Partial forest harvesting effects on erosion flux in a headwater catchment (Strengbach catchment, France)

2020 ◽  
Author(s):  
Solenn Cotel ◽  
Daniel Viville ◽  
Marie-Claire Pierret
Keyword(s):  
Forest Management ◽  
Stream Water ◽  
Forest Harvesting ◽  
High Flow ◽  
Main Stream ◽  
Clear Cutting ◽  
The Mean ◽  
The Impact ◽  
Strengbach Catchment ◽  
Tree Harvesting

<p>Due to the increasing global need for wood, forest management and especially tree harvesting have become increasingly challenging for the sustainability of forest ecosystems. Indeed, the natural dynamics of solid exports in rivers can be strongly disturbed by anthropogenic activities including forestry. The impact of forest management on erosion flux can be due to tree logging but also to forest roads, skid trails, stream crossings required for silvicultural operations.</p><p>The impact of forestry on solid exports in mountainous environment has been studied in a small granitic watershed (0.8 Km²) located in the Vosges massif. Between July and August 2014, the Strengbach catchment (Observatoire Hydro-Géochimique de l’Environnement) was concerned by clear-cutting on some plots located near the main stream. This small extended forestry operation (2.3% of the catchment) involved the logging of trees and the implementation of skid trail network including poorly designed stream crossings. The bedload flux was estimated since April 2009. The suspended sediment (SS) flux was evaluated on the basis of stream water samples collected every 16 hours and during high-flow events since December 2012.</p><p>Before the forestry operation, the mean bedload flux was 2.5 T/yr±8% for a mean outlet runoff of 730 mm/yr, although the SS flux was 7.7 T/yr±10% for an outlet runoff of 950 mm/yr.</p><p>The forestry operation occurring in 2014 has involved a significant and quasi-immediate impact on the SS concentration and flux. As an illustration, the mean SS concentration of the stream was 129 mg/L (outside high-flow periods) the fortnight after the forestry operation beginning, whereas it was only 6.2 mg/L just before. In addition, the forestry operation led to approximately 5 to 6 times larger SS flux than that expected for the July-August 2014 period. The impact on annual SS flux was significant during two hydrological years, with an increase of +100% and +50% for 2014 and 2015, respectively.  This relatively high disturbance is mainly due to the implementation of non-improved stream crossings and skid trails, responsible for the introduction of a huge amount of fine soil particles into the stream. At the opposite, no clear influence of the forestry operation on the bedload export could be observed in 2014 whereas it was 2 times higher than that expected the following year. This delay of the tree harvesting impact on coarse sediment export can be explained by the trapping of bedload upstream of the logs constituting stream crossings during the forestry operation. After the logs removal, the trapped sediments needed several flood events to reach outlet, explaining the delay. Overall, a post-logging recovery time of approximately 10 months can be assumed for the solid exports following the forestry operation.</p>

Changes in soil sulfur constituents in a forested watershed 8 years after whole-tree harvesting

1999 ◽  
Vol 29 (3) ◽  
pp. 356-364 ◽  
Author(s):  
Yimin Zhang ◽  
M J Mitchell ◽  
C T Driscoll ◽  
G E Likens
Keyword(s):  
Stream Water ◽  
Mineral Soil ◽  
Forest Harvesting ◽  
Hubbard Brook Experimental Forest ◽  
Soil Solutions ◽  
Before And After ◽  
Soil Sulfur ◽  
Whole Tree Harvesting ◽  
Whole Tree ◽  
Tree Harvesting

Soil S constituents were evaluated before and after the whole-tree harvesting of Watershed 5 (W5) at the Hubbard Brook Experimental Forest, New Hampshire. Soil solution and stream water concentrations of SO42-, NO3-, and H+ were compared between W5 and W6 (reference watershed). Whole-tree harvesting increased phosphate-extractable SO42- (PSO4) in the E horizon, from 2 mg S·kg-1 soil in pre-harvest to 9 and 10 mg S·kg-1 soil 3 and 8 years post-harvest, respectively. Harvesting increased PSO4 in the Bh horizon from 11 mg S·kg-1 soil prior to harvesting to 20 and 25 mg S·kg-1 soil 3 and 8 years after harvesting, respectively. Temporal patterns in soil chemistry were also reflected in stream SO42-, NO3-, and H+ concentrations. Eight years after harvesting, PSO4 concentrations in the mineral soil increased with elevation. This elevational pattern was likely due to the higher concentrations of SO42- and H+ in soil solutions that enhanced SO42- adsorption at the higher elevations. The high H+ concentrations were attributed to enhanced nitrification and differences in vegetation at upper elevations. The importance of these factors were discussed with respect to the effects of forest harvesting and changes in atmospheric S deposition.

