The capacity of feathermosses to release mineral N to water and eventually re-capture it back from the solution was periodically measured in several 64-hour tests. Mosses were collected from 13 locations in western Alberta, Canada, and given several pre-treatments in the days leading up to the submersion of mosses in aerated distilled water. In a factorial experiment, the pre-extraction conditions were fertilized or left as controls and kept moist or allowed to dehydrate. The concentration of mineral N in the solution was monitored by withdrawing small samples of the solution for colorimetric analysis at pre-determined time intervals. To assess the effects of microflora and handling damage to the moss tissues on the rate of N exchange between moss and solutions, the test was repeated firstly using a solution of antibiotics instead of water and secondly using mosses that were not given time to recover from handling. No perceptible leakage of N was recorded from fully hydrated moss tissues. Dehydrated mosses lost as much as 8% of their total N content to the solution within two hours after re-hydration, but had recovered two thirds of it within the next 16 hours. Moss tested immediately after normal handling released 0.7% of their total N and recovered it at the same rate as the desiccation-damaged mosses. Application of antibiotics affected neither leakage nor re-absorption rate. During the gradual drying of moss, N apparently shifted from NO3− to NH4 . The strong ability of mosses to quickly re-absorb released N from surrounding solutions suggests that leakage of N from dried moss after rewetting, as a source of N to the ecosystem, is not as large as suggested by previous literature.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 109 • No. 4