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

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

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.

A mass-balanced food web model for a kelp forest ecosystem near its southern distributional limit in the northern hemisphere

Food Webs ◽  
2018 ◽  
Vol 17 ◽  
pp. e00091 ◽  
Author(s):  
Ainoa Vilalta-Navas ◽  
Rodrigo Beas-Luna ◽  
Luis E. Calderon-Aguilera ◽  
Lydia Ladah ◽  
Fiorenza Micheli ◽  
...  
Keyword(s):  
Food Web ◽  
Northern Hemisphere ◽  
Forest Ecosystem ◽  
Kelp Forest ◽  
Distributional Limit ◽  
Food Web Model

scholarly journals Use of nursery areas by the extinct megatooth shark Otodus megalodon (Chondrichthyes: Lamniformes)

2020 ◽  
Vol 16 (11) ◽  
pp. 20200746
Author(s):  
Jose L. Herraiz ◽  
Joan Ribé ◽  
Héctor Botella ◽  
Carlos Martínez-Pérez ◽  
Humberto G. Ferrón
Keyword(s):  
Middle Miocene ◽  
Spatial Scales ◽  
Gaussian Mixture Models ◽  
Marine Species ◽  
Gaussian Mixture ◽  
Size Class ◽  
Class Structure ◽  
Nursery Areas ◽  
First Time ◽  
Slow Growing

Nursery areas are fundamental for the success of many marine species, particularly for large, slow-growing taxa with low fecundity and high age of maturity. Here, we examine the population size-class structure of the extinct gigantic shark Otodus megalodon in a newly described middle Miocene locality from Northeastern Spain, as well as in eight previously known formations (Temblor, Calvert, Pisco, Gatún, Chucunaque, Bahía Inglesa, Yorktown and Bone Valley). In all cases, body lengths of all individuals were inferred from dental parameters and the size-class structure was estimated from kernel probability density functions and Gaussian mixture models. Our analyses support the presence of five potential nurseries ranging from the Langhian (middle Miocene) to the Zanclean (Pliocene), with higher densities of individuals with estimated body lengths within the typical range of neonates and young juveniles. These results reveal, for the first time, that nursery areas were commonly used by O. megalodon over large temporal and spatial scales, reducing early mortality and playing a key role in maintaining viable adult populations. Ultimately, the presumed reliance of O. megalodon on the presence of suitable nursery grounds might have also been determinant in the demise of this iconic top predatory shark.

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

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
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