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三江源草地生态保护中牧户的福利变化及补偿研究
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摘要
三江源是我国江河中下游地区和东南亚国家生态环境安全和区域可持续发展的生态屏障,但在近几十年的全球气候变化和人类活动的双重影响下,三江源区源区草地植被退化退化严重已经使源头水源涵养能力急剧减退,并已直接威胁到了长江、黄河流域、乃至东南亚诸国的生态安全,国家自2005年始在三江源区大规模实施生态移民和限制放牧等工程以缓解草地退化的格局、并逐渐恢复和保护三江源生态环境。三江源生态保护及补偿工作至今已7年有余,源区草地植被和湿地生态环境得到了一定程度的恢复和改善,但与此同时也出现了一些影响生态经济和社会和谐、稳定、健康发展的问题,其中以依赖当地草地资源而生存、三江源区的最主要经济主体——牧户的福利和发展是尤为重要且最紧迫的问题之一。三江源生态保护工作的开展离不开牧户的积极响应、支持和参与,而牧户愿意参与生态保护计划的前提是牧户的福利不下降或得到科学合理的补偿,在补偿不到位或补偿机制不健全的情况下,牧户参与三江源生态保护行为将极有可能使牧户的经济收入和生活受到很大的影响,许多牧户的生活甚至陷入贫困化的威胁,既不符合公平原则和可持续发展原则,又容易挫伤牧户参与生态保护行为的积极性,影响三江源草地生态恢复及保护的效果和速度。因此,研究牧户在三江源生态保护中的福利内涵及变化情况,以牧户福利得到改善为目标制定补偿标准和调整补偿机制,激励牧户继续参与生态保护行为,对最终持续推进三江源区中后期的生态保护开展和维护社会经济可持续发展至关重要。本文结合福利经济学理论和千年生态系统报告的核心思想,界定了生态系统服务变化中人类福利的内涵,并对三江源草地生态保护中牧户的福利变化进行了评价和分析,在牧户福利优化的基础上核算了三江源草地生态保护过程的补偿标准,并以行政区划为界线提出了各县的补偿次序、不同补偿性质的补偿标准和不同的发展保护模式。
     本文结合森的能力框架探讨了福利的内涵,界定了生态系统服务及其功能对人类福利的内涵,指人类在生态系统生产和利用中的自由选择和能力,而贫穷指可行性能力和发展的受限,即福利的下降。生态系统的退化和破坏将严重威胁人类福利(尤其是穷人的福利),关注强烈依赖于生态系统服务的贫困人群的福利,并科学有效的实施生态补偿通过外部效应内部化,以激励生态保护的行为进而实现生态保护和人类福利改善的双赢。本文以三江源草地生态保护中的牧户为研究对象,分别以参与三江源草地的生态移民和参与草地限制放牧的牧户为例,分析了不同类型的牧户参与生态保护行为中的生活、健康、安全、社会关系、环境、社会适应、自由、生活实现和幸福等9项功能的状况,并结合马斯洛需要层次理论确定了不同层次功能的权重,并认为福利各功能之间是递进式的即低阶功能的实现程度会促进高阶功能的实现,最后分别评价了三江源移民和限制放牧的牧户在参与生态保护行为前后的福利变化情况。研究表明,三江源移民在参与生态保护行为后福利水平下降,主要是由于失去草地使用权后导致收入的下降、资源使用和参与环境管理的自由受到严重的影响、移民以前在草地放牧生活中形成的地缘和血缘关系被割裂使社会关系的支持功能下降、移民的生存技能未得到提升进而影响到了如社会适应、生活实现和幸福感等高阶功能的实现,使移民的福利功能下降;牧户参与限制放牧后的福利水平略有提升,是由于牧户限制放牧后虽然使其收入水平有了一定的下降,但居住条件和医疗保障等各功能的提升使生活、健康、安全和社会关系、坏境等各功能均得到了很大程度的提升、并且牧户使用草地的权益比移民限制程度小、并且牧户并未大规模迁徙因而社会适应能力受损不明显,使限制放牧牧户的福利水平略有提升。可见,牧户参与三江源草地生态保护行为使其收入水平受到了一定的影响,当收入水平能维持日常的生活所需时,牧户的其他福利功能的改善能使牧户的福利水平得到一定程度的提高;但当收入水平下降显著,而牧户的其他生活能力未得到提高和其他福利功能尚不能实现时,牧户的福利往往会明显的下降,甚至陷入贫困化。因此,参与生态保护行为中牧户的收入能力和自然资源产权承载的其他福利功能都是牧户福利的重要组成部分,在补偿过程中均应该被重视、被补偿,尤其应该在低阶福利功能如收入被补偿的基础上,关注自由和生活实现等高阶功能的补偿和提升。
     本文通过三江源生态保护中牧户的福利均衡分析发现,要使牧户的福利水平不下降或改善牧户的福利水平,则必须提高补偿标准和减少牧户对草地资源的依赖性。因此,在提高补偿标准的基础上,更要考虑如何通过区域的经济发展方式转变和结构调整来创造就业机会,通过提高牧户的文化教育水平和层次、加强职业技能培训等提升牧户的就业技能和可行性能力,让牧户通过自身的努力和政府的帮助通过非放牧式的生计方式转变和其他多种途径经营来获取经济收入,获得比放牧收入更高的收入才有可能会逐渐带动牧户逐渐减少和放弃对草地的依赖和利用,从而从根本上实现草地生态环境的保护,进而形成牧户的可行性能力的提高和生态环境改善的互相促进的良性循环。
