An invasive seagrass drives its own success in two invaded seas by both negatively affecting native seagrasses and benefiting from those costs
An invasive seagrass drives its own success in two invaded seas by both negatively affecting native seagrasses and benefiting from those costs
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DOI：
10.1111/oik.09403
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发表时间：
2022-11
期刊：
影响因子：
3.4
通讯作者：
Kelcie L. Chiquillo;P. Barber;M. Vasquez;E. Cruz‐Rivera;D. Willette;G. Winters;P. Fong
中科院分区：
文献类型：
--
作者：
Kelcie L. Chiquillo;P. Barber;M. Vasquez;E. Cruz‐Rivera;D. Willette;G. Winters;P. Fong
本地物种和入侵物种之间相互作用的性质和强度可以决定入侵的成功。物种之间的相互作用可以驱动、阻止或促进入侵，因此了解这些相互作用的性质和结果至关重要。我们进行了mesocosm实验，以测试的结果之间的相互作用halophila stipulacea，海草入侵地中海和加勒比海，和本地海草（Cymopera nodosaandSyringelephiliforme，分别）阐明机制解释成功的入侵。中间生态系统包含完整的核心，物种混合或单独生长。总体而言，在这两个地点，有一个模式的入侵增长速度与本地比单独时，同时也产生负面影响的本地，与类似的模式，拍摄密度，地上和地下生物量。在加勒比海，H。当与原生植物一起生长时，托叶在6周内增加了5.6 ± 1.0个SE芽，而当单独生长时，净损失了-0.8 ± 1.6个SE芽。相反的模式发生为S。丝状，虽然这些差异并不显著。虽然在地中海的模式是相同的加勒比地区，与本地增加的枝条比单独生长时，入侵生长，这些差异的枝条并不显着。然而，当以地上生物量来衡量时，H.托叶对原生种C.结节。我们的研究结果表明，一个海草入侵两个海洋可能会推动自己的成功，既负面影响本地海草，并受益于这种负面的相互作用。这是一个新的例子，一个本地的海草物种促进成功的入侵在自己的成本，提供了一个可能的机制，这种入侵物种的广泛成功。
The nature and strength of interactions between native and invasive species can determine invasion success. Species interactions can drive, prevent or facilitate invasion, making understanding the nature and outcome of these interactions critical. We conducted mesocosm experiments to test the outcome of interactions betweenHalophila stipulacea, a seagrass that invaded the Mediterranean and Caribbean Seas, and native seagrasses (Cymodocea nodosaandSyringodium filiforme, respectively) to elucidate mechanisms explaining the successful invasions. Mesocosms contained intact cores with species grown either mixed or alone. Overall, in both locations, there was a pattern of the invasive growing faster with the native than when alone, while also negatively affecting the native, with similar patterns for shoot density, aboveground and belowground biomass. In the Caribbean,H. stipulaceaincreased by 5.6 ± 1.0 SE shoots in 6 weeks when grown with the native while, when alone, there was a net loss of −0.8 ± 1.6 SE shoots. The opposite pattern occurred forS. filiforme, although these differences were not significant. While the pattern in the Mediterranean was the same as the Caribbean, with the invasive grown with the native increasing shoots more than when it grew alone, these differences for shoots were not significant. However, when measured as aboveground biomass,H. stipulaceahad negative effects on the nativeC. nodosa. Our results suggest that a seagrass that invaded two seas may drive its own success by both negatively affecting native seagrasses and benefiting from that negative interaction. This is a novel example of a native seagrass species facilitating the success of an invasive at its own cost, providing one possible mechanism for the widespread success of this invasive species.