Both hydrology and physicochemistry influence diatom morphometry
Both hydrology and physicochemistry influence diatom morphometry
复制标题
DOI：
10.1080/0269249x.2020.1828175
复制
发表时间：
2020-10-17
期刊：
影响因子：
1.8
通讯作者：
Beszteri, Bank
中科院分区：
文献类型：
--
作者：
Burfeid-Castellanos, Andrea M.;Kloster, Michael;Beszteri, Bank
已有研究表明，浮游硅藻的大小对水化学的变化有反应，但对不同类型的环境因子对底栖硅藻大小变化的影响知之甚少。在这里，我们问水化学或水形态的影响对底栖硅藻形态计量学的影响是否更大。在十年的生物监测工作中，对埃布罗河流域8个地点的48个样本进行了10,624个硅藻瓣膜/锥体的成像、鉴定和测量。我们分析了地表体积比(S/V)和其他形态计量学特征的差异如何与环境参数的时空变异性有关。我们的结果表明，水文和物理化学变量在种间和种内形态计量变异中都产生了显著的响应。S/V比值和跨根尖宽度的反应最强，其次是细胞体积。淡水底栖硅藻形态似乎对不同的环境因素做出了响应，可以为群落组成提供补充的生态信息。
It has been shown that size of planktonic diatoms responds to changes in water chemistry, but little is known about the influence of different types of environmental factors upon benthic diatom size variation. Here we ask whether water chemistry or hydromorphological influences show a stronger effect on benthic diatom morphometry. 10,624 diatom valves / frustules were imaged, identified and measured from 48 samples across eight sites in the Ebro river basin obtained during ten years of biomonitoring work. We analysed how differences in surface-to-volume (S/V) ratio and other morphometric characteristics were related to spatial and temporal variability in environmental parameters. Our results show that both hydrological and physicochemical variables generated significant responses in interspecific and intraspecific morphometric variation. S/V ratio and transapical width showed the strongest responses, followed by (the predominantly used) cell volume. Freshwater benthic diatom morphology seems to respond to diverse environmental factors and could provide complementary ecological information to community composition.