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1.
In this article, we argue that people’s adjustments to multiple shocks and changes, such as conflict and drought, are intrinsically
political processes that have uneven outcomes. Strengthening local adaptive capacity is a critical component of adapting to
climate change. Based on fieldwork in two areas in Kenya, we investigate how people seek to access livelihood adjustment options
and promote particular adaptation interests through forming social relations and political alliances to influence collective
decision-making. First, we find that, in the face of drought and conflict, relations are formed among individuals, politicians,
customary institutions, and government administration aimed at retaining or strengthening power bases in addition to securing
material means of survival. Second, national economic and political structures and processes affect local adaptive capacity
in fundamental ways, such as through the unequal allocation of resources across regions, development policy biased against
pastoralism, and competition for elected political positions. Third, conflict is part and parcel of the adaptation process,
not just an external factor inhibiting local adaptation strategies. Fourth, there are relative winners and losers of adaptation,
but whether or not local adjustments to drought and conflict compound existing inequalities depends on power relations at
multiple geographic scales that shape how conflicting interests are negotiated locally. Climate change adaptation policies
are unlikely to be successful or minimize inequity unless the political dimensions of local adaptation are considered; however,
existing power structures and conflicts of interests represent political obstacles to developing such policies. 相似文献
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Opperman JJ 《Environmental management》2005,35(3):266-277
Although large woody debris (LWD) has been studied extensively in conifer-dominated watersheds, relatively little is known about LWD in hardwood-dominated watersheds. Field surveys of 32 hardwood-dominated stream reaches in northern coastal California revealed that levels of LWD varied with land ownership and that living trees strongly influenced debris jam formation. Almost half of the channel-spanning debris jams, which stored the most wood and were most likely to form a pool, were formed behind a key piece that was still living. These living key pieces might provide greater longevity and stability than would otherwise be expected from hardwood LWD. Compared to streams on private land, streams on public land had significantly greater LWD loading and debris-jam frequency. Land management practices that remove wood from streams might be contributing to the degradation of salmonid habitat in Californias hardwood-dominated watersheds. 相似文献
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"Working landscapes" is the concept of fostering effective ecosystem stewardship and conservation through active human presence and management and integrating livestock, crop, and timber production with the provision of a broad range of ecosystem services at the landscape scale. Based on a statewide survey of private landowners of "working" forests and rangelands in California, we investigated whether owners who are engaged in commercial livestock or timber production appreciate and manage biodiversity and ecosystem services on their land in different ways than purely residential owners. Both specific uses and management practices, as well as underlying attitudes and motivations toward biodiversity and ecosystem services, were assessed. Correlation analysis showed one bundle of ecosystem goods and services (e.g., livestock, timber, crops, and housing) that is supported by some landowners at the community level. Another closely correlated bundle of biodiversity and ecosystem services includes recreation, hunting/fishing, wildlife habitat, and fire prevention. Producers were more likely to ally with the first bundle and residential owners with the second. The survey further confirmed that cultural ecosystem services and quality-of-life aspects are among the primary amenities that motivate forest and rangeland ownership regardless of ownership type. To live near natural beauty was the most important motive for both landowner groups. Producers were much more active in management for habitat improvement and other environmental goals than residential owners. As the number of production-oriented owners decreases, developing strategies for encouraging environment-positive management by all types of landowners is crucial. 相似文献
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Assessing China’s Ecological Restoration Programs: What’s Been Done and What Remains to Be Done? 总被引:3,自引:0,他引:3
This article surveys the recent literature that has assessed China’s ecological restoration programs, including the Sloping
Land Conversion Program (SLCP) and the Natural Forest Protection Program (NFPP). Our presumption is that the performance of
these programs should be determined by their effectiveness of implementation and significance of impact. Implementation effectiveness
can be measured with such indicators as land area converted or conserved, and survival and stocking rates of restored vegetation,
while impact significance can be gauged by the induced changes in ecosystem functionality and stability (erosion control,
biodiversity protection, etc.) and socioeconomic conditions. Coupling this matrix with an exhaustive search of the publications,
we find that: (1) the implementation effectiveness has not been examined as extensively as the impact significance; (2) efforts
to assess the impact significance have concentrated on the SLCP, particularly its socioeconomic effects: growth of income,
alternative industry, and employment, and likelihood of re-conversion; and (3) most of the socioeconomic studies are based
on rural household surveys and discrete choice and difference in differences models. While much has been learned from previous
studies, a lot more needs to be done in improving our understanding of the program execution and impacts. Future work should
pay more attention to the NFPP and other programs, and the environmental impacts and the implementation effectiveness of all
of them. To these ends, analysts must gather more field data regarding the evolving ecosystem conditions and socioeconomic
information of higher aggregation, and conduct their research across scales and disciplines, with better application of geospatial
technology and more effective modeling. 相似文献
5.
