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3.
Environ Monit Assess ; 191(4): 219, 2019 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-30874902

RESUMEN

The Paris Agreement (PA), which is an important step toward mitigating climate change, has ascribed new responsibilities to the signatory parties that differ from those of the Kyoto Protocol (KP). This study is focused on the new responsibilities and the reasons why Turkey has not yet assigned the agreement into its own domestic law, although it was signed on April 22, 2016. There are several political and legal reasons for this, but the most important is Turkey's membership in the OECD as a developed country. Besides, developing countries shall be supported by the Green Climate Fund (GCF) at a $100 billion budget per year. Turkey needs GCF support in terms of technology transfer, capacity building, and financial in order to achieve the agreement's goals. Turkey has demanded privileged status similar to the one in the KP, i.e., whether or not to be deemed as a developed country.The core aim of the PA is to keep global temperature increases below 20 °C by the year 2030, insomuch as to limit temperature increases even further to 1.50 °C. This goal depends on the mitigation of CO2 levels, which means that countries should mitigate GHG emissions caused by deforestation and take further actions by primarily abandoning fossil fuels, improving/attaching importance to energy efficiency, and changing/improving land use planning. Within this context, the second part of the study analyzes the efficiency level of forestry legislation and Turkey's climate policies in terms of the responsibilities to be assigned by the PA. The analysis is based on the question as to what extent the Turkish forestry legislation fulfills the responsibilities ascribed by the PA for preventing deforestation. Consequently, it has been concluded that eight criteria determined by the PA are not adequately included in the Turkish forestry legislation and shall require an amendment on a large scale, particularly when Turkey is deemed as a developed country.


Asunto(s)
Conservación de los Recursos Naturales/métodos , Países Desarrollados , Política Ambiental , Agricultura Forestal/legislación & jurisprudencia , Bosques , Cambio Climático , Monitoreo del Ambiente , Combustibles Fósiles , Turquia
4.
Environ Manage ; 60(1): 69-85, 2017 07.
Artículo en Inglés | MEDLINE | ID: mdl-28396912

RESUMEN

After two major storms, the Swedish Transport Administration was granted permission in 2008 to expand the railroad corridor from 10 to 20 m from the rail banks, and to clear the forest edges in the expanded area. In order to evaluate the possibilities for managers to promote and control the species composition of the woody regrowth so that a forest edge with a graded profile develops over time, this study mapped the woody regrowth and environmental variables at 78 random sites along the 610-km railroad between Stockholm and Malmö four growing seasons after the clearing was implemented. Through different clustering approaches, dominant tree species to be controlled and future building block species for management were identified. Using multivariate regression trees, the most decisive environmental variables were identified and used to develop a regrowth typology and to calculate species indicator values. Five regrowth types and ten indicator species were identified along the environmental gradients of soil moisture, soil fertility, and altitude. Six tree species dominated the regrowth across the regrowth types, but clustering showed that if these were controlled by selective thinning, lower tree and shrub species were generally present so they could form the "building blocks" for development of a graded edge. We concluded that selective thinning targeted at controlling a few dominant tree species, here named Functional Species Control, is a simple and easily implemented management concept to promote a wide range of suitable species, because it does not require field staff with specialist taxonomic knowledge.


Asunto(s)
Conservación de los Recursos Naturales/métodos , Agricultura Forestal/organización & administración , Bosques , Árboles/crecimiento & desarrollo , Altitud , Conservación de los Recursos Naturales/legislación & jurisprudencia , Conservación de los Recursos Naturales/estadística & datos numéricos , Tormentas Ciclónicas , Agricultura Forestal/estadística & datos numéricos , Regulación Gubernamental , Distribución Aleatoria , Estaciones del Año , Suelo/química , Suecia , Transportes/legislación & jurisprudencia
5.
Braz J Biol ; 75(1): 125-34, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25945629

RESUMEN

The amendments to the Forest Law proposed by the Brazilian government that allow partial substitution of forested areas by agricultural activities raised deep concern about the integrity of aquatic ecosystems. To assess the impacts of this alteration in land uses on the watershed, diffuse loads of total nitrogen (Nt) and total phosphorus (Pt) were estimated in Lobo Stream watershed, southeastern Brazil, based on export coefficients of the Model of Correlation between Land Use and Water Quality (MQUAL). Three scenarios were generated: scenario 1 (present scenario), with 30-meter-wide permanent preservation areas along the shore of water bodies and 50-meter-radius in springs; scenario 2, conservative, with 100-meter-wide permanent preservation areas along water bodies; and scenario 3, with the substitution of 20% of natural forest by agricultural activities. Results indicate that a suppression of 20% of forest cover would cause an increase in nutrient loads as well as in the trophic state of aquatic ecosystems of the watershed. This could result in losses of ecosystem services and compromise the quality of water and its supply for the basin. This study underlines the importance of forest cover for the maintenance of water quality in Lobo Stream watershed.


