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1.
Forest rehabilitation activities within centrally controlled state-owned forests in Ethiopia could not deliver communities with increased income. A study aiming to assess the benefits of forests for smallholder farmers whose land falls close to the state forest was conducted in Hugumbirda and Endedo kebele, two villages located adjacent to the Hugumbirda forest. Semi-structured questionnaires were used to collect data from 251 randomly selected households living near or adjacent to the state forest. A logit model was used to analyze factors affecting household’s willingness to scale up forests at the communal level. Most of the respondents living near or adjacent to the national forest were found to be dependent on the forest for fuelwood and therefore energy, timber products, and farming equipment. Furthermore, households were found to perceive that communal intervention management is a significant factor in attempts to further scale up forests. Scale-up of forests at the community was one option to enhance the vegetation cover and therefore increase primary production by promoting infiltration and decrease evaporation and runoff water. Finally farmers have suggested the state forest should be devolved to the community to improve the current level of forest contributions to the livelihood of smallholder farmers.  相似文献   

2.
Accurately estimating forest net primary productivity (NPP) plays an important role in study of global carbon budget. A NPP model reflecting the synthetic effects of both biotic (forest stand age, A and stem volume, V) and climatic factors (mean annual actual evapotranspiration, E) was developed for Chinese pine (Pinus tabulaeformis) forest by making full use of Forest Inventory Data (FID) and dynamically assessing forest productivity. The NPP of Chinese pine forest was estimated by using this model and the fourth FID (1989–1993), and the spatial pattern of NPP of Chinese pine forest was given by Geography Information System (GIS) software. The results indicated that mean NPP value, of Chinese pine forest was 7.82 t m−2·a−1 and varied at the range of 3.32–11.87 t hm−2·a−1. NPP distribution of Chinese pine forests was significantly different in different regions, higher in the south and lower in the north of China. In terms of the main distribution regions of Chinese pine, the NPPs of Chinese pine forest in Shanxi and Shaanxi provinces were in middle level, with an average NPP of 7.4 t hm−2·a−1, that in the southern and the eastern parts (e.g. Shichuang Hunan, Henan, and Liaoning provinces) was higher (over 7.7 t hm−2·a−1), and that in the northern part and western part (e.g. Neimenggu and Ningxia provinces) was lower (below 5 t hm−2·a−1). This study provides an efficient way for using FID to understand the dynamics of foest NPP and evaluate its effects on global climate change. Foundation item: This study was supported by the National Natural Science Foundation of China (Nos. 30028001, 49905005), National Key Basic Research Specific Foundation (G1999043407); the Chinese Academy of Sciences (KSC2-1-07). Biography: ZHAO Min (1973-), female, Ph. D. in Laboratory of Quantitative Vegetation Ecology, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, P. R. China. Responsible editor: Zhu Hong  相似文献   

3.
In comparison with integrated pest management and chemical control, the authors put forward a new strategy of forest pest control, named ecological control of forest pest (ECFP). This paper reviewed the development history, summarized the concept and principles of ECFP, discussed the technology and methods of ECFP, and evaluated the ECFP and its application conditions.  相似文献   

4.
Changbai Mountain forest area is not only is a national timber base but also a green ecological defense for Songliao Plain of NE China. The Natural Forest Protection Project of this area has an important bearing on the social and economic sustainable development of Jilin Province or even the whole forest area in NE China. This paper summarized general conditions of natural forest in Changbai Mountain state-owned forest area and put forward six problems need to be urgently solved and five strategic suggestions on natural forest protection and sustainable management.  相似文献   

