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[1]谭勇,何东进,游巍斌,等.闽东滨海湿地入侵种互花米草表型可塑性及生物量分配对潮位梯度的响应[J].应用与环境生物学报,2014,20(05):863-868.[doi:10.3724/SP.J.1145.2014.03038]
 TAN Yong,HE Dongjin,YOU Weibin,et al.Spartina alterniflora morphological plasticity and biomass allocation in response to tidal gradient change in Mindong coastal wetlands[J].Chinese Journal of Applied & Environmental Biology,2014,20(05):863-868.[doi:10.3724/SP.J.1145.2014.03038]
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闽东滨海湿地入侵种互花米草表型可塑性及生物量分配对潮位梯度的响应()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
20卷
期数:
2014年05期
页码:
863-868
栏目:
研究论文
出版日期:
2014-10-25

文章信息/Info

Title:
Spartina alterniflora morphological plasticity and biomass allocation in response to tidal gradient change in Mindong coastal wetlands
作者:
谭勇 何东进 游巍斌 王韧 蔡金标 王鹏 赵莉莉 严锦钰 肖石红
1福建农林大学林学院 福州 350002
2福鼎市林业局 福鼎 355200
3霞浦县林业局 霞浦 355100
4宁德市林业局 宁德 352100
Author(s):
TAN Yong HE Dongjin YOU Weibin WANG Ren CAI Jinbiao WANG Peng ZHAO Lili YAN Jingyu XIAO Shihong
1Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2Forestry Bureau of Fuding, Fuding 355200, China
3Forestry Bureau of Xiapu, Xiapu 355100, China
4 Forestry Bureau of Ningde, Ningde 352100, China
关键词:
 互花米草潮位梯度可塑性生态响应策略闽东滨海湿地
Keywords:
Spartina alterniflora tide level gradient morphological plasticity ecological strategy Mindong coastal wetlands
分类号:
Q948.11 : S451
DOI:
10.3724/SP.J.1145.2014.03038
文献标志码:
A
摘要:
外来植物入侵对生物多样性和生态系统稳定性具有严重威胁,为阐明互花米草(Spartina alterniflora)在闽东滨海湿地入侵机理,分析影响互花米草表型可塑性的因素与其成功入侵之间的关系,选择闽东滨海湿地潮间带6条断面,研究不同潮位生境互花米草种群形态特征、无性繁殖特征、有性繁殖特征以及生物量积累和分配格局. 结果表明,潮位梯度对互花米草形态特征和有性繁殖特征有显著性影响(P < 0. 05),对互花米草无性繁殖影响不显著(P > 0. 05);株高、茎粗、叶长等形态指标在高潮位(S6)处均显著大于其他潮位生境,但中潮位和低潮位整体上无显著差异;潮位变化对互花米草种群密度影响不显著,互花米草种群入侵速度放缓,说明尽管互花米草有性繁殖可塑性很强,但繁殖效率低下;而无性繁殖表型可塑能力差可能就是解释互花米草种群10年来在闽东滨海湿地入侵缓慢甚至趋于稳定的原因之一;潮位梯度对互花米草生物量积累有极显著影响(P<0.01),样地S6地上生物量和地下生物量均显著高于其他样地,对互花米草生物量分配有一定影响,但没达到显著性水平. 总之,互花米草更适应高潮位生境,生境“觅养”能力与有性繁殖能力更强.
Abstract:
Spartina alterniflora is a world-wide notorious invasive species that has colonized large areas in coastal China since it was introduced in 1979. Its powerful genetic differentiation ability and resistance to adversity contribute to its invasiveness. For a comprehensive understanding of the mechanism of plant invasion, the ecological strategy of exotic plants as a result of resources and environmental difference is needed to be known. This paper aimed to study Spartina alterniflora morphological plasticity and biomass allocation in response to tidal gradient change in Mindong coastal wetlands, China. Spartina alterniflora morphological variation, asexual reproduction, sexual propagation and biomass distribution characters at six transects of the intertidal zone in Mindong coastal wetlands were investigated by field investigation and laboratory analysis. The results showed that tide level gradient had significant effects on morphological variation and sexual propagation of Spartina alterniflora (P < 0.05),but had no significant effect on asexual reproduction (P > 0.05). The morphological indices of Spartina alterniflora including plant height, stem diameter, length of leaf were significantly higher at high tide level (S6) than the middle and low tide level, with the differences between the middle and low tide levels not significant. The tide level gradient had no significant effect on population density of Spartina alterniflora (P > 0.05). The intrusion of Spartina alterniflora slowdown in the past 10 years indicated that its sexual reproductive efficiency was very low in spite of the strong plasticity of sexual reproduction. One reason of the slowdown in intrusion of Spartina alterniflora was probably the poor phenotypic plasticity in asexual reproduction of Spartina alterniflora. Tide gradient had significant effects on biomass accumulation of Spartina alterniflora (P < 0. 01), with the aboveground biomass and belowground biomass of S6 significantly higher than other plots. Tide gradient had effects on biomass distribution, though not statistically significant. These results indicated that Spartina alterniflora adapts better to high tide habitats, because of its higher habitat “foraging” ability and sexual reproduction at high tide level.
Keywords Spartina alterniflora; tide level gradient; morphological plasticity; ecological strategy; Mindong coastal wetlands

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备注/Memo

备注/Memo:
 福建省科技厅重点项目(2009N0009)、国家自然科学基金项目(31370624,30870435)、国家教育部博士科学点基金项目(20103515110005)和福建省自然科学基金项目(2008J0116,2011J01071)资助 Supported by the Key Project of Science and Technology of Fujian (2009N0009), the National Natural Science Foundation of China (31370624, 30870435), the Ph. D. Program Foundation of Ministry of Education of China (20103515110005), and the Natural Science Foundation of Fujian (2008J0116 & 2011J01071)
更新日期/Last Update: 2014-10-30