Asunto(s)
Agricultura Forestal/legislación & jurisprudencia , Bosques , Nitrógeno/análisis , Fósforo/análisis , Contaminantes Químicos del Agua/análisis , Calidad del Agua , Agricultura , Brasil , Monitoreo del Ambiente/métodos , Sistemas de Información Geográfica , Humanos
6.
Braz. j. biol ; 75(1): 125-134, Jan-Mar/2015. tab, graf
Artículo en Inglés | LILACS | ID: lil-744336

RESUMEN

The amendments to the Forest Law proposed by the Brazilian government that allow partial substitution of forested areas by agricultural activities raised deep concern about the integrity of aquatic ecosystems. To assess the impacts of this alteration in land uses on the watershed, diffuse loads of total nitrogen (Nt) and total phosphorus (Pt) were estimated in Lobo Stream watershed, southeastern Brazil, based on export coefficients of the Model of Correlation between Land Use and Water Quality (MQUAL). Three scenarios were generated: scenario 1 (present scenario), with 30-meter-wide permanent preservation areas along the shore of water bodies and 50-meter-radius in springs; scenario 2, conservative, with 100-meter-wide permanent preservation areas along water bodies; and scenario 3, with the substitution of 20% of natural forest by agricultural activities. Results indicate that a suppression of 20% of forest cover would cause an increase in nutrient loads as well as in the trophic state of aquatic ecosystems of the watershed. This could result in losses of ecosystem services and compromise the quality of water and its supply for the basin. This study underlines the importance of forest cover for the maintenance of water quality in Lobo Stream watershed.


As alterações no novo Código Florestal propostas pelo governo brasileiro (Lei número 4.771/65, de 15 de Setembro de 1965), o qual permite a substituição parcial de áreas de florestas para atividades agrícolas, levantou profunda preocupação com a integridade dos ecossistemas aquáticos. Para avaliar tais alterações no uso da terra propostas pelo novo código, as cargas difusas de nitrogênio total (Nt) e fósforo total (Pt) foram estimadas na bacia hidrográfica do Ribeirão do Lobo, sudeste do Brasil, com base em coeficientes de exportação do Modelo de Correlação entre Uso do Solo e Qualidade da Água (MQUAL). Três cenários foram simulados com o modelo: cenário 1 (cenário atual), com 30 metros de áreas de proteção permanente ao longo da margem dos corpos d'água e 50 metros de raio a partir do curso de água; cenário 2, conservador, com áreas de preservação permanente de 100 metros de largura ao longo a margem de corpos d’água; e cenário 3, a substituição de 20% da floresta natural por terras agrícolas. Os resultados indicam que a supressão de 20% da cobertura vegetal na bacia hidrográfica aumentaria as cargas de nutrientes e consequentemente a trofia dos ambientes aquáticos da bacia, podendo resultar em perdas de serviços ambientais e comprometer a qualidade e o abastecimento de água na bacia hidrográfica. O presente estudo evidencia a importância da vegetação para a manutenção da qualidade da água na bacia hidrográfica do ribeirão do Lobo.


Asunto(s)
Humanos , Bosques , Agricultura Forestal/legislación & jurisprudencia , Nitrógeno/análisis , Fósforo/análisis , Calidad del Agua , Contaminantes Químicos del Agua/análisis , Agricultura , Brasil , Monitoreo del Ambiente/métodos , Sistemas de Información Geográfica
7.
Environ Manage ; 54(1): 112-21, 2014 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24894007