     本文通过文献分析认为生态补偿是贫困减缓的重要机制,在生态保护行为意愿和福利损失的基础上制定生态补偿标准,明确界定利益相关方和区域的生态保护责任,构建科学的生态补偿机制才能实现福利均衡,才能引导牧户实现主动参与式保护,才能真正实现生态保护——人类福利提高——可持续发展的多赢局面。本文基于三江源地区2002-2010年的气候因子数据,模拟了近十年以来三江源草地生态保护后的植被覆盖度(NPP)变化情况,并进一步核算了自2005年保护以后三江源各县的草地生态系统服务功能价值及增加情况;研究表明,三江源草地的生态服务功能在2005—2010年表现出先缓慢下降而后逐渐上升的趋势,说明三江源草地生态恢复及保护行为在逐渐起效,体现出三江源草地生态由降低退化的速度演变为生态环境逐步恢复及改善的趋势特征;三江源草地生态保护效益增加值在区域上表现出极大的差异性,海拔比较高、气候比较恶劣和退化严重的区域草地生态恢复比较慢、保护效益增加值比较小,增加幅度最大的是甘德县,单位面积草地生态服务价值增加了1.086万元/km2,唐古拉乡和曲玛莱县的草地生态服务价值增加量分别为0.221万元/km2和0.637万元/km2,增加量最小;自2005年保护以来的5年中,三江源区每单位面积草地的保护效益增加值为0.902万元/km2,并拟将各县的草地生态保护效益增加量作为激励三江源牧户主动参与生态保护的奖励性补偿标准。
     本文分别计算了三江源牧户参与生态保护行为中,因草地资源使用权被禁止或被限制而在实际和理论上损失的经济收入(机会成本)和各项参与成本。牧户的福利损失是理论上应该补偿给牧户以保持福利均衡的,三江源移民和牧户实际机会成本损失价值分别为4.2846万元/户和1.6478万元/户;基于草地理论载畜量而核算得到的三江源牧户平均参与成本为3001.63元/hm2,平均机会成本损失为750.458元/hm2,由于各县的海拔高度、草地退化程度和交通通达度不同而使三江源各县的参与成本和机会成本存在比较大的差异,因此补偿的过程中应该被补偿的参与成本内容和标准各不相同。
     本文基于消费者剩余理论和外部性理论,结合牧户的参与生态保护行为的意愿,研究了牧户在参与生态保护行为中为避免使福利受损而应该获得的最小受偿意愿额度,并作为牧户参与生态保护行为保持福利不下降的参考补偿标准。研究表明,三江源牧户中约66.7%的牧户表示愿意参与生态保护行为,牧户参与保护行为后福利水平至少不变或不下降是牧户参与保护意愿概率提高的重要保障,区域工作机会较多、生计方式比较丰富和生态保护外部性认知水平高的牧户参与生态保护响应的意愿较高。可见,让牧户分享生态保护的外部性效益、促进牧户生计多样化水平和提升牧户的就业水平让牧户的收入水平得以保障并提高,是促进牧户的保护积极性的关键。三江源生态移民基于平均值和中位值的受偿意愿额分别为1.2886万元/年·户和2.05668万元/年·户,限制放牧的牧户基于平均值和中位值的最小受偿意愿额分别为0.6733万元/年·户和1.14316万元/年·户,移民因草地生态保护行为中草地使用权被限制程度大(被禁止)和损失比较高,因此移民的受偿意愿高于限制放牧的牧户。
     本文以三江源的行政区划为界线,基于草地生态恢复效益和补偿效率计算了补偿优先度,结合三江源草地的生态退化恢复难度而划分了补偿区域的优先次序,并探讨了各区域的补偿标准和发展模式。将保护效益增加最明显和优先度最高的三江源杂多县、达日县和玛多县列为优先补偿区,该区域通过生态移民来达到生态保护的目的,而移民得到最高的激励性质的补偿标准,即按照生态保护效益增加值与参与成本之和来补偿,同时应该参照移民的最小受偿意愿额2.05668万元/年·户;将保护优先度最低和恢复难度最大的唐古拉乡、称多县和治多县划为重点保护补偿区,同样通过生态移民来保护,并按照生态保护效益增加值和实施成本作为鼓励兼补偿性质的补偿标准,并使补偿标准参照移民的WTA;将优先度次之的久治县、班玛县、曲玛莱县和玉树县列为次级补偿区,实施限制放牧,并按照生态保护效益增加值与机会成本之和来补偿牧户的福利损失,并使补偿标准参照牧户的WTA即1.14316万元/年·户;将保护效果疲软的其他区域列为潜在补偿区域,可以在限制放牧的过程中适当发展绿色经济,在资金充足的情况下按照生态保护效益增加值与交易成本之和来补偿,以改善牧户福利和实现生态经济可持续发展。
     根据三江源牧户福利优化为目标,提出了应该对牧户在三江源生态保护中的经济收入损失和各种福利功能进行补偿,并核算了三江源区域可持续的、激励性质的补偿标准,以期望通过提高补偿标准和实施差异化的补偿,在改善牧户福利水平的基础上,提高牧户主动参与生态保护的积极性,实现三江源保护区生态经济的全面可持续发展,实现社会福利最大化。但在今后考虑如何提升牧户的可行性能力和加强公众参与环境管理,并构建整个三江源源头和三江流域的生态补偿机制以解决补偿资金不足和实现福利均衡,是实现可持续保护和区域间平衡发展的重要举措,也是进一步的研究方向。
Sanjiangyuan region is an ecological barrier of the ecological environmental security and regional sustainable development in the middle and lower reaches of Chinese rivers and south-east Asian nations, however in recent decades, grassland vegetation of Sanjiangyuan region serious degraded by the twofold influences of the global climate change and human activities,which led to nourishing