Now showing items 1-10 of 23
Microbial Cycling of C and N in Northern Hardwood Forests Receiving Chronic Atmospheric NO 3 − Deposition
(Springer-Verlag; Springer Science+Business Media, Inc., 2006-03)
Sugar maple ( Acer saccharum Marsh.)-dominated northern hardwood forests in the upper Lakes States region appear to be particularly sensitive to chronic atmospheric NO 3 − deposition. Experimental NO 3 − deposition (3 g ...
Conservation of biodiversity in coffee agroecosystems: a tri-taxa comparison in southern Mexico
(Kluwer Academic Publishers-Plenum Publishers; Kluwer Academic Publishers ; Springer Science+Business Media, 2003-06)
We compare species richness of birds, fruit-feeding butterflies and ground-foraging ants along a coffee intensification gradient represented by a reduction in the number of species of shade trees and percentage of shade ...
Seasonal changes in the respiratory electron transport system (ETS) and respiration of the zebra mussel, Dreissena polymorpha in Saginaw Bay, Lake Huron
(Kluwer Academic Publishers; Springer Science+Business Media, 2001-04)
Electron transport system activity (ETS) and respiration rates (R) of the zebra mussel, Dreissena polymorpha , were determined monthly from April to November over 2 years at two sites in Saginaw Bay, Lake Huron. The sites ...
Fungal community composition and metabolism under elevated CO 2 and O 3
(Springer-Verlag, 2006-02)
Atmospheric CO 2 and O 3 concentrations are increasing due to human activity and both trace gases have the potential to alter C cycling in forest ecosystems. Because soil microorganisms depend on plant litter as a source ...
Coastal eutrophication assessment in the United States
(Kluwer Academic Publishers; Springer Science+Business Media, Inc., 2006-04-21)
Recent national assessments document that nitrogen-driven coastal eutrophication is widespread and increasing in the United States. This significant coastal pollution problem includes impacts including increased areas and ...
Using normative scenarios in landscape ecology
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-05)
The normative landscape scenario is one of many types of scenario methods that are used by landscape ecologists. We describe how normative landscape scenarios are different from other types and how these differences create ...
Land use and forest cover on private parcels in the Upper Midwest USA, 1970 to 1990
(Kluwer Academic Publishers; Springer Science+Business Media, 2003-11)
This paper analyzes the interactions between land use and forest cover in the Upper Midwest, USA from 1970 to 1990. New data are presented and interpreted to evaluate the effects of land-use changes, especially abandonment ...
Impacts of major predators on tropical agroforest arthropods: comparisons within and across taxa
(Springer-Verlag, 2004-06)
In food web studies, taxonomically unrelated predators are often grouped into trophic levels regardless of their relative importance on prey assemblages, multiple predator effects, or interactions such as omnivory. Ants ...
Sources of reactive nitrogen affecting ecosystems in Latin America and the Caribbean: current trends and future perspectives
(Kluwer Academic Publishers; Springer Science+Business Media, Inc., 2006-04-06)
While the amount of reactive nitrogen circulating at the global level has increased markedly in the last century, the effects of this increase are largely seen at the regional level due to interacting ecological and ...
Anthropogenic N deposition and the fate of 15 NO 3 − in a northern hardwood ecosystem
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-06)
Human activity has substantially increased atmospheric NO 3 − deposition in many regions of the Earth, which could lead to the N saturation of terrestrial ecosystems. Sugar maple ( Acer saccharum Marsh.) dominated northern ...