RESUMEN

To examine ownership and protection status of forests with high-biomass stores (>200 Mg/ha) in the Pacific Northwest (PNW) region of the United States, we used the latest versions of publicly available datasets. Overlay, aggregation, and GIS-based computation of forest area in broad biomass classes in the PNW showed that the National Forests contained the largest area of high-biomass forests (48.4 % of regional total), but the area of high-biomass forest on private lands was important as well (22.8 %). Between 2000 and 2008, the loss of high-biomass forests to fire on the National Forests was 7.6 % (236,000 ha), while the loss of high-biomass forest to logging on private lands (364,000 ha) exceeded the losses to fire across all ownerships. Many remaining high-biomass forest stands are vulnerable to future harvest as only 20 % are strictly protected from logging, while 26 % are not protected at all. The level of protection for high-biomass forests varies by state, for example, 31 % of all high-biomass federal forests in Washington are in high-protection status compared to only 9 % in Oregon. Across the conterminous US, high-biomass forest covers <3 % of all forest land and the PNW region holds 56.8 % of this area or 5.87 million ha. Forests with high-biomass stores are important to document and monitor as they are scarce, often threatened by harvest and development, and their disturbance including timber harvest results in net C losses to the atmosphere that can take a new generation of trees many decades or centuries to offset.


Asunto(s)
Conservación de los Recursos Naturales/métodos , Árboles/crecimiento & desarrollo , Biomasa , Incendios , Agricultura Forestal/legislación & jurisprudencia , Sistemas de Información Geográfica , Oregon , Propiedad/clasificación , Árboles/clasificación , Washingtón
8.
Hist Sci (Tokyo) ; 21(3): 161-73, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22834068

RESUMEN

In South Korea, the Green Revolution has been commonly understood as the development and dissemination of new rice varieties ('Tongil' rice) and the rapid increase of rice yield in the 1970s. However, revolutionary success in agriculture was not the only green revolution South Korea experienced; another green revolution lay in the success of reforestation projects. In the 1970s, South Korea's forest greening was closely related to its agricultural revolution in several ways. Therefore, South Korea's Green Revolution was an intrinsically linked double feature of agriculture and forestry. This two-pronged revolution was initiated by scientific research - yet accomplished by the strong administrative mobilization of President Park Chung Hee's regime. The process of setting goals and meeting them through a military-like strategy in a short time was made possible under the authoritarian regime, known as 'Yushin', though the administration failed to fully acknowledge scientific expertise in the process of pushing to achieve goals.


Asunto(s)
Agricultura , Autoritarismo , Conservación de los Recursos Naturales , Agricultura Forestal , Gobierno , Oryza , Agricultura/economía , Agricultura/educación , Agricultura/historia , Agricultura/legislación & jurisprudencia , Conservación de los Recursos Naturales/economía , Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/legislación & jurisprudencia , Productos Agrícolas/economía , Productos Agrícolas/historia , Agricultura Forestal/economía , Agricultura Forestal/educación , Agricultura Forestal/historia , Agricultura Forestal/legislación & jurisprudencia , Gobierno/historia , Historia del Siglo XX , Oryza/economía , Oryza/historia , República de Corea/etnología , Cambio Social/historia
11.
Geogr J ; 178(1): 67-79, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22413174

RESUMEN

This paper focuses on the interplay between environmental narratives, identity politics and the management of forest resources in Madagascar. While efforts to conserve the island's biological diversity have centred primarily on the designation of protected areas, policies have increasingly focused on local communities. The experiences of the last 20 years have shown that community-based approaches to conservation offer considerable challenges due to the complex politics of natural resource use, which involve multiple and diverse stakeholders, often with very different and sometimes conflicting values. In this paper, I focus on the environmental perceptions and values of two groups in the Central Menabe region of western Madagascar ­ conservation organisations and rural households ­ revealing a contrasting set of views regarding the region's forest. I show that the conservation discourse has changed over time, increasingly emphasising the biological diversity of the region's tropical dry-deciduous forest and prioritising non-consumptive uses of natural resources. Although policy has changed in response to changing values, I show that it has been underpinned by the notion that hatsake ('slash-and-burn' agriculture) is an irrational practice driven by necessity rather than choice. Policy has thus sought to provide livelihood alternatives, firstly through forestry, then through changes in cultivation and increasingly through tourism. This misunderstands the local view of the forest, which sees hatsake as a way to make the land productive, as long as it is carried out responsibly according to local fady (taboos). As well as facing problems of translating conservation goals into local values and misunderstanding the motives for forest clearance, policy has been based on a narrative that attaches particular land use practices to ethnic identities. I argue that this ignores the history and fluid reality of both identity and land use.


