پیشرفت نسبت به ارزیابی یکنواخت و گزارش از اختلال خاک برای انجام عملیات، تحقیق، و پروتکل های پایداری
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|6898||2005||14 صفحه PDF||سفارش دهید||7921 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Forest Ecology and Management, Volume 220, Issues 1–3, 10 December 2005, Pages 17–30
International protocols, such as those of the Montreal Process (MP), specify desired outcomes without specifying the process and components required to attain those outcomes. We suggest that the process and its components are critical to achieve desired outcomes. We discuss recent progress in northwestern North America, on three topics that will facilitate development of and reporting in sustainability protocols: (1) common terms and comparable guidelines for soil disturbance, (2) cost-effective techniques for monitoring and assessing soil disturbance, and (3) improved methods to rate soils for risk of detrimental soil disturbance. Uniform terms for soil disturbance will facilitate reporting and exchange of information. Reliable monitoring techniques and tracking the consequences of soil disturbance for forest growth and hydrology are paramount for improving understanding and predictions of the practical consequences of forest practices. To track consequences, we urge creation of regional research and operations databases that can be used to: (1) address MP values, (2) define detrimental soil disturbances, (3) develop risk rating systems for operational application, and (4) improve best management practices (BMPs) and ameliorative treatments that avoid or correct detrimental disturbances.
Sustainable management of forests requires maintenance of the soil resource including its biological, chemical and physical properties and processes. This dependency is addressed at many levels (scales): at a local and regional level through operational guidelines and standards, and more recently at national and international levels through sustainability protocols (e.g., criteria and indicators of the Montreal Process) and third-party certification. The Montreal Process (MP) included a Working Group on Criteria and Indicators for the Conservation and Sustainable Management of Temperate and Boreal Forests (Montréal Process Working Group, 1997). The MP is supported by 12 non-European countries covering 5 continents and representing 90% of the world's temperate and boreal forests. A major purpose of the Montreal Process, and the similar Pan European (formerly the Helsinki Agreement), is to provide a common framework for describing, assessing, and evaluating each member country's progress towards forest sustainability. Indicators will be used to describe, assess and evaluate progress. Two of the MP indicators for the conservation and maintenance of soil and water resources refer to area and percent of forestland with significantly diminished soil organic matter (indicator 21) or significant compaction (indicator 22) (Montréal Process Working Group, 1997). Clearly, we need to define what is “significant”. Moreover, we need to validate an underlying assumption that we know what amount of organic matter loss or severity of compaction will lower forest productivity, and where and to what extent. The MP clearly identifies indicators 21 and 22 as “b-type” indicators, which “may require the gathering of new or additional data and/or a new program of systematic sampling or basic research”. Yet, some entities (national organizations/agencies), including some in the USA, are monitoring or sampling compaction before “significant” changes in compaction levels have been reliably defined or validated. In the USA, the current response to the MP for federal forestland is to utilize the existing systematic grid of forest inventory plots as the sampling matrix, then estimate extent of compaction at these sample locations. Responsibility for responding to the MP and to the larger Forest Health issue has largely been assigned to the USFS Forest Inventory and Assessment Group (FIA). To help guide this large effort, we strongly recommend soil scientists participate in the processes and review results reported to the Montreal Process by Technical Advisory Committees (TACs) and the FIA. Of highest priority, is to quantify the practical consequences of changes in soil physical properties and soil organic matter that are important for sustainable forestry. One approach to addressing “b-type indicators” is to use locally applicable standards as proxies and then ensure adequate validation occurs to confirm that existing guidelines and standards adequately address the intent of the indicator. This is the process adopted by the Canadian Council of Forest Ministers’ in their criteria and indicators for sustainable forest management, which was developed in part to address the MP (CCFM, 2000 and CCFM, 2003). For soil disturbance, the various Canadian provinces are now reporting out on their level of compliance with locally applicable guidelines, which is a proxy for the related MP indicators. These guidelines address the amount of an operating area that can have specific disturbance types, such as different types of ruts, compacted trails, and displacement. Commensurate with use of guidelines and standards as proxies is the paramount need to test and adapt these guidelines and standards in a reliable continual improvement (adaptive management) framework. This is complicated by the fact that each jurisdiction has different disturbance types that are