Forest harvesting, resource-based tourism, and remoteness: an analysis of northern Ontario's sport fishing tourism

2005 ◽  
Vol 35 (2) ◽  
pp. 401-409 ◽  
Author(s):  
Len M Hunt ◽  
Peter Boxall ◽  
Jeffrey Englin ◽  
Wolfgang Haider
Keyword(s):  
Forest Management ◽  
Planning Process ◽  
Forest Harvesting ◽  
Hedonic Pricing ◽  
Sport Fishing ◽  
Management Planning ◽  
Revenue Generation ◽  
Forest Management Planning ◽  
Management Schemes ◽  
The Impact

This paper assesses the impact that the routine application of Ontario's forest management planning process has on the revenue generation of sport fishing tourism sites. The analysis employs a hedonic pricing model to examine jointly these effects on revenue for three tourism experiences. These tourism experiences offer different degrees of remoteness, and as a consequence, require different levels of effort and cost to visit. Modelling the relationship between price and attributes of sites such as remoteness permits the analysis to forecast the revenue generation potential of sport fishing tourism sites under a range of forest management schemes. The results show that the extent of forest harvesting had no statistical relationship with prices charged for fishing packages at road-, boat-, or train-accessible sites and a negative but small impact on the prices charged for fishing packages at sites accessible by float plane.

scholarly journals Impacts of Clear Cutting on Diversity of Ground Ants (Hymenoptera: Formicidae) in Pine Plantation Forest in Sukabumi Forest Management Unit, West Java

2021 ◽  
Vol 27 (1) ◽  
pp. 42-49
Author(s):  
A Budiaman ◽  
◽  
N F Haneda ◽  
A I Nugraha ◽  
F Haikal
Keyword(s):  
Forest Management ◽  
Diversity Index ◽  
Pitfall Trap ◽  
Forest Harvesting ◽  
Pine Plantation ◽  
Plantation Forest ◽  
West Java ◽  
Ant Community ◽  
Clear Cutting ◽  
Harvesting Systems

Clear cutting is the main source of timber production of plantation forest management in Indonesia, but this activity disrupts the lives of ground ants. It is rarely known how clear cutting affects the ground ant community in the Indonesian plantation forest. The study aimed to analyze the impacts of clear cutting on the diversity of ground ants in the pine plantation forest of Sukabumi, West Java. The study compared the community structure of ground ants before clear cutting and after clear cutting. Ground ants were collected using a pitfall trap. Trapping of ground ants was carried out six days before the clear cutting and six days after the clear cutting. The ground ants were identified to the morphospecies level and classified into their functional role. The results showed that clear cutting alters the community indices of ground ants. Abundance, morphospecies composition, diversity index, richness index, and evenness index of ground ants after clear cutting was lower compared with those before clear cutting. The clear-felled area due to clear cutting provided favorable habitat for the generalist groups of ground ants, but negatively affected the predator and forager groups of ground ants. These findings can be used as an important factor in the development of environmenllyt-friendly forest harvesting systems in Indonesian plantation forests.