Valuing New Jersey’s Ecosystem Services and Natural Capital: A Spatially Explicit Benefit Transfer Approach 总被引:3,自引:0,他引:3
Shuang Liu Robert Costanza Austin Troy John D’Aagostino Willam Mates 《Environmental management》2010,45(6):1271-1285
We intend to estimate the value of ecosystem services in the U.S. State of New Jersey using spatially explicit benefit transfer.
The aggregated net rent, a conservative underestimate for the total economic value of the state’s natural environment, ranged
from 11.6 to11.6 to 19.6 billion/year, conditional on how inclusive we were in selecting the primary studies used to calculate
the central tendency values to transfer. In addition to calculating the range, mean, and standard deviation for each of 12
ecosystem services for 11 Land Use/Land Cover (LULC) types, we also conduct a gap analysis of how well ecosystem service values
are represented in the literature. We then map these values by assuming a mean value for each LULC and apply this to spatial
data. As to sensitivity analysis, we calculate the net present value of New Jersey’s natural environment utilizing three different
methods of discounting. These research results provide a useful, albeit imperfect, basis for assessing the value of ecosystem
services and natural capital, and their comparison with the value of conventional human and built capitals. 相似文献
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Abel Duarte Alonso 《The Environmentalist》2009,29(4):388-397
Despite aquaculture’s contribution providing an additional food source or employment in rural areas, this industry is often
presented in a controversial way, including its impact on the environment. However, an argument can also be made in favour
of aquaculture operators and their efforts to follow environmentally sound practices. Along these lines, the present study
investigates operators’ stance on environmental sustainability from a group of 26 Western Australian marron growers. Overall,
the findings demonstrate growers’ commitment to grow marron environmentally, for instance, without the use of fertilisers
or feeding. Furthermore, respondents are in agreement with the potential effects of environmentally unfriendly practices,
especially as in many cases marron growing is a complement to rural activities such as horticulture and cattle farming. At
the other end, some operators voice concerns on a different environmental issue, namely, the challenge that increasing droughts
and lack of sufficient rain is posing to their industry. 相似文献
8.
Paul Haught 《Journal of Agricultural and Environmental Ethics》2010,23(1-2):129-143
This essay offers a critical assessment of environmental virtue ethics (EVE). Finding an environmental ethical analogy with Hume’s critique of the sensible knave, I argue that EVE is limited in much the same way as morality is on the Humean view. Advocates of nonanthropocentrism will find it difficult to engage those whose virtues comport them to anthropocentrism. Nonetheless, EVE is able to ground confidence in nonanthropocentric virtues by explicating specific key virtues, thereby holding open the possibility of bridging the motivational gap between anthropocentrism and nonanthropocentrism. 相似文献
9.
