02593nas a2200181 4500008004100000245009500041210006900136300001400205490000700219520193100226100002202157700002302179700002002202700002402222700002202246700002402268856011902292 2004 eng d00aVariation in biogeochemistry and soil biodiversity across spatial scales in a polar desert0 aVariation in biogeochemistry and soil biodiversity across spatia a3105-31180 v853 a
Desert ecosystems are characterized by distinct spatial patterning in soil
biogeochemistry and biodiversity. In the Antarctic Dry Valleys, soil polygons are prominent
features of the landscape and may be key units for scaling local ecological information to
the greater region. We examined polygon soils in each of the three basins of Taylor Valley,
Antarctica. Our objectives were to characterize variability in soil biogeochemistry and
biodiversity at local to regional scales, and to test the influence of soil properties upon
invertebrate communities. We found that soil biogeochemical properties and biodiversity
vary over multiple spatial scales from fine (,10 m) to broad (.10 km) scales. Differences
in biogeochemistry were most pronounced at broad scales among the major lake basins of
Taylor Valley corresponding to differences in geology and microclimate, while variation
in invertebrate biodiversity and abundance occurred at landscape scales of 10–500 m, and
within individual soil polygons. Variation in biogeochemistry and invertebrate communities
across these scales reflects the influence of physical processes and landscape development
over ecosystem structure in the dry valleys. The development of soil polygons influences
the spatial patterning of soil properties such as soil organic matter, salinity, moisture, and
invertebrate habitat suitability. Nematode abundance and life history data indicate that
polygon interiors are more suitable habitats than soils in the troughs at the edges of polygons.
These data suggest that physical processes (i.e., polygon development) and biogeochemistry
are important influences on the spatial variability of biotic communities in dry valley soil
ecosystems.
1 aBarrett, John, E.1 aVirginia, Ross, A.1 aWall, Diana, H.1 aParsons, Andrew, N.1 aPowers, Laura, E.1 aBurkins, Melody, B. uhttps://mcm.lternet.edu/content/variation-biogeochemistry-and-soil-biodiversity-across-spatial-scales-polar-desert00556nas a2200133 4500008004100000245010600041210006900147300001200216490000600228100002400234700002300258700002000281856012100301 2001 eng d00aOrganic carbon cycling in Taylor Valley, Antarctica: Quantifying soil reservoirs and soil respiration0 aOrganic carbon cycling in Taylor Valley Antarctica Quantifying s a113-1250 v71 aBurkins, Melody, B.1 aVirginia, Ross, A.1 aWall, Diana, H. uhttps://mcm.lternet.edu/content/organic-carbon-cycling-taylor-valley-antarctica-quantifying-soil-reservoirs-and-soil00594nas a2200157 4500008004100000245009500041210006900136300001400205490000700219653001100226100002400237700002300261700002200284700002000306856011000326 2000 eng d00aThe Origin of Soil Organic Matter in Taylor Valley, Antarctica: A Legacy of Climate Change0 aOrigin of Soil Organic Matter in Taylor Valley Antarctica A Lega a2377-23910 v8110alegacy1 aBurkins, Melody, B.1 aVirginia, Ross, A.1 aChamberlain, Page1 aWall, Diana, H. uhttps://mcm.lternet.edu/content/origin-soil-organic-matter-taylor-valley-antarctica-legacy-climate-change00878nas a2200277 4500008004100000245006500041210006400106260001200170300001200182490000700194653002300201100002400224700001700248700002400265700002000289700002100309700002100330700002400351700002400375700002400399700002100423700002000444700002400464700002300488856008900511 1999 eng d00aPhysical controls on the Taylor Valley Ecosystem, Antarctica0 aPhysical controls on the Taylor Valley Ecosystem Antarctica c12/1999 a961-9720 v4910aWater availability1 aFountain, Andrew, G1 aLyons, Berry1 aBurkins, Melody, B.1 aDana, Gayle, L.1 aDoran, Peter, T.1 aLewis, Karen, J.1 aMcKnight, Diane, M.1 aMoorhead, Daryl, L.1 aParsons, Andrew, N.1 aPriscu, John, C.1 aWall, Diana, H.1 aWharton, Robert, A.1 aVirginia, Ross, A. uhttps://mcm.lternet.edu/content/physical-controls-taylor-valley-ecosystem-antarctica00628nas a2200145 4500008004100000245013100041210006900172300001200241490000700253100002400260700002200284700002300306700002400329856012900353 1998 eng d00aNatural abundance of carbon and nitrogen isotopes in potential sources of organic matter to soils of Taylor Valley, Antarctica0 aNatural abundance of carbon and nitrogen isotopes in potential s a209-2100 v311 aBurkins, Melody, B.1 aChamberlain, Page1 aVirginia, Ross, A.1 aFreckman, Diana, W. uhttps://mcm.lternet.edu/content/natural-abundance-carbon-and-nitrogen-isotopes-potential-sources-organic-matter-soils-taylor00531nas a2200145 4500008004100000245007300041210006900114300000800183490000700191100002400198700002300222700002400245700002200269856009400291 1997 eng d00aCarbon cycling in soils of the McMurdo Dry Valley region, Antarctica0 aCarbon cycling in soils of the McMurdo Dry Valley region Antarct a2300 v781 aBurkins, Melody, B.1 aVirginia, Ross, A.1 aFreckman, Diana, W.1 aChamberlain, Page uhttps://mcm.lternet.edu/content/carbon-cycling-soils-mcmurdo-dry-valley-region-antarctica