Effects of N deposition on plant species richness and community structure in a temperate grassland
Humans are adding nitrogen (N) worldwide.It remains unclear, however, whether plant diversity and community structure will be equally impacted by inputs of reactive N coming from either small and frequent N deposition events or large and infrequent N fertilization events.By independently manipulating the rate and frequency of N(NH4NO3) input, with nine-rate (from 0 to 50 g N m-2 yr-1) crossed with two frequencies (twice or monthly yr-1) in a temperate steppe of northern China across 2008-2013, this study tried to tease apart these potentially contrasting effects.Our results showed that, 1), plant species richness decreased more quickly at high rates and at low frequency of N addition.2), community structure also changed more quickly at low frequency of N addition.Our results suggest that previous fertilization studies have likely over-estimated the effects of N deposition on plant species loss and community structure change.
N addition frequency biodiversity productivity
Yunhai Zhang Xingguo Han
State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of
国际会议
The 5th China-Japan-Korea Grassland Conference(第五届中-日-韩国际草地会议)
长春
英文
77-78
2014-08-20（万方平台首次上网日期，不代表论文的发表时间）