Forest ecosystem dynamics: a project for understanding northern ecosystems and their response to global change

1993 ◽  
Author(s):  
D. L. Williams ◽  
W. T. Lawrence ◽  
E. R. Levine ◽  
K. J. Ranson ◽  
R. G. Knox ◽  
...  
Keyword(s):  
Global Change ◽  
Forest Ecosystem ◽  
Ecosystem Dynamics

The Lake Duparquet Research and Teaching Forest: Building a foundation for ecosystem management

1999 ◽  
Vol 75 (3) ◽  
pp. 389-393 ◽  
Author(s):  
Brian Harvey
Keyword(s):  
Ecosystem Management ◽  
Forest Ecosystem ◽  
Research Program ◽  
Scientific Basis ◽  
Ecosystem Dynamics ◽  
Fire Disturbance ◽  
Research And Teaching ◽  
Research Activities ◽  
Boreal Shield ◽  
Natural Dynamics

The Lake Duparquet Research and Teaching Forest is situated in northwestern Quebec in the Boreal Shield Ecozone. Managed by two constituents of the Université du Québec, in collaboration with two forest companies, Norbord and Tembec, the Lake Duparquet Forest has a strong research program focussed on natural forest ecosystem dynamics that provides the scientific basis for management and silvicultural trials recently begun in the Forest. A bibliographical review of research activities is presented. Keywords: boreal, mixedwood, natural dynamics, fire, disturbance, ecosystem management, silviculture

scholarly journals AEROSPACE MONITORING OF THE FOREST ECOSYSTEM DYNAMICS WITHIN THE TERRITORY OF VRACHANSKI BALKAN NATURE PARK

2018 ◽  
pp. 41-46
Author(s):  
Adlin Dancheva
Keyword(s):  
Remote Sensing ◽  
Forest Ecosystem ◽  
Vegetation Index ◽  
Forest Ecosystems ◽  
Normalized Difference Vegetation Index ◽  
Remote Sensing And Gis ◽  
Ecosystem Dynamics ◽  
Anthropogenic Pressure ◽  
Water Index ◽  
Nature Park

In this paper the application of Remote Sensing and GIS as a means of performing aero – space monitoring of forest ecosystems dynamics is being considered. The purpose of this work is to create a model for monitoring the dynamic of forest ecosystems, based on Remote Sensing and GIS. The results of eco-monitoring can be used to update plans and policies for forest ecosystem management. The territory of Vrachanski Balkan Nature park was chosen as the subject of research as there is a certain anthropogenic pressure there. The results presented are obtained by spatial-time analysis of certain aerospace data indices. To carry out the study optical satellite images were used, on the basics of which three indices were calculated: Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI) and Normalized Difference Greenness Index (NDGI). A comparative analysis has been created and results of the degree of correlation between the different indices are presented, as well as indicators from the different test areas and related changes in the individual points in time. The results of the survey aim to assess the dynamics and condition of the forest vegetation on the territory of Vrachanski Balkan Nature park and can be utilised in activities related to monitoring, mapping and forest management.

Net Primary Production in the Shortgrass Steppe

2008 ◽  
Author(s):  
William K. Lauenroth ◽  
Daniel G. Milchunas
Keyword(s):  
Global Change ◽  
Primary Production ◽  
Net Primary Production ◽  
Regional Scale ◽  
Ecosystem Dynamics ◽  
Shortgrass Steppe ◽  
Annual Precipitation ◽  
Mean Annual Precipitation ◽  
Spatial And Temporal Patterns ◽  
Temporal And Spatial

Net primary production (NPP), the amount of carbon or energy fixed by green plants in excess of their respiratory needs, is the fundamental quantity upon which all heterotrophs and the ecosystem processes they are associated with depend. Understanding NPP is therefore a prerequisite to understanding ecosystem dynamics. Our objectives for this chapter are to describe the current state of our knowledge about the temporal and spatial patterns of NPP in the shortgrass steppe, to evaluate the important variables that control NPP, and to discuss the future of NPP in the shortgrass steppe given current hypotheses about global change. Most of the data available for NPP in the shortgrass steppe are for aboveground net primary production (ANPP), so most of our presentation will focus on ANPP and we will deal with belowground net primary production (BNPP) as a separate topic. Furthermore, our treatment of NPP in this chapter will ignore the effects of herbivory, which will be covered in detail in chapter 16. Our approach will be to start with a regional-scale view of ANPP in shortgrass ecosystems and work toward a site-scale view. We will begin by briefly placing ANPP in the shortgrass steppe in its larger context of the central North American grassland region. We will then describe the regional-scale patterns and controls on ANPP, and then move to the site-scale patterns and controls on ANPP. At the site scale, we will describe both temporal and spatial dynamics, and controls on ANPP as well as BNPP. We will then discuss relationships between spatial and temporal patterns in ANPP and end the chapter with a short, speculative section on how future global change may influence NPP in the shortgrass steppe. Temperate grasslands in central North America are found over a range of mean annual precipitation from 200 to 1200 mm.y–1 and mean annual temperatures from 0 to 20 oC (Lauenroth et al., 1999). The widely cited relationship between mean annual precipitation and average annual ANPP allows us to convert the precipitation gradient into a production gradient (Lauenroth, 1979; Lauenroth et al., 1999; Noy-Meir, 1973; Rutherford, 1980; Sala et al., 1988b).

scholarly journals Young and old forest in the boreal: critical stages of ecosystem dynamics and management under global change

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Timo Kuuluvainen ◽  
Sylvie Gauthier
Keyword(s):  
Global Change ◽  
Ecosystem Dynamics

scholarly journals Trophic Redundancy and Predator Size Class Structure Drive Differences in Kelp Forest Ecosystem Dynamics

2020 ◽  
Vol 101 (2) ◽  
Author(s):  
Jacob H. Eisaguirre ◽  
Joseph M. Eisaguirre ◽  
Kathryn Davis ◽  
Peter M. Carlson ◽  
Steven D. Gaines ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Kelp Forest ◽  
Size Class ◽  
Ecosystem Dynamics ◽  
Class Structure ◽  
Predator Size

scholarly journals Trophic redundancy and predator size class structure drive differences in kelp forest ecosystem dynamics

Ecology ◽  
2020 ◽  
Vol 101 (5) ◽  
Author(s):  
Jacob H. Eisaguirre ◽  
Joseph M. Eisaguirre ◽  
Kathryn Davis ◽  
Peter M. Carlson ◽  
Steven D. Gaines ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Kelp Forest ◽  
Size Class ◽  
Ecosystem Dynamics ◽  
Class Structure ◽  
Predator Size

Forest ecosystem dynamics: linking forest succession, soil process and radiation models

1993 ◽  
Vol 65 (3-4) ◽  
pp. 199-219 ◽  
Author(s):  
E.R. Levine ◽  
K.J. Ranson ◽  
J.A. Smith ◽  
D.L. Williams ◽  
R.G. Knox ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Forest Succession ◽  
Ecosystem Dynamics ◽  
Soil Process

scholarly journals Coordinated approaches to quantify long-term ecosystem dynamics in response to global change

2011 ◽  
Vol 17 (2) ◽  
pp. 843-854 ◽  
Author(s):  
YIQI LUO ◽  
JERRY MELILLO ◽  
SHULI NIU ◽  
CLAUS BEIER ◽  
JAMES S. CLARK ◽  
...  
Keyword(s):  
Global Change ◽  
Ecosystem Dynamics
Sign in / Sign up

Export Citation Format

Share Document