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Article

Plant Species Recovery on a Compacted Skid Road

1
Istanbul University, Faculty of Forestry, Forest Construction and Transportation Department 34473 Bahcekoy / Sariyer / Istanbul / Turkey
2
Istanbul University, Faculty of Forestry, Soil Science and Ecology Department 34473 Bahcekoy / Sariyer / Istanbul / Turkey
3
Istanbul University, Faculty of Forestry, Landscape Architecture Department 34473 Bahcekoy / Sariyer / Istanbul / Turkey
*
Author to whom correspondence should be addressed.
Sensors 2008, 8(5), 3123-3133; https://doi.org/10.3390/s8053123
Submission received: 3 February 2008 / Accepted: 2 May 2008 / Published: 15 May 2008

Abstract

:
This study was executed to determine the plant species of herbaceous cover in a skid road subjected to soil compaction due to timber skidding in a beech (Fagus orientalis Lipsky.) stand. Our previous studies have shown that ground based timber skidding destroys the soils extremely, and degradations on ecosystem because of the timber skidding limit recovery and growth of plant cover on skid roads. However, some plant species show healthy habitat, recovery and they can survive after the extreme degradation in study area. We evaluated composition of these plant species and their cover-abundance scales in 100 m x 3 m transect. 15 plant species were determined belongs to 12 plant families and Liliaceae was the highest representative plant family. Smilax aspera L., Epimedium pubigerum (DC.) Moren et Decaisne, Carex distachya Desf. var. distachya Desf., Pteridium aquilinum (L.) Kuhn., Trachystemon orientalis (L.) G. Don, Hedera helix L. have the highest cover-abundance scale overall of determined species on compacted skid road.

1. Introduction

Roads are critical components of civilization. Developing and maintaining the economic activity that is vital for the quality of modern life would be difficult without roads. Roads provide access for people to study, enjoy, or contemplate natural ecosystems [1-3]. Building and maintaining roads have become controversial, however, because of public concerns about their short and long term effects on the environment [4]. Potential ecological impacts of roads have received a great deal of attention in recent years. Particularly prominent management issues and research problems include effects of roads on soil erosion, hydrology and aquatic ecosystems. Effects of roads on forest plant communities are less well-documented [5]. Logging operations in forests can cause significant and wide spread soil disturbance, including removal, mixing and compaction of various soil layers. Disturbance can adversely affect both soil physical properties and soil nutrient levels to such an extent that severely diminished growth of subsequent tree rotations as well as significant increase in runoff and sediment loads may result [6]. That the production works being carried out in the forest have many negative impacts on the forest ecosystem is very well known. It has also been determined that the production and skidding negatively affect the amounts and variety of forest floor and herbaceous understory as well as youth development and living conditions of the soil organisms [7-15]. Skidding or yarding on terrain requires the construction of relatively dense network of forest roads including skid roads, haul roads and landings [16]. Skid roads are defined as tertiary roads that are used by skidders and forwarders that move logs from the point of felling and bucking to log landings. Apart from the felling of occasional trees to provide a clear path, few improvements are made to skid roads [5]. The dimension of the impact created by skidding of the products directly on the ground varies according to many factors such as slope, site characteristics, production methods used, planning of skid roads and production season. Ground-based skidding may result in soil compaction and other soil structural changes, influencing soil water retention, and reducing soil aeration, drainage, and root penetration. Studies focused on exotic plant invasions in roadside plant communities along main forest and grassland roads and in adjacent communities have been completed, but changes in plant composition within interior haul roads and skid trails have received little attention. The extent of haul road and skid road networks in managed forests and linkages between understory vascular plant communities and other flora and fauna, the impacts of these features on ecosystem properties and processes could be substantial [5].
In this study, we evaluated survived herbaceous plant species composition and their cover-abundance scales on the skid road subjected to compaction due to ground based timber skidding activities that have been carried out for many years (since 1956) in a beech (Fagus orientalis Lipsky.) stand.

