Spatial and temporal dynamics in canopy dominance of an old-growth central Appalachian forest

2006 ◽  
Vol 36 (6) ◽  
pp. 1536-1550 ◽  
Author(s):  
Ryan W McEwan ◽  
Robert N Muller
Keyword(s):  
Temporal Dynamics ◽  
Acer Rubrum ◽  
Deciduous Forests ◽  
Eastern North America ◽  
Ecological Communities ◽  
Old Growth ◽  
Spatial And Temporal Dynamics ◽  
Acidic Sites ◽  
Quercus Spp ◽  
Upper Slope

Many old-growth deciduous forests in eastern North America exhibit dynamics that suggest succession from dominance by oaks (Quercus spp.) to dominance by maples (Acer spp.). We examined this phenomenon using 20 years of vegetation data from an old-growth central Appalachian forest. Considering the site as a whole, the importance of Quercus spp. declined and that of Acer spp. increased. In particular, Acer rubrum L. exhibited increasing importance in the overstory canopy on upper slopes, and Quercus spp. exhibited a contraction in spatial distribution, particularly in the midstory (P < 0.05). This narrowing of distribution in Quercus spp. was associated with regeneration being restricted to dry, acidic sites. We also considered successional dynamics within three previously identified ecological communities in the study area: oak, mixed mesophytic, and beech. This analysis indicated that increased A. rubrum importance was limited to the upper-slope oak community. A successional dynamic was not apparent in the mixed mesophytic community, and the beech community was characterized by increasing importance of Tsuga canadensis (L.) Carr. Our results suggest that ecological communities have distinct successional trajectories and that predictions of future dynamics must consider topographic and ecological gradients.

Macrohyporia extensa and its synonym Poria cocos

1983 ◽  
Vol 61 (6) ◽  
pp. 1672-1679 ◽  
Author(s):  
J. Ginns ◽  
Josiah L. Lowe
Keyword(s):  
North America ◽  
Deciduous Forests ◽  
Eastern North America ◽  
Old Growth ◽  
Poria Cocos ◽  
Butt Rot

Daedalea extensa Peck is an earlier name for Poria cocos Wolf, the fungus commonly called tuckahoe. Descriptions of the basidiomes and cultures are presented. In the northern deciduous forests of eastern North America the fungus typically occurs as a trunk and butt rot of mature, old-growth trees. The basidiomes appear after the tree has died. Reports of the fungus from Manitoba, Saskatchewan, and Alberta require confirmation because of confusion with the Canadian tuckahoe, Polyporus tuberaster Fr. Both D. extensa and Merulius sulphureus Burt are transferred to Macrohyporia.

Spatial and temporal dynamics of 20th century carbon storage and emissions after wildfire in an old-growth forest landscape

2019 ◽  
Vol 449 ◽  
pp. 117461 ◽  
Author(s):  
Lucas B. Harris ◽  
Andrew E. Scholl ◽  
Amanda B. Young ◽  
Becky L. Estes ◽  
Alan H. Taylor
Keyword(s):  
20Th Century ◽  
Carbon Storage ◽  
Temporal Dynamics ◽  
Forest Landscape ◽  
Old Growth ◽  
Old Growth Forest ◽  
Spatial And Temporal Dynamics

Spatial and temporal dynamics of lexico-semantic processing in American Sign Language

2011 ◽  
Author(s):  
M. Leonard ◽  
N. Ferjan Ramirez ◽  
C. Torres ◽  
M. Hatrak ◽  
R. Mayberry ◽  
...  
Keyword(s):  
American Sign Language ◽  
Sign Language ◽  
Semantic Processing ◽  
Temporal Dynamics ◽  
American Sign ◽  
Spatial And Temporal Dynamics

Spatial and temporal dynamics of Pacific capelin Mallotus catervarius in the Gulf of Alaska: implications for ecosystem-based fisheries management

2020 ◽  
Vol 637 ◽  
pp. 117-140 ◽  
Author(s):  
DW McGowan ◽  
ED Goldstein ◽  
ML Arimitsu ◽  
AL Deary ◽  
O Ormseth ◽  
...  
Keyword(s):  
Temporal Dynamics ◽  
Marine Ecosystem ◽  
Gulf Of Alaska ◽  
Data Series ◽  
Limited Information ◽  
Important Species ◽  
Multiple Data ◽  
Spatial And Temporal Dynamics ◽  
Spawning Areas ◽  
Spatio Temporal

Pacific capelin Mallotus catervarius are planktivorous small pelagic fish that serve an intermediate trophic role in marine food webs. Due to the lack of a directed fishery or monitoring of capelin in the Northeast Pacific, limited information is available on their distribution and abundance, and how spatio-temporal fluctuations in capelin density affect their availability as prey. To provide information on life history, spatial patterns, and population dynamics of capelin in the Gulf of Alaska (GOA), we modeled distributions of spawning habitat and larval dispersal, and synthesized spatially indexed data from multiple independent sources from 1996 to 2016. Potential capelin spawning areas were broadly distributed across the GOA. Models of larval drift show the GOA’s advective circulation patterns disperse capelin larvae over the continental shelf and upper slope, indicating potential connections between spawning areas and observed offshore distributions that are influenced by the location and timing of spawning. Spatial overlap in composite distributions of larval and age-1+ fish was used to identify core areas where capelin consistently occur and concentrate. Capelin primarily occupy shelf waters near the Kodiak Archipelago, and are patchily distributed across the GOA shelf and inshore waters. Interannual variations in abundance along with spatio-temporal differences in density indicate that the availability of capelin to predators and monitoring surveys is highly variable in the GOA. We demonstrate that the limitations of individual data series can be compensated for by integrating multiple data sources to monitor fluctuations in distributions and abundance trends of an ecologically important species across a large marine ecosystem.

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