Native plant community recovery afterCarpobrotus(ice plant) removal on an island - results of a 10-year project
Native plant community recovery afterCarpobrotus(ice plant) removal on an island - results of a 10-year project
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DOI：
10.1111/avsc.12524
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发表时间：
2020-09-27
影响因子：
2.8
通讯作者：
Affre, Laurence
中科院分区：
文献类型：
--
作者：
Buisson, Elise;Braschi, Julie;Affre, Laurence
Carpobrotus属的问题物种，或冰草，是多年生草本植物，多汁，形成垫子，经常被引入以稳定土壤。它们在沿海环境中很常见，因此可能威胁到岛屿的生物多样性。虽然它们对土壤、植物群落和相关动物的影响是众所周知的，但关于碳溴化物防治对植被恢复的影响的文献很少。本文的目的是描述碳溴化物去除后的植物群落轨迹。地理位置：巴高：一个58公顷的地中海岛屿，位于法国南部。方法2011-2012年间清除石炭及其凋落物。从那时起，对发芽和复芽进行了跟踪控制。在碳溴化物去除前两年和移除后七年，每年都对植物群落进行调查：在两个约0.5公顷的地点(一个沿海和一个内陆)和作为潜在参考的三个本地植物群落。检验了不同年份间树苗、植被参数和Bray-Curtis相似性指数的差异。通过非度量多维尺度和两个恢复指数对植物群落动态进行了研究。结果石棉及其凋落物的清除使当地植物群落的多样性得到恢复。为了防止Carpobrotus回归并确保成功，至少需要七年的后续控制，但工作量随着时间的推移而减少。在沿海恢复的植物群落很快就达到了与未入侵的海岸植被相似的组成和结构，尽管一些生长缓慢的本土物种(例如，海红花和补血草)仍然没有得到充分的代表。在内陆恢复的植物群落与周围的母质植被仍然有很大的不同，因为它的定居动态很慢，特别是在竞争草本植物存在的情况下。结论这两个地点现在提供的原生植物群落的组成和结构(植物高度、凋落物、裸露斑块)比过去与石炭相关的植物群落更多样化。
Question Species of the genusCarpobrotus, or ice plant, are succulent mat-forming perennial herbs often introduced for soil stabilization. They are common in coastal environments and may thus threaten island biodiversity. While their effects are well known on soils, plant communities and associated fauna, the effects ofCarpobrotuscontrol on vegetation recovery are poorly documented. The aim of the paper is to describe plant community trajectories afterCarpobrotusremoval. Location Bagaud: a 58-ha Mediterranean island, southern France. Methods Carpobrotusand its litter were removed in 2011-2012. Follow-up controls of germinations and resprouts were carried out from then on. Plant communities were surveyed every year two years before and seven years afterCarpobrotusremoval: on two ca. 0.5-ha sites (one coastal and one inland) and in three native plant communities used as potential references. Differences in resprouts, vegetation parameters, and Bray-Curtis similarity indices between years were tested. Plant community dynamics was studied through a non-metric multidimensional scaling and two recovery indices. Results The removal ofCarpobrotusand its litter led to the recovery of diverse native plant communities. To preventCarpobrotusreturn and ensure success, follow-up controls were necessary for a period of at least seven years, but the amount of work decreased with time. The plant community recovering on the coastal site quickly reached a composition and structure similar to that of non-invaded coastal vegetation, although some slow-growing native species remain underrepresented (e.g.,Crithmum maritimumandLimonium pseudominutum). The plant community recovering on the inland site was still very different from the surrounding matorral vegetation because of its slow colonization dynamics, particularly in the presence of competitive herbaceous species. Conclusion Both sites now provide diverse native plant communities with a more diversified composition and structure (plant heights, litter, bare ground patches) than the plant communities which used to be associated withCarpobrotusmats.