2. Materials and Methods

Research area was in the boundaries of zone 82 of Istanbul Belgrad forest. Belgrad forest covering a surface area of 5441.71 ha located in the Marmara geographical region between latitudes 41° 09′ - 41° 12′ N and longitudes 28° 54′ - 29° 00′ E. According to the data given by Bahcekoy meteorology station, average annual precipitation is 1074.4 mm, average annual temperature is 12.8°C, average maximum temperature is 17.8°C and the average minimum temperature is 9°C. The climate of Istanbul Belgrad Forest is close to sea (ocean) climate with medium water deficit in summers. Vegetation period maintains for 7.5 months (230 days) in average. The period of study is October 2006 and research area is oriental beech (Fagus orientalis Lipsky) stand having canopy cover as 0.8, average diameter as 23.12 cm (the height of breast height above ground level is 1.30 m), average height as 24.14 m and stand density as 1400 trees/ha. Average altitude of the research area is 140 m, slope is 10-15% with SW aspect. The skidding road passing through the stand in west-east direction has long been used (since 1956) to skid the logs out of the area. It was estimated that 135 m3 timbers was skidded annually in harvest activities on the skid road. Last using date of skid road is in October 2004. Skid road width is 3.0 m [17]. The harvested timbers are also being towed by tractors with a rope along with skidding by means of manpower and animals.
We evaluated impacts of disturbance in interior skid road on understory herbaceous vegetation by documenting the areal extent of these features and plant composition along 100 m x 3 m belt transect in October 2006. During sampling 100m tapes were streched along transect to delineate skid road boundaries. Transect was oriented accros the road, perpendicular to its main axis (as described in [5]). The species composition on the transect on skid road was characterized by classical phytosociological plots according to Braun-Blanquet cover-abundance values [18]. which means that total coverage for each species (vertical projection onto the ground) was estimated visually and recorded within seven cover classes: r: 1 or 5 individuals; +: few individuals (<20) with cover <5%; 1: many individuals (20– 100) with cover <5%; 2: 5%–25% cover; 3: 25%–50% cover; 4: 50%–75% cover; 5: 75%–100% cover [14, 18]. Easily identified herbaceous plant species on skid road reported on the field, undetermined ones clipped and brought to the laboratory to determine by comparing the samples in Istanbul University Faculty of Forestry Herbarium and guide books. The general site characteristics of herbaceous plant species were reported as described in [19].

2. Results and Discussion

The skidding works that have been carried on for many years in beech (Fagus orientalis Lipsky) stand caused decreasing of the forest floor and the herbaceous cover on the skid road to a great extent. Furthermore, there were some other important changes in the soil properties at the two examined soil depths (0-5 cm and 5-10 cm) (Table 1). The major impact that occurred down to 10 cm soil depth was the compaction of soil. Higher volume and fine soil weight values compared to those of the undisturbed area were found at both the depths on the skid road subject to the soil compaction. The total porosity and moisture equivalence on the skid road decreased considerably [20]. In addition there were no significant differences for chemical properties of soil at 0-5 cm soil depth (N, P, K, Na, Ca, Mg, Fe, Zn, Cu and Mn). A significant difference between soil samples at 5-10 cm depth, taken from skid road and undisturbed area was found with respect to Mg (143.85 ppm) concentrations [21]. These previous results clearly show that skidding has particularly negative impacts on herbaceous cover, organic layer and soil. These effects of skidding on skid road have been demonstrated to have detrimental impacts on native flora, and herbaceous plant establishing and maintaining were limited. Similarly, Mariani et al. (2006) [22] reported that organic layer removal reduced abundance of herbs and shrubs. Soil compaction can also severely reduce plant growth by restricting root growth may be due to oxygen stress and lower the percentage of water and air space in the soil [23]. Also, Kozlowski (1999) [24] mentioned a reduced total photosynthesis when soils become increasingly compacted, as a result of smaller leaf areas.
On the other hand, likely more adapted (especially to soil compaction) and less herbaceous plant mass exist on skid road. We evaluated these plant species and their cover-abundance scales in 100m × 3 m transect. According to results obtained from this study, 15 plant species were determined belongs to 12 plant family (Table 2). Liliaceae was the highest representative plant family (Table 2). Smilax aspera L., Epimedium pubigerum (DC.) Moren et Decaisne, Carex distachya Desf. var. distachya Desf., Pteridium aquilinum (L.) Kuhn., Trachystemon orientalis (L.) G. Don, Hedera helix L. have the highest cover-abundance scale overall of determined species on compacted skid road (Table 2). 4 herbaceous plant species have second cover abundance scale (+, few, with small cover) on the skid road including; Lamium purpureum L. var. purpureum L., Ruscus hypoglossum L., Geranium asphodeloides Burm. Fil. subsp. asphodeloides Burm. Fil., Rubus discolor Weihe et Nees (Table 2). And other plant species including Stellaria holostea L., Primula vulgaris Huds. subsp. vulgaris Huds., Fragaria vesca L., Doronicum orientale Hoffm., Ornithogalum wiedemannii Boiss., have the “r” cover abundance scale, and they were solitary with small cover on the skid road (Table 2). Obtaining results show that determined plant species have the ability to grow on extreme soil and site conditions. Some earlier studies in other regions have also proved the survival capability most of these species on degraded, polluted or disturbed habitats which limit plant growth and survival as summarized on Table 3.
Effects of skid roads on soil properties and other site factors have been demonstrated to have detrimental impacts on native flora and fauna. And the capacity of vegetation recover depends on the ability of individual species to recover, habitat factors such as soil properties, microclimate and associate species composition. Establishing and maintaining native plant communities on forest roads is vital because until adequate plant cover is established, ripping alone provides only temporary and marginal improvements in soil structure. Herbaceous plant cover on roads can improve soil structure by increasing soil organic matter, reducing erosion and restoring the habitat lost. Successful revegetation may also help to keep roads closed by reducing their visibility. For these reasons, determining and availability of revegetation, recovery and survival success of native plant species have particular importance. Identification of native species would be successful to rehabilitate skid roads. In conclusion, the determined herbaceous species on skid road in this study show the resistance and survival capability on degraded soil and micro environment conditions.

