Dr. Abbasali Sanadgol is an associate professor in rangelands and forests research institute, IRAN, He is retired now. He earned his undergraduate and master degrees in natural resources and range management in 1976 and 1992 respectively from natural resources faculty of Tehran University and worked as a natural resources and range management researcher for 29 years at education and research ag...

1. introduction the meaning of sustainability is an effort to reach the best results in human and environmental programs which are considered to be for present and future. zayandeh-rud is the most important and vital river in esfahan area which is used in agriculture, industry, providing drinking water and all other economic sectors. this river is originated from the zagros mountains – zardkooh...

Hann, Wendel J.; Wisdom, Michael J.; Rowland, Mary M. 2003. Disturbance departure and fragmentation of natural systems in the interior Columbia basin. Res. Pap. PNW-RP-545. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 19 p. We integrated landscape data from science assessments of the interior Columbia basin (basin) into one variable that func...

Nevada. The speakers, their affi liations, and topics are listed in the sidebar. Two important concepts emerged from the presentations and discussions. First, the ecological concepts and assumptions that underlie the development and implementation of ESDs are undergoing revision at a rapid pace. Most importantly, the assumption that reconstructing the ecological dynamics of a group of similar s...

www.frontiersinecology.org © The Ecological Society of America R – including grasslands, shrublands, savannas, deserts, prairies, steppe, and tundra – comprise 30–40% of Earth’s ice-free terrestrial surface (depending on one’s definition and data sources; Asner et al. 2004) and account for 91% of the world’s grazing lands (Reid et al. 2008). Encompassing watersheds for vast downstream populatio...

natural landscape alternation is a problem that has been under debate for a long time. landutilization techniques like agriculture, forest and rangelands, residential and urban are amonginfluential criteria affecting erosion severity and sediment yield in a given region. in this respect,land management is a promising option to mitigate it. thus, acquaintance with quantitative soilerosion owing ...

Rangelands are uncultivated lands that include grasslands, savannahs, steppes, shrub lands, deserts and tundra. The native vegetation on rangelands is predominantly grasses, forbs and shrubs (Kothmann, 1974). Rangelands cover 31 percent of the land surface area of the United States (Havstad et al., 2009), and up to half of the land surface area worldwide (Lund, 2007). Most land areas that are n...

Mountain pocket gophers (Thomomy's talpoides) and plains pocket gophers (Geomys bursarius) are a problem to rangelands in Colorado. A new chlorophacinone (50 ppm) pelleted bait was applied to active burrow systems by hand baiting. Efficacy on the Geomys plot was 100%, while 94.73% of the Thomomys were controlled with the product. Introduction Pocket gophers, of the family Geomyidae, are indigen...