关键词: 内生真菌, 滨海湿地, 芦苇, 盐度胁迫

Abstract: Northeast China is an important base for food and cash crop production. As one of the sensitive areas to climate change, Northeast China is susceptible to abnormal rainfall, drought and other extreme events under the background of climate change. In order to study the division of precipitation change and its regional characteristics in Northeast China, the monthly precipitation data during 1961-2014 from 87 meteorological stations were used to calculate the percentage of precipitation anomalies, the division of precipitation change was made by using rotated empirical orthogonal function analysis (REOF) method, and the variation trends of precipitation in the whole area and each division region during 1961-2014 were analyzed by using linear trend analysis and 5year moving average analysis method. The results showed that Northeast China could be divided into 4 regions including southeast, central west, north and southwest regions. The annual precipitation anomalies in Northeast China had a slight decline trend, and the climatic trend rate was -4.817 mm·10 a^-1. Each region exhibited a similar decline trend with the whole area. The most obvious decline occurred in southwest region, while the least decline was in north region, with the climatic trend rates of -7.699 and -0.798 mm·10 a^-1, respectively.

Key words: salt stress., coastal wetland, endophytic fungi, Phragmites australis