Asunto(s)
Agricultura , Conservación de los Recursos Naturales , Etnicidad , Abastecimiento de Alimentos , Política , Opinión Pública , Agricultura/economía , Agricultura/educación , Agricultura/historia , Conservación de los Recursos Naturales/economía , Conservación de los Recursos Naturales/historia , Ecología/economía , Ecología/educación , Ecología/historia , Etnicidad/educación , Etnicidad/etnología , Etnicidad/historia , Etnicidad/legislación & jurisprudencia , Etnicidad/psicología , Abastecimiento de Alimentos/economía , Abastecimiento de Alimentos/historia , Agricultura Forestal/economía , Agricultura Forestal/educación , Agricultura Forestal/historia , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Madagascar/etnología , Opinión Pública/historia , Identificación Social
12.
Bot J Linn Soc ; 166(3): 282-300, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-22059249

RESUMEN

China is one of the richest countries for plant diversity with approximately 33 000 vascular plant species, ranking second in the world. However, the plant diversity in China is increasingly threatened, with an estimated 4000­5000 plant species being threatened or on the verge of extinction, making China, proportionally, one of the highest priorities for global plant biodiversity conservation. Coming in the face of the current ecological crisis, it is timely that China has launched China's Strategy for Plant Conservation (CSPC). China has increasingly recognized the importance of plant diversity in efforts to conserve and sustainably use its plant diversity. More than 3000 nature reserves have been established, covering approximately 16% of the land surface of China. These natural reserves play important roles in plant conservation, covering more than 85% of types of terrestrial natural ecosystems, 40% of types of natural wetlands, 20% of native forests and 65% of natural communities of vascular plants. Meanwhile, the flora conserved in botanical gardens is also extensive. A recent survey shows that the 10 largest botanical gardens have living collections of 43 502 taxa, with a total of 24 667 species in ex situ conservation. These provide an important reserve of plant resources for sustainable economic and social development in China. Plant diversity is the basis for bioresources and sustainable utilization. The 21st century is predicted to be an era of bio-economy driven by advances of bioscience and biotechnology. Bio-economy may become the fourth economy form after agricultural, industrial, and information and information technology economies, having far-reaching impacts on sustainable development in agriculture, forestry, environmental protection, light industry, food supply and health care and other micro-economy aspects. Thus, a strategic and forward vision for conservation of plant diversity and sustainable use of plant resources in the 21st century is of far-reaching significance for sustainable development of Chinese economy and society.


Asunto(s)
Biodiversidad , Biotecnología , Conservación de los Recursos Naturales , Economía , Ecosistema , Agricultura/economía , Agricultura/educación , Agricultura/historia , Biotecnología/economía , Biotecnología/educación , Biotecnología/historia , China/etnología , Conservación de los Recursos Naturales/economía , Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/legislación & jurisprudencia , Economía/historia , Economía/legislación & jurisprudencia , Especies en Peligro de Extinción/historia , Agricultura Forestal/economía , Agricultura Forestal/educación , Agricultura Forestal/historia , Agricultura Forestal/legislación & jurisprudencia , Historia del Siglo XX , Historia del Siglo XXI , Plantas
13.
Lat Am Res Rev ; 46(1): 194-216, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21751476

RESUMEN

Declining profitability of agriculture and/or higher prices of forest products and services typically drive an increase in forest cover. This article examines changes in forest cover in Candelaria Loxicha, Mexico. Forest cover increased in the area as a result of coffee cultivation in coffee forest-garden systems. Dependence on forest products and services, and not prices of forest products, drive the process in our study site. Low international coffee prices and high labor demand outside the community might pull farmers out of agriculture, but they do not completely abandon the lands. A diversification in income sources prevents land abandonment and contributes to maintaining rural populations and coffee forest gardens.


