie zeigt, inwiefern sich die Häufi gkeit und Vielfalt von Baummikrohabitaten in Bergmi...
Die Traubeneiche gilt im Kontext des globalen Klimawandels als Baumart der Zukunft. Ihre natürliche Verjüngung ist jedoch mit waldbaulichen Schwierigkeiten verbunden. Die Haupteinfl ussfaktoren für eine erfolgreiche Verjüngung sind Licht, Konkurrenz, Verbiss und Pflege. Durch die Abkehr von traditionellen Verjüngungsverfahren wie dem
Großschirmschl...
Habitat trees provide microhabitats for many forest-related species, and thus habitat-tree retention is one of the main measures to integrate nature conservation objectives into forests managed for wood production. By setting aside habitat trees, forest managers have to solve a crucial tradeoff between economic and environmental benefits. Therefore...
The continued provision of old-growth elements in forest landscapes is a critical factor for biodiversity conservation in Central Europe. A well-established method for predicting the potential of forests to maintain biodiversity is to quantify tree-related microhabitat structures (TreMs). Our aim was to predict the TreM abundance and diversity for...
Tree-related microhabitats are an important determinant of forest biodiversity. Habitat trees, which typically provide many microhabitats such as hollows, crown dead wood, etc., are therefore selected to maintain those structural attributes within managed forests. To what extent the occurrence of microhabitats on potential habitat trees may be pred...
Marteloscopes are multifunctional training tools that can create a better understanding of forest management and have been developed as didactic tools for virtual tree selections. With this paper the authors provide explanatory information on the more than 40 Marteloscopes that were established in the course of the project Integrate+. It presents t...
Vorgestellt wird das Lehr-/Lernkonzept sog. „Marteloskope“. Zwei der bisher europaweit 40 Marteloskope befi nden sich im Stadtwald Freiburg. Diese werden im Rahmen der waldbaulichen Ausbildung an der Universität Freiburg eingesetzt. Veranschaulicht wird, was Marteloskope sind, wie sie funktionieren, welche Möglichkeiten sie in der forstlichen Aus-...
‘Tree – tree’ interactions are important structuring mechanisms for forest community dynamics. Forest management takes advantage of competition effects on tree growth by removing or retaining trees to achieve management goals. Both competition and silviculture have thus a strong effect on density and distribution of Tree related Microhabitats (TreM...
Silvicultural approaches for mixed-species stands typically aim at creating and maintaining stand compositional and structural diversity to provide the desired ecosystem function. An important aim of regeneration and tending is to develop stable mixtures that facilitate the anticipated interactions among the participating tree species and at the sa...
Summary: Orchard meadows are ecological important habitats within our cultural landscape. They are a key element for protection of biodiversity. Through their structural diversity they provide habitats for many endangered species. We applied a method of assessing key structures used in forestry was on an orchard meadow to gain knowledge about quant...
L’Alisier torminal [Sorbus torminalis L. (Crantz)] quoique rare est relativement présent dans les taillis de chênes d’Europe centrale. Les connaissances sur sa régénération et sa croissance sont peu nombreuses malgré un bois de haute valeur. Le taillis étant actuellement en forte régression, des interrogations se posent vis-à-vis de la persistance...
This chapter aims to provide a general introduction to important forest management concepts. Modern forest management originated historically from situations, where forests needed to be restored following periods of clearing and degradation for industrial and agricultural use. Hence the initial focus was on the supply of wood following a production...
Although the wild service tree [Sorbus torminalis L. Crantz] is generally rare, it is fairly common in the oak coppices of central Europe. There is little knowledge about its regeneration and growth in spite of the high value of the wood. Since coppicing is less and less popular, questions arise as to the survival of S. torminalis populations by wa...
Im November 2012 besuchten neun Nachwuchswissenschaftler der Albert-
Ludwig-Universität Freiburg Chile, um Eindrücke von Wäldern und
Forstwirtschaft am „anderen Ende der Welt“ zu sammeln. Die Bildungsreise
wurde von der Professur für Waldbau geleitet und in Kombination
mit Vorträgen und Postern auf der IUFRO Konferenz zur „Erhaltung
der menschliche...
Sorbus torminalis L. (Crantz) is a rare species
in Central European forests with very limited quantitative
information on its regeneration and growth dynamics.
Since coppicing is no longer practiced in the most parts of
Central Europe, it is unclear whether S. torminalis, which
has usually a shorter end height than companion species,
can persist in...
The abandonment of coppice forests is thought to be the major reason for the rare occurrence of Sorbus torminalis in Central Europe. To support management and conservation efforts, we examined the dynamics and growth of S. torminalis regeneration before and after coppicing. The study was carried out in aged oak coppice forests stands in south-west...
