School of Forestry and Wildlife Sciences, Auburn University, AL 36849, USA.
Mar Pollut Bull. 2012 Dec;64(12):2749-55. doi: 10.1016/j.marpolbul.2012.09.015. Epub 2012 Oct 27.
Oil exposure has been shown to be detrimental to several salt marsh plants however little information is available for Juncus roemerianus. Thirty-two mesocosms were established with J. roemerianus sod and replicate marshes were exposed to Louisiana sweet crude oil to test oil dose (6, 12, and 24 L m⁻²) and weathering (oil weathered for 0 days, 3 days, and 3 weeks). Juncus were monitored following oil exposure for culm survival, photosynthetic rates, and C-assimilation rates. Oil dosage had a significant effect among wetlands with low-dose (6 L m⁻²) mesocosms having higher culm survival, photosynthetic rates, and C-assimilation rates than medium or high dose wetlands (12 or 24 L m⁻²). Oil weathering did not elicit significant differences between treated wetlands however full strength wetlands (un-weathered oil) consistently had the lowest culm survivorship, photosynthetic rates, and C-assimilation rates. From our results, J. roemerianus marshes may be very susceptible to oil exposure.
油暴露已被证明对几种盐沼植物有害，然而，关于互花米草的信息却很少。建立了 32 个中尺度模型，并用互花米草草皮进行了复制，并将沼泽暴露于路易斯安那甜原油中，以测试油剂量（6、12 和 24 L m ⁻² ）和风化（油风化 0、3 和 3 周）。在油暴露后，监测互花米草的茎存活、光合速率和 C 同化速率。油剂量对湿地有显著影响，低剂量（6 L m ⁻² ）中尺度模型的茎存活、光合速率和 C 同化速率均高于中剂量或高剂量湿地（12 或 24 L m ⁻² ）。油风化并未在处理湿地之间引起显著差异，但全强度湿地（未风化的油）的茎存活、光合速率和 C 同化速率始终最低。根据我们的结果，互花米草沼泽可能非常容易受到油暴露的影响。