capacity of source water diminished sharply, and which directly threatened the environmental security of the Yangtze river, Yellow River basin and south-east Asian nations. Since2005, Chinese government began to implement the ecological migration and limiting grazing grassland in Sanjiangyuan region to alleviate the situation of grassland degradation, and gradually restore and protect the ecological environment. The ecological protection and compensatory work for Sanjiangyuan region has been carried on for more than7years, the grassland vegetation and the marshy ecological environment have acquired recovery and improvement in some degree, but at the same time, some problems have appeared that impact ecological economy and social harmony, stability and healthy development, which depend on the local grassland resources to live, the main economic subject of Sanjiangyuan region-herdsman, their well-being and development is one of the most pressing problem. The ecological protection of Sanjiangyuan region depends on herdsman's active response, support and participation, however the herdsman willing to participate in ecological protection plan provided that the well-being of the herdsman does not drop or get scientific and reasonable compensation. In the case of the compensation is not enough or the compensation mechanism is not perfect, herdsman participate behavior of the ecological protection will likely reduce their income and greatly impact their life, many herdsman will even face to threat of poverty, these don't accord to fair and sustainable developmental principle, and it is easy to frustrate enthusiasm that herdsman participate the ecological protection program, even affect the speed and efficiency of grassland ecological restoration and protection in Sanjiangyuan region. Therefore, to research herdsman's well-being connotation and the changing situation of in the ecological protection,toherdsman's well-being improvement as the goal to establish the compensation standard and adjust the compensation mechanism, and encourage herdsman to Continued participate behavior of the ecological protection, which are very important to eventually continue to promote the ecological protection to carry out the latter part of the Sanjiangyuan region,and is crucial to maintain social and economic sustainable development.
