In situ imaging across ecosystems to resolve the fine‐scale oceanographic drivers of a globally significant planktonic grazer
In situ imaging across ecosystems to resolve the fine‐scale oceanographic drivers of a globally significant planktonic grazer
复制标题
跨生态系统的原位成像，以解决全球重要浮游食草动物的精细海洋学驱动因素
DOI：
10.1002/lno.12259
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发表时间：
2022
影响因子：
4.5
通讯作者：
Sponaugle, Su
中科院分区：
文献类型：
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作者：
Greer, Adam T.;Schmid, Moritz S.;Duffy, Patrick I.;Robinson, Kelly L.;Genung, Mark A.;Luo, Jessica Y.;Panaïotis, Thelma;Briseño‐Avena, Christian;Frischer, Marc E.;Sponaugle, Su
水母是世界各地海洋生态系统中常见的胶状食草动物，由于其种群规模大，生长和排泄速度快，可能会影响碳循环。这些生物的聚集或繁殖经常发生，但它们很难测量或预测，因为它们是脆弱的，在传统的浮游生物网中取样，并且可以在精细的空间尺度（1-10米）上聚集。此外，生态学研究通常针对单个区域或地点，而这些区域或地点不包括有利于水母繁殖的可能栖息地范围。为了解决这些限制，我们结合了六个沿海生态系统的原位成像数据，包括俄勒冈大陆架、加利福尼亚北部、加利福尼亚南部海湾、墨西哥湾北部、佛罗里达海峡和地中海，以解决和比较在温暖的月份，当环境梯度很强，经常记录到珊瑚虫繁殖时，珊瑚虫栖息地的关联。较高的海洋温度是整个生态系统中浮游生物丰度升高的最强预测因子，叶绿素荧光和溶解氧解释了额外的差异。对于具有广泛生产力制度的边缘海域，当总丰度较低时，乳母阶段往往包含较高比例的油石。然而，这种模式在持续沿海上升流的生态系统中并不成立。在地中海和加利福尼亚南部的低营养系统中，微生态环境有利于微生态系统的扩散。类似的比较方法可以解决快速繁殖的海洋动物所实现的生态位问题，从而改进种群水平对变化的海洋条件的响应预测。
Doliolids are common gelatinous grazers in marine ecosystems around the world and likely influence carbon cycling due to their large population sizes with high growth and excretion rates. Aggregations or blooms of these organisms occur frequently, but they are difficult to measure or predict because doliolids are fragile, under sampled with conventional plankton nets, and can aggregate on fine spatial scales (1–10 m). Moreover, ecological studies typically target a single region or site that does not encompass the range of possible habitats favoring doliolid proliferation. To address these limitations, we combined in situ imaging data from six coastal ecosystems, including the Oregon shelf, northern California, southern California Bight, northern Gulf of Mexico, Straits of Florida, and Mediterranean Sea, to resolve and compare doliolid habitat associations during warm months when environmental gradients are strong and doliolid blooms are frequently documented. Higher ocean temperature was the strongest predictor of elevated doliolid abundances across ecosystems, with additional variance explained by chlorophyllafluorescence and dissolved oxygen. For marginal seas with a wide range of productivity regimes, the nurse stage tended to comprise a higher proportion of the doliolids when total abundance was low. However, this pattern did not hold in ecosystems with persistent coastal upwelling. The doliolids tended to be most aggregated in oligotrophic systems (Mediterranea and southern California), suggesting that microhabitats within the water column favor proliferation on fine spatial scales. Similar comparative approaches can resolve the realized niche of fast‐reproducing marine animals, thus improving predictions for population‐level responses to changing oceanographic conditions.