Multi-elemental stoichiometric ratios of atmospheric wet deposition in Chinese terrestrial ecosystems.
Environ Res
; 245: 117987, 2024 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-38141918
ABSTRACT
Intense human activities have significantly altered the concentrations of atmospheric components that enter ecosystems through wet and dry deposition, thereby affecting elemental cycles. However, atmospheric wet deposition multi-elemental stoichiometric ratios are poorly understood, hindering systematic exploration of atmospheric deposition effects on ecosystems. Monthly precipitation concentrations of six elements-nitrogen (N), phosphorus (P), sulfur (S), potassium (K), calcium (Ca), and magnesium (Mg)-were measured from 2013 to 2021 by the China Wet Deposition Observation Network (ChinaWD). The multi-elemental stoichiometric ratio of atmospheric wet deposition in Chinese terrestrial ecosystems was N K Ca Mg S P = 31 11 67 5.5 28 1, and there were differences between vegetation zones. Wet deposition N S and N Ca ratios exhibited initially increasing then decreasing inter-annual trends, whereas N P ratios did not exhibit significant trends, with strong interannual variability. Wet deposition of multi-elements was significantly spatially negatively correlated with soil nutrient elements content (except for N), which indicates that wet deposition could facilitate soil nutrient replenishment, especially for nutrient-poor areas. Wet N deposition and N P ratios were spatially negatively correlated with ecosystem and soil P densities. Meanwhile, wet deposition N P ratios were all higher than those of ecosystem components (vegetation, soil, litter, and microorganisms) in different vegetation zones. High input of N deposition may reinforce P limitations in part of the ecosystem. The findings of this study establish a foundation for designing multi-elemental control experiments and exploring the ecological effects of atmospheric deposition.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ecossistema
/
Nitrogênio
Limite:
Humans
País/Região como assunto:
Asia
Idioma:
En
Revista:
Environ Res
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
China