     This paper combine welfare economics theory and the core idea of Millennium Ecosystem Report, defined the connotation of human well-being in ecosystem services changes, evaluate and analyse herdsman's well-being changes.By stating the meaning of the well-being on the basis of Sen's capability framework, It Revealed that, The connotation of the human well-being on ecosystem services was the Freedom of choice and capability of the human, poverty was Capability and development of the human to be limited. Ecosystem degradation or destruction will seriously threat to human well-being, particularly involved well-being of the poor. We should focus on the human well-being of the poor who depended on ecosystem services, and effectively implement the ecological compensation through the internalization of external effects, to stimulate the behavior of the ecological protection, and then to realize a win-win between ecological proted and human well-being improved. This paper made the herdsman in the grassland ecological protection as research object, respectively gave an example for the ecological migration in Sanjiangyuan grassland and the herdsman who were limited to graze for grassland, to analyse nine functional indexes in different kinds of herdsman participate the behavior of the ecological protection, they are life, health, safety, social relations, environment, social adaption, liberty, and happiness. It combine with maslow's demand theory of hierarchy to determine the importance of different grade function, and deem that among the well-being of each function is the progressive type, the realized degree of the low level function will promote the realization of the high level function. Last, to respectively evaluate the well-being change situation between beginning and end for immigrants in Sanjiangyuan region and herdsman who were limited to graze in participating the behavior of eco-protection. Some studies indicated that the immigrant well-being levels have declined after participating the behavior of ecological protection, it mainly due to the loss of herdsman's right for using grassland that lead to reduce their income, their freedom is affected in using resource and participating environmental management, immigrant geographical and blood relationship that are formed in grazing life, this relationships are divided that make the supporting function in social relationship to decline, and the survival skills of immigrants did not get promoted which affected the realization of the high level function such as social adaptation, happiness etc. On the contrary, the herdsman's well-being levels have slightly increased after participating limited graze, although herdsman's income had a certain falling, such as residential conditions and health care etc various functional promotion that make different functions such as life, health, safety, social relations, and environment have greatly improvement, and the herdsman's restrictions are less than immigrant in using the right of grassland, and the herdsman didn't have large scale migration, so the damage for the ability of social adaptation is not obvious, and then the herdsman's well-being levels has slight increase. Obviously, herdsman's income levels are certainly influenced through they participated in the behavior of ecological protection, on the one hand, when their income levels can sustain daily living requirements, and other well-being functional improvement can make well-being levels improve in a certain extent; On the other hand, while their income levels are visibly descend, and their other living abilities are not improved and other well-being functions are not implemented, so herdsman's well-being often obvious drop, even can fall into pauperization. As a result, the herdsman's income ability among in the behavior of ecological protection and other well-being functions are important ingredients, which should be emphasized, and compensated, especially, on the basis of lower level well-being function such as welcome is compensated, we should focus on compensation and ascension for the high level function such as freedom and living reality etc.
     This paper analyzed the herdsman's well-being equilibrium of the ecological protection in Sanjiangyuan region, the results indicate that if don't want to make the herdsman's well-being decline, we must improve the compensation standard and reduce herdsman's dependence for grassland resources. Therefore, on the base of improving the compensation standard, we need to consider how to create employment opportunities through transformation of regional economic developmental pattern and structural adjustment, to strengthen herdsman's employment skills and feasible ability through improving the herdsman's cultural educational level, professional skill training etc, and make the herdsman obtain more economic income in their own efforts and with the help of the government by the living transformation of non-grazing livelihood means and other more kinds of management approach. Only in this way can herdsman gradually reduce dependence and utilization for grassland, so to fundamentally achieve the ecological environment protection, and then to form the virtuous cycle between the raise of herdsman's feasible ability and the ecological environment improvement.
     After literature analysis, this paper took ecological compensation as an important mechanism for poverty alleviation. Only if we formulate the ecological compensation standards based on ecological protection behavioral intentions and well-being loss, clearly defined the ecological protection responsibility of stakeholders and region, and built a scientific ecological compensation mechanism, can we achieve welfare equilibrium, guide the herdsman to active participatory protection, and truly achieve the win-win situation of ecological protection-improved human well-being-sustainable development. Based on the climate factor data from2002to2010in Sanjiangyuan region, this paper simulated the change of NPP of Sanjiangyuan region for the past ten years after protecting grassland ecological, and accounted the grassland ecosystem service value of the counties in Sanjiangyuan region after2005. The studies showed that the ecological service function of Sanjiangyuan region declined slowly at first and then rose gradually from2005to2010, which showed the restoration and protective behaviors had taken into effect, grassland ecosystem of Sanjiangyuan region was gradually restoring and improving; The added value of ecological protection effectiveness in Sanjiangyuan region showed great regional differences:the grassland ecosystem recovery was slow in the region with relatively high altitude, bad climate and severe degradation, and the region with the greatest increase was Gande County, whose added value of grassland ecosystem service was10.860thousand yuan/km2, but Tanggula village and Qumalai County was only2,210thousand yuan/km2and6,370yuan/km2repectively, with the minimum amount; in the past five years since protection in2005, the added value per unit area in Sanjiangyuan region was9,020thousand yuan/km, and added value of grassland conservation benefits was regarded as an incentive compensation standard to inspire the herdsman protect the ecological environment.