Asunto(s)
Agricultura , Café , Conservación de los Recursos Naturales , Economía , Agricultura Forestal , Agricultura/economía , Agricultura/educación , Agricultura/historia , Coffea , Café/economía , Café/historia , Conservación de los Recursos Naturales/economía , Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/legislación & jurisprudencia , Productos Agrícolas/economía , Productos Agrícolas/historia , Economía/historia , Economía/legislación & jurisprudencia , Ambiente , Agricultura Forestal/economía , Agricultura Forestal/educación , Agricultura Forestal/historia , Agricultura Forestal/legislación & jurisprudencia , Jardinería/economía , Jardinería/educación , Jardinería/historia , Historia del Siglo XX , Historia del Siglo XXI , México/etnología , Salud Rural/historia , Población Rural/historia , Árboles
14.
Plan Perspect ; 25(4): 433-55, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20857602

RESUMEN

In 1913, the Illinois Legislature enacted the Forest Preserve District Act. After adoption of the Act by voters in Cook County, the Chicago metropolitan area became among the first in the USA to establish a park system with an outer ring of nature preserves. This article chronicles the story of how the Cook County Forest Preserve District was established, its historical context and its influence on planning practice. It contends that although Chicago was not the originator of the idea of outer parks, it added significantly to development of the concept of comprehensive park system planning. The article contends that the paradigm of park management changed from conservation of the native landscape to multiple use management during the 20-year struggle to establish the district, and that passage of the Act was largely the result of the efforts of two individuals - Dwight Perkins and Jens Jensen.


Asunto(s)
Conservación de los Recursos Naturales , Agricultura Forestal , Legislación como Asunto , Salud Pública , Recreación , Actividades Cotidianas/psicología , Conservación de los Recursos Naturales/economía , Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/legislación & jurisprudencia , Agricultura Forestal/economía , Agricultura Forestal/educación , Agricultura Forestal/historia , Agricultura Forestal/legislación & jurisprudencia , Programas de Gobierno/economía , Programas de Gobierno/educación , Programas de Gobierno/historia , Programas de Gobierno/legislación & jurisprudencia , Historia del Siglo XX , Illinois/etnología , Legislación como Asunto/economía , Legislación como Asunto/historia , Salud Pública/economía , Salud Pública/educación , Salud Pública/historia , Salud Pública/legislación & jurisprudencia , Recreación/economía , Recreación/fisiología , Recreación/psicología , Cambio Social/historia
15.
J Peasant Stud ; 37(4): 631-60, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20873027

RESUMEN

The global political economy of biofuels emerging since 2007 appears set to intensify inequalities among the countries and rural peoples of the global South. Looking through a global political economy lens, this paper analyses the consequences of proliferating biofuel alliances among multinational corporations, governments, and domestic producers. Since many major biofuel feedstocks - such as sugar, oil palm, and soy - are already entrenched in industrial agricultural and forestry production systems, the authors extrapolate from patterns of production for these crops to bolster their argument that state capacities, the timing of market entry, existing institutions, and historical state-society land tenure relations will particularly affect the potential consequences of further biofuel development. Although the impacts of biofuels vary by region and feedstock, and although some agrarian communities in some countries of the global South are poised to benefit, the analysis suggests that already-vulnerable people and communities will bear a disproportionate share of the costs of biofuel development, particularly for biofuels from crops already embedded in industrial production systems. A core reason, this paper argues, is that the emerging biofuel alliances are reinforcing processes and structures that increase pressures on the ecological integrity of tropical forests and further wrest control of resources from subsistence farmers, indigenous peoples, and people with insecure land rights. Even the development of so-called 'sustainable' biofuels looks set to displace livelihoods and reinforce and extend previous waves of hardship for such marginalised peoples.


Asunto(s)
Biocombustibles , Ecología , Abastecimiento de Alimentos , Agricultura Forestal , Salud Pública , Cambio Social , Biocombustibles/economía , Biocombustibles/historia , Derechos Civiles/economía , Derechos Civiles/educación , Derechos Civiles/historia , Derechos Civiles/legislación & jurisprudencia , Derechos Civiles/psicología , Conservación de los Recursos Naturales/economía , Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/legislación & jurisprudencia , Ecología/economía , Ecología/educación , Ecología/historia , Ecología/legislación & jurisprudencia , Economía/historia , Economía/legislación & jurisprudencia , Ambiente , Abastecimiento de Alimentos/economía , Abastecimiento de Alimentos/historia , Abastecimiento de Alimentos/legislación & jurisprudencia , Agricultura Forestal/economía , Agricultura Forestal/educación , Agricultura Forestal/historia , Agricultura Forestal/legislación & jurisprudencia , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Política , Grupos de Población/educación , Grupos de Población/etnología , Grupos de Población/historia , Grupos de Población/legislación & jurisprudencia , Grupos de Población/psicología , Salud Pública/economía , Salud Pública/educación , Salud Pública/historia , Salud Pública/legislación & jurisprudencia , Cambio Social/historia , Clima Tropical
16.
Scand J Hist ; 35(4): 471-98, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-21280405

