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Rx burn1.JohnMcGuire.jpg
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RX FIRE_credit John Mcguire_high res.jpg
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The 800-acre Buck Lake Wildfire began in the Buck Lake Conservation Area, Florida on February 21, 2011. Credit: John Mcguire
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Rye King Freshwater Invertebrates.pdf
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Saarinen Taskinen 2003.pdf
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Saarinen Taskinen 2004.pdf
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Saarinen Taskinen 2005.pdf
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Safe Havens, Safe Passages for Vulnerable Fish and Wildlife
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Some of the best-known and most-cherished mountains on Earth are set in the
Canadian Rockies of British Columbia and Alberta. Indeed, the mention of
Banff, Jasper, Kootenay or Yoho National Parks evokes images of snow-capped
peaks, thundering falls and turquoise waters, numerous natural wonders and
majestic wildlife. The adjoining Provincial Parks in British Columbia – Mount
Robson, Mount Assiniboine, and Hamber – are just as spectacular, if not quite
as renowned. Waterton Lakes National Park in Alberta and Glacier National
Park in Montana – brought together in 1931 as an International Peace Park by
the respective Rotary Clubs – exemplify international cooperation and wilderness
and wildlife without borders. All 9 of these parks have been designated as
World Heritage Sites in recognition of their outstanding natural importance to
the common heritage of humanity.
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Sagebrush Biome Framework
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This framework for 2021-2025 reflects collaborative, multi-state planning efforts to update SGI 2.0, and continues to build from a decade of success conserving the sagebrush biome. This framework also serves as NRCS’ ongoing contribution to the Sagebrush Conservation Strategy administered by Western Association of Fish and Wildlife Agencies. Sharing common cross-boundary threats, NRCS staff across eleven western states collaborated to create this shared vision for conservation action.
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Sagebrush carrying out hydraulic lift enhances surface soil nitrogen cycling and nitrogen uptake into inflorescences
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Plant roots serve as conduits for water flow not only from soil to leaves but also from wetter to drier soil. This hydraulic redistribution through root systems occurs in soils worldwide and can enhance stomatal opening, transpiration, and plant carbon gain. For decades, upward hydraulic lift (HL) of deep water through roots into dry, litter-rich, surface soil also has been hypothesized to enhance nutrient availability to plants by stimulating microbially controlled nutrient cycling. This link has not been demonstrated in the field. Working in sagebrush-steppe, where water and nitrogen limit plant growth and reproduction and where HL occurs naturally during summer drought, we slightly augmented deep soil water availability to 14 HL+ treatment plants throughout the summer growing season. The HL+ sagebrush lifted greater amounts of water than control plants and had slightly less negative predawn and midday leaf water potentials. Soil respiration was also aug- mented under HL+ plants. At summer’s end, application of a gas- based 15N isotopic labeling technique revealed increased rates of nitrogen cycling in surface soil layers around HL+ plants and increased uptake of nitrogen into HL+ plants’ inflorescences as sagebrush set seed. These treatment effects persisted even though unexpected monsoon rainstorms arrived during assays and increased surface soil moisture around all plants. Simulation models from ecosystem to global scales have just begun to include effects of hydraulic redistribution on water and surface energy fluxes. Results from this field study indicate that plants carrying out HL can also substantially enhance decomposition and nitrogen cycling in surface soils.
rhizosphere | flowering | seed production
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Saha Layzer 2008.pdf
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