     This paper calculated the practical and theoretical loss of income (opportunity cost) and the cost of participation because the grass resource use rights was prohibited or restricted when the herdsman of Sanjiangyuan region participated in ecological protection. The loss of the well-being of herdsman should theoretically be compensated in order to maintain the well-being balance. The loss of actual opportunity costs were42.846thousand yuan/household and16.478thousand yuan/household for the immigrants and herdsman in Sanjiangyuan region. The average participation cost was3001.63yuan/hm2for the herdsman in Sanjiangyuan region based on the theoretical stocking rate of grass, and the average loss of opportunity cost was750.458yuan/hm2. Due to the different altitude, different degree of grassland degradation and different transport accessibility, the counties in Sanjiangyuan region showed great differences in participation costs and opportunity costs, so compensation content and standards should be different too.
     Based on consumer surplus theory and externality theory,combined with the herdsman's willingness to participate in eco-protection behavior, we analyzed herdsman's the minimum compensation standards which make the herdsman willing to participate in eco-protective behaviors and to avoid the well-being damaged.It shows that. Approximately66.7%of the herdsman expressed their willingness to participate in eco-protection behavior, An important guarantee which Herdsman's probability of participate in eco-protective behaviors was increased, was the Herdsman's well-being will at least does not decrease. If herdsman has more opportunity of regional jobs, more abundant diversification of lilvelihood, High level of external awareness of ecological protection, they would be more willingness to participate in ecological protection response. This reveals that,the key to promote the herdsman energeticly participate in ecological protection response, is herdsman could be sharing the external benefits of ecological protection, Promote the herdsman level of diversification of livelihoods and enhance the level of employment of the herdsman. The migration's willingness to accept which based on the mean and median compensation, amounted to12.886thousand yuan/household and20.5668thousand yuan/household. The grazing restricted herdsman's willingness to accept which based on the mean and median compensation, amounted to6.733thousand yuan/household and11.4316thousand yuan/household. The migration's WTA is higher than restrict grazing herdsman's WTA, the reason is that, compared with the restrict grazing herdsman, Immigration's well-being was Suffered of relatively higher losses and their grassland use rights was limited in a larger extent.
     In this paper, using the administrative divisions of each county as spatial boundaries of payment for ecosystem services and taking the degree of payment for ecosystem services, We divided the priorities of the compensation area and explored the regional compensation standards and development models, based on the Ecological Restoration effective and compensation efficient,calculated the priority degree of payment for ecosystem services, and conbined the difficulty of grassland ecological rehabilitation and degradation. Zaduo County, Dari and Madoi were classified as priority compensation area, which has Conservation benefits increased the most obvious and priority to the highest degree, The region to achieve ecological protection through ecological migrants, the feature of migrants s compensation standards was incentive and the highest one, the value of compensation standards was summation of the ecological conservation benefits added and the participation cost, and standards shuould not be less than the minimum willingness to accept compensation amount, that is20.5668thousand yuan/household.Tanggula township, Chengduo county and Zhiduo county were designated as key protection compensation, which has the lowest priority and the most difficult of ecology restore, the region also should enforce ecological migrants to achieve ecological protection. Characteristic of migrants's compensation standards was encouraged and compensated, the vaule of migrants's compensation standards was summation of the ecological conservation benefits added and the implementation cost, it also should be more than20.5668thousand yuan/household. Jiuzhi county, Banma county, the Qumalai county, Yushu county were classified as secondary compensation areas, which has the second priority and impose restrictions on grazing to achieve ecological protection, the herdsman's compensation standards was summation of the ecological conservation benefits added and the opportunity cost, it also should be more than11.4316thousand yuan/household. Regions of third priority defined as potential compensation areas, which could be restricted grazing and in the proper development of the green economy, in order to improve the well-being of the herdsman and relaize ecological and economic sustainable development. In the case of sufficient funds, the herdsman's compensation standards should be summation of the ecological conservation benefits added and the transaction costs.
     Aim to optimize the well-being of herdsman, it not only Proposed that herdsman's loss of economic income and well-being function all should be compensated, but also verified the Sustainable and motivating compensation standards, by raising the compensation standards and implementing differentiated compensation to improve the well-being of the herdsman, and then to enhance the herdsman's enthusiasm and initiative of taking participate in eco-protection, and realized that the economic sustainable be developmented and social well-being be maximized in Sanjiangyuan regions.
引文
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