Changes of forest stand dynamics in Europe. Facts from long-term observational plots and their relevance for forest ecology and management

2014 ◽  
Vol 316 ◽  
pp. 65-77 ◽  
Author(s):  
Hans Pretzsch ◽  
Peter Biber ◽  
Gerhard Schütze ◽  
Kamil Bielak
Keyword(s):  
Forest Ecology ◽  
Forest Stand ◽  
Stand Dynamics

scholarly journals The anatomy of a woodland: Stand profile diagrams as an aid to problem-based learning in undergraduate forestry education

2009 ◽  
Vol 85 (5) ◽  
pp. 725-732 ◽  
Author(s):  
A D Leslie ◽  
E R Wilson
Keyword(s):  
Learning Strategies ◽  
Professional Education ◽  
Personal Development ◽  
Teaching And Learning ◽  
Forest Ecology ◽  
Problem Based Learning ◽  
Forest Stand ◽  
Stand Dynamics ◽  
Forestry Education ◽  
Professional Disciplines

Forestry education is poorly served with published examples of teaching and learning methods that enable students to engage actively with the discipline. This is not the case in other professional disciplines, such as the biology, medicine and engineering, where sub-disciplines have emerged and are devoted to the development and evaluation of optimum learning strategies. In this paper we present a short field-based practical that introduces forestry students to forest stand dynamics, applied forest ecology and silviculture. Students measure a series of tree and stand parameters in 2 contrasting forest types. They then analyze and interpret the data to develop their understanding. Reflective practice is built in by setting questions designed to promote enquiry and the self-identification of future avenues for personal development. The project, as described here, was devised for students at the National School of Forestry, England, but the principles could be applied to almost any learning environment. Planning within curriculum teams would be required to identify the appropriate location for this exercise in specific undergraduate programmes. Key words: forest stand dynamics, silviculture, problem-based learning, reflection, professional education

scholarly journals A Multivariate Hybrid Stochastic Differential Equation Model for Whole-Stand Dynamics

Mathematics ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 2230
Author(s):  
Petras Rupšys ◽  
Martynas Narmontas ◽  
Edmundas Petrauskas
Keyword(s):  
Differential Equation ◽  
Stochastic Differential Equation ◽  
Diffusion Processes ◽  
Basal Area ◽  
Equation Model ◽  
Forest Stand ◽  
Growth And Yield ◽  
Stand Dynamics ◽  
Mixed Effect ◽  
Pine Tree

The growth and yield modeling of a forest stand has progressed rapidly, starting from the generalized nonlinear regression models of uneven/even-aged stands, and continuing to stochastic differential equation (SDE) models. We focus on the adaptation of the SDEs for the modeling of forest stand dynamics, and relate the tree and stand size variables to the age dimension (time). Two different types of diffusion processes are incorporated into a hybrid model in which the shortcomings of each variable types can be overcome to some extent. This paper presents the hybrid multivariate SDE regarding stand basal area and volume models in a forest stand. We estimate the fixed- and mixed-effect parameters for the multivariate hybrid stochastic differential equation using a maximum likelihood procedure. The results are illustrated using a dataset of measurements from Mountain pine tree (Pinus mugo Turra).

Long-term stand dynamics of old-growth mountain longleaf pine (Pinus palustris) woodlands

2016 ◽  
Vol 364 ◽  
pp. 154-164 ◽  
Author(s):  
Darcy H. Hammond ◽  
J. Morgan Varner ◽  
Zhaofei Fan ◽  
John S. Kush
Keyword(s):  
Longleaf Pine ◽  
Pinus Palustris ◽  
Stand Dynamics ◽  
Old Growth

Identifying keystone plant resources in an Amazonian forest using a long-term fruit-fall record

2014 ◽  
Vol 30 (4) ◽  
pp. 291-301 ◽  
Author(s):  
Zoë Diaz-Martin ◽  
Varun Swamy ◽  
John Terborgh ◽  
Patricia Alvarez-Loayza ◽  
Fernando Cornejo
Keyword(s):  
Resource Scarcity ◽  
Forest Stand ◽  
Community Stability ◽  
Plant Resources ◽  
Continuous Record ◽  
Amazonian Rain Forest ◽  
Amazonian Forests ◽  
Conservation And Management ◽  
Fruit Crop Size

Abstract:The keystone plant resources (KPR) concept describes certain plant species in tropical forests as vital to community stability and diversity because they provide food resources to vertebrate consumers during the season of scarcity. Here, we use an 8-y, continuous record of fruit fall from a 1.44-ha mature forest stand to identify potential KPRs in a lowland western Amazonian rain forest. KPRs were identified based on four criteria: temporal non-redundancy; year-to-year reliability; abundance of reproductive-size individuals and inferred fruit crop size; and the variety of vertebrate consumers utilizing their fruit. Overall, seven species were considered excellent KPRs: two of these belong to the genusFicus, confirming that this taxon is a KPR as previously suggested.Celtis iguanaea(Cannabaceae) – a canopy liana – has also been previously classified as a KPR; in addition,Pseudomalmea diclina(Annonaceae),Cissus ulmifolia(Vitaceae),Allophylus glabratus(Sapindaceae) andTrichilia elegans(Meliaceae) are newly identified KPRs. Our results confirm that a very small fraction (<5%) of the plant community consistently provides fruit for a broad set of consumers during the period of resource scarcity, which has significant implications for the conservation and management of Amazonian forests.

