Data · dataset · 2026
Siqi Yang: Effect of Season and Health Status on Nutrient Dynamics in Diseased Agathis Australis Forests
Listed in ZivaHub
<table><tr><td><p dir="ltr">Kauri (Agathis australis), an endemic conifer, is threatened by kauri dieback caused by Phytophthora agathidicida.
Description
We assessed how health status and season influence plant-available nutrient supply in six plots (24 subplots) spanning symptomatic and asymptomatic stands across three Waitākere Ranges sites. PRS probes measured nitrogen, phosphorus, base cations, micronutrients, and trace metals quarterly from March 2024 to February 2025.
Health status affected Cu and Pb availability, with lower availability in symptomatic plots, possibly reflecting reduced rhizosphere activity and organic matter cycling. Season influenced most nutrients: supply was lowest in the austral summer, likely because dry soils limited diffusion while plant demand increased. NH4+ increased in winter, consistent with reduced uptake and suppressed nitrification under cool, wet conditions, whereas NO3- remained low and showed no health or seasonal response.
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Seasonal controls, therefore, dominated nutrient availability, while disease symptoms were associated with targeted elemental shifts. Repeated in-situ measurements clarify nutrient dynamics in disease-affected forests.</p></td></tr></table><p></p>
Links
Where it is published
- DOI doi.org/10.17608/k6.auckland.34027398.v2 ↗
DOI / persistent id · from zivahub uct ac za
Catalogue records · 1
- OAI-PMH record api.figshare.com/v2/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Af… ↗
metadata API · from zivahub uct ac za
Topics
- From keywords
- Earth & Environmental Science
- Inferred from text
- Disease 75% · Ecological applications 70% · Tabular 65%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| ZivaHub | oai:figshare.com:article/34027398 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[disease].local:disease:disease | enrichment · zivahub uct ac za | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[field].anzsrc:group:4102 | enrichment · zivahub uct ac za | taxonomy-embedding@1.1.0 | title+keywords+description (70%) |
| concepts[field].local:field:earth-environmental | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[modality].local:modality:tabular | enrichment · zivahub uct ac za | keyword-concept-rules@1.0.0 | title+description (65%) |
| description | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/description |
| license | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/rights |
| publication_date | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| title | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/title |