| one publication added to basket [67169] | Effects of nitrogen and phosphorus availability on the decomposition of aquatic plants
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522, more
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| Keywords |
Chemical elements > Nonmetals > Atmospheric gases > Nitrogen
Chemical elements > Nonmetals > Phosphorus
Chemical reactions > Degradation
Flora > Aquatic organisms > Aquatic plants
Eichhornia crassipes (Mart.) Solms [WoRMS]
China, People's Rep., Hubei Prov., Wuhan, Donghu L
Fresh water |
| Abstract |
The responses of decomposition to nitrogen (N) and phosphorus (P) supply were investigated in three leaf species: Eichhornia crassipes, Vallisneria natans, and Potamogeton maackianus. Decomposition was fastest in E. crassipes (0.047-0.099 day−1, intermediate in V. natans (about 0.030 day−1), and slowest in P. maackianus (about 0.010 day−1). Increase in P-availability increased the decomposition rate of E. crassipes by 68-87%, whereas the impact of N-availability alone was insignificant. Both N- and P-availability in waters had no significant impact on the decomposition rates of V. natansand P. maackianus (P > 0.05). The effects of P-availability on the N and P content levels of the three species were significant (P < 0.01), except for the impact on N content of V. natans (P = 0.526). In contrast, environment N-availability was insignificant. These results indicate that the responses of decomposition to nutrient availability depend on plant species and nutrient type. P-availability has stronger effects on litter nutrient dynamics than N-availability. |
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