A regional paleolimnological assessment of the impact of clear-cutting on lakes from the west coast of Vancouver Island, British Columbia

2001 ◽  
Vol 58 (3) ◽  
pp. 479-491 ◽  
Author(s):  
Kathleen Laird ◽  
Brian Cumming ◽  
Rick Nordin
Keyword(s):  
Organic Matter ◽  
Species Composition ◽  
West Coast ◽  
Forest Harvesting ◽  
Diatom Species ◽  
The West ◽  
Clear Cutting ◽  
Before And After ◽  
The Impact ◽  
Reference Lakes

The impact of forest harvesting on lakes within the temperate rainforest on the west coast of Vancouver Island was examined in a paleolimnological study of four lakes that had 35–92% of their watersheds progressively clear-cut over a period of 15–30 years (impact lakes) and four lakes that had experienced little or no known anthropogenic disturbance in their watersheds (reference lakes). Changes in diatom species composition and percent organic matter in the 210Pb-dated sediment cores were compared over the last 100 years in each of the impact lakes before and after the onset of forest harvesting, which began in 1950, and before and after 1950 in the four reference lakes. Only one impact lake showed significant changes in percent organic matter. Significant changes (p < 0.05) in species composition following forest harvesting were detected in all four impact lakes and in one of the four reference lakes. However, the changes in diatom species composition following clear-cutting in the impact lakes were small, with changes in the relative abundance of the most common species being maximally 20%, but more typically 3–10%.

The relationship between forest management and amphibian ecology: a review of the North American literature

1995 ◽  
Vol 3 (3-4) ◽  
pp. 230-261 ◽  
Author(s):  
Phillip G. deMaynadier ◽  
Malcolm L. Hunter Jr.
Keyword(s):  
Forest Management ◽  
Prescribed Fire ◽  
Coarse Woody Debris ◽  
Woody Debris ◽  
Forest Harvesting ◽  
Long Term Effects ◽  
Clear Cutting ◽  
Forest Practices ◽  
Logging Roads

Questions about the compatibility of forest harvesting practices and conservation of biological diversity are largely driven by concerns that habitat quality for many species may be degraded in intensively managed forest landscapes. We review the literature on relationships between common forest harvesting practices and the distribution and abundance of amphibians, a group that has attracted considerable attention in recent years because of their potential ecological importance in forest ecosystems and because of reports of widespread population declines. Clear-cut harvesting generally has negative short-term impacts on local amphibian populations, especially salamanders. An analysis of the results of 18 studies that examined the effects of clear-cutting on amphibians yielded a 3.5-fold median difference in abundance of amphibians on controls over clear-cuts. However, research on the influence of forest age suggests that the long-term effects of forest harvesting on amphibians are variable, and for many species these effects can be mitigated if regeneration practices leave adequate microhabitat structure intact. In contrast, long-term effects can be significant in forest plantations, which are often associated with intensive site preparations and stand management practices that modify levels of coarse woody debris and other microhabitats. Other forest practices reviewed for their effect on amphibians include prescribed fire, logging roads, and streamside harvesting. We discuss problems commonly encountered in the experimental design and measurement of forest amphibian populations, including a notable lack of pretreatment data, and outline several aspects of amphibian–forestry relationships in need of further research. Management recommendations relevant to conserving upland and riparian zone amphibian habitat during forest harvesting are offered.Key words: amphibians, clear-cutting, coarse woody debris, forest management, logging roads, plantations, prescribed fire, riparian, succession.

A regional paleolimnological assessment of the impact of clear-cutting on lakes from the central interior of British Columbia

2001 ◽  
Vol 58 (3) ◽  
pp. 492-505 ◽  
Author(s):  
Kathleen Laird ◽  
Brian Cumming
Keyword(s):  
British Columbia ◽  
Organic Matter ◽  
Species Composition ◽  
Sediment Cores ◽  
Forest Harvesting ◽  
Diatom Species ◽  
Clear Cutting ◽  
Before And After ◽  
The Impact ◽  
Reference Lakes

The impact of forest harvesting on lakes within the central interior of British Columbia was examined in a paleolimnological study of six lakes that had 28–82% of their watersheds clear-cut (impact lakes) and four lakes that had experienced no logging in their watersheds (reference lakes). Changes in diatom species composition and percent organic matter in 210Pb-dated sediment cores were compared over the last 80 years in each of the impact lakes before and after the onset of forest harvesting and, in the reference lakes, before and after 1960 (the average onset of logging in five of the six impact lakes) and before and after 1975 (the onset of logging in one impact lake). Significant changes in species composition of diatoms following forest-harvesting activities were detected in four of the impact lakes and three of the reference lakes; however, the changes in diatom species composition were small, with changes in the relative abundance of the most common species being at most 11%. Significant increases in the percent organic matter after 1960 were found in one impact lake and three reference lakes; again these changes were small, with increases of 2–5%.

