Relating bird host distribution and spatial heterogeneity in trematode infections in an intertidal snail-from small to large scale
Relating bird host distribution and spatial heterogeneity in trematode infections in an intertidal snail-from small to large scale
复制标题
DOI：
10.1007/s00227-005-0184-1
复制
发表时间：
2006-05-01
期刊：
影响因子：
2.4
通讯作者：
Poulin, R
中科院分区：
文献类型：
--
作者：
Fredensborg, BL;Mouritsen, KN;Poulin, R
在新西兰南岛奥塔哥港内的软沉积物潮间带海湾，新西兰泥螺，Zeacumantus subcarinatus，水鸟丰度和幼虫吸虫的空间分布进行了调查。在一项小规模的研究中，招聘吸虫笼哨兵蜗牛和感染的流行率在自由生活的蜗牛检查了网格的15个50 x25米的地块安排在一个有代表性的地区的潮间带海湾，在情节内滨鸟丰度（最终主机）和潮汐高度。在一项大规模的研究中，自然空间变异的幼虫吸虫在Z。subcarinatus在12个海湾进行了检查，与当地丰富的滨鸟。我们的研究结果显示，吸虫感染率的蜗牛是正相关的鸟类丰度跨海湾（R-2=0.503，P=0.006）。相比之下，尽管潮汐高度之间的鸟类丰度的差异，没有证据表明，吸虫的流行反映了鸟类的空间分布在小规模的研究，这表明，淹没时间的差异相关的因素可能会覆盖从鸟类吸虫卵的差异输入。
Shorebird abundance and spatial distribution of larval trematodes in the New Zealand mudsnail, Zeacumantus subcarinatus, were investigated in soft-sediment intertidal bays within Otago Harbour, South Island, New Zealand. In a small-scale study, recruitment of trematodes to caged sentinel snails and the prevalence of infection in free-living snails were examined across a grid of fifteen 50x25 m plots arranged in a representative area of an intertidal bay, in relation to within-plot shorebird abundance (definitive hosts) and tidal height. In a large-scale study, natural spatial variation of larval trematodes in Z. subcarinatus was examined across 12 bays in relation to local abundance of shorebirds. Our results revealed that trematode prevalence in snails was positively correlated with bird abundance across bays (R-2=0.503, P=0.006). In contrast, despite a difference in bird abundance between tidal heights, there was no evidence that trematode prevalence reflected the spatial distribution of birds in the small-scale study, suggesting that factors related to differences in submersion time may override the differential input of trematode eggs from birds.