Foliar and soil N and δ15N as restoration metrics at Pūtaringamotu Riccarton Bush, Christchurch city
| Autor: | Travis W. Horton, Richard N. Holdaway, O. R. Cranney, David J. Hawke, Julie C. S. Brown, Sarah J. Bury |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Hydrology Biodiversity assessment Nutrient cycle Multidisciplinary Isoscapes 04 agricultural and veterinary sciences δ15N 010603 evolutionary biology 01 natural sciences Nutrient Disturbance (ecology) Urban forest Agronomy 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science |
| Zdroj: | Journal of the Royal Society of New Zealand. 47:319-335 |
| ISSN: | 1175-8899 0303-6758 |
| Popis: | Delta15N values and associated N concentrations may be useful nutrient cycling metrics for assessing restoration progress, and complement biodiversity assessment. We tested this hypothesis at Pūtaringamotu Riccarton Bush (‘Pūtaringamotu’), a low-rainfall urban forest fragment under restoration since 1974. Foliar and soil measurements came from four indigenous forests (Pūtaringamotu; Saltwater, high rainfall, logged until 2002; Ōkārito, high rainfall, never logged; Scotchman’s Creek, high rainfall, burrowing seabirds present). Despite different disturbance histories, Pūtaringamotu, Ōkārito and Saltwater results all fitted global δ15N regressions between rainfall and foliar N concentration. Enhanced foliar N concentrations accompanying low rainfall at Pūtaringamotu were similar to seabird-affected Scotchman’s Creek. Although Pūtaringamotu foliar δ15N values showed differences between taxa, they were less pronounced than for Ōkārito; Saltwater showed no effect. Further investigation of nutrient cycli... |
| Databáze: | OpenAIRE |
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