scholarly journals Green-tree retention and life after the beetle: stand structure and small mammals 30 years after salvage harvesting

Silva Fennica ◽  
2010 ◽  
Vol 44 (5) ◽  
Author(s):  
Thomas Sullivan ◽  
Druscilla Sullivan ◽  
Pontus Lindgren ◽  
Douglas Ransome
Keyword(s):  
Small Mammals ◽  
Stand Structure ◽  
Tree Retention ◽  
Green Tree Retention ◽  
Salvage Harvesting

Response of terrestrial small mammals to varying amounts and patterns of green-tree retention in Pacific Northwest forests

2007 ◽  
Vol 251 (3) ◽  
pp. 142-155 ◽  
Author(s):  
Robert A. Gitzen ◽  
Stephen D. West ◽  
Chris C. Maguire ◽  
Tom Manning ◽  
Charles B. Halpern
Keyword(s):  
Pacific Northwest ◽  
Small Mammals ◽  
Tree Retention ◽  
Green Tree Retention

Green-tree retention and recovery of an old-forest specialist, the southern red-backed vole (Myodes gapperi), 20 years after harvest

2017 ◽  
Vol 44 (8) ◽  
pp. 669 ◽  
Author(s):  
Thomas P. Sullivan ◽  
Druscilla S. Sullivan
Keyword(s):  
Small Mammals ◽  
Pinus Contorta ◽  
Mammalian Species ◽  
Basal Area ◽  
Structural Diversity ◽  
Post Harvest ◽  
Forest Sites ◽  
Tree Retention ◽  
Green Tree Retention ◽  
Aggregated Retention

Context Populations of many mammalian species are reduced as a result of clearcutting, despite the concurrent objectives of wood production and conservation of mammal diversity on cutover forest land. To help ameliorate this decline, green-tree retention (GTR) leaves large live trees after harvest to provide mature forest habitat and increase structural diversity of the regenerating stand. Aims To test the hypotheses (H) that, at 20 years after harvest, (H1) abundance, reproduction and survival of the southern red-backed vole (Myodes gapperi), as well as (H2) abundance and species diversity of the forest-floor small mammal community, would increase with the basal area (BA) and density of residual trees after harvest. Methods Small mammals were live-trapped in 2015–16 in replicated clearcut, dispersed retention, aggregated retention, patch cut and uncut forest sites in mixed forests of Douglas fir (Pseudotsuga menziesii var. glauca) and lodgepole pine (Pinus contorta Dougl. var. latifolia) in southern British Columbia, Canada. Key results Mean BA and density of overstory coniferous trees were significantly different at 20 years post-harvest, being higher on patch cut and uncut forest sites than on the clearcut and GTR sites. M. gapperi populations were significantly greater in aggregated retention and uncut forest sites than in the other sites, but demographic parameters were similar among sites, and therefore H1 was partly supported. Mean total abundance of small mammals differed significantly among sites, with the highest overall numbers occurring in the aggregated retention (16.2), clearcut (13.6) and uncut forest sites (11.9). Mean species richness and diversity were highest in the GTR and clearcut sites. Thus, H2 was not supported. Conclusions Recovery of M. gapperi in aggregated retention sites with 10m2 ha–1 BA of residual trees, as a group, occurred at 20 years post-harvest. Implications Aggregated retention of residual trees should help provide some habitat to conserve forest mammals on harvest openings, but successional development up to 20 years post-harvest may be required.

Green Tree Retention in Fennoscandian Forestry

2001 ◽  
Vol 16 (sup003) ◽  
pp. 79-90 ◽  
Author(s):  
Ilkka Vanha-Majamaa ◽  
Jyrki Jalonen
Keyword(s):  
Tree Retention ◽  
Green Tree Retention

STAND STRUCTURE AND SMALL MAMMALS IN YOUNG LODGEPOLE PINE FOREST: 10-YEAR RESULTS AFTER THINNING

2001 ◽  
Vol 11 (4) ◽  
pp. 1151-1173 ◽  
Author(s):  
Thomas P. Sullivan ◽  
Druscilla S. Sullivan ◽  
Pontus M. F. Lindgren
Keyword(s):  
Small Mammals ◽  
Stand Structure ◽  
Lodgepole Pine ◽  
Pine Forest

Orchid abundance in hemiboreal forests: stand-scale effects of clear-cutting, green-tree retention, and artificial drainage

2011 ◽  
Vol 41 (6) ◽  
pp. 1352-1358 ◽  
Author(s):  
Asko Lõhmus ◽  
Tiiu Kull
Keyword(s):  
Scale Effects ◽  
Current Knowledge ◽  
Timber Harvesting ◽  
Clear Cutting ◽  
Artificial Drainage ◽  
Tree Retention ◽  
Green Tree Retention ◽  
Retention Trees ◽  
The Impact ◽  
Site Types

The current knowledge on the impact of forest management on plant species of conservation concern is poor. We asked how three basic silvicultural techniques (clear-cutting, green-tree retention, and artificial drainage) affect the abundance of terrestrial orchid species and their communities in Estonia, hemiboreal Europe. Fixed-area, fixed-effort surveys (4 h per 2 ha plot) were used in 29 plot clusters representing five site types, with each cluster including plots of four treatments (old growth, mature managed forest, and cutover with and without live retention trees). Altogether 11 species of orchids were recorded in those 116 plots, with the most complete sets of species in artificially drained plots and mature stands. Five species were widely distributed among treatments and site types, but most site types also hosted shade-tolerant orchids (six species) that characteristically disappeared after timber harvesting. Cutover areas (3–7 years after harvest) hosted no species absent from uncut forest stands, and retention of solitary trees had no effect on orchid abundance over clear-cuts. Modern Estonian forest landscapes appear to support viable populations of many orchids, with rotation ages sufficient for population development of the majority of shade-tolerant species.

Immediate tree uprooting after retention-felling in a coniferous boreal forest in Fennoscandia

2006 ◽  
Vol 36 (12) ◽  
pp. 3167-3172 ◽  
Author(s):  
Harri Hautala ◽  
Ilkka Vanha-Majamaa
Keyword(s):  
Forest Type ◽  
Woody Debris ◽  
Post Treatment ◽  
Forest Types ◽  
Tree Retention ◽  
Green Tree Retention ◽  
Coniferous Boreal Forest ◽  
Tree Uprooting ◽  
High Level ◽  
The Continuum

We studied the immediate effects of retention-felling on the occurrence of tree uprooting in two different types of boreal spruce forest in Finland to determine whether susceptibility to uprooting is dependent on the biotope. During the first post-treatment year, 7.1% of the trees in the paludified forest type and 1.8% in the upland forest type were uprooted. During the 2 following post-treatment years, uprooting percentages increased considerably (39.3% in the paludified type and 11.5% in the upland type in year 2; 48.3% in the paludified type and 15.2% in the upland type in year 3). Norway spruce (Picea abies (L.) Karst.), the dominant species in both forest types, was the species most susceptible to uprooting. The high uprooting rate in the paludified groups was probably caused by an interaction between the rocky ground and moist overlying peat layer with the shallow root system of P. abies. As paludified forest biotopes are generally recognized to have high biodiversity, the use of green-tree retention in these biotypes may enhance the continuum and survival of sensitive species. Moreover, because of the high level of uprooting, green-tree retention in paludified forest types can quickly and more naturally help restore levels of coarse woody debris.

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