Arid
DOI10.1086/699004
Substrate-specific biofilms control nutrient uptake in experimental streams
Hanrahan, Brittany R.1; Tank, Jennifer L.1; Aubeneau, Antoine F.2; Bolster, Diogo3
通讯作者Hanrahan, Brittany R.
来源期刊FRESHWATER SCIENCE
ISSN2161-9549
EISSN2161-9565
出版年2018
卷号37期号:3页码:456-471
英文摘要

Substrate heterogeneity and biofilm colonization in streams vary across both time and space, but their relative contribution to reach-scale nutrient uptake is difficult to partition. We performed multiple short-term nutrient additions over a 4-mo colonization sequence in 4 small, groundwater-fed, experimental streams. We quantified the influence of substrate size (pea gravel vs cobble) and heterogeneity (alternating sections vs well mixed) on the uptake of NH4+, NO3(-), and soluble reactive P (SRP) and transient storage properties. In general, the effect of benthic substrate on uptake velocity (v(f)) and areal nutrient uptake (U) were inversely related to substrate size, and both metrics were highest in the stream lined with pea gravel, lowest in cobble, and intermediate in streams with alternating and mixed substrates. Substrate trends were consistent among solute types, but the magnitude of uptake differed. Uptake generally was higher for NH4+ than for NO3- and SRP in these open-canopy systems. Algal biomass controlled temporal patterns of nutrient uptake but reduced exchange of water between the stream channel and transient storage zone (k(1)) such that k(1) decreased as nutrient uptake increased. Our results uniquely demonstrate that substrate heterogeneity and substrate-specific biofilms interact to influence biogeochemical cycling in streams, with implications for the role of substrate in restoring ecosystem function in impaired systems.


英文关键词nutrient uptake benthic substrate biofilms transient storage
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000441679400003
WOS关键词HEADWATER STREAMS ; PERIPHYTON BIOMASS ; TRANSIENT STORAGE ; PHOSPHORUS UPTAKE ; LAND-USE ; TEMPORAL VARIATION ; DESERT STREAM ; MOUNTAIN STREAMS ; AMMONIUM UPTAKE ; NITROGEN UPTAKE
WOS类目Ecology ; Marine & Freshwater Biology
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209402
作者单位1.Univ Notre Dame, Dept Biol Sci, Notre Dame, IN 46556 USA;
2.Purdue Univ, Lyles Sch Civil Engn, W Lafayette, IN 47907 USA;
3.Univ Notre Dame, Dept Civil & Environm Engn & Earth Sci, Notre Dame, IN 46556 USA
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Hanrahan, Brittany R.,Tank, Jennifer L.,Aubeneau, Antoine F.,et al. Substrate-specific biofilms control nutrient uptake in experimental streams[J],2018,37(3):456-471.
APA Hanrahan, Brittany R.,Tank, Jennifer L.,Aubeneau, Antoine F.,&Bolster, Diogo.(2018).Substrate-specific biofilms control nutrient uptake in experimental streams.FRESHWATER SCIENCE,37(3),456-471.
MLA Hanrahan, Brittany R.,et al."Substrate-specific biofilms control nutrient uptake in experimental streams".FRESHWATER SCIENCE 37.3(2018):456-471.
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