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Mudflat species: Threatened or hidden? An extensive seed bank survey of 108 fish ponds in Southern Germany
Biological Conservation ( IF 5.9 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.biocon.2018.06.024
Peter Poschlod , Sergey Rosbakh

Abstract Mudflats are the most endangered habitats in Central Europe. In Germany, 60% of mudflat plant species are listed as endangered on the national Red List. The main causes are human activities such as the straightening and construction of barrages along large rivers and the abandoning or changing management of fish ponds. Species from ephemeral habitats, such as mudflats, typically have a persistent soil seed bank. However, it has not yet been examined whether mudflat species are still present but hidden in the sediment seed bank. To answer this question, we studied the seed bank of 108 ponds in Southern Germany. More than 300,000 seeds from mudflat species germinated from the sediment samples. Species listed on the national or regional Red Lists were found in all but three ponds, with all ponds containing up to 11 species. Some Red List species were present at very high density (up to nearly 3000 seeds/l). Although the pond locations in this study had been intensively floristically monitored for over half a century some species with >20 records were determined to be new in two study locations. Based on the last drainage date or record we conclude that seeds of mudflat species may survive between 50 years or even a century. It is, therefore, important that this hidden diversity should be considered in future conservation management practices. Furthermore, Red Lists should revise their entries on species with extremely long-term persistent seed banks by stating that they may be not extinct but hidden.

中文翻译:

泥滩物种:受到威胁还是隐藏?对德国南部 108 个鱼塘的广泛种子库调查

摘要 泥滩是中欧最濒危的栖息地。在德国,60% 的泥滩植物物种被列入国家红色名录中的濒危物种。主要原因是人类活动,如大江大河修筑拦河坝、废弃或改变鱼塘管理等。来自短暂栖息地(例如泥滩)的物种通常具有持久的土壤种子库。然而,尚未研究泥滩物种是否仍然存在但隐藏在沉积物种子库中。为了回答这个问题,我们研究了德国南部 108 个池塘的种子库。超过 300,000 颗来自泥滩物种的种子从沉积物样本中萌发。除了三个池塘外,所有池塘都发现了列入国家或地区红色名录的物种,所有池塘都含有多达 11 个物种。一些红色名录物种的密度非常高(高达近 3000 粒种子/升)。尽管本研究中的池塘位置已经进行了半个多世纪的密集区系监测,但在两个研究位置,一些记录超过 20 的物种被确定为新物种。根据上次排水日期或记录,我们得出结论,泥滩物种的种子可能存活 50 年甚至一个世纪。因此,在未来的保护管理实践中应考虑到这种隐藏的多样性,这一点很重要。此外,红色名录应该修改它们关于具有极长持久性种子库的物种的条目,声明它们可能没有灭绝而是隐藏。尽管本研究中的池塘位置已经进行了半个多世纪的密集区系监测,但在两个研究位置,一些记录超过 20 的物种被确定为新物种。根据上次排水日期或记录,我们得出结论,泥滩物种的种子可能存活 50 年甚至一个世纪。因此,在未来的保护管理实践中应考虑到这种隐藏的多样性,这一点很重要。此外,红色名录应该修改它们关于具有极长持久性种子库的物种的条目,声明它们可能没有灭绝而是隐藏。尽管本研究中的池塘位置已经进行了半个多世纪的密集区系监测,但在两个研究位置,一些记录超过 20 的物种被确定为新物种。根据上次排水日期或记录,我们得出结论,泥滩物种的种子可能存活 50 年甚至一个世纪。因此,在未来的保护管理实践中应考虑到这种隐藏的多样性,这一点很重要。此外,红色名录应该修改它们关于具有极长持久性种子库的物种的条目,声明它们可能没有灭绝而是隐藏。重要的是,在未来的保护管理实践中应考虑到这种隐藏的多样性。此外,红色名录应该修改它们关于具有极长持久性种子库的物种的条目,声明它们可能没有灭绝而是隐藏。重要的是,在未来的保护管理实践中应考虑到这种隐藏的多样性。此外,红色名录应该修改它们关于具有极长持久性种子库的物种的条目,声明它们可能没有灭绝而是隐藏。
更新日期:2018-09-01
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