The Sacramento-San Joaquin Delta, the landward reach of the San Francisco Estuary, provides habitat for threatened delta smelt,
endangered winter-run Chinook salmon, and other species of concern. It is also the location of huge freshwater diversion facilities
that entrain large numbers of fish. Reducing the entrainment of listed fishes into these facilities has required curtailment
of pumping, reducing the reliability of water deliveries. We reviewed the first 5 years (2001–2005) of the Environmental Water
Account (EWA), a program instituted to resolve conflicts between protecting listed fishes and providing a reliable water supply.
The EWA provided fishery agencies with control over 0.2–0.4 km3 of water to be used for fish protection at no cost to users of exported water, and fish agencies guaranteed no disruption
of water supply for fish protection. The EWA was successful in reducing uncertainty in water supply; however, its contribution
to the recovery of listed fishes was unclear. We estimated the effectiveness of the EWA to be modest, increasing the survival
of winter-run Chinook salmon by 0–6% (dependent on prescreen mortality), adult delta smelt by 0–1%, and juvenile delta smelt
by 2–4%. Allocating EWA water for a single life stage of one species could provide larger gains in survival. An optimally
allocated EWA of equal size to the median of the first 5 years could increase abundance of juvenile delta smelt up to 7% in
the springs of dry years. If the EWA is to become a long-term program, estimates of efficacy should be refined. If the program
is to be held accountable for quantitative increases in fish populations, it will be necessary to integrate scientific, possibly
experimental, approaches. 相似文献
10.
China’s new Classification-Based Forest Management (CFM) is a two-class system, including Commodity Forest (CoF) and Ecological
Welfare Forest (EWF) lands, so named according to differences in their distinct functions and services. The purposes of CFM
are to improve forestry economic systems, strengthen resource management in a market economy, ease the conflicts between wood
demands and public welfare, and meet the diversified needs for forest services in China. The formative process of China’s
CFM has involved a series of trials and revisions. China’s central government accelerated the reform of CFM in the year 2000
and completed the final version in 2003. CFM was implemented at the provincial level with the aid of subsidies from the central
government. About a quarter of the forestland in China was approved as National EWF lands by the State Forestry Administration
in 2006 and 2007. Logging is prohibited on National EWF lands, and their landowners or managers receive subsidies of about
70 RMB (US$10) per hectare from the central government. CFM represents a new forestry strategy in China and its implementation
inevitably faces challenges in promoting the understanding of forest ecological services, generalizing nationwide criteria
for identifying EWF and CoF lands, setting up forest-specific compensation mechanisms for ecological benefits, enhancing the
knowledge of administrators and the general public about CFM, and sustaining EWF lands under China’s current forestland tenure
system. CFM does, however, offer a viable pathway toward sustainable forest management in China. 相似文献
11.
Caruso BS 《Environmental management》2006,37(6):840-861
Ecological restoration is increasingly becoming a primary component of broader environmental and water resources management
programs throughout the world. The New Zealand Department of Conservation implemented Project River Recovery (PRR) in 1991
to restore unique braided gravel-bed river and wetland habitat in the Upper Waitaki Basin in New Zealand’s high country of
the South Island, which has been severely impacted by hydroelectric power development. These braided rivers are highly dynamic,
diverse, and globally important ecosystems and provide critical habitat to numerous native wading and shore bird species,
including several threatened species such as the black stilt. The objective of this study was to review and summarize PRR
after more than 10 years of implementation to provide information and transfer knowledge to other nations and restoration
programs. Site visits were conducted, discussions were held with key project staff, and project reports and related literature
were reviewed. Primary components of the program include pest plant and animal control, wetland construction and enhancement,
a significant research and monitoring component, and public awareness. The study found that PRR is an excellent example of
an ecological restoration program focusing on conserving and restoring unique habitat for threatened native bird species,
but that also includes several secondary objectives. Transfer of knowledge from PRR could benefit ecological restoration programs
in other parts of the world, particularly riverine floodplain and braided river restoration. PRR could achieve even greater
success with expanded goals, additional resources, and increased integration of science with management, especially broader
consideration of hydrologic and geomorphologic effects and restoration opportunities. 相似文献
12.
