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SPATIAL AND TEMPORAL PATTERNS OF SOIL BIOLOGICAL ACTIVITY IN A FOREST AND AN OLD
 

Summary: SPATIAL AND TEMPORAL PATTERNS OF SOIL
BIOLOGICAL ACTIVITY IN A FOREST AND AN OLD
FIELD
JOSEF H. GOČ RRES*, MARNIE J. DICHIARO{, JODI B. LYONS and
JOSEÂ A. AMADOR
Department of Natural Resources Science, University of Rhode Island, Kingston, RI 02881, U.S.A.
(Accepted 9 March 1997)
SummaryĐThe spatial distribution of C mineralization, nematode density, organic matter content and
soil moisture were determined for a forest and an old Želd soil in the northeastern U.S.A. over the
course of a year. The data were analyzed using univariate, multivariate and geostatistical methods. The
forest soil had a higher C mineralization rate, soil moisture content and nematode density than the old
Želd soil throughout the year. High C mineralization rates and nematode density coincided with a brief
January thaw in the forest, but not in the old Želd soil. Multiple regression analysis identiŽed dierent
components as signiŽcant for C mineralization depending on sampling date. In the old Želd, soil moist-
ure and organic matter content were signiŽcant regression components for C mineralization at dierent
times of the year. In the forest, organic matter, root mass (>2 mm) and bulk density were signiŽcant
regression components on dierent dates. For nematodes, the multiple regression analysis identiŽed soil
moisture and bulk density as signiŽcant in both soils at dierent times of the year. Maps for each prop-
erty were estimated with block kriging for each sampling date. In the forest, areas of maximal C miner-
alization and nematode density coincided with areas of high organic matter and moisture content only

  

Source: Amador, José A. - Department of Natural Resources Science, University of Rhode Island

 

Collections: Environmental Management and Restoration Technologies; Environmental Sciences and Ecology