scholarly journals Searching for Pareto Fronts for Forest Stand Wind Stability by Incorporating Timber and Biodiversity Values

Forests ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 583 ◽  
Author(s):  
Ján Merganič ◽  
Katarína Merganičová ◽  
Jozef Výbošťok ◽  
Peter Valent ◽  
Ján Bahýľ ◽  
...  
Keyword(s):  
Forest Management ◽  
Objective Assessment ◽  
Forest Stand ◽  
Wood Production ◽  
Management Planning ◽  
Clear Cutting ◽  
Pareto Fronts ◽  
Wind Stability ◽  
The Impact ◽  
Regeneration Systems

Selecting a variant of forest regeneration cuttings that would ensure fulfilling multiple, frequently conflicting forest functions is a challenging task for forest management planning. The aim of this work is to present an efficient and complex analysis of the impact of different forest management scenarios on stand wind stability, timber production (economy), and biodiversity of a secondary mixed temperate forest in Central Europe. We evaluated four different harvest-regeneration systems: clear-cutting, shelter-wood, selection cutting, and no-cutting using theSIBYLA growth simulator. We simulated forest stand development over time and applied 450 variants of 4 harvest-regeneration systems. The selected outputs from the simulator were used as indicators of the fulfilment of wood-production and non-wood-production functions. The calculated indicators were forest stability (height/diameter ratio), economic efficiency (soil expectation value, SEV), and tree species diversity (Shannon index). These indicators were used as inputs for multi-criteria a posteriori decision analysis using the weighted summation method and Pareto fronts. The results revealed substantial trade-offs among the three investigated criteria. The decision space was highly sensitive to their weighting system and included all regeneration systems. The Pareto fronts for wind stability revealed that the maximum stability could be achieved with shelter-wood based on target diameter. This variant, however, fulfils the other two examined functions only to a limited extent (SEV and diversity only to 9% and 27% of their absolute maxima). Other similar variants achieve high stability by sacrificing the diversity and increasing SEV, simultaneously. If a high diversity level is favoured, optimal stability could be achieved by the selection system. The proposed approach enables objective testing of a large number of variants, and an objective assessment of stand management planning since it provides us with the complex multi-dimensional picture about the impact of criteria weights on the selection of optimal variants, and the relative fulfilment of individual criteria.

scholarly journals Reduced-Impact Logging Maintain High Moss Diversity in Temperate Forests

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 383
Author(s):  
Enrique Hernández-Rodríguez ◽  
Luis H. Escalera-Vázquez ◽  
Deneb García-Ávila ◽  
Miguel Montoro Girona ◽  
Eduardo Mendoza
Keyword(s):  
Community Structure ◽  
Forest Management ◽  
Habitat Degradation ◽  
Alpha Diversity ◽  
Biodiversity Loss ◽  
Forest Harvesting ◽  
Annual Rainfall ◽  
Promising Tool ◽  
Impact On Biodiversity ◽  
The Impact

Forestry harvesting represents an important economic activity around the world. Habitat degradation due to forest harvesting contributes to biodiversity loss; therefore, it is necessary to implement logging management aimed at reducing its impact. Forest management by reduce-impact logging (RIL) involves cutting trees following regulations focused on diminishing the impact on biodiversity by following harvesting plans based on forestry inventories and participation of trained workers. In Mexico, RIL is applied mainly in temperate habitats and its effectiveness has been assessed based on vascular plants. In this study, we analyzed the diversity and community structure of terrestrial and epiphytic mosses in managed (sites number = 3) and conserved (sites number = 3) sites in the temperate forest of Sierra Juárez, Oaxaca, Mexico. Likewise, we evaluated the potential function of mosses as indicators of habitat degradation. Environmental variables were also quantified at local (canopy coverage, altitude, daily temperature, and light) and regional (total annual rainfall, orientation, and slope) scales to evaluate potential relationships with the community and species diversity. We documented 70 mosses species with a diversity (alfa, beta) and community structure similar between managed and conserved sites. For terrestrial mosses, we found marginal differences in their communities, likely related to species coverture variation in managed sites. The diversity and community structure epiphytic mosses were not statistically different in managed and conserved sites. Only the daily variation in light intensity was positively related to the variation of alpha diversity of epiphytic mosses. The species Dicranum sumichrastii Duby and Leptodontium viticulosoides (P. Beauv.) Wijk & Margad. can be considered as ecological indicators for conserved and managed sites, respectively, likely due to their relationship with light and humidity conditions. Our results suggest that that forest management by RIL could be considered as a promising tool to balance timber production and moss diversity.