Initial growing space is of critical importance to growth and quality development of individual trees. Here we investigated how mortality, growth (diameter at breast height, total height), natural pruning (height to first dead and first live branch and branchiness) and stem and crown form of 24-year-old pedunculate oak (Quercus robur [L.]) and Euro...
In Central Europe, traditional management of oak coppice forest was abandoned at the beginning of the last century, leaving large tracts of forest developing into aged coppice stands. Since the increasing importance and use of biomass as a renewable energy source, resumption of coppice management in these forests is being considered. However, there...
In Central Europe, traditional management of oak coppice forest was abandoned at the beginning of the last century, leaving large tracts of forest developing into aged coppice stands. Recently renewed interest in coppicing has developed in many European countries because of the increasing importance of fuel wood as a substitute for fossil fuels and...
Norway spruce (Picea abies), at one time the most economically important tree species in Germany and other parts of central Europe, has recently been declining in area covered. The decline is not only due to climate change risks but also because of close‐to‐nature forest management practices whereby pure, even aged coniferous stands are converted i...
Over-aged coppice forests (older than 40 years) occur all over Europe as a result of the abandonment of traditional harvesting practices during the last 60-100 years. With the increasing demand for bioenergy, there is renewed interest in coppicing, which typically aims at maximizing biomass production. For the sustainable management of these forest...
Einleitung Die rheinland-pfälzischen Stockausschlagwälder befinden sich nach Angaben der Forsteinrichtungswerke überwiegend in einem Alter zwischen 80 und 90 Jahren und somit in einem für diese Betriebs-art untypisch späten und deshalb für die Verjüngung aus dem Stock möglicherweise kritischen Stadium. Aufgrund der Ungewissheit des Verjüngungserfol...
Waldwachstum Angetrieben durch die Diskussion um den Ausbau der Nutzung erneuerbarer Energien [6, 2], durch die zunehmende Konkurrenz zwischen energetischer und stoffl icher Holznutzung und durch die stei-gende Nachfrage, vor allem durch den pri-vaten Hausbrand (siehe z.B. [14, 19]), ist in Zukunft mit einer steigenden Nachfra ge an Holz aus Nieder...
Coppice is a traditional forest management system used all over the world. It takes advantage of fast early growth and the vegetative reproduction of the respective trees. Coppice forests provide firewood and many other products and services, especially to rural communities. In Central Europe, regular periodic cutting and management of coppice fore...
Die Elsbeere (Sorbus terminalis) gehört wie Vogelkirsche, Vogelbeere, Speierling, Mehlbeere, Wildbirne und Wildapfel zu den Wildobsthölzern. Diese Rosenge-wächse (Rosaceae) liefern ausnahmslos wertvolle und vielseitig einsetzbare Nutz-hölzer und zählen zu den Edellaubholzar-ten [3]. Aufgrund des geringen Angebotes auf dem Markt und dem dadurch geri...
variance of light intensity in stands. In mountainous areas, however, the adequate gap mosaic pattern for the growth of regenera-tions will be altered by the topography. Combining a digital elevation model to the model will provide a basis of silviculture for complex structured stands in complex topography. Japanese beech (Fagus crenata), which dom...
growth in 1960s. Quercus acutissima forests have been clear-cut in 15–20 year cycles for bed logs for Shiitake mushrooms. Clear-cutting is the most signifi cant disturbance in forest management and is supposed to have a role to maintain herbaceous species diversity. To clarify the role of clear-cutting in the maintenance of plant diversity, we comp...
Anticipated future climate changes are expected to significantly influence forest ecosystems, particularly in treeline ecotones. Climate change will have both direct and indirect effects on the future distribution of alpine tree species, some of which will be positive and others negative. Although increased temperatures are on the whole likely to h...
Desde hace unas décadas en Europa ha surgido una nueva filosofía silvícola llamada “Silvicultura cercana a lo Natural”, como respuesta a los graves problemas ambientales existentes y al alto grado de desarrollo forestal de los países europeos. En Noviembre del año 2009, se realizó una salida a terreno al estado federal de Hessen en Alemania central...
The effect of planting density on branch development was examined in 4-year-old Eucalyptus pilularis Sm. and Eucalyptus cloeziana F. Muell. plantations located near the coast of north-eastern NSW. Branch diameter, angle and status (live or dead) were measured along the entire stem of trees established at 1250, 1667 and 3333 stems per hectare (sph)....
Questions
Question (1)
The European Environment Agency describes the pollution through nitrogen as one of the main direct causes for habitat and subsequently biodiversity loss. Many studies already showed that also chronic low level nitrogen deposition significantly reduce plant species numbers. My question to the scientific community is: Are there ways of forest management or silvicultural measures to a) reduce atmospheric nitrogen deposition and b) to reduce nitrogen pools in temperate forest ecosystems? Is there a study discussing at least ideas of how to combine soil nutrient sustainability aspects with de-eutrophication measures in temperate forests?