RESUMEN

In 1993 the Swedish parliament deregulated national forestry policy and established an environmental goal in parallel with the previous, long-standing goal of high wood production. This paper shows how the change occurred in the context of major changes in Swedish environmental policy during the late 1980s and early 1990s. Within a short time, new environmental legislation and the introduction of legal protection for small forest and agricultural habitats of high ecological value reoriented national forestry policy, away from an overriding focus on wood production to an increased awareness of nature conservation and biodiversity preservation. Reflecting a major compromise with the state, forest owners have gained greater freedom to manage their land, but must also improve environmental conditions while achieving high wood production, a policy known as 'freedom under responsibility'. The paper explains how both the parliament and industry supported increased nature conservation and biodiversity to maintain forest health and support the forestry industry, by favouring responsible resource use and not simply protection from human influence.


Asunto(s)
Biodiversidad , Conservación de los Recursos Naturales , Agricultura Forestal , Salud Pública , Política Pública , Agricultura/economía , Agricultura/educación , Agricultura/historia , Agricultura/legislación & jurisprudencia , Conservación de los Recursos Naturales/economía , Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/legislación & jurisprudencia , Ambiente , Agricultura Forestal/economía , Agricultura Forestal/educación , Agricultura Forestal/historia , Agricultura Forestal/legislación & jurisprudencia , Programas de Gobierno/economía , Programas de Gobierno/educación , Programas de Gobierno/historia , Programas de Gobierno/legislación & jurisprudencia , Historia del Siglo XX , Salud Pública/economía , Salud Pública/educación , Salud Pública/historia , Salud Pública/legislación & jurisprudencia , Política Pública/economía , Política Pública/historia , Política Pública/legislación & jurisprudencia , Suecia/etnología
17.
Curr Anthropol ; 50(1): 75-89; discussion 89-101, 2009 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19579356

RESUMEN

Indigenous community leaders and conservationists in Oaxaca, Mexico, believe that deforestation causes streams to dry up and threatens rainfall, authorizing popular mobilizations against industrial logging. This belief was produced by a combination of indigenous beliefs in nature spirits and early-twentieth-century state-sponsored desiccation theory, which was brought to the Valley of Mexico in the 1920s. Desiccation theory acquires political significance because it allows rural people to build political and epistemic alliances that bypass industrial forestry institutions and find sympathetic urban audiences and environmentalist allies, undermining state claims to reason and scientific authority. These alliances require the skillful translation and mistranslation of local environmental concerns by activists and conservationists, who link the concerns of urban audiences with those of rural people. Popular beliefs about climate and forests in Mexico structure the authority and credibility of the state and will powerfully affect efforts to protect forests to mitigate climate change.


Asunto(s)
Conservación de los Recursos Naturales/legislación & jurisprudencia , Agricultura Forestal/legislación & jurisprudencia , Gobierno , Grupos de Población/legislación & jurisprudencia , Espiritualidad , Antropología Cultural , Conservación de los Recursos Naturales/historia , Contaminación Ambiental , Etnicidad , Agricultura Forestal/historia , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Industrias/historia , Industrias/legislación & jurisprudencia , México , Modelos Teóricos , Abastecimiento de Agua
18.
Conserv Biol ; 20(2): 277-87, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16903089

RESUMEN

In the 1990s the federal forests in the Pacific Northwest underwent the largest shift in management focus since their creation, from providing a sustained yield of timber to conserving biodiversity, with an emphasis on endangered species. Triggered by a legal challenge to the federal protection strategy for the Northern Spotted Owl (Strix occidentalis caurina), this shift was facilitated by a sequence of science assessments that culminated in the development of the Northwest Forest Plan. The plan, adopted in 1994, called for an extensive system of late-successional and riparian reserves along with some timber harvest on the intervening lands under a set of controls and safeguards. It has proven more successful in stopping actions harmful to conservation of old-growth forests and aquatic systems than in achieving restoration goals and economic and social goals. We make three suggestions that will allow the plan to achieve its goals: (1) recognize that the Northwest Forest Plan has evolved into an integrative conservation strategy, (2) conserve old-growth trees and forests wherever they occur and (3) manage federal forests as dynamic ecosystems.