scholarly journals Stand Dynamics, Humus Type and Water Balance Explain Aspen Long Term Productivity across Canada

Forests ◽  
2015 ◽  
Vol 6 (12) ◽  
pp. 416-432 ◽  
Author(s):  
Kenneth Anyomi ◽  
François Lorenzetti ◽  
Yves Bergeron ◽  
Alain Leduc
Keyword(s):  
Water Balance ◽  
Stand Dynamics ◽  
Humus Type

scholarly journals Impact of Industrial Waste on Natural Resources: A Review in the Context of Bangladesh

2021 ◽  
Vol 16 (2) ◽  
pp. 348-361
Author(s):  
Umama Begum Ruba ◽  
Kakon Chakma ◽  
Jarrin Yeasmin Senthi ◽  
Saidur Rahman
Keyword(s):  
Natural Resources ◽  
Industrial Waste ◽  
Forest Ecology ◽  
Industrial Sector ◽  
Policy Enforcement ◽  
Substantial Impact ◽  
Environmentally Sustainable ◽  
Effective Policy ◽  
Published Research

Although the industrial sector contributes significantly to Bangladesh's economic growth and development, unplanned rapid industrialization is having a detrimental impact on natural resources. Since industrial waste has become a major concern, this study reviewed previously published research papers to highlight the detrimental effects of industrial waste on natural resources. This review observed industrial waste have a substantial impact on natural resources, causing contamination of the air, water, and soil, alongside disruption of aquatic and forest ecology. Therefore, effective policy enforcement is expected to ensure that industrialization is sustainable, both in terms of mitigating environmental pollution and promoting more environmentally friendly industries. Bangladesh's long-term sustainability and prosperity necessitate industrialization, but it should be done in an environmentally sustainable manner.

scholarly journals Improving long-term forest ecology research for the 21st century

1999 ◽  
Vol 75 (3) ◽  
pp. 477-480 ◽  
Author(s):  
R. A. Lautenschlager
Keyword(s):  
Ecological Study ◽  
Forest Ecology ◽  
Spatial Scales ◽  
Environmental Concerns ◽  
Ecosystem Research ◽  
Public Comment ◽  
Landscape Monitoring ◽  
Temporal And Spatial ◽  
Forest Vegetation Management

Changes in scientific views, approaches, and the public's environmental concerns have broadened the foci of silvicultural research from individuals in stands to these plus other interacting components at broader temporal and spatial scales. Present studies have benefited from increasing interdisciplinary ecological study; however, even the most interdisciplinary research and management could be improved by (1) moving beyond public comment to incorporating the public's environmental concerns into experimental and management designs; (2) being conducted at scales (time and space) that are appropriate to ecosystem components of greatest concern; (3) encouraging researchers and managers to test their knowledge using landscape-level forest vegetation management and checking predictions using sufficient monitoring; and (4) recognizing that within-study integration will require identifying study-appropriate integrative currencies. Key words: ecosystem research, integrative currency, landscape, monitoring, public values, scale, solutions

Plant Spread Dynamics and Spatial Patterns in Forest Ecology

2004 ◽  
Author(s):  
Sergio A. Cannas ◽  
Diana E. Marco
Keyword(s):  
Public Health ◽  
Biological Invasions ◽  
Exotic Species ◽  
Native Species ◽  
Forest Ecology ◽  
Soil Composition ◽  
Heavy Grazing ◽  
Spread Dynamics ◽  
Strong Disturbance

Species in an ecosystem can be classified as natives or exotics. Native species are those that have coevolved in the ecosystem, while exotic ones have not. The introduction of exotic species into an ecosystem is usually associated with human influence, which can be intentional or accidental. Some exotic species do not survive, at least not without artificial assistance. But some others do quite well on their own in a new environment. Exotic species may have no natural predators in the new environment or they may make better use of the natural resources than the natives, so they spread in the new territory and compete with some of the natives, who eventually become extinct. Exotic species that successfully establish and spread in an ecosystem are called invaders. The process by which an invader arrives and spreads into the new territory is called biological invasion. It is worth mentioning that, although invaders are usually exotic species, sometimes native species may also behave like invaders. That is, if an ecosystem suffers a strong disturbance, like fire or heavy grazing, some native species whose populations were originally stable may start to grow, outcompeting other native species. There are many examples of introduced species that became invaders, ranging from bacteria to cattle. Accidental or intentional introductions by humans are responsible for most of the present biological invasions, threatening the structure and functioning of many ecosystems. There are many effects associated with biological invasions, perhaps the most important one being the possible loss of biodiversity in the long term. But biological invasions may also introduce changes in different environmental traits, like climate, hydrology (invaders may consume more water than natives), and soil composition (for instance, some plants take up salt from soil and deposit it on the surface, making it unsuitable for some native species). All these changes have strong economical impacts, considering their influences in agriculture, forestry, and public health [9]. Hence, it is of interest to understand this phenomenon in order to predict the potential invasiveness of a species before its introduction in an ecosystem, and to develop strategies of control for invasive species that have already been introduced.

The development of even-aged plantation forests: an exercise in forest stand dynamics

2008 ◽  
Vol 42 (4) ◽  
pp. 170-176 ◽  
Author(s):  
E. R. Wilson ◽  
A. D. Leslie
Keyword(s):  
Forest Stand ◽  
Stand Dynamics ◽  
Plantation Forests
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