References and Notes

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Table 1. Investigated soil properties in soil on skid road [20,21].
Table 1. Investigated soil properties in soil on skid road [20,21].
CharacteristicsUnits0-5 cm5-10 cm
Sand(%)58.0551.35
Silt(%)20.7430.88
Clay(%)21.2117.77
Soil AciditypH5.495.07
Electrical Conductivity(μhos cm-1)81.3248.02
Fine soil (<2mm) weight(g cm–3)0.763906.55
Coarse soil (>2mm) weight(g cm–3)0.137147.15
Root mass(g cm–3)2.762.79
Organic Carbon(%)10.207.32
Moisture Equivalent(%)24.3724.44
Total Porosity(%)52.7250.22
Moisture(%)20.8618.73
Compaction(kg cm-2)2.172.69
Bulk Density(g cm–3)0.9021.09
N(%)0.3580.198
P(ppm)3.831.08
K(ppm)105.4154.72
Na(ppm)19.2115.90
Ca(ppm)1706.44579.13
Mg(ppm)263.52143.85
Fe(ppm)1.110.74
Zn(ppm)112.7137.86
Cu(ppm)0.861.19
Mn(ppm)250.83188.72
Table 2. Survived plant species on compacted skid road, their general site characteristics and the cover-abundance scales.
Table 2. Survived plant species on compacted skid road, their general site characteristics and the cover-abundance scales.
The Plant FamilyThe Scientific Name of the Plant SpeciesGeneral Site CharacteristicsThe Cover-Abundance Scale
CARYOPHYLLACEAEStellaria holostea L.Scrubs, roadsides, damp places.r
PRIMULACEAEPrimula vulgaris Huds. subsp. vulgaris Huds.Often damp places in open or shady turfslopes, evergreen or deciduous woodlands, alpine meadows.r
LILIACEAESmilax aspera L.Macchie, scrub, ravines, and rocky limestone slopes.1
BERBERIDACEAEEpimedium pubigerum (DC.) Moren et DecaisneForest clearings1
LABIATAELamium purpureum L. var. purpureum L.Oak and fir forests, gravelly banks, fields and waste places.+
LILIACEAERuscus hypoglossum L.Mixed forests, scrubs, ravines, rocky places.+
ROSACEAEFragaria vesca L.Moist places, especially in forest.r
CYPERACEAECarex distachya Desf. var. distachya Desf.Dry stony slopes, open forests, roadsides1
GERANIACEAEGeranium asphodeloides Burm. Fil. subsp. asphodeloides Burm. Fil.Forests, scrubs, meadows, banks.+
COMPOSITAEDoronicum orientale HoffmShady paces in forests and scrubs..r
LILIACEAEOrnithogalum wiedemannii BoissWoods and forestsr
DENNSTAEDTIACEAEPteridium aquilinum (L.) Kuhn.In forest clearings, cleared woodland, dunes.1
BORAGINACEAETrachystemon orientalis (L.) G. DonFir forests, shady riverbanks, moist ravines.1
ARALIACEAEHedera helix L.Climbing over trees or creeping on the ground in woods.1
ROSACEAERubus discolor Weihe et Nees.Deciduous forests and scrubs, shady banks, coastal plains.+
Table 3. The characteristics and place of disturbed-degraded habitat where the plants can growth.
Table 3. The characteristics and place of disturbed-degraded habitat where the plants can growth.
Plant SpeciesThe characteristics and place of disturbed-degraded habitatReferences
Stellaria holostea L.under atmospheric nitrogen deposition, N deposited oak forest, Denmark[25]
oak dune forest, Denmark[26]
recovered on footpaths that have been closed for access for 6 years, Belgium[27]
under disturbed Q. pyrenaica ecosystems by human intervention, Spain[28]
under wooded landscapes human influented, UK[29]

