Relationship between dominant species, vegetation composition and species attributes in spring and autumn on a riverbank: implications for river management to enhance ecosystem functions
Relationship between dominant species, vegetation composition and species attributes in spring and autumn on a riverbank: implications for river management to enhance ecosystem functions
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DOI：
10.1007/s11355-023-00551-z
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发表时间：
2023-02-23
影响因子：
2
通讯作者：
Mitchley，Jonathan
中科院分区：
文献类型：
--
作者：
Yamada，Susumu;Saito，Hiromichi;Mitchley，Jonathan
河岸植被的一项重要生态功能是控制水土流失。河岸也为草原物种提供了潜在的半自然栖息地。日本以前的河岸植被分类忽略了优势物种和物种组成的季节变化，没有提供关于生态系统功能的信息。本文旨在阐明春秋两季优势种、植被组成和物种属性之间的关系。我们调查了日本河岸上125块土地上的植被。根据秋季优势种的不同，确定了7种植被类型，分别是白茅型(I型)和石竹型(P型)。其他5种植被类型优势种随季节变化，但春季优势种以多花黑麦草为主。由于一年生植物的优势与根系快速周转和土壤侵蚀控制不佳有关，因此P和I类型在控制土壤侵蚀方面更具优势。物种总数和草地物种数均较少，各植被类型均表现为种贫草地。不同物种属性之间的物种数量没有明显差异。然而，这一分类与物种组成的差异有关，反映了每种植被类型中的几个代表性物种。P型具有更多的乡土代表种和典型草原种。由于一些代表性物种可能适合自然过程(例如，授粉)，这种分类反映了生物多样性的功能。
An important ecosystem function of vegetation on riverbanks is the control of soil erosion. Riverbanks also offer potential semi-natural habitats for grassland species. Previous classification of riverbank vegetation in Japan ignored both seasonal changes of dominant species and species composition, offering no information on ecosystem functions. Here we aimed at clarifying the association between dominant species, vegetation composition and species attributes in spring and autumn. We surveyed vegetation in 125 plots on a riverbank in Japan. We identified seven vegetation types on the basis of dominant species in autumn.Imperata cylindricavar.koenigii(Type I) andPleioblastus chino(Type P) dominated their vegetation year-round. Dominant species changed seasonally in the other five vegetation types, butLolium multiflorumwas dominant in spring. Since the dominance of annuals is linked to fast turnover of root systems and thus poor control of soil erosion, Types P and I are superior in controlling soil erosion. Both the total number of species and the number of grassland species were small, showing species-poor grasslands in all vegetation types. There were no clear differences in numbers of species between species attributes. Nevertheless, this classification was linked to differences in species composition, reflecting several representative species in each vegetation type. Type P has more indigenous representative species and typical grassland species. Since some representative species may be suitable for natural processes (e.g., for pollination), this classification reflects biodiversity functions.