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40438 
Journal Article 
The influence of functional diversity and composition on ecosystem processes 
Tilman, D; Knops, J; Wedin, D; Reich, P; Ritchie, M; Siemann, E 
1997 
Yes 
Science
ISSN: 0036-8075
EISSN: 1095-9203 
277 
5330 
1300-1302 
National Science Foundation; Andrew Mellon Foundation. Humans are modifying both the identities and numbers of species in ecosystems, but the impacts of such changes on ecosystem processes are controversial. Plant species diversity, functional diversity, and functional composition were experimentally varied in grassland plots. Each factor by itself had significant effects on many ecosystem processes, but functional composition and functional diversity were the principal factors explaining plant productivity, plant percent nitrogen, plant total nitrogen, and light penetration. Thus, habitat modifications and management practices that change functional diversity and functional composition are likely to have large impacts on ecosystem processes. 
NAAQS
• ISA NOxSOxPM Ecology (2018)
     Cited in First Draft
          Chapter 6
     Cited in the Second Draft
          Appendix 6
• ISA NOxSOxPM Ecology (2020- Final Project Page)
     Cited
          Appendix 6