Predicting the effects of different harvesting regimes on forest floor dynamics in northern hardwoods

1978 ◽  
Vol 8 (3) ◽  
pp. 306-315 ◽  
Author(s):  
John D. Aber ◽  
Daniel B. Botkin ◽  
Jerry M. Melillo
Keyword(s):  
Organic Matter ◽  
Forest Management ◽  
Computer Model ◽  
Forest Floor ◽  
Nitrogen Availability ◽  
Forest Harvesting ◽  
Northern Hardwoods ◽  
Clear Cutting ◽  
Short Rotation ◽  
Harvesting Intensity

The effects of different intensities of forest management on forest floor organic matter and nitrogen dynamics in northern hardwoods were simulated with a computer model built from the extensive data base of the Hubbard Brook Ecosystem Study. Three cutting intensities and three rotation lengths were tested. In all cases, both nitrogen availability and forest floor organic matter declined for 15–30 years following cutting and required 60–80 years to recover to precut levels. Rotation length had a much greater effect on the forest floor than harvesting intensity with short-rotation (30-year) complete forest harvesting causing the greatest reduction in both biomass and nitrogen availability. Average forest floor biomass under this treatment was reduced to roughly one-half of that under clear-cutting (90-year rotation).

scholarly journals CHANGES IN MACRONUTRIENT CONCENTRATIONS IN SOIL SOLUTION FOLLOWING REGENERATION FELLING IN PINE AND SPRUCE STANDS: WHOLE-TREE HARVESTING VERSUS STEM-ONLY HARVESTING

2018 ◽  
Author(s):  
Ivars KLAVINS ◽  
Arta BARDULE ◽  
Zane LIBIETE
Keyword(s):  
Forest Management ◽  
Soil Solution ◽  
Tree Species ◽  
Peat Soil ◽  
Site Type ◽  
Logging Residues ◽  
Whole Tree Harvesting ◽  
The Impact ◽  
Whole Tree ◽  
Tree Harvesting

While conventional forest management in boreal and hemiboreal conditions has traditionally been targeted to use and enhance mainly provisioning services like timber production, the main goal of national and European forest policy is to ensure sustainable management of European forests in all aspects. Regeneration felling is a major disturbance in boreal and hemiboreal forests resulting in significant increase of organic matter on the forest floor in the form of logging residues (bark, small branches, tree tops) and severed roots (in case of stump harvesting), and can increase the risk of nutrient leaching. Recently, concern about the effect of forest management impact on macronutrient leaching potentially decreasing nutrient availability for the next forest generations and causing deterioration of water quality has been raised. In 2011, three objects to study the impact of different intensity regeneration felling (stem-only harvesting and whole-tree harvesting) were established in scientific research forests in Kalsnava forest district, eastern part of Latvia. Two sites were located on mineral soils (Myrtillosa and Hylocomiosa site type, dominant tree species Pinus sylvestris L.) and one on drained peat soil (Oxalidosa turf. mel. site type, dominant tree species Picea abies (L.) Karst.). Felling was performed in early spring 2013 with harvester, timber was extracted and logging residues were removed with forwarder, following “business as usual” principle. Soil solution samples were collected once or twice a month in 2012, 2013, 2014, 2015 and 2016. This study presents trends of pH and macronutrient (NO3--N, PO43--P, K) concentrations during five years – one year before harvesting and four years following harvesting. In general, significant forest management impact expressed as increase of macronutrient concentrations in soil solution was detected in the second and third year after harvesting, but in the fourth year concentrations started to decrease again.

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