5.
In the aftermath of a hurricane in Sweden that felled some 250 million trees, the Swedish Forest Agency advised forest owners to reduce forest vulnerability by planting different tree species. This paper analyses why forest owners failed to heed the Forest Agency's recommendation, thereby reproducing a forest vulnerable to storms. This paper focuses on the deliberations and risk evaluations of forest owners when deciding which tree species to plant. The analysis identifies three main categories of reasoning that guided the forest owners' decision-making process: short-term economic reasoning caused by the pressing situation they faced; an understanding of windstorms as natural catastrophes that are impossible to influence; and the uncertainties associated with alternative forest management practices. Furthermore, given their risk-averse strategy, their approach to understanding and coping with uncertainty was crucial in determining their responses. This paper concludes that the forest owners primarily employed experience-based, practical and embodied knowledge, implying that abstract risks and theoretical knowledge regarding future developments were not deemed relevant. An additional conclusion is that even if a huge storm felling shows the need to change forest management practice, it does not provide the most favourable social conditions for achieving change.  相似文献   

6.
To study whether, why, and how forestry decision-makers in Southeastern Norway adapt to climate change, we conducted a series of semi-structured interviews in focus groups consisting of non-industrial private forest owners, forest managers, and forest advisors. Our results show that a majority of the participants believed in climate change as a phenomenon, and had experienced events or observed changes that they attributed to climate change. However, we found little evidence of concern regarding climate change impacts on forest ecosystems and forestry among the participants. Instead, the majority regarded climate change more as an opportunity for the Norwegian forest-based sector than a threat. A minority had implemented proactive practices motivated by climate change but in all but one case, the adjustments were adaptation of forest infrastructure. In general, the participants agreed that the uncertainty associated with the effects of climate change and the (economical) uncertainty associated with adaptation of forest ecosystems were too large to change forest management practices at present. However, many participants, in particular the managers, are already adapting in response to experienced problems, such as increased frequency and duration of periods with low carrying capacity of the ground implying reduced or no accessibility within and to stands.  相似文献   

7.
This article is a reanalysis of interviews conducted in 2006 and 2009 with forest owners and their families. It gives a complementary interpretation of the forest owners’ decisions to replant spruce despite strong criticism from the public and from experts. The interviewees’ visual conception of the forest landscape and how they relate to it through their forestry practices is analysed. The results show that the forest owners prefer landscapes that are clean and tidy, showing characteristics indicative of forestry skills. At the same time they remain sensitive to the existence of other value systems among the public. The forest owners’ way of looking at the forest was characterized by the fact that they worked with the landscape; for them the forest is not only a symbolic project linked to identity, but also a taskscape, an imprint of performed work. In the discussion, the forest owners’ aesthetic value system is discussed and a supplementary answer is given to why forest owners refused to heed warnings about the replanting of spruce, a question that earlier studies generally attributed to forest owners’ wish to avoid short-term economic risks.  相似文献   

8.
In the recent 20 years, it is a trend that forest will be distributed to villagers to manage in the world. Also in China, “forestry three determinations” has been carried out since 1980, and many new forestry devolutions have been put forward to and come into being. To face the fact of overusing up natural forest to result in the deterioration of ecology environment, the strategy of natural forest protection project (NFPP) is raised after the heavy flood in 1998. Now, it is paid close attention to systematically study to carry out the strategies of NFPP in collective forest area, especially in the community of minority nationalities. Based on the case of forest resource management in Datu Miao Village, the experience of its forest management in the past is analyzed and the strategies of NFPP in collective forest area are put forward. Foundation item: This project is a part of research project “forest devolution management of IFAD/CIFOR” Biography: L{upuo} Ming-can (1961-), maie, associate professor, vice director of post-graduate school of Southwest Forestry College, Kunming 650224, P.R. China. Responsible editor: Song Funan  相似文献   

9.
IntroductionForestisakindofmulti-function'resourcethatcanbesustaininglyutiIized,butsomeprobIems,suchasinsufficiencyoftimberyieId,soiIerosion,cIimateim-baIanceinpartdistrictetc.,oftenarousedbecauseofincorrectuseandmanagementofnaturalresources.InordertodevelopthefOrestry,IotsoffOrestrypoIi-cieshavebeenissuedandcarriedout.V8rioustypesofforestresourcesmanagementhavebeenaroused,especialIycollectiveforestareasinsouthChina.However,whydiff6rentefficiencies,good,badandworse,eventoresultinthedecrea…  相似文献   

