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Displaying 1521 - 1525 of 1605Abrupt change of runoff and its major driving factors in Haihe River Catchment, China
Runoff in Haihe River Catchment of China is steadily declining due to climate change and human activity. Determining abrupt changes in runoff could enhance identification of the main driving factors for the sudden changes. In this study, the sequential Mann-Kendall test analysis is used to determine abrupt changes in runoff in eight sub-catchments of Haihe River Catchment, while trend analysis via the traditional Mann-Kendall test for the period 1960-1999 is used to identify the basic trend of precipitation and runoff.
Response of soil microbial and invertebrate communities to tracked vehicle disturbance in tallgrass prairie
Soil biota drive fundamental ecosystem processes such as decomposition, nutrient cycling, and maintenance of soil structure. They are especially active in grassland ecosystems such as the tallgrass prairie, where much of the net primary productivity is allocated belowground and ultimately processed by heterotrophic soil organisms.
Estimation of critical nutrient amounts based on input-output analysis in an agriculture watershed of eastern China
The concept of critical nutrient amounts (CNA) for a watershed was developed to address eutrophication in surface waters from diffuse (non-point) source pollution. CNA is defined as the maximum allowable applied or generated amount (AGA) of a nutrient from natural and human sources that can be emitted and still allow compliance with water quality standards.
Conflicts as enhancers or barriers to the management of privately owned common land: A method to analyze the role of conflicts on a regional basis
Communal forests, or Montes Veciñais en Man Común (MVMC), are a specific form of communal land tenure and a singular legal category in Galicia, a region in Northwest Spain. MVMC extend over one third of the area of the region. Over the years, MVMC have undergone many changes in terms of ownership and resource management. Such changes have resulted in land tenure insecurity among current landowners, who live in rural areas.
Response of orthopteran diversity to abandonment of semi-natural meadows
The response of orthopteran communities to abandonment of extensively managed hay meadows was investigated in an Alpine region. Fifty-five sites in four different successional stages were sampled: (i) mown meadows, (ii) young abandoned meadows, (iii) old abandoned meadows, and (iv) young forests. Mown meadows and young abandoned meadows (3-5 years since the last cut) had the highest, young forests the lowest mean number of orthopteran species.