Now showing items 11-20 of 26
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 ...
Carbon dioxide and water vapor exchange in a warm temperate grassland
(Springer-Verlag, 2004-01)
Grasslands cover about 40% of the ice-free global terrestrial surface, but their contribution to local and regional water and carbon fluxes and sensitivity to climatic perturbations such as drought remains uncertain. Here, ...
Potent cytotoxins produced by a microbial symbiont protect host larvae from predation
(Springer-Verlag, 2004-03)
Larvae of the sessile marine invertebrate Bugula neritina (Bryozoa) are protected by an effective chemical defense. From the larvae, we isolated three bryostatin-class macrocyclic polyketides, including the novel bryostatin ...
Lingual deficits in neurotrophin double knockout mice
(Kluwer Academic Publishers; Springer Science + Business Media, Inc., 2004-12)
Brain-derived neurotrophic factor (BDNF) and Neurotrophin 3 (NT-3) are members of the neurotrophin family and are expressed in the developing and adult tongue papillae. BDNF null-mutated mice exhibit specific impairments ...
Dissolution of wollastonite during the experimental manipulation of Hubbard Brook Watershed 1
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-02)
Powdered and pelletized wollastonite (CaSiO 3 ) was applied to an 11.8 ha forested watershed at the Hubbard Brook Experimental Forest (HBEF) in northern New Hampshire, U.S.A. during October of 1999. The dissolution of ...
ENHANCER of TRY and CPC 2 ( ETC2 ) reveals redundancy in the region-specific control of trichome development of Arabidopsis
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-05)
>An evolutionarily conserved set of proteins consisting of MYB and bHLH transcription factors and a WD40 domain protein is known to act in concert to control various developmental processes including trichome and root hair ...
Microbial community utilization of recalcitrant and simple carbon compounds: impact of oak-woodland plant communities
(Springer-Verlag, 2004-01)
Little is known about how the structure of microbial communities impacts carbon cycling or how soil microbial community composition mediates plant effects on C-decomposition processes. We examined the degradation of four ...
Microbial Community Structure and Oxidative Enzyme Activity in Nitrogen-amended North Temperate Forest Soils
(Springer-Verlag; Spreinger-Verlag, 2004-10)
Large regions of temperate forest are subject to elevated atmospheric nitrogen (N) deposition which can affect soil organic matter dynamics by altering mass loss rates, soil respiration, and dissolved organic matter ...
Macrophage response to Mycobacteriumtuberculosis infection
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2004-02)
The immune response to Mycobacteriumtuberculosis (Mtb) infection is the formation of multicellular lesions, or granolomas, in the lung of the individual. However, the structure of the granulomas and the spatial distribution ...
Larval cannibalism, time constraints, and adult fitness in caddisflies that inhabit temporary wetlands
(Springer-Verlag, 2004-01)
The fitness of non-feeding adult insects depends on energy accumulated during the larval stage. Larvae of the caddisfly Asynarchus nigriculus primarily feed on plant detritus, but supplement their diet with animal material ...