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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Invasive mangrove removal and recovery: Food web effects across a chronosequence
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Invasive mangrove removal and recovery: Food web effects across a chronosequence

机译：入侵性红树林的去除和恢复：按时序排列的食物网效应

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Red mangrove (Rhizophora mangle) was introduced to Hawai'i in 1902 and has since overgrown many coastal areas in Hawai'i, transforming nearshore sandy habitat into heavily vegetated areas with low water velocity, high sedimentation rates, and anoxic sediments. Introduced mangrove forests provide habitat for exotic species, including burrowing predators, which can exert top-down effects on benthic communities. Removal of mangrove overstory is a popular management technique, and, here, we study community change over a chronosequence of mangrove removals from 2007 to 2011, investigating infaunal community structure, crab abundance, and response to predator exclusion in the presence of mangrove overstory and along the chronosequence of removals. Overstory removal results in gradual changes in community composition concurrent with slow decomposition of sedimentary mangrove biomass (k = 0.36 ± 0.06 × 10~(-3) d~(-1)). Changes over time after removal include an increase in total infaunal abundance, a decrease in sub-surface deposit feeders, and an increase in suspension-feeding worms. Burrowing crab densities are uniform across mangrove and removal sites, and, unlike in native mangroves, their effects on infaunal communities are similarly negligible in both mangrove and removal areas. These results show that recovery from invasion and removal occurs gradually and is not governed by top-down effects.
机译：红树林（Rhizophora mangle）于1902年被引入夏威夷，此后在夏威夷的许多沿海地区都已泛滥成灾，将近岸的沙质生境转变为水速低，沉积速率高和缺氧沉积物的茂密植被区。引入的红树林提供了外来物种的栖息地，其中包括穴居掠食者，它们可以对底栖生物产生自上而下的影响。去除红树林的过度生长是一种流行的管理技术，在这里，我们研究了从2007年到2011年红树林去除的时间序列的群落变化，调查了在红树林存在过度变化的情况下，主要的群落结构，蟹的数量以及对捕食者排斥的反应。清除的时间顺序。覆土清除会导致群落组成逐渐变化，同时使沉积红树林生物量缓慢分解（k = 0.36±0.06×10〜（-3）d〜（-1））。去除后随时间的变化包括总臭虫总数的增加，地下沉积物饲养者的减少以及悬浮饲料蠕虫的增加。在红树林和清除地中，穴居蟹的密度是一致的，并且与本地红树林不同，在红树林和清除地中，它们对无脊椎动物群落的影响同样可以忽略。这些结果表明，从入侵和清除中恢复的过程是逐渐发生的，不受自上而下的影响。

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