As a member of the British Oxford Group, psychologist Richard Ryder marked the beginning of the modern animal rights and animal welfare movement in the seventies. By introducing the concept “speciesism.” Ryder contributed importantly to the expansion of this movement. Surprisingly little attention has been paid to Ryder’s moral theory, “painism”, that aims to resolve the conflict between the two predominant rival theories in animal ethics, the deontological of Tom Regan and the utilitarian of Peter Singer. First, this paper examines the kernel and historical sources of Ryder’s painist theory, linking it to the work of John Rawls and Jean-Jacques Rousseau. Second, it examines Ryder’s critique of utilitarianism. It is argued that his critique of Singer’s use of the word “sentience” is unconvincing and that his critique of utilitarian aggregation as not taking a full account of the metaphysical separateness of persons, has already been countered and dealt with. Finally this paper looks at some of the counterintuitive implications of Ryder’s theory and argues that utilitarianism might have more resources for dealing with its own alleged counterintuitive implications than Ryder acknowledges. 相似文献
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Increasingly, performance measurement is being used to hold federal agencies accountable, represent environmental progress, and evaluate the effectiveness of environmental programs. The need to track measurable outputs has created a tendency to present programmatic progress solely by quantifiable data, despite the inherent complexity of natural resource management. Wetlands and fire management programs are two specific environmental arenas that have come to overemphasize the tracking of acreage numbers to validate existing policy direction. In both of these arenas, we find the definition and categorization of "countable" acres to be inconsistent and unreliable. We explore this systemic flaw for both wetlands and fire programs and describe its implications for environmental policy and natural resource management more broadly. We conclude with recommendations for improved performance measurement in these arenas. 相似文献
16.
Recent research has focused on establishing the values of preserving biodiversity both in agriculture and in less managed ecosystems, and in showing the importance of the role of cultural diversity in preserving biodiversity in food production systems. A study of the philosophy embedded in cultural systems can reveal the importance of the technological information for preserving genetic biodiversity contained in such systems and can be used to support arguments for the protection/preservation of cultural diversity. For example, corn or maize can serve as a paradigm of Native American thinking and can provide one of the few areas from which common philosophical conceptions can emerge. An examination of the cultivation of corn or maize as an agricultural activity and as a cultural activity in Native American literature reveals a philosophy that recognizes the importance of biodiversity and provides techniques for its preservation. Corn, and the food and the materials derived from it, is something thought out, not by specialists, but by the entire tribe and its ancestors, even if this thinking is done within what we might consider a framework of highly mythical notions. Importantly, this framework yields an understanding of both the genetics and nutrition of corn. A survey of these mythical notions (myths and stories) and agricultural practices makes this thought explicit and exemplifies the value of cultural diversity and biodiversity. 相似文献
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Wetland protection and restoration strategies that are designed to promote hydrologic resilience do not incorporate the location of wetlands relative to the main stream network. This is primarily attributed to the lack of knowledge on the effects of wetland location on wetland hydrologic function (e.g., flood and drought mitigation). Here, we combined a watershed‐scale, surface–subsurface, fully distributed, physically based hydrologic model with historical, existing, and lost (drained) wetland maps in the Nose Creek watershed in the Prairie Pothole Region of North America to (1) estimate the hydrologic functions of lost wetlands and (2) estimate the hydrologic functions of wetlands located at different distances from the main stream network. Modeling results showed wetland loss altered streamflow, decreasing baseflow and increasing stream peakflow during the period of the precipitation events that led to major flooding in the watershed and downstream cities. In addition, we found that wetlands closer to the main stream network played a disproportionately important role in attenuating peakflow, while wetland location was not important for regulating baseflow. The findings of this study provide information for watershed managers that can help to prioritize wetland restoration efforts for flood or drought risk mitigation. 相似文献