We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
EFFECTS OF DEGRADATION ON PHOSPHORUS CYCLING IN ALPINE WETLAND OF TIBETAN PLATEAU.
- Authors
LIU, H. Y.; ZENG, X. Y.
- Abstract
Phosphorus (P) cycle plays a vital role in maintaining the structure and function of wetland ecosystems. However, research knowledge on high-altitude wetland ecosystems is very poor. In the present study, plant communities, soil P fractions and other properties and their transformation were investigated under the influence of four types of degradation categories, namely non-, light-, medium-, and severe degraded (ND, LD, MD, and SD, respectively) wetlands of Tibetan Plateau. The degradation of wetlands causes succession in the plant communities from wet to dry mesophytic communities, significantly reducing plant coverage and biomasses. As a result, soil water content (SWC), soil organic carbon (SOC), and soil total nitrogen (TN) contents decrease with increasing degradation. Plant P accumulation usually showed a decreasing trend with increasing levels of degradation. Soil total P, available P, inorganic P, Labile inorganic P, P mineralization rate, and alkaline phosphatase (ALP) concentration increased from non-degradation to light degradation and then declined until severe degradation. The redundancy analysis (RDA) ranking further revealed that labile organic P is the main source of soil available P and soil ALP play important role in P transformation. These results suggest that there prevails a nonlinear change on soil P pool and turnover rate to wetland degradation degree. The study thus provides a mechanistic understanding of alpine wetland degradation driven soil P dynamics and cycling, which would facilitate the restoration of nutrient-based degraded wetlands.
- Subjects
SOIL moisture; PLANT succession; SOIL degradation; SOIL dynamics; PLANT communities; PLATEAUS
- Publication
Applied Ecology & Environmental Research, 2024, Vol 22, Issue 4, p3403
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/2204_34033414