An approach for the identification of exemplar sites for scaling up targeted field observations of benthic biogeochemistry in heterogeneous environments.
An approach for the identification of exemplar sites for scaling up targeted field observations of benthic biogeochemistry in heterogeneous environments.
复制标题
一种识别范例地点的方法，用于扩大异质环境中海底生物地球化学的目标现场观测。
DOI：
10.1007/s10533-017-0366-1
复制
发表时间：
2017
期刊：
影响因子：
4
通讯作者：
Thompson CEL
中科院分区：
文献类型：
--
作者：
Thompson CEL
大陆架沉积物是全球重要的地球化学活动。对大陆架尺度的碳和营养物存量和通量进行量化，需要对在有限的空间和时间点所作的观测进行外推。选择示范网站的程序，以形成这种放大的基础上讨论了英国资助的研究计划，调查陆架海的地球化学。提出了一个三步选择过程，其中（1）选择一个代表英国陆架沉积物异质性的目标区域，（2）评估目标区域在沉积物和生境类型、床和水柱结构以及水动力强迫方面的空间异质性，以及（3）在这一目标区域内选择研究地点，包括解决以下关键科学问题所需的空间异质性范围大陆架尺度的地球化学，并尽量减少混杂变量。这导致在凯尔特海内选择四个地点，它们在沉积物、海床结构以及大型底栖动物、小型底栖动物和微生物群落结构和多样性方面有很大不同，但在水深、潮汐和波浪的大小和方向、温度和盐度方面变化很小。它们构成了包括春季开花周期在内的观测、取样和实验研究巡航方案的基础。典型的变化，在关键的地球化学，沉积物，生物和水动力参数在一个前到后的水华期间，在该地区的人为影响的讨论。这种方法确保了特定地点的工作最有可能对扩大规模的活动有用，增加了我们对英国大陆架尺度的底栖生物地球化学的了解。
Continental shelf sediments are globally important for biogeochemical activity. Quantification of shelf-scale stocks and fluxes of carbon and nutrients requires the extrapolation of observations made at limited points in space and time. The procedure for selecting exemplar sites to form the basis of this up-scaling is discussed in relation to a UK-funded research programme investigating biogeochemistry in shelf seas. A three-step selection process is proposed in which (1) a target area representative of UK shelf sediment heterogeneity is selected, (2) the target area is assessed for spatial heterogeneity in sediment and habitat type, bed and water column structure and hydrodynamic forcing, and (3) study sites are selected within this target area encompassing the range of spatial heterogeneity required to address key scientific questions regarding shelf scale biogeochemistry, and minimise confounding variables. This led to the selection of four sites within the Celtic Sea that are significantly different in terms of their sediment, bed structure, and macrofaunal, meiofaunal and microbial community structures and diversity, but have minimal variations in water depth, tidal and wave magnitudes and directions, temperature and salinity. They form the basis of a research cruise programme of observation, sampling and experimentation encompassing the spring bloom cycle. Typical variation in key biogeochemical, sediment, biological and hydrodynamic parameters over a pre to post bloom period are presented, with a discussion of anthropogenic influences in the region. This methodology ensures the best likelihood of site-specific work being useful for up-scaling activities, increasing our understanding of benthic biogeochemistry at the UK-shelf scale.