Hans Pretzsch Livres

This textbook provides a comprehensive overview of the ecology and management of diverse forests, focusing on key questions related to mixed-species stands. It explores scientific concepts for assessing growth, dynamics, and functioning of these forests, examining their generalizability and necessary experimental developments. The text compares mixed-species stands with monocultures regarding productivity, wood quality, and ecological stability under stress and disturbances. It investigates how species mixtures affect ecosystem functioning, influenced by species composition, site conditions, and stand structure. Additionally, it delves into the mechanisms behind over- or underyielding at the forest-stand level, linking tree and organ-level interactions. The book emphasizes integrating current scientific understanding of mixed-species forests into silvicultural practices and forest management planning. It also considers whether the ecological traits of mixed-species stands lead to economic differences compared to monocultures. Furthermore, the text discusses experimental designs and analytical methods for studying mixed-species forests, offering extensive empirical data, general concepts, models, and management strategies. This resource is valuable for students, scientists, educators, and professionals in forest planning and management.

The aim of this book is to improve the understanding of forest dynamics and the sustainable management of forest ecosystems. How do tree crowns, trees or entire forest stands respond to thinning in the long term? What effect do tree species mixtures and multi-layering have on the productivity and stability of trees, stands or forest enterprises? How do tree and stand growth respond to stress factors such as climate change or air pollution? Furthermore, in the event that one has acquired knowledge about the effects of thinning, mixture and stress, how can one make that knowledge applicable to decision-making in forestry practice? The experimental designs, analytical methods, general relationships and models for answering questions of this kind are the focus of this book. Given the structures dealt with, which range from plant organs to the tree, stand and enterprise levels, and the processes analysed in a time frame of days or months to decades or even centuries, this book is directed at all readers interested in trees, forest stands and forest ecosystems. This work has been compiled for students, scientists, lecturers, forest planners, forest managers, and consultants.

Lesný ekosystém je dynamický systém, ktorého vývoj a zmeny podliehajú veľkému počtu biologických, ekologických a socio-ekonomických faktorov. Nie je preto zvláštnosťou, že jeho zložitosť priťahuje pozornosť lesníckej vedy. Tá sa neustále snaží o prevedenie rastových procesov do sústavy rastových zákonitostí a matematických algoritmov. Tieto snahy pritom neboli a nie sú samoúčelné, ale sledujú využitie pre praktické účely. Lesnícka a ekologická veda a prax potrebuje predpovedať dopad rôznych vonkajších a vnútorných zásahov do lesných ekosystémov.

Dieses Buch fasst den Wissensstand über die Struktur und das Wachstum von Bäumen und Waldbeständen zusammen. Es ist die zweite und komplett überarbeitete Auflage der 2002 erstmals erschienenen „Grundlagen der Waldwachstumsforschung“. Das Buch vermittelt wie Bäume und Bestände wachsen, waldbaulich behandelt werden, auf Störungen reagieren und mathematisch nachgebildet werden. Die aufgezeigten neuen Denkmuster und Methoden schaffen ein Verständnis für das System Wald als Ganzes. Dieses Verständnis trägt zur nachhaltigen Entwicklung und Nutzung der Wälder in der Zukunft bei. Das Buch basiert auf Lehrveranstaltungen zu diesen Themen an der LMU und der TUM in München. Es ist sowohl für Studierende als auch für Wissenschaftler und Praktiker in den Bereichen Forstwissenschaft, Wald- und Landschaftsökologie, Naturschutz, Ressourcenmanagement und urbane Forstwissenschaft gedacht.