targeted by their guidelines. No clear linkages have been established between changes in specific soil properties and productivity or sustainability, except in extreme disturbance cases. Therefore, what valid inferences or conclusions can be drawn from a national inventory of the status of soil properties in forested areas as proposed by the Montreal Process? How could inferences from such inventory data improve sustainable forestry? We suggest a more promising approach is to: (a) inventory the percentage of forested land that is controlled by other legislative or voluntary processes, such as state or provincial forestry practice codes, Sustainable Forestry Initiative (American Forest and Paper Association), Canadian Standards Association, Forest Stewardship Council, ISO 1400.1, and federal legislation (National Forest Management Act of 1976 and National Environmental Policy Act of 1969); (b) ensure that interactive regional databases are developed to facilitate information exchange and document severities of soil disturbance that are detrimental to forest productivity across the range of soils and conditions where production forestry is practiced. Existing codes, legislative acts, and voluntary agreements have documented procedures, standards, and guidelines for protecting and maintaining forest productivity. Most also seek continual improvement of processes, guidelines, and standards. Regional databases should provide the information from which detrimental soil disturbances can be defined. Best management practices (BMPs) and ameliorative treatments can subsequently be prescribed to avoid or correct disturbances that are deemed detrimental. The Montreal Process indicates some desired outcomes (indicators) without describing the processes to achieve them. Presumably, individual countries will decide the process. We believe the adaptive management process (continuous improvement) that is used to achieve sustainability is more important than MP indicators. Further, by employing common terminology, definitions, and approaches we can reduce the burden of demonstrating sustainability. Progress towards a common approach starts at the regional level. While most organizations have different approaches and priorities, many have similar settings and environmental issues. Therefore, it is appropriate to coordinate and cooperate on issues of sustainability. Within a region, this cooperation can result in common BMPs, tools, and databases, in which research results are tracked, summarized, and put into an operational context for successful application. In this paper, we discuss recent regional progress in northwestern North America, on three topics that will facilitate reporting under various sustainability protocols: A. Common terms and comparable guidelines for soil disturbance. B. Cost-effective techniques for monitoring and assessing soil disturbance. C. Reliable methods to rate soils for risk of detrimental soil disturbance.
نتیجه گیری انگلیسی
A more uniform and coordinated approach to soil disturbance is needed. This approach will clarify and support development and reporting of indicators of sustainable forestry, such as those outlined in the Montreal Process. In this paper, we discussed recent regional progress in northwestern North America, on three topics that facilitate reporting under various sustainability protocols: (1) common terms and comparable guidelines for soil disturbance, (2) cost-effective techniques for monitoring and assessing soil disturbance, and (3) improved methods to rate soils for risk of detrimental soil disturbance. To accelerate progress at the regional scale, we require synthesis of regional data about soil disturbance, tree growth, and hydrologic response. Assembling information in a workable database will facilitate tracking and relating ecosystem response to practical indices of sustainability. Also at the national and international levels, we need to pursue correlation and commonality in disturbance terms and practical standards. Common disturbance types are most desirable, but we must recognize the need to vary when disturbance types are “counted” and how they are surveyed on all sites of varying sensitivity. At all scales, we need to develop a reliable and adaptive process (continuous improvement) for monitoring and managing soil disturbance and its effects on-site productivity. Components and some timelines for this process were discussed by Curran et al. (in revision). We think the process and its components are critical for achieving the desired outcomes (Fig. 2). Although we report progress on several of those components, we believe that quantifying and documenting the consequences of soil disturbance for forest growth in regional databases is paramount. Regional databases should document consequences and the activity–soil–site conditions where these consequences were measured. With such databases, we can better understand and predict the practical consequences of management practices and soil disturbance. Moreover, we can more efficiently contribute to continuous improvement of BMPs, training, and guidelines. Although the Montreal Process seeks to ensure sustainable forestry, the MP specifies the “desired outcome” without specifying the process and components required to attain that outcome. We strongly recommend soil scientists help develop the process and critically review results reported to the Montreal Process by Technical Advisory Committees and the USFS Forest Inventory and Assessment Group.