scholarly journals Landscape‐level vegetation conversion and biodiversity improvement after 33 years of restoration management in the Drentsche Aa brook valley

2021 ◽  
Author(s):  
Weier Liu ◽  
Christian Fritz ◽  
Sanderine Nonhebel ◽  
Henk F. Everts ◽  
Ab P. Grootjans
Keyword(s):  
Restoration Management ◽  
Landscape Level

A History of Landscape-Level Land Management Efforts in Haiti

10.1596/25764 ◽  
2016 ◽  
Author(s):  
Andrew Martin Tarter ◽  
Katie Kennedy Freeman ◽  
Klas Sander
Keyword(s):  
Land Management ◽  
History Of ◽  
Landscape Level

Landscape-level habitat suitability models for twelve species in southern Missouri

2003 ◽  
Author(s):  
Michael A. Larson ◽  
William D. Dijak ◽  
Frank R. III Thompson ◽  
Joshua J. Millspaugh
Keyword(s):  
Habitat Suitability ◽  
Habitat Suitability Models ◽  
Landscape Level

scholarly journals Factors influencing the persistence of reindeer lichens (Cladonia subgenus Cladina) within frequent-fire environments of the Mid-Atlantic Coastal Plain, USA

Fire Ecology ◽  
2020 ◽  
Vol 16 (1) ◽  
Author(s):  
David G. Ray ◽  
Gabriel D. Cahalan ◽  
James C. Lendemer
Keyword(s):  
Woody Debris ◽  
Forest Health ◽  
Bare Soil ◽  
Atlantic Coastal Plain ◽  
Restoration Management ◽  
Terricolous Lichens ◽  
Reindeer Lichens ◽  
In Fire ◽  
Atlantic Coastal ◽  
Overstory Composition

Abstract Background Prescribed fire is increasingly used to accomplish management goals in fire-adapted systems, yet our understanding of effects on non-target organisms remains underdeveloped. Terricolous lichens in the genus Cladonia P. Browne, particularly cushion-forming reindeer lichens belonging to Cladonia subgenus Cladina Nyl., fit into this category, being characteristic of fire-adapted ecosystems, yet highly vulnerable to damage or consumption during burns. Moreover, inherently slow dispersal and growth rates raise questions about how to conserve these taxa in the context of fire-mediated restoration management. This research was undertaken to identify factors that contribute to Cladonia persistence within areas subject to repeated burning and involved tracking the fate of 228 spatially isolated individuals distributed across seven sites previously burned zero to two times. Site selection was determined by edaphic factors associated with a rare inland dune woodland community type known to support relatively high densities of Cladonia. Results Evaluated across all sites, the post-burn condition of Cladonia subtenuis (Abbayes) Mattick samples, categorized as intact (32%), fragmented (33%), or consumed (36%) individuals, approximated a uniform distribution. However, their status was highly variable at the different sites, where from 0 to 70% were assessed as intact and 11 to 60% consumed. Machine-learning statistical techniques were used to identify the factors most strongly associated with fire damage, drawing from variables describing the proximate fuel bed, growth substrate, and fire weather. The final descriptive model was dominated by variables characterizing the understory fuel matrix. Conclusions Areas with highly contiguous fuels dominated by pyrogenic pine needles were most likely to result in consumption of individual Cladonia, whereas those growing in areas with low fuel continuity or in areas dominated by hardwood litter were more likely to persist (intact or as fragments). Further, substrates including bare soil and moss mats afforded more protection than coarse woody debris or leaf litter in settings where fuels were both contiguous and highly flammable. Our findings describe the characteristics of within-site fire refugia, the abundance of which may be enhanced over time through restoration and maintenance treatments including thinning, promotion of mixed-species overstory composition, and periodic burning. Because lichens contribute to, and are considered reliable indicators of forest health, fire-based restoration management efforts will benefit from improved understanding of how these vulnerable organisms are able to persist.

scholarly journals Effects of logging on landscape-level tree diversity across an elevational gradient in Bornean tropical forests