Primula vulgaris Huds. subsp. vulgaris Huds.restoration of wet grasslands, Germany[30]

Smilax aspera L.undergrowth clearings of the coppice oak forests, Spain[31]
disturbed forest areas, potential restoration of natural vegetation, Spain[32]
forest disturbances (grazing and thinning), Spain[33]

Epimedium pubigerum (DC.) Moren et Decaisne--

Lamium purpureum L. var. purpureum L.radioactive-contaminated sites around nuclear power plant, Slovak Republic[34]
under the Mediterranean dryland conditions, effects of tillage systems, Turkey[35]
man made habitats with irregular disturbances, Czech Republic[36]

Ruscus hypoglossum L.in a nature park, Croatia[37]

Fragaria vesca L.oak dune forest, Denmark[26]
restoration of heathland/moorland, UK[38]
response to cattle grazing in mesic semi-natural grassland, Finland[39]
restoration success in alluvial grasslands under contrasting flooding regimes, Germany[40]
norway spruce forests following clearcutting and shelterwood cutting, Sweden[41]
contaminated soil of uranium waste depot, Czech Republic[42]

Carex distachya Desf. var. distachya Desf.plant reestablishment 15 years after the debris avalanche, USA- described as Carex sp.[43]
restoration of heathland/moorland, UK- described as Carex sp.[38]
forests following clearcutting and shelterwood cutting, Sweden. described as Carex sp.[41]

Geranium asphodeloides Burm. Fil. subsp. asphodeloides Burm. Fil.around villages in Sakarya province, Turkey[44]

Doronicum orientale Hoffm.on basaltic pyroclastic deposits at different altitudes, Italy[45]
on mountainous area (Yunt Mountain), Turkey[46]

Hedera helix L.recovered on footpaths that have been closed for access for 6 years, Belgium[27]
undergrowth clearings of the coppice oak forests, Spain[31]
forest disturbances (grazing and thinning), Spain[33]
pine forest clearings along the French Atlantic sand dunes, France[47]
in reclaimed area contaminated with dioxin, Italy[48]
man made urban habitats, urban-industrial ecosystems, Germany[49]

Rubus discolor Weihe et Nees.forest disturbances (grazing and thinning), Spain-described as Rubus sp.[33]

Ornithogalum wiedemannii Boiss.--

Pteridium aquilinum (L.) Kuhn.Initial recovery after wildfire and clear cut in Jack pine forest, USA[50]
pine forest clearings along the French Atlantic sand dunes, France[47]
under disturbed Q. pyrenaica ecosystems by human intervention, Spain[28]
glades, rides and roads in plantation forests, Ireland[51]
Short-term understory plant community responses to timber-harvesting intensity, USA[52]

Trachystemon orientalis (L.) G. Donafter woody vegetation control treatments (bulldozing and hand-grubbing), Turkey[53]
around villages in Sakarya province, Turkey[44]

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Demir, M.; Makineci, E.; Gungor, B.S. Plant Species Recovery on a Compacted Skid Road. Sensors 2008, 8, 3123-3133. https://doi.org/10.3390/s8053123

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Demir M, Makineci E, Gungor BS. Plant Species Recovery on a Compacted Skid Road. Sensors. 2008; 8(5):3123-3133. https://doi.org/10.3390/s8053123

Chicago/Turabian Style

Demir, Murat, Ender Makineci, and Beyza Sat Gungor. 2008. "Plant Species Recovery on a Compacted Skid Road" Sensors 8, no. 5: 3123-3133. https://doi.org/10.3390/s8053123

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