High probability of nitrogen and phosphorus co-limitation occurring in eutrophic lakes.
Environ Pollut
; 292(Pt A): 118276, 2022 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-34606973
ABSTRACT
Limnologists and governments have long had an interest in whether nitrogen (N) and/or phosphorous (P) limit algal productivity in lakes. However, the types and importance of anthropogenic and biogeochemical processes of N and P differ with lake trophic status. Here, a global lake dataset (annual average data from 831 lakes) demonstrates that total nitrogen (TN) total phosphorous (TP) ratios declined significantly as lakes become more eutrophic. From oligotrophic to hypereutrophic lakes, the probability of N and P co-limitation significantly increases from 15.0 to 67.0%, while P-only limitation decreases from 77.0 to 22.3%. Furthermore, TNTP ratios are mainly affected by concentrations of TP (r = -0.699) rather than TN (r = -0.147). These results reveal that lake eutrophication mainly occurs with increasing P rather than N, which shifts lake ecosystems from stoichiometric P limitation toward a higher probability of N and P co-limitation. This study suggests that low NP stoichiometry and a high probability of N and P co-limitation tend to occur in eutrophic systems.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fósforo
/
Lagos
Idioma:
En
Revista:
Environ Pollut
Ano de publicação:
2022
Tipo de documento:
Article