芦苇
互花米草
垃圾箱
植物凋落物
营养物
生物
入侵物种
湿地
莎草
河口
农学
生态学
植物
沼泽
作者
Chun Wang,Weiqi Wang,Jordi Sardans,Linmei Ouyang,Chuan Tong,Dolores Asensio,Albert Gargallo‐Garriga,Martin Wiesmeier,Josep Peñuelas
标识
DOI:10.1016/j.scitotenv.2020.139124
摘要
Invasion of plants in wetland ecosystems is often associated with changes in litter decomposition and in nutrient use, uptake and cycling between invasive and native plants. We studied litter decomposition rates, N and P release and elemental composition and stoichiometry during the invasion of Phragmites australis and Spartina alterniflora into native Cyperus malaccensis wetlands in the Minjiang River estuary (China). Aboveground litter in mono-specific stands decomposed faster for Cyperus malaccensis than for Spartina alterniflora and for Phragmites australis. Cyperus malaccensis litter decomposed slower under the stands of both invasive species. In contrast, the litter of both invasive species decomposed faster under Cyperus malaccesis stands. We observed that the invasion of these species was associated with an increased rate of aboveground litter decomposition and large absolute amounts of C, N and P released from the litter when litter from invasive species was mixed with that of native species. Our results suggest that the large nutrient release from litter during early stages of the invasion favored invasive species with larger size and higher nutrient-uptake capacity than the native species.
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