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Phosphorus stoichiometric homeostasis of submerged macrophytes and associations with interspecific interactions and community stability in Erhai Lake, China.
- Source :
-
Water Research . Jun2024, Vol. 256, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- • Submerged macrophytes exhibited phosphorus stoichiometric homeostasis (H P). • H P value dictated submerged macrophyte community stability. • Eutrophication altered interspecific interactions among submerged macrophytes. • Decline of high- H P species reduced community stability. According to stoichiometric homeostasis theory, eutrophication is expected to increase the dominance of submerged macrophytes with low homeostatic regulation coefficients (H) relative to those with high H values, ultimately reducing macrophyte community stability. However, empirical evidence supporting this hypothesis is limited. In this study, we conducted a three-year tracking survey (seven sampling events) at 81 locations across three regions of Erhai Lake. We assessed the H values of submerged macrophyte species, revealing significant H values for phosphorus (P) and strong associations of H P values (range: 1.58–2.94) with species and community stability. Moreover, in plots simultaneously containing the dominant high- H P species, Potamogeton maackianus , and its low- H P counterpart, Ceratophyllum demersum , we explored the relationships among eutrophication, interspecific interaction shifts, and community dynamics. As the environmental P concentration increased, the dominance of P. maackianus decreased, while that of C. demersum increased. This shift coincided with reductions in community H P and stability. Our study underpins the effectiveness of H values for forecasting interspecific interactions among submerged macrophytes, thereby clarifying how eutrophication contributes to the decline in stability of the submerged macrophyte community. [Display omitted] [ABSTRACT FROM AUTHOR]
- Subjects :
- *POTAMOGETON
*MACROPHYTES
*HOMEOSTASIS
*PHOSPHORUS
*LAKES
*SPECIES
*EUTROPHICATION
Subjects
Details
- Language :
- English
- ISSN :
- 00431354
- Volume :
- 256
- Database :
- Academic Search Index
- Journal :
- Water Research
- Publication Type :
- Academic Journal
- Accession number :
- 177109781
- Full Text :
- https://doi.org/10.1016/j.watres.2024.121575