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Author Penton, C. Ryan ♦ Newman, Susan
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher American Society of Agronomy
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Social sciences ♦ Sociology & anthropology ♦ Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Biochemistry ♦ Natural history of organisms ♦ Technology ♦ Medicine & health ♦ Human physiology ♦ Pharmacology and therapeutics ♦ Diseases ♦ Agriculture & related technologies ♦ Techniques, equipment & materials
Subject Domain (in MeSH) Eukaryota ♦ Organisms ♦ Enzymes and Coenzymes ♦ Chemicals and Drugs ♦ Biological Phenomena ♦ Biological Sciences ♦ Social Sciences ♦ Anthropology, Education, Sociology and Social Phenomena ♦ Geographic Locations ♦ Geographic Locations
Subject Keyword Discipline Environmental Health ♦ Enzymes ♦ Metabolism ♦ Resource Allocation ♦ Wetlands ♦ Florida ♦ Poaceae ♦ Journal Article ♦ Research Support, Non-u.s. Gov't
Abstract Enzyme catalyzed reactions are generally considered the rate-limiting step in organic matter degradation and may be significantly influenced by the structure and composition of plant communities. Changes in these rates have the potential to effect long-term peat accumulation and influence the topography of a wetland ecosystem. To determine habitat influences on enzyme activities, we examined slough and sawgrass plots within enriched and reference phosphorus (P) sites in the Everglades. Assays were performed for the enzymes involved in carbon (C), nitrogen (N), and P cycling and lignin depolymerization. Enzyme activities were normalized and analyzed in terms of a resource allocation strategy. Plant composition was found to significantly alter the allocation of enzymatic resources due to varying substrate complexities. Potential decomposition in the slough was less influenced by lignin than in the sawgrass habitats. Additionally, an index relating hydrolytic and oxidative enzymes was significantly greater in the slough habitats, whereas C/N ratios were significantly lower. These indices suggest more favorable decomposition conditions and thus slower peat accretion within the slough communities, which may contribute to the development of elevation differences within the sawgrass ridge and slough topography of the Everglades.
Spatial Coverage Florida
Description Country affiliation: United States
Author Affiliation: Penton CR ( Soil and Water Science Department, University of Florida, IFAS, Gainesville, FL 32611, USA.
ISSN 00472425
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-05-01
Publisher Place United States
e-ISSN 15372537
Journal Journal of Environment Quality
Volume Number 37
Issue Number 3

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Source: WHO-Global Index Medicus