Rainfall near 700 mm marks turning point in ecosystem nitrogen retention
A study published in Nature Geoscience has identified a mean annual precipitation threshold of approximately 700 mm, beyond which the dominant controls on ecosystem nitrogen retention shift. The research team used naturally occurring soil nitrogen isotope as an integrated indicator of the long-term balance between nitrogen retention and loss in ecosystems. The findings provide insights into how precipitation regulates ecosystem nitrogen retention by altering the balance among plant, microbial, soil, and hydrological processes.
- ▪The study analyzed data from 31 sites across the National Ecological Observatory Network in the United States.
- ▪The researchers found that below the 700 mm threshold, soil δ15N decreases as MAP rises, reflecting stronger nitrogen retention.
- ▪The study suggests that changes in hydroclimatic boundaries could potentially reshape continental nitrogen cycling under climate extremes.
Phys.org files mainly under science. We currently carry 1,272 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
inspect →
Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Phys.org |
| Canonical URL | https://phys.org/news/2026-05-rainfall-mm-ecosystem-nitrogen-retention.html |
| Publication time | Sat, 30 May 2026 15:00:02 EDT |
| Retrieval time | 2026-05-30T19:04:43.955Z |
| Last seen | 2026-05-30T19:04:45.504Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | ObggD9WOP1MU |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
May 30, 2026 Rainfall near 700 mm marks turning point in ecosystem nitrogen retention by Liu Jia, Chinese Academy of Sciences edited by Stephanie Baum, reviewed by Andrew Zinin Stephanie Baum Scientific Editor Meet our editorial team Behind our editorial process Andrew Zinin Lead Editor Meet our editorial team Behind our editorial process Editors' notes This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: fact-checked peer-reviewed publication trusted source proofread The GIST Add as preferred source Soil δ15N serves as an integrative proxy of ecosystem N loss and retention. Credit: Nature Geoscience (2026).
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at Phys.org.