摘要
互花米草根系发达,适应环境的能力强,在与其他植物争夺空间和养分的过程中容易占据优势。其作为外来入侵物种已对我国海岸带生态系统造成危害。为了探讨互花米草的入侵对我国红树林生长和扩张所造成的影响,本研究以广西山口红树林国家级自然保护区的红树林为例,通过对1995-2019年8景Landsat多光谱遥感影像的解译,分析互花米草和红树林面积的变化情况。结果表明:在没有人工干预的情况下,互花米草在与红树林抢夺生存空间的过程中占据优势;而在实施刈割、翻根等互花米草治理措施下,互花米草面积逐年减少,红树林面积的年均增长率则呈增长趋势。说明互花米草的入侵会扼制红树林的生长和扩张,而刈割、翻根等互花米草治理措施的开展能够有效削弱互花米草入侵对红树林生长和扩张的影响,进而达到保护红树林生态系统的效果。本研究结果为山口红树林国家级自然保护区互花米草的治理与红树林生态系统的保护提供了定量的科学数据,对更大范围互花米草的防治以及红树林生态系统进一步保护措施的制定具有重要的参考价值。
Given its high root regeneration ability and adaptation capacity,Spartina alterniflora would predominate the resource competition with other plant species.As an invasive alien species,it has caused serious damages to the coastal ecosystem of China.We explored the impacts of S.alterniflora invasion on the growth and expansion of mangroves around the coastal zones around Guangxi Shankou Mangrove National Nature Reserve(GSMNNR).The area of S.alterniflora and mangroves in the GSMNNR was analyzed based on a sequence of Landsat satellite multispectral images collected during 1995 to 2019.The results showed that S.alterniflora predominated in the competition with mangroves without human intervention.The area of S.alterniflora decreased under the conditions of cutting,rooting and other management measures,while the average annual growth rate of mangrove area correspondingly increased.It indicated that the invasion of S.alterniflora would inhibit the growth and expansion of mangroves.The S.alterniflora management measures,such as mowing and rooting,could weaken the negative impacts of S.alterniflora on mangroves.Mangroves could thus be effectively protected.This study could provide quantitative scientific data for S.alterniflora management and the protection of the mangrove ecosystem in the GSMNNR,and thus be a valuable reference to the prevention on a larger scale of S.alterniflora and the formulation of further protective measures for mangroves.
作者
沈鸿坤
赵博义
陈铭洋
黄荣永
余克服
梁文
SHEN Hong-kun;ZHAO Bo-yi;CHEN Ming-yang;HUANG Rong-yong;YU Ke-fu;LIANG Wen(Guangxi Laboratory on the Study of Coral Reefs in South China Sea/Coral Reef Research Centre of China/School of Marine Sciences,Guangxi University,Nanning 530004,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519000,Guangdong,China;Guangxi Mangrove Research Center,Beihai 536000,Guangxi,China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2022年第2期397-404,共8页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(42030502,42090041,41766007)
广西科技计划项目(AD17129063,AA17204074,AA18118038)
广西自然科学基金项目(2020GXNSFAA297245)资助。
关键词
互花米草
红树林
生态系统
生态竞争
遥感影像
Spartina alterniflora
mangrove
ecosystem
ecological competition
satellite image
