Dating saltmarshes is a fundamental step to conserve them suitably, because the oldest saltmarshes are becoming increasingly rare and host a particular biodiversity. In a French Atlantic saltmarsh, we counted tree rings on Suaeda vera, a ligneous plant of the European saltmarshes. We considered that the age of the stem may give the minimal age of the saltmarsh on which it grows as this is a specialist species of this habitat. By combining the dating of the saltmarsh using this proxy with a classical dating based on a photo-interpretation method, we found that the count of tree rings on S. vera gives an accurate dating of the minimal age of a saltmarsh patch. However, because of the rather low longevity of this species (maximum of 27 years in the investigated area), old maps and aerial photographs still remain essential to date the oldest saltmarsh patches. We further discuss: (1) the potential use of cross-dating on dead stems of the plant to reconstruct the long-history of saltmarshes; (2) the potential link between the growth velocity of S. vera and the spatial dynamics of saltmarshes.

约会盐沼是适当保存它们的基本步骤，因为最古老的盐沼变得越来越稀有并具有特定的生物多样性。在法国大西洋盐沼中，我们数了欧洲盐沼的木质植物Suaeda vera上的年轮。我们认为茎的年龄可能是其生长的盐沼的最小年龄，因为这是该生境的特有物种。通过将使用此代理的盐沼的测年与基于照片解释方法的经典测年相结合，我们发现S. vera上的年轮数给出盐沼斑块最小年龄的准确日期。但是，由于该物种的寿命很短（在调查的区域中最长为27年），对于至今最古老的盐沼斑块而言，旧的地图和航拍照片仍然是必不可少的。我们进一步讨论：（1）在植物的死茎上交叉约会的潜在用途，以重建盐沼的悠久历史；（2）维拉链球菌生长速度与盐沼空间动态之间的潜在联系。