The cordgrass Spartina anglica C.E. Hubbard (Poaceae) is an invasive transformer in many salt marsh ecosystems worldwide. Relatively little is known about the capacity of Spartina to accelerate salt marsh succession and to protect salt marshes against sea level rise. We analyzed long-term changes in vegetation and elevation in mainland salt marshes of the European Wadden Sea in Schleswig-Holstein, Germany, to estimate the impact of non-native Spartina on the geomorphological resistance of salt marshes to sea level rise and on changes in species diversity. From 1989 to 2019, the Spartina-zone shifted and expanded upwards to elevations of the high marsh zone and Spartina increased in frequency in several salt marsh vegetation communities. At sites where Spartina dominated the vegetation already three decades ago, elevation and species diversity increased with a higher rate compared to sites lacking Spartina. The median change rates reached for elevation MHT +8.6 versus +1.5 mm per year, for species richness +3 versus \(\pm\)0 species per three decades, and for evenness +0.04 versus −0.08 per three decades, regarding plots with versus without former Spartina dominance, respectively. Invasion of salt marshes by Spartina and its continued, long-term presence were associated with increased elevation and species diversity in the face of sea level rise.

的大米草大米草CE哈伯德（禾本科）是许多盐侵入变压器沼泽全球生态系统。关于Spartina加速盐沼演替并保护盐沼免受海平面上升影响的能力知之甚少。我们分析了德国石勒苏益格-荷尔斯泰因州欧洲瓦登海大陆盐沼的植被和海拔高度的长期变化，以评估非天然斯巴达纳州对盐沼对海平面上升的地貌抵抗力及其对海平面变化的影响。物种多样性。从1989年到2019年，斯巴蒂娜（Spartina）-区发生了变化，并向上扩展到高沼泽地带和斯巴蒂娜（Spartina）一些盐沼植被群落的频率增加。在三十年前，斯巴蒂纳州已成为植被的主要发源地，海拔高度和物种多样性的增长速度与缺少斯巴蒂纳州的地区相比更高。对于高海拔地区而言，MHT的年变化率中位数为+8.6对+1.5 mm，物种丰富度为+3对\（\ pm \） 0种，每三个十年，平整度为+0.04对-0.08，每十年与之前没有Spartina统治的情况相对。面对海平面上升，Spartina入侵盐沼及其长期持续存在与海拔升高和物种多样性有关。