The variability of some population (demo) parameters of the gammarid amphipod Melita palmata was associated with contrasting habitat structures created by the non‐indigenous reef‐builder polychaete Ficopomatus enigmaticus in the Mar Chiquita coastal lagoon (37°40 S, 57°23 W, Argentina). Sampling of M. palmata was conducted biweekly during the reproductive period in F. enigmaticus reefs and sediment from reef‐free areas, accounting for the vertical distribution and the presence/absence of macroalgae. Males, females (non‐ovigerous and ovigerous), and juveniles are present in both reefs and sediment, but the abundance of M. palmata is several orders of magnitude higher in reefs. Reefs’ M. palmata population (demo) displays variations in: (a) abundance, (b) mean size, and (c) proportions of demographic categories. In reefs, females show a higher proportion of ovigerous specimens and a female‐biased sex ratio, contrasting the 1:1 ratio observed in sediment. Individuals are more abundant in the surface layer covered with macroalgae in reefs (small sizes) and macroalgae or valves in sediment. The association of M. palmata to F. enigmaticus reefs drives its permanency in the system, enhancing its reproductive potential via different reproductive traits and habitat use, with a reduced potential to spread to marginal areas.

中文翻译：

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尼科河生态系统工程栖息地结构对两栖类两栖动物种群参数的影响：一项NIS-NIS相互作用研究

的gammarid的一些人口（演示）参数的变异性片脚梅利塔掌叶用对比由非土著礁助洗剂多毛类创建生境结构相关联Ficopomatus enigmaticus在三月奇基塔沿海泻湖（37℃40 S，57°23 W，阿根廷）。在繁殖期，莫尼卡莫内斯礁和无礁地区的沉积物每两周进行一次棕榈毛取样，这是由于垂直分布以及是否存在大型藻类所致。男性，女性（非产卵和产卵），和青少年存在于两个暗礁和泥沙，但丰M.掌叶是几个数量级在礁高。珊瑚礁的M. palmata人口（演示）显示以下变化：（a）丰富度；（b）平均规模；以及（c）人口类别的比例。在珊瑚礁中，雌性的卵生标本比例更高，雌性偏向性别比，而沉积物中的比例为1：1。在礁石（小尺寸）中大型藻类和沉积物中大型藻类或瓣膜覆盖的表层中，个体更为丰富。的关联M.掌叶到F. enigmaticus珊瑚礁驱动系统的持久性，通过不同的繁殖性状和栖息地利用提高其繁殖潜力，以减少的潜在蔓延到边缘地区。