Asunto(s)
Conservación de los Recursos Naturales/legislación & jurisprudencia , Conservación de los Recursos Naturales/métodos , Ecosistema , Agricultura Forestal/historia , Árboles , Agricultura Forestal/legislación & jurisprudencia , Historia del Siglo XX , Historia del Siglo XXI , Noroeste de Estados Unidos
19.
Conserv Biol ; 20(2): 288-96, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16903090

RESUMEN

Development of the Northwest Forest Plan (NWFP) was motivated by concerns about the over-harvest of late-seral forests and the effects of intensive forest management on the long-term viability of the Northern Spotted Owl (Strix occidentalis caurina). Following several years of intense political and legal debates, the final NWFP was approved in 1994. Even though the plan evolved with a broad ecosystem perspective, it remained anchored in the Spotted Owl reserve design proposed in 1990. Based on a criterion of stable or increasing populations, a decade later it remains unclear whether the enactment of the NWFP has improved the conservation status of Spotted Owls. The results of intensive monitoring of several Spotted Owl populations for over a decade suggest a continuing range-wide decline even though rates of timber harvest have declined dramatically on federal lands. The cause of the decline is difficult to determine because the research needed to establish cause and effect relations has not been done. One plausible hypothesis is that the owl's life history greatly constrains its rate of population growth even when habitat is no longer limiting. Since enactment of the NWFP, new threats have arisen, including the movement of Barred Owls (S. varia) into the range of the Spotted Owl, political pressure to increase levels of timber harvest, and recent changes to forest laws that eliminate the requirement to assess the viability of wildlife populations on U.S. Department of Agriculture Forest Service lands. At this time is appears that Spotted Owl conservation rests critically on continued implementation of the protections afforded by the NWFP and the U.S. Endangered Species Act.


Asunto(s)
Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/métodos , Ecosistema , Agricultura Forestal/organización & administración , Estrigiformes , Árboles , Animales , Conservación de los Recursos Naturales/legislación & jurisprudencia , Agricultura Forestal/historia , Historia del Siglo XX , Noroeste de Estados Unidos , Tiempo (Meteorología)
20.
Conserv Biol ; 20(2): 297-305, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16903091

RESUMEN

The Marbled Murrelet (Brachyramphus marmoratus) was listed as threatened in 1992, primarily because of loss of its old-forest nesting habitat. Monitoring conducted over the first 10 years following implementation of the Northwest Forest Plan shows at-sea murrelet populations appear to be stationary, but recruitment is very low and demographic models project a 4-6% annual rate of decline. Monitoring of nesting habitat indicated there were about 1.6 million ha of higher-suitability nesting habitat on all lands at the start of the plan, about half of which occurred on federal lands. Most (88%) of higher-suitability habitat on federal lands was protected within reserves. Over the past 10 years, losses of habitat due primarily to fire have totaled about 2% on federal lands. Losses have been much greater (12%) on nonfederal lands, due primarily to timber harvest. Habitat is expected to accrue within reserves as younger forest matures and attains sufficient diameter to support nesting sites. At-sea estimates of population size are strongly and positively correlated with amounts of adjacent nesting habitat at a broad scale, supporting the idea that amounts of nesting habitat are a primary driver in wide-scale murrelet population distribution. Conditions at sea, however such as temperature regimes, prey availability, and pollutants, continue to affect murrelet populations. The system of large reserves seems to have achieved the short-term objective of conserving much of the remaining nesting habitat on federal lands. These reserves are also likely to contribute to the long-term objective of creating large, contiguous blocks of nesting habitat. The plan has a primary role in conserving and restoring nesting habitat on federal land but will succeed in this role only if land allocations calling for such protection are in place for many decades.


Asunto(s)
Conservación de los Recursos Naturales/métodos , Ecosistema , Agricultura Forestal/organización & administración , Passeriformes , Árboles , Animales , Conservación de los Recursos Naturales/historia , Conservación de los Recursos Naturales/legislación & jurisprudencia , Historia del Siglo XX , Historia del Siglo XXI , Noroeste de Estados Unidos
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