2021 ◽  
pp. e01739
Author(s):  
Sakiko Yano ◽  
Ryota Aoyagi ◽  
Fujiki Shogoro ◽  
John B. Sugau ◽  
Joan T. Pereira ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Elevational Gradient ◽  
Tree Diversity ◽  
Landscape Level

Landscape-level habitat management plan through geometric reserve design for critically endangered Hangul (Cervus hanglu hanglu)

2021 ◽  
pp. 146031
Author(s):  
Tanoy Mukherjee ◽  
Vandana Sharma ◽  
Lalit Kumar Sharma ◽  
Mukesh Thakur ◽  
Bheem Dutt Joshi ◽  
...  
Keyword(s):  
Habitat Management ◽  
Management Plan ◽  
Reserve Design ◽  
Critically Endangered ◽  
Landscape Level

Long distance pollen-mediated gene flow at a landscape level: the weed beet as a case study

2007 ◽  
Vol 16 (18) ◽  
pp. 3801-3813 ◽  
Author(s):  
STÉPHANE FÉNART ◽  
FRÉDÉRIC AUSTERLITZ ◽  
JOËL CUGUEN ◽  
JEAN-FRANÇOIS ARNAUD
Keyword(s):  
Gene Flow ◽  
Long Distance ◽  
Landscape Level

Refinement ofeDNAas an early monitoring tool at the landscape‐level: study design considerations

2019 ◽  
Vol 29 (6) ◽  
Author(s):  
E. L. Mize ◽  
R. A. Erickson ◽  
C. M. Merkes ◽  
N. Berndt ◽  
K. Bockrath ◽  
...  
Keyword(s):  
Study Design ◽  
Monitoring Tool ◽  
Design Considerations ◽  
Landscape Level

Effects of geographic information system vector–raster–vector data conversion on landscape indices

1996 ◽  
Vol 26 (8) ◽  
pp. 1416-1425 ◽  
Author(s):  
Pete Bettinger ◽  
Gay A. Bradshaw ◽  
George W. Weaver
Keyword(s):  
Information System ◽  
Fractal Dimension ◽  
Geographic Information System ◽  
Cell Size ◽  
Grid Cell ◽  
Conversion Process ◽  
Data Conversion ◽  
Edge Density ◽  
Gis Data ◽  
Landscape Level

The effects of geographic information system (GIS) data conversion on several polygon-and landscape-level indices were evaluated by using a GIS vegetation coverage from eastern Oregon, U.S.A. A vector–raster–vector conversion process was used to examine changes in GIS data. This process is widely used for data input (digital scanning of vector maps) and somewhat less widely used for data conversion (output of GIS data to specific formats). Most measures were sensitive to the grid cell size used in the conversion process. At the polygon level, using the conversion process with grid cell sizes of 3.05, 6.10, and 10 m produced relatively small changes to the original polygons in terms of ln(polygon area), ln(polygon perimeter), and 1/(fractal dimension). When grid cell size increased to 20 and 30 m, however, polygons were significantly different (p < 0.05) according to these polygon-level indices. At the landscape level, the number of polygons, polygon size coefficient of variation (CV), and edge density increased, while mean polygon size and an interspersion and juxtaposition index (IJI) decreased. The youngest and oldest age-class polygons followed the trends of overall landscape only in terms of number of polygons, mean polygon size, CV, and IJI. One major side effect of the conversion process was that many small polygons were produced in and around narrow areas of the original polygons. An alleviation process (referred to as the dissolving process) was used to dissolve the boundaries between similarly attributed polygons. When we used the dissolving process, the rate of change for landscape-level indices slowed; although the number of polygons and CV still increased with larger grid cell sizes, the increase was less than when the dissolving process was not used. Mean polygon size, edge density, and fractal dimension decreased after use of the dissolving process. Trends for the youngest and oldest age-class polygons were similar to those for the total landscape, except that IJI was greater for these age-classes than for the total landscape.

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