scholarly journals Landscape-scale vegetation dynamics inferred from spatial patterns of soilδ13C in a subtropical savanna parkland

2009 ◽  
Vol 114 (G1) ◽  
Author(s):  
Edith Bai ◽  
Thomas W. Boutton ◽  
X. Ben Wu ◽  
Feng Liu ◽  
Steven R. Archer
Keyword(s):  
Spatial Patterns ◽  
Vegetation Dynamics ◽  
Landscape Scale ◽  
Subtropical Savanna

scholarly journals Modeling Spatial Patterns of Humus Forms in Montane and Subalpine Forests: Implications of Local Variability for Upscaling

2018 ◽  
Vol 11 (1) ◽  
pp. 48
Author(s):  
Niels Hellwig ◽  
Dylan Tatti ◽  
Giacomo Sartori ◽  
Kerstin Anschlag ◽  
Ulfert Graefe ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Ground Cover ◽  
Landscape Scale ◽  
Local Scale ◽  
Mountain Forest ◽  
High Mountain ◽  
Subalpine Forests ◽  
Humus Forms ◽  
Humus Form ◽  
Local Variability

Humus forms are a distinctive morphological indicator of soil organic matter decomposition. The spatial distribution of humus forms depends on environmental factors such as topography, climate and vegetation. In montane and subalpine forests, environmental influences show a high spatial heterogeneity, which is reflected by a high spatial variability of humus forms. This study aims at examining spatial patterns of humus forms and their dependence on the spatial scale in a high mountain forest environment (Val di Sole/Val di Rabbi, Trentino, Italian Alps). On the basis of the distributions of environmental covariates across the study area, we described humus forms at the local scale (six sampling sites), slope scale (60 sampling sites) and landscape scale (30 additional sampling sites). The local variability of humus forms was analyzed with regard to the ground cover type. At the slope and landscape scale, spatial patterns of humus forms were modeled applying random forests and ordinary kriging of the model residuals. The results indicate that the occurrence of the humus form classes Mull, Mullmoder, Moder, Amphi and Eroded Moder generally depends on the topographical position. Local-scale patterns are mostly related to micro-topography (local accumulation and erosion sites) and ground cover, whereas slope-scale patterns are mainly connected with slope exposure and elevation. Patterns at the landscape scale show a rather irregular distribution, as spatial models at this scale do not account for local to slope-scale variations of humus forms. Moreover, models at the slope scale perform distinctly better than at the landscape scale. In conclusion, the results of this study highlight that landscape-scale predictions of humus forms should be accompanied by local- and slope-scale studies in order to enhance the general understanding of humus form patterns.

Forest fragmentation and forest management: A plea for empirical data

2002 ◽  
Vol 78 (5) ◽  
pp. 686-689 ◽  
Author(s):  
Robert G G. D'Eon
Keyword(s):  
Forest Management ◽  
Forest Fragmentation ◽  
Habitat Loss ◽  
Spatial Patterns ◽  
Empirical Data ◽  
Landscape Scale ◽  
Managed Forests ◽  
Habitat Loss And Fragmentation ◽  
Theoretical Predictions ◽  
Forest Managers

Forest fragmentation is one of the most important conservation issues of recent times. Most of what we know about forest fragmentation is based on speculation and untested theory due to a paucity of empirical data. The lack of empirical data can be attributed to (1) the extreme difficulty in conducting good fragmentation studies, and (2) confusion between habitat loss and fragmentation effects. Empirical data from well-designed fragmentation studies is direly needed to validate theoretical predictions stemming from the fragmentation paradigm. Since the best data will come from landscape-scale experiments in managed forests, partnerships and support from researchers and forest managers is critical in this pursuit. Key words: empirical data, forest fragmentation, landscape spatial patterns

Temporal and Spatial Patterns of Vegetation Dynamics. Advances in Vegetation Science.

