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首页> 外文期刊>Marine ecology >The rise of Laminaria ochroleuca in the Western English Channel (UK) and comparisons with its competitor and assemblage dominant Laminaria hyperborea
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The rise of Laminaria ochroleuca in the Western English Channel (UK) and comparisons with its competitor and assemblage dominant Laminaria hyperborea

机译：海带海带在英国西部海峡（英国）的兴起及其与竞争者和群体优势海带的比较

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摘要

The distribution of species is shifting in response to recent climate change. Changes in the abundance and distributions of habitat-forming species can have knock-on effects on community structure, biodiversity patterns and ecological processes. We empirically examined temporal changes in the abundance of the warm-water kelp Laminaria ochroleuca at its poleward range edge in the Western English Channel. Resurveys of historical sites indicated that the abundance of L. ochroleuca has increased significantly in recent decades. Moreover, examination of historical records suggested that L. ochroleuca has extended its distribution from sheltered coasts on to moderately wave-exposed open coasts, where it now co-exists and competes with the assemblage dominant Laminaria hyperborea. Proliferation of L. ochroleuca at its poleward range edge corresponds with a period of rapid warming in the Western English Channel. Preliminary comparisons between L. ochroleuca and L. hyperborea highlighted some subtle but ecologically significant differences in structure and function. In summer, the average biomass of epiphytic stipe assemblages on L. hyperborea was 86 times greater than on L. ochroleuca whereas, on average, L. ochroleuca had a greater stipe length and its blade supported 18 times as many gastropod grazers (Gibbula cineraria). Differences in summer growth rates were also recorded, with L. ochroleuca being more productive than L. hyperborea throughout July. Comprehensive seasonally replicated comparisons are needed to examine the wider implications of proliferation of L. ochroleuca at its poleward range edge, but our study suggests that local biodiversity patterns and ecological processes (e.g. timing of productivity and trophic pathways) on shallow subtidal reefs may be altered by shifts in the relative abundances of habitat-forming kelp species.
机译：物种的分布正在响应最近的气候变化而变化。形成栖息地物种的数量和分布的变化可能对社区结构，生物多样性模式和生态过程产生连锁反应。我们根据经验检查了温水海带海带Laminaria ochroleuca在西英吉利海峡极向范围边缘时的时空变化。历史遗迹的调查表明，近十年来，草的丰富度显着增加。此外，对历史记录的审查表明，草已将其分布从庇护海岸扩展到中等波浪暴露的开放海岸，在这里它与共存的优势海带共存并竞争。 L. ochroleuca在极地范围边缘的扩散与西方英吉利海峡的快速变暖时期相对应。草和高产乳杆菌的初步比较表明，在结构和功能上存在一些细微但具有生态意义的差异。夏季，高产的L. ochroleuca附生菌柄组合的平均生物量比86草L. ochroleuca的平均生物量高86倍，而草L. ochroleuca的叶片柄长平均更大，其叶片支撑的腹足纲小食草（Gibbula cineraria）为18倍。 。还记录了夏季增长率的差异，整个七月期间。草L. boboleuca的生产力要高于L. hyperborea。需要进行全面的季节性复制比较，以检查草L.ochroleuca在极地范围边缘的扩散所产生的更广泛的影响，但我们的研究表明，浅层潮汐暗礁上的局部生物多样性模式和生态过程（例如，生产力和营养路径的时间）可能会发生变化。通过改变形成栖息地的海带物种的相对丰度。

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  • 来源
    《Marine ecology》 |2015年第4期|1033-1044|共12页
  • 作者

    Smale Dan A.; Wernberg Thomas; Yunnie Anna L. E.; Vance Thomas;

  • 作者单位

    Marine Biol Assoc UK, Plymouth PL1 2PB, Devon, England|Univ Western Australia, UWA Oceans Inst, Crawley, WA, Australia|Univ Western Australia, Sch Plant Biol, Crawley, WA, Australia;

    Univ Western Australia, UWA Oceans Inst, Crawley, WA, Australia|Univ Western Australia, Sch Plant Biol, Crawley, WA, Australia;

    Marine Biol Assoc UK, Plymouth PL1 2PB, Devon, England;

    PML Applicat Ltd, Plymouth, Devon, England;

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  • 正文语种 eng
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  • 关键词

    Climate change; habitat-forming species; kelp forest; Laminariales; range expansion;

    机译：气候变化;形成栖息地的物种;海带森林;海带;范围扩大;

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