10.
Forest certification can be conceived as one of many rapidly growing non-state market driven (NSMD) modes of governance. The environmental effectiveness of forest certification is oftentimes evaluated by indicators such as stringency of standards, degree of participation by key stakeholders, certified area, etc. In political science, forest certification as an NSMD governance arrangement is usually evaluated in terms of the quality of the decision-making procedures (input legitimacy) rather than for its problem solving capacity, i.e. its environmental performance or effectiveness. We conceptualize environmental effectiveness as a function of a standard's environmental stringency and the area covered by the standard, the latter dependent on the degree of social acceptance. Accordingly, the environmental effectiveness of different certification schemes ought to be evaluated taking both the standard stringency and the area certified into account. The forest certification process in Sweden illustrates how forestry history and regional differences affect the development, acceptance and adoption of different certification schemes. Industrial and Northern forestry owners favour the NGO led Forest Stewardship Council (FSC) standards whereas Southern small-scale private forest owners preferred to develop an alternative scheme the Programme for Endorsement of Forest Certification (PEFC). We demonstrate that there is a bifurcated geographical coverage of the two certification schemes along a north–south divide coupled with a similarity in standard stringency and a high degree of acceptance in their different areas of dominance. Both forest certification schemes display a similar degree of environmental effectiveness — but in different parts of the country and for different types of ownership.  相似文献   

11.
The Great Xing’an Mountains boreal forests were focused on in the northeastern China.The simulated future climate scenarios of IPCC SRES A2a and B2a for both the baseline period of 1961-1990 and the future scenario periods were downscaled by the Delta Method and the Weather Generator to produce daily weather data.After the verification with local weather and fire data,the Canadian Forest Fire Weather Index System was used to assess the forest fire weather situation under climate change in the study region.An increasing trend of fire weather severity was found over the 21st century in the study region under the both future climate change scenarios,compared to the 1961-1990 baseline period.The annual mean/maximum fire weather index was predicted to rise continuously during 2010-2099,and by the end of the 21st century it is predicted to rise by 22%-52% across much of China’s boreal forest.The significant increases were predicted in the spring from of April to June and in the summer from July to August.In the summer,the fire weather index was predicted to be higher than the current index by as much as 148% by the end of the 21st century.Under the scenarios of SRES A2a and B2a,both the chance of extremely high fire danger occurrence and the number of days of extremely high fire danger occurrence was predicted to increase in the study region.It is anticipated that the number of extremely high fire danger days would increase from 44 days in 1980s to 53-75 days by the end of the 21st century.  相似文献   

12.
Above ground dry mass production and N accumulation on an areal basis in stems, branches and needles as well as in litterfall in a Norway spruce stand in south Sweden treated with unlimited availability of water and nutrients (fertilisation with irrigation) or of water (irrigation) during a 6 year experimental period are presented. Fertilisation was made in liquid form on a weekly basis during the vegetation period with 100 kg N ha−1 year−1 during each year. The fertiliser also included a balanced composition of P, K, Ca, Mg and S as well as of micronutrients. Irrigation was carried out as soon as a 20 mm water storage deficit developed. It is concluded that there is a large potential to improve Norway spruce production through liquid fertilisation with irrigation. Stem and branch production of Norway spruce was almost doubled due to this treatment. Also, stand needle dry mass and litterfall were markedly increased in comparison with the control. Water and N availability were the two most limiting growth factors. During the experimental period, irrigation had a greater effect on growth than N addition. The gross N uptake increased by 450 kg ha−1 as a result of 600 kg ha−1 fertiliser addition. Needle retention was increased for irrigated trees but needle litterfall remained unchanged. Changing the forest management of Norway spruce to intensive cultivatation results in transitional carbon sequestration in both stand and soil compared with an untreated ecosystem. The largest long-term environmental value is, however, achieved if this cultivated renewable biomass is used as a substitute for fossil fuels. Wood utilisation options of intensively cultivated Norway spruce are discussed.  相似文献   