1992 ◽  
Vol 119 (1) ◽  
pp. 90
Author(s):  
Scott Collins ◽  
J. Miles ◽  
W. Schmidt ◽  
E. van der Maarl
Keyword(s):  
Spatial Patterns ◽  
Vegetation Dynamics ◽  
Temporal And Spatial Patterns ◽  
Vegetation Science ◽  
Temporal And Spatial

Temporal and Spatial Patterns of Vegetation Dynamics.

1989 ◽  
Vol 77 (4) ◽  
pp. 1184
Author(s):  
J. A. Matthews ◽  
J. Miles ◽  
W. Schmidt ◽  
E. van der Maarel
Keyword(s):  
Spatial Patterns ◽  
Vegetation Dynamics ◽  
Temporal And Spatial Patterns ◽  
Temporal And Spatial

scholarly journals A Three-Dimensional Assessment of Soil δ13C in a Subtropical Savanna: Implications for Vegetation Change and Soil Carbon Dynamics

Soil Systems ◽  
2019 ◽  
Vol 3 (4) ◽  
pp. 73
Author(s):  
Yong Zhou ◽  
Thomas W. Boutton ◽  
X. Ben Wu
Keyword(s):  
Spatial Patterns ◽  
Vegetation Change ◽  
Three Dimensional ◽  
Shrub Encroachment ◽  
Woody Encroachment ◽  
C3 Plants ◽  
C Cycle ◽  
Dryland Ecosystems ◽  
Dimensional Assessment ◽  
Subtropical Savanna

Tree/shrub encroachment into drylands is a geographically widespread vegetation change that often modifies soil organic carbon (SOC) storage and dynamics, and represents an important yet uncertain aspect of the global carbon (C) cycle. We quantified spatial patterns of soil δ13C to 1.2 m depth in a subtropical savanna to evaluate the magnitude and timing of woody encroachment, and its impacts on SOC dynamics. Woody encroachment dramatically altered soil δ13C spatial patterns throughout the profile; values were lowest in the interiors of woody patches, increased towards the peripheries of those patches, and reached highest values in the surrounding grasslands. Soil δ13C and 14C revealed this landscape was once dominated by C4 grasses. However, a rapid vegetation change occurred during the past 100–200 years, characterized by (1) the formation and expansion of woody patches across this landscape, and (2) increased C3 forb abundance within remnant grasslands. Tree/shrub encroachment has substantially increased SOC and the proportion of new SOC derived from C3 plants in the SOC pool. These findings support the emerging perspective that vegetation in many dryland ecosystems is undergoing dramatic and rapid increases in SOC storage, with implications for the C cycle at regional and global scales.

scholarly journals Regional and landscape-scale variability of Landsat-observed vegetation dynamics in northwest Siberian tundra

2014 ◽  
Vol 9 (2) ◽  
pp. 025004 ◽  
Author(s):  
Gerald V Frost ◽  
Howard E Epstein ◽  
Donald A Walker
Keyword(s):  
Vegetation Dynamics ◽  
Landscape Scale

Long and lasting: spatial patterns and temporal trends in a fish community responding to landscape-scale hydrological restoration of a coastal freshwater wetland complex

2021 ◽  
Vol 36 (5) ◽  
pp. 1511-1532
Author(s):  
Nick S. Whiterod ◽  
Lauren Brown ◽  
Mark Bachmann ◽  
Lachlan Farrington ◽  
Lorenzo Vilizzi
Keyword(s):  
Spatial Patterns ◽  
Fish Community ◽  
Temporal Trends ◽  
Landscape Scale ◽  
Freshwater Wetland ◽  
Wetland Complex

Rooting strategies in a subtropical savanna: a landscape-scale three-dimensional assessment

Oecologia ◽  
2018 ◽  
Vol 186 (4) ◽  
pp. 1127-1135 ◽  
Author(s):  
Yong Zhou ◽  
Thomas W. Boutton ◽  
X. Ben Wu ◽  
Cynthia L. Wright ◽  
Anais L. Dion
Keyword(s):  
Three Dimensional ◽  
Landscape Scale ◽  
Dimensional Assessment ◽  
Subtropical Savanna
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