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首页> 外文期刊>Marine ecology progress series >Spatial patterns in early post-settlement processes of the green sea urchin Strongylocentrotus droebachiensis
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Spatial patterns in early post-settlement processes of the green sea urchin Strongylocentrotus droebachiensis

机译：绿海顽童Strongylocentrotus droebachiensis沉降后早期的空间格局

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Small juvenile benthic invertebrates are exposed to a variety of organisms that may affect their growth and survival; however, most studies focus on larger, mobile predators. This study examined if the often disregarded suite of cryptic macro-benthic invertebrates increased the mortality and decreased the growth of small juvenile sea urchins Strongylocentrotus droebachiensis (1-3 mm) in a caging experiment executed in Passmaquoddy Bay, Bay of Fundy, Canada. The sea urchins had greater mortality (4.1 % wk~(-1)) across all sites when the suite of small animals was present in experimental cages than when it was removed (2.4 % wk~(-1)). The addition of food (kelp and associated biofilms) had no effect on their mortality. Growth of the juvenile sea urchins in the cages ranged from 3.3-8.1 % wk~(-1) across the treatments, and varied across sites (spatial scale of 100s of m). Small juvenile sea urchins had greater growth when the suite of animals was removed (6.6 vs. 4.3% wk~(-1)), as well as with the presence of food (5.6 vs. 5.1% wk~(-1)). Sea urchin mortality and growth were related to the abundances of larger sea urchins, chitons, and scale worms (mortality only) (mortality general linear model [GLM]: Z_(131) ＜ -2.95, p ＜ 0.0032; growth linear model [LM]: F_(1.131) ＞ 15.29, p ＜ 0.0001). The mortality patterns found in the cages were similar to natural patterns over the same time period at 4 of the 6 sites. Overall, the suite of animals living amongst cobbles generally resulted in an increase in mortality and a decrease in growth of small juvenile sea urchins in Passamaquoddy Bay, indicating that these small organisms can influence early post-settlement growth and mortality across spatial scales of 100 to 5000 m.
机译：小型底栖无脊椎动物暴露于各种可能影响其生长和生存的生物。但是，大多数研究都集中在大型的移动掠食者上。这项研究在加拿大芬迪湾Passmaquoddy湾进行的笼养实验中，检查了经常被忽视的一组隐秘的大型底栖无脊椎动物是否增加了死亡率并降低了小型海胆Strongylocentrotus droebachiensis（1-3 mm）的生长。当实验笼中有小动物时，海胆在所有地点的死亡率（4.1％wk〜（-1））要比移走海胆时高（2.4％wk〜（-1））。食物（海带和相关生物膜）的添加对其死亡率没有影响。在整个处理过程中，网箱中的幼小海胆的生长范围为3.3-8.1％wk〜（-1），并且在各个站点之间变化（空间尺度为100 s m）。当移走这批动物时，小型海胆有较大的生长（6.6 vs. 4.3％wk〜（-1）），并且在有食物的情况下（5.6 vs. 5.1％wk〜（-1））。海胆的死亡率和生长与大型海胆、,虫和鳞虫的数量有关（仅死亡率）（死亡率一般线性模型[GLM]：Z_（131）＜-2.95，p ＜0.0032；生长线性模型[LM ]：F_（1.131）＞ 15.29，p ＜0.0001）。 6个地点中有4个地点在同一时间段内在笼子中发现的死亡率模式与自然模式相似。总体而言，居住在鹅卵石间的动物通常导致帕萨马夸迪湾的死亡率上升，小型海胆的生长减少，这表明这些小型生物可以影响定居后早期的生长和死亡率，范围从100到100 5000米

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