13.
The group of female forest owners is growing across Europe and currently estimated to be about 30% of all private owners. This new category of forest owner merits a closer look. By introducing a gender perspective across three different research frameworks, this paper substantiates that gender matters in forest ownership, management, operations, and the understandings of these three aspects. Where gender-disaggregated data is available, and gender is assessed as an empirical variable, we find the differences in numbers between male and female forest owners in most countries. By adding the concept of gender as a relational and structuralizing category, we demonstrate that gender structures affect, for example, actual behavior of female and male forest owners and the self-evaluation of forestry competence. Further, when considering gender as a meaning category we explore how meaning produces behavior and behavior produces meanings, and how both shape institutions and natural and artificial matter. Here forestry competence is the applied example. To further increase the knowledge on new forest owners, we recommend (i) fellow researchers in the field to assume that gender matters and design their empirical studies accordingly and (ii) policy-makers to guarantee access to gender-disaggregated data in official registers and statistics.  相似文献   

14.
Using plant community analysis methods, we analyzed the floristic characteristics, species composition, community structure, population structure, and spatial distribution patterns of a Betula dahurica forest on the “1238” mountain of Badaling in Beijing, China. The results show that: 1) There are 33 plant species in the B. dahurica community, including 18 woody plant spe- cies. The B. dahurica forest is a monodominant community with 75.9% dominance. 2) Based on diameter at breast height (DBH) size class distribution, the population structure of B. dahurica and Acer mono—two heliophyllous and pioneer tree species—is cascade-type, with both in an increasing stage. The population structure of Tilia mandshurica and T. mongolica, two shade-tolerant tree species, is inverse-J type, and they have more young seedling individuals and regenerate more stably. They are associated species of the pioneer tree species. The population structure of Quercus mongolica, as the associated species of climax species in the community, is sporadic, and its regeneration is fluctuating and random. Fraxinus rhynchophylla is a shade-tolerant tree species which has a unibar population structure and climax characteristics of pioneer tree species. The relative frequency of young seedlings reached 0.4. 3) The dominant species B. dahurica is still in an increasing stage, and the regeneration of other species is steady or partly influences the community, putting the community in the pioneer species stage. From the population structure and distribution frequency of F. rhynchophylla, the B. dahurica forest will approach to a climax state in the future.  相似文献   

15.
The aim of this paper is to analyze the level of dependency of rural households on forests, based on the economic status of the households and the property regimes of forests. The analysis of household-level dependency suggests that large numbers of rural households are benefiting regularly from their community forests. Out of three forest property regimes examined, community forests were found to be the most prominent sources for supplying forest products to local households. Analysis of the degree of forest-products dependency and the economic status of households shows that the low economic status households rely more on the community forest than the economically better-off households. In addition, a 2 analysis indicates that the economic status of households affects the degree of forest-product collection activities. The results show three types of property regime with respect to forest management in Chitwan. Each regime holds its own ownership rights, which control the harvesting of forest products and provides incentives to the local households.  相似文献   

16.
We estimated the probability of enrollment and factors influencing participation in a forest stewardship-type program, Minnesota's Sustainable Forest Incentives Act, using data from a mail survey of over 1000 randomly-selected Minnesota family forest owners. Of the 15 variables tested, only five were significant predictors of a landowner's interest in enrolling in the program: compensation amount, intention to obtain a forest management plan, opposition to the program's land covenant, prior awareness of the program, and total acres of forest land owned. The estimated median minimum compensation required was approximately $24 per acre per year. One-fourth of the survey respondents were undecided about whether they would participate in the stewardship program, suggesting there may be potential to capture additional interest and participation. Marketing efforts to raise program awareness, increasing annual stewardship payments, and eliminating the land covenant are likely to be effective strategies for increasing program participation.  相似文献   

17.
From the biological point of view the value of autotrophy plant association is determined by the carbon fixation and the carbon cycle. Among the plant associations of Hungary, forest has the largest biological carbon fixation and carbon cycle.In general, the annual water cycle is the key factor in the organic material production of the Hungarian forests. The most intensive water consumption and organic material production take place from May till July, which period is named main water consumption and respectively main growing period. In Hungary the categories of the forest climate are characterized by main tree species and based on the characteristic meteorological data (Jaro and Tatraaljai, 1985). In Hungary the forest area covered by stand is 1,650,000 hm2. Beech forest climate covers 8% of the forest area, hornbeam-oak forest climate covers 22%, sessile oak-Turkey oak forest climate covers 48% and forest steppe climate covers 22%. Partly in the frame of ICP-Forests, the Department of Ecology in the Forest Research Institute carries out long term, complex ecophysiological investigations on several sample plots (so-called basic plots) throughout the whole country. The organic material production (growth), the nutrient and water cycle, the measurements of air pollutants and meteorological parameters, as well as chemical analyses are all part of the investigations. As a comparison the figure of two basic plots (Sopron-Piispokladany) shows the water cycles of a good growing beech stand in beech climate and a weak pedunculate oak stand in forest steppe climate in the hydrological year of 2001-2002. In the Hungarian forest 60%-70% of the precipitation is used for interception, evaporation, and in the vegetation season, for the transpiration both in beech and forest steppe climate. From other point of view, only 30%-40% of the open air precipitation infiltrates into the soil and can be utilized by the forest.  相似文献   

18.
The paper discusses methods to compensate for the costs incurred in the supply of forest ecological services (FES), i.e. government dominated and market-based instruments as well as progress made so far in China. Factors which constrain the supply of these services and potential policy improvements are presented.  相似文献   

19.

? Context

Two-thirds of Britain’s forest area is privately owned. Thus, understanding private forest owners and managers, and their attitudes to uncertainty and change, is essential for the success of climate change adaptation policies.

? Aim

The aims of this study are to (1) assess how beliefs in climate change in the private sector have influenced forest management practices; (2) identify constraints related to changes in species choice and silvicultural systems; (3) analyse the implications for implementing climate change policy in forestry.

? Method

Semi-structured interviews with key informants who provide advice to, or manage woodlands in, the private forest sector in north Wales.

? Results

Woodland managers and some advisers are not generally convinced of a need to adapt. They feel the future is uncertain, more usually in relation to tree disease than to climate change itself. Species choice is the principle focus of adaptation activities and reveals a deep divide in opinion. Commercial advisors look to new exotics but are inhibited by absence of markets, while small-scale owners rely more on native genetic diversity.

? Conclusions

Findings that are likely to apply widely include: the influential role of forest agents in forest management decisions including species choice; lack of confidence in climate change predictions, and in markets; more immediate concerns about tree pests and diseases; demand for leadership from the public sector, and for engagement amongst the private sector. Further research is needed across a wider area to test the variability in relationship between attitudes and behaviours, and local conditions including climate change predictions.  相似文献   

20.
The interest intermediation system has always attracted the attention of forest policy scientists. However, research on this subject has focused on the national level, despite the fact that forest issues are increasingly prominent on international and European agendas, both in the EU and the Pan-European Process on the Protection of Forests in Europe. Accordingly, the impacts of the globalisation and Europeanisation of forest policy and the peculiarities of multi-level policy processes have not been sufficiently taken into account. This article examines how international forest politics and the integration of national actors in the EU multi-level system of joint decision-making affect national actor constellations. To this end, I draw on the advocacy coalition framework to depict the Austrian forest policy network and its actors’ dispute on forest certification, as well as on hypotheses and empirical results of multi-level governance scholars and on my own preliminary results to investigate the likely effects of the evolving EU forest policy. The discussion provides some hypotheses and indications that national forest policy